RESEARCH ON THE THEORY AND METHODS OF COMPREHENSIVE EVALUATION OF REGIONAL COAL RESOURCES

consists of forecasting for the total reserves of regional mineral resources and evaluation,compreIn general,based on evaluated objects and factors involved,evaluation of mineral resources hensive evaluation of regional mineral resources, and economic and technical evaluation of deposits. Here a region can be a country, a province, or a mining area, while a deposit is mainly related to a single type of mineral, although it can contain more than one types of minerals. In the past, to assess mineral resources was primarily to evaluate and forecast the total reserves of regional mineral resources. With the advancement of science, technology, and economy, the evaluation of mineral resources has developed from forecasting the reserves of them to comprehensively evaluating them on the basis of numerous factors.

Influential Factors in Employment Location Selection Based on “Push-Pull” Migration Theory—A Case Study in Three Gorges Reservoir Area in China

In China, farmers employed in non-farm work have become important socio-economic actors, but few studies have examined the farmers' perspective in making their work location choices. Based on "push-pull" migration theory, this paper utilizes sectional data from a 2013 survey of farmers in China's Three Gorges Reservoir area to empirically analyze the factors influencing migrant workers' choice of employment location. The results indicate that 60.46% of laborers have migrated from their home province, whereas 39.54% have remained in their home province. Focusing on personal, household, and community characteristics—in addition to the economic characteristics of the sample counties—multinomial logistic regression models reveal that farmer-laborers' employment location decisions are influenced by their personal capital endowment(age, years of education and social networks), family structure(the number of laborers, elders, children and students), home village characteristics(location, economic development level and the degree of relief of the land) and home county economic development level. Notably, male and female laborers' location decisions reveal a converging trend, and their differences are not pronounced. Per capita arable land area has little influence on location decisions, whereas the educational level of laborers has a significant impact. The results differ significantly from those found in previous studies.

The Central Asian Regional Security Complex Revisited:Understanding the Implications of the US Retreat From Afghanistan

On February 29,2020,President Donald Trump announced the United States signed a peace agreement with the Taliban,signifying the United States‟intention of leaving Afghanistan in the near future.Though the global pandemic has altered US withdrawal plans,the question still remains:What will become of the Central Asian regional security complex following America‟s exit?Buffered by the presence of the United States since 2001,the Central Asian republics now once again find themselves at a crossroads to either rely on individual defense services or to develop increased military cooperation with interested states.Recognizing Central Asia‟s history of collaboration among its regional and near-regional countries,I argue that the Central Asian Republics of Afghanistan,Kazakhstan,Kyrgyzstan,Tajikistan,Turkmenistan,and Uzbekistan will seek to develop stronger security ties with neighboring regional security complexes(RSCs),namely the South Asian,Russian,and Chinese RSCs.With decreased American influence,each of the states in these RSCs is rushing to fill the void of influence in order to capitalize on Central Asia‟s geostrategic position in Eurasia as well as secure itself from the threat of non-state actors still prevalent in the region.I further argue that the states in the Central Asian RSC additionally seek these same benefits and security,but receive them to a much lesser extent than their more powerful regional neighbors.Understanding how the American withdrawal from Afghanistan will impact Central Asian RSC relations can provide insight into how great power vacuums are filled both by great powers and regional powers alike.

Regional Society and Xiangzu (Rural Lineage) Theories:Socioeconomic History from a Comparative Perspective

Today’s Chinese and Japanese scholars have maintained close dialogues and exchanges in their research on ancient Chinese history.The socioeconomic history of the Jiangnan region during the Ming and Qing dynasties involves two important research areas:regional history and socioeconomic history.Whereas the former embraces a holistic macro-view,the latter lays stress on the economic and social behavior of humankind.Over past years,endeavors to combine the two areas have produced a number of influential general conclusions on the social development of Jiangnan during the Ming and Qing.Professor Mori Masao,a Japanese scholar,has provided an in-depth interpretation of the theory of regional society,while Professor Zheng Zhenman,a Chinese scholar,has responded in terms of xiangzu theory.Long-term dialogues and exchanges in the international academic world that inspire theoretical innovation in studies of earlier societies can serve as a valuable source for the intellectual community.

Effect of 43 cases of temporomandibular joint dysfunction treated with thumb-tack needle based on the meridian cutaneous region theory

Objective： To observe the clinical efficacy of thumb-tack needle on temporomandibular joint dysfunction（TMD）.Methods： A total of 43 outpatients of TMD were treated with thumb-tack needle. After the skin routine sterilization, the intradermal needles, 0.2 mm x 1.5 mm（the SEIRIN-thumb-tack needle） were embedded subcutaneously at Zúlinqì（足临泣GB 41）, Zhōngzhǔ（中渚 TE 3） and Xiàguān（下关 ST 7） on the affected side. The acupoints were pressed and kneaded gently to induce mild soreness and distention.When pressing and kneading GB 41 and TE 3, the patients were required to open and close the mouth in small amplitude to achieve the effects of kinetic acupuncture. The treatment was given twice a week.The needles were retained for 24 h. A total of 6 treatments were required.Results： A total of 22 cases were cured, accounting for 51.16%, 15 cases effective remarkably, accounting for 34.88% and 6 cases failed, accounting for 13.95%. The total effective rate was 86.05%.Conclusion： The thumb-tack needle is significantly effective on TMD.

An Empirical Analysis on Diversity of Regional Economic Growth in Jiangsu Province of China

By using index β * and δ * ,this paper carries out an empirical analysis on diversity of regional economic growth in Jiangsu province. Firstly, the paper, from the point of view of economics, divides diversity theories of economic growth into three categories, i.e. the theory of convergence, the theory of divergence and the theory of constant differentials, and analyses them respectively. Secondly, the paper, using sectional and time series data, compares and studies regional economic growth among southern, middle and northern part of Jiangsu province. Finally, the paper analyses the empirical conclusions. The main conclusion is that the theory of convergence is suit to Jiangsu economic growth.

A Theoretical Research on the System of Regional Development Models

According to the to the typical practice in some less developed regions this paperre developed regions,this paper researches the theories and methods of construction of regional development models.Inaccordancc In accordance with the of region system of man-land relationship,the auther analyses the natural evolution trends of region system as wed as the internal and the spatiai structun of region system.On the basis of theoretical study and typical example analyses,the paper presents a system of regional develoment models,including forecasting models,structure analysis and planning models,spatial-location models and strategic decision models.

Typhoon Risk Perception: A Case Study of Typhoon Lekima in China

The typhoon is one major threat to human societies and natural ecosystems, and its risk perception is crucial for contextualizing and managing disaster risks in different social settings. Social media data are a new data source for studying risk perception, because such data are timely, widely distributed, and sensitive to emergencies.However, few studies have focused on crowd sensitivity variation in social media data-based typhoon risk perception. Based on the regional disaster system theory, a framework of analysis for crowd risk perception was established to explore the feasibility of using social media data for typhoon risk perception analysis and crowd sensitivity variation. The goal was to quantitatively analyze the impact of hazard intensity and social and geographical environments on risk perception and its variation among population groups. Taking the Sina Weibo data during Typhoon Lekima of 2019 as an example, we found that:(1)Typhoon Lekima-related Weibo public attention changed in accordance with the evolution of the typhoon track and the number of Weibo posts shows a significantly positive correlation with disaster losses, while socioeconomic factors,including population, gross domestic product, and land area, are not explanatory factors of the spatial distribution of disaster-related Weibo posts;(2) Females, nonlocals with travel plans, and people living in areas with high hazard intensity, low elevation, or near waterbodies affected by Lekima paid more attention to the typhoon disaster;and(3)Descriptions of rainfall intensity by females are closer to the meteorological observation data.