整个系统

According to the method, only the most abstract category can be the logical starting-point in the whole categorical system.

按照这个方法，作为整个范畴系统的逻辑起点，应当是整个系统最抽象的范畴。

The first one mainly introduced engineering calculate method of load and selected the all electric implements. They are in charge of the motor four rotation states, and the sensor is in charge of testing the position of helicopter airscrew and display by computer. The second one designed the controller of the motor based on low-voltage electric implement and analyzed the all system.

第一部分，主要介绍了负载参数的工程计算，选取整个系统的电气元件，电气元件部分主要负责双速电机的正向、反向和高、低速旋转状态，测速传感器用于完成对桨距位置的检测和最终的显示任务；第二部分，设计了基于低压电器的总桨距调节控制器，并对整个系统进行详细的分析。

First, in this system, advanced 16-bit microprocessor 80C196MC is used to sample signals from industry cense. This makes it impossible to have a higher speed in data processing. Second, a kind of Field Bus-CAN is applying to build whole system into a more reliable, advanced real-time control network.

其次，通过现场总线技术将整个系统组成网络，实现了节点之间数据共享，并且整个监控系统更加稳定可靠，现场控制性能更为出色。

Secure information EMM and ECM are the core of the whole conditional access system, their secure transportation and generation relate to the life of the whole system.

安全信息EMM和ECM是整个条件接收系统的核心，因此，它们的保密传送及产生都关系到整个系统的生存。

The design adopts distribution control system to control the entire system, a higher plane Kingview configuration software for real-time monitoring, the use of spaces on-site Plc programmable controller data collection and use Profibus-wide achieve higher plane of spaces and data exchange between aircraft.

整个设计采用了集散控制系统对整个系统进行控制，上位机采用组态软件组态王进行实时监控，下位机采用可编程序控制器PLC进行现场数据采集，并采用PROFIBUS现场总线实现上位机与下位机之间的数据交换。

In the design of this complex system, the location of regional distribution center is the key problem.

在整个系统的设计中，分销网络的设计是一个关系到整个系统业绩的关键问题。

On the base of studying application methods and relative information of the relative chips, the paper designed the system hardware ,including LCD interface designing、video gathering chip and its peripheral circuit designing、FPGA chip and other module interface designing; 3、The LCD controller module、video in controller module、configuration initialized module of the video image decode chip、FPGA and program of module interface were all compiled and debugged in the paper. 4、The whole system debugging was carried through, and the video image data storage and displaying on LCD screen was carried out in the paper. The paper first designed the system frame, then designed hardware platform according to the system frame and then analyzed it、debugged it, finally,compiled the module code and debugged the whole system to achieve system requirements.

本文具体研究工作主要体现在以下几个方面： 1分析了的嵌入式视频图像采集、处理与LCD显示系统的总体需求，设计了基于NIOSⅡ的嵌入式系统总体架构； 2在学习相关芯片的具体应用方法和相关知识的基础上，设计了系统的硬件，包括LCD接口设计、视频采集芯片及外围电路设计、FPGA芯片和其他模块接口主板设计； 3编写并调试了LCD控制器模块、视频输入控制器模块、视频解码芯片初始化配置模块、FPGA和各个模块接口程序； 4进行了整个系统的联调，完成了视频图像数据存储并通过LCD显示；本文首先建立了系统架构，然后根据系统架构进行硬件平台的设计并对硬件平台进行分析和调试，最后编写个模块代码并完成系统联合调试实现系统要求。

Fuzzy logical method is applied to the risk assessment,and fuzzy logical method is improved based on the actual condition of the risk assessment of wireless network, Each risk factor is estimated in the aspect of the probability, the impact severity and uncontrollability.

通过应用熵权系数法，客观地计算出每个风险因素的权重，从而计算出整个无线网络系统的风险等级，以对整个系统进行评估。

NET latest 2.0 development technique, the database mean a layer adoption unify of external appearance mode, make thus the whole system structure clear in meaning, the source code self own very good performance of readability and writability, then better convenience to customer operation and development personnel next move of development work, the type of tree control and user-defined page technique of usage make the whole system person\'s machine hand over with each other the function be more outstanding.

NET最新2.0开发技术，数据库表示层采用统一的外观模式，从而使得整个系统架构明北方奔驰价格晰，源码可读可写性好，进而更好的方便了用户的操作及开发人员下一步的开发工作，树型控件和自定义分页技术的使用使得整个系统人机交互性能更为出色。

The paper investigates both block-type pilot linear minimum mean square error algorithm and IEEE802.16 OFDM channel estimation analysis. Simulation results confirm the block-type pilot structure is more suitable for IEEE802.16 system. An optimal pilot setting algorithm, based on space frequency domain, is explored and the pilot chart is presented. The proposed algorithm finds its application in MIMO-OFDM. Simulation results show the algorithm presents a good approximation to the perfect channel state information curve, with about 2dB difference in SNR. The simulation results also demonstrate the algorithm achieves fairly high stability in the environment of fast fading, performance of the proposed algorithm is better that of pilot training channel estimation.3. Taking into account the characteristics of IEEE802.16 OFDM system, OFDM system simulation platform is constructed in Matlab, exploiting simulink as a tool. OFDM modulation and demodulation simulation system are configured on LabVIEW platform. All the system signal processing is simulated, including defining system parameters, designing modulation model, and verifying all the proposed algorithms under different environments, such as white Gaussian noise, multi-path fading, with or without guard interval etc. Bit error performance is evaluated. The research provides valid theoretical basis for practical OFDM system performance evaluation.4. Taking advantage of software radio, the paper designs a hardware platform with both 256-IFFT/FFT and 512-IFFT/FFT OFDM schemes co-existing in one platform. You can predetermine one from the two schemes to carry out almost the same model function with different system performance and parameter setting.5. Referring to IEEE802.16 standard, the paper proposes a design method for generating signals and frames suitable for laboratory investigations implemented in laboratory environment.6. Based on 6701evm digital evaluation card, combined with analogy front-end, the paper designs a DSP software model to deal with baseband signal processing. An overall OFDM scheme, with modulation and demodulation function, is accomplished.

讨论分析了MIMO-OFDM中一种基于空频域的最优导频设置算法，给出了导频图案，通过仿真实验表明，该算法与理想的信道状态信息曲线非常接近，信噪比差距约在2dB左右，并且在快衰落条件下具有较好的稳定性，其性能要优于基于前导训练的信道估计方法。3、根据IEEE802.16OFDM系统特点，论文分别在Matlab中应用Simulink工具构建OFDM系统仿真平台、在LabVIEW平台上实现了OFDM调制解调仿真系统，模拟了整个系统的信号流程，进行了OFDM仿真系统参数的选择和调制模块的仿真设计、论证各算法性能，并根据各种不同的条件：例如高斯噪声、多径衰落、有无保护间隔等，对系统的误码特性进行了评估，为正确评价实际OFDM系统的性能提供了有效的理论依据。4、论文以软件无线电思想作为指导，提出了以256点IFFT／FFT为核心和以512点IFFT／FFT为核心的两种OFDM算法模式并存于同一个硬件平台、且可预选的方案，它们在参数选取和性能指标上有所差异，均实现了相似的模块和功能。5、论文参考IEEE 802.16无线网络标准的参数设置，针对本设计系统的应用环境和系统硬件的性能速率，提出了一种应用于实验室环境的信号结构、帧格式等参数设计。6、论文基于TI公司的6701evm数字评估板卡，结合模拟前端搭建数字中频平台，设计了基带处理的DSP软件模块并进行系统调试，基本实现了一套完整的OFDM调制解调方案。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。