Through calculation of a living example and its result analysis verified that while the vibration amplitude is comparatively small and the sine curve is being adopted , the theoretical contour of cam possesses rather good form closure property and is suitable to be applied for high - speed cam 通过实例计算和结果分析，表明该凸轮理论廓线采用正弦曲线，在振幅较小时，有较好的形封闭性，适合用于高速凸轮。
Characteristics of heat balance parameters of arctic ocean drifting ice and open sea are presented based on the profile - flux method and the data obtained by the first chinese national arctic research expedition during aug . 19 24 , 1999 利用中国首次北极考察队于1999年8月19日24日在北冰洋浮冰区获得的大气近地层垂直廓线和辐射等资料，依据相似理论方法，对比分析了北冰洋无冰海面和冰面上热平衡参数的变化特征。
So we can complete the kinematic analysis of the cam mechanism by the analysis of the corresponding assur - group . based on the method , this paper deals with plannar disc - cam mechanisms with different types of followers . the main points of this paper are as follows 基于杆组的分析方法，本文围绕各种类型从动件的平面盘形凸轮机构做了如下工作： 1 .根据凸轮机构的检测数据利用三次周期样条函数插值法对凸轮实际廓线进行曲线拟合。
The results of numerical calculation for four wind shear exponents and seven tower heights shows that taking the wind speed at the rotor centre as the initial uniform design wind speed is reasonable , and that wind shear is independent of the aerodynamics design of a wind turbine 在四类廓线指数、七种塔架高度情况下，利用数值积分方式计算得到的结果表明，采用风轮中心风速做为单一的设计风速是切实可行的，风剪切对于风力机的气动设计基本无关。
The surface solar total radiation is first calculated when albedo is fixed under clear - sky varying atmospheric conditions by using the radiation transfer model and the model atmosphere profile of the middle latitude summer , and a parameterization scheme is then proposed based on the result 首先利用辐射传输模式和中纬度夏季标准大气廓线，分谱带计算晴天各种大气条件下地表反射率取定值时的地表太阳总辐射，并把所得的结果作为标准资料，提出参数化方案。
But there are some different ideas between the shareholders regarding the development of wind profile . this mainly reason is that two shareholders have different views of jth ' s market positioning , thus they have different view in the property right of wind profiler . in addition , there are some technical risk and capital risk in the development of wind profiler 但是在发展风廓线仪上股东之间也存在分歧，这主要是由于两个股东对于金天海的定位不同，因而在风廓线仪的产权上有不同的看法，另外，开发风廓线仪山还存在着技术、资金等风险。
Compare the measured velocity profile and analytical solution of poisoeullie flow shows a good agreement within the most part of the measured region , while the value of the former is higher near the wall resulting from the combined effects of strong flare light and velocity gradient polarization 把获得的测量结果和解析解的泊肃叶流动速度廓线进行比较后发现，在从流动中心到近壁面的大部分区域，两者吻合良好，在近壁面区域，由于示踪粒子和壁面碰撞以及壁面反射光等原因，测量值大于解析解。
In the paper , based on the method of low pair replacing with high pair , the problem of cam design was transferred to that of linkage design . by means of rotary unit vectors , the equations of displacement , velocity and acceleration of the replacement mechanisms were developed . and then , the virtual linkage ' s length and direction were deduced 论文基于高副低代原理，将平面凸轮机构设计与再现函数的平面连杆机构设计统一为同一种方法，运用圆向量函数建立代换机构的位移、速度、加速度矢量方程式，求取虚拟连杆杆长和方向，由此展开凸轮理论廓线、实际廓线、曲率半径和压力角的求解，并得出用圆形刀具加工凸轮时刀具中心的轨迹方程。
Charted with them , and guangzhou time units was preliminarily analyzed as well . secondly , the author introduced the way and the signification of temporal position analyse with examples . thirdly , taking on - the - spot survey method as a practical tool , the author obtained data of temporal distance between each time unit at the verge of different urban districts and the central time unit of the city 论文以广州市为实证研究的对象，对广州的市区范围进行了时间单元的划分并绘制出了时间单元图，同时对广州的时间单元满意率进行了简单的分析；接着以实例介绍了时间区位分析的方法和意义；然后利用实际测量法，在不同时间段测得广州市时间中心到城建连片区各边界点的时间距离，绘制出时间廓线，得出广州市城建连片区的时间形态现状及时间形态的日变化规律。
