当代军语快译通

舟艇位置分布图――在两栖作战的进攻阶段,每一舟艇中人员和器材所在位置的图解。boa t diagram-In the assaultphase of anamphibious operation,a diagram showing thepositionsofindividualsand equipment ineach boat.boat grou p-The basic organization olandingcraft.One boat group isorganized foreachbattalionlandingteam(or equivalent)to be landed inthefirstripoflandingcraftor amphibious vehicles.舟艇群――登陆艇的基本编队。每个营登陆队(或等同编制)配备一个舟艇群,用于登陆艇或水陆两栖车辆的第一波登陆。boattail…     

当代军语快译通

中心控制员――由两栖作战力量指挥员指派,负责舰到岸水面运输全面协调的军官,其工作地点在中心控制舰上。查问――部队或个人为了确定友军或敌军身份及其他事宜而采取的一些方法。暂停射击――在火炮、迫击炮和舰炮支援中下达的暂时停止开火的命令。化学战剂,毒剂―供军事行动使用的有毒化学制品。机密合同――承包商或其雇员须能接触机密资料的合同。cen tral control officer-The officerdesignated by the am phibious task forcecom m ander for the overall coordination of thew aterborne ship-to-shore m ovem ent.The centralcon…     

基于关键行动点的作战计划动态评估

作战进程的仿真是作战计划生成系统的重要组成部分,采用作战力量点抽象和简化作战实体的方法,基于关键行动点的思想对作战进程仿真建模,由离散、静态的作战行动点,向连续、动态的作战行动转化,通过计算各个阶段作战效能值,“以静制动”,实现对作战计划任意阶段的计算机仿真评估.     

信号时序逻辑约束下基于终点回溯的高效规划

在信号时序逻辑约束下规划路径是一项具有挑战性的任务,其计算量非常高.提出了一种终点回溯的规划方法,它是一种适用于连续时间系统的抽象化方法.该规划方法分为离线构建阶段和在线规划阶段.离线构建阶段在Transducer理论的指导下,从能够完成任务的合理的终点构造一棵快速随机搜索树,向初始状态空间进行回溯.当采样点足够多时,...     

基于串联QFD神经网络的武器装备使用需求映射方法

针对传统优化方法不能对武器装备使用主体――部队的使用需求进行有效考虑,提出武器装备使用需求到性能指标映射的串联QFD神经网络方法.该方法综合利用了QFD方法采集信息准确快速、神经网络能够精确模拟多变量输入输出强非线性关系的优点,提高了映射精度与针对性,克服了传统需求分析侧重于推理而轻实践、侧重于"设计方"而轻"使用方"的弊端,集中体现了"用户"为主的思想.改进了传统BP网络训练算法,给出了武器装备使用需求映射适应度函数.最后,结合实例对方法及算法进行了可靠性验证.     

金狮棉机助力兵团机采棉加工产业升级

邯郸金狮棉机有限公司创建于1951年,是中华全国供销合作总社直属企业――中国供销集团下属的中棉工业公司的子公司。公司历史悠久,是一家致力于专业棉花加工成套设备制造的大规模企业,被誉为"中国棉机的摇篮"。2011年年初,国家科技部批准依托中棉工业公司成立国家棉花加工工程技术研究中心,旨在针对我国棉花加工中存在的重大关键共性技术进行攻关,促     

金狮棉机助力兵团机采棉加工产业升级

邯郸金狮棉机有限公司创建于1951年,是中华全国供销合作总社直属企业――中国供销集团下属的中棉工业公司的子公司。公司历史悠久,是一家致力于专业棉花加工成套设备制造的大规模企业,被誉为"中国棉机的摇篮"。2011年年初,国家科技部批准依托中棉工业公司成立国家棉花加工工程技术研究中心,旨在针对我国棉花加工中存在的重大关键共性技术进行攻关,促进棉花加工技术进步和产业升级。邯郸金狮棉机有限公司是国     

strengthened so as to spur the postgraduate education to transform

ative expansion to qualitative improvement.Secondly,key construction plan of higher education,focusing on "hardware" as well as "software" construction,should be human-oriented.Thirdly,doctoral supervisors to instruct postgraduates should be encouraged.Fourthly,postgraduates should be encouraged to write dissertation in the light of their supervisors' research subjects.Fifthly,to eliminate the regional differences in postgra     

基于GRU-VAE的无监督航迹异常检测方法

针对海量无行为模式标签航迹数据的目标行为异常检测问题,提出一种基于门控循环单元的变分自编码器模型(Gate Recurrent Unit-Variational Autoencoder, GRU-VAE)无监督航迹异常检测方法。该方法通过检测航迹异常发现目标的行为异常,分为模型训练阶段和异常检测阶段两步实施：在模型训练阶段,构建了以GRU和VAE为主要结构元素的基于门控循环单元的变分自编码器模型,利用无异常信息标签的历史航迹数据对GRU-VAE模型进行训练,根据训练集的航迹点重构损失分布情况,采用正态分布法或百分位数法划定置信区间为航迹点重构损失门限;在异常检测阶段,该模型对实时航迹数据集进行检测,将重构损失超出航迹点重构损失门限的航迹点视为异常航迹点,当航迹序列中的异常航迹点占比超出占比阈值时,判定为异常航迹序列,结合数据异常情况向一线人员发送目标的异常行为信息。AIS数据实验结果表明,模型最高F₁分数达86.36%,查全率达95%。本方法对异常航迹的检测具有高灵敏度和低漏警率,可满足战场态势认知需求。     

Cold Flow Experiments and Acoustic Investigation on Pressure Oscillation Induced by Flow Instability

Pressure oscillation in solid rocket motor is believed to be the results of the interaction between the flow instability and the acoustics of combustion chamber.Several reasonable and necessary hypothesizes are given to establish an equation to describe this coupling.A cold flow motor called CVS60D(corner vortex shedding 60°)was designed to study the flow-acoustic coupling based on theoretical analysis.Experimental investigations were carried out to determine the acoustics of CVS60D.Corner vortex shedding is generated at the backward facing step which is designed similar to the geometry of the motor with finocyl propellant after the burnout of its fins.A pintle was used to modify the velocity in the duct to change the frequency of vortex shedding.It is found that large amplitude pressure oscillation occurs when the pintle moves to a range of specific position,which indicates that the frequency of vortex shedding is close to one order of acoustic modes of combustion chamber.The amplitude of pressure oscillation changes as the pintle moves.     

当代军语快译通(2)

access to classified information - Theability and opportunity to obtain knowledge of classified information. Persons have access to classified information if they are permitted to gain knowledge of the information or if they are in a place where they would be expected to gain such knowledge. Persons do not have access to classified information by being in a place where classified information is kept if security measures prevent them from gaining knowledge of the information.     

电子对抗指挥效能评估中的模糊层次法

为了更加科学合理地评估电子对抗指挥效能,在模糊综合评判法和层次分析法的基础上,提出了一种新的评估方法――模糊层次法,即先用层次分析法计算各因素的影响程度,然后利用模糊综合评判法来对电子对抗指挥效能综合进行评估。这种方法既解决了电子对抗指挥效能指标权值取值的科学合理性问题,又能有效地对影响电子对抗指挥效能的一些因素具有难以预测的随机性进行合理处理,从而使电子对抗指挥效能的评估具有更高的可信度。     

Experimental and numerical analysis on suitability of S-Glass-Carbon fiber reinforced polymer composites for submarine hull

Suitability of S-Glass/carbon fiber reinforced polymer composite for submarine hull subjected to hydrostatic pressure has been investigated in the present study. Metallic materials have raised concerns owing to their decomposition due to low resistance towards salinity and hence polymer composites have been explored to showcase their mechanical stability to withstand transverse and impact loads. To this end, the mechanical properties of S-Glass/carbon fiber reinforced polymer composite were expe...     

Blast resistance of air-backed RC slab against underwater contact explosion

Reinforced concrete(RC) structures are common in engineering, and usually exposed to air or water, may be subjected to various blast scenarios. This paper aims to investigate the blast resistance of an airbacked RC slab against underwater contact explosions(UWCEs). A detailed numerical model based on CLE method considering explosive, water, air, and RC slab is developed to examine the structural behavior of the air-backed RC slab due to UWCEs. At first, the reliability of the numerical method is...     

Optimization of friction stir welding parameters for improved corrosion resistance of AA2219 aluminum alloy joints

The aluminium alloy AA2219(Al—Cu—Mg alloy) is widely used in the fabrication of lightweight structures with high strength-to-weight ratio and good corrosion resistance.Welding is main fabrication method of AA2219 alloy for manufacturing various engineering components.Friction stir welding(FSW) is a recently developed solid state welding process to overcome the problems encountered in fusion welding.This process uses a non-consumable tool to generate frictional heat on the abutting surfaces.The welding parameters,such as tool pin profile,rotational speed,welding speed and axial force,play major role in determining the microstructure and corrosion resistance of welded joint.The main objective of this work is to develop a mathematical model to predict the corrosion resistance of friction stir welded AA2219 aluminium alloy by incorporating FSW process parameters.In this work a central composite design with four factors and five levels has been used to minimize the experimental conditions.Dynamic polarization testing was carried out to determine critical pitting potential in millivolt,which is a criteria for measuring corrosion resistance and the data was used in model.Further the response surface method(RSM) was used to develop the model.The developed mathematical model was optimized using the simulated annealing algorithm optimizing technique to maximize the corrosion resistance of the friction stir welded AA2219 aluminium alloy joints.     

基于免疫遗传算法的无人机航路规划

基于免疫遗传算法的原理,建立了一种在三维复杂地形下,协同考虑地面等待和任务执行两阶段的无人机航路规划模型.首先,使用了生成三维等效地形图的方法;其次,根据所得的地形图,提出了一种改进的分组寻优免疫遗传算法用于搜索最优航路,提高了搜索效率.该算法先用预处理解空间和免疫记忆特性的方法来产生初始解群体,再用免疫遗传算法的特性搜索满足无人机机动特性约束的航路点集,最后使用准均匀B样条曲线,将航路点连接起来的有向线段进行修改、光顺,使航路安全可飞.仿真的结果证明采用的模型是合理有效的.     

闹“贼”

军事演习总指挥部通知:下午4点放假,明晚6点收假,后天进入决战阶段。飞行员王大力一听到消息,就飞快地向电话亭跑去。因为演习期间,只有放假时所有的公用电话和手机才能开通。真怪!王大力给母亲打电话总是占线,打爱人的手机也总是     

UAVs cooperative task assignment and trajectory optimization with safety and time constraints

This paper proposes new methods and strategies for Multi-UAVs cooperative attacks with safety and time constraints in a complex environment. Delaunay triangle is designed to construct a map of the complex flight environment for aerial vehicles. Delaunay-Map, Safe Flight Corridor(SFC), and Relative Safe Flight Corridor(RSFC) are applied to ensure each UAV flight trajectory’s safety. By using such techniques, it is possible to avoid the collision with obstacles and collision between UAVs. Bezier-c...     

Drop weight impact analysis of GFRP tubes with hollow glass particle-filled matrix

Protecting occupants or payloads in crashes and blasts is of utmost importance in both moving and immobile structures. One way of achieving this is by using a sacrificial energy absorber. Composite tubes have been studied as potential energy absorbers due to their ability to fail progressively under axial compression. In this study, the energy absorption capability of these tubes is enhanced by adding hollow glass particles to the matrix. Drop-weight tests are performed on composite tubes, and a...     

Preliminary Exploration in the Skill of Gaining Attention at the Beginning of AnEnglish Lesson

Gaining attention, as one of the skills of introductory procedures,has long been considered to be important.However, why this is so has seldom been made clear. What does a teacher do to attract students‘ attraction?