查询词典 constant force

Researches show that the drive force characteristics of the electric tractor drive system based on series DC motor is close the ideal characteristics, the curves are concave, low speed with constant power, and high speed with constant torque; the electric tractor has large working speed under different shifts, but the extensive coincidence speed shows that the variable ratio of the gear is unreasonable; the maximum climbable gradient of this electric tractor is more than 30%, and does not need frequent shift when working for its extensive climbable gradient; there are many influence factors of continuous working time, which the more obvious factors are working speed and working load, the working time increases with the increase of the working speed and working load.2. Simulation researches on the drive characteristic of the electric tractor.

研究结果表明：基于串励直流电动机(来源：ABC21论文网www.abclunwen.com)的电动拖拉机电驱动系统的驱动力特性场接近理想驱动力特性场，其各挡下的驱动力特性是一组下凹的曲线，低速恒转矩，高速恒功率；同一行驶速度下所对应高挡驱动力大于低挡驱动力，这是由电机的调速特性决定的；电动拖拉机各个挡位下具有较广的稳定作业速度范围，但是各个挡位之间速度重合的范围较多，说明所用变速箱变速比与电动机匹配不合理；电动拖拉机最大爬坡度达到30%以上，并且各挡爬坡度变化范围较广，作业过程中不需要频繁换挡；影响电动拖拉机连续作业时间的因素较多，其中作业行驶速度和作业负荷影响最为明显，作业负荷越大，连续作业时间就越短，作业速度越快，连续作业时间就越短。2、电动拖拉机驱动特性仿真研究。

Chapter six presents such new concepts as margin utility contribution force, profit-risk exchange rate, state-expectation-variance utility function, long-term expectation-variance utility curve and optimal portfolio expansion curve. The state-expectation-variance analytical method is developed from the expectation-variance analytical method. The changing rate of profit-risk exchange rate to state variable is used to define and distinguish the decreasing, constant and increasing relative risk aversion. A decomposition formula about the margin contribution force of holding wealth to state-expectation-variance utility function is displayed. The decomposition formula demonstrates that the contribution force of investors' holding wealth to their utility is composed of the pure contribution force of holding wealth and the investment contribution force bronght about through investment portfolio.

第六章提出了边际效用贡献力、收益—风险替换率、状态—期望—方差效用函数、长期期望—方差效用曲线、最优证券组合扩展线等新概念；把期望—方差分析方法发展成状态—期望—方差分析方法；用收益—风险替换率对状态变量ω的变化率来定义和区分递减、定常、递增相对风险厌恶；获得了持有财富对状态—期望—方差效用函数的边际贡献力的分解式，该分解公式表明投资者的持有财富对他的效用的贡献力由持有财富本身的纯贡献力和持有财富通过投资证券组合所产生的投资贡献力所组成。

In the base of calibrating the elastic constant of cantilever and analysis adhesion force, the force information from force curve was obtained and the elastic modulus of single voxel was calculated.

考虑了成型点剩余部分形变对结果分析的影响，在标定微探针弹性系数和对粘附力进行分析的基础上，提取了力曲线中所包含的力学信息，推算出了成型点的弹性模量，得到了成型点的弹性模量低于宏观材料弹性模量的结论。

Associated Spring Raymond manufacturer that specializes in producing washers compression spring, extension spring, torsion spring, battery spring, conical spring, garter spring, constant force spring, disc spring, urethane and gas spring, Belleville, curved finger and wave washers, disk spring, clip nuts, rings, kits and specially fasteners, Precision stampings and etc. and acquired International CE certificate, TS 16949, QS9000 and ISO 9001 certificated.

至今已在美国、巴西、墨西哥、加拿大、英国、法国、德国、荷兰、瑞典、新加坡、上海、天津、日本、台湾、香港等地设有工厂及办事处，目前可生产各种标准和非标的精密弹簧、模具弹簧、碟形弹簧、氮气弹簧、蛇形弹簧、涡卷弹簧、机械弹簧、热卷弹簧；冲压件和紧固件等精密元件，并通过了QS9000和TS16949，ISO9001等质量认证体系，广泛用于电子通讯、汽车、电器、机械及设备、塑胶、模具、军事、航天、海运业、医学、生物化学等工业领域。

A boundary integral formulation describing constant-αforce-free field with finite energycontent in the semi-infinite space above the sun was proposed(Yan,1995), this formulationcontains boundary field and its normal gradient under integral sign.

颜毅华1995年在太阳物理杂志上发表一文，就太阳磁场提出了一个具有有限能量的线性无力场模型，并对磁场给出了一个边界积分表示公式，该公式用边界上的已知磁场值和未知的磁场法向导数值来确定空间任意点的磁场值。

Estimate the force constant k of a Z-H bond, assuming that there is a linear proportionality between force constant and bond enthalpy.

键的键合常数，焓的线性比例关系。从这些信息中推测 Z 的原子量。并给出 Z 的元素符号。

It is imperative that constant force be maintained between the extrusion and hyalinization phases; otherwise, the desired orthodontic movement will not take place.

当务之急是保持恒定力量之间的挤出和透明的阶段，否则，所期望的矫正运动不会发生。

While sustaining constant force, isometric muscular contraction, the initial past decreasing rate of medium frequency curve, the absolute value of the fitting straight line slope, was increased with the degree of the muscular fatigue. With this rate, it was possible to quantitatively judge the state of the muscular fatigue, reduce the physical consumption and muscular uncomfort of recipients.

在维持等长、恒力肌肉收缩时，f＿曲线初始段下降率（即拟合直线斜率的绝对值）随肌肉疲劳程度的增加而增加，因此希望能用f＿曲线初始段的下降率来定量判断局部肌肉疲劳的状态，以减少受试者的体力消耗和肌肉不适程度。

There are three constraints on the rheological structure of the lithosphere, namely, constant strain rate, constant tectonic force and the strainratedependent force. However they can not describe the realistic distribution of the strain rate in the lithosphere.

对目前存在的3种应变率约束条件（常应变率，常构造力，与应变率有关的构造力约束）进行了讨论，它们都不能真实地反映岩石圈内的应变率分布及实际观测。

Based on magnetic circuit method, the conditions to obtain constant force-displacement characteristic are derived.

提出了一种新的矩形截面直流电磁铁结构，得出恒定的力－位移特性。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。