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Search Results: 1 - 10 of 50953 matches for " Wei Jianhe "
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A Model of Fuzzy Normal Distribution  [PDF]
Haoge Liu, Jianhe Guan
Open Journal of Statistics (OJS) , 2016, DOI: 10.4236/ojs.2016.65061
Abstract: Nowadays fuzzy concepts are frequently used as statistical parameters, while the traditional normal distribution can only accept determinate variable. In order to design a practical model for fuzzy statistic events, this paper combines the fuzzy number, like “may-occur”, “very-likely-occur”, “rarely-occur”, to optimize the normal distribution probability density function, to provide a significant method in statistics.
Pure Listening Training—A Tentative Innovation of English Learning
Jianhe Ma
Theory and Practice in Language Studies , 2011, DOI: 10.4304/tpls.1.6.729-731
Abstract: A worthwhile teaching and learning method means quite a lot for the fruitful study. As a science of cultural communication, the language acquisition involves various aspects such as listening, speaking, reading, writing and translating, etc. Though the traditional reading training makes the language learners comparatively skillful in their practice of reading, writing and translating, it still fails to meet the needs for them to perfect their listening, speaking ability. Here the paper introduces another language learning method--pure listening training---hoping to provide some actual aids for the English language learners.
On Vague Reference in College English
Jianhe Ma
English Language Teaching , 2011, DOI: 10.5539/elt.v4n1p240
Abstract: We often come across examples of vague reference in English learning, especially college English learning. On entering college, students tend to feel at a loss since their vocabulary is required to be enlarged rapidly and a variety of reference patterns are included in their learning materials which mostly come from American and European original works. Trying to break away from those traditional researches, this paper proposes to generalize the concept of reference from the perspective of pragmatic functions and analyzes a variety of vague reference phenomena.
Comparison of Compositions and Antimicrobial Activities of Essential Oils from Chemically Stimulated Agarwood, Wild Agarwood and Healthy Aquilaria sinensis (Lour.) Gilg Trees
Huaiqiong Chen,Yun Yang,Jian Xue,Jianhe Wei,Zheng Zhang,Hongjiang Chen
Molecules , 2011, DOI: 10.3390/molecules16064884
Abstract: The composition and antimicrobial activity of the essential oils which were obtained from agarwood originated from Aquilaria sinensis (Lour.) Gilg stimulated by the chemical method (S1) were characterized, taking wild agarwood (S2) and healthy trees (S3) respectively as the positive and negative controls. The chemical composition of S1 was investigated by gas chromatography-mass spectrometry (GC-MS). The essential oil of S1 showed a similar composition to that of S2, being rich in sesquiterpenes and aromatic constituents. However, the essential oil of S3 was abundant in fatty acids and alkanes. Essential oils of S1 and S2 had better inhibition activities towards Bacillus subtilis and Staphyloccus aureus, compared with essential oil of S3. Escherichia coli was not sensitive to any of them.
Calibration of Hot-Film X-Probes
X型热膜探头的标定

Zhou Jianhe,Sun Kuihu,Shu Wei,
周建和
,孙葵花

实验力学 , 1994,
Abstract: Two typical calibration methods for X-Probes are studied in this peper. Theseareeffective angle calibration method and full relocity vs yaw angle calibration method. Theinaccuracy of the results caned by each method is discuss and a compatision of results obtsinedfrom the above two methods is made.
Cloning of Critical Gene Fragments in Saikosaponin Biosynthesis and Associated Sequence Analysis
柴胡皂苷合成途径中三个关键酶基因片段的克隆与序列分析

Dong Lemeng,Liu Yujun,Wei Jianhe,
董乐萌
,刘玉军,魏建和

世界科学技术-中医药现代化 , 2008,
Abstract: cDNA fragments,encoding HMGR,IPPI and FPS in Bupleurum chinense DC.were amplified by RT-PCR with the total RNA of the young roots as a template,cDNA fragments of HMGR (GenBank accession no.EU400217),IPPI (EU400218),and FPS (EU400219) were 470bp,532bp,466bp in length,encoding 157,177,155 amino acids respectively.The deduced amino acid sequence of cDNA encoding HMGR,IPPI and FPS showed the highest amino acid identity to E.ulmoides (93%),B.falcatum (99%),and C.asiatica (97%) respectively.The deduced amino acid...
VISCOELASTICITY OF ELECTRORHEOLOGICAL FLUIDS UNDER OSCILLATORY SHEAR
振荡剪切力作用下的电流变流体黏弹性研究

XU Wei,GAO Jianhe,ZHANG Ming,
徐伟
,高建和,张明

力学与实践 , 2008,
Abstract: Electrorheological fluids are new intelligent materials. They are of great significance to study the viscoelastic properties of ER devices in an electric field. In this paper, forced ocsillation experiments of electrorheological fluids have been studied by HAAKE RS600 rheometer and the changes of ERF storage modulus, loss modulus and loss factor with shear stress and shear frequency are obtained for different shear stress rates and oscillation frequencies.
Research and Application of FAHP in Bidding Quotation for Petroleum Geophysical Prospecting Project  [PDF]
Jing Wang, Jianhe Guan, Donglin Liu
Open Journal of Statistics (OJS) , 2017, DOI: 10.4236/ojs.2017.74040
Abstract:
This paper mainly talks about the main layer analytical method, and fuzzy comprehensive evaluation, fuzzy hierarchical analysis (AHP) method of a deeper connotation, and further discusses its application in bidding quotation for petroleum geophysical prospecting project. Fuzzy analytic hierarchy process (FAHP) integrates many merits of AHP and fuzzy comprehensive evaluation organically. It determines the weight of each affecting factor using analytic hierarchy process at first, and then uses the fuzzy comprehensive evaluation method to determine each scheme index. FAHP can effectively enhance the decision-making efficiency.
A Second-Order Boundary Value Problem with Nonlinear and Mixed Boundary Conditions: Existence, Uniqueness, and Approximation
Zheyan Zhou,Jianhe Shen
Abstract and Applied Analysis , 2010, DOI: 10.1155/2010/287473
Abstract: A second-order boundary value problem with nonlinear and mixed two-point boundary conditions is considered, , , , in which is a formally self-adjoint second-order differential operator. Under appropriate assumptions on , , and , existence and uniqueness of solutions is established by the method of upper and lower solutions and Leray-Schauder degree theory. The general quasilinearization method is then applied to this problem. Two monotone sequences converging quadratically to the unique solution are constructed. 1. Introduction The investigation of boundary value problems (denoted as BVPs for short) of ordinary differential equations is of great significance. On one hand, it makes a great impact on the studies of partial differential equations [1]. On the other hand, BVPs of ordinary differential equations can be used to describe a large number of mechanical, physical, biological, and chemical phenomena; see [2–5] for example. So far a lot of work has been carried out, including second-order, third-order, and higher-order BVPs with various boundary conditions. As far as we know, for a long term most of works focused on existence and uniqueness of solutions. The works relating to approximation of solutions are relatively rare. In recent years, some approximate methods, such as the shooting method [6], monotone iterative technique [7], homotopy analysis method [8], and general quasilinearization method have been applied to BVPs for obtaining approximations of solutions. Among these methods, the general quasilinearization method becomes more and more popular. The quasilinearization method was originally proposed by Bellman and Kalaba [9]. It is a very powerful approximation technique and unlike perturbation methods, is not dependent on the existence of a small or large parameter. The method, whose sequence of solutions of linear problems convergences to the solution of the original nonlinear problem, is quadratic and monotone, which is one of the reasons for the popularity of this technique. This method was generalized by Lakshmikantham and Vatsala [10] in which the convexity or concavity assumption on the nonlinear functions involved in the problems is relaxed. So far, the general quasilinearization method, coupled with the method of upper and lower solutions, has been applied to obtain approximation of solutions for a large number of nonlinear problems, for example, BVPs of ordinary differential equations, such as first-order BVP with nonlinear boundary condition [11] and second-order BVPs with Dirichlet boundary condition [12], periodic boundary
Hopf Bifurcation Analysis and Approximation of Limit Cycle in Coupled Van Der Pol and Duffing Oscillators
Jianping Cai and Jianhe Shen
The Open Acoustics Journal , 2008, DOI: 10.2174/1874837600801010019]
Abstract: Using Routh-Hurwitz criterion and Hopf bifurcation theorem, stability of the equilibrium points and Hopf bifurcation of coupled van der Pol and Duffing oscillators are investigated. The parametric curve corresponding to Hopf bifurcation and the existence region for the limit cycle in the parameter space are derived. The method of multiple time scales is used to deduce the analytical approximation of the limit cycle, and the accuracy of the analytical approximation is verified by direct numerical integration.
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