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Especially, the technology of Automatic Gain Control and signal processing are studied which are key factors working on the performance of the receiver. Based on analyzing the theory of automatic Gain Control, operational amplifiers 0P37 and logarithmic D/Aconverter AD7111A are used to design variable gain amplifiers which can be controlled numerally, A/D convector LTC1405 is Used to test the echo, Complex Programmable Logic device is used for controller, and an arithmetic is designed for automatic Gain Control which is simulated and analyzed in order to test its feasibility.

本文在分析自动增益控制AGC原理的基础上，采用集成运放OP37和数控增益衰减器AD7111A设计可数字控制的可变增益运放模块；采用高速A／D转换器LTC1405作为回波信号检测模块；采用复杂可编程逻辑器件CPLD作为核心控制模块，构成数字自动增益控制电路，并设计粗调和细调步进控制相结合的算法，对回波信号的增益进行精确而快速的调节控制，使回波信号振幅快速稳定在设计指标范围内，利于接收机后续信号处理电路对回波信号作进一步的处理。

Or more of current CEOs used to be company presidents; 20% or more of current COOs used to be vice-president of operations; and 20% or more of CFOs used to be financial controllers.

％或更多的CEO们目前使用的是公司总裁； 20 ％或更多的电流库斯曾是副总统的行动；和20 ％或更多的首席财务官必须使用财政控制器。

This paper used Elman neural network to establish the model of irrigation water use prediction, having four importing units and exporting units. The determination of concealed level neural single number used the cut-and-try method, ten units were used.

运用神经网络中Elman反馈型神经网络建立了灌溉用水量预测模型，模型输入层神经元数目为4，输出层神经元数目为1，隐含层神经元数目确定采用试验法，最终确定为10。

Because different cell lines may show various levels of susceptibility to adenovirus infection and virus production, non-selectively replicating wtAd5 was used to be a comparison with the tested conditionally replicating adenovirus CNHK500.ONYX-015, the first replication-competent adenovirus entered into clinical trials was also used to be a comparison. We used virus proliferation assay, cell viability assay and western blot to evaluate the proliferation and cytolysis selectivity of CNHK500. Results demonstrated that the CNHK500 virus proliferation multiples in breast cancer cell lines after 48 hours is similar to that of wtAd5, ONYX-015 virus proliferation ability is less than that of CNHK500 in cancer cells.

然后，通过与ONYX-015（E1B 55 KD a蛋白缺失的2型和5型嵌和型腺病毒，美国ONYX生化制药公司研制）、wtAd5进行对比，利用病毒增殖实验和细胞生长抑制实验，验证了CNHK500选择性增殖能力和肿瘤特异性杀伤作用；利用Western Blot检测CNHK500腺病毒E1A和E1B在乳腺癌细胞和正常成纤维细胞中的表达差异，揭示了腺病毒肿瘤靶向性的机制；利用携带绿色荧光蛋白的CNHK500-EGFP感染乳腺癌细胞株和正常成纤维细胞株，直观地观察其感染乳腺癌细胞的能力和在乳腺癌细胞中的增殖过程。

The solder removing device comprises the restoring chamber(37) used to store the liquid heating medium whose temperature is above the solder's melting point, the substrate conveying machine used to convey the defectively soldered substrate in and out the solder treating pond, and the brush(45) used to rub the surface of the defectively soldered substrate immerged in the heating medium in the solder treating pond and rub off the solders which are over heated by the heating medium.

焊料移除设备(31)包括用于存储温度高于焊料的熔点的液体形式的加热介质的修复腔室(37)、用于输送有缺陷地焊接的基片进出焊料处理池的基片运输机、和用于摩擦浸入焊料处理池内的加热介质的有缺陷地焊接的基片的表面由此擦去通过加热介质过度加热的焊料的刷子(45)。

There is a single solution included with this download, the solution contains a Win Forms project called "LinqToObjects"; this project contains two forms the main form (frmContactBook and a form used to display the total list of contacts, a serializable class called Contact (used to contain contact related data), and a class entitled, Serializer which contains two static methods used to serialize and deserialize the contact data (writing it to and reading it from a file).

有一个单一的解决方案，此下载包含的解决方案包含一个双赢窗体项目名为"LinqToObjects"，这个项目包含两种形式（主要形式和用于显示的联系人总清单，一表一序列化类的所谓联系方式，以及一个名为，其中包含用于串行序列化和反序列化的联系资料两个静态方法类（书面形式并从文件中读取它）。

Although your skin is had no aglow, smartly, if bottom of desquamate , take up, pink is not stuck,take those who wait for a circumstance to also explain you are used to protect skin to taste not quite moist, nurse so the method should be used centrally protect wet composition to protect skin high to taste, latex or breast of face of bubble recipe clean are used to be able to suit quite when clean face for example.

即使你的皮肤未有发红、刺痛，假如有脱皮、绷紧、粉底不贴服等情况也说明你使用的护肤品不够滋润，所以护理方法就应集中使用保湿成分高的护肤品，例如洁面时使用乳液或泡沫配方洁面乳会比较适合。

The main achievement is as following: Present a new software structure with insert mode based on diagram and data platform. With this structure the software can be used in various voltage levels of power networks by switching function groupware with corresponding edition. Therefore it is important to solve software universality and developability.(2) Present a new idea that any operating condition is combination of running mode of plant or station, power supply topological and rules of equipment maintenance. This idea is very useful at simplifying setup and choice of operating conditions and ensuring calculation result correction.(3) Present a new idea of protection setting examination and rectification. Protection setting examination is used to examine the selectivity、 sensitivity and speed under certain operating condition, and pass an opinion whether these settings are wrong;Setting rectification is used to calculate new relay settings when error is found in setting examination.(4) Point out that interaction design is the key step in developing power system application software,which can secure usability.

主要成果有：(1)提出了以图形/数据平台为基础的插件式软件结构，通过配置不同版本的功能插件即可应用于不同特点的电网，对解决软件的通用性和可发展性具有重要意义；(2)提出了基于厂站方式、供电方式和检修规律相组合的运行方式分解方法，它能有效提高运行方式选择的合理性与全面性，使定值计算的正确性得到保障；(3)提出了保护定值校正的思想并进行了软件实现，它能检测当前保护定值在选择性、灵敏性、快速性等方面是否适合当前的运行方式，并对不正确的定值进行纠正；(4)指出交互设计应作为电力系统应用软件开发中的一个关键步骤，目的是保证软件的可用性，并对软件开发的过程进行了总结，提出了许多有益的实践经验。

The scale 7, 10 and 13 are used to extract the feature vectors, which are used to train the artificial neural network. The trained neural network is used to classify semen cuscutaes and Japanese dodder seeds, which are collected from different places all over the country.

选择第7、10、13分解层数的特征向量，进行人工神经网络训练，再用训练出来的网络对不同产地的植物种子菟丝子和金灯藤所得FTIR小波提取的特征向量进行分类。

Under the basis of these, the lately widely used wavelet transform in DSP is used to wipe off the noise in the band of the signal frequency. Lastly, for its function of auto noise-resistance and double integral, the triple correlation is also used to improve the sensitivity of the receiver.

在此基础上，为了提高系统在低信噪比下的相关检测能力，采用了近来在信号处理中获得广泛应用的小波变换来去除信号频带内的噪声，并用三重相关对噪声的自动抑制作用和对信号的双重累积作用来提高接收机对回波信号的接收灵敏度。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。