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A design and implementation method of the high speed modulation system, which adopted the new techniques of the FPGA and DAC based communication system,is presented in this paper. The effect of the key techniques of this system, such as the high speed digital signal processing for modulation, high speed based-band signal conversion, wide-band modulation, carrier suppression, high frequency and high precision system clock generation, is analyzed, and the solutions and performance analysis is also given. Finally, a high speed modulation system for space applications is implemented, can be used for high speed data transmission with QPSK, 8PSK, QAM or other kinds of digital modulation.

本论文依据正交调制原理，采用基于FPGA和DAC的设计技术，提出了一种高速、灵活的调制系统的设计方法，重点分析了系统组成的调制编码映射、基带脉冲信号转换、信号滤波、调制、系统时钟产生等关键技术环节的影响，解决了高速调制信号处理、高速数据转换、宽带调制、载波抑制、高频率高精度系统时钟的产生等关键技术问题，完成了一种适用于空间应用的高传输速率、多进制数字调制方式和调制体制灵活的数据传输调制系统的设计与实现，可在硬件设计不变的情况下，实现QPSK、8PSK和16QAM等多种调制方式的高速数据传输，QPSK调制速率达到500Mbps。

This paper mainly studies the sizing techniques and mechanism of self-fixed neutral sizing agent WSF- I when used in the bleached baggase pulp0 The combination of crossing design and uniformity design scanning electron microscope observation and organic dissolvent Extraction were used to optimize and analyze in this research. Including three aspects:(1)to search for the optimal sizing techniques;(2)to analyze the factors affecting the sizing;(3)simply studies the sizing mechanism.

本文主要采用正交设计和均匀设计的试验方法、并结合电子显微镜观察和有机溶剂抽提等分析手段对自定型中性施胶剂WSF-I在漂白蔗渣浆施胶中的施胶工艺和施胶机理进行了研究，研究内容主要有三个方面：①最佳施胶工艺的探索；②影响纸页施胶度的因素的分析；③施胶机理的初步研究。

Microwave imaging techniques which can provide all-weather, day-and-night imag-ing capability have important applications to many scientific fields. It is an active area to ex-plore new microwave imaging ideas, systems and techniques. In this paper, a new microwave imaging method for earth observation is proposed.

摘要以微波为探测手段进行对地成像观测，能够全天候、全天时工作，在许多技术领域得到了重要应用，对微波成像的新思想、新体制、新技术的探索，也是一个非常活跃的研究领域。

It also discusses the techniques of programming with Motif/OpenGL on the basis of Unix/X Windows on graphic station. With the help of computer graphic techniques, it puts forward an effective way to simulate the three-dimension scene systems around aerodromes as well as the dynamic processes of f...

在此基础上，研究了在图形工作站上基于Unix/X Window系统利用Motif/OpenGL编程的基本技术，并采用计算机图像生成技术较好地模拟了机场周围的三维视景系统，有效逼真地表现了飞机运动的动态行为过程，初步完成了塔台管制模拟器的基本功能。

All these "techniques" we are talking about are not in fact techniques at all; rather, they are observations of how alphas behave, so that those who are learning them can better understand the goal which they are trying to achieve, within themselves.

我们说的所有这些&技巧&实际上并不是技巧，而只是对上等男人行为的观察，学习他们，更好地了解他们要达到的目标。

Different from other dramas, this one was shot in Australia, giving the viewers many beautiful new locations to look at. As it introduces a new kind of occupation, called an aquarist, it uses many different kinds of underwater filming techniques. These new techniques use a HD camera, which captivates the viewers with great pictures.

本剧的风格与以往的作品有所不同﹐它在澳洲拍摄的场景向观众提供了许多新颖华丽的看点﹐同时﹐以水族馆训练师为素材而进行的各种水中拍摄也倍受关注﹐HD摄像所带来的高清视觉效果也将让您大饱眼福。

In order to develop a new path for gene mapping of fish, the digoxigenin and tritium labeled in situ hybridization techniques combined with multiple banding analysis on the pachytene bivalents of M. albus were studied using the wheat ribosomal RNA genes, pig growth hormone gene and MaSoxl (M. albus SRY boxl) DNA segment as the probes. Moreover, the techniques of random primed in situ DNA synthesis were also developed on the bivalents of M.

以两种异源基因和Ma Soxl为探针，采用地高辛或氟标记的原位杂交技术，结合点渍法和DNA印渍法分析，率先在黄鳝减数分裂二价体上开展基因定位研究，并与多重带带型分析相结合，以期为构建黄鳝染色体框架图奠定初步基础，为迅速改变鱼类基因定位研究的落后局面而开辟新的途径。

Allen was a researcher at the Department of Neurobiology, The Babraham Institute, Cambridge, UK. Dr. Allen's research skills and techniques include DNA/RNA manipulation and purification/isolation, electrophoreses, PCR, cloning, all blottings, library screening, genetic mapping, design and construction of transgenes, artificial chromosome engineering, design and construction of vectors for gene targeting in ES cells, cell culture, histological techniques, mouse behavioural analysis, small animal surgery, and bioinformatic tools such as sequence databases and analysis tools.

从1996年到 2004年，Dr。 Allen 一直在英国剑桥Babraham 研究所神经生物学部门从事研究工作，包括DNA/RNA操纵、提纯/分离、电泳、PCR、克隆、印迹工作、文库筛选、遗传图绘制、转基因设计与构建、人工染色体工程、用于ES细胞基因打靶的载体设计与构建、细胞培养、切片技术、小鼠行为分析、小动物外科手术以及序列数据库和分析工具等生物信息工具的研究。

This project conducted the artificial simulated natural environment, scientific and reasonable feeding standards , and mature breeding techniques for captive great bustards. These techniques and experiences can be use in the northern China to raise and breed the great bustards in captivity.

该研究采取了人工模拟自然生态环境，科学合理的制定了饲养标准，形成了大鸨人工驯养繁育的成熟技术，为北方地区的人工饲养条件下大鸨大规模驯养繁殖提供了可借鉴和推广的技术指标。

Because the techniques of the biochemical waste treatment are very important, the techniques of the cultivation of the microorganism have received more attention in recent years. A study is conducted to analyze the steady states and dynamic bechavior of the reactions of the cell-substrate and the prey-predator interaction in two chemostats in series. For the reaction of cell-substrate in two chemostats in series, if the specific growth rate of the Monod model is used for the cell , there are three types of steady states for this reaction system. These three types of steady states and stability are analyzed in detail. The dynamic behavior of this reaction system is analyzed by the numerical method and computer graphs. The results show that the dynamic behavior of this system consists of stable steady states.

由於生物废弃物的处理技术相当重要，故最近几年来微生物的混合培养技术深受大家的重视，本研究实施菌类－基质(Cell-Substrate)和被捕食者－捕食者(Prey-Predator)相互作用之生化反应在两个生化反应槽串联之稳定状态和动态分析，对於菌类－基质之生化反应，若以Monod模式来表示菌类之比生长速率，则此两个生化反应槽串联之反应系统共有三种型态之稳定状态，本研究对此三种型态之稳定状态和稳定度作深入的分析，对於此反应系统之动态行为，则由电脑运用数值分析的方法及电脑绘图进行分析工作，动态分析的结果显示此生化反应系统之动态行为，以稳定之稳态为主。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。