查询词典 structure formula

The characteristic, difference and relation of the normal and inverse design are compared detailedly. The formula of the first and second class eigen sensitivity are given. For the horizotal vibration system of building structure, the sensitivity method and perturbation method are adopted to modify the dynamic characteristics. The inverse eigenvalue problem of Jacobi matrix and the positive, symmetry, band matrix are studied. The method of Evolutionany Computation is first used in the inverse design of building structure, the principal problems are studied. The features of aseismatic inverse design of building are analysed.

本文较详细地比较了正、逆设计的特点；给出了特征值和特征向量的一阶和二阶灵敏度分析公式；对于建筑结构水平振动系统，提出了结构动态特征的修改方法；对Jacobi矩阵及实对称带状矩阵的逆特征值问题进行了分析研究，首次将其引入建筑结构抗震逆设计中；首次将进化计算方法应用于建筑结构抗震逆设计中，对主要问题作了探讨；对建筑结构抗震逆设计的特点进行了分析，提出未来的发展方向和前景。

On the foundation of the reasonable fixed position, according to process the process in of be subjected to the dint appearance and clip the tight dint to arrange the principle, drawing up to clip the tight dint to arrange the project reasonablely;Passing the related calculation formula, cliping the tight dint size to carry on estimate towards process in the process, choosing the size structure to clip the tight motive component reasonablely, according to an oneself of work structure and processed requests and process to be characteristics by the dint in the process, choosing the design to clip the tight organization to guarantee by attain that the work piece positions accurate reasonablely, fast .

在合理定位的基础上，根据加工过程中的受力状态和夹紧力的布置原则，来制定夹紧力合理的布置方案；通过相关计算公式，对加工过程中夹紧力大小进行估算，来选择尺寸结构合理的夹紧动力元件，根据工件自身结构和加工的要求以及加工过程中受力的特点，来选择设计合理的夹紧机构以达到保证工件的定位的准确，快速。

At the same time, the cooperation of the multi-layer frame structure is researched with FEA when the pre-stressed threads are stretching, and the relationship between the beam of stretching layer and the beams of nearly layers is discussed. The layout effect of regular reinforcement in the beam on the pre-stressed effective quantities is also analyzed, and the elementary estimation formula of pre-stressing loss on the multi-layer frame is also deduced according to the pre-stressing loss of one-layer pre-stressed frame structure.

同时文中还运用有限元对多层框架结构在预应力张拉过程中，某层梁预应力的张拉与相邻层梁的影响关系和结构各构件的整体协同工作做了研究，分析了非预应力筋在梁中的配置对框架梁预应力有效量的影响；并且在一层框架梁侧限预应力损失的基础上，扩展了多层框架结构中侧向约束引起梁的预应力损失值的初步设计估算公式。

Based on wave analysis method, the characteristics of vibration wave propagation in typical hull structure were analyzed in consideration of wave type conversion and impedance variation in non-homogeneous structure, and the formula of sound transmission loss during incidence of plane bending wave was deduced.

以波动理论为基础，根据不均质结构中波型转换、阻抗特性，系统地分析了典型船舶结构中振动波的传递特性，推导并给出了平面弯曲波入射时的隔声量公式。

This article expatiated on the structure and principle of coreless transformer in printed circuit board, introduced and analysed the Hurly_duffy's method to calculate the self and mutual inductance of coreless transformer in printed circuit board in which I found the fault, re-modified the current unit model, deduced a new formula used commonly, and offered testing process and circuit as well as mended the structure of coreless transformer which made the analysis easy.

本文阐述了无芯印制板变压器的基本结构和原理，介绍和分析了Hurly-duffy 的无芯印制板变压器自感和互感的计算方法，指出了它的不足，在纽曼公式的基础上，重新修正了电流元模型，将线圈看作是粗线圈，推导出普遍适用的计算公式，并给出了测试方法和测试电路。

As a kind of high-rise structure , tower building is sensitive to wind load; TMD can increase the security and reliability of structure observably with simple mechanism; in power spectrum analysis matrix formula, coefficient matrix can be extended for MTMD optimize analysis, complementarity with time domain method.

标志塔属典型高耸结构，对风荷载作用敏感；TMD机械构造简单，可以显著提高结构安全性和可靠性；谱分析矩阵表达中，将系数矩阵、增广矩阵进一步扩充，可同时进行多TMD参数优化，效率较高，与时程分析互为补充验证。

According to engineering practical requirement,by adopting structural frequency sensitivity formula,a scheme dealing with a parameter calculation model for a structure and its structural optimal model is proposed in this paper,and a three-dimensional structure s frequency topologhy optimal method is developed.

根据工程实际要求，利用频率灵敏度公式，提出了结构特性参数计算模型与三维结构优化模型的处理方案，研究了三维结构的频率拓扑优化设计方法和算法。

Taking into account Reliability and strength and stress scatter, the paper introduces calculate formula of structure safety factor by design theory of reliability and putting forward a definition to structure safety factor.

根据可靠性设计思想，考虑结构的可靠性、强度及应力的分散性，给出安全系数的定义，推导出安全系数的理论计算公式，为合理选择安全系数提供参考。

According to the general principle of material mechanics and section form of heavy steel structure,derives the calculation formula of polar moment of inertia J_ρ of heavy steel structure on torsion.

根据材料力学的基本原理，针对重型结构钢截面的形式，推导出其扭转时极惯性矩Jρ的计算公式

Then the structure unit of hexangular lattice is found according to the principle of invariable symmetry. Renormalization transformation is processed when we regard the structure unit and the growth model as graphs before and after transformation respectively. After choosing the11thermodynamic function fugacity as parameter, we can write out the partition functions before and after transformation and the formula of renormalization transformation. At the same time, we also work out the fixed points of transformation.

然后根据对称性不变的原则，从整体晶格中选取结构单元，把结构单元和生长模型分别作为重整化变换前、后的图形来进行重整化变换，选取热力学函数易逸度为参量，写出了重整化变换前后的配分函数和重整化变换关系式，求出了这一变换的不动点。

Must have Coordination and negotiation skill, flexible ideas, and be punctilious person.

必须具备较好的协调与谈判能力，头脑灵活，工作认真仔细

Result: 18 patients are all with simple eye.The pigment mole lies in nasal and temple sides of the ball conjunctiva,in which 2 lie in lacrimal caruncle and semilunar plica.

结果：18例患者均为单眼，色素痣大多数位于内外侧睑裂部球结膜面，2例位于泪阜及半月皱襞，经激光治疗后，10例色素痣消失，有5例行再次激光后消失，2例行第三次激光后消失，1例第四次激光后消失。