工业化与城市环形扩张过程中的生态与游耕——珠三角与北京郊区的代耕菜农

近年来,在中国东部地区城市化与工业化的过程中,催生了"代耕农业圈"的现象。这种代耕圈围绕城市与工业区分布,大量的代耕菜农游耕于其中。在代耕农业圈中,劳动力、土地、水源、河流、天气等生态要素都受到了来自工业或城市力量的支配,代耕农要受到资本、权力以及地方势力的挤压。来自于珠三角与北京郊区的案例均表明,生存于工业化或城市化进程中的代耕菜农,所从事的耕作已经不是传统农业社会的耕作,而是受现代化进程所支配的、不可逆的耕作;他们所从事的农业生产,是配套工业化和城市化的农业生产,是一种耗竭地力的"变态"式生产方式。

A State-of-the-Art Review of Mixing in Microfluidic Mixers

Microreaction technology is one of the most innovative and rapid developing fields in chemical engineering, synthesis and process technology. Many expectations toward enhanced product selectivity, yield and purity, improved safety, and access to new products and processes are directed to the microreaction technology. Microfluidic mixer is the most important component in microfluidic devices. Based on various principles, active and passive micromixers have been designed and investigated. This review is focused on the recent developments in microfluidic mixers. An overview of the flow phenomena and mixing characteristics in active and passive micromixers is presented, including the types of physical phenomena and their utilization in micromixers. Due to the simple fabrication technology and the easy implementation in a complex microfluidic system, T-micromixer is highlighted as an example to illustrate the effect of design and operating parameters on mixing efficiency and fuid flow inside microfluidic mixers.

Multi-objective Evolutionary Algorithms for MILP and MINLP in Process Synthesis

Steady-state non-dominated sorting genetic algorithm (SNSGA), a new form of multi-objective genetic algorithm, is implemented by combining the steady-state idea in steady-state genetic algorithms (SSGA) and the fitness assignment strategy of non-dominated sorting genetic algorithm (NSGA). The fitness assignment strategy is improved and a new self-adjustment scheme of is proposed. This algorithm is proved to be very efficient both computationally and in terms of the quality of the Pareto fronts produced with five test problems including GA difficult problem and GA deceptive one. Finally, SNSGA is introduced to solve multi-objective mixed integer linear programming (MILP) and mixed integer non-linear programming (MINLP) problems in process synthesis.

Darboux Transformation for Tzitzeica Equation

We present a Darboux transformation for Tzitzeica equation associated with 3 × 3 matrix spectral problem.The explicit solution of Tzitzeica equation is obtained,

Strategies to Promote Intercultural Communicative Competence in EFL Teaching

With the acceleration of globalization and internationalization, the demand for multilingual speakers is urgent, which promotes the development of foreign language teaching and learning especially English. Consequently, the English as a Foreign Language （EFL） teaching is paid great attention to in China. Many previous studies show the connection of EFL teaching and teachers＇ intercultural communicative competence （ICC）. Although it is presumed that teachers＇ ICC at this stage is a prerequisite to raise students＇ ICC, the specific strategies to promote teachers＇ intercultural skills in EFL teaching have not yet been empirically demonstrated. The goal of the present study is to put forward some specific strategies to promote teachers＇ ICC in EFL teaching. Two cases including interview and teaching plans, were administered in high school teachers. Sample analysis demonstrated teachers＇ current problems in ICC and in Chinese EFL teaching as well as the necessity for teachers to acquire the specific teaching strategies. These findings seem to suggest that specific strategies are indeed essential to promote teachers＇ ICC in EFL teaching.

Enhance the confidence of the academic theories and promote the localization of the English professional teaching theories in Chinese universities

With the acceleration of the process of the globalization, the teaching of the English major is becoming more and more important. The teaching should take the students as the main subjects, and the teaching of English should be based on the ability of the students. Our country is a big economic country, and the knowledge of English is spread widely in China, but most of its theoretical researches are t^om abroad. We should pay enough attention to the contents of this theoretical research. This kind of situation has also aroused the high attention of the relevant educational personnel. Therefore, we need to improve the self-confidence of the academic theories, strengthen the existing teaching theories and promote the localization of the teaching of English majors in an all-round way, which is also the key point of this article.

Study on the Internationalization and the Localization of Foreign Music Education Philosophy into the Process of Music Education in China

In the music education universities in China,the international music education and localization problem is a key problem in current society.It is also the music Chinese universities that must be facing the problem in education development.In current international society today in our country, the international music education in China has also become the trend of music education,and how the music education internationalization at the same time keeps the Chinese traditional music culture has become a common problem that today＇ s music industry pays attention to.In this paper, it makes the analysis and discussion on the internationalization of foreign music education idea introducing to our country＇ s music education process and localization problem.

Planning Sustainable Consumption and Quality of Life in the Baku City

The study of sustainable consumption （SC） and quality of life （QoL） in Baku City was undertaken as part of the Baku Strategic Plan prepared by the Department of Architecture and Urban Planning, Azerbaijan Architecture and Construction University, and partially supported by the Society of Urbanists of Azerbaijan, Research Group. The key purpose of the research was to provide useful information for developing planning and design strategies that would foster sustainable urbanization through enhancing QoL and consumption, which was one of the most important principles of sustainable urbanization. Another purpose was to explore the impact of environmental, economic, social, physical, and health-related indicators on SC and QoL satisfaction among Baku residents. Ultimately, the research will provide recommendations which will further enhance the SC and QoL in Baku City at a number of levels, from empowering communities at a local level to participate in the evolution of their neighborhoods to influence institutional and corporate objectives and sustainability policies. The information collated will feed into the Baku Strategic Planning Process and help to determine developed strategies for urban development and urban regeneration.

Haze with Chinese residents＇ health problems

In recent years, with the acceleration of urbanization, medium-sized cities face increasingly severe, fog and haze increase, the heavy air pollution concentration, which caused acute health problems such as irritation and cardiovascular diseases caused widespread concern in the community. Most scholars believe that the haze is toxic and harmful gases; particulate matter and other pollutants together lead to reduced visibility as the main manifestation of the phenomenon of air pollution. Population health effects caused by the haze have been proven in many studies. The system summarizes the polluting haze weather physicochemical characteristics, introduced widely accepted definition of haze, haze hazard to residents and the proposed requirements.

Backed-up or Bound： Youths in US Chinatowns in Ethnic Literature and in Reality

Targeting the youth group of the American Chinatowns, this paper attempts to explore the continuous interactions of the people and the community on each other. As a result of combined impact of the immigration history of Chinese Americans and the unfolding political and economical reality, a complicated relationship has developed between the growing Chinese immigrants and the Chinatown where they happen to inhabit and influence. Literature and history have captured the interesting development in their specific perspectives and paradigms, between whom the comparison is creatively presented. The great process of modern urbanization of American cities since the 1950s is given serious highlight in shaping the small community as well as the large one. The authors invite further argument on whether the youths are cushioned or bound by the traditional physical and cultural environment, or they bring change to the community in return at the end of the paper. It is suggested that they mature into a beautiful compromise and pride on creating the immigrant legacy characteristic of the great country.

The senior sports situation under the trend of aging process and the strategy of it

abstract： According to the new situation and problems in the aging process, we will try to analyze the current situation and features of the aging process from the point of sociology by investigation and document literature. By analyzing the severe aging problems, we will know about the leisure sporting activities of the old people. Sports is a very useful way to slow down the pace of getting old. Through the efforts of the whole society, we can take full advantage of sports to slow down the aging process and make the senior sports a healthy and scientific development direction. Keywords： population aging Sports Strategy

Microbial Community and Urban Water Quality

Urbanization of China is substantial and growing, and water resources are crucial for both economic and social sustainable development. Unfortunately, the frequency and intensity of water contamination events are increasing at an unprecedented rate and often accompanied by increased pollutant loading due to human activities such as irreversible industrialization and urbanization. The impacts of human pollution are most evident and of greatest concern at the microbial level. The research of the Aquatic Ecohealth Group, Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, has been focusing mainly on aquatic microorganisms in the urban environment, from drinking water and landscape water to waste water. Its projects fall into three categories: biomonitoring and bioassessment, microbial ecology and diversity, ecotoxicology and environmental microbiology. Its scientif ic topics include the aquatic ecological safety and microbial food web.

Statistical measures of genetic differentiation of populations： Rationales, history and current states

Population differentiation is a fundamental process of evolution, and many evolutionary studies, such as population genetics, phylogeography and conservation biology, all require the inference of population differentiation. Recently, there has been a lot of debate over the validity of FST （and its analogue Gsr） as a measure for population genetic differentiation, notably since the proposal of the new index D in 2008. Although several papers reviewed or explored specific features of these statistical measures, a succinct account of this bewildering issue with an overall update appears to be desirable. This is the purpose of the present review. The available statistics generally fall into two categories, represented by Fsv and D, respectively. None of them is perfect in measuring population genetic differentiation. Nevertheless, they each have advantages and are valuable for current re- search. In practice, both indices should be calculated and a comparison of them can generate useful insights into the evolutionary processes that influence population differentiation. FsT （GsT） has some unique irreplaceable characteristics assuring its standing as the default measure for the foreseeable near future. Also, it will continue to serve as the standard for any alternative measures to contrast with. Instead of being anxious about making choice between these indices, one should pay due attention to the equili-brium status and the level of diversity （especially Hs） of the populations, since they largely sway the power of a given statistic to address a specific question. We provide a multi-faceted comparative summary of the various statistics, which can serve as a basic reference for readers to guide their applications [Current Zoology 61 （5）： 886-897, 2015].