Yulin Region Research Articles

Mid to late Holocene climate changes and grazing activities in northern Loess Plateau, China

Despite the importance of pastoralism, as an alternative or adjunct to farming in China's long history, a clear understanding of the spreading routes and mechanisms of pastoralism in China is lacking. Fungal spores can be a useful addition to zooarchaeological evidence and have been widely used to explore the origins and development of pastoralism in different regions of the globe. The northern Loess Plateau is one of the most important areas for the emergence and development of pastoralism in early China. The aim of this paper was to take the fungal spores in the Baihemiao (BHM) core that we extracted from a site in the Yulin region, combine them with the zooarchaeological records to explore their relationship with climate and environmental changes, and reconstruct the evolution of animal husbandry in the northern Loess Plateau since the mid-Holocene. The results indicate that the climatic conditions in the northern Loess Plateau during the first period of 6–4.2 ka were relatively humid, the number of domesticated herbivores was small, animal husbandry was not developed, and the spores of coprophilous fungi in the sediments mainly originated from wild herbivores. Fungal spores as well as zooarchaeological evidence reveal that cattle and sheep grazing developed rapidly in the region during the second period, c. 4.2–3 ka. We suggest that the arid climatic conditions during this period facilitated the development of pastoral activities in the northern Loess Plateau. However, this pastoral economy gradually weakened after 1.2 ka.

Rapid detection method of bacterial pathogens in surface waters and a new risk indicator for water pathogenic pollution

In this study, a accurate, rapid quantitative PCR method for the simultaneous detection of 4 kinds of pathogenic bacteria in water was established, and the distribution of pathogenic bacteria in surface waters with different levels of pollution (Yulin region, China) was detected. The results showed that the detection accuracy was 94%; the detection limit was 2.7 in bacterial cells. Salmonella enterica subsp. enterica serovar typhimurium and Salmonella dysenteria were always present in water when the universal primer for pathogenic bacteria abundance detection was greater than 104 copies 100 mL−1. When the detection value is lower than 104 copy 100 mL−1, the bacteria in the water are rarely pathogenic bacteria, so the detection value of 104 copy 100 mL−1 can be used as a new indicator of waterborne pathogen pollution.

榆林地区精神分裂患者发病与出生季节、发病季节及气候的相关性

榆林地区精神分裂患者发病与出生季节、发病季节及气候的相关性

A new water allocation scheme considering the optimization of industrial structures in arid areas of the Chinese Loess Plateau

Study regionThe Yulin Region in the Northern China. Study focusThere is an urgent need to balance supply and demand in respond to water shortages in arid and semi-arid areas. A new water-adaptable allocation framework is used to simulate different allocation scenarios. Firstly, the supply-demand was analyzed to determine whether an imbalance existed. Then, the structure of grain and energy of Yulin was optimized. In order to produce new water-adaptable boundary of industry demand. Finally, the allocation of water resources was optimized based on the target of minimizing the water shortage rate. New hydrological insights for the regionThe new scheme results highlight that by 2025, it is predicted that in a BAU (business as usual) scenario, there will be an imbalance between the water supply and water demand in Yulin Region. Following the optimization of the grain and energy industrial structure (GES), and the WAS (water allocation and simulation) model used to create a water resources allocation scheme and tested its applicability using two rainfall guarantee rates scenarios, it was determined that the total water demand established for the both scenarios decreased, and the economic benefit increased by 12.43 %. Also, 87.41∼99.93 % of potable water is satisfied to the initial water needs.

The frequency of HKαα allele in silent deletional α-thalassemia carriers in the Yulin region of southern China using the third-generation sequencing

Objectivesα-thalassemia is relatively prevalent in Yulin Region in southern China. In order to accurately detect α-globin gene aberrations for genetic counseling, the prevalence of HKαα (Hong Kong αα) allele in this subpopulation of silent deletional α-thalassemia were examined. Materials and methodsA total of 1845 subjects were selected in Yulin Region from January 2021 to March 2021. Peripheral blood was collected from each participant for routine genetic analysis of thalassemia. The HKαα allele was determined using the Single-molecule real-time (SMRT) technology for samples with -α3.7/αα, βN/βN genotype. ResultsTwo samples were identified with HKαα allele from 100 samples with -α3.7/αα, βN/βN genotype. The frequency of HKαα allele was 2.0 % (2/100) in -α3.7/αα, βN/βN carriers in Yulin Region. One sample was identified with a novel variant of the α-globin gene cluster named αHKαα by SMRT technology. One rare HBA2 variant and six HBB variants were found by SMRT technology, including -α3.7/HBA2:c.300 + 34G > A, HBB:c.316-45G > C/βN, HBB:c.315 + 180 T > C/βN, HBB:c.316-179A > C/βN. ConclusionA certain proportion of HKαα allele had been detected in Yulin Region. SMRT technology plays a crucial role for improving the diagnostic accuracy and positive detection rate of thalassemia. The completion of this study has great meaning for strengthening the prevention and control of thalassemia in Yulin Region.

Landscape ecological risk assessment of Yulin Region in Shaanxi Province of China

Landscape ecological risk assessment of Yulin Region in Shaanxi Province of China

The dynamic identification mechanism research of drought based on process description

Abstract Drought is one of the most common natural disasters, which can cause heavy losses on a global scale. Strengthening the research on drought identification mechanism has an important guiding role in drought disaster prevention and mitigation. The current drought identification is mostly static in the process of drought, and there is a problem that the historical evaluation information and the drought prediction information are not closely combined, with limited application value. Based on the physical cumulative and recessional effects of drought events, this paper further uses the Standardized Precipitation Index (SPI) to divide the whole drought process into four stages: accumulation → outbreak → reaction → restoration. In addition, this study proposes a new dynamic identification mechanism based on drought process, and develops a drought prediction model combining singular spectrum analysis and BP neural network (SSA-BPNN), filling the gap between scientific research and practical application. Using three drought events in the Yulin region of China as examples for simulation studies, the results show that the use of the new mechanism can not only improve the application value of the SSA-BPNN model, but also effectively advance the drought preparation time and resistance level.

The Study for Public Management Policy Utility Evaluation and Optimization System under the Framework of Social Computing Perspective

In recent years, in order to rationalize the allocation of social resources and optimize the implementation of public management policies, scholars have conducted in-depth researches on policy effectiveness. However, at present, most of the study is still at the level of using macrolevel qualitative analysis, and lack of quantitative analysis and evaluation system for the effectiveness of policy implementation. The goal of this article is to discuss the utility evaluation system of public management policy from the perspective of social computing. First, based on the data obtained through questionnaire survey, we obtain indicators of the survey data by using factor analysis, and a new BDI (belief–desire–intention) model is created based on the observation indicators, and then the simulation platform is constructed; then, a brand new quantitative analysis method for policy optimization is proposed by using modified logistic functions as a tool. As application, we conducted the case study for the “Targeted poverty alleviation policy in Yulin region” (Guangxi, China), in which the key indicators for the poverty were established, and then the policy optimization suggestions were given based on the results of simulation experiments. This case study has Chinese characteristics, which might be applied to the poverty alleviation work globally.

Evaluation of Landscape Ecological Integrity in the Yulin Region, China

We developed a framework and an index to evaluate landscape ecological integrity. The framework was applied to the Yulin region (Shaanxi Province, China) to evaluate its overall ecological integrity and the effect of the Grain for Green Project on landscape ecological integrity. Landscape ecological integrity (LEI) is the ability of an ecosystem to maintain its self-organization capacity, stability, and diversity in structure and function. A landscape having high ecological integrity has three major characteristics: complex structure, high self-organization capacity, and a high level of stability. The LEI can be evaluated using five indicators: landscape fragmentation, connectance, ecological sensitivity, diversity, and vegetation productivity. The results indicate that the LEI in the Yulin region was relatively low during the period from 2000 to 2015. From 2000 to 2005, areas of very low and low LEI decreased, and areas of moderate and high LEI increased. From 2005 to 2010, areas of low and high LEI decreased, and areas of moderate LEI increased. Furthermore, from 2010 to 2015, areas of very low and low LEI increased, and areas of moderate and high LEI decreased. Overall, the LEI of the region was low, but increased between 2000 and 2010, and decreased between 2010 and 2015. On the basis of these findings, we conclude that the Grain for Green Project in the Yulin region has been successful in improving regional LEI.

Molecular characterization of α- and β-thalassemia in the Yulin region of Southern China

Thalassemia is one of the most common hereditary blood disorders. Epidemiological data regarding the prevalence and distribution of mutations is important for planning a thalassemia control program. To reveal the prevalence of thalassemia and mutation spectrum in the Yulin region of southern China, we screened 130,318 individuals from Yulin region by hematological and genetic analysis. Totally, 24,886 (19.10%) subjects were diagnosed with thalassemia, including 16,308 (12.51%) subjects with α-thalassemia alone, 6658 (5.11%) subjects with β-thalassemia alone and 1920 (1.47%) subjects with both α- and β-thalassemia. Ten α-thalassemia mutations were identified in the α-thalassemia subjects, with the common α-thalassemia mutations being --SEA mutation (51.91%), -α3.7 (19.90%), αCSα (10.58%), -α4.2 (8.13%), αWSα (7.67%). Thirteen β-thalassemia mutations and 31 genotypes were characterized in the β-thalassemia subjects. The seven common mutations [CD41–42 (-CTTT) (43.31%), CD17 (A > T) (34.58%), CD26 (G > A) (6.86%), CD71–72 (+A) (4.25%), -28 (A > G) (3.90%), IVS-II-654 (C > T) (3.53%) and IVS-I-1 (G > T) (2.22%)] accounted for 98.65% of all β-thalassemia defects. Furthermore, 6 cases of α-triplication and 3 cases of mutation -α2.4 were first identified in this region. Our data illustrated that there was great heterogeneity and extensive spectrum of thalassemias in the Yulin populations. The findings will contribute an available reference for prevention of thalassemia in this region.

Study on indoor thermal environment in winter for rural residences in Yulin region

Yulin region is located in the northern part of Shaanxi Province, China. The winter here is very cold and it has a long duration. In this paper, a rural residence which was located in Yulin region was taken as a study object. Indoor thermal environment of the rural residence were tested, including indoor air temperature and air relative humidity. Then, test data were analyzed. It was summarized that indoor thermal environment of test room can not fully meet human thermal comfort needs, and some tactics of regulation building thermal environment were proposed. This research contributes to improvement of indoor thermal environment for local rural residences and it provides reference for rural residences in other cold regions.

Study of the Distribution of Chronic Fatigue Syndrome and Physical Tests Situations in the Middle School Students in Yulin Region

This article uses the questionnaire survey to the Yulin region 12 senior high school students to carry on the sampling survey. Results: Yulin region CFS detection rate was 3.67%, 12 senior high school boys girls CFS detection rate was 4.32%, the girls CFS detection rate is more than boys. Conclusion: Yulin area middle school high school students of CFS detection rate is higher, and the community fitness testing results the success rate lower, CFS is likely to be the students' physical fitness test is one of the main reasons for not up to standard.

Renewable energy integration capacity assessment in regional power grid based on an enhanced sequential production simulation

As the scale of renewable energy increases significantly, the renewable energy integration will gradually become the key issue in urgent need of a solution for Shaanxi power system. To tackle such a new situation, this study proposes an innovative method for accessing the renewable energy integration capacity of Shaanxi power system during the next ‘Five-Year Plan’ period. First, an in-depth study of the power demand, load characteristics, renewable energy as well as their output characteristics is performed. Then, the maximum wind and solar power integration capacity is simultaneously calculated based on an enhanced sequential stochastic production simulation in consideration of several boundary conditions of Shaanxi power system such as power supply, network constraints and future load. Finally, the influence of electric heating scale in Yulin region on the renewable energy integration capacity of Shaanxi power system is further studied. Through such analysis, this study attempts to provide decision support for a reasonable renewable energy development scale and power grid plan.

Early Devonian graptolites from the Qinzhou–Yulin region, southeast Guangxi, China

Early Devonian graptolites are widely distributed within the 30°N and 30°S parallels of paleolatitude, with only a few known locations outside the 30° parallel. Only three early Devonian graptolite locations, i.e., west Yunnan, southeast Guangxi (in low paleolatitude), and south Xizang (Tibet) (in middle-high paleolatitude), have been reported in China. An Early Devonian graptolite fauna of moderate diversity, including three genera and 14 species, is described from the Qinzhou–Yulin region in southeast Guangxi, China, including Uncinatograptus jadae sp. nov. and Neomonograptus aequabilis latus subsp. nov. Based on these taxa, four biozones, the Uncinatograptus uniformis Biozone, the tentative Uncinatograptus praehercynicus Biozone, the tentative Neomonograptus falcarius Biozone, and the Uncinatograptus yukonensis Biozone, are erected in ascending order. The Lower Devonian graptolite biozonation in Guangxi agrees with the global standard. However, the graptolite biodiversity below the Uncinatograptus yukonensis Biozone in the Qinzhou–Yulin region is lower than those of the other parts of the world. In the present study, the tentatively recognized Neomonograptus falcarius Biozone has only the index species. In the study region, the species Uncinatograptus hercynicus (Perner) is absent. Thus, we tentatively employ the Uncinatograptus praehercynicus Biozone as a possible substitute for the Uncinatograptus hercynicus Biozone.

Analysis of government behaviors in county public hospital reform in Yulin of Shaanxi

An investigation was made on reforrs of connty public hospitals in Yulin region,Shaanxi province.With theories of public administration,the authors probed into the government investment behavior in county-level public hospitals reform,hospital operation mechanism,and govemmem regulation,as well as multi-sector involvement in healthcare services Proposals made in the paper advocate constructing a responsible and limited service-based government in the county-level public hospitals reform. Key words: County public hospitals; Reform; Govennment behavior; Service-based government

The relative role of climate change and human activities in the desertification process in Yulin region of northwest China

To overcome the shortcoming of existing studies, this paper put forward a statistical vegetation-climate relationship model with integrated temporal and spatial characteristics. Based on this model, we quantitatively discriminated on the grid scale the relative role of climate change and human activities in the desertification dynamics from 1986 to 2000 in Yulin region. Yulin region's desertification development occurred mainly in the southern hilly and gully area and its reverse in the northwest sand and marsh area. This spatial pattern was especially evident and has never changed thoroughly. From the first time section (1986-1990) to the second (1991-1995), the desertification was developing as a whole, and either in the desertification development district or in the reverse district human activities' role was always occupying an overwhelmingly dominant position (they were 98.7% and 101.4%, respectively), the role of climate change was extremely slight. From the second time section (1991-1995) to the third (1996-2000), the desertification process was reaching a state of stability, in the desertification development district the role of climate change was nearly equivalent to that of human activities (they were 46.2% and 53.8% separately), and yet in the desertification reverse district, the role of human activities came up to 119.0%, the role of climate change amounted to -19.0%. In addition, the relative role of climate change and human activities possessed great spatial heterogeneity. The above conclusion rather coincides with the qualitative analysis in many literatures, which indicates that this method has certain rationality and can be utilized as a reference for the monitoring and studying of desertification in other areas.

8700 Subclinical systemic disease and relapse pattern in primary central nervous system lymphoma (PCNSL)

Thalassemia is one of the most common hereditary blood disorders. Epidemiological data regarding the prevalence and distribution of mutations is important for planning a thalassemia control program. To reveal the prevalence of thalassemia and mutation spectrum in the Yulin region of southern China, we screened 130,318 individuals from Yulin region by hematological and genetic analysis. Totally, 24,886 (19.10%) subjects were diagnosed with thalassemia, including 16,308 (12.51%) subjects with α-thalassemia alone, 6658 (5.11%) subjects with β-thalassemia alone and 1920 (1.47%) subjects with both α- and β-thalassemia. Ten α-thalassemia mutations were identified in the α-thalassemia subjects, with the common α-thalassemia mutations being --SEA mutation (51.91%), -α3.7 (19.90%), αCSα (10.58%), -α4.2 (8.13%), αWSα (7.67%). Thirteen β-thalassemia mutations and 31 genotypes were characterized in the β-thalassemia subjects. The seven common mutations [CD41–42 (-CTTT) (43.31%), CD17 (A > T) (34.58%), CD26 (G > A) (6.86%), CD71–72 (+A) (4.25%), -28 (A > G) (3.90%), IVS-II-654 (C > T) (3.53%) and IVS-I-1 (G > T) (2.22%)] accounted for 98.65% of all β-thalassemia defects. Furthermore, 6 cases of α-triplication and 3 cases of mutation -α2.4 were first identified in this region. Our data illustrated that there was great heterogeneity and extensive spectrum of thalassemias in the Yulin populations. The findings will contribute an available reference for prevention of thalassemia in this region.

The study of land desertification in transitional zones between the MU US Desert and the Loess Plateau using RS and GIS?a case study of the Yulin region

In this study, the land desertification of transitional zones of desert loess in the Yulin region (China) is studied from TM images in a geographical information system (GIS). It is found that the desertification in Yulin is still severe. The desertified land accounts for 67.7% of the total land areas. The distribution of desertified land shows obvious spatial imbalance, with severe desertification in northwestern regions and slight desertification in southeastern regions. This imbalance is related to the difference in physical factors and land-use pattern. The process of desertification in Yulin areas shows a steady and even reversed trend between 1987 and 1999, as a result of positive efforts. At the end of the paper the cause of desertification is discussed. It is believed that the interaction and confliction between the natural process and human activities may lead to the development of desertification.

Wenlock, Ludlow, and Pridoli? graptolites from Yulin, Guangxi, China

Late Wenlock and Ludlow transition graptolites are better developed and more diverse in the Yulin region of Guangxi Province, South China, than elsewhere in China. The upper Homerian (upper Wenlock) graptolites, while moderately diverse, are not amenable to a zonal subdivision because key species such as Colonograptus praedeubeli, Colonograptus deubeli, and Colonograptus ludensis are found to completely overlap in their occurrences. Ludlow graptolites, all probably assignable to the lowest Ludlow nilssoni–colonus Biozone, include Lobograptus progenitor, Colonograptus colonus, Colonograptus gerhardi, and Bohemograptus bohemicus (sensu lato). The single occurrence of Monograptus cf. rectiformis Príbyl is the only species suggestive of Pridoli-age strata. The overall faunal assemblages are composed predominately of cosmopolitan species, but two species, Colonograptus gerhardi and Monograptus cf. rectiformis, provide minor support for the suggestion that the Yunkai Block in which the Yulin region is situated was originally part of Gondwanaland.

The evaluation of eco-environmental susceptibility to human activity in Yulin region

The eco-environmental susceptibility is to demonstrate the reaction of a ecosystem under the same influences of the human activity. It comprise many influencing factors which have a complicated relation to the eco-environmental susceptibility. In this paper, the Analysis of Hierarchy Process (AHP) is used to determine the weight of each factor to the eco-environmental susceptibility through analyzing the relationship between human activity and environmental deterioration. And the weighted summation method is used to calculate the eco-environmental susceptibility of different divisions in Yulin region. The result shows that the loess hilly and gully area is more subjective to deteriorating eco-environment than the desert area because of the strong human activity and severe soil erosion.