高速度

Generally speaking, the high group velocity and low attenuation factor and high Q〓 in the same area, but relatively low group velocity and high attenuation factor and low Q〓 in the same area in China is the general distribution.

在不同周期，面波衰减系数或品质因子在整个中国大陆区域分布是不均匀的；总体表现为高群速度分布的区域呈现高Q〓和低衰减系数、低群速度分布的区域呈现低Q〓和高衰减系数分布的特点。

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。

The friction characteristics of polyurethane for the friction liner of hoisting were studied. It was found that the dynamic friction coefficient of polyurethane increases with sliding velocity in the range of 0.01 to 0.4 mm/s and decreases beyond 0.4 mm/s.

本文研究了聚氨酯弹性体摩擦衬垫材料的摩擦特性，发现聚氨酯弹性体材料的动摩擦系数是和滑动速度有关的，在0.01～0.4mm/s的速度范围内，速度提高摩擦系数上升，在更高的速度下摩擦系数还会下降。

Directed against the designed parallel welding head mechanism of IC chip pasting machine,the movement equation was established,the positive solution of motion equation was presented,and the positive and reverse solutions of velocity and acceleration were derived.

高速高精度IC芯片粘片机是IC芯片封装的主要设备之一，其粘片速度已超过10 000次/h，定位精度达微米级，而且粘片速度和定位精度有越来越高的趋势[1]，但目前国内外IC芯片粘片机的焊头机构都采用串联结构的形式，运动部件的惯量很大，不利于粘片速度和定位精度的提高。

ELISA showed that antibody responses induced by propolis vaccine were faster than that of oil-emulsion vaccines and aluminum hydroxide vaccines;antibody responses induced by oil-emulsion vaccines were longer in duration than that of propolis vaccines and aluminum hydroxide vaccines;the maximum antibody responses induced by oil-emulsion vaccines and propolis vaccines were higher than that of aluminum hydroxide vaccines;Antibody levels were all significantly boosted by revaccination of these vaccines and in addition to this,oil-emulsion vaccines showed longer antibody duration.

这七种疫苗在抗体产生速度方面以蜂胶苗较快，而油剂苗和铝胶苗免疫后抗体上升速度较慢；在抗体水平的维持能力方面，油剂苗较蜂胶苗和铝胶苗更强；在产生最高抗体水平方面，油剂苗和蜂胶苗能力相当且较铝胶苗为高；在加强免疫的效果方面，这些疫苗二次免疫所产生的抗体水平均较一次免疫更高，蜂胶苗和铝胶苗在第93天时的二免抗体水平已降至同一免相当，但此时油剂苗有着较一免更高的二免抗体水平。

The quantity computed is the expected clutter power at the output of any specified range gate by the method of integrating reflected energy between constant Doppler loci in range-gate circles with a model of sum and difference antenna gain pattern for APAR. Base on the analyzing of APAR terrain clutter spectrum, Rayleigh, Correlated Log-Normal and Weibull distribution terrain clutter of APAR general pulse signal was simulated with the method of zero memory nolinearity transform.④The Doppler frequency of target echo is simulated on video frequency in this dissertation.

该软件采用了用C语言建立框架结构，而在程序高重复部分和有运算速度要求的地方，用汇编语言编写具有高并行能力程序的方法，不仅满足了系统高运算速度和实时性的要求，也使得软件系统结构模块化，代码具有良好的维护性和重用性；③对机载相控阵雷达HPRF、MPRF的和、差通道地面杂波功率谱进行了较为全面的研究，通过建立由四个子波束构成的机载相控阵雷达杂波和差波束天线方向图数学模型，选取体现高度线杂波的修正的地面后向散射模型，以载机平飞为例，采用沿距离门——等多普勒线区域积分的方法，得到了杂波功率谱，并利用零记忆非线性变换法实现了机载相控阵雷达常规脉冲情况下瑞利分布、对数正态分布和韦布尔分布地面杂波的模拟；④提出了采用在视频上对目标回波的多普勒频率进行模拟的方法。

With a comprehensive study on the development of ellipsometer both at home and abroad as well as an analysis of the problems undermining HST-1 ellipsometer such as low effeciency in measuring, poor precision and ISA, this paper applies the master-sercice framework with USB interface into the designing of a precise reflectional null ellipsometer according to the principles by which the null ellipsometer works.

摘要本文综述了椭偏仪的国内外发展状况，分析了原来HST-1型椭偏仪存在的问题，如测量速度慢、精度不高和ISA接口等，根据消光式椭偏测量原理，采用了USB接口的主从机系统框架，设计了一台高精度反射式消光法椭圆偏振测厚仪样机，并对该仪器进行了大量的测试，测试数据表明该仪器测量精确度高且速度快。

That is why some hydrophobic ingredients should be added in order to made floating tablet with ideal floating duration other than decreasing the tableting pressure alone.According to the eroding kinetics, the floating tablet made of HPMC with greater viscosity as K100 MCR and K15 MCR is better than that made of HPMC E 15 LV. The erosion of the tablet made of HPMC E 15LV followed the first order kinetics. 20% of the tablet eroded with 4 hours which is 22 times that of the tablet made of HPMC K 100 MCR. The fast erosion of the tablet made of HPMC E15 LV led to quick buoyancy decrease. The quick swelling of floating tablet made of CMC-Na led to quicker water uptake.

溶蚀动力学表明，以高粘度HPMC K100MCR和K15 MCR制备的漂浮片，其漂浮性能要优于低粘度的HPMC如E15-LV，后者的溶蚀符合一级动力学规律，4小时内片面溶蚀达20％，溶蚀速度比前者大22倍，由于速度太快，漂浮制剂的漂浮力因此会迅速降低；高分子材料CMC-Na制备的漂浮片，虽然遇水后迅速膨胀使体积增大，但是，由于水渗入的速度大于体积膨胀的速度，因此不能产生足够的浮力和维持理想的持续浮力，另外，这种材料制备的漂浮片的溶蚀速度太快，4小时内片面溶蚀达30％，漂浮制剂的漂浮力也因此会迅速降低。

With the uprising movement of Chinese railways and progress of electric railroad, the small tonnage full hydraulic railway crane becomes more urgently needed for development with characteristics of fast speed self-propelled running and high speed in train formation, hence, the high level requirement is resulted in terms of train formation and self-propelled running speed of railway crane. For 20t universal railway crane, features such as running with the load and weight lifting due to high hauling capacity are required besides hook lifting, bucket grabbing and magnetic panel lifting.

随着我国铁路事业的不断壮大，电气化铁路的发展，开发小吨位的自力走行速度快、回送速度高，能满足电气化线路的立杆作业的全液压铁路起重机迫在眉睫，对铁路起重机的回送和自力走行速度有了更高的要求。20t多功能铁路起重机，即具有吊钩、抓斗、磁盘吊3种功能外，还具有一定带载走行以及因牵引能力大也可作为吊车机使用。

By contrasted with silica gel, the corn hull desiccants by hydrolyzation method and heat treatment method have advantages as stabilization on moisture adsorption, less water of reversible adsorption and high moisture adsorption ratio in high humidity. These desiccants have disadvantages as lower moisture ratio than silica gel in low humidity and slower moisture adsorption speed than silica gel. The corn hull desiccant by derivation method has advantages as high moisture adsorption ratio, high moisture adsorption speed, stabilization on moisture adsorption and hardly any water of reversible adsorption.

通过与变色硅胶干燥剂的对比，通过水解法和热处理法得到的玉米渣皮干燥剂的优点是吸水稳定，可逆吸附水少，在高湿度下吸水率高，不足是在较低的湿度下，吸水率比变色硅胶干燥剂略低，吸水速度比硅胶慢；通过衍生方法得到的玉米渣皮干燥剂的优点是吸水率高，吸水速度快，吸湿稳定持久，几乎不含可逆吸附水，不足是再生后产品容易结块。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。