曹焕文运城盐池化工及技术演进研究

化工专家曹焕文集数十年盐业亲历与研究,从地质、气候、化学、水利等多学科角度进行了详细、专门的探讨,得出诸多影响深远的结论.尤其是对"硝板晒盐"的独特产盐原理进行了科学分析,对硝板的成因进行了讨论,更重要的是第一次具体论定了硝板的化学成分,这些成果至今仍是许多相关研究普遍承认并引用的结论.他在畦晒技术演进的梳理与考证中,对大池与小池产盐工艺的进步提出角度新颖的观点,更将古代解池化学进步的历史年代考证与同是化学问题的火药史研究联系起来,得出了二者都发端于魏晋南北朝时期的重要结论.

Evolution of China's Import Structure from 2000 to 2014

This paper creates a new analytical framework for analyzing the international trade structure, estimates the changes in China＇s import structure, and conducts a comparative analysis with 18 countries. This paper＇s findings are as follows： （1） Between 2000 and 2014, China＇s import structure underwent fundamental changes, with a significant rise in the share of non-agricultural primary commodities and high-tech products in China＇s total imports. The overall technology level in China＇s imports decreased at first before keeping on the rise since 2007. （2） High-tech products always represent the highest share of around 20% in the world import market. However, the share of high-tech products in China＇s imports did not meet the worm average level until 2012. （3） Developing countries account for less than 25% of China＇s imports except for agricultural primary commodities. Developed countries have always accounted for more than 50% of China＇s total imports of medium-high-tech, high-tech and ultra-high-tech products.

Studies on the impact of the evolution of Volleyball Rules upon technology and tactics

As it developed to today, Volleyball evolved from a game for the purpose of entertainment initially to a competitive Olympic sport. Through various periods of Volleyball development, we can find that when some old rules can not adapt to the volleyball development, it will lead to changes in the rules, it is this continuous improvement and change that inject vigor to volleyball and bring vitality, and promote the innovative development of volleyball skills and tactics, in turn the constant enrichment and development of volleyball skills and tactics required the game rules constantly revised and improved, as promoted and restricted each other, analysis of the mutual relationship between volleyball game rules and technology or tactics can not only in favor of volleyball skills, like evolving tactics, but also beneficial to volleyball competition rules maturity. Development of Volleyball Rules has been the inexhaustible power to development of sports project, researching of the competition rules has been recognized as a major breakthrough in the field of sports in various projects to promote sports development. Volleyball Rules - from the generated moment until today, has evolved many times. This evolution is not blind, random; it follows its inherent rule. A contest rule, which has a close relationship with the development of sports technology, are the basic norms and principles of sports game. They promote each other, while mutually restraint. Analysis of the relationship between volleyball competition rules and the technology or tactics, is not only conducive to the development of athletic skills, but also to the maturity of competition rules.

Implementation of the Earth-based planetary radio occultation inversion technique

The planetary radio occultation technique is one of the earliest suggested and achieved methods to detect the planetary atmosphere,and has been conducted by almost every deep space planetary probe.The principles,modules,inversion results and primary analysis of the SHAO Planetary Occultation observation Processing system(SPOPs) are presented in this paper.Utilizing open-loop and closed-loop Doppler residual data of the Mars Express radio occultation experiment provided by ESA PSA and NASA PDS,the temperature,pressure,molecular number density profiles of Martian atmosphere and electron density profiles of the ionosphere are successfully retrieved,and the results are validated by the released radio science level 04 products of the ESA MaRS group.This system can also process the atmosphere radio occultation observations of other planets and theirs natural satellites.The implementation of the planetary radio occultation technique is of significance to China's YH-1 Mars exploration project,as well as for future planetary exploration missions from China.

The Evolution of Desertification Control and Restoration Technology in Typical Ecologically Vulnerable Regions

Global economic development and increasing human activities have brought great challenges to fragile ecosystems.In order to avoid,reduce,and reverse desertification,Chinese and foreign scientists and ecological governance institutions have developed a series of ecological restoration technologies(ERTs)and models in the past few decades.These technologies can improve residents’livelihoods,strengthen disaster resilience,and launch a comprehensive review of degraded ecosystems in desertification regions.However,some studies and practices have limited the selection and promotion of good technologies and the assessments of these technologies,resulting in the waste and loss of funds and manpower.The objective of this study is to identify desertification control and restoration technologies and models,summarize the evolutionary features and trends of these technologies under different natural conditions,and evaluate the various ERTs that are now available.The data sources of this study include the databases of international organizations,CNKI,related literature and reports,and questionnaires from institutions and experts.First,the three stages of ERTs evolution were summarized,and the key events and social-economic developments were identified as the driving forces of evolution.Then,the four categories of ERTs were identified as biological,engineering,agricultural,and management ERTs.Finally,the key ERTs were evaluated in the five dimensions of the degree of difficulty,the degree of maturity,effectiveness,suitability,and potential for transfer.The management ERTs scores for the degree of difficulty,the degree of maturity,and potential for transfer are higher.This study provides a reference for adapting to local conditions,the comprehensive management,rational development,and utilization of dryland resources,improving the application of ecological technologies,and promoting the export and import of the excellent technologies.