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Search Results: 1 - 10 of 20618 matches for " Rong Zeng "
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The Characters and Structure of Readers of Freely Charged Newspaper
Rong Zhang,Fanbin Zeng
Asian Social Science , 2011, DOI: 10.5539/ass.v7n10p141
Abstract: This studies focus if any relationships of substitution, replacement, and complementarities between freely provided newspaper and the charged newspaper markets. To answer this question, an investigation of what character of these free charged newspaper readers and how this group is structured are needed. This research, in the subject of the readers of Guangzhou Metro, through random sampling selected, received 225 copies of effective papers. This research discovers that, from the point view of characters of free charged newspaper readers as Guangzhou Metro, it is mainly young instead of rich which is as the publisher claimed; And from the point view of the existence of the group structure, according to the relationship with traditional charged newspaper, readers could be divided into three groups: cumulative readers, substitutive readers, new readers. In these three groups, cumulative readers occupy the highest fraction, substitutive readers’ turn up, is not in a high rate, and mainly in partial replacement, new readers’ group supports the traditionally charged newspapers in an oblique way. This report shows that freely charged newspapers haven’t post a threat to the traditional charged newspaper, and have double effect of replacement and complementation, the latter effect being bigger than the former.
A Local Discontinuous Galerkin Method for 1.5-Dimensional Streamer Discharge Simulations
Chijie Zhuang,Rong Zeng
Physics , 2009, DOI: 10.1016/j.amc.2013.03.118
Abstract: Streamer discharges are important both in theory and industry applications. This paper proposed a local discontinuous Galerkin method to simulate the convection dominated fluid model of streamer discharges. To simulate the rapid transient streamer discharge process, a method with high resolution and high order accuracy is highly desired. Combining the advantages of finite volume and finite element method, local discontinuous Galerkin method is such a choice. In this paper, a simulation of a double-headed streamer discharge in nitrogen was performed by using 1.5-dimensional fluid model. The preliminary results indicate the potential of extending the method to general streamer simulations in complex geometries.
A positivity-preserving scheme for the simulation of streamer discharges in non-attaching and attaching gases
Chijie Zhuang,Rong Zeng
Physics , 2013, DOI: 10.4208/cicp.210213.300413a
Abstract: Assumed having axial symmetry, the streamer discharge is often described by a fluid model in cylindrical coordinate system, which consists of convection dominated (diffusion) equations with source terms, coupled with a Poisson's equation. Without additional care for a stricter CFL condition or special treatment to the negative source term, popular methods used in streamer discharge simulations, e.g., FEM-FCT, FVM, cannot ensure the positivity of the particle densities for the cases in attaching gases. By introducing the positivity-preserving limiter proposed by Zhang and Shu \cite{ppl} and Strang operator splitting, this paper proposed a finite difference scheme with a provable positivity-preserving property in cylindrical coordinate system, for the numerical simulation of streamer discharges in non-attaching and attaching gases. Numerical examples in non-attaching gas (N$_2$) and attaching gas (SF$_6$) are given to illustrate the effectiveness of the scheme.
华西口腔医学杂志 , 2007,
Abstract: 目的探讨B级脉动真空压力蒸汽台式灭菌器对牙科手机的灭菌效果。方法分析牙科手机灭菌器的选择、灭菌处理流程及灭菌效果监测,并对监测结果及牙科手机有效的灭菌方法进行评价。结果四川大学华西口腔医院采用B级脉动真空压力蒸汽台式灭菌器对牙科手机进行灭菌处理,其化学监测、生物监测指标均符合要求,灭菌有效率100%;对灭菌后牙科手机进行需氧培养、厌氧培养、乙型肝炎标志物监测均为阴性。结论对牙科手机采用B级台式灭菌器脉动真空压力蒸汽灭菌是行之有效的方法。
Synchronization between different motifs

Li Ying,Liu Zeng-Rong,

中国物理 B , 2010,
Abstract: In this paper, we study the synchronization between different motifs. First, the synchronization between two networks with different topology structures and different dynamical behaviours is studied. With the open-plus-closed-loop(OPCL) method, conditions for two different networks to realize synchronization are given. Then based on the theoretical results achieved, the synchronization between different motifs is studied, which verifies the effectiveness and feasibility of the synchronization scheme.
A blow up result for viscoelastic equations with arbitrary positive initial energy
Ma Jie,Mu Chunlai,Zeng Rong
Boundary Value Problems , 2011,
Abstract: In this paper, we consider the following viscoelastic equations with initial condition and zero Dirichlet boundary condition. Using the concavity method, we obtained sufficient conditions on the initial data with arbitrarily high energy such that the solution blows up in finite time.
Development and Application of Integrated Optical Sensors for Intense E-Field Measurement
Rong Zeng,Bo Wang,Ben Niu,Zhanqing Yu
Sensors , 2012, DOI: 10.3390/s120811406
Abstract: The measurement of intense E-fields is a fundamental need in various research areas. Integrated optical E-field sensors (IOESs) have important advantages and are potentially suitable for intense E-field detection. This paper comprehensively reviews the development and applications of several types of IOESs over the last 30 years, including the Mach-Zehnder interferometer (MZI), coupler interferometer (CI) and common path interferometer (CPI). The features of the different types of IOESs are compared, showing that the MZI has higher sensitivity, the CI has a controllable optical bias, and the CPI has better temperature stability. More specifically, the improvement work of applying IOESs to intense E-field measurement is illustrated. Finally, typical uses of IOESs in the measurement of intense E-fields are demonstrated, including application areas such as E-fields with different frequency ranges in high-voltage engineering, simulated nuclear electromagnetic pulse in high-power electromagnetic pulses, and ion-accelerating field in high-energy physics.

Zhu Zeng-Rong,

生态学报 , 1991,
Abstract: 在白背飞虱(Sogatella furcifera(Hovàrth))卵内,稻虱缨小蜂(Anagrus nilparvatae Pang et Wang)的发育起点温度为10.6℃,有效积温为162.3日度,随着温度上升,发育加快;寿命(y_1,D_(10.4)~0C)、产卵量(y_2,粒/♀)、产出卵率则在适宜温度范围(23—26℃)内最大,高低温区内均呈下降趋势,其方程分别为:y_1=exp(-0.04187+0.3612x-7.4654×10~(-3)x~2),y_2=exp(-1.9539+0.4563x-0.01001x~2),式中x为温度。温度对未产出卵量影响不显著;对子代雌性比的影响也不显著,其平均值为0.7631。温度主要通过对产卵量和产卵速率来影响繁殖力,理论上27.3℃时周限增长率λ最大,达1.2374倍/天。成虫期供蜜加水时的产卵量、产出卵率和寿命显著比仅供水时的高或长。此研究为预测害虫种群发展,充分利用天敌资源,达到综合管理害虫提供了科学依据。
Identification of two-dimensional electrophoresis-separated proteins in human hepatoma cell by electrospray ion trap mass spectrometry
Rong Zeng,Lirong Yu,Xiaoxia Shao,Qichang Xia
Chinese Science Bulletin , 2000, DOI: 10.1007/BF02898899
Abstract: As one of the most important analytical methods in proteome research, mass spectrometry was utilized to identify proteins separated by two-dimensional electrophoresis in the human hepatoma cell line BEL-7404. The protein spots were excised from the gel, followed by in-gel digestion, and the peptide mappings were analyzed by liquid chromatography electrospray ion trap mass spectrometer. Nine proteins were identified via database searching, according to the molecular weights and amino acid sequences of peptides, among which two proteins have not been identified in the other liver-cell database. The sequence coverage was 21% –72%. Furthermore, the relationship between the expressed proteins and the liver carcinoma was discussed.
Identification and Association of the Single Nucleotide Polymorphisms in Calpastatin (CAST) Gene with Carcass Traits in Chicken
Yao-Dong Hu,Zeng-Rong Zhang,Qing Zhu
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2011.2968.2974
Abstract: Calpastatin (CAST) is a naturally occurring protein that inhibits normal tenderization of meat as it ages postmortem. The aim of this study was to investigate the effect of CAST gene polymorphisms on chicken carcass traits. The researchers screened CAST Single Nucleotide Polymorphisms (SNP) in 359 meat type quality chickens from 5 commercial pure lines (S01, S02, S03, S05 and D99; developed from Chinese local breeds), 3 crossbreeds (S01xS05, S01xS10 and S01xD99) and 4 native breeds from Guangdong (Fengkai Xinghua chicken, Huiyang Huxu chicken, Qingyuan Ma chicken) and Guangxi province (Xiayan chicken) in China. Three SNPs (36127T>C, 37752A>T and 37868G>A) were detected by Single Strand Conformation Polymorphism (SSCP) method and DNA sequencing. The linkage disequilibrium analyze found that only 37868G>A SNP in Hardy-Weinberg equilibrium yet one SNP can not compose haplotype, therefore these three SNPs should be analyzed separately rather than as haplotypes. Association analysis showed that the 37752A>T genotypes were significantly associated with Body Weight (BW), Carcass Weight (CW), Breast Muscle Weight (BMW) and Leg Muscle Weight (LMW). The results suggest that CAST SNP is significantly associated with carcass trait in the twelve studied populations and could be useful in selection for changing meat quality in chicken. Further investigations on more chicken populations with larger sample size are needed to confirm this conclusion.
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