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Identity-based authentication protocol for grid

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Journal of Systems Engineering and Electronics 2008年第4期19卷 860-864,F0003页

作者： Li Hongwei Sun shixin yang Haomiao Coil of Computer Science and Engineering Univ. of Electronic Science and Technology of ChinaChengdu 610054 P. R. China

Current grid authentication frameworks are achieved by applying the standard SSL authentication protocol （SAP）. The authentication process is very complicated, and therefore, the grid user is in a heavily loaded point both in computation and in communication. Based on identity-based architecture for grid （IBAG） and corresponding encryption and signature schemes, an identity-based authentication protocol for grid is proposed. Being certificate-free, the authentication protocol aligns well with the demands of grid computing. Through simulation testing, it is seen that the authentication protocol is more lightweight and efficient than SAP, especially the more lightweight user side. This contributes to the larger grid scalability.

关键词： grid identity-based cryptography authentication gridsim.

Is the quality of female auditors really better? Evidence based on the Chinese A-share market

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China Journal of Accounting Research 2018年第4期11卷 325-350页

作者： shixin yang Yunguo Liu Qiongdan Mai Sun Yat-sen Business School Sun Yat-sen University School of Business Administration Guangxi University of Finance and Economics Center for Accounting Finanace and Institutions Sun Yat-sen University School of International Education Guangxi University of Finance and Economics

Unlike previous studies in which a single index was used to measure audit quality, this study establishes a new comprehensive index to measure audit quality via Discretionary Accrual, as estimated by Jones' basic model(1991) and Audit Opinions. The former is used to measure the quality of financial statements, and the latter is used to measure the auditors' independence in the mainstream international literature. We examine whether and how an auditor's gender affects the quality of his or her audits under the framework of empathy theory and gender role socialization theory. Using a large sample of 9861 auditor-firm-year observations from Chinese A-share–listed companies from 2011 to 2015, we find that the audit quality of signed auditors shows significant gender differences: these significant gender differences differ from the findings of previous studies that female auditors could provide a higherquality audit than male auditors; that is, in our study the audit quality of the male auditors exceeds that of the female auditors. After distinguishing the positive and negative directions of the Discretionary Accrual, we find no significant gender differences in audit quality between male and female auditors when the earnings had been adjusted upward by the client; that is, female and male auditors had the same audit risk perception. However, when the client adjusted earnings downward, which indicates a lower audit risk for theauditor, the audit quality of female auditors was significantly lower than that of the male auditors. After controlling for the age and position of the auditors,we also find that the gender differences in the auditors' audit quality decreased significantly or even disappeared when the auditor's age exceeded 45 years and/or their position was manager or above. These results are consistent with the empathy theory and gender role socialization theory.

关键词： Auditor characteristics Sex difference Gender difference Audit quality Personal characteristics

Existence and Uniqueness of Weak Solutions for Quasilinear Parabolic Systems

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Journal of Mathematical Research with Applications 1993年第4期 537-538页

作者： yang shixin(Dept.Math Xiamen Univ,Xiamen)

Consider the following IBVP for quasilinear parabolic systemsWhereΩis a bounded domain in Rwith a sufficiently smooth boundary（?）Ω,u=

关键词： QT Existence and Uniqueness of Weak Solutions for Quasilinear Parabolic Systems

2-甲基-5(4)-硝基咪唑酸碱两性解离常数的测定

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华西医科大学学报 1999年第3期30卷 345-346页

作者：杨世昕华西医科大学药学院物理化学教研室成都610041

采用等摩尔分光光度法测定了２甲基５（４）硝基咪唑（２ｍｅｔｈｙｌ５（４）ｎｉｔｒｏｉｍｉｎｄａｚｏｌｅ）的酸碱两性解离常数，结果测得该品的ｐＫｂ＝１２．９８±０．０２，ｐＫａ＝９．６４±０．０４。

关键词：甲基硝基咪唑酸碱两性解离甲硝唑合成

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甲硝唑解离常数的测定

华西药学杂志 1999年第1期14卷 9-10页

作者：杨世昕华西医科大学药学院

酸碱解离常数是联系溶解度与ｐＨ值之间的重要理化常数。ＴｈｅＭｅｒｃｋＩｎｄｅｘ１１ｔｈＥｄ．（１９８９）未收载有甲硝唑的该数据。用等摩尔分光光度法测定甲硝唑原料药物在ｐＨ缓冲溶液中的碱性解离常数，由公式ｐＫｂ＝ｐＫω... 详细信息

酸碱解离常数是联系溶解度与ｐＨ值之间的重要理化常数。ＴｈｅＭｅｒｃｋＩｎｄｅｘ１１ｔｈＥｄ．（１９８９）未收载有甲硝唑的该数据。用等摩尔分光光度法测定甲硝唑原料药物在ｐＨ缓冲溶液中的碱性解离常数，由公式ｐＫｂ＝ｐＫω－ｐＨ＋ｌｇ（Ａｉ－ＡＢＨ＋）／（ＡＢ－Ａｉ）计算得到ｐＫｂ为１１．４７。

关键词：甲硝唑广义酸碱解离常数 UV-分光光度法

The role of brevican regulation in the antidepressant effects of electroacupuncture in a chronic stress rat model

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Journal of Traditional Chinese Medical Sciences 2024年第4期11卷 513-521页

作者： Cong Gai Zhenyu Guo Kai Guo shixin yang Yi Zhang Huimin Zhu Feifei Kan Hongmei Sun Die Hu School of Traditional Chinese Medicine Beijing University of Chinese MedicineBeijing102488China

Objective:To investigate the mechanism of electroacupuncture(EA)for treating depression and to explore the role of brevican in the medial prefrontal cortex(mPFC)in modulating stress susceptibility and the antidepressant effects of EA in ***:Twenty-four SpragueeDawley(SD)rats were equally divided into three groups:green fluo-rescent protein(GFP)+control,GFP+chronic unpredicted mild stress(CUMS),and short-hairpin RNA targeting on brevican(shBcan)+*** 24 SD rats were equally divided into CUMS+GFP,CUMS+GFP+EA,and CUMS+shBcan+EA *** tests were conducted to assess depression-like *** blot analysis was used to evaluate the expression of brevican,aggrecan,GLuA1,and PSD95 in mPFC ***:Behavioral parameter evaluation show that rats in the shBcan+CUMS group exhibited a significantly reduced sucrose preference(P=0.0002)and increased immobility time(P=0.0011)compared to those in rats in the GFP+CUMS *** blotting showed that brevican expression was significantly downregulated in the PrL of the shBcan+CUMS group compared with that in the GFP+CUMS group(P=0.0192).Furthermore,compared to the CUMS+GFP+EA group,the CUMS+shBcan+EA group exhibited a significantly decreased sucrose preference(P=0.0334),increased immobility time(P=0.0465),and increased latency to food(P=0.0261).In the CUMS+shBcan+EA group,the EA-induced brevican and PSD95 overexpression was reversed,compared with that in the CUMS+GFP+EA group(P=0.0454 and P=0.0198,respectively).Conclusion:EA exerts its antidepressant effects through the modulation of brevican expression in *** findings highlight the important role for brevican in stress susceptibility,which could be a potential target for treating depression.

关键词： Depression Electroacupuncture Brevican Perineuronal nets Plasticity

具单项反应的电泳模型定常问题解的存在唯一性

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厦门大学学报（自然科学版） 1997年第1期36卷 17-21页

作者： yang shixin (Dept.of Math.,Xiamen Univ., Xiamen 361005) 厦门大学数学系

应用上下解方法及单调迭代技巧证明了具单项反应的电泳模型定常问题解的存在唯一性．

关键词：电泳模型定常问题唯一性解偏微分方程

Performance comparison of several optimization algorithms in matched field inversion

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声学技术 2004年第S1期23卷 23-28页

作者： ZOU shixin, yang Kun-de, MA Yuanliang (Northwestern Polytechnic University, Xi’an 710072, China) Northwestern Polytechnic University Xi'an 710072 China

Optimization efficiencies and mechanisms of simulated annealing, genetic algorithm, differential evolution and downhill simplex differential evolution are compared and analyzed. Simulated annealing and genetic algorithm use a directed random process to search the parameter space for an optimal solution. They include the ability to avoid local minima, but as no gradient information is used, searches may be relatively inefficient. Differential evolution uses information from a distance and azimuth between individuals of a population to search the parameter space, the initial search is effective, but the search speed decreases quickly because differential information between the individuals of population vanishes. Local downhill simplex and global differential evolution methods are developed separately, and combined to produce a hybrid downhill simplex differential evolution algorithm. The hybrid algorithm is sensitive to gradients of the object function and search of the parameter space is effective. These algorithms are applied to the matched field inversion with synthetic data. Optimal values of the parameters, the final values of object function and inversion time is presented and compared.

关键词： simulated annealing genetic algorithm differential evolution matched field inversion

带梯度项的发展P-Laplace方程解的耗竭

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厦门大学学报（自然科学版） 1999年第6期38卷 811-815页

作者：杨世广钦厦门大学数学系厦门361005

考察带梯度项的发展p-Laplace方程的第一初边值问题　ut - div(｜u｜p- 2u) = - λ｜u｜α- 1u + ｜u｜β, x ∈Ω,t> 0,u = 0, x ∈Ω,t> 0,u(x,0) = u0(x), x ∈Ω,其中p > 2,λ,α和β为正常数,u0(x) ∈L∞(Ω) ∩W1,p0 (Ω)... 详细信息

考察带梯度项的发展p-Laplace方程的第一初边值问题　ut - div(｜u｜p- 2u) = - λ｜u｜α- 1u + ｜u｜β, x ∈Ω,t> 0,u = 0, x ∈Ω,t> 0,u(x,0) = u0(x), x ∈Ω,其中p > 2,λ,α和β为正常数,u0(x) ∈L∞(Ω) ∩W1,p0 (Ω).　　众所周知,若方程不带梯度项,上述问题的解当且仅当0 < α< 1 时在有限时间内耗竭.本文的目的是研究方程右边正的梯度项是否会影响解的耗竭性.应用能量方法,我们给出了解在有限时间内耗竭的充分条件.

关键词： p-Laplace方程梯度项耗竭解初边值问题