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Search Results: 1 - 10 of 18676 matches for " Qing Jiugang "
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Zhao Gang,Wang Jun,He Anhua,Qing Jiugang,

大地测量与地球动力学 , 2009,
Abstract: On the basis of data of 277 countrywide geothermal precursor stations,the response of China geothermal earthquake precursor network to Wenchuan Ms 8.0 earthquake is studied.It is found that there are co-seismic and postseismic changes in 134 stations.According to the form,co-seismic response and postseismic adjustment can be devided into four types:gradual change,step change and resuming,impulse and oscillation.In adition,it is found that the postseismic adjustment of geotherm contains the information of th...

Wang Jun,Zhao Gang,He Anhua,Guo Miaoxi,Guo Bolin,Qing Jiugang,

大地测量与地球动力学 , 2008,
Abstract: It's urgent to integrate the Ninth Five-year Plan digital precursor stations into the Tenth Five-year Plan precursor network after the completion of the Tenth Five-year network.Corresponding to different station conditions,four solutions are proposed to conveniently connect the Ninth Five-year Plan earthquake instruments to the Tenth Five-year Plan earthquake precursor network.Among them the special network interface solution has been applied in Baijiantuan earthquake station in Beijing and has quite an effect.
LoxP-FRT Trap (LOFT): a simple and flexible system for conventional and reversible gene targeting
Chaiyachati Barbara H,Kaundal Ravinder,Zhao Jiugang,Wu Jie
BMC Biology , 2012, DOI: 10.1186/1741-7007-10-96
Abstract: Background Conditional gene knockout (cKO) mediated by the Cre/LoxP system is indispensable for exploring gene functions in mice. However, a major limitation of this method is that gene KO is not reversible. A number of methods have been developed to overcome this, but each method has its own limitations. Results We describe a simple method we have named LOFT [LoxP-flippase (FLP) recognition target (FRT) Trap], which is capable of reversible cKO and free of the limitations associated with existing techniques. This method involves two alleles of a target gene: a standard floxed allele, and a multi-functional allele bearing an FRT-flanked gene-trap cassette, which inactivates the target gene while reporting its expression with green fluorescent protein (GFP); the trapped allele is thus a null and GFP reporter by default, but is convertible into a wild-type allele. The floxed and trapped alleles can typically be generated using a single construct bearing a gene-trap cassette doubly flanked by LoxP and FRT sites, and can be used independently to achieve conditional and constitutive gene KO, respectively. More importantly, in mice bearing both alleles and also expressing the Cre and FLP recombinases, sequential function of the two enzymes should lead to deletion of the target gene, followed by restoration of its expression, thus achieving reversible cKO. LOFT should be generally applicable to mouse genes, including the growing numbers of genes already floxed; in the latter case, only the trapped alleles need to be generated to confer reversibility to the pre-existing cKO models. LOFT has other applications, including the creation and reversal of hypomorphic mutations. In this study we proved the principle of LOFT in the context of T-cell development, at a hypomorphic allele of Baf57/Smarce1 encoding a subunit of the chromatin-remodeling Brg/Brahma-associated factor (BAF) complex. Interestingly, the FLP used in the current work caused efficient reversal in peripheral T cells but not thymocytes, which is advantageous for studying developmental epigenetic programming of T-cell functions, a fundamental issue in immunology. Conclusions LOFT combines well-established basic genetic methods into a simple and reliable method for reversible gene targeting, with the flexibility of achieving traditional constitutive and conditional KO.
Optimal Caliper Width for Propensity Score Matching of Three Treatment Groups: A Monte Carlo Study
Yongji Wang, Hongwei Cai, Chanjuan Li, Zhiwei Jiang, Ling Wang, Jiugang Song, Jielai Xia
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0081045
Abstract: Propensity score matching is a method to reduce bias in non-randomized and observational studies. Propensity score matching is mainly applied to two treatment groups rather than multiple treatment groups, because some key issues affecting its application to multiple treatment groups remain unsolved, such as the matching distance, the assessment of balance in baseline variables, and the choice of optimal caliper width. The primary objective of this study was to compare propensity score matching methods using different calipers and to choose the optimal caliper width for use with three treatment groups. The authors used caliper widths from 0.1 to 0.8 of the pooled standard deviation of the logit of the propensity score, in increments of 0.1. The balance in baseline variables was assessed by standardized difference. The matching ratio, relative bias, and mean squared error (MSE) of the estimate between groups in different propensity score-matched samples were also reported. The results of Monte Carlo simulations indicate that matching using a caliper width of 0.2 of the pooled standard deviation of the logit of the propensity score affords superior performance in the estimation of treatment effects. This study provides practical solutions for the application of propensity score matching of three treatment groups.
Bundling and Consumers’ Reservation Value: Effects on Market Entry  [PDF]
Qing Hu
Technology and Investment (TI) , 2015, DOI: 10.4236/ti.2015.61008
Abstract: We consider a multiproduct incumbent which monopolizes one market but faces a potential entrant in another market. In a two dimensional Hotelling model, when consumers’ reservation value is relatively high, we show that the incumbent has an incentive to use bundling to deter entry only if a prior commitment is applicable. However, when consumers’ reservation value is low, the multiproduct firm even has no incentive to use bundling and bundling has no effect on entry deterrence.
Research on Operation Cost-Benefits of China High-Speed Railway  [PDF]
Qing Yang
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.33009

At Present, to satisfy the demand of passengers travelling convenience, China’s High Speed Railway has entered an unprecedented rapid development period. Under this background, research on operation cost-benefits of china high-speed railway is most important and meaningful. The article concludes the following three parts. The first part is to give the definition of research scope. The second part is to give analysis and evaluation on opening and operation cost-benefits. This part is to give a detailed evaluation indexes system and FAHP calculation model; furthermore, to give an example to illustrate the application of evaluation indexes system and FAHP calculation model. The final part is to give effective suggestions and measures to improve cost-benefits of CRH.

The Relationship between College Students’ Critical Behavior and the Coping Style in China  [PDF]
Qing Zeng
Psychology (PSYCH) , 2017, DOI: 10.4236/psych.2017.814150
Abstract: This study aims to study the relationship between college students’ critical behavior and the coping style in China. 1135 college students from 10 universities in Guangdong were asked to answer the questionnaire on the behaving style in emergency situations and Coping Style questionnaire. The results show that: 1) In the view of gender, admission category, urban and rural sources, whether the only child, and family income point, there were significant differences in the behaviors in emergency situations. 2) The capacities in emergency situations and the coping style are significantly correlative. Meanwhile, the coping styles of self-blame, problem solving, fantasy, rationalization are the distinct predictors for the capacities in emergency situations.
The Performance of China Stock Market, Based on the Analysis of Implicit Transaction Cost  [PDF]
Qing Zhang
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.84072
Abstract: This paper is based on the stocks listed on the Shanghai and Shenzhen stock exchanges for full year in the early period of 1992 to the end of 2016, using Hasbrouck sampling method to estimate the implicit transaction cost of Chinese order-driven market, and observing the performance of stock market and affecting factors based on the implicit transaction costs. Empirical results show: the implicit transaction cost is an unavoidable cost for investors, and the performance of China stock market is not ideal. Finally, it is suggested that China stock market should improve the trading system, strengthen the information disclosure system and optimize the equity system of listed companies.
Mirror Room (Pumpkin)—Yayoi Kusama’s Psychological Space  [PDF]
Qing Guo
Art and Design Review (ADR) , 2019, DOI: 10.4236/adr.2019.71003
Abstract: Yayoi kusama uses aspects of her mental illness in her creation of Mirror Room (Pumpkin) to welcome participants to experience her psychological space.

Zhao Gang,Li Jiang,He Anhua,Wang Jun,Qin Jiugang,
赵 刚
,李 江,何案华,王 军,秦久刚

大地测量与地球动力学 , 2007,
Abstract: In the light of the realization of the network function of SZW-1A(V2004) digital thermometer,a new scheme which makes the precusor instument have the network function is presented.This scheme,keeps the merits of former model and surpports the TCP/IP agreement.It not only meets the need of the Tenth Five-Year Plan in digital precursory seismostation networks but also is very convenient for users.
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