查询词典 custom-designed

Keyword index is a data structure that allows us to search in constant time for documents containing specified keywords. Unfortunately, standard index constructions are not designed for encrypted documents, because they may leak some information about the document. In this thesis, we propose two index structures called PRP-Index and P-Index which are designed for encrypted documents.

中文摘要关键字索引搜寻为一种加速文件关键字搜寻的一种架构，但是随著文件的安全性越来越受到重视，文件开始以加密的型态储存於资料库，但是目前的索引架构并没有针对加密文件作考量，也因此索引有可能会透露出文件的相关资讯，造成安全上的问题。

The luminescence power of semiconductor laser diode is tested after the radiator element of laser diode is made and the drive circuit is designed. Then, chaos mathematic model is introduced to produce deterministic class stochastic signal and C langrage program, which is based on the hardware circuit design of MSP430, is designed and on-line debugged to implement the dynamic stimulation effect and avoid the body adaptability with the duty cycle of chaos sequence. The duty cycle is adjusted and controlled to accomplish the reinforcing and reducing in moxibustion. At last, Average power of laser diode is tested under the conditions of different duty cycles and the waveforms are collected by applying virtual instrument.

在半导体激光器散热装置的特别制作及工作驱动电路的设计基础上，完成半导体激光器发光功率的测试，然后引入混沌数学模型方法来产生确定性的类随机信号，在 MSP430 单片机硬件电路设计的基础上，应用单片机 C语言进行程序设计并在线调试，实现传统灸法的动态刺激效果，采用混沌序列占空比信号消除人体适应性，调整和控制输出占空比的改变以达到灸疗的补泻手法的实现，最后对不同控制占空比情况下激光器输出的平均功率进行测试，完成工作波形的采集。

Through the characteristic parameters, the system's real-time moment of inertia is given. Then golden section adaptive control law and logic derivative control law both based on moment of inertia are designed. The two kind of control laws are combined to control the attitude of spacecraft and their simulation results are compared with the ones of PD control law which is designed based on the certainly-known system model. The results show that this adaptive control law is effective on the kind of time-variable system studied in this paper.

根据特征模型的参数推算了系统实时的转动惯量，设计了基于转动惯量的黄金分割自适应控制器和逻辑微分控制器，将这两种控制器相结合对带有可伸缩挠性附件的刚体进行姿态控制，仿真结果与基于确知系统模型所设计的变系数PD控制器相对照，表明了该自适应方法控制一类时变系统的有效性。

Using this method, the controller design for performance and robustness can be designed separately, which has the potential to overcome the conflict between performance and robustness in the traditional feedback framework. Third, to make the vehicle meet the performance index in full flight envelop, a H∞ gain-scheduled controller based on Linear Varying Parameter system are designed. A LPV plant with a linear fractional dependent variable can be represented by upper LFT (Linear Fractional Transformation) interconnection.

通过把非线性系统简化为了线性变参数系统，再有通过线性分式变换将LPV系统转化为一个线性定常系统和不确定性组成的LFT互联形式，使之转换成为一个经典鲁棒控制问题，然后通过求解一组线性矩阵不等式得到变增益H_∞控制器。

Chapter four (application of chaos in measurement field): In this chapter firstly the sensitivity of initial values and parameters that chaos can be used in the measurement field has been analyzed quantitatively, on this basis, the necessary conditions of chaotic system that can be used in measurement are concluded and presented; then the mechanism of measurement implemented by subsection linear map chaotic system, the coordinating relationship between chaotic output signal and the values being measured , and the precision of system measurement are further analyzed quantitatively . And a chaotic voltage measurement system using DSP is designed. Secondly a basic thought that thesensitivity of chaotic parameters can be used in measurement is presented and simulated. Its theoretical testing circuits are designed.

第四章(混沌在测量领域中的应用)首先对混沌可用于测量领域的初值敏性和参数敏感性进行了定性分析，在此基础上，归纳并提出了可用于测量的混沌系统应具有的必要条件；定量地分析了分段线性映射混沌系统实现信号测量的基本原理、输出混沌序列与被测量间的数值对应关系及系统的测量精度等问题；并以DSP为核心设计了混沌型电压测量系统；其次提出了混沌参数敏感性用于测量的基本思路，并对此进行了计算机仿真及原理性实验电路设计。

According to the ridges had the continuity in the local area, an intelligent algorithm of smoothing the direction map was proposed, and then according to the direction map the template of direction filter was designed, then the fingerprint image with the designed template was filtered and the binarization image was obtained.

并根据指纹图像在局部范围内纹线连续的特点，提出了一种智能的平滑方向图算法，再构建方向滤波模板进行方向滤波，得到指纹二值化图像。

The results show that there will be slight decrease of the control efforts when the mean absolute value or the root mean square value of the optimal control force is taken as the maximum designed control force, while the maximum control force of MR damper can be decreased by 85% compared with the maximum optimal control force. The decrease in the designed control force can not only significantly increase the capability of MR dampers, but also reduce the dimension of MR dampers for pratical application in engineering.

研究表明，当设计值取最优控制力的平均绝对值或均方根值时，MR阻尼器的最大控制力比最优控制力的最大值降低了85%，而控制效果降低不多，可以满足对结构的控制要求；降低最大控制力设计值后，不但可以充分发挥MR阻尼器的出力性能，而且可以缩小MR阻尼器的设计尺寸，便于工程应用。

The mold was designed by the Mission directions, through the analysis, in the technical requirement of vase tops. The designed included: vase tops sample selection of material and injection machine, indication of the mold cavity number, selection of The branch mould, equipment of mold cavity, pouring system, structure and style of drawing of patterns ,cooling system, structure and admittedly fix of hollow and Standard, style of exhaust.

此次课程设计通过对点滴瓶瓶塞的生产技术要求的分析，以模具设计任务书为依据设计模具，设计包括熟悉瓶塞图样，材料的选用，注塑机的选择，型腔数目的确定，分型面的选择，型腔的配置，浇注系统，脱模方式，冷却系统和脱模机构，凹模和型芯的结构和固定方式，排气方式等。

Around the topic, the weak points of the traditional platform is analyzed first, such as complex arithmetic, long calculating time, high needs of hardware and so on. A real time control method based on virtual simulation is suggested to separate the complex positive/negative calculation of space kinematic and real time motion control. And a"3-2-1"type 6DOF platform is designed with the reference of the MAST (Multi-Axis Shaking Table) of MTS. The kinematic and dynamic calculation of the platform is finished. According to the calculating result, the control system of the"3-2-1"type 6DOF platform including 6 linear servo electric cylinders is designed and constructed. And the professional software Pro/E is used to do the 3D model and 6DOF motion simulation of the platform. The motion curves of the pistons of the 6 cylinders are exported with the simulation. At last the control software is programmed with Microsoft Visual Basic 6.0 and realizes the functions with the commands of GE series motion controllers. When loading the motion curves exported with the simulation, every cylinder can follow the curve very well and the platform realizes the hoped 6DOF motion.

围绕选题，本论文首先分析了传统的运动平台控制方法所存在的算法复杂、解算耗时长、硬件需求高的缺点，提出了一种基于虚拟仿真的实时控制方法，该方法将复杂的空间运动学正、反解与实时运动控制相分离；之后，参考MTS公司的MAST多轴振动平台，设计了新型的"3-2-1"型六自由度平台，并进行了运动学及动力学计算，根据相关计算结果，设计与搭建了包括驱动6个直线伺服电动缸在内的"3-2-1"型六自由度平台控制系统；接着，使用Pro/E对"3-2-1"型六自由度平台进行了三维建模和六自由度运动学仿真，并由仿真直接获得了6个直线伺服电动缸的活塞杆的相应运动曲线；最后使用Microsoft Visual Basic 6.0编写了控制软件界面，通过调用GE系列运动控制卡的各种命令函数实现了控制系统的相关功能，而当加载仿真得到的各缸运动曲线后，每缸均能很好地跟踪输入曲线，使平台实现了期望的多自由度运动。

This thesis focus on GPS application in magnetic suspension engineering:① the formulation of oblique cylindrical projection is worked out according to characteristics of long distance precise engineering and map projection theory. The author has developed an application to accomplish coordinate conversion from generally used coordinate systems to oblique Maglev Coordinates System.② considering not only project peculiarities but also position of control points, selection of initial points, connection type, selection of repeat baseline and ground observed quantities, GPS network is designed on electronic map and we may extract GPS network information by program developed using Visual Basic 6.0 while the results are stored in control point file and baseline vector file.③estimate accuracy of various GPS networks designed on electronic map by method of 2D restriction adjustment. GPS network simulation design and accuracy estimate come true.④Predominate the rules how connection type , repeat baseline and precise baseline of range finder influence GPS network precision through comparing accuracy of various GPS network. Thereby, the solution how to establish GPS network in long distance precise engineering is figured out.

本论文主要研究GPS技术在磁悬浮工程中的应用：①根据长距离精密工程的特点，从地图投影原理出发，推导出斜轴圆柱投影的应用公式，并编制计算软件，实现从常用坐标系统向斜轴磁悬浮坐标系统的转换计算；②在AutoCAD电子地图上，根据工程的需要，并充分考虑控制点的点位、起算点的选择、连接方式、重复基线的选择和地面观测量的选择等因素，在电子地图上进行GPS网的设计，根据Visual Basic 6.0语言编程，提取出GPS网资料，保存在控制点文件和基线向量文件中；③对在电子地图生成的各种类型的GPS网进行二维约束平差的精度估算，实现了GPS网的模拟设计与精度估算；④通过对各种控制网的精度比较，掌握连接方式、重复基线、精密测距仪基线对GPS网精度影响的规律，解决了长距离精密工程GPS网的建立方法。

After explaining total design of automated test system for microcircuit , the thesis introduces GPIB standard .

文章在说明了微电路模块自动测试系统的总体设计后，对GPIB标准进行了介绍。

He interceded in my behalf.

他替我说情。