基于PSR模型的区域土地利用可持续水平测度

[目的]研究广西壮族自治区钦州市土地利用可持续水平,为城市土地合理利用与科学管理提供理论依据。[方法]利用PSR模型,选取15个评价指标建立评价指标体系对钦州市土地利用可持续水平进行测度。[结果]2008—2010年土地利用可持续水平不断上升,2011—2015年土地利用可持续水平升呈现升降起伏变化。评价结果基本能够反映钦州市8a来土地利用可持续水平的动态变化水平。[结论]社会经济和城市化的快速发展以及人口的急剧增长是影响钦州市土地利用的三大重要因素,需要采取政策调控措施才能够对土地进行有效的管理,确保钦州市土地的可持续利用和社会经济稳定发展。

碳限额政策下库存运输可持续水平集成优化

基于分散协调和集中控制供应商管理库存(vendor-managed inventory,VMI)供应链,构建碳限额政策下库存运输可持续水平集成优化模型,研究碳限额政策对可持续供应链性能的影响。运用Stackelberg方法构建供应链博弈模型,并在Matlab中模拟实施碳限额政策前后可持续水平优化决策过程。为了调节供应商和零售商之间的溢出效应,设计基于收益共享契约的供应链协调策略。研究结果表明,碳限额政策能提高库存和运输可持续水平,但对服务水平没有影响;集中控制VMI供应链总利润随碳限额单调递增,而分散协调VMI供应链总利润则随碳限额呈先升后降的变化趋势;无论实施碳限额政策与否,集中控制VMI供应链总利润和可持续水平均大于分散协调VMI供应链。

山东省水资源可持续利用水平评价及对策研究

山东省是我国的经济和人口大省,近年来随着人口增加和经济水平的不断提高,水资源供需缺口日益增大。运用主成分分析和聚类分析方法对当前山东省水资源可持续利用水平进行评价,同时根据评价结果划分出四种不同的类型区,最后分析每种类型区的成因并提出促进水资源可持续利用的相关建议。

盐城市城市土地可持续利用水平综合评价研究

伴随社会经济的发展和城市化进程的不断深化，城市土地的可持续利用已成为推动城市环境、经济、社会协调发展的重要基础。以江苏省盐城市为例，从资源环境、经济发展和社会协调3个方面构建了盐城市城市土地可持续利用水平评价指标体系，对盐城市2009和2010年城市土地可持续利用情况进行了综合评价，并针对评价结果进行分析并提出了相关建议。

基于三维水足迹模型的河南省水资源可持续利用水平评价

基于三维水足迹模型,以水生态赤字与盈余、水压力指数、水资源集约利用指数和水资源可持续指数4个指标构建水资源可持续利用水平指标评价体系,从时间上和空间上分析河南省的水资源可持续利用水平,并且利用对数平均迪氏指数分解法分析水足迹变化的驱动因素。结果表明:河南省水足迹由大到小为生产用水足迹、生活用水足迹和生态用水足迹,其中豫北和豫中各市的水足迹深度较大;河南省整体水资源可持续利用水平较差,其中豫北和豫中地区的水资源可持续利用水平最差;经济规模效应、人口规模效应对水足迹的变化具有正向驱动作用,而水足迹强度效率效应和水资源承载力效应具有负向驱动作用。

浦北县六万山国有林场可持续经营水平评价研究

文章在对国内外关于森林可持续经营水平评价研究的基础上,运用目标法和专家咨询法相结合,建立了林场可持续经营水平评价指标体系,并通过构造判断矩阵计算各层次排序和总排序各指标的权重值,通过专家打分的方法确立了林场可持续经营水平评价等级,对六万山国有林场可持续经营水平进行了评价,最后得出六万山国有林场属于中等偏强的可持续经营水平。

强化“一通三防”针对性管理提升矿井可持续安全水平研究

本文主要以强化“一通三防”针对性管理提升矿井可持续安全水平研究为重点进行阐述,首先对开展矿井“一通三防”安全管理的现状和重要性进行分析,其次从树立严谨工作思想,提升安全管理水平、注重粉尘危害,保证人员安全、预防火灾发生,强化防火实训、注重和场地结合,优化日常通风管理和优化矿井瓦斯管理,及时处理安全隐患等几个方面深入说明并探讨,旨在为相关研究提供参考.

寒地黑土区水土资源可持续利用评价研究

为了给地方水土资源管理提供科学依据,促进农业生产的可持续发展,本研究以密山市为研究区域,构建了一套适用于寒地黑土区,并包含经济、社会和环境三个维度的评价指标体系,采用层次分析法和熵权法组合赋权的TOPSIS模型对研究区进行水土资源可持续利用水平分析。结果表明:(1)2012—2021年密山市水土资源可持续利用水平由0.2523上升至0.7374,可持续状态由弱可持续变为中度可持续。(2)在各子系统中,状态子系统对密山市水土资源可持续利用评价值的影响最大,其次是响应子系统,驱动力子系统对密山市水土资源可持续利用评价值的影响最小。因此,密山市可以通过提高农业生产力、加强环境保护、推广节水技术、提高农业生产效率、调整经济发展策略和优化产业结构等方式来推动水土资源可持续利用。

中国省域能源系统可持续发展研究--基于韧性与效率协同发展视角

基于韧性与效率的协同发展视角,测算了2000年-2019年30个省(市、区)能源韧性和效率值,对两者之间的协调发展关系进行了评价,分析了能源系统可持续发展水平。结果表明:中国能源韧性及效率水平总体偏低,呈东、中、西阶梯式递减格局;能源系统发展度及协调度都呈现波动上升趋势,但能源系统发展度高低依次排列为东部、西部、中部,东部地区的能源系统协调度最低,各区域能源可持续发展水平存在差异。

Comparative Analysis of Fiscal Sustainability of China and the US

The fiscal sustainability of China and the United States is of major concern globally. Based on comparative data analysis, this paper reveals that the government debt level of both countries is within the normal range. Robust growth prospects of both countries will also vigorously support their future mitigation of government debt level. Comparatively speaking, China＇s government debt level is healthy and, despite extensive concerns, even its local government debt is not very high. The assessment that China may encounter a crisis is not supported by evidence. Yet in the long run, both countries will face pressures from increased fiscal spending on elder care and healthcare stemming from an ageing population, which will threaten their fiscal sustainability. These challenges require both countries to speed up reforms of elder care and healthcare. Specifically, China needs to focus on elder care reforms and the US should attach more importance to healthcare reforms.

Changes in Agricultural Biodiversity: Implications for Sustainable Livelihood in the Himalaya

Himalayan mountain system is distinguished globally for a rich biodiversity and for its role in regulating the climate of the South Asia. Traditional crop-livestock mixed farming in the Himalaya is highly dependent on forests for fodder and manure prepared from forest leaf litter and livestock excreta. Apart from sustaining farm production, forests provide a variety of other tangible and intangible benefits, which are critical for sustainable livelihood of not only 115 million mountain people, but also many more people living in the adjoining plains. Extension of agricultural land- use coupled with replacement of traditional staple food crops by cash crops and of multipurpose agroforestry trees by fruit trees are widespread changes. Cultivation of Fagopyrum esculentum, Fagopyrum tataricum, Panicum miliaceum, Setaria italica and Pisum arvense has been almost abandoned. Increasing stress on cash crops is driven by a socio-cultural change from subsistence to market economy facilitated by improvement in accessibility andsupplyofstaplefoodgrainsatsubsidizedpriceby the government. Farmers have gained substantial economic benefits from cash crops. However, loss of agrobiodiversity implies more risks to local livelihood in the events of downfall in market price/demand of cashcrops,terminationofsupplyofstaplefoodgrains at subsidized price, pest outbreaks in a cash crop dominated homogeneous landscape and abnormal climate years. Indigenous innovations enabling improvement in farm economy by conserving and/enhancing agrobiodiversity do exist, but are highly localized. The changes in agrobiodiversity are such that soil loss and run-off from the croplands have dramatically increased together with increase in local pressure on forests. As farm productivity is maintained with forest-based inputs, continued depletion of forest resources will result in poor economic returns from agriculture to local people, apart from loss of global benefits from Himalayan forests. Interventions including improvement in traditionalmanureandmanagementofon-farm trees, participatorydevelopmentofagroforestryindegraded forestlandsandpoliciesfavoringeconomicbenefitsto local people from non-timber forest products could reduce the risks of decline in agricultural biodiversity and associated threats to livelihoods and Himalayan ecosystems.

China’s Food Security Status:Assessment and Strategic Reflections

Based on an internationally recognized concept of food security, this paper has created a system of eight indicators to analyze China＇s food security. For the proper control and analysis of this study, the authors of this paper have chosen these indicators： supply, distribution, consumption, utilization efficiency, food security results, stability, sustainability and controllability. Results indicate that China＇s food security is currently at a high level and has been increasing in recent years. China＇s food security has multiple advantages with various indicators that include a self-sufficiency ratio, per capita calorie intake and protein supply that are above world average levels, even exceeding the average level of some developed countries. Major challenges facing China＇s food security include an unreasonable nutrition structure and poor environmental sustainability. In order to increase China＇s food security level, efforts must be made to adjust output structure, adopt an environmentally friendly pattern of production, attach importance to demand management, reduce unreasonable consumption and loss and moderately lower China＇s food reserve ratio.

Analysis of The Quality Status of College English Teachers In China

Enhancing the teaching quality of college English teachers in China is an important guarantee to improve the level of English teaching and is a realistic choice of promoting the sustainable development of English education. The article analyzes the basic quality that college English teachers should have and discusses the current English teaching status in order to improve the quality of English teachers and promote the development of English teaching in China.

Sustainability Aspects of the Wheat Sector

In the frame of the present study, we examined the wheat sector with respect to economic and social sustainability. Accordingly, two research questions were formulated： （1） Is wheat production sustainable in economic terms？ and （2） Is wheat production sustainable in social terms？ Our view is that the content of sustainability can be defined on a case-by-case basis, and in our case, wheat production provides this content. To answer the research questions, we collected statistical data on the production area, average yield, production volume, selling price, consumption of wheat, and evaluated the tendencies prevalent in the sector. We suppose that in social terms, sustainability means maintaining consumption at least at a constant level, knowing that this sector produces considerable share of the direct and indirect food raw materials. A chief dilemma is that world population is continuously growing, although the size of the cultivated area in the wheat sector has not indicated significant changes over the past few decades. Unless increasing the yields, severe decrease may occur in the per capita production of wheat in the long run. In this case, the current consumption level will not be sustainable in the medium run. In addition, in the long run, it may even have influence on the consumption level of other commodities.

Present Situation and Future of Animal Fiber Production in Turkey： A Review

Primarily the production of wool, mohair, silk, goat coarse hair and cashmere fibers is made in Turkey. However, there has been a significant level of decrease in the production of these fibers for many years. The factors mainly causing this decrease can be said to include rapid increase in the use of chemical fibers, changes in fashion which have negative impacts on the consumption these fibers and systematic problems which negatively affect the production of sheep, Angora goat, hair goat and silkworm. However although the production resources are continuing to decrease, Turkey still has a significant level of animal fiber production potential. Attainment of a more effective utilization of this potential will significantly contribute to the establishment of a sustainable textile industry and rural development and the preservation and development of folkloric culture and native farm animals which produce fibers.

Theoretical and Empirical Analysis on Influence Factors of Modern Agricultural Equipment Level in the Processof Agricultural Sustainable Development

To promote modem agricultural equipment level is one characteristic of constructing and developing modem agriculture in China. This paper makes up stepwise linear regression analysis model of influence factors of modem agricultural equipment level, and chooses rural labor, per capita income of rural residents, rural investment, proportion of people at secondary education level and at higher level in per hundred rural labor force and arable land area as independent variables, and total power of machine as induced variable. The major results show that the relativity of modem ag- ricultural equipment level, rural investment and education level of peasants is remarkable, and they are the major influence factors of modem agricultural equipment level. Raising investment level of rural infrastructure construction as well as and research and devel- opment and promotion of advanced and applicable modem agricultural equipment, improving quality and education level of peasants can accelerate the development of China＇s modern agricultural equipment effectively in the process of agricultural sustainable development.

A Research on Problems for Sustainable Development of Mining Cities in China

As a significant issue, mining cities, especially the resource-exhausted mining cities have already been given intensive attention by academia and government. This article discusses the intrinsic and extrinsic reasons for problems of the mining cities from the perspective of sustainable development, quantitatively analyzes the economic benefit of the mining cities with statistical data, and presents the strategies and measures for sustainable development of the mining cities based on the theoretical discus- sion and empirical study of different types of mining cities. The research shows that: (1) the conflict between the mining cities and the mining enterprises which has been incorrectly dealt with for a long time is the primary reason for the problems of the mining cities. More seriously, the development gap between mining cities and non-mining cities is becoming larger than ever before, due to the domestic and international competition. (2) As a whole, the economic development level of the mining cities is lower than the average level of countrywide cities. The economic benefit of the mining cities is increasing owing to the economic scale, and the economic situations of oil-mining cites and iron-mining cites are relatively better than those of other types of mining cities. (3) The prerequisite of sustainable development of the mining cities is the realization of the transformation of capital superiority so as to promote non-mining economy and substitute the mining economy step by step.

Statistic Measurement and Empirical Research on Sustainable Development of China Internet

In this paper,the concepts of green development and coordinated development of the Internet are proposed,and the connotation of sustainable development of the Internet is defined further.Based on these,by using the comprehensive evaluation method,the Internet sustainable development index(ISDI) system is created and designed,the sustainable development level of the Internet in China is evaluated and measured systematically,and corresponding policy suggestions are given.