等轴

In the practical power system operation,the powers of generators and loads are changing constantly,and the state variables e.

实际电力系统运行中，发电机和负荷的功率随时都在变化，发电机中各状态变量和代数变量(交轴、直轴的电压和电流等)分布在一定范围内。

In this work, how the axial thermal conductivity of the three kinds of nanotubes is affected by axial length, temperature and tensile strain is investigated, and their thermal conductivities are compared and analized.

研究了轴向长度、温度和外加拉伸应变等因素对三种纳米管的轴向热导率的影响，并对三种纳米管的导热性能进行了比较。

At first in the preliminary design this paper computes the linear damping coefficient of the viscous damper employed in this project using Composite Response Spectra approach, meantime, this paper proves that reducing the exponent of velocity of the piston can increase the magnitude of the dissipative energy, because of the viscous damper employed in the practical project character nonlinear behavior; next this chapter performs analysis and comparison between the building without and with the viscous dampers aforementioned when the building suffers from various Time Domain Response, from the angle of displacement, interstroy drift, velocity, interstory velocity, acceleration, energy, maximum axial force of the dampers and of the column etc., in order to prove that the incorporating the viscous dampers into the buildings has great superiority on enhancing its aseismic performance ; furthermore, this chapter also expatiates on diverse assembly form of the viscous dampers that results in the adverse impact on the internal force of the structural member in this building, on the ground of which this segment bring about the preference of the assembly form of the viscous damper; finally this chapter points out the sphere of application of the analysis and computation using Composite Response Spectra approach in design: it is available in well-proportioned stiffness structures and isn抰 available in the structures that contain weak story. It is recommendable, particularly, to incorporate the fluid viscous dampers into this structure that contain weak story to refrain earthquake and reinforce, such as the Central Hall of Shanghai Exhibition Hall.

首先使用了反应谱分析法设计出欲附设的粘滞阻尼器的线性阻尼系数，由于实际工程所用的粘滞阻尼器具有非线性的特性，故而笔者又证明了降低速度指数对提高粘滞阻尼器的耗能量的优势所在；接着分别从位移、层间位移、速度、层间速度、加速度、能量、最大阻尼出力和柱轴力等不同的角度对结构在附设粘滞阻尼器前后的时程反应进行了分析对比，籍此在实际工程中证明了附设粘滞阻尼器对于提高结构的抗震性能的优越性；再者，笔者还阐述了采用不同的粘滞阻尼器布置方式对结构中构件内力特别是柱轴力和基座竖向反力产生的不利影响，并在此基础上提出了布置方式的优选；最后，指出了反应谱法在设计中的适用范围：对于均匀结构反应谱法能够使用，而对于含有薄弱层的结构反应谱法并不适用；对于类似于上海展览馆中央大厅的含薄弱层的结构尤其值得使用粘滞阻尼器的方法进行抗震加固。

Through analyzing, oil pressure signal, arm vibration signal, motor cutting current signal, torsional moment and torsional vibration signals of drum shaft are collected as the information resources of multi-sensor.

鉴于此通过分析提出，拾取调高油缸压力信号、摇臂振动状态信号、截割电机的电流信号、滚筒轴的扭矩信号、滚筒轴的扭振信号等作为多传感器融合的信息源。

After analyzing the earth pressure, struts axial force, walls deflection, soil upheave, walls axial force and moment obtained from two tests, we have a good grip of the mechanical characters of PDW and consider that the lateral skin friction between walls and soil is the key to propose a theory about PDW.

在对两次试验中土压力、支撑轴力、墙体变形位移、土层隆起沉降、墙体轴力和弯矩等实测结果进行了深入分析后，加深了对预应力地下连续墙结构力学性状的理解，认为反映墙——土剪切共同作用的侧摩阻力是预应力地下连续墙设计计算理论研究的关键。

The distribution of gear's contact stress, root stress, and contact engagement line in the engagement situation of gear pairs, were obtained on the base of explicit integration method. 3. Adopting the method of system matrix, the torsional vibration differential equation of general shafting was gained. The simple harmonic forms of excitation torque under the normal combustion or piston flameout of in-line engine and v-type engine were analysed. The decoupled algorithm of free vibration and forced vibration and the solution to the vibration damper's energy of resistance and the off-resonance calculation were studied. The sensitivity formulations of the natural frequency and vibration mode to physical parameters of system were derived by solving the eigenvalue problem. These sensitivity formulations provided the theoretical base for the dynamic modification of structure.

运用系统矩阵法建立了轴系的扭振微分方程，并对直列和V型发动机在正常发火和气缸熄火工况下的激振力矩进行了详细的简谐分析；基于精确方法推导了自由振动和强迫振动的解耦算法，给出了能量法计算中的减振器阻尼功求解和非共振计算方法；并研究了曲轴系扭振非线性分析中的变惯量问题，得到了单缸转动惯量的精确求解公式以及变惯量和固有频率的关系式；最后，从特征方程和振型正交性出发，推导了固有频率和振型对轴系转动惯量和刚度等物理参数的灵敏度，为扭振系统的结构动力学修改提供了理论基础。

By using static equilibrium law, nonlinear buckle behavior of string in deep well has been researched. In comprehensive consideration of gravity, contact force of borehole wall, axial friction and tangential friction of borehole wall on the string, pressure and viscous resistance of fluid outside of and inside of a string, differential equation of buckle has been established, which amended computational model of axial load on a string.

应用静力平衡法对深井注入管柱的非线性屈曲行为进行了研究，建立了综合考虑重力、井壁支反力、井壁对管柱的轴向摩擦力和切向摩擦力及管柱内、外流体压力和粘滞阻力联合作用下的屈曲微分方程，对注入管柱的屈曲变形及弯曲附加应力等后屈曲行为进行分析，修正了管柱轴向载荷计算模型。

Turn-table is one of the devices which are used to simulate aerocraft's performance on the ground .

引言三轴飞行模拟转台是飞行器控制系统地面半实物仿真设备之一，属于复杂的机电系统，它存在很多不利于系统性能提高的因素，诸如电路参数的漂移、轴系间的力矩耦合、负载变化等，这些都容易引起参数时变。

Objective To explore the axonal damages in demyelination disease and its time window and morphological features ofdamaged axons.

目的 探讨多发性硬化等脱髓鞘疾病中轴突的损伤以及轴突损伤出现的时间、形态特征。

Our main products are various flanges in accordance with Japanes,American,Brit-ish,German and Chinese national standards.We also produce flange covers,gear blan,axle, roller,alloy casting and strainless steel flange.all our products are made byaddvanced forging methods in the world .

我公司主要生产日标、德标、美标、英标、国际各种法兰盘、法兰盖及不锈钢法兰盘、法兰盖、齿轮毛坯、轴、偏心轴、高合金模块、轧辊等各种碳钢、合金钢锻件，产品全部经锻制而成，具有世界先进水平。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐