1,116 research outputs found
GIS-Based Synthetic Measurement of Sustainable Development in Loess Plateau Ecologically Fragile Area—Case of Qingyang, China
No full textSynthetic measurement of regional sustainable development has been one of the key issues in the research field of sustainability. In this paper, Qingyang City located in the Loess Plateau ecologically fragile area of Northwest China is used for a case study, and the present study aims to investigate the degree of sustainable development by conducting temporal- and spatial-scale based analysis, with the assessment index system, assessment model and GIS approach well integrated. The results show that the development pattern of Qingyang generally fits the mode of unsustainable development, even in the presence of certain levels of spatial differences. The sustainable development state in ecologically fragile area of China’s Loess Plateau is non-optimistic, which is an uncoordinated status among subsystems of regional sustainable development. Although the level and tendency of regional sustainable development keeps increasing, such enhancement is abnormal. With the rapid deterioration of environmental and natural resources, their inhibitory effect on the economy and society would expand, eventually leading to the slow development rate or the recession of the entire system. The only solution is to change the traditional mode of economic development, to follow the guide of ecological economic conception so that the goal of achieving regional sustainable development strategies could be met ultimately. Meanwhile, the characteristics of different regions should be taken into account in order to achieve optimal spatial structure
Analysis and Improvement of Emergency Mechanism for Hazardous Chemicals Accidents in Qingyang City
No full textIn recent years, with the rapid development of the economy, the dangerous chemicals enterprises in Qingyang City have also expanded and developed rapidly. The development of hazardous chemicals enterprises is increasing, the factors of instability are increasing, and the frequency of accidents involving hazardous chemicals is also increasing. While hazardous chemicals companies bring benefits, they also bring a serious threat to human life, health and property security. As a city with more dangerous chemicals companies, Qingyang has many potential safety hazards. In order to cope with many pressures, the Qingyang Municipal Government is vigorously carrying out safety production inspection and emergency mechanism construction in the hazardous chemicals industry. This paper analyzes the problems and deficiencies in the emergency management mechanism of Qingyang City from the aspects of accident prevention and early warning, emergency response, emergency plan preparation and emergency drill, which are mainly reflected in the weak foundation of accident early warning, imperfect laws and regulations, and weak awareness of public participation in emergency management. Finally, through the analysis of the existing problems and deficiencies, the emergency mechanism of Qingyang dangerous chemicals accident is improved
Location of the renovation project of Wenjia Street in Qingyang District, Chengdu City.
No full textLocation of the renovation project of Wenjia Street in Qingyang District, Chengdu City.</p
Evaluating spatial equity in bike share systems
No full textThis research analyzes 10 of the largest third generation docked bike share systems in the United States along with 3 docked bike share systems in New Jersey. These bike share systems were carefully selected to reflect diversity in their size and age, and their host region’s size and geography as well as data availability.This report was developed by the New Jersey Bicycle and Pedestrian Resource Center within the Alan M. Voorhees Transportation Center (VTC) at Rutgers, The State University of New Jersey. The research team included Charles T. Brown, MPA, Principal Investigator, Devajyoti Deka, PhD, Aashna Jain, Anish Grover, and Qingyang Xie. The Center is supported by the New Jersey Department of Transportation through funds provided by the Federal Highway Administration
A heterogeneous-agent model with district-level constraints: an application to livestock development in Gansu, China
No full textThis paper develops a heterogeneous-agent model to assess the impacts of removing lucerne growing subsidies, increasing livestock numbers and including district-level equilibrium conditions on optimal farm plans in the Qingyang district of Gansu Province, China. The model is a five-year dynamic linear program that solves across 96 farm households whilst incorporating district-level constraints. The approach used allows us to observe seasonal variations in incomes, infer the distribution of a policy shock among households and highlight trade patterns at the district level. The results suggest that without lucerne growing subsidies the total area of lucerne grown by all modelled households falls by 18%. Increasing livestock numbers by 25% reduces net household incomes by 17% as changes to labour allocations reduce off-farm employment opportunities. When external trade in forages is included in the model, total livestock numbers held by all 96 households rise from 502 to 838, this highlights the benefits of integrated feed markets. Shadow prices for crop production rise when livestock numbers increase, implying that benefits exist to improving crop yields.Heterogeneous-agent model, district-level constraints, livestock, China., Farm Management,
Enzootic situation and molecular epidemiology of <i>Brucella</i> in livestock from 2011 to 2015 in Qingyang, China
No full textA large-scale survey was conducted in domestic animal populations from 2011 to 2015 in Qingyang, China. A total of 448,398 animals from different districts of Qingyang were tested for the presence of Brucella-specific antibodies using the Rose Bengal Plate Test (RBPT) and the Standard Agglutination Test (SAT). From 2011 to 2015, the yearly average positive rates were between 0.04 and 4.75% in the eight counties tested. In addition, the prevalence rates were between 0 and 9.96% in these eight counties. Sheep was the dominant host of Brucella in Qingyang, and the prevalence rate in sheep (2.74%) was higher than those in the other animals tested. Identification of 10 Brucella isolates from sheep confirmed that the epidemic strains were B. melitensis biovar 3 (n = 9) and B. melitensis biovar 1 (n = 1). MLVA-11 (multiple-locus variable-number tandem repeat analysis) analysis of the 10 isolates showed three genotypes: genotype 116 (n = 8), genotype 115 (n = 1) and genotype 136 (n = 1). Furthermore, analysis of the whole-genome sequences of the representative B. melitensis strain QY1 indicated that this isolate was closely related to isolates from China and India. The results of serum epidemiology confirmed that the region of northern Qingyang was a critical Brucella epidemic area and that the disease showed a rising trend, especially from 2013 to 2015. An analysis of the isolate genotypes suggested that sheep brucellosis mainly resulted from conventional B. melitensis (East Mediterranean group), although the external strain (American group) also occurred in Qingyang.</p
Measurement of Rural Residents’ Mobility in Western China: A Case Study of Qingyang, Gansu Province
No full textMobility is a popular topic in the fields of humanities and social sciences. China’s rapid urbanization has resulted in the acceleration of urban–rural mobility. Moreover, the implementation of the New Urbanization and Rural Revitalization Strategy has demonstrated the prospects of urban–rural integration and development. However, research on rural mobility is mainly focused in the fields of economics and sociology, with insufficient attention paid to spatial mobility. The main purpose of this study is to introduce a new theoretical explanation of the four dimensions of rural mobility based on a complete understanding of the current socio-economic background, namely, network mobility, green mobility, people-oriented mobility, and smart mobility. On this basis, a rural mobility evaluation index system is proposed by attempting to build a synthetic rural mobility index from the four aforementioned dimensions. Qingyang, a typical city in Western China located in the Loess Hilly Region, is taken as an example. Accordingly, the comprehensive rural and four-dimensional mobilities are analyzed and evaluated, and the effectiveness of the index system is verified. Results show that Qingyang’s rural mobility is at a low level, but differences in the types of rural residents, districts and counties, and dimensions of mobility are observed. At the end of this paper, the inclusion of mobility promotion in the policy system of rural revitalization is emphasized
Helium Resource Evaluation in the Qingyang Area of the Ordos Basin Based on Natural Gamma Logging
No full textTo explore the contribution of helium generation from sedimentary rocks to helium reserves in the Qingyang area of the Ordos basin, natural gamma logging technology is used to reflect the abundance of radioactive elements in rocks by detecting the natural radioactive intensity of U, Th and K in the formation. Combined with core sampling and laboratory energy spectrum analysis, the contents of U and Th elements are calibrated and the natural gamma logging values are fitted to calculate the helium generation amount. The logical chain of "radioactive element abundance—helium generation rate—cumulative amount" is used to evaluate the helium generation potential of potential helium source rocks. Logging data from 23 wells, along with data on formation thickness, density, and area, are used to quantitatively assess the total helium resource generation from major sedimentary rocks in the study area, which is compared with the conventional component method. The research results show that: ①The helium generation potential of different lithologies is bauxite > mudstone > sandstone, and that of different horizons is Taiyuan formation > Shan 2 member > He 8 member ≈ Shan 1 member. ②The total helium generation from sandstone horizons of He 8 member and Shan 1 member in the Qingyang area is 0.911×108 m3, that from mudstone horizon of Shan 2 member is 11.116×108 m3, that from bauxite horizon of Taiyuan formation is 4.431×108 m3, with a total of 1.646×109 m3, and the Heshui area and its surrounding regions have high helium generation potential. ③The calculated helium generation potential of sandstone in Shan 1 member is slightly higher than the measured helium content, the calculated value of bauxite in Taiyuan formation is close to the measured value, the calculated value of He 8 member is significantly lower than the measured value, and the total helium generated by the sedimentary rock series in the study interval is higher than the measured helium content in the Qingyang gas field. ④The genetic method can quantify the helium resource generation, predict resources in undeveloped areas, and reduce exploration risks, but it is highly dependent on data and may overestimate resources, the component method can directly calculate recoverable resources but cannot dynamically evaluate gas reservoirs or predict undeveloped horizons. It is concluded that the helium generated by the sedimentary rock series can be the main helium source rock. The genetic method, based on the analysis of the genetic mechanism of helium resources, can calculate the theoretical resource amount more accurately and can be used for preliminary prediction of favorable helium exploration areas
A new twist on glass: A brittle material enabling flexible integrated photonics
No full textGlass is in general brittle and therefore usually cannot sustain large deformation. Recent advances in glass material development as well as micro-mechanical designs, however, are set to defy the conventional wisdom through the demonstration of flexible integrated photonics that can be bent, twisted, and even stretched without compromising its structural integrity and optical performance. In this paper, we review the latest progress in this emerging field, and discuss the rational material and mechanical engineering principles underlying the extraordinary flexibility of these photonic structures. Leveraging these design strategies, we demonstrated bendable chalcogenide glass waveguide circuits, flexible glass waveguide-integrated nanomembrane photodetectors, and stretchable glass photonics.National Science Foundation (U.S.) (Award 1453218)National Science Foundation (U.S.) (Award 1506605)United States. Department of Energy (Grant DE-NA0002509
The Fox from Bajiazui (Qingyang, Central China) and an Update on Early Pleistocene Foxes from China
No full text(1) Background: despite the fact that nowadays the genus Vulpes Frisch, 1775, is the most diverse among extant Canidae, its fossil record is utterly scarce, especially in the Asian Pliocene. The sparse nature of this record further complicates the reconstruction of the evolutionary scenario to fit these taxa with extant species. The situation seems to change slightly in the Early Pleistocene when two species are recorded: Vulpes alopecoides (Del Campana, 1913) in Europe and Vulpes chikushanensis, Young, 1930, in Asian localities. Unlike the former, which has an extensive record, the remains of the Chinese V. chikushanensis are sporadic and the validity of the taxon has also been questioned. (2) Methods: the study of the specimens from the Early Pleistocene site of Bajiazui (1.8-1.2 Ma, Qingyang, Gansu) in comparison to an extensive sample of Vulpes spp. The Pliocene-Early Pleistocene is relevant for the delimitation of fossil foxes variability; (3) Results: morphologically and morphometrically, the specimens of Bajiazui fit with the specimens of V. chikushanensis from other Chinese localities of the Early Pleistocene, e.g., Longdan (Gansu) and Huiyu (Fangshang), highlighting some difference with the latest Early Pleistocene forms of Jigushan fox; (4) Conclusions: the revision of the Asian fossil record of Vulpes is crucial in our attempt to understand and reconstruct the evolution of carnivoran guild during the late Early Pleistocene (1.8-0.8 Ma). The fox remains from Bajiazui, although fragmentary, add a valuable piece to our knowledge of V. chikushanensis, a species possibly strongly related to the extant Vulpes corsac (Linnaeus, 1768)
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