These results are helpful for understanding the photorefr active dynamic of twm in ce : knsbn crystal and the influence of fanning to twm , and provides fundamental data for the applications of doped knsbn crystal in the fields of optical information processing and holographic storage 本文实验结果和理论分析为研究高增益光折变材料的光折变特性和在全息光存储和光学信息处理等领域的实际应用提供了基础性的实验依据。
As a low noise , broadband , high power and high gain microwave vacuum tubes , traveling wave tubes ( twts ) have been widely used in military radars , satellite communications and electronic confrontations , which play an important role in modern electronic equipments 行波管是一种低噪声、宽频带、高功率、高增益的微波器件,被广泛应用于军事雷达,卫星通信,电子对抗等领域,发挥着极其重要的作用。慢波结构是行波管的核心,决定着行波管的技术性能。
Erbium doped fiber amplifier ( edfa ) is a key component of optical communication . it can amplify all the signal in wdm system taking the places of an array of electronic regenerators , furthermore , it has advantages such as high gain , low noise and so on 掺铒的光纤放大器( edfa )是光通信中的重要元件，它可以对现有波分复用系统( wdm )中所有波长的光信号进行放大，从而代替了一组单波长放大器，而且edfa对光信号的放大具有高增益、低噪声等特点。
In inertial confinement fusion , a variety of fluid instabilities can destroy the symmetry and integrity of the capsule , and even fail the ignition . the understanding of the growth of perturbations is of extreme important for achieving the ignition and high gain 在惯性约束聚变内爆过程中存在各种流体不稳定性，它们能够破坏靶丸的对称性和完整性，使得点火失败，因此深入地理解收缩内爆过程中流体不稳定性的发展规律，对于实现点火与高增益聚变是至关重要的。
Ion detection technique has been successfully used in the study of rydberg states of na2 by pulse optical - optical double resonance . high - lying rydberg states near ionization limit have been observed and high sensitive and high gain spectra have been obtained . this technique is very useful for molecular spectroscopy 本文首次实现了钠分子体系中离子探测脉冲激光光谱，研究了钠分子电离限附近的高里德堡态，获得了高灵敏度和高增益的光谱，拓宽了分子光谱研究领域。
Traveling wave tube ( twt ) is a kind of broad - band , high powerh , high gain microwave millimeter wave amplifiers . they are widely used in communication , electronic warfare , rader system and microwave directional power weapon , taking an irreplaceable role in modern military electronic equipments and communication 行波管是一种高增益的宽带/毫米波功率放大器件,广泛应用于数据通讯、电子对抗、预警飞机、火控雷达、精密制导,在现代军事电子装备中显示出不可取代的重要作用,是国家重大专项的核心电子器件。
The result shows that the solar radiation pressure moments play a mainly part . based on kalman filtering , three kinds of attitude determination algorithms were studied using the attitude sensor now available on the explorer : the first based on digital solar sensor ( dss ) and gyroscope when the star sensor is not available ; another based on dss , high - gain antenna ( hga ) and gyroscope when the explorer is in the earth - safe mode ; the third based on star sensor combined with gyroscope when the explorer is in the normal mode 针对配置了典型测量敏感器的深空探测器,基于扩展kalman滤波给出了其姿态确定的方法:针对星敏感器不可用情形,给出了使用太阳敏感器和速率陀螺定姿的滤波器算法;针对安全模式下的对地稳定定向情形,给出了太阳敏感器和高增益天线融合速率陀螺信息的定姿算法;针对正常巡航模式给出星敏感器和速率陀螺联合定姿算法。
The directional routing protocol ds _ dsr put forward by the author is the improvement of the current protocol dsr , complete routine discovery and maintenance by directional neighbor nodes routing table , source routing and directional steering . the research discovers the application of the directional antenna , compare the omnidirectional antenna can increases the networks " total throughput , obviously reduces the co _ channel interference ( cci ) , multiple access interference ( mai ) , enlarges the nodes " signal and interference to noise ratio ( sinr ) , and because of the high gain of directional antenna can realize the communication with farther distance and less jump , end to end delay can decrease deeply , simultaneously , security of networks can be improved partially , the node energy also can be saved easily by power control 本文提出的定向路由协议ds _ dsr是基于对现有协议dsr的改进下实现的，通过定向邻节点路由表、定向源路由和定向搜索来完成路由发现与维护。研究发现，定向天线的应用，相比全向天线可明显提高网络的总的吞吐量，减少信道干扰、多址干扰，提高信干噪比，且由于定向天线的高增益可实现较远距离、较少跳数的通信，减少了路由发现时间，这样大大减小了传输时延，网络的整体性能得到了不同程度的提高，同时部分地解决安全问题，通过功率控制还可较容易的实现节能的目的。
The smart antenna , which is adapted in the wireless mobile communication system , in fact , forms an antenna with a high gain . thus communication in all directions can be proceeded , then base station antenna coverage , system capacity and service quality are improved , also inter - symbol interferes and multi - access interfere are reduced . the space division multiple access ( sdma ) is introduced , and users can be distinct from each other through their special location 在无线移动通信系统中采用智能天线技术，实际上是通过数字信号处理，使天线阵为每个用户自适应地进行波束赋形，相当于为每个用户形成了一个可跟踪它的高增益天线，从而即可以进行全方位通信，也可以用较小的发射功率覆盖相同的范围以及提高系统容量和业务质量、降低用户间的码间干扰和多址干扰。
Recently the first novel slag detection system developed in china has been completed in hangzhou steel company with successful results . it includes a detection instrument with high gain , strong anti - interference and a sensor working at about 1400 , and a computer monitor system to enhance its function as well 最近，中国自行研制的第一台新型的下渣检测系统在杭州钢铁公司开发成功，该系统由具有高增益、强抗干扰的检测仪器，工作在1400的传感器，以及计算机实时监控系统组成。
