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Search Results: 1 - 10 of 13575 matches for " Enyuan Fan "
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Analysis and countermeasure on proposals for aquatic species in CITES

Xiangguo Fan,Yujing Zhou,Baoxiang Liu,Gengfei Feng,Enyuan Fan,

生物多样性 , 2008,
Abstract: 气候变化、生物多样性及生物资源等方面的热点研究越来越多地涉及到水生生物,<濒危野生动植物种国际贸易公约>(CITES)也日益关注水生野生动物的贸易管理问题.自CITES第九届缔约国大会以来,CITES附录物种的讨论中越来越多地出现水生生物种类,有关的管理机制正在不断完善之中.中国是水生生物的利用大国,CITES对水生生物贸易的管理将会对我国产生深远影响.本文对CITES中水生生物的管理情况进行了回顾,同时结合公约第十四届缔约国人会的最新信息,分析了目前的热点问题,探讨了其对我国水生生物管理的影响.分析结果表明,CITES对水生生物的管理正在不断扩展,力度不断增强,CITES正趋于参与商业开发水生物种的管理.有鉴于此,建议加强水生生物资源利用及管理方面的基础性研究,为资源保护、可持续利用及国家制订公约履约策略提供依据.
The Application of NdFeB in the Magnetic Force Actuator
DONG Enyuan,YIN Guangxiao,WANG Yongxing,DUAN Xiongying
TELKOMNIKA : Indonesian Journal of Electrical Engineering , 2012, DOI: 10.11591/telkomnika.v10i6.1410
Abstract: In this paper, NdFeB is used to design a new type of magnetic force actuator (MFA) with simple structure and high reliability. The permanent magnets are fixed on the static iron-core to generate a magnetic field, while the movable part locates within the magnetic field. It can drive the arc extinguishing unit powered by the Lorentz force, and this can be applied to the operation of the long-stroke high voltage circuit breaker (HVCB). At the open and closed position, the PMs generate holding force for the moving iron-core to keep the static state. Then, the finite element method(FEM) and prototype test are adopted to study the properties of PM and characteristics of the actuator. The simulation concludes that the material type and structure size of PM, end cap material and processing deviation of the actuator will impact the static characteristic of the actuator. The results of the test on prototype show that MFA using NdFeB can achieve the high power output, which is conductive for electronic control as well as the displacement tracking. Due to its stable performance, NdFeB is reliable in the running of the magnetic force actuator.
Research on Plane 2-D Sediment Model of a Watercourse on Yangtze River  [PDF]
Yong FAN
Journal of Water Resource and Protection (JWARP) , 2009, DOI: 10.4236/jwarp.2009.14032
Abstract: To provide basis for sand excavation of hydraulic fill and land forming in Daohukou region in a watercourse (Wuhan reach) on Yangtze River, a 2-D water-sand mathematic model of this river reach is established. The variation of water levels of this reach and the back silting of watercourse after sand excavation are calculated. The rationality of the results calculated by this model and the measured data are validated and analyzed. The results show that, this model is reasonable and reliable.
On Chinese Trainees and Interns in Japan  [PDF]
Jiaoyan Fan
Beijing Law Review (BLR) , 2012, DOI: 10.4236/blr.2012.32008
Abstract: There are millions of Chinese workers in Japan, most as trainees and interns hired in small or medium sized industries. While they work hard and contribute great to the economic development of Japan, there also exist some problems arising from the mechanism which have to be faced by both Japanese and Chinese governments. On analyzing the status of the trainees and interns, the author exposed some problems in the system, and presents some suggestions from the legal view for the future at last.
Use of metformin during pregnancy for women with polycystic ovary syndrome  [PDF]
Howard Fan
Open Journal of Obstetrics and Gynecology (OJOG) , 2013, DOI: 10.4236/ojog.2013.31021

Objective: The purpose of this article is to review the literature assessing foetal and maternal pregnancy outcomes in women with PCOS who used metformin during pregnancy. Study Design: A literature search was conducted using MEDLINE, with analysis of 25 studies that recorded neonatal and maternal outcomes in women who used metformin during pregnancy. The outcomes assessed in this review include congenital deformities, miscarriages, preterm labour, gestational diabetes (GDM) and pregnancy induced hypertension (PIH). Results: We found that the use of metformin throughout pregnancy correlated with decreased rates of preterm labour, GDM and PIH. Conflicting evidence exists over whether metformin use during pregnancy reduced miscarriage rates. The use of metformin during pregnancy did not increase teratogenicity risks. Conclusion: The use of metformin throughout pregnancy is associated with decreased rates of preterm labour, GDM, and PIH. However, more randomised controls involving larger numbers of participants are required for more definitive results.

The Scientificalization and Vulgarization of Marxism in the 20th Century: A Critical Analysis on K. Popper’s Critique of Marxism  [PDF]
Fan Chang
Open Journal of Philosophy (OJPP) , 2013, DOI: 10.4236/ojpp.2013.34069
Abstract: Marxism was indeed vulgarized due to scientism in the 20th century, which even limits the development of Chinese social theories nowadays. This paper put forward the idea that it was serious misunderstanding to interpret Marx as prophet or inventor like empiricists who regard finding out eternal laws as the goal of science. In fact, Marx did not propose any so-called “natural laws of historical development”. He articulated that the only thing worth to do was to take note of what happened before his eyes and to become its mouthpiece. Thus, to understand science in the face of social practice, to analyze everything historically and never to thrust “eternal” laws in any era should be taken as the core of Marx’s new science, which is very important to China today.
Coordinated Control of Traffic Signals for Multiple Intersections  [PDF]
Liqiang Fan
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.513197
Abstract: The proper phase difference of traffic signals for adjacent intersections could decrease the time of operational delay. Some theorems show how to minimize the total average delay time for vehicle operating at adjacent intersections under given conditions. If the distance and signal cycles of adjacent intersections satisfy with specific conditions, the total average delay time would achieve zero. If the signal cycles of adjacent intersections and the phase difference of them are co-prime numbers, the total average delay time would be a constant. In general, if signal cycles of adjacent intersections and the phase difference of them are reducible numbers, the minimum total average delay time would be solved by the given algorithm. Numerical experiments have verified the rationality of these theorems.
Spectral Analysis of Water Reflectance for Hyperspectral Remote Sensing of Water Quailty in Estuarine Water  [PDF]
Chunlei Fan
Journal of Geoscience and Environment Protection (GEP) , 2014, DOI: 10.4236/gep.2014.22004
Abstract: Hyperspectral remote sensing offers an effective approach for frequent, synoptic water quality measurements over a large spatial extent. However, the optical complexity of case 2 water makes the water quality monitoring by remote sensing in estuarine water a challenge. The prime objective of this study was to develop algorithms for hyperspectral remote sensing of water quality based on in situ spectral measurement of water reflectance. In this study, water reflectance spectra R(λ) were acquired by a pair of Ocean Optic 2000 spectroradiometers during the summers from 2008 to 2011 at Patuxent River, a tributary of Chesapeake Bay, USA. Simultaneously, concentrations of chlorophyll a and total suspended solids (TSS), as well as absorption of colored dissolved organic matter (CDOM) were measured. Empirical models that based on spectral features of water reflectance generally showed good correlations with water quality parameters. The retrieval model that using spectral bands at red/NIR showed a high correlation with chlorophyll a concentration (R2 = 0.81). The ratio of green to blue spectral bands is the best predictor for TSS (R2 = 0.75), and CDOM absorption is best correlated with spectral features at blue and NIR regions (R2 = 0.85). These empirical models were further applied to the ASIA Eagle hyperspectral aerial imagery to demonstrate the feasibility of hyperspectral remote sensing of water quality in the optical complex estuarine waters.
The Impact of Economic Capital, Social Capital and Cultural Capital: Chinese Families’ Access to Educational Resources  [PDF]
Jingbo Fan
Sociology Mind (SM) , 2014, DOI: 10.4236/sm.2014.44028
Abstract: Family background can influence an individual’s access to educational resources. Specifically, an advantaged family background can promote an individual’s access to educational resources. This study constructs a model to analyze the impact of the economic, social and cultural capital of Chinese families on their children’s education. The results show that all three types of capital have significant effects on individual education but a family’s cultural capital has the strongest effect. Furthermore, the father’s background influences a child’s education more than the mother’s for all three types of capital. The present study affirms the importance of the resource-centered conception of economic, social and cultural capital that significantly influences inequality as a predominant issue in China.
Judges’ Continuing Construction in Enterprise-Conditioned Employer Dismissal in Germany: Specific Research of the Proportion Principle  [PDF]
Jianhong Fan
Beijing Law Review (BLR) , 2014, DOI: 10.4236/blr.2014.54030
Abstract: A common theme must be ensuring equity to protecting the job security of employees, when the enterprise owners implement the dismissal right due to enterprises reasons. There are yet many problems needing to be solved in the interpretation, application, construction and supplementation of the norm of “social rationality” according to German Federal Dismissal Protection Statute. It is important to Germany itself but will also have far-reaching effects on foreign countries that have enterprise in Germany. Nevertheless, it is not easy for designing a new control structure for such dismissal. In this paper, a legislative space of social rationality could be continuingly constructed or supplemented successfully. This should thus be welcomed by international judges, lawyers and citizens.
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