As an important part of driverless vehicle platform，the environmental perception system is the basis and premise to realize as the path planning and decision control function. Based on the onboard computer，an infrared image moving object detection system in complex scenes is designed.The browser/server architecture is used in the detection system. After the client browser requests for services，the server applies the improved YOLOv2 algorithm to detect the infrared images transmitted by the onboard RapidIO high-speed bus in real time.the missed detection and error detection rates are effectively reduced by dimensional re-clustering and improved activation function.In order to make up for disadvantages of low contrast and weak texture features of infrared images，bilateral filtering image enhancement algorithm based on histogram equalization is proposed，which can effectively maintain the image contour details.The results show that the real-time detection accuracy of the improved YOLOv2 is increased by 4.1% compared with the original algrithm and the image preprocessing significantly improves the detection accuracy.

The thermal environment adaptability assessment of most military electronic equipment only refers to the data from high and low temperature alternating experiments carried out according to American military standard，and the fixed high and low temperature standards make the experimental temperature often deviate from reality，which can only qualitatively analyze its thermal environment adaptability and is difficult to be used as a reference basis for task decision-making and maintenance testing.In order to truly reproduce the state of the military electronic equipment in the thermal environment，SolidWorks mechanical design automation software is used to create a CAD model of MD type simulator computer switch input board (referred to as MIN board)，and convert its task state spectrum into an environmental temperature spectrum and electronic component thermal power consumption spectrum，which are the input parameters of Icepak simulation. In addition，with the help of Arrhenius model and the improved C-M equation，the actual failure data of key electronic components obtained from the optimal accelerated degradation tests and the temperature data of electronic components and circuit boards obtained from the simulation are used as the parameters to calculate the thermal degradation failure times of electronic components and the thermal fatigue life of solder joints. At the same time， the competitive failure mode is used to evaluate the predicted life and weak links of MIN board，and the lifetime data is used as a quantitative characterization of its thermal environment adaptability. The simulated results show that the thermal degradation of electronic components is the main influencing factor for the thermal failure of MIN board，and the thermal fatigue of solder joints is the secondary influencing factor. Its weak points are mainly programmable logic devices and three-state buffers，and the predicted lifetimes in the north，east and south regions are 10-11，8-9 and 5-6 years，espectively，which roughly coincides with the actual failure time.

A volume effect of industrial computed tomography(CT) imaging and a contrast method for density inspection are used to build an algebraic model for base separation inspection, which improves the base separation inspection method in theoretical and practical ways. The size information is qualitatively and quantitatively analyzed with high precision by the fluctuation of inspected CT values. The experimental results of base separation inspection show that the density contrast model is suitable for the inspection of 0.20~0.50 mm base separation, and the relative error is less than 3.5%.

Modeling and decladding corrections are adopted to research the edge effect of shell inthe quantitative inspection of charge density of medium and large caliber ammunition by industrial CT imaging. The accuracy of density comparison model can be improved. The test results show that the accuracy of decladding correction methodis better than that of modeling correction method for charge density inspection of ammunition. The proposed methods can be used for the inspection of local charge density by industrial CT imaging.

For micro-computerized tomography(CT), the imaging spatial resolution can be improved by increasing the projection magnification. While, for a certain size workpiece, the projection data is easily truncated with the increase of magnification, which results in imperfection of data and artifact and attenuation coefficient shift in CT image. One method was put forward for compensating the trun?cated projection. According to the proposed method, the workpiece were scanned twice separately un?der low magnification and high magnification. The projection was not truncated under low magnifica?tion and the Cl image with low spatial resolution was reconstructed. Then the CT image was magni?fied digitally and reprojected and the estimated value of the truncated projection matching the high magnification projection was obtained. In the end, the estimated value of the truncated projection was combined with the high magnification projection and the filter backprojection algorithm was executed,.to get the micro-CT image with locally enhanced spatial resolution. The feasibility of the method was validated by the simulation result and the practical experiment result.

In order to measure the aircraft model’s poses at the spin time in the wind tunnel experi?ment, a method was proposed based on computer vision. The method depends on a set of manmade signs, which are easily identified and have high correctness rate of matching between corresponding them. To compute the poses, the signs are symmetrical about axis of model body and have known po?sition. Unstability and influence of the signs on the computed results were analyzed and solved. The experimented and analyzed results show that the method has better stability and precision.

For assisting shipboard helicopter in landing safely, an assisted landing technology for ship-board helicopter was proposed based on computer vision. The contents of the technology include image segmentation for identilying the landmark from desk, extracting corner of landmark in image with Harris corner detecting implement, establishing the function between corner of landmark and its pro-jection point in image based on perspective projection principle, computing functional relation matrix with least square technique, and decomposing relation matrix to get relative position and orientation between shipboard helicopter and snip. The experiments with simulated data show that the relative po-sition and the attitude data for shipboard helicopter can be estimated by the approach in real-time, which remain high accuracy still under the interference of image testing error.

In order to analyse the reconstruction algorithm based on different scanning loci, the projec?tion data of corresponding scanning locus must be obtained in advance. By analytic geometry method and solving quadratic equation, a computer simulation algorithm oi digital projection under arbitrary scanning locus was proposed. The algorithm is based on the rules of attenuation of monochromatic X- rays. Through mathematical modeling and computer simulation, digital projections of ellipsoid, and cylinder in circular and helix scanning modes are exemplified respectively, which are proved to be cor-rect by FDK and PI-Iine reconstruction algorithms. The algorithm is very useful to analysing the re-construction method of different scanning modes.

Human motion target detection based on computer vision is a cutting edge research topic causing in?creasing attention in the field of computer vision research. Wavelet transform method was used to solve for the ambiguous edges in human motion imaging. The shadow ’ s negative effect to the image processing was removed. The edge’s extraction was successfully realized. So this is an effective method for the research of human motion analysis system.

This article focuses on the process of shaping the mixed rifle with a large spiral angle in the cannon, and proposes a cone-like cathode structure with asymmetric cuneiform working tooth. The degree of cone, length and the angle of the cuneiform working tooth were determined experimentally and those parameters were matched well. An expert system of ECM is then implemented. As a result, control of voltage and electric current can be respectively applied to the convex line of the rifle at exit and middle part of the tube. The on-line measurement and control of machining parameters can be performed simultaneously with the control of rotation and precession of the cathode as well. The manufacturing practice demonstrates that the cathode structure is appropriate and the control system is accurate.

In order to realize CT fast reconstruction on an ordinary PC, a fast reconstruction process us?ing look-up table and polar coordinate back-projection was presented. Fast back-projection is first executed with the look-up table in polar coordinates. Reconstruction of the image in Cartesian coordinates is then car?ried out when the look-up table is used again to realize the fast interpolation. Computer simulation proved that the method could speed up image reconstruction effectively and the quality ot the image was close to the result of conventional back projection (CBP). When the size of the image is not large, the process can well replace the conventional means.

Bullet mark comparison is one of the key techniques in the discovery of evidences in gun relat?ed cases. So far, the methoa in use domestically still resides in the personal experience of experts in their comparison among the candidate bullets under the comparison microscope. This process is tedious and low in efficiency and cannot suit the requirements of development. A new bullet mark computer image compar?ing system is proposed including its hardware structure, software function and key technology. Practice shows that the system overcomes the original problems, and is worthy of being popularized.

Based on the B-dot magnetic-probe measuring computer system, the three measuring mathe?matical modes for the distribution oi length and velocity of plasma armature arc in the railgun bore were es?tablished, and some conclusions deduced from the measuring mathematical mode were put forward. The di?agnostic computer system for measuring the distribution of length and velocity of plasma armature arc in the railgun bore was developed. Results of experimental study were given.

In order to execute non-destructive testing for shell-like objects, a new scanning method has been introduced. X-rays irradiate on the surface of the reconstructed object along an oblique direction, through special reconstruction algorithms, cross-sections of the object can be obtained slice by slice. In practical application, however, the projection data are polluted by some factors such as noise, motion er?rors, and so on. So it is difficult to analyze the reconstruction algorithm qualitatively. In this paper, a com?puter simulation algorithm of digital projections for typical objects based on the scanning method was pro?posed ,and the results of simulation were given.

An environmental imitation sealed cabin is suggested for use in zoonomy tests. Tests and con?trol means are taken into consideration for the temperature, humidity, pressure, oxygen concentration, C〇2 concentration, vibration and noise parameters. The multiple environment variables can be measured and controlled through the computer. Its regulation characteristics are steady and reliable.

Based on theory of multi-phase thermodynamics of gas, particle and droplet in mixture and turbulent combustion, fuel air explosive explosion was simulated. Histories of the explosion parameters of fuel air explosive were given and the mechanism of explosion was revealed.

The internal-combustion gasbag projector structure is one among the techniques with ex?tensive prospects for shrapnel dispersal. It involves the processes of propellant combustion, gasbag charging，and bullet dispersion. The paper presents a theoretical model of the firing process of disper?sal of submunitions，gives both the result of numerical simulation and that of experimental study.

A computer simulation model for the power performance at the stable and transient working conditions for tracKlayers has been developed. It consists of a power device submodel and a transmission submodel, and can demonstrate the maximum speed，driving force, driving resistance， climb angle and various travel processes of the vehicle, cumulation calculations have been carried out for a tracklayer vehicle. The calculated results accord well with the measured values. The simulation method can be used conveniently for the study of power performance of tracklayers.

Military needs for ultraviolet alarming and ultraviolet security communication appear as important demands for the development of ultraviolet sensing technology. In this paper，adopting the international atmospheric transmission simulation package LOWTRAN, atmospheric ultraviolet transmission under varying conditions of geographical locations，altitude，visibility，directions of light pathways and the transmission ranges are analyzed. Simulation results thus obtained can basically ex?plain some conclusions in current applications of UV sensing technology abroad, and are useful in guiding future research and development of UV sensing technology.

The expression of normalized pattern function of dielectric rod radiator is given. The ef?fect of antenna parameters on the beamwidth and side IoDe level is analyzed. With the aid of a comput-er, curves of beamwidth and side lobe versus the antenna parameters are plotted. This provides a the?oretical basis for the engineering design of fuze dielectric rod antennas.

In the course oi aata processing of multiple trajectory detection，it is necessary to search for every shell’s track. Before tne shell’s movement properties are completely grasped, a manual searching approach with the aid of a computer is needed. In this paper is discussed, such an approach by analyzing its necessity，and the operation sequence is described in detail.

After analyzing the resolution distribution in the CCD intersecting target- plane, resolution distribution research is performed by means of computer simulation. First, in order to calculate the resolution, formulas are derived corresponding respective?ly to the two-CCD system and three-CCD system. Then, the regularities of the resolu?tion distribution in the target-plane with a diameter of 3 meters are acquired correspond?ingly. As seen from the three-dimensional figures of the resolution distribution, it can be concluded that the measurement system with three CCDs not only increases the cap?ture efficiency of the object, but also improves the resolution distribution in the target- plane.

The key technique in a numerical simulation of the metal forming process is the mathematic representation of dies and dynamic forging geometry as well as the generation of meshes. In tnis paper, the non-uniform rational B-splines are used to rep?resent the dies and forging geometry which can represent the arcs on dies precisely. Fur?ther the adaptive meshes generated can be changed with errors and the curvature of dies. This will increase the precision of calculation and meet the precision forging pro?cess through computer simulation. The adaptive precision forming process through com?puter simulation is exemplified by the presision forming of flanges at middle temperature which proves the system as valid and reliable.

Under the condition of satisfying all of the functional aims of an opti?cal system，the economic tolerance theory of optical systems is adopted for the pur?pose to get economic benefit which can rationally relax the tolerances so that the e- conomic benefit of production will be enhanced. One of the key processes of utiliz?ing this theory in practical production is to efficiently solve the problems of optimiz?ing the tolerance. I ms paper discusses this problem in terms of the choice of the optimizing method，the structure of the punishing function and the non-liner modi?fication of the optimized result. At last the paper ends with a practical result.

Based on the theory suggested in " Multibody System Dynamics" by Huston and Liu, a set of dynamic computer program for gun structures is developed.By calculating a number of examples, the functions of the program have been verified, the relative errors of the numerical answer and analytical answer are found to be less than 1%.

The paper presents a non-linear theory of oscillation of tuned two-center escapement of the Krupp type under dynamic conditions. When programmed, the failure of clockwork mechanism under high speed rotation can be visualized with the aid of the computer. Through the simulation calculation with over a 100 variations of parameters, the elementary mechanism of the failure of clockwork mechanism and factors affecting it under high speed rotation are made clear.

In this paper，an electronic coordinate converter transforming cartesian coordinates into polar coordinates is introduced. The converter is characterized by applying open loop zero-detection and pulse-width modulation and by using analogue simulation for solving homogeneous second order differential equations. Experimentation shows that the coordinate converter is of high precision and reliability.

Fault tree analysis method (FTA) in system safety engineering is used in this paper to analyse the safety in industrial pdetonator roduc- tion lines. Construction of the fault tree for the production line and formation of the computer analysis program are introduced，and results of analysis on a portion of the production line are given. The analysis can only be tentative for it requires much work to collect the basic data.

Based on the mathematical modelling for a military vehicle as a 3-D dynamic system, this paper studies the statistic simulation of the system’s random exci-tation—resulting from double side tracked road-surface roughness, solves for the time series response from the system state equations, and gives out the results in probability statistics as well as those in functional evaluations.

Maximum tangential stress criterion, energy release rate criterion ? and minimum strain energy density factor criterion in fracture mechanics are made use of with the aid of a computer, in locating the dangerous point of machine elements under specific loads and the direction of propagation of fatigue crack in machine elements under repeated load. Thiough this the damage position and the dynamical process of the crack propagation of machine elements can be simulated with the computer by means of the finite element method (FEM). Practical examples which have been com?puted and displayed include the mechanical models of the cases of a centre-and edge- cracked plate In tension. Crack growth and process of propagation of bending fatigue crack in gear teeth and tenon teeth of a turbine wheel have been simulated. 丁he results are basicaly In coincidence with the actual damage situation. The computation and simulation of the damage process are meaningful In furnishing guidance toward the removal of trouble spots and toward a refined design of machine elements.

For the measurement of localization parameters in cone-beam computed tomography (CBCT), a simple standard round bar measurement tool was designed, and a fast localization method based on the bar was proposed. The method should capture four projection images of the round bar tool in four positions of the CBCT imaging region, and then by using the imaging features of the tool in the CBCT system, five localization parameters influencing the image quality of the slice would be found out fastly. The experimental results show that the method can obtain the localization parameters with sub-pixel precision in few minutes, and the image quality of the slice reconstructed by the parameters has been improved obviously.

This paper introduces a system for automatic measurement and control of temperature and moisture by the microcomputer. In the system,MCS-51 single chip computer serves as the intelligent device. It also states the working principles of the system,its hardware structure and software design.

矿井内煤粉尘散布于空气中或漏失的汽油散布于空气中,当它们各自达到适当的浓度时极易引起爆轰。上述这类危险现象早已为人们所认识,然而战争中根据上述现象的原理,采用爆炸方式将燃料抛散到空气中形成燃料-空气云雾,适时引爆产生爆轰波与冲击波摧毁和杀伤对方的轻型装备和有生力量。这是近廿年出现的一种强有力的新型武器。

分析了美国陆军弹道研究所、阿伯汀靶场,德国国防军91号试验站,加拿大国防研究中心及英国皇家装备发展和研究中心对B炸药、TNT、LX-14、压装的PBX及铸装的PBX和HMX/蜡95/5等炸药进行的发射安全性模拟试验和影响膛炸因素的研究结果;指出了设计发射安全性好的大口径炮弹装药的发展方向.

本文叙述了离子交换法制备高氨酸羟胺的工艺过程,对该物质作了相容性试验、物理化学性能测试、差热和热重试验、生成热和比热的测定.

系统研究了RDX粒度对撞击感度和摩擦感度的影响,实验测试的RDX平均粒径为1.5～124μm,并在此粒度范围内分为5个粒度等级.其中撞击感度用特性落高法表示,摩擦感度用特性正压力表示.结果表明:炸药的撞击感度、摩擦感度均随粒度的减小而降低.从理论上分析了炸药粒度变化对机械感度影响的机理.

通过正交实验，对溶剂蒸发法制备球形团聚硼颗粒的工艺参数进行优化，研究了固化温度和固化时间对球形团聚硼颗粒的形态、平均粒径大小及其分布的影响，用扫描电子显微镜观察了球形团聚硼粉的外观形态。结果表明，团聚硼粒子的形态圆整，粒径可控且分布均匀。最佳制备工艺条件为：搅伴速度70r/min，工艺温度20℃，硼粉与黏合剂的质量比为9∶1，固化温度70℃，固化时间7d