Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2019 ( 72 )

2018 ( 839 )

2017 ( 828 )

2016 ( 779 )

Custom range...

Search Results: 1 - 10 of 52105 matches for " Yan Fu "
All listed articles are free for downloading (OA Articles)
Page 1 /52105
Display every page Item
Conservation for the landscape ecological diversity in Wulingyuan scenic area of China
Yan Fu,

环境科学学报(英文版) , 2003,
Abstract: Wulingyuan is located at the mountainous area of the middle reach of the Yangtze River, it is one of the three nature heritages in China which ranks in the "List of World's Heritage" by UNESCO. It is characterized by quartz sandstone peaks landform with several landform components (pattern, corridor) and rich in landscape ecological diversity and biodiversity. The main patterns (ecosystem) include mid-height mountain peaks, rift-valley and streams among peaks, peaks and gullies on slopes, square mountain-platforms and peaks among blind valleys and so on. The corridor system consists of natural corridors and artificial corridors among which the stream corridors account for a major part. The fracturing of habitat is unfavorable for the biodiversity conservation, but meanwhile the habitat diversity leads to an increase in biodiversity. Therefore, it is still rich in landscape ecological diversity in Wulingyuan. The biodiversity at the level of landscape component (ecosystem) and the function of the Wulingyuan complex ecosystem, and the measures for the biodiversity conservation in Wulingyuan ecotourism area are discussed in this paper.
Yan Lei,Chuan Fu
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811001656
Abstract: The title compound, C14H10Cl2N2O, was prepared from the reaction of 2-chlorobenzaldehyde with 3-chlorobenzohydrazide in methanol. The molecule adopts an E configuration about the methylidene unit and the two aromatic rings form a dihedral angle of 13.8 (2)°. In the crystal, molecules are linked via intermolecular N—H...O and C—H...O hydrogen bonds, forming chains along the c axis.
Simulation Research of a Priority Satellite BTDAMA-FD Protocol
YanFang Fu,PeiFeng Yan
Information Technology Journal , 2013,
Abstract: With the development of military space technology, space-based system plays an increasingly important role in the Ground Combat. According to characteristics of the space-based tactical communication network, high priority network group sites often need faster rate to get capacity for emergency data transmission, this study puts forward a suitable priority strategy for different priority needs of ground group after deeply analyzing the space-based tactics and BTDAMA protocol based on which this study establish a priority model applying to BTDAMA with combined Free and Demand (BTDAMA-FD) that is called priority BTDAMA-FD. This study particularly introduced the implementation process of priority BTDAMA-FD in OPNET Modeler software. Finally, by analyzing the simulation results via compare with the performance of standard BTDAMA-FD protocol, the simulation result can verify that the priority BTDAMA-FD has a better delay/throughput property.
An AATP Model Based on CTP for Two-stage Production System
Lixi Yang,Yan Fu
International Journal of Business and Management , 2009, DOI: 10.5539/ijbm.v3n4p11
Abstract: To realize that enterprise can quickly respond customer orders and ensure the reliability and optimization of the promise, in this article, we put forward a model of AATP (Allocated Available to Promise) based on CTP (Capacity to Promise). Aiming at some disadvantages in the quick response of order and comprehensive optimization, this model allocate future capacity to forecasted demands through considering market forecasted demands and comprehensively thinking over some restrictions such as enterprise object, material supply and capacity. The model establishes AATP for customer sales representative and offers the material requirement plan and the capacity requirement plan to ensure order promise. This model can support quick, reliable and optimized order promise decisions and realize synchronized procurement, production and sale for the enterprise.
A Uniaxial Loading Device for Studying Mechanoresponses of Single Plant Cell  [PDF]
Liqing Zhu, Xue Fu, Jie Yan, Junyu Liu
Engineering (ENG) , 2013, DOI: 10.4236/eng.2013.510B085

A system which consists of a loading chamber unit, displacement sensor, data collector and processor, and a feedback control, was established for applying mechanical forces to single plant cells. The method works by compressing an agar cell-suspension block between parallel surfaces through using a force-feedback control circuit coupled to a microchip, delivering the pre-defined. The actual controlled stimulus is achieved whilst measuring the force being imposed on the cell, and its deformation. TheArabidopsisprotoplasts were utilized to test the system. It provides an experimental approach to investigate the mechanoresponses of plant cellsin vitroconditions.

Study on Seismic Fragility Analysis for Piping of CEFR  [PDF]
Zhiwei Fu, Yahua Qiao, Long Tang, Yan Chen, Jiaxu Zuo
Journal of Applied Mathematics and Physics (JAMP) , 2013, DOI: 10.4236/jamp.2013.16016
Abstract: This paper introduces the conception of seismic fragility, gives the model of seismic fragility analysis, and places emphasis on discussing quantization process of seismic fragility parameters. Then, establishes 3D model of pipes of Chinese Experimental Fast Reactor (CEFR) accident residual heat removal system, and obtains the stresses which are essential for calculating seismic fragility parameters. Finally, combined with quantitative methods of seismic fragility, calculates the safety factors and uncertainties of CEFR pipeline, and obtains the system seismic fragility parameters: Am = 2.42 g, βr = 0.36, βu = 0.44, HCLPF = 0.65 g. The results show that: the pipeline of CEFR accident residual heat removal system has high seismic capacity.
Reconstruction of Sub-Decadal Winter Half-Year Temperature during 1651-2010 for the North China Plain Using Records of Frost Date  [PDF]
Junhui Yan, Quansheng Ge, Haolong Liu, Jingyun Zheng, Hui Fu
Atmospheric and Climate Sciences (ACS) , 2014, DOI: 10.4236/acs.2014.42024

We extracted 374 pieces of records of frost date from historical documents. Using these records, we reconstructed winter half-year (October to next April) temperature series, with a resolution of 5-year, for the North China Plain during 1651-2010. The results show that the temperature changes in the North China Plain were divided into four phases. With the reference period of 1951-1980, two cold phases, 1651-1700 and 1781-1900, have cold anomaly of 0.83°C and 0.60°C respectively. However, between the two cold phases, 1701-1780 was a relative warm phase with the cold anomaly of 0.36°C referring to the mean of 1951-1980. After the 1900, the climate came into a warm phase. The mean temperature of 1901-2010 was 0.11°C higher than the mean of 1951-1980. During 1651-2010, the 1996-2000 is the warmest 5-year with the warm anomaly of 1.25°C than that of the reference period of 1951-1980.

The Effect of University Teachers’ Workplace Spirituality on Employee Engagement: Professional Commitment as Mediator  [PDF]
Jianglin Ke, Fengju Zhang, Xiaocen Yan, Ya Fu
Creative Education (CE) , 2017, DOI: 10.4236/ce.2017.813145
Abstract: The current research on workplace spirituality effect is mainly carried out in the west, lacking evidence of China background and attention to university teachers, although the groups are called soul engineer in China. In order to test the effect of workplace spirituality on employee engagement of Chinese university teachers, this study collected239 samples by convenient sampling. The results of structural equation model test showed that the workplace spirituality of university teachers had a positive impact on their engagement, in which professional commitment played a partly mediating role. The results suggest that universities should strengthen their spirituality construction through various strategies.
Plasmodium yoelii blood-stage primes macrophage-mediated innate immune response through modulation of toll-like receptor signalling
Yong Fu, Yan Ding, Taoli Zhou, Xiaolan Fu, Wenyue Xu
Malaria Journal , 2012, DOI: 10.1186/1475-2875-11-104
Abstract: BALB/c mice were infected with non-lethal strain Plasmodium yoelii 17XNL or lethal strain P. yoelii 17XL. Peritoneal macrophages were isolated to study its immune response to pRBC lysate, and TLRs (TLR2, TLR4, and TLR9) agonists, and the expression of TLRs and intracellular signalling molecules were also investigated by flow cytometry and semi-quantitive RT-PCR.The reactivity of peritoneal macrophages from the mice infected with lethal strain P. y 17XL or non-lethal strain P. y 17XNL were enhanced to pRBC lysate, and TLR2, TLR4, and TLR9 agonists at one, three and five days post-infection. Of all the tested TLRs, only TLR2 was up-regulated on peritoneal macrophages of mice infected with either strain. However, transcription of intracellular signalling molecules MyD88, IRAK-1, and TRAF-6 was significantly up-regulated in peritoneal macrophages from mice infected either with P. yoelii 17XL or P. yoelii 17XNL at one, three and five days post-infection. However, the enhanced TLRs response of macrophage from P. yoelii 17XNL-infected mice persisted for a much longer time than that from P. yoelii 17XL-infected mice.Both P. yoelii 17XL and 17XNL strains could enhance the response of peritoneal macrophages to pRBC lysate and TLR agonists, through up-regulating the expression of TLR2 and intracellular signalling molecules MyD88, IRAK-1, and TRAF-6. In addition, prolonged high response of macrophage from P. yoelii 17XNL-infected mice might be associated with the more efficiently controlling of P. yoelii 17XNL growth in mice at early stage.Malaria remains one of the most devastating diseases worldwide, with ~40% of the population at risk, and 200-300 million new cases each year, resulting in about one million deaths annually [1]. The causative agents of malaria are parasitic protozoa belonging to the genus Plasmodium. Except for the virulence of infected malaria parasite, presentation of clinical malaria is mainly dependent on the balance between pro- and anti-inflammatory resp
On the Integration Schemes of Retrieving Impulse Response Functions from Transfer Functions
Kui Fu Chen,Yan Feng Li
Mathematical Problems in Engineering , 2010, DOI: 10.1155/2010/143582
Abstract: The numerical inverse Laplace transformation (NILM) makes use of numerical integration. Generally, a high-order scheme of numerical integration renders high accuracy. However, surprisingly, this is not true for the NILM to the transfer function. Numerical examples show that the performance of higher-order schemes is no better than that of the trapezoidal scheme. In particular, the solutions from high-order scheme deviate from the exact one markedly over the rear portion of the period of interest. The underlying essence is examined. The deviation can be reduced by decreasing the frequency-sampling interval. 1. Introduction Some linear dynamic systems are described at first in the frequency domain (FD) via the frequency response function (FRF) or transfer function . For example, the characteristic of an unbounded media is relatively conveniently described in FD, as are the cases of soil-structure interaction and crack analysis [1–6]. Another salient example is where the transfer function is modified directly in FD to match some special material properties, as is the case of a hysteretic damping model [7–12]. The media property of attenuating wave propagation is also easily described via the FD expression [13]. The unitary impulse response function (UIRF) is the inverse Fourier transform of the FRF as or the inverse Laplace transform Here the real number is the convergence abscissa, that is, all the poles lie on the left side of . Though and are equivalent for describing a linear time invariant system, sometimes, is preferred, such as when inspecting the system causality, or computing in time domain [3, 7, 8, 12, 14]. For simple cases, the transform from to can be carried out analytically [15–17]. But from an engineering point of view, a numerical approach is recommended, especially when the closed-form solutions do not exist, for example, in the case of an ideal hysteretic model [8–11]. The numerical inverse Laplace transform (NILT) appears in many engineering problems [18, 19], and lots of algorithms have been constructed. Novel approaches are still developing, for example, Wang’s approach based on the wavelet [20]. The first issue in implementing the NILT is the infinite integral bound of (1.2). This is addressed by choosing a large enough to accommodate the essential part of , and ignoring contribution beyond the , that is, Provided that attenuates very fast as , and is large enough, then the approximation (1.3) is acceptable. Otherwise, if attenuates slowly, then, even if is very small for , we cannot ignore the truncating error arbitrarily, because
Page 1 /52105
Display every page Item

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