上梁

Based on the method of multi-objective fuzzy optimization and the overhead traveling crane design, a mathematical model of fuzzy optimization for main box beam section is established. A fuzzy goal anthology is constructed. The fuzziness of multi-objective function and constraints is defined. The transformation of the fuzzy constraints set to normal constraints set in real number domain is realized by applying optimal level cut set method. The optimal solution and optimal constraint value of sub-objective function in the feasible field are found using the genetic algorithms.

应用多目标模糊优化方法，以工程设计中桥式起重机箱形主梁设计为实例，建立了桥式起重机箱形主梁多目标模糊优化设计的数学模型，构造了模糊目标集，确定了多目标函数的模糊性和约束的模糊性，并应用最优水平截集法实现了模糊约束到实数论域上的集合转换，从而用遗传算法寻求到子目标函数在可行域空间的最优解和约束最优值。

Two hysteretic models suitable for damaged and undamaged fiber-reinforced prestressed wide-beam frames were proposed sequentially. The hysteretic models consisted of a skeleton curves which based on the concept of three stage polygonal line with soften region and some hysteretic rules.

在上述研究的基础上，分析了无损伤和地震损伤的钢纤维预应力扁梁框架滞回曲线的主要特征，进而分别提出了适合于无损伤和地震损伤的钢纤维无粘结预应力扁梁框架结构的恢复力模型。

In order to study the mechanical behavior of special joint at connection between stiff suspension cable and upper chord of truss beam for stiff suspension reinforced steel truss bridge, a 1:2 scale-down model test and three-dimensional finite element analysis of Dongjiang Bridge's special joint S25 were investigated in order to find the stresses distribution rule and mechanical property of the special joint.

为研究刚性悬索加劲钢桁梁桥刚性悬索与桁梁上弦杆的连接处特殊节点的力学行为，结合东莞市东江大桥，采用1：2的几何缩尺比例，对其特殊节点S25进行了模型试验研究，并进行了详细的空间有限元分析。

Test and analytical studies indicated that (1) connection moment strengths in positive bending were similar but in negative bending were different on the order of 0.72 and 0.6 percent compared to the bare steel beam subassembly so that the self-centering behavior of the subassemblies with the composite concrete slab was not observed,(2) force-transferring mechanism in the connection proposed was able to predict the force-deformation relationship of the subassembly with the composite concrete slab, and (3) a general-purpose nonlinear finite element analysis program ABAQUS was used to perform the correlation study on the subassemblies with and without composite concrete slab.

实验结果显示(1)含楼版试体在千斤顶往正方向作用时的弯矩与未架设楼版试体接近，但在千斤顶往负方向作用时未架设楼版试体的弯矩分别约为含楼版试体的0.72%及0.6%，所以预力梁柱接合系统於钢梁上架设楼版，对预力系统自行复位的能力造成很大的影响、(2)由预力梁柱接合系统力量与位移间的关系利用迭代方法可以预测含楼版试体的行为、及(3)以有限元素分析程式模拟其中一组含非传统楼版试体以探讨含楼版预力接合系统在挠曲载重作用下的行为。

The paper fristly analyzed the reason of mine air reversing in Liangbei coal mine of Xinlong Coal Industry Corporation,which based on mensuration of mine ventilation resistance and spontaneousness wind pressure,and then the measures of preventing the air reversing was put forward.

在对新龙矿业集团公司梁北煤矿的矿井通风阻力测定和自然风压测量的基础上，找出梁北煤矿2007年1月气温突降后所引起的主井风流反向的主要原因，推导出导致风流反向的基本条件，提出在副井至-550 m运输石门之间增加调节设施以增大副井的风阻、增大主要通风机机械风压、在主井下安装压风机人为增大主井的机械风压、减少主井附近热源、对主井的风流进行降温处理和对副井的进风流进行预热以减少主副井之间的风流平均密度差等防止风流反向的控制措施，从而使主井恢复正常的进风状态，消除了矿井安全生产的严重隐患

The use of the new flank could lead to great reduction to the consumption of material of main grider and the stiffener on it.As well as the weight of the grider and the cost .

运用这种翼板，可以大大减少主梁的材料和其上的加强筋，从而使龙门起重机的主梁得以大大减轻，降低制造成本。

Detailed researches are implemented to behavior of superincumbent strata in mining 45 degree coal seams using horizontal section top-coal caving in this paper.

本文针对45°特厚煤层水平分段放顶煤开采后的上覆岩层移动破坏规律进行了深入研究，指出45°特厚煤层开采后老顶破断后在一定层位形成了沿倾斜方向的铰接岩梁结构，即倾斜岩梁。

As for the three-story frame, the beams provide the restriction when the column lost their stability. So the overall sustention ability of the beam could be distributed to the border columns. The overall critical load of the three-story frame could be extracted by solving the equation with two variables.

对于三层斜腿框架的整体稳定性研究，本文考虑梁在框架中的作用对柱而言就是在失稳时对柱提供约束，根据层与层互相支援的思路，以梁在上下层分配的约束为未知量，通过求解二元方程，得到三层斜腿钢框架整体失稳的临界荷载。

This paper describes a demarcation and decoupling technology of helicopter bearingless tail rotor flexible beam,this technology can be used to solve the problem of flapping bending moment and lag bending moment coupling that encountered in bearingless flexible beam fatigue test,it also can be used to separate each test load component on the section effectively and to reduce the test error.

本文介绍了一种直升机无轴承尾桨柔性梁标定与解耦技术，该技术能有效地解决无轴承尾桨柔性梁在试验中挥舞弯矩与摆振弯矩的耦合问题，并能有效分离截面上各分项试验载荷，减少其试验误差。

4The electrical double layer model, joining with the microstructure of CFRC,fractal electrical emission, electrothermal effect, thermoelectrical effect and electrical osmosis are used to analyze the mechanism of mechanoelectric effect and electromechanical effect of CFRC.

采用正交试验方法研究了不同配比分散剂对碳纤维在水泥基体中分散性的影响，得到了较佳分散剂配比，探讨了分散剂的作用机理和碳纤维长度分布规律；（2）研究了碳纤维水泥基复合材料中纤维掺量、水灰比、电极形式、载荷形式等对力电效应的影响，考察了CFRC力电效应的两种表现形式及在机敏混凝土结构上的应用；（3）研究了CFRC立方试块、CFRC梁和不含导电填料梁的电力效应，分析了电流大小、电流方向等与电致变形的关系；（4）根据界面电偶层模型，结合CFRC的微观结构，以及断裂电发射、电热效应、热电效应和电渗效应等分析了CFRC力电、电力效应的机理，阐明碳纤维的作用机制。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。