MCR Model Research Articles

Construction of Wetland Ecological Security Pattern in Wuhan Metropolitan Core Area Considering Wetland Ecological Risk

Wetlands play a crucial role in maintaining biodiversity and ecological balance. Preserving the ecological security of wetlands is critically important for regional environmental protection and sustainable development. However, in the core area of the Wuhan metropolitan circle, which is rapidly urbanizing, its wetlands are more susceptible to external natural environmental risks, such as changes in temperature and rainfall, as well as risks to human activity, such as social and economic activities, urban expansion, land use changes, and population growth. Meanwhile, the internal vulnerability of wetlands in terms of their spatial extent, structure, and functions also exacerbates ecological risks. These factors collectively influence the formation and development of wetland ecological risks. This study aims to comprehensively assess wetland ecological risks in the core area of the Wuhan metropolitan circle by combining external hazards and internal vulnerabilities and to construct and optimize the wetlands’ ecological security pattern. We used the MSPA method to identify potential ecological sources. Additionally, the MCR model was employed to integrate ecological risk assessment results into the resistance surface, identify potential ecological corridors and nodes, construct the wetland ecological security pattern for the urban circle, and propose specific optimization strategies. In total, 31 primary and 106 secondary ecological sources were selected, along with 20 primary and 42 secondary ecological nodes. Furthermore, 10 major ecological corridors were constructed. Considering the landscape characteristics of the wetlands in the core area of the Wuhan metropolitan circle, the southern Yangtze River region will center around the Liangzi Lake group to establish a crucial corridor network, promoting overall wetland restoration and connectivity. Meanwhile, the northern Yangtze River region will form a chain-like distribution along the river, creating diverse ecosystems. This study provides a theoretical foundation for constructing and optimizing the ecological security pattern of wetlands, laying a solid groundwork for promoting regional wetland conservation and sustainable development.

Stepwise Construction and Integration of Ecological Network in Resource-Based Regions: A Case Study on Liaoning Province, China

Ecological networks are an effective strategy to maintain regional ecological security. However, current research on ecological network construction in areas with large-scale resource extraction is limited. Moreover, classic ecological network construction methods do not perform satisfactorily when implemented in heavily damaged mining landscapes. Taking the example of Liaoning Province, China, a framework for stepwise renewal of ecological networks was proposed, which integrates basic ecological sources and other sources that include mining areas. The framework was based on multi-source ecological environment monitoring data, and all potential ecological sources were extracted and screened using an MSPA model and the area threshold method. Further, ecological sources were classified into two types and three levels based on the influence of abandoned mines and the characteristics of ecosystem services in the ecological sources. Ecological corridors were extracted using the MCR model. An ecological corridor optimization process based on combining the gravity model with addition and removal rules of corridors was proposed. The results indicated that the basic ecological network in Liaoning Province included 101 ecological sources and 162 ecological corridors, and the supplementary ecological network included 28 ecological sources and 67 ecological corridors. The ecological sources were divided into two types, and corridors were divided into three types. The basic ecological network exhibited a spatial distribution of discrete connections in the west and close connections in the east. Changes in ecological network topological indicators indicated that a supplementary ecological network strengthened the structural performance of the regional ecological network, expanding spatial coverage, filling hollow areas, and enriching local details of the regional ecological network. Regulation strategies were proposed for ecological sources with different connection modes. The number of ecological sources implementing restrictive development, pattern optimization, and protective development were 101, 12, and 16, respectively. This paper provides a constructing framework of ecological networks adapted for resource-based regions. This method can support decisions for the environmental governance of mines, thus contributing to a balance between resource exploitation and ecological protection in regions.

Integrating supply and benefits of ecosystem services into ecological security pattern: A spatial flow perspective

Ecological security pattern (ESP) is an effective way to alleviate the conflict between social development and ecological conservation. Previous studies on ESP mostly identified ecological sources derived from local supply and demand of diverse ecosystem services (ESs), overlooking the spatial flow of ESs and thus limiting its significance in both local and regional scales. This study proposed a framework integrating ESs supply and benefit from a spatial flow perspective for ecological sources identification. After modifying resistance surface by nighttime light data and extracting ecological corridors by MCR model, the ESP was finally constructed and optimized for sustainable land use management in the Yangtze River Delta (YRD) in 2020. The findings indicated that ecological sources were predominantly concentrated in the southwestern forestland and central Taihu Lake region, accounting for 18.47 % of the total area in the YRD. Totally 1035 ecological corridors were extracted, including 45 main corridors with a distance of 4284.47 km, overall exhibiting a “one vertical and three horizontals” shape distribution. Finally, an ESP of “four areas and four lines” was constructed after optimization, and targeted suggestions were proposed for regional sustainability. This study introduced spatial flow perspective and ESs benefit into ESP construction, which provides a scientific basis for sustainable land use management in a regional integration perspective.

Integrating Risk-Conflict assessment for constructing and optimizing ecological security patterns of Polder landscape in the Urban-Rural fringe

Jianghan Plain is an important grain-producing area in China, and the transformation of the natural environment by the long-term polder activities of the people in this area has created a characteristic polder landscape. After 2000, urbanization has led to the destruction of ecosystems in these polder landscapes, especially in sensitive areas at the urban–rural interface. ESP can help mitigate this threat by systematically identifying and connecting ecologically significant areas to enhance ecosystem stability and sustainability. In this paper, taking Dongxihu Polder as an example, we apply multi-source remote sensing data to develop LER and LUC models. Combining these with MCR model, we construct an ESP for Dongxihu Polder. The study shows that (1) the growth of LER and LUC in Dongxihu Polder is characterized by “strong dynamics, high complexity and weak protection”, which is closely related to the urban expansion of the urban–rural boundary area; (2) Watersheds, woodlands, and farmlands play an important role in controlling LERs and LUCs, so we identified 33 ecologically important source areas that are mainly concentrated in these regions; (3) In this paper, 46 ecological strategic nodes and 16 ecological corridors were extracted to construct the Dongxihu Polder ESP of “one ring, five axes, multiple points and multiple chains”, and suggested specific optimization strategies. The study provides feasible ecological management policy recommendations for the protection as well as sustainable development of Dongxihu Polder.

Evaluation of urban ecological security model based on GIS sensing and MCR model

Urban ecological security is not only a basic safety requirement for human security and development, but also an important part of national security and other security and infrastructure carriers. Protecting the environment is an important factor in the construction of China's natural civilization. In recent years, with the deterioration of the environment, the region and its people have paid more and more attention to the safety of urban ecological environment, which has become one of the hottest issues in current research. Land use/cover rate change (LUCC) affects the environment, which will also affect environmental safety, and changes in its appearance will also affect nature and the environment, providing a positive impetus for the control of natural processes. In this paper, researches on the above problems in City K and Zhengzhou are carried out, using MSPA and visual image forms to better connect local resources, and through the MCR model based on ecological control, a weight-based multi-structure network model is established, which is conducive to the establishment of a multi-structure network model based on ecological control. Build a city of environmental science network. The GIS control line was explored, and the concept of the control line was filled to a certain extent. At the same time, taking City K and Zhengzhou as examples, determining the breadth of their layout and management, as well as the control strategy of their environmental control lines, provides a specific reference angle for the layout and research of other cities. Urban ecological security is very important to each of us living in cities. It is a difficult problem at this stage to establish an ecological security model to open a new security pattern.

Research on the Construction of Rural Living Circles in Hilly and Gully Areas of the Loess Plateau: A Case Study of Guanghe County

Ue and practical significance for achieving equitable urban and rural infrastructure within a region and promoting integrated urban-rural development. Employing landscape ecology theory and GIS spatial analysis techniques, this paper comprehensively analyzes the construction of rural living circles in Guanghe County, taking into account the convergence characteristics of residents' daily life trajectories and biological migration movements. The results indicate: (1) Within the "resistance surface" of Guanghe County, easily accessible areas and generally accessible areas account for 69.92% of the total area, while relatively difficult-to-access and hard-to-access areas constitute 30.08% of the total area, with weaker development potential in these regions. (2) Based on the results of the MCR model, a methodological pathway for identifying rural living circles is established. This includes delineating a "four-level, three-category" system for rural living circles in Guanghe County, and proposing a "mandatory allocation + selective allocation" modular customization approach to precisely allocate public service facilities. (3) Building upon the concept of travel "resistance surfaces," the study introduces transportation resistance coefficients to delineate different scales of living circles between river valley plain areas and mountainous areas. The research findings provide a basis for the construction of rural living circles in hilly and gully areas of the Loess Plateau.

Construction of the Ecological Security Pattern in Xishuangbanna Tropical Rainforest Based on Circuit Theory

Urban modernization and economic globalization have led to significant changes in traditional natural landscapes. The unregulated and large-scale expansion of rubber plantations in Xishuangbanna has resulted in water and scenic forests being replaced by rubber forests and the complex rainforest ecosystem being replaced by simple artificial forests. This has resulted in increasingly prominent ecological problems such as soil erosion, regional microclimate changes, and sharp declines in biodiversity. The ecological security pattern is an important way to protect regional ecological sustainability. Taking the tropical rainforest in Xishuangbanna as an example, this study identified ecological sources through the evaluation of the importance of ecosystem services, constructed resistance surfaces through ecological sensitivity evaluation, and used circuit theory to simulate ecological processes in heterogeneous landscapes by calculating “electricity” or “resistance”, thereby identifying ecological corridors and key ecological nodes. The results identified 31 ecological source areas, 65 key ecological corridors, 7 potential ecological corridors, 37 ecological pinch points, and 99 ecological barriers. The overall distribution of ecological sources was scattered, with higher density in the northwest and southeast regions. Ecological corridors were distributed along high mountains, and both ecological sources and corridors were mainly composed of forest land. Based on circuit theory, this study filled the gap in the MCR model’s inability to identify the true width of corridors due to ignoring the randomness of biological migration. It determined the spatial range of ecological corridors and the specific locations of ecological nodes and barriers, providing a reference for solving ecological problems in Xishuangbanna, such as “rainforest fragmentation”.

Evaluating suitability of development and construction with of minimum cumulative resistance model for a mountain scenic area in Jinyun Xiandu, China

Owing to the intricate nature of the ecological environment and spatial complexity, effectively mitigating over-exploitation and ecological harm poses a challenge during the development and construction of mountain scenic areas. Ttraditional ecological sensitivity assessment employed in mountain scenic areas mainly focuses on ecological protection, neglecting the dynamic interplay between ecology and the evolution of construction land.Taking Xiandu mountain scenic area, a representative mountainous development zone in Jinyun County, Lishui City, Zhejiang Province, China, as a study area, this study employs the minimum cumulative resistance model (MCR) to simulate the resistance encountered by ecological sources and construction activities during the expansion process. The study establishes an evaluation framework for development in mountain scenic areas, considering ecological processes both vertically and horizontally. Quantitative analyses are performed through ArcGIS and the analytic network process (ANP) to delineate development adaptability zones in the mountain scenic area. The study utilizes grid mutation points to determine the zoning threshold for development suitability in mountain scenic areas, resulting in the categorization of these areas into four distinct types of development zones: most appropriate for construction, suitable for construction, not suitable for construction, and least suitable for construction.The partition result shows that the most appropriate construction area constitutes 6.68% of the primary scenic area, while the suitable construction zone occupies 40.64% of the main scenic expanse.The study can expand the application area of the MCR model, and the evaluation framework can augment the accuracy and breadth for future mountain scenic area development researches.

Application of MSPA-MCR models to construct ecological security pattern in the basin: A case study of Dawen River basin

Building an ecological security pattern (ESP) can safeguard and improve the structure, functions and services of regional ecosystems. Furthermore, it is also one of the significant spatial methods to mitigate the conflict between ecological conservation and economic growth. Most previous researches on the construction of ESP have directly utilized extensive regions of forestland, grassland, water area or nature reserves as ecological sources (ESs) without weighing the habitat quality (HQ) and ecological protection red line (EPRL). The ES of the Dawen River basin (DRB) was identified through morphological spatial pattern analysis (MSPA) and landscape connectivity index. By employing the minimum cumulative resistance model (MCR), the potential ecological corridor (EC) was identified, and its importance was evaluated by gravity model. Simultaneously, the spatial properties of HQ and ecological resistance (ER) were analyzed. Finally, this paper proposed an optimization strategy for ESP in accordance with the EPRL. The results indicate that: (1) The DRB contained 15 important ESs, mainly concentrated in water and mountain forest areas. (2) 105 ECs were extracted by MCR and gravity model, including 35 level 1 corridors and 70 level 2 corridors, which were primarily concentrated in the eastern region of the basin. (3) Based on the spatial characteristics of HQ and ER, as well as the EPRL in the research, the ESP of “one axis, two belts and five zones” in the DRB was constructed and control strategies were proposed. This research offers some reference for ecological environment protection and restoration and regional sustainable development in the Yellow River basin.

Are wading birds the ideal focal species for broader bird conservation? A cost-effective approach to ecological network planning

Focal species play a crucial role in planning ecological networks (ENs). Despite the finding that ENs designed for a specific focal species can yield benefits for associated communities, current practices of applying individual focal species have faced criticism for oversimplifying intricate ecosystems. Besides, the aggregation of ENs for individual species has been demonstrated as ineffective and costly. To improve cost-effectiveness, species with similar habitat preferences are typically conserved using shared strategies. Thus, drawing from the habitat preference of wading birds for blue and green spaces, we hypothesized that an EN for wading birds may benefit co-existing water and forest birds that prefer blue or green spaces. To validate this hypothesis, we conducted our study in the Yangtze River Delta’s Ecological Green Integration Demonstration Zone. We simulated six scenarios S1-S6 to compare the cost-effectiveness of focal species networks, respectively for water, forest, and wading birds in the S2-S4, with the aggregate networks in the S5-S6. During ENs’ construction, we employed the InVEST Habitat Quality model, MSPA, MCR model, and Linkage Mapper Tools. Furthermore, we selected the most cost-effective EN by calculating six ENs’ connectivity-cost ratio (CCr index) and ranked the conservation priority for its sources and corridors. The results showed that the EN4 ranked highest in the CCr index and displayed a high conservation efficiency for all bird species. 93.41% of primary ES4 and 42.46% of secondary ES4 overlapped with the ecological conservation redline and the permanent basic farmland and could be well protected under current statutory planning. Our findings confirm that wading birds are the ideal focal species in EN planning for broader bird conservation in the context of the Yangtze River Delta. The constructed regional EN could contribute to establishing a linkage with the supra-regional EN and the world’s major bird migration flyway. Moreover, our cost-effective approach to bird conservation could provide new insights for targeting focal species from the perspective of habitat preference in multi-species EN planning.

Simultaneous determination of meloxicam and bupivacaine via a novel modified dual wavelength method and an advanced chemometric approach

This study presents two spectrophotometric methods; a novel dual wavelength—derivative spectrophotometry and multivariate curve resolution-alternating least squares (MCR-ALS) for the simultaneous determination of a fixed dose combination of bupivacaine (BUP) and meloxicam (MEL) in a ratio of 30:1. The extended UV spectrum of MEL enables its direct determination at λmax 360 nm with no interference from BUP. The determination of BUP was unfeasible directly because the UV spectra of both drugs are moderately overlapped over the wavelength range of 250–450 nm, thus new chemometric based spectrophotometric methods should be developed for its determination. Dual wavelength-derivative method was employed based on using first derivative spectra. The selected dual wavelengths for determination BUP were 274.6 nm and 374.6 nm where the dA/dλ amplitudes differences for MET are equal to zero. MCR-ALS is advanced chemometric tool that enables analysis of multicomponent samples in complex matrices with high resolution based on the decomposition of signal/spectral data into the pure spectra and corresponding concentration profile. The figures of merits for MCR model show that there is a good agreement between the actual and predicted concentrations for MEL and BUP. The methods were validated and statistically compared with a reported HPLC method.

Enhanced efficiency of MS/MS all-ion fragmentation for non-targeted analysis of trace contaminants in surface water using multivariate curve resolution and data fusion

Data-independent acquisition–all-ion fragmentation (DIA-AIF) mode of mass spectrometry can facilitate wide-scope non-target analysis of contaminants in surface water due to comprehensive spectral identification. However, because of the complexity of the resulting MS2 AIF spectra, identifying unknown pollutants remains a significant challenge, with a significant bottleneck in translating non-targeted chemical signatures into environmental impacts. The present study proposes to process fused MS1 and MS2 data sets obtained from LC-HRMS/MS measurements in non-targeted AIF workflows on surface water samples using multivariate curve resolution-alternating least squares (MCR-ALS). This enables straightforward assignment between precursor ions obtained from resolved MS1 spectra and their corresponding MS2 spectra. The method was evaluated for two sets of tap water and surface water contaminated with 14 target chemicals as a proof of concept. The data set of surface water samples consisting of 3506 MS1 and 2170 MS2 AIF mass spectral features was reduced to 81 components via a fused MS1-MS2 MCR model that describes at least 98.8% of the data. Each component summarizes the distinct chromatographic elution of components together with their corresponding MS1 and MS2 spectra. MS2 spectral similarity of more than 82% was obtained for most target chemicals. This highlights the potential of this method for unraveling the composition of MS/MS complex data in a water environment. Ultimately, the developed approach was applied to the retrospective non-target analysis of an independent set of surface water samples.Graphical abstract

From separation to incorporation: Development of a unifying framework that integrated bird habitats with public recreation spaces within the wetland park system

The Ramsar Convention places central emphasis on the protection, restoration, and utilization of wetlands. Wetland species and their habitat protection is an important embodiment of wetland system protection. Simultaneously, the importance of recreation as a form of human activity within wetlands should not be underestimated. Wetland parks, as a mode of rational wetland use, provide the public opportunities for leisure and entertainment, exemplifying China's commitment to the Ramsar Convention on Wetlands. However, With the acceleration of urbanization, the degree of fragmentation of the wetland system is increasing. The wetland park and its surrounding landscape elements are separated from each other, resulting in the phenomenon of islanding, which is not conducive to the protection and utilization of wetland biodiversity. This study focuses on Yancheng coastal wetland, a UNESCO World Heritage site in Jiangsu, China, as its research area. It integrates habitat birds, a core component of wetland biodiversity, into the development framework of wetland parks. The study proposes the use of composite habitat corridors to connect fragmented bird habitats with public recreational areas, establishing a collaborative wetland park system. The methodology involved three key steps: (1)Spatial Modeling. Utilizing Maxent, the spatial distribution of birds and public recreation areas was modeled, and suitable patches for both were extracted. (2) Corridor Identification. Linkage Mapper was employed to identify bird and recreational corridors, while the MCR model was used to pinpoint composite habitat corridors. (3) Network Development. Corridors generated in the previous step were superimposed on the ArcGIS platform to create a network of interconnected bird habitats and public recreation areas within the wetland park system. The study's results demonstrate: (1) There are obvious spatial distribution differences between the current core bird habitat and public recreation areas in Yancheng coastal wetland. (2) The establishment of a composite corridor network realizes the interconnection between bird habitats and public recreation areas，among them, the corridor network in the southern region is short and dense, with higher stability. (3) The areas passed by the composite corridor network are mainly productive landscapes such as cultivated land and aquaculture ponds, and therefore, certain protection and restoration measures should be taken to create suitable habitat conditions for birds and humans. This study provides a novel model for wetland protection and sustainable utilization, particularly relevant to many developing countries facing similar challenges.

Urban Development Boundary Setting Versus Ecological Security and Internal Urban Demand: Evidence from Haikou, China

Amidst rapid urbanization, the conflict between urban population and land is intensifying due to ecological degradation and imbalanced supply and demand of land resources in and around cities. Demarcating the urban development boundary is a specific measure to regulate the scale and form of urban expansion while considering internal urban demand as well as ecological security. This study took Haikou City, China, as the study area, exploring a new way to take into account the external constraints and endogenous mechanisms of urban expansion, constructing a comprehensive ecological security pattern (ESP) using the MCR model, demarcating recent rigid development boundaries, and demarcating future elastic development boundaries using the CA–Markov model. The results were the following: (1) By identifying the current urban boundary in 2020, the urban land area of Haikou City was found to be 261.64 km2. (2) Using the MCR model to construct comprehensive ESP and demarcate a rigid development boundary revealed that the total area within the boundary was 398.37 km2, with an additional growth potential of up to 136.73 km2. (3) Demarcating elastic boundaries for Haikou City in 2030, 2040 and 2050 using the CA–Markov model while considering natural and socio-economic driving factors and constraints showed the internal areas within these boundaries to be calculated at 451.80, 489.46 and 523.37 km2, respectively, which were higher than that in 2020 by 190.16, 227.82 and 261.73 km2. (4) Some suggestions, such as establishing a comprehensive technical system, ensuring robust policy support and legal protection, and improving the responsibility management system, were proposed in the implementation of urban development boundaries. Scientifically and reasonably demarcating the recent rigid urban development boundary and future elastic urban development boundaries can ensure sustainable urban development while preserving the ecological environment and satisfying urban development demand.

Study on the relationship between ecological spatial network structure and regional carbon use Efficiency: A case study of the Wuding river basin

Plant carbon use efficiency (CUE) reflects the carbon assimilation ability and carbon sequestration potential of organisms, and is an important quantitative index in ecology. Therefore, investigating CUE can better understand and explore ecosystem carbon flux and carbon allocation patterns. In this paper, the Wuding River Basin is taken as the research area. MODIS were used to calculate CUE and explore its spatiotemporal variations. Using remote sensing environmental indicators (RSEI) extract ecological sources, and the MCR model were used to construct an ecological spatial network. By analogy with complex network theory, calculate topological indicators, and combine its ecological significance to investigate the relationship between CUE and these indicators, considering their ecological significance. The results are as follows: (1) The average CUE value slightly increased, with an overall increase in the southeastern part of the study area, minor changes in the southern parts, and an overall decrease in the western and northern parts of the basin. (2) CUE showed a strong positive correlation with closeness centrality, betweenness centrality, harmonic closeness centrality, and a negative correlation with eccentricity, while no significant correlation was found with component number.

Identification of Key Areas and Early-Warning Points for Ecological Protection and Restoration in the Yellow River Source Area Based on Ecological Security Pattern

The Yellow River Source Area is located in the ecological protection and restoration area of the Sanjiangyuan in China, which has been deteriorating as a result of human-caused overgrazing and the grassland destruction caused by plateau rats and rabbits, as well as the influence of other natural factors. The Yellow River Source Area is an important area that implements ecological restoration and protection in the Three Rivers Source Region, where the ecologically vulnerable areas that are of great significance to the implementation of ecological restoration in national land space should be identified and the early warning should be extended. This measure can help us identify potential ecological problems and take timely and targeted protection measures to ensure the health and sustainable development of the ecosystem in the Yellow River Source Area. Therefore, an in-depth understanding of the ecological vulnerability of the Yellow River Source Area and the establishment of an early warning mechanism are of vital importance for the protection and restoration of the ecology of the national space in the Yellow River Source Area. Aiming to comprehensively delimit ecological restoration areas in the Yellow River Source Area and provide an early warning, this study applies the MSPA method to identify ecological source areas and uses a patch importance index to identify the importance of ecological source areas, along with extracting potential ecological corridors by using the MCR model, screening important ecological corridors by using the gravity model as a criterion, and simulating land cover changes in 2030 under the limitations of ecological security pattern by using the PLUS model. The results show that: (1) 154 potential ecological corridors were extracted based on the MCR model, with a total length of 7891.90. (2) The total area of the landscape types in the Yellow River Source Area was 12,301 based on MSPA analysis, including the 6899.57 of core area. (3) Based on the PLUS model, the area of farmland and forest in the study area will decrease, while the grassland area will increase. According to the studies, the grassland in the study area expands in a circular pattern towards the surrounding wetland and water area, threatening the ecological sources and corridors. In summary, the study delimits one protection zone in the ecological source land and two core ecological restoration zones and points out the early warning points in the ecological protection space. The delimitation and instruction provide specific spatial guidance for the protection and restoration of ecosystems in order to promote ecological sustainability.

Construction of Rural Multifunctional Landscape Corridor Based on MSPA and MCR Model—Taking Liukeng Cultural and Ecological Tourism Area as an Example

Rapid urbanization has caused serious negative impacts on the ecological and human landscapes of rural areas in China. By constructing a network of multifunctional landscape corridors, we can effectively connect landscape patches, reduce the danger of landscape fragmentation, and effectively protect rural areas′ ecological and human landscape resources. With the help of the Morphological Spatial Pattern Analysis (MSPA) research method, the source sites for constructing landscape corridors were selected from the core areas that play an essential role in the performance of regional ecological functions, using the Liukeng Cultural and Ecological Tourism Area as the study area. The results of MSPA analysis are incorporated into the construction of the landscape resistance surface, the landscape corridor network is constructed using the minimum resistance model (MCR) and gravity model, and the landscape corridor network is improved by adding ecological steppingstones and humanistic landscape nodes. The results showed that ten important corridors and 13 secondary corridors were constructed based on 12 source patches in the study area; 5 ecological steppingstones and ten humanistic landscape nodes were added to the optimized network, 21 corridors were added, and 48 ecological breakpoints were proposed to be restored. The optimized network closure (0.65), line point rate (2.15), network connectivity (0.73), and other indicators indicate that the optimized study area has good connectivity of landscape corridors. The study provides a comparative analysis of landscape granularity suitable for mesoscale. Integrating historical and humanistic landscapes into the construction of landscape corridors is an optimization of previous studies that focused only on natural ecology and neglected historical and humanistic landscapes. The study can be a reference for future research on multi-functional landscape corridors and ecological networks in mesoscale and rural areas. At the same time, the construction of multifunctional landscape corridors can promote the conservation of natural and historical human landscapes and the future development of tourism in rural areas.

Construction of Red Cultural Heritage Corridor in Jinggang Mountain based on MCR Model

Construction of Red Cultural Heritage Corridor in Jinggang Mountain based on MCR Model

Optimization and Zoning of Rural Residential Areas Based on Accessibility of Production and Living Transportation: A Case Study of MengLa County

Spatial layout optimization of rural residential areas is an important part of rural revitalization. Mengla County, as a border county of Yunnan Province, has a large gap between urban and rural areas, and the layout of residential areas is relatively scattered. Therefore, it is of great significance to organize and optimize the spatial layout of rural residential areas. Based on the POI data and road network data information of Mengla County, with the help of ArcGIS tool, Arcpy batch processing, MCR model, OD cost matrix and other methods, the production and living transportation accessibility of rural residential areas in Mengla County was analyzed. The results show that the production and life transportation accessibility of the residential areas in the edge area of Mengla County is poor and the number is small, the transportation accessibility of the natural village gathering area in the urban center is high, and the high accessibility of natural villages between the north and the south is discontinuous. This study evaluated the traffic accessibility of rural settlements from the perspective of production and life traffic accessibility, identified the natural villages with weak traffic, classified the villages accordingly, and put forward corresponding improvement suggestions and strategies.

Analyzing the possibility of using hiqhtorque hydraulic motors for rotation of the drums of automatic concrete mixers

Goal. The goal is conducting an analysis of the use of hydraulic fluid power for rotating the drums of concrete mixers, in particular, evaluating the possibility of using high-torque low-speed radial-piston hydraulic motors instead of axial-piston motors with planetary gearboxes. The technical level of such hydraulic drives is assessed based on the use of mass to torque and power ratios. The nomenclature, technical characteristics and design features of high-torque hydraulic motors are considered. In particular, compared to previous studies, the nomenclature of the considered hydraulic motors is widespread. Method. The methods of comparative analysis of designs and technical characteristics of axial-piston with planetary gearboxes and high-torque hydraulic motors according to the main technical parameters, in particular, the developing pressure, torque, rotation frequency and power depending on the specific indicators of the mass ratio to the absolute values of these parameters were used. Design features of high-torque hydraulic motors were also considered. Originality. For the first time in the domestic literature, a comparative analysis of the performed high -motion hydraulic motors of the MCR model was carried out. Results and practical usefulness. It is recognized that the modern technical level of high-torque hydraulic motors allows to compete with axial-piston gear hydraulic drives for rotating drums with a concrete mixture of auto-concrete mixers. The given materials will be useful in the educational process for machine-building specialists who study hydraulic fluid power as a means of improving the technical level of various machines and mechanisms.