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The holistic design of the system and resolved the designs of software and hardware based on VXI bus are put forward according to the demand of test system. The hardware and software is designed, including the formation and design of hardware system, visual instrument software architecture, program design for instrument driver, high speed real-time data collection. In the dynamic test program, the idea of"software is instrument"was applied to meet the diverse test demands. Last, it is proposed that the VXI test system be developed to more totalization and networked. The basic theory of system identification was introduced briefly at first. The principle of spectrum analysis system identification based on Wiener-Hopf equation was expatiated. and the questions in applying Peusdo Random signal as spectrum analysis methods stimulate signal was studied, The generation principle of the peusdo random signal is researched, the characteristic of peusdo random are analyzed from time domain and frequency domain, the inverse repeat peusdo random signal is brought forward to make up the shortage of ordinary peusdo random signal. And a new chaos genetic algorithmis presented to solve the unprecise problem of the traditional method. In the servo valve dynamic characteristic test system, the spectrum analysis methods was applied successfully, the servo valve dynamic characteristic could be acquired rapidly and exactly, the test results were analyzed and the ameliorate methods were brought forward at last.

结合航天某集团液压测试中心测试系统的需求，提出了基于VXI总线的液压测试系统的整体设计方案，完成了测试系统的硬件设计与软件设计，包括硬件系统构成与设计、虚拟仪器软件结构、仪器驱动程序设计、高速同步实时数据采集等内容；以伺服阀动态特性测试为例设计了测试模块，该模块体现了VXI总线仪器软件开发所倡导的"虚拟仪器"的思想，以软件的灵活应用满足了不同的测试需求；结合自动测试系统的发展，研究了VXI测试系统与网络技术结合，实现各种软硬件资源共享，进一步提高设备及数据的利用率和系统的扩展性，使自动测试向综合化、网络化方向发展；研究了伪随机信号作为谱分析法辨识的激励信号时存在的问题，讨论了伪随机信号的产生机理，从频域和时域分析了伪随机信号的性质及其应用，提出了用逆重复伪随机信号弥补了普通伪随机信号的不足，并以混沌遗传算法对逆重复伪随机信号产生过程中的参数进行优化，可以更合理而不是凭经验产生需要的逆重复伪随机信号。

The sixth part: Studies on the dynamic changes of soil retention function value of ecosystem in YUYANG District. Utilized ERDAS8. 5 to interpret the remote sensing image and get LUCC data and vegetation information of YUYANG District. Utilized R2V5. 5 to digitize administrative map, topographic map, vegetation picture, soil distribution map and meteorological website map. Utilized ARCINFOR8. 3 to change every digitization layer to the same projection, to generate Tyson polygon, to structure DEM and do vector polygon overlay. Utilized ARC VIE W3. 3 to obtain the grid data topographic slope and slope length from DEM data of YUYANG District, and then, turned every coverage layer into grid layer and do grid polygon overlay to gain data about dynamic changes of value of soil retention of ecosystem in YUYANG District, at last, the author analyzed the features of the spatial-temporal changes and its reason.The seventh part: Studies on the dynamic changes of fixing drifting sand against wind function value of ecosystem in YUYANG District.

第六部分：榆阳区生态系统土壤保持功能价值动态变化研究；利用ERDAS8.5对遥感数据进行解译获得榆阳区土地利用数据和植被信息，利用R2V5.5数字化榆阳区政区图、地形图、植被图、土壤分布图及气象站点分布图，利用ARCINFOR8.3对各数字化图层进行投影转换、泰森多边形生成、DEM构建和叠加分析，利用ARCVIEW3.3从DEM数据中获取榆阳区的坡度、坡长面域数据，并将上述各图层格网化，然后通过栅格图层叠加分析和代数运算获取榆阳区生态系统土壤保持功能物质量和价值量时空动态变化数据，最后分析了其变化的时空特点及形成原因。

According to the latest development of dynamic weighbridge in home and abroad, the shearing force dynamic electronic weighbridge of uninterrupted rail with wheelscan and axle measurement is more applicable in the development of the high speed dynamic monitoring equipment.

从目前国内外动态电子轨道衡的研究现状来看，轮扫描轴计量式剪力型不断轨轨道衡更适用于这种高速动态超偏载检测设备的研制。

Due to the moving base existence of the minehunting and the frame structure characteristic of the sonar array,a new modeling thought in which the boat body coordinates is regarded as moving coordinates and the whirligig equation of sonar array compared with the self coordinates is founded on the basis of the Eulers theorem and the coordinate transform is introduced. The dynamic equations of minehunting sonar array with the state matrix form are founded by settling the dynamic models with the vector form. So it offers theory foundation for analyzing the dynamic characteristic and designing robust control.

由于猎雷艇作为动基座的存在和声纳基阵的框架结构特点，提出了以艇体坐标系为运动坐标系，运用变形的欧拉定理和坐标变换建立声纳基阵相对自身坐标系的旋转运动方程的建模思想；将所建立的矢量形式的动力学模型展开整理，获得了状态矩阵形式的猎雷声纳基阵动力学方程，为系统动力学模型的实用化奠定了基础。

The results show that for the wood surround the SiO2 alcogel supercritical drying process of the dynamic and static press is 25 MPa, the dynamic press time is 180 min, the dynamic and static dry temperature is 50℃.

结果表明：由于受到木材的包围，木材－SiO2醇凝胶复合材的超临界干燥工艺条件最终确定为动态和静态干燥温度为50℃，动态和静态压力为25MPa，动态干燥时间为180min。

Results show that there exist considerable differences in dynamic sights among the trainmen who have similar static sights, that the static sight cannot completely reflect the dynamic vision apperceptive ability, and that both the dynamic and static visions are important indexes for trainmen that cannot be neglected.

结果表明：静视力相同者，动视力差异较大，静视力不能全面反映乘务员动态视觉感知能力。

Based on detailed study on mechanism of earthquick disaster and the progress in methods of dynamic analysis, combining Huangjinping Asphaltic Concrete Core-wall Rockfill Dam which will be constructed in DADU river, the paper uses 3D dynamic FEM to analysize the states of dynamic reaction and stability.

本文在深入分析土石坝震害特点与动力计算方法的基础上，结合大渡河上拟建的黄金坪沥青混凝土心墙堆石坝进行了三维有限元动力分析。

These indexes describe the fabric's thermal properties during the heated process. The heat insulation ratio preferably manifests fabric's insulation property; the difference of calefactive ratio describes dynamic conditions average calefactive case; effective thermal conductivity and compound thermal resistance are mainly considering the wholly testing characteristics and describing the compound thermal property; the response time expresses the time of step response during dynamic testing process. 3. Dynamic heat transmitting properties of fabrics and warmth retention testing methods have been developed; many different textile materials are used for actual test, and the data are analyzed, illustrated, and compared.

这些指标从不同的侧面描述了试验过程中织物试样的传热隔热性能，其中隔热率是从整体上来考虑的指标，它较好的描述了试样的隔热保温性能；升温速率差考虑的是动态变化过程中平均升温变化情况，它的大小表现了织物热性能的差异；名义导热系数和复合热阻是从试验装置的特点出发整体来考虑的热传递指标，描述了铜板、试样、铜板三者复合时的传热性能与隔热性能；而温度动态响应时间表示动态热传递过程中趋于稳态所经历的时间。

Therefore, the in-depth research on the process of dynamic loads when braking ,the analysis about the causation and influence factor of the dynamic loads" emergence is necessary to the design of the circumgyrate machinery Aim at above problems, this text treats the portal crane"s boom system as a research object ,using finite element analysis and mechanism kinetics as theories foundation and analysis means ,utilizing ANSYS8.1 to research the dynamic effect of the crane boom under the circumstance of braking.

针对以上问题，本文以MQ4033门座起重机臂架系统为研究对象，以有限元和机械动力学为理论基础，运用ANSYS8.1对臂架系统在回转制动时的工况进行动力学分析，获得了臂架系统的模态特征以及在回转制动时的动力响应。

Since the entitative investment of FDI is a part of imports, the conclusion verified above guarantees the rationality of the dynamic effect of FDI to economic growth. The dynamic effect of imports to economic growth guarantees the rationality of dynamic action of FDI to economic growth, which ensures the correctness of the related variables entering some models in following research.

由于作为实物投资的FDI是进口的一部分，进口对经济增长的滞后的推动作用在从理论上保证了FDI对经济增长动态作用的合理性，保证了后续研究中相关模型变量设置的正确性，这个成果也是研究FDI与技术进步相关关系的基础。

The production moved off-Broadway to New York City, where she won the Joseph E. Calloway award for her performance, and was profiled in American Theater Magazine as one of ten young theater artists to watch.

生产提出过百老汇的新的纽约市，在那里她赢得了约瑟夫calloway奖，她的表现，并于异型在美国的战区杂志之一， 10战区的青年艺术家观赏。

It's a risk tradeoff, and I believe that adding test support code usually wins.

这是一个风险的权衡，我相信添加测试代码通常会占上风。