Based on the digital simulation and model analysis , the anomaly characterization of apparent resistivity section obtained by the sounding at different positions , and the relationship between electrode space and exploration depth were summarized 根据理论模型的数值模拟结果，总结了地质异常体在不同观测方位巷道电测深视电阻率断面图上的异常特征及电极距与探测距离间的关系。
The single observer passive location and tracking system ( soplat ) , which uses electromagnetic wave emitted by target , has proved its merits of self - hiding and far - distance detecting in modern electronic warfare and information warfar 在现代电子战、信息战环境中,由于利用目标辐射电磁信息的单站无源探测定位系统具有机动性强、自身隐蔽和探测距离远等优点,因此它具有重要的应用价值。
Atmospheric attenuation of scene contrast is studied theoretically on the basis of radiometric principles , and the relationships between the measured maximal detection range for a target and visibility distance under two possible conditions are obtained 根据辐射度学原理，从理论上研究景物对比度在大气传输中的衰减，得到了在两种可能的条件下所测得的目标最大探测距离与能见距离的关系。
Abstract : cruise missiles have the characteristics of concealment and unexpectedness , so effectively detecting cruise missiles is the crux of cruise missiles defence . in order to increase detecting distance and discovery probability for cruise missiles , we ought to synthetically utilize various measures to make up the all directions target detecting and information communicating system with emphasis , which combines air with ground , far with near , advanced measures with traditional measures 文摘:巡航导弹具有隐蔽和突然的特点，对巡航导弹进行有效的探测，是抗击巡航导弹的关键，综合利用各种手段，组成空中与地面相结合、远方和近方相结合，先进手段与传统手段相结合的全方位、有重点的目标探测与报知体系，可增大对巡航导弹的探测距离，提高发现概率。
Active detection systems , such as radar and sonar , have encountered more and more threaten in modern electronic warfare and information warfare . passive location and tracking system , which uses electromagnetic wave emitted by target , has been proved its merits of self - hiding and far - distance detecting and becomes more and more important 现代电子战和信息战条件下,雷达和声纳等有源探测系统受到越来越多的威胁,利用目标辐射电磁信息的无源定位系统由于其自身隐蔽和探测距离远等优点而日显重要。
The passive location and tracking system , which uses electromagnetic wave emitted by target , has proved its merits of self - hiding and far - distance detecting in modern electronic warfare ( ew ) and information warfare . and it is now the hotspot in the field of non - linear tracking and estimation 在现代电子战、信息战环境中，由于利用目标辐射电磁信息的无源探测定位系统具有自身隐蔽和探测距离远等优点，因此它具有重要的应用价值，并已成为当今非线性跟踪与估计研究领域的热点问题。
Under our task experimental condition , we calculated the sensitivity of our planning to develop dial system with direct detection , besides , we studied the relationship between the sensitivity of measurement and atmospheric refractive - index structure constant and applied matlab program simulated the system parameters such as beam diameter , laser divergence angle , detection distance and gained relevant relationship curves 在课题实验条件下，模拟计算了直接检测dial系统的测量灵敏度。在考虑大气折射率结构常数对系统测量灵敏度影响的基础上，并对各种系统参数如光束半径、束散角和探测距离对测量灵敏度的影响运用matlab程序做了仿真计算，为合理选择系统设计参数提供了依据。
With the increasing requirements for detecting distance , photoelectric module , including light source and modulation , can be put under water to reduce the loss of light power in the optical fiber transmission and transmit the detected signal to the signal processing workstation on the shore . optical transceivers must be applied to realize the low - rate optical communication between the workstation on the shore and the long - distance photoelectric modules under water 随着光纤水听器阵列技术的发展,可将光源与调制部分作为远程光电模块置于水下,减少光纤传输过程中光波信号的损耗,而直接将光纤的探测信号传回岸基工作站进行处理,以增加光纤水听器的探测距离。
Firstly , the characteristics of radiation propagation and attenuation in the atmosphere , and the power response of a contrast - limited optoelectic system are analyzed , the apparent contrast model of a target is developed , and the detection range equation dependent on the aerosol extinction coefficient and range parameter are derived 首先，分析了红外波段大气辐射传输与衰减、对比度限制光电成像系统功率响应特性，建立了目标表现观对比度模型，并推导出了由气溶胶消光系数和距离参量确定的探测距离方程。
The use of interferometer to detect and analyze laser radiation is well known , but when the intense ratio of the laser radiation to the background natural light radiation is too small , the laser radiation cannot be detected . a novel more sensitive method for detect of wideband weak incident laser in strong background noise is introduced in this paper . the optical unit uses two wedge interferometers and two line array detectors . the incoming light radiation is divided into two beams and through the interferometers 在被动激光侦察告警中，对微弱脉冲激光信号的探测是一个难点。当探测距离相当远或视场内接收的背景光辐射很强时，脉冲激光信号到达探测器的能量很小，会淹没在强大的背景光信号中而探测不到。本论文提出了一种探测微弱脉冲激光信号的方法，可对强烈背景光中的激光威胁信号进行探测和告警，并给出其波长参数。
