构形的

A necessary and sufficient condition about the reducibility of central essential hyperplane arrangements is given:a central essential arrangement is irreducible if and only if the matroid is connected.

具体地，本文将对每一个超平面构形，构造一个拟阵，证明中心本质构形不可约的充分必要条件是对应的拟阵是连通的。

This dissertation gives a description of pictophonetic characters system of Xiao Zhuan system with the methodology of systematism. On the basis of the description, we discuss the basic theory on the pictophonetic characters system and the character-formation system of the Chinese characters and advanced some preliminary views on the analytic method of the character-formation system of the Chinese characters and the developmental direction of the modem Chinese characters.

本文采用系统论方法，对小篆字系的形声系统进行了全面的测查和描写，并在此基础上，对形声系统和汉字构形系统的基本理论问题进行了研究，对汉字构形系统的分析方法和现代汉字的发展方向的问题也提出了初步的看法。

Fiber similar spindle-shaped cells, equality configuration, or egg shape slender shape of nuclei, nucleolus well developed.

纤维型细胞类似纺锤状，平等构形，有蛋形或细长形的细胞核，核仁发育良好。

It was concluded that Glomus mosseae inoculation improved the drought resistance of Broussonetia papyrifera Vent, especially in moderate stressed conditions. And the contribution of AM symbiosis to plant to avoid the stress or to increase its tolerance might be the result of modification of root morphology and fractal character.

由此作者认为，接种G.mosseae在不同土壤水分条件下促进了构树幼苗的生物量积累，这种促进作用在土壤干旱条件下尤为明显，表明AM菌根真菌G.mosseae提高了宿主构树的抗旱性；G.mosseae对宿主构树抗旱性的提高与G.mosseae对构树根系形态特征、分形特征的改变密切相关。

NodD binds to and bends target promoters through anchoring two tandem and individual specific DNA sites. NodD functions as a tetramer, which has a V-shaped main body. Tetrameric NodD is to change its own conformation rather than its oligomeric forms in response to small signal molecules. The specific interaction between each NodD DNA-binding domain and each specific DNA site does not alter itself in spite of naringenin induction, and the induced conformational change is transferred from protein to DNA. Only the DNA conformation incited by induced NodD is competent for RNA polymerase to form the transcriptional open complex. It cannot be excluded that NodD may have protein-to-protein contacts with RNA polymerase, and that the NodD conformational change may also directly contribute to the transcriptional open complex formation. However, the NodD conformational change itself cannot serve as the determinant of the transcriptional molecular switch.

通过研究，我们提出了初步的NodD操纵子激活模型：第一，四聚体是NodD蛋白的功能单位，它通过铆钉两个串联的相对独立的DNA靶位点结合被诱导的启动子；第二，小分子配基的结合是改变NodD四聚体的构象而不是引发不同形式的寡聚体，在我们的模型中，NodD四聚体缩小其V形主体的弯折角，进而缩短其DNA结合功能域的间距；第三，小分子信号的诱导并没有改变NodD的DNA结合域和其DNA靶位点的相互作用，NodD的构象改变由蛋白质经其双铆钉位点传递给DNA；第四，只有诱导状态的NodD激发的DNA构象才能有效地使RNA聚合酶形成转录开放复合物；第五，不排除NodD与RNA聚合酶可能有直接的相互接触位点，不排除NodD构象的改变可能直接有利于RNA聚合酶形成转录开放复合物，但是我们认为NodD构象改变本身不是充当转录激活开关的决定因素。

Poetic rhythms of New Metrical Poetry are the regular arrangement of time units of the same sound intervals,which comprise several levels: the most basic rhythmical unit is sound caesura and semantic caesura.

新诗格律节奏构成的最基本节奏单元是音顿和意顿；向外发展形成两种建行方式——音顿连续排列建行和意顿对称排列建行；再向外发展就形成构节构篇的形式化节奏体系和口语化节奏体系，其基本构形原则是&句的均齐和节的匀称&，由此形成新格律诗体丰富的具体格式。

The web perforation can provide space for electrical conduits and bracing. Therefore, it has the meanings and motive for the study of C-shaped section with web openings. The strength of a compression member can be influenced by the section shape, thickness of section, length of member, and support condition.

不过，构材之厚度、加劲与未加劲、是否开孔、上下两端之接合方式，皆会影响受压构材之抗压能力，所以目前先针对C形断面构材的开孔与否及上下两端之接合方式，分别以两种尺寸来讨论，并藉由有限元素分析软体ANSYS 6.0版，来模拟构件受压时，断面的应力分布情形。

Modular self-reconfigurable robots consist of large numbers of identical modules that possess the ability to reconfigure into different shapes such as snake or hexapods as required by the task.

模块化自重组机器人由大量结构、功能都相同的模块组成，它可以根据环境或任务的不同将模块重新组合形成不同的构形，例如蛇形、履带形或昆虫形等，可以很好的满足救火、地震后的城市搜救和战地侦察等不确定性环境中的多任务要求。

Dien = diethylenetriamine: Thecoordination sphere of copper in the complex is distorted square-based pyramidalgeometry with 〓 chromophores.

两种构型的titb配体同时与〓单元配位，在晶格Ⅲ平面形成了一种72元心形环。72元心形环在晶格Ⅲ平面无限扩展，形成由72元心形环稠合而成的平面网状结构。

Using the innovative design method based on mechanism combination, taken four-wheeled, six-wheeled and eight-wheeled space-exploring robot as research object,we have got as many as sventy new kinds of isomorphic combination localmotion platforms and one hundred and sixty five new kinds of isomerous combination locomotion platforms.

以四轮、六轮和八轮空间探测机器人为研究对象，采用基于构形组合的空间探测机器人设计方法，得到70种新型同构组合空间探测机器人移动机构和165种新型异构组合空间探测机器人移动机构。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。