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In this paper, the statistical characteristics of one plane and one helicopter's RCS dynamic measurement data are studied by using the χ^2 distributing, log-normal distribution and Rayleigh distributing model, along with the Kolmogorov fit test to goodness, the fitting results in some notableness level are acquired by using the three models for different aspect angles for two targets, and the degree of freedom distribution of χ^2 model in all aspect angles is obtained for two targets' RCS data.

文中以某歼击机和直升机为对象，应用χ^2分布、对数正态分布和瑞利分布模型，以及Kolmogorov拟合优度检验方法，研究其RCS动态测量数据的统计分布特征，得到了在一定显著性水平下，两种目标在不同视向角下对三种模型的拟合效果，同时得到应用χ^2分布拟合时模型半自由度随视向角的分布情况。

Further more, the thesis lucubrates some key techniques: aiming at the management of the distributed objects, we skillfully construct the isomorphic project object tree for the real projects structure by using the CORBA naming service, and laconically and effectively implement the management of the services and modules by using the location service. And we also propose a design which uses CORBA event service and Borland MIDAS to implement the distributed data service in a creative way and analyze the advantages and disadvantages of this design at the same time.

并针对一些关键技术做了深入的讨论和分析，例如针对整个系统的分布式对象的管理，巧妙地借用CORBA的名字服务构造了同构于实际工程组织的工程对象树，同时使用定位服务简洁而有效的实现了对服务和模块的管理；针对分布式数据库的实现，创造性地提出了一种使用CORBA事件服务和Borland MIDAS组件来实现分布式数据服务的设计，并实现了这个设计，同时分析了这种设计的优劣。

In this paper,a threshold authentication scheme of ad hoe network based on elliptic curve is proposed,in using Lagrange Theorem to generate the group key and in using the digital signature algorithm based on elliptic curve to generate and merge the sub certificates.

论文提出一种基于椭圆曲线的门限身份认证方案，利用拉格朗日定理生成群密钥并利用椭圆曲线数字签名算法生成子证书并合成，该算法的安全性、高效率以及低计算复杂度特别适合Ad hoc网络移动自组的特点。

This paper reports something about it .The callus was induced and proliferated by using young stem , leaf and leafstalk as explants .which came out in early spring . In this paper , its effects on induction and proliferation were discussed by using different kinds of explants and hormone and different physical and chemical factors.The growth circle and some physiological and biochemical factors were studied during the culture of callus, a set of rapid propagation techniques were founded, which was rapid, efficient and steady.

本文以丹参初春萌发的幼茎、叶、叶柄为外植体，探讨了不同的外植体、不同的植物生长调节物质、不同的理化因子对愈伤组织的诱导和增殖效应，研究了黑暗和光照条件下愈伤组织细胞培养生长周期以及生长周期中生理生化指标的变化特征，摸索了一套快速、高效、稳定的丹参快速繁殖技术，为丹参组织培养、次生代谢物的生产提供理论依据，为丹参快速繁殖应用于生产提供技术支持。

"He's using his left hand, using his length," Brown said.

"他现在能用左手了，更会利用自己的高度"，布朗说，"他现在打得很好"。

Three of them had right breast cancer and remainder had left breast cancer. For each patient, three-dimensional calculations were performed using full set Computer Tomography-slices. All calculations were done using 6MV-photon. The dose distribution of planning target volumes and critical organ were analyzed. Result: Both 3D and FIF technique provided acceptable planning target volumes coverage with 90% of the PTV receiving 100% of the prescribed dose in all cases.

本研究收集六位乳癌病人，其中包含三位左侧乳癌和三位右侧乳癌，每位病人都接受电脑断层摄影治疗规划，分别以3D和FIF两种技术做治疗计划，分析并比较其计划治疗体积和重要器官的剂量分布。

On the other hand,there has been so far no mapping method and software that can be used to map dominant-recessive markers obtained from F2 population of lepidopteran species.To resolve this problem,two-point and three-point maximum likelihood methods for mapping dominant-recessive markers using F2 population of this type of species were developed in this paper.At,the same time:we also gave a general method for constructing the gene linkage map of this type of species using F2 population.

另外，目前还没有任何方法和软件可以用杂交F2群体来作图鳞翅目类昆虫，如家蚕等连锁图谱，为了解决这一问题，本文发展了用F2群体作图这类昆虫连锁图谱的两点和三点极大似然法，同时还给出了大群体作图形态基因连锁图谱的一般方法。

In the chapter 3, the development and characteristic of TM image and DEM is explained generally. In following chapter, how to measure backwater curve using remote sensing and DEM is particular expounded, including revise the backwater curve using water level data which is measured by hydrology station.

在第三章中概括性的叙述了TM遥感影像与DEM的发展过程及特点，在随后的章节中详细的阐述了遥感影像结合DEM测定水库回水曲线以及利用水位站点实测数据进行校正等内容。

With application of plastic limit analysis method using finite element method, stability of high loess slope is analyzed and solved by using linear programming method in this paper. Safety factor and stress fields and velocity fields of slope can be obtained.

本论文采用有限元塑性极限分析法对黄土高边坡进行稳定分析，并运用线性规划的方法对稳定问题进行求解，可以得到边坡的稳定安全系数和边坡的应力场及速度场。

Firstly, several kinds of schemes were proposed according to the design demand. The best scheme was chosen after analyzing and comparing the schemes. The robot's structure was designed with Pro/Engineer and AutoCAD software. Secondly, the kinematics analysis conducted, coordinate transformation matrix using D-H method was set up, and the kinematics equation direct solution and inverse solution was deduced. The manipulative interface about the kinematics equation direct solution and inverse solution was completed with VC++ and the velocity Jacobian of displacement matrix was constructed using differential transform method. In the process of the trajectory planning based on robot's kinematics analysis, I propone a method by which we can get middle nodal point with normalizing factor in order to simplify our searching for these middle nodal points. In addition, I give these middle nodal points with actual physics signification. For eliminating contradiction between real-time and accuracy, I bring forward separately limit of error and reversal interpolation method. For decreasing calculation quantity, we resort to tri-spline interpolation in the articulation space.We analyse the work range of the robot by resorting to graphic means.

首先，作者针对机器人的设计要求提出了多个方案，对其进行分析比较后，选择其中最优的方案后用Pro/Engineer和AutoCAD软件进行了机器人模型结构设计；其次，进行了运动学分析，用D-H方法建立了坐标变换矩阵，推算了运动方程的正、逆解，运用VC++制作了正、逆运动学求解的求解界面；并且用微分变换法推导了速度雅可比矩阵；在基于机器人的运动学的轨迹规划中，通过在操作空间的规划，提出了归一化因子来求解中间结点，通过它可以使求解中间结点变得更简单，并且赋予这些中间结点实际的物理含义，对于规划中精确性和实时性的矛盾，提出了以误差极限法和反向插值法来解决的方法；为了减少规划过程中计算量，在关节空间进行三次样条插值；然后借助图解法进行工作空间分析，作出了实际工作空间的轴剖图。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。