oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 40 )

2018 ( 236 )

2017 ( 213 )

2016 ( 197 )

Custom range...

Search Results: 1 - 10 of 13573 matches for " Nengzhu Fan "
All listed articles are free for downloading (OA Articles)
Page 1 /13573
Display every page Item
Short-Term Precipitation Forecasting Rolling Update Correction Technology Based on Optimal Fusion Correction  [PDF]
Meijin Huang, Qing Lin, Ning Pan, Nengzhu Fan, Tao Jiang, Qianshan He, Lingguang Huang
Journal of Geoscience and Environment Protection (GEP) , 2019, DOI: 10.4236/gep.2019.73008
Abstract: In order to improve the availability of regional model precipitation forecast, this project intends to use the measured heavy rainfall data of dense automatic stations to carry out historical precipitation in the high resolution: the Severe Weather Automatic Nowcast System (SWAN) quantitative precipitation forecast and the High-Resolution Rapid Refresh (HRRR) regional numerical model precipitation forecast in short-term nowcasting aging. Based on the error analysis, the grid fusion technology is used to establish the measured rainfall, HRRR regional model precipitation forecast, and optical flow radar quantitative precipitation forecast (QPF) three-source fusion correction scheme, comprehensively integrate the revised forecasting effect, adjust the fusion correction parameters, establish an optimal correction plan, generate a frozen rolling update revised product based on measured dense data and short-term forecast, and put it into business operation, and perform real-time effect rolling test evaluation on the forecast product.
Convergence Properties of the Preconvex Part of Modified Broyden''s Familiy with a Generalized Wolfe Linesearches
修改Broyden非凸族在一般Wolfe搜索下的收敛性

Wei Zengxin,Xie Pinjie,Gu Nengzhu,
韦增欣
,谢品杰,顾能柱

系统科学与数学 , 2007,
Abstract: Recently,Wei and other authors proposed a class of new quasi-Newton equa- tions B_(k 1)s_k=y_l~*=y_k A_ks_k,where A_k is some matrix,and based on these,they gave two kinds of modified Broyden's familes(MBC).In this paper,generalized Wolfe linesearches proce- dures are used,which are combined with the modified Broyden's family.Under some suitable conditions,we prove the global and superlinear convergence property of the preconvex part of the modified Broyden's family.
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
Abstract:

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.
Page 1 /13573
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.