Inevitable Requirement Research Articles

Experimental investigation on the thermal performance of an enhanced convection-radiant heating wall panel with orifices

With the increase of the application scale of renewable energy low-temperature heating system, it is becoming an inevitable requirement to design a new-type heating terminal with good thermal performance, flexible adjustment, and high combination with buildings. In this study, an enhanced convection-radiant wall panel with orifices (CRWPO) is designed and tested. A full-scale CRWPO experimental system was built in a laboratory, and the radiation and convection heat transfer process were measured under different supply water temperatures, orifice diameters, and densities conditions to determine optimal operating conditions. The main intentions of the experimental research include: (1) testing the actual heating effect of the CRWPO heating terminal under the experimental conditions, (2) analyzing the impacts of different design and operation parameters on the thermal performance of CRWPO, and obtaining the ratio of convection to radiation heat dissipation, and (3) summarizing the radiant/convective heat supply of the CRWPO under different working conditions and providing a reference for the heating terminal design. The results showed that enhanced convection heat transfer is achieved by setting orifices on the radiant wall panel. Compared to a wall panel without orifices, the total heat transfer quantity increased by 57%. Furthermore, the heat flux stability time of the CRWPO is about 1–1.5 h, which is about 2–4 h shorter than that of a traditional heavy-weight radiation terminal. Furthermore, The radiation-convection heat transfer ratio decreased from 1.89 to 0.75 when the orifice diameter increased from 0 mm to 20 mm.

Impact of Fiscal Expenditure on Farmers’ Livelihood Capital in the Ethnic Minority Mountainous Region of Sichuan, China

Poverty alleviation is the first battle to realize the rural revitalization strategy in China, and research on the sustainable livelihood of rural households is of great significance to solving the problem of rural poverty. Based on the sustainable livelihood framework, the reasonable scale and structure of fiscal expenditure is an inevitable requirement in producing sustainable livelihood capital toward this aim. In this study, the system Gaussian mixed model was used to analyze the impact of fiscal expenditure on farmers’ livelihoods. Representative survey data uses panel data from 48 counties across Liangshan Prefecture, Ganzi Prefecture, and Aba Prefecture in Sichuan, China. The results are as follows: (1) The average stock of human capital in 2010 to 2015 was the highest in the composition of farmers’ livelihood capital; (2) natural capital and physical capital were positively affected by the total scale of fiscal expenditure, agriculture, forestry, and water expenditure, and the former was negatively affected by general public service expenditure, education expenditure, social security and employment expenditure, and medical expenditure; (3) financial capital and the total amount of livelihood capital were positively affected by the total scale of fiscal expenditure, agriculture, forestry and water expenditure, education expenditure, social security and employment expenditure, and medical expenditure, and negatively affected by general public service expenditure; (4) human capital was positively affected by the total scale of fiscal expenditure, education expenditure, social security and employment expenditure, and medical expenditure; and (5) social capital was positively affected by agriculture, forestry and water expenditure, and education expenditure.

Evaluation on the coupling coordination of economic development and ecological environment carrying capacity: Case study in Jiangxi Province, China

Exploring the relationship between economic development and ecological environment is the inevitable requirement of regional sustainable development. We used an improved entropy method and a coupling coordinated model to assess the comprehensive evaluation index and the coupling coordination degree of economic development and ecological environmental carrying capacity of Jiangxi Province, from 2011 to 2019. Taking 2011 and 2019 as time nodes, this paper analyzed the spatial pattern evolution characteristics of 11 cities in Jiangxi Province. The results showed that: 1) Coordinated development degree presents a growth trend from 2011 to 2019, while the type of coordinated development is constantly shifting to a higher level; 2) the status of coordinated development in 11 prefecture-level cities has generally changed from low and primary to middle and high-level coordination; and 3) the spatial distribution characteristics showed that the coordinated development level in the northern and southern region were higher than the central region, and inter-regional differences gradually narrowed.

Mg-Al Layered Double Hydroxide Doped Activated Carbon Composites for Phosphate Removal from Synthetic Water: Adsorption and Thermodynamics Studies

Increased phosphate concentration in water bodies has led to eutrophication, and its removal is an inevitable requirement of sustainable wastewater purification systems. In this study, MgAl layered doubled hydroxide (LDH) composites doped on the surface of activated carbon (AC/MgAl LDH) with various (Mg + Al) total metal loading (5 wt%, 10 wt%, and 15 wt%) were prepared by the co-precipitation method. The influence of (Mg + Al) total metal loading onto AC was examined to remove phosphate ions from aqueous solutions. The effect of adsorption parameters, including adsorbent dosage, initial solution pH, initial phosphate concentration, contact time, and experiment temperature, were investigated via batch adsorption experiments. The adsorption results demonstrated that the phosphate adsorption capacity significantly improved with increasing the (Mg + Al) metal loading on the surface of AC. The maximum Langmuir phosphate adsorption capacity was 337.2 mg phosphate per gram of AC/MgAl-3 LDH composite (15 wt% Mg + Al) composite at pH ~6.3, 22 °C, and 1 g/L of adsorbent. The kinetic data were best fitted with the pseudo-second order model. The initial solution pH notably influenced the phosphate removal by AC/MgAl-3 LDH composite with a maximum removal at pH 2.3. According to the spent adsorbent characterization results, the dominant mechanisms of phosphate removal by AC/MgAl-3 LDH were electrostatic interactions, ion exchange, and inner-sphere complexation. The phosphate adsorption capacity was gradually increased with increasing the experiment temperature, suggesting an endothermic adsorption process. Overall, the AC/MgAl LDH composites pave the way for an effective strategy for phosphate removal from aqueous solutions.

Exploration of practice and optimization of strategies for conservation of cultivated land resources in contemporary China’s rural areas—Centering on black soil conservation and others

Cultivated land resources are the basic elements for rural development and farmers’ survival in China. Strengthening the protection of cultivated land is an important measure to ensure national food security and practice the strategy of “storing grain in the land and technology”, and it is also an inevitable requirement to promote the high-quality development of agriculture. The protection of cultivated land in contemporary China has gone through three stages: the initial exploration period of reconciliation between economic development and the number of cultivated land, the institutional development period of construction occupation and cultivated land quality management and protection, and the transformation and improvement period of “Trinity” in the new era. In the new era, cultivated land protection has achieved phased results, but it still faces practical constraints from the actors, technical environment, institutional environment and so on. In view of this, we should explore the breakthrough path to further promote cultivated land protection from the aspects of strengthening organizational guidance and technical training, strengthening the top-level design of differentiated cultivated land protection, strengthening the research and development of new technologies and the construction of agricultural technology extension system.

Experimental Study on Compressing and Insulation Performance of Recycled Fiber Concrete

In order to study and explore the related changes of crack resistance, compressive strength and thermal insulation performance of recycled fiber concrete blocks with polyester fiber as the main component. The test blocks were designed and manufactured in the laboratory, three kinds of concrete test blocks with different specifications were obtained after curing for 28 days. Through experiments, three kinds of test blocks with different specifications were tested for thermal insulation performance, crack resistance and compressive strength. With the help of the electronic universal testing machine controlled by microcomputer, relevant data are obtained. The results show that the fiber concrete with polyester fiber as the main component has good crack resistance and thermal insulation performance, which can prevent new cracks and delay the development of cracks in matrix materials to a certain extent. In addition, waste clothes are used as raw materials for research to solves the problems of cost and environmental pollution of traditional fiber concrete, and reduces the pollution of traditional waste clothes treatment. Waste fabric is also a form of waste of social resources. Therefore, rational utilization of this potential huge resource is the inevitable requirement of a conservation-oriented society and a low-carbon life, and the only way for sustainable development.

Research on Sales Prediction of New Energy Vehicles Based on BP Neural Network

Due to the depletion of traditional Chinese renewable energy sources such as crude oil, increased pollution and the endogenous transformation and upgrading of China's economy and society, the flourishing of China's new energy vehicle business is an inevitable requirement for a flourishing low-carbon and green economy. In the context of the global green transformation and the new double-cycle economic development, the flourishing of the new energy vehicle industry is an inevitable requirement for the development of a low-carbon and green economy, and is a necessary path for China to move from a large automotive nation to a strong automotive nation. China's new energy vehicle exports are growing steadily, mainly to Asian and European markets, especially Europe, where a major breakthrough has been made, mainly in the export of pure electric passenger cars and the rise of independent brands. The dividends from new energy vehicles are being used not only for international foreign trade, but also for road dust protection and landmark maintenance.

Understanding of democracy and peace Gershon H.Gordon Faculty of Social Sciences, Tel Aviv University

One of the great changes in the world situation after World War II was the long period of peace without war between democracies and even great powers. However, the world is not easy in the halo of peace. The smoke of local wars such as the Iraq war has not yet dissipated, and frequent terrorist groups is worrying. In Asia, Japan's military influence, which is second only to the United States, cannot be underestimated. Its defense strategy changes from specialized defense to outward defense. This situation brings a new threat to the security of all countries in the Asia-Pacific region. The problem of the "security dilemma" remains one of the major issues in international politics today. In this regard, realism puts forward the theory of potential equalization and deterrence, while liberalism puts forward the theory of world government, collective security, economic interdependence, and democratic peace. Among them, democratic peace theory, as a popular theory in the field of western international relations research, has aroused wide controversy in the academic circles. "Democratic peace theory" believes that there is no or little war between democratic countries, and "non-democratic countries" are the root cause of war, and expanding democracy is the inevitable requirement for maintaining peace. "Democratic peace theory" does not conform with historical facts, it is the theoretical basis for neo-interventionism in promoting human rights diplomacy. The relationship between democracy and peace is complex: peace between international society and international relations requires not only a domestic democracy, but also in international life; democracy is only one of the many reasons affecting international peace, It has limited impact on peace; the "democracy peace theory" advocates established peace is essentially local peace between western countries based on unreasonable international political and economic order, the consolidation of overall world peace and the establishment of just and reasonable new international order call for new democracy.

Spatio-Temporal Evolution Law of Surface Subsidence Basin with Insufficient Exploitation of Deep Coal Resources in Aeolian Sand Area of Western China

Coal is one of the fundamental fossil energy supporting the world’s economy. The synergistic development between efficient coal mining and ecological environment protection is the inevitable requirement for the preservation of global harmony. As the world’s largest coal producer, China has conducted a strategic shift from east to west in terms of the exploitation of its energy resources, posing a serious threat to the fragile ecological environment of the western region. In particular, the surface subsidence caused by coal mining is the root of the ecological deteriotation and the destruction of ground structures. However, it is difficult to reveal the law of large-scale surface subsidence in western mining areas merely by conventional measurement methods such as leveling, on account of the high intensity of coal seam mining, the weakness of the lithology of overlying rock and the large thickness of wind-blown sand strata. In view of this, small baseline subset interferometric synthetic aperture radar (SBAS-InSAR) technology was used in this study to obtain the time series of surface vertical displacement during the whole mining process of the 2401 working face in the Yingpanhao coal mine, Inner Mongolia. Based on the deformation data, the dynamic evolution characteristics of surface subsidence under high intensity mining in the western mining area were analyzed exhaustively. It was found that the surface subsidence is characterized by an extensive coverage range (48.52 km2) with minimal ground settlement (250 mm) in the study area. Meanwhile, the boundary shape of the subsidence basin followed a “circular-parallelogram-trapezoid” changeable process and the coverage area of the basin experienced three stages: a linear increasing period, a temporary stagnation period, and a re-expansion period. Furthermore, there existed an abnormal uplift phenomenon on the east side of the open-off cut in the 2401 working face. Combined with the structure of overlying strata, this paper carried out a preliminary analysis on the reasons of the abovementioned phenomenon. The research results are of vital realistic significance for ground buildings and ecological environmental protection in the aeolian sand mining area in Western China.

Construction of Virtual Simulation College Students Innovation and Entrepreneurship Platform Using Internet of Things Technology

IoT technology originated from the third scientific and technological revolution, which refers to the connection of objects and networks through information sensor devices according to an agreed protocol. It communicates and circulates information through the information dissemination medium during the connection process to achieve smart recognition, supervision, and other functions. The Internet of Things is to interconnect all items with the Internet through radio frequency identification, infrared sensors, global positioning systems, laser scanners, and other sensing equipment according to the agreed communication protocol. It is a kind of network that realizes intelligent identification, positioning, analysis, monitoring, and management. The development of virtualization technology promotes the development of educational computers, and the reform of basic education curriculum promotes the profound reform of science education. It is also an inevitable requirement for cultivating talents with scientific culture and innovation ability. Virtual simulation technology is the product of combining simulation technology and virtual reality technology on the basis of the rapid development of information technology such as multimedia technology, virtual reality technology, and network communication technology. This paper is aimed at studying the construction of a virtual simulation college student innovation and entrepreneurship platform based on the IoT technology. This paper takes college students as the research object, and according to the application characteristics of local higher education institutions, establishes a systematic training platform for college students’ innovation ability to improve students’ innovation and entrepreneurship ability. This paper shows that the proportion of students’ innovative ability is as high as 56%, and the proportion of innovative activities organized by schools is as high as 70%. Students are generally not very motivated to innovate.

Metal-N/P coordination assisted construction of robust heterointerface for stable and superior-rate electrodes in battery-type supercapacitors

Holding ultralong cycle life and superior rate capability with high specific capacity is an inevitable requirement for the practical applications of transition metal compounds battery-type supercapacitor electrode materials. In this paper, a novel class of transition metal phosphide (TMP) nanostructures evenly bonded on N/P co-doped graphene nanotubes (N/P-GNTs@b-TMP) is firstly built via one-step in-situ growth procedure. The N, P elements as substitutions of C in GNTs skeleton introduce rich electronic centers, further change the surface electronic structures of the skeleton, inducing the TMPs to anchor the surface of N/P-GNTs through metal-N and metal-P bonds, which is demonstrated by the characterizations and Density functional theory (DFT) calculation. The unique chemical bonding can not only reinforce the integration of the hybrid electrode materials during durable cycling, but also generate the typical internal electric field and greatly reduce the free energy of the reaction system, endowing a superior rate capacity and easy redox process relating to high specific capacity. Moreover, ex-situ impedance and capacitive/diffusion control analysis suggest the fast ions diffusion behavior and reaction kinetics. Benefiting from the unique architecture, the achieved N/P-GNTs@b-NiCoP positive electrode possesses high specific capacity of 250 mAh g−1 (1800 F g−1) at 2 A g−1 and 166 mAh g−1 (1200 F g−1) at 50 A g−1. Meanwhile, the N/P-GNTs@b-Fe2NiP and N/P-GNTs@b-FeCoP negative electrodes constructed by the same approach can also own a high specific capacity of 151.9, 159.7 mAh g−1 (547, 575 F g−1) at 1A g−1 and 63.6, 73.6 mAh g−1 (229, 265 F g−1) at 50 A g−1, respectively. More significantly, they all can present ∼90% capacity retention after 75000 cycles, which can be comparable to all of the reported transition metal compound electrodes even commercial carbonaceous materials. In addition, an asymmetric supercapacitor (ASC) using the achieved N/P-GNTs@b-NiCoP as electrode expresses a remarkable energy density of 77.8 Wh kg−1 and cycling stability. This work provides an innovative structural design strategy for obtaining battery-type supercapacitor electrode materials with commercial application prospects.

The effectiveness of a water resource tax policy in improving water-use efficiency: a quasi-natural experiment-based approach

Abstract Comprehensively improving the efficiency of water resource utilization is not only an urgent need to resolve the prominent contradiction between water supply and water demand but also an inevitable requirement to promote the harmonious coexistence between humans and nature. The compulsory water resource tax is considered to be a powerful tool for resolving the worldwide water crisis and improving water resource utilization efficiency (WRUE). Based on a quasi-natural experiment of water resource tax policy in China, this study used panel data for 30 provinces (municipalities) from 2011 to 2019 to evaluate the impact of water resource tax policies on WRUE through a multistage difference-in-difference model. The results showed that the water resource policy can effectively improve the utilization efficiency of water resources by optimizing the allocation of resources. In addition, the analysis of the spatial heterogeneity showed that the policy of the water resource tax has a stronger lifting effect on improving water resource-use efficiency in eastern China than that in the central and western regions. This research provided insights into China's water policies that can be used to better manage natural resources.

Evolution of mining stress field and the control technology of stress relief gas in close distance coal seam

The prevention and control of stress relief gas have crucial influence on safety of coal mine, it is not only the inevitable requirement of safe production, but also an effective way to realize reasonable utilization of gas. Taking the 1103 working face of the Weijiadi coal mine as the background, the mining stress field was analysed by means of numerical simulation, theoretical analysis and field practice, and the control technology of stress relief gas was studied. The results showed that scope of stress relief zone drops gradually associated with an increase of distance from the roof (or floor) to the working face. Additionally, the shape of the stress relief body exhibited a ring-shaped distribution, while four corners of the goaf roof and floor underwent high permeability zones due to a deep stress relief body, where the permeability of two corners near the transportation roadway of the floor was higher. The results provided good information for W-shaped ventilation mode with two inlets and one return which was adopted in the working face. More importantly, the optimized layout of boreholes was put forward, which eventually were useful for solving the gas overrun of the working face. The technology used in 1103 working face has an attractive and practical background with other extensive applications for the prevention and control of relief gas.

Research on the Inheritance of Miao Costume Culture Based on Digital Wireless Communication Technology

The protection of the popular culture of local ethnic minorities is an inevitable requirement for building a multicultural system. Through the latest digital technology, through the Internet, digital images, and other technologies, traditional cultural resources are classified and integrated, so that they can be inherited. The purpose of this study is to study the cultural heritage of digitized Miao costumes. This paper introduces the background and importance of the digital protection of Miao costume culture, analyzes in detail the current situation of Miao costume culture, the application of digital protection technology at home and abroad, and analyzes and organizes the research content that introduces the importance of digital protection of Miao costumes. Provide real data support for clothing culture protection. Collect relevant data through questionnaire survey, conduct quantitative statistical analysis, and study the impact of modern cultural communication tools such as television, mobile phones, and the Internet on the inheritance of Miao costume culture under the digital background. The results showed that only 5 of the 216 people were reluctant to use digital dissemination of Miao costumes.

Research on the Mining of Intangible Cultural Heritage Digital Resources in the Manual Online Teaching System of Preschool Education.

Our country's international status as a cultural power has been further enhanced, and the protection of intangible cultural heritage containing the essence of traditional culture is also gradually being carried out. In addition, with the rapid development of the digital environment, the public's cultural needs continue to grow, and the contradiction between the supply and demand of public digital cultural services continues to intensify. Converting intangible cultural heritage into digital form for protection and providing resource services for the public has become an important trend in the protection and inheritance of intangible cultural heritage at home and abroad, and it is also an inevitable requirement to solve the contradiction between supply and demand. Improving public cultural services is one of the key projects. At present, our country's research and practice of intangible cultural heritage digitization and services are also in progress, but there is no research on intangible cultural heritage digital resource services and system construction from the perspective of information service elements. Based on the digital resource service of intangible cultural heritage, the manual course is one of the main skill courses for preschool education majors. At this stage, the short class hours of manual courses, the lack of class hours, the low utilization rate of teaching materials, and the disconnection between the content and the needs of the kindergarten are all problems that need to be solved at present. Just relying on cross-references between schools, the manual knowledge and skills mastered by graduates are not comprehensive enough to complete the manual tasks assigned by the kindergarten. This paper implements the concept of intangible cultural heritage and hopes that by studying the manual knowledge and skills that today's kindergarten teachers need to possess, the content of existing manual courses can be adjusted in a targeted manner, so that the electronic culture dissemination of manual curriculum resources for preschool education is more reasonable, meeting the requirements of kindergarten teachers in terms of manual knowledge and skills.

Intelligent Big Data Framework for the Technical Design of Public Management Applications in Sports

Public sports services (PSS) are an important element in the development of China’s public service industry and promoting theoretical research on PSS at the present time has just become an inevitable requirement for the development of sports. The main purpose of the work in this paper is the study of public management data in sport through intelligent big data analysis, with the participation of knowledge graphs, migrating relevant algorithms from other application areas, and optimizing them on this basis. It provides an objective review and analysis of the weaknesses of current sport public management research, etc. Based on informative data sources and in-depth theoretical analysis, it provides an objective description and analysis of the current situation of the development of sport public management services and an outlook on the future development of public sport services.

Research on the Reform Path of Professional Title System of Human Resource Management in the New Era

Human resource management professionals are an important part of professional and technical personnel, and an important force to promote the high-quality development of social economy. Strengthening human resources management reform of professional title system, implement the central personnel work, such as the embodiment of the important conference spirit, to speed up the human resource service industry plays an important role in promoting the healthy development and the inevitable requirement of unit of choose and employ persons, promote efficiency of management of human resources, enhance human resource management professional sense of belonging. However, a new era of human resources management system of professional title reform faces four big problems: 1) evaluation standard is not scientific, 2) the single evaluation way suits inadequate, 3) the inefficiency of streamlining administration, delegating powers, improving regulation, and 4) strengthening services, weak publicity. So this article suggested from four aspects, to construct scientific and effective reform path of professional title system of human resource management: 1) establish scientific evaluation standards, 2) innovative judging methods, 3) improve the level of review management services, and 4) increase publicity.

Virtual Reality-based Internet + Smart Classroom

<p>With the deep development of Internet +, it is necessary to actively explore the deep integration of Internet + and classroom teaching and build a smart classroom, especially in the courses that require thinking training. The urgency is mainly reflected in three aspects: First, the trend of the times; Second, the inevitable requirement of education reform; and third, the urgent need for practical teaching. This paper shows that VR-based experiments are effective through teaching experiments on fast sorting algorithms difficult for junior high school students to understand in information courses. According to the experimental results, firstly, students who used VR teaching to assist applied learning had better academic performance than students who used traditional teaching methods. Second, students who learn using VR teaching-assisted applications present better learning attitudes than students who use conventional teaching methods. Third, the cognitive load of students using virtual reality teaching aids is lower than that of traditional teaching methods.</p> <p> </p>

Research on water resources pricing model under the water resources–economic high-quality development coupling system: a case study of Hubei Province, China

Abstract Achieving high-quality economic development under the new development pattern has become an inevitable requirement for China's economic development. Correctly calculating the value of water resources and optimizing the price mechanism of water resources is one of the important guarantees for promoting the high-quality development of the regional economy. Based on this fact, this paper takes Hubei Province as an example to construct a coupling relationship model between water resources and economic high-quality development and to evaluate the coupling coordination between the two. And then, the fuzzy comprehensive evaluation model is used to evaluate the value of water resources in Hubei Province, and recalculate its water price. The results show that Hubei province now is a lagging development of water resources, and the current water price is far lower than assessed. The government should improve the mechanism of water price which should be driven by innovation to adjust the water use structure, finally achieve high-quality economic development of Hubei Province.

An Improved GM(1,1) Model of Marketization of Forest Ecological Compensation based on Health-Cultivation Industry

In the context of supply-side structual reform, the marketization of forest ecological compensation is an inevitable requirement under the market economy. The forest health-cultivation industry, which explores the new method to utilize the forestry resources, is a new direction of forestry firms and is the production of supply-side structural reform. From the perspective of forest health-cultivation industry, this essay explores the possibility of the marketization of forest ecological compensation based on forest health-cultivation industry, and predicts the willingness of people to pay for the ecological service by using the original number of tourists in forestry tourism and leisure industry tourism between 2010 and 2015 and adopting the improved GM (1,1) model. The result shows that people’s willingness is increasing. It is predicted that, by 2023, the number of tourists in forestry tourism and leisure industry tourism will reach 8.98 billion. The development of forest health-cultivation industry has introduced the market mechanism for forestry development, which makes up for the deficiency of the existing compensation mechanism characterized by low compensation standards and single channel of funding. The increase of people’s demand for ecological tourism and the boom of forest health-cultivation industry which provide a new opportunity for the marketization and diversification of forest ecological compensation mechanism.