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Search Results: 1 - 10 of 4913 matches for " Zou Changping "
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Study on Option Price Model of the Transaction of Information Commodities  [PDF]
Changping HU, Xianjun QI
Journal of Service Science and Management (JSSM) , 2009, DOI: 10.4236/jssm.2009.24047
Abstract: The option is viewed as an important tool of setting price in accordance with objective benefits and actual effectiveness of information commodities, as ensures that the holder of the option right acquires more benefits in the favorable market and reduces losses in the adverse market. And the information market, as a kind of typical monopolistic and com-petitive market, is especially adequate for introducing the option theory to set more reasonable price and further to improve the operational efficiency of information market. Hence, it is quite necessary to apply the option theory to the transaction of information commodities. In this paper, after analyzing the applicability of the option theory to the in-formation market and studying the option price of information commodities, the authors put forward the option price model of the transaction, followed by a case study to demonstrate the validity of the model.
Construction of National High-Quality Courses for LIS in China  [PDF]
Changping Hu, Xueqin Zhao
Journal of Service Science and Management (JSSM) , 2010, DOI: 10.4236/jssm.2010.31022
Abstract: The paper first introduces the background of Martin Trow’s theory of how to develop mass higher education and then brings up the necessity of Chinese course teaching reform. It introduces the current situation of the construction of the National High-quality Courses (NHCs) in China. And taking the practice of Wuhan University’s library and information science (LIS) course teaching as an example, the paper also discusses the implementation of this project, focusing on two aspects: a new system of LIS course teaching and network platform construction. The paper concludes by recommending that, for successful LIS NHCs, it is necessary to transform our educational ideology, strengthen our innovation, and set up a more beneficial teaching environment for innovation cultivation.
Relationship between structure and function ofJWA in the modulation of cell differentiation
Xia Wei,Zhou Jianwei,Cao Haixia,Zou Changping,Wang Chengya,Shen Qun,Lu Hua
Chinese Science Bulletin , 2001, DOI: 10.1007/BF02901133
Abstract: To elucidate the structure characteristic, regulation of expression and the potential function ofJWA— a novel retinoic acid responsible and cytoskeleton associate gene, a ratJWA homologue gene and a 621-bpJWA promoter fragment were cloned and analyzed. Using reverse transcription-polymerase chain reaction (RT-PCR),JWA mRNA expression in NIH3T3, K562 and human primary acute promyelocytic leukaemia (APL) cells have been investigated after treatment with all trans retinoic acid (ATRA), N-4-hydroxyphenyl-retinamide (4HPR), arsenic trioxide (As2O3), Phorbol-12-myristate-13-acetate (TPA) and dimethyl sulfoxide (DMSO). The results showed that there is a complete TPA responsive element (TRE) existed in the promoter ofJWA at 437 to 443 bp; ratJWA homologue gene showed that there are four nucleotides different from humanJWA within coding region. After treatment with TPA, an uneven pattern ofJWA transcription existed in different cell lines, suggesting that even TPA induces cell differentiation in different cell lines, and it may be referred to different signal pathways. In ATRA pretreated APL cells, all the above chemicals induce cellular differentiation and down regulateJWA transcriptionin vitro. This suggests that pretreatment of ATRA on APL cells seems a precondition for turning onJWA involved signal pathway.
Role of JWA in acute promyelocytic leukemia cell differentiation and apoptosis triggered by retinoic acid, 12-tetradecanoylphorbol-13-acetate and arsenic trioxide
Haixia Cao,Wei Xia,Qun Shen,Hua Lu,Jian Ye,Aiping Li,Changping Zou,Jianwei Zhou
Chinese Science Bulletin , 2002, DOI: 10.1360/02tb9188
Abstract: JWA, a cytoskeleton associated gene, was primarily found to be regulated by all trans-retinoic acid (ATRA), 13 cis-retinoic acid (13 cis-RA) and 12-tetradecanoylphorbol-13-acetate (TPA). Our previous data showed that JWA might be involved in both cellular differentiation and apoptosis induced by several chemicals. In this study, we addressed the possible mechanism of JWA in the regulation of cell differentiation and apoptosis in NB4, a human acute promyelocytic leukemia cell line. CD11b/CD33 expression and cell cycle were analyzed for detecting of cell differentiation and apoptosis. Both reverse-transcription polymerase chain reaction (RT-PCR) and Western blot assays were used for understanding the expressions of JWA. The results showed that under the indicated concentrations ATRA (10 6 mol/L) and AS2O3 (10 6 mol/L) induced cell differentiation and apoptosis separately; while both 4HPR (10 6 mol/L) and TPA (10 7 mol/L) showed dual-directional effects on NB4 cells, they not only trigger cells’ differentiation but also induce cells apoptosis at the same time. All chemicals up-regulated JWA expression whatever they trigger cells either differentiation or apoptosis; however, it seems that the chemicals have no effect on PML/RARα in the treated NB4 cells. Anti-sense JWA oligonucleotide could partially block the ability of TPA in inducing cell differentiation and apoptosis via direct signal pathway. Interestingly, a high molecular weight JWA protein (JWAF) was identified only in de novo primary APL cells and it was also responsible for ATRA treatment. It raises questions of whether the JWAF is a novel APL specific marker and, how it was involved in the known mechanism of APL.
Cactus pear: a natural product in cancer chemoprevention
Da-ming Zou, Molly Brewer, Francisco Garcia, Jean M Feugang, Jian Wang, Roungyu Zang, Huaguang Liu, Changping Zou
Nutrition Journal , 2005, DOI: 10.1186/1475-2891-4-25
Abstract: Aqueous extracts of cactus pear were used to treat immortalized ovarian and cervical epithelial cells, as well as ovarian, cervical, and bladder cancer cells. Aqueous extracts of cactus pear were used at six concentrations (0, 0.5, 1, 5, 10 or 25%) to treat cells for 1, 3, or 5 days. Growth inhibition, apoptosis induction, and cell cycle changes were analyzed in the cultured cells; the suppression of tumor growth in nude mice was evaluated and compared with the effect of a synthetic retinoid N-(4-hydroxyphernyl) retinamide (4-HPR), which is currently used as a chemoprevention agent. Immunohistochemistry staining of tissue samples from animal tumors was performed to examine the gene expression.Cells exposed to cactus pear extracts had a significant increase in apoptosis and growth inhibition in both immortalized epithelial cells and cancer cells in a dose- and time-dependent manner. It also affected cell cycle of cancer cells by increasing G1 and decreasing G2 and S phases. Both 4-HPR and cactus pear extracts significantly suppressed tumor growth in nude mice, increased annexin IV expression, and decreased VEGF expression.Arizona cactus pear extracts effectively inhibited cell growth in several different immortalized and cancer cell cultures, suppressed tumor growth in nude mice, and modulated expression of tumor-related genes. These effects were comparable with those caused by a synthetic retinoid currently used in chemoprevention trials. The mechanism of the anti-cancer effects of cactus pear extracts needs to be further studied.The goal of cancer prevention is to delay or block the processes of initiation and progression from pre-cancerous cells into cancer. Cancer chemoprevention, which targets normal and high risk populations, involves the use of drugs or other chemical agents to inhibit, delay, or reverse cancer development [1,2]. There has been significant success in the study of cancer prevention and chemoprevention in the last 20 years [1,2] and, as a result
The Modified Negative Decision Number in Graphs
Changping Wang
International Journal of Mathematics and Mathematical Sciences , 2011, DOI: 10.1155/2011/135481
Abstract: A mapping ∶→{?1,1} is called negative if ∑∈[]()≤1 for every ∈. The maximum of the values of ∑∈() taken over all negative mappings , is called the modified negative decision number and is denoted by (). In this paper, several sharp upper bounds of this number for a general graph are presented. Exact values of these numbers for cycles, paths, cliques and bicliques are found.
A degree condition for the existence of -factors with prescribed properties
Changping Wang
International Journal of Mathematics and Mathematical Sciences , 2005, DOI: 10.1155/ijmms.2005.863
Abstract: Let k be an integer such that k≥3, and let G be a 2-connected graph of order n with n≥4k
Voting 'Against' in regular and nearly regular graphs
Changping Wang
Applicable Analysis and Discrete Mathematics , 2010, DOI: 10.2298/aadm100213014w
Abstract: Let $G=(V, E)$ be a graph. A function $f: V(G) o {-1,1}$ is called emph{negative}if ule{-2mm}{0mm}$sumlimits_{vin N[v]}ule{-2mm}{0mm} f(v) le 1$ for every $vin V(G).$A negative function $f$ of a graph $G$ is maximal if there exists no negative function $g$ suchthat $g eq f$ and $g(v)ge f(v)$ for every $vin V.$ The minimum of the values of$sumlimits_{vin V}ule{-1mm}{0mm} f(v),$ taken over all maximal negative functions$f,$ is called the emph{lower against number} and is denoted by $eta_{mathbb{N}}^*(G).$In this paper, we present lower bounds on this number for regular graphs and nearly regulargraphs, and we characterize the graphs attaining those bounds.
Signed b-matchings and b-edge covers of strong product graphs
Changping Wang
Contributions to Discrete Mathematics , 2010,
Abstract: In this paper, we study the signed b-edge cover number and the signed b-matching number of a graph. Sharp bounds on these parameters of the strong product graphs are presented. We prove the existence of an analogue of Gallai's theorem relating maximum-size signed b-matchings and minimum-size signed b-edge covers for the complete graphs and complete bipartite graphs.
A General Method for Large Eddy Simulation in Different Range of Turbulent Flows
Changping Yu
Physics , 2012,
Abstract: Traditional large eddy simulation is based on Kolmogrov's hypothesis, and done in the inertial range. In inertial range the LES model coefficient is scale-invariant. In many cases, such as computing in the boundary layer, the filter scale is not in the inertial range, and the model coefficient changes drastically with the filter scale, thus the assumption of scale-invariance is not proper. In this paper, we propose a general principle of constraint, and then we deduce two concrete constraints based on the existing spectrum theory and priori data. The constrained dynamic Smogorinsky model can predict energy spectrum well in different range of forced and decayed turbulence. Dynamic mixed models with one of the constraints shows more efficient than some classical models in predicting energy spectrum and SGS dissipation, and also displays a strong correlation with the real stress in different range of the turbulent flows.
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