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清政府因应留日学生杂志策略探析——以《湖北学生界》为例

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近代史学刊 2024年第1期 39-59,290页

作者：吴世平复旦大学历史学系

《湖北学生界》作为由湖北官费留日学生主办的刊物,其创刊之初言论较为温和。湖广总督张之洞和湖北巡抚端方通过他们在日本经营的情报网络,早在该杂志筹备出版之际便已有所觉察。是时,张之洞主张查禁,而端方以并无“违谬字样”为由建议... 详细信息

《湖北学生界》作为由湖北官费留日学生主办的刊物,其创刊之初言论较为温和。湖广总督张之洞和湖北巡抚端方通过他们在日本经营的情报网络,早在该杂志筹备出版之际便已有所觉察。是时,张之洞主张查禁,而端方以并无“违谬字样”为由建议采取监管策略。随后,因拒俄风潮爆发,《湖北学生界》的论调渐趋激进,出现响应拒俄运动、主张“军国民主义”、批评清政府施政、宣传革命“排满”的倾向。与此同时,舆论界传出端方暗中支持《湖北学生界》的风说,致使端方无比紧张,极力撇清关系,迅速与张之洞在查禁一事上达成共识,随之,清政府经由收买主笔王璟芳干扰其发行,同时通过约束官费留学生、威胁内地“名誉会员”,致使其停摆。

关键词：《湖北学生界》张之洞端方留日学生

海关监管视角下促进再制造产业高质量发展的法律对策研究

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海关与经贸研究 2024年第1期45卷 62-70页

作者：吴世平对外经济贸易大学湛江海关口岸监管处

党的二十大报告指出,坚持高水平对外开放,加快构建以国内大循环为主体、国内国际双循环相互促进的新发展格局。我国再制造产业经过十多年的探索发展,从方兴未艾到面临质疑,如何兴利除弊,关乎国际国内资源利用、地方经济发展规划、企业... 详细信息

党的二十大报告指出,坚持高水平对外开放,加快构建以国内大循环为主体、国内国际双循环相互促进的新发展格局。我国再制造产业经过十多年的探索发展,从方兴未艾到面临质疑,如何兴利除弊,关乎国际国内资源利用、地方经济发展规划、企业生产经营,受到社会各界高度关注。本文梳理国家对再制造产业治理的发展脉络,分析当前再制造产业入境料件海关监管中值得商榷的问题,并从法律法规、治理模式、行业标准等方面提出新形势下促进再制造产业高质量发展的建议。

关键词：再制造产业海关监管高质量发展制度型开放

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侵染贵州番茄的辣椒褪绿病毒分子鉴定与分析

病毒学报 2024年第2期40卷 402-411页

作者：田雨李淳吴石平黄露安星宇王莉爽贵州大学生命科学学院/农业生物工程研究员院山地植物资源保护与种质创新教育部重点实验室贵阳550025 贵州省农业科学院植物保护研究所贵阳550006

辣椒褪绿病毒(Capiscum chlorosis virus, CaCV)是正番茄斑萎病毒属(Orthotospovirus)的重要成员,能够侵染辣椒、番茄等作物并造成严重危害。为明确贵州番茄CaCV分离物基因组分子结构特征及其进化起源,本研究通过RT-PCR技术扩增和测定了... 详细信息

辣椒褪绿病毒(Capiscum chlorosis virus, CaCV)是正番茄斑萎病毒属(Orthotospovirus)的重要成员,能够侵染辣椒、番茄等作物并造成严重危害。为明确贵州番茄CaCV分离物基因组分子结构特征及其进化起源,本研究通过RT-PCR技术扩增和测定了CaCV的N、NSs和NSm基因的全长片段,分别获得长度约828bp、1 320bp和927bp的目标条带。经过序列比对和进化树构建等方法进行遗传进化分析发现,贵州番茄CaCV分离物的N、NSs和NSm基因与CaCV其他分离物核苷酸的相似性分别在85.5%~99.4%、82.7%~98.9%和83.1%~98.7%之间。根据系统发育树结果,贵州番茄CaCV分离物N基因和NSs基因与中国云南分离物的亲缘关系较近,NSm基因与中国海南和广州分离物的亲缘关系近,推测贵州CaCV可能是由于番茄、辣椒的品种引进,及蓟马带毒传播进入。这是贵州省CaCV侵染番茄的首次报道,对监测CaCV在我国的扩散具有重要意义。

关键词：番茄辣椒褪绿病毒病毒鉴定序列分析

猕猴桃溃疡病病原菌MLVA分型引物的筛选及验证

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果树学报 2024年第6期41卷 1188-1198页

作者：姚令王海黄露安星宇陈文王莉爽薛原吴石平贵州省农业科学院植物保护研究所·农业农村部喀斯特山区作物基因资源与种质创新重点实验室贵阳550006 贵州省农业科学院农业科技信息研究所贵阳550006 贵州省烟草公司安顺市公司贵州安顺561000

【目的】筛选出一组可精准快速地对丁香假单胞菌猕猴桃致病变种(Pseudomonas syringae ***,Psa)进行分型的引物组合。【方法】针对前期文献已报道的34对引物,采用PCR技术验证该34对引物对中国Psa菌株的扩增效率及准确性;利用模拟PCR获... 详细信息

【目的】筛选出一组可精准快速地对丁香假单胞菌猕猴桃致病变种(Pseudomonas syringae ***,Psa)进行分型的引物组合。【方法】针对前期文献已报道的34对引物,采用PCR技术验证该34对引物对中国Psa菌株的扩增效率及准确性;利用模拟PCR获取菌株串联重复(TR)数;以辛普森指数(Simpson’s index,SI)作为筛选引物组合的标准,基于R软件平台,筛选最优引物组合。【结果】34对引物对中国Psa扩增效果均良好,其中TR14与TR11II、TR19与Psa-01引物序列相同;TR8与Psa-08、TR39II与Psa-10、GM-1834与TR10I、GM-1553与TR64II、TR19Psa-01与TR19II扩增同一TR;Psa-09扩增产物串联重复单元长度不唯一,TR2II扩增产物侧翼变异较大,不能通过电泳确定串联重复数;最终确定SI值与全部引物组合相同的最低引物数量为9对,使用该9对引物的组合可将Psa已知的5种生物型准确分开。【结论】TR23/Psa-04、Psa-03、Psa-05、Psa-06、TR10IGM-1834、TR30I、TR1II、Psa-10TR39II、TR64IIGM-1553等9对引物可代表当前文献报道的34对引物,进行Psa分型研究,探索猕猴桃溃疡病的传播和流行规律,为病害防控策略的制定提供科学依据。

关键词：丁香假单胞菌猕猴桃致病变种多位点串联重复序列分析群体遗传结构引物筛选

Numerical Simulation of Bubble Migration in Liquid Titanium Alloy Melt During Vertical Centrifugal Casting Process

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Journal of Harbin Institute of Technology(New Series) 2019年第6期26卷 91-96页

作者： Qin Xu Xing Wang shiping wu School of Mechanic and Electrical Engineering Henan University of TechnologyZhengzhou 450001China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

The bubble migration in liquid titanium alloy melt during vertical centrifugal casting process has been predicted. The effects of different parameters, such as the initial bubble location, the mold rotational speed and the mold rotational direction on the bubble in the migration process are investigated. The results show that the bubble migration can be divided into the radial movement to the mould rotation axis and the circular movement to the mould wall opposite to rotational direction of the casting mould. The casting mould wall has an impeditive effect on the circular movement of the bubble during its migration process. And the bubble finally migrates like a straight line along the mould wall located at the opposite direction of the rotational casting mould whether it rotates clockwise or anti-clockwise. The bubbles at the position near the mould wall located at the opposite direction of the rotational casting mould are much easier to migrate in a straight line. The instantaneous speed of the gas bubble increases with the increment of the mould rotational speed. However the mould rotational speed is high or low, the moving speed of the gas bubble increases slightly at the primary stage, and then decreases gradually like a ladder.

关键词： titanium alloy vertical centrifugal casting gas bubble migration numerical simulation

BANDED M-MATRIX SPLITTING PRECONDITIONER FOR RIESZ SPACE FRACTIONAL REACTION-DISPERSION EQUATION

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Journal of Computational Mathematics 2024年第2期42卷 372-389页

作者： shiping Tang Aili Yang Yujiang wu School of Mathematics and Statistics Lanzhou UniversityLanzhou 730000China School of Mathematics and Statistics Hainan Normal UniversityHaikou 570000China

Based on the Crank-Nicolson and the weighted and shifted Grunwald operators,we present an implicit difference scheme for the Riesz space fractional reaction-dispersion equations and also analyze the stability and the convergence of this implicit difference ***,after estimating the condition number of the coefficient matrix of the discretized scheme,we find that this coefficient matrix is ill-conditioned when the spatial mesh-size is sufficiently *** overcome this deficiency,we further develop an effective banded M-matrix splitting preconditioner for the coefficient *** properties of this preconditioner together with its preconditioning effect are ***,Numerical examples are employed to test the robustness and the effectiveness of the proposed preconditioner.

关键词： Riesz space fractional equations Toeplitz matrix conjugate gradient method Incomplete Cholesky decomposition Banded M-matrix splitting

2-D boundary-fitted coordinate grid generation for casting with complex shape

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China Foundry 2013年第3期10卷 167-171页

作者： Wang Ye wu shiping Xue Xiang Guo Jingjie Kang Huijun School of Materials Science and Engineering Harbin Institute of Technology

In order to overcome the zigzag grids generated by conventional finite difference method on complicated casting boundaries in the simulation of casting process, the generation program for 2-D boundary-fitted coordinate grid has been developed by solving a set of partial differential equations (PDE) numerically. The STL format files were treated as input data for 2-D physical regions. The equipartition method for boundary points was used to improve the self-adaptability of grid according to the characteristic of the STL format files. The program was demonstrated through some examples. The comparison between the conventional finite difference method and the proposed method shows that this program is effective and flexible for generation of boundary-fitted grid in any arbitrary 2-D complex domain, and the grid is in accordance with the variety of boundary curvature finely. The program also provides two types of boundary-fitted grids for double-connected region, O-type and C-type. The limitation of the step-like boundary with the rectangle grid could be avoided effectively. Therefore, the computational accuracy and efficiency would be improved and the computational time would be saved significantly by the application of boundary-fitted grids.

关键词： complicated casting boundary-fitted grid STL 2-D region self-adaptability

The nonlocal solution of two parallel cracks in functionally graded materials subjected to harmonic anti-plane shear waves

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Acta Mechanica Sinica 2007年第4期23卷 427-435页

作者： Jun Liang shiping wu Shanyi Du Center for Composite Materials and Structure,Harbin Institute of Technology,Harbin 150001,China Center for Composite Materials and Structure Harbin Institute of Technology

In this paper, the dynamic interaction of two parallel cracks in functionally graded materials （FGMs） is investigated by means of the non-local theory. To make the analysis tractable, the shear modulus and the material density are assumed to vary exponentially with the coordinate vertical to the crack. To reduce mathematical difficulties, a one-dimensional non-local kernel is used instead of a twodimensional one for the dynamic problem to obtain stress fields near the crack tips. By use of the Fourier transform, the problem can be solved with the help of two pairs of dual integral equations, in which the unknown variables are the jumps of displacements across the crack surfaces. To solve the dual integral equations, the jumps of displacements across the crack surfaces are expanded in a series of Jacobi polynomials. Unlike the classical elasticity solutions, it is found that no stress singularity is present at the crack tips. The non-local elastic solutions yield a finite hoop stress at the crack tips. The present result provides theoretical references helpful for evaluating relevant strength and preventing material failure of FGMs with initial cracks. The magnitude of the finite stress field depends on relevant parameters, such as the crack length, the distance between two parallel cracks, the parameter describing the FGMs, the frequency of the incident waves and the lattice parameter of materials.

关键词： Crack The non-local theory Stress waves Functionally graded materials

Study on traveling magnetic field casting of sheet components

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China Foundry 2010年第3期7卷 259-264页

作者： Su Yanqing Xu Yanjin Zhao Lei Zhang Tiejun wu shiping Guo Jingjie School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

The distribution of a magnetic field over an inductor used for sheet castings has been investigated *** an increase in height from the surface, the magnetic field density decreases according to the exponential *** the transverse direction, the magnetic field density is approximately uniform except near the *** magnetic field density is direct proportional to the number of turns multiplied by the current in ***-magnetic material in the upper mould can enhance the magnetic field *** the electromagnetic force, the mould-filling process of sheet casings has been studied by physical simulation *** difference in filling capability between gravity casting and travelling magnetic field casting has been *** electromagnetic force can enhance the filling process, but it also brings a *** an increase in the magnetic field density, the surface quality of the aluminum alloy sheet castings becomes *** reason is discussed.

关键词： traveling magnetic field casting magnetic field density mould filling process sheet castings