Assessing the dynamics of human activity intensity and its natural and socioeconomic determinants in Qinghai-Tibet Plateau

Investigating the spatiotemporal variation of human activity intensity and its determinants is a crucial basis for further revealing the mechanism of human-environment interaction and optimizing the human development mode.In this study,the human activity intensity on the Qinghai-Tibet Plateau(QTP)from 1990 to 2020 was measured based on the quantitative model of land use data and the actual regional background,and the under-lying natural and socioeconomic determinants were investigated using spatial econometric methods.The results demonstrate that(1)the human activity intensity in QTP has increased by 11.96%,and there are differences in different spatial scales;the areas with high human activity intensity are distributed in the Hehuang Valley where Xining City and its surrounding areas are located,as well as the One-River and Two-River Area where Lhasa City and surrounding areas are located.(2)Human activity intensity has significant positive spatial spillover,suggesting that local changes will cause changes in the same direction in adjacent areas.(3)The human activ-ity intensity in QTP is affected by various determinants.Concerning socioeconomic factors,the economic level has no significant impact on the human activity intensity in QTP,which differs from the general regional law.Both urbanization and traffic conditions have a significant positive effect,and the impact intensity continues to increase.Concerning natural factors,topographic relief has a significant positive effect;the impacts of temper-ature and vegetation coverage have changed from insignificant to a significant positive effect;the impacts of precipitation and river network density have not been verified;there is no linear relationship between altitude and human activity intensity in the entire QTP,while it exists in local regions.Finally,this study proposes three policy implications for the realization of a more harmonious human-environment relationship in QTP.

Concentrations and Distribution Patterns of Rare Earth Elements in Water Body from Intertidal Flat of Tianjin and Influence of Various Factors

Concentrations and distribution patterns of rare earth elements(REEs)in the intertidal flat of Tianjin were studied using P(507) resin and ICP-MS analytical technology. The results show that average concentrations of REEs in the filtered(dissolved REEs), unfiltered and interstitial water are 0.461 μg·L^(-1), 4.98 μg·L^(-1) and 0.845 μg·L^(-1), respectively. Their distribution patterns are similar to those in inland natural rivers, but quite different from those in oceans. The average concentrations of REEs in sediments and suspended matters are 161.2 (mg·L^(-1)) and 168.1 mg·L^(-1), respectively, which are much lower than those in sediments of natural rivers but higher than those in sediments of the continental shelf of East China Sea. It is suggested that REEs in sediments and suspended matters of intertidal flat can have mainly originated from terrestrial soils and thus their transportation and transformation processes are similar with those in rivers, and different from those in continental shelves. Pollutants discharged into the Bohai Bay do·not cause significant effect on REEs in the intertidal flat of Tianjin yet.

Analysis of overseas investment of Chinese textile and garment enterprises

With China's accession to the WTO and the demise of MFA,the global industrial network of textiles and garments has undergone accelerated reconstruction.In order to meet the challenges of various forms of trade friction of developed countries and other low-cost challenges of developing countries and less developed countries,overseas investment by China's textile industry has become an important strategic choice.Using statistical data,field research and expert interviews,this paper analyzes the characteristics of the overseas investment of Chinese textile enterprises,analyzes the difficulties and challenges faced by textile and garment enterprises,and puts forward the overseas investment guidance strategy for Chinese textile enterprises.In order to progress smoothly,China's textile and garment enterprises should develop according to international business operation needs.In the "going out" process,enterprises must fully assess the risk and adopt good preventive measures,so as to optimally allocate international and domestic resources.

Factors influencing the quality of rural human settlements in a peripheral metropolitan area based on a structural equation model:A case study from Beijing

Rural human settlement is a significant indicator of the living standards of rural residents,and its improvement can contribute to promoting the positive interaction between inhabited environment and the social,economic,and resource environment in the countryside.Based on 557 valid questionnaires of satisfaction evaluation of human settlement in the peripheral metropolitan area of Beijing,this paper analyzed the elemental characteristics and factors influencing human settlement quality using multivariate statistical analysis and a structural equation model.The result shows that,first,the rural residents in a peripheral metropolitan area of Beijing are generally satisfied with the quality of human settlement(satisfaction rate is 66.2%).Specifically,the natural and social environment of the countryside is excellent and harmonious and corresponding standard of countryside infrastructure is advanced,but the quality of public services and follow-up management of facilities are in urgent need of improvement and the imbalance between revenue and expenditure of rural households has led to a continuous increase in the pressures of life.Second,factors such as social atmosphere,appearance of the village,entertainment,living costs,fundamental public services,and production costs have significant effects on human settlement quality in this peripheral metropolitan area,with social atmosphere as the main one.Living costs and supporting services are the main constraints to improvement in the quality of human settlement.

Accumulation of Lathenum with Various Species in Oryzias Latipes Body

The accumulation and absorption kinetics of La by fish (Oryzias latipes) from both water and food were tested in fresh water. The effects of La concentration in water and food and the existence of fulvic acid on the absorption were investigated. It was demonstrated that the amount of La accumulated in fish increases with the increase in La concentration in water and food and exposure duration, which the normal physiological activity of fish was inhibited. With fulvic in the system, the absorption rate decreases significantly indicating that the fulvic combined La is not available to the fish uptake.

Co-adaptation between modern oasis urbanization and water resources exploitation:A case of Urumqi

水资源利用在在干旱地区的整个绿洲都市化期间总是是很重要的，与在矛盾和协作之间的城市的开发适应。作为一个盒子，水利用的合作改编和城市的生长拿 Urumqi 城市被在水供应和绿洲城市之间的相互作用模仿“ s 阐述人口，经济和环境。在不同都市化阶段，合作改编能不同地被代表，它能被五个阶段总结：基本协作，膨胀协作，膨胀矛盾，适应矛盾，和适应协作。水消费的费用，水使用和效率的比例是主要影响因素帮助合作改编。

Operating mechanism and set pair analysis model of a sustainable water resources system

There is no altemative to the world＇s water resources, and their increasing scarcity is making it difficult to meet the world population＇s water needs. This paper presents a sustainable water resources system （SWRS） and analyzes the operating mechanism that makes it possible to evaluate the status of such a system. A SWRS can be described as a complex coupling system that integrates water resources, social, economic and ecological systems into a whole. The SWRS＇s operating mechanism is composed of dynamic, resistance and coordination components, and it interacts with and controls the system＇s evolution process. The study introduces a new approach, set pair analysis theory, to measure the state of a SWRS, and an evaluation index system is established using the subsystems and operating mechanism of a SWRS. The evaluation index system is separated into three levels （goal level, criteria level and index level） and divides the index standard into five grades. An evaluation model of the SWRS based on set pair analysis theory is constructed, and an example of SWRS evaluation in Shanghai is presented. The connection degrees of the index in the three levels are calculated, and the connection degree of the goal index is calculated to be 0.342, which classifies the city＇s SWRS condition as grade 2. The sustainable use of water resources in the region is determined to be at a relatively adequate level that meets the requirements of sustainable development.

Input-Occupancy-Output Analysis of Industrial Wastewater Discharge Coeffcients and Backward and Forward Linkages: Multi-Regional Occupancy

This paper provides an extended input-occupancy-output analysis of wastewater discharge coeffcients, as well as backward and forward linkages of Chinese multi-regional industrial sectors in2007. The results show that the direct and total industrial wastewater discharge coeffcients of most of the provincial industrial sectors in China's Eastern region are lower than those of the whole country.Both backward and forward linkages of ?xed-asset occupancy in industrial sectors in China's Central and Western regions are strong. The dissimilarity of cross-sectional data of the relevant industrial wastewater discharge coeffcients and linkages in multi-regional input-output analysis becomes bigger as regions are divided more extensively.

Investment

On February 17,2016,Ministry of Commerce held the regular press conference,and its spokesman Shen Danyang responded to investment drawing high levels of concern from domestic and overseas media.The veritable records are as follows:Foreign Investment in China In January,the size of foreign investment in China sustained a steady growth and the utilization of foreign capital was further improved.The characteristics of foreign investment in China are