Numerical Experiments and Structural Transformation of NonLinear Evolution in Illposed Systems

Numerical experiments on nonlinear equations of the 1st and 3rdorder derivatives have been carried out through structural analyses in the phase space according to the numerical instability of illposed systems, with changes of initial values and parameters, etc.. The results show that the quantitative instability in an illposed system may reveal reversed transformation in system evolution by structural representation, and confirm A·Dauglas’ theorem that “a nonlinear equation does not satisfy the existence of the initial value in a linear wellposed system”.     

强化师范院校非师范专业校外实践基地建设之对策

在校内实验室建设投入不足、实训设施缺乏的情况下,师范院校非师范专业学生的实践能力必须通过校企合作共建实践基地,借助于校外相关企业的场地和设施来实现。在现有体制下,校外实践基地建设过程中存在企业积极性不高,学校与企业之间存在“两张皮”的情况。必须在科学制定实践性教学环节的基础上,加强对校外实践基地的管理,鼓励年轻老师到企业挂职,发挥校友的作用,从制度上保证实现学校、企业、学生三赢。     

非双倍测度下多线性Calderón-Zygmund算子及其交换子在Herz型空间上的有界性

本文引入非齐型空间上的Herz空间,并证明了多线性Calderon-Zygmund算子及其交换子在这些空间上的有界性.     

90后非主流网名的语言学和心理学探析

90后非主流网名的命名，是基于语言的表达。这些非主流网名作为一种文化载体，不仅是语言学的重要研究课题，还透露出90后潜在的心理状态，折射出社会环境对其价值定位、审美取向的巨大影响。     

静力与动力弹塑性分析在超限高层建筑结构抗震设计中的应用

随着我国经济的发展，超限高层建筑越来越多，如何评估和保证其在地震作用下的可靠性，是众多结构抗震工作者研究的课题。本文针对某超限高层办公楼采用静力弹塑性和动力弹塑性分析方法进行了研究分析。结果表明：对于超高层结构，由于高阶振型的影响显著，push—over方法中荷载的加载方式等需进一步研究，以使其分析结果满足设计要求。动力弹塑性分析方法即弹塑性时程分析方法，由结构初始状态逐步积分直至地震作用结束，能够计算结构构件在每个地震波记录时刻的地震反应。尽管这种分析的工作量是相当大的，但随着计算机技术的发展，弹塑性时程分析方法有广泛的应用前景。本文在目前研究成果的基础上，对某超限高层进行了分析，得到了满意的结果，对指导设计起到积极的作用。     

组合运输的优化调度

对多车场情况的非满载的小货运量运输问题进行了分析 ,提出采用组合运输方式可以提高车辆的使用效率 ,进而构造了由分组和连接构成的序列优化启发式算法 ,并用实例进行了验证.     

名词化结构体现的作格性——以英汉语为例

名词化体现的作格特征可视为动作过程"非时间化效应"之自然结果.语义上的"施-动-受"及其相应语法结构"主-谓-宾"是以能量的作用模式为基础而采取的一种事件表达方式,但名词化结构因非时间化效应而使这种能量的典型传递方式不适合于表达事物化的过程,转而采取作格模式.     

具有非倍测度的参数型Marcinkiewicz积分交换子估计

本文证明了由参数型Marcinkiewicz积分Mρ和Lipshitz函数b生成的交换子Mρb的有界性.在M的核函数满足较强的Hrmander条件下,证明了Mρb不仅从Morrey空间Mpq(μ)到RBMO(μ)有界,从Lebesgue空间Ln/β(μ)到空间RBMO(μ)有界,而且从Morrey空间Mpq(μ)到Lipschitz空间Lip(β-np)(μ)有界,这里p=n/β.     

菏泽学院物理系提升非师范毕业生就业竞争力的探索

从适应社会需求出发，菏泽学院物理系注重培养非师范生动手操作、创新和人际交往能力，以提高其就业竞争力．主要途径如下：成立科技创新实验室；组织学生参加暑期三下乡和电子技术竞技比赛活动；开辟校企合作基地等．上述探索和实践取得了显著成效，非师范毕业生就业状况良好．     

New and little‐known species of Didemnidae (Ascidiacea,Tunicata) from Australia (Part 3)

The majority of the 58 species discussed, including 10 new species, were collected by scuba divers at 5–10?m in waters around Australia. Species are from Leptoclinides (11), Polysyncraton (11), Didemnum (19), Trididemnum (7), Lissoclinum (8), Clitella (1), and Diplosoma (1), and new species are in all except Trididemnum and Diplosoma. Additional characters (including a pyloric vesicle reported previously in the Holozoidae and several unrelated didemnid taxa) have been detected for the monotypic genus Clitella Kott, , which is recorded for only the second time. A review of known Australian ascidian species confirms the Didemnidae as the most speciose ascidian family in these waters. In this family, there appears not to be appreciable gene flow between tropical and temperate waters and few species have a continuous tropical–temperate range. A preponderance of Western Pacific non‐indigenous species is in the north, while indigenous species, some probably isolated from related tropical ones, are dominant in the temperate waters of the southern half of the continent. Although intraspecific variation and convergence obscures species differences, some aspects of the living organisms detected in in situ photographs contribute to identification. Keys to Australian didemnid species described since the publication of the Australian Ascidiacea part 4, Didemnidae (Kott ) are included.