基于公理设计理论的某自行炮弹仓结构分析

公理设计在设计过程中提供一种描述设计目标的框架,设计者以这一框架作向导进行产品设计,使设计过程形式化,设计决策易于理解,并对设计的预期质量进行评价;应用公理设计方法对某自行炮全自动弹仓结构进行了分析,并提出了一种基于公理设计理论的某自行炮弹仓部件设计顺序。     

基于TCP协议的远程控制系统网络时延仿真研究

为了能够在同一网络环境下对远程控制系统进行研究,使用结构数组对网络时延进行了仿真。将数据报的信息存放在与其网络时延相对应的结构数组元素中,在每个采样点系统只使用结构数组相应元素中的信息,实现对网络时延的仿真。在基于时间驱动工作方式的控制系统中,可以采用这样的方法进行网络时延仿真。     

毛泽东偏离正确处理人民内部矛盾理论原因新探

关于毛泽东偏离正确处理人民内部矛盾理论的原因 ,过去论者多从社会历史方面去寻找。笔者认为 ,造成这种状况的主要原因 ,不但在理论之外 ,更在理论本身。由于缺乏主要矛盾的支撑 ,由于对社会主要矛盾的判断脱离实际 ,由于在处理人民内部矛盾的方法上沿袭老经验 ,由于对经济领域的矛盾缺乏必要的重视 ,最终导致毛泽东在实践中偏离了自己提出的这一在科学社会主义发展史上具有里程碑意义的理论。     

星载双基地SAR系统模糊性

针对星载双基地SAR由双基地几何关系引入的新问题,提出了计算其模糊比的新方法和近似分解方法。利用此方法通过仿真计算对星载双基地SAR模糊性变化规律做了进一步研究。结果表明,因接收天线的面积限制,与其伴随飞行的大卫星SAR相比,模糊性问题更为严重,但变化规律基本一致。比较而言,由于小卫星天线尺寸在高度上更接近大卫星天线,在距离模糊比上相对大卫星SAR抬高得不多,而在方位模糊比上抬高较大。     

指挥机构人员等级结构评估方法

指挥机构是战争中的头脑,结构优化、职责分明、衔接紧密是指挥机构首要的要求.为了使指挥机构在等级调整中仍然保持相对的稳定,确定合适的进入机构系统的人员比例,是需要解决的问题.依据机构人员级别调整运行的普遍规律,对进出机构系统的人员等级结构进行建模,分析机构人员等级结构达到稳定的条件,运用递推的方法,求得在稳定的条件下应调入机构的各个等级人员比例,并按达到稳定结构的顺序对机构进行评估.     

弘扬伟大建党精神奋进世界一流征程

以“坚持真理、坚守理想,践行初心、担当使命,不怕牺牲、英勇斗争,对党忠诚、不负人民”为内涵的伟大建党精神,是中国共产党的精神之源。这一精神内涵丰富、意境深远,具有鲜明的理论特征和时代价值,不仅指导了过去一百年中国共产党人带领全中国人民推进革命、建设、改革的伟大实践,更是对中华民族实现第二个百年奋斗目标具有深远的指导意义。只有深刻认识和把握伟大建党精神的科学内涵,才能战胜前进道路上的一切艰难险阻,继续谦虚谨慎、戒骄戒躁,继续艰苦奋斗、锐意进取,锲而不舍把建设世界一流军队的伟大事业推向新征程。     

Electronic warfare in the optical band: Main features,examples and selected measurement data

The paper presents the possibilities of, and methods for, acquiring, analysing and processing optical signals in order to recognise, identify and counteract threats on the contemporary battleground. The main ways electronic warfare is waged in the optical band of the electromagnetic wave spectrum have been formulated, including the acquisition of optical emitter signatures, as well as ultraviolet (UV) and thermal (IR) signatures. The physical parameters and values describing the emission of laser radiation are discussed, including their importance in terms of creating optical signatures. Moreover, it has been shown that in the transformation of optical signals into signatures, only their spectral and temporal parameters can be applied. This was confirmed in experimental part of the paper, which includes our own measurements of spectral and temporal emission characteristics for three types of binocular laser rangefinders. It has been further shown that through simple registration and quick analysis involving comparison of emission time parameters in the case of UV signatures in “solar-blind” band, various events can be identified quickly and faultlessly. The same is true for IR signatures, where the amplitudes of the recorded signal for several wavelengths are compared. This was confirmed experimentally for UV signatures by registering and then analyzing signals from several events during military exercises at a training ground, namely Rocket Propelled Grenade (RPG) launches and explosions after hitting targets, trinitrotoluene (TNT) explosions, firing armour-piercing, fin-stabilised, discarding sabots (APFSDS) or high explosive (HE) projectiles. The final section describes a proposed model database of emitters, created as a result of analysing and transforming the recorded signals into optical signatures.     

Research on the influences of confining pressure and strain rate on NEPE propellant: Experimental assessment and constitutive model

In order to study the influences of confining pressure and strain rate on the mechanical properties of the Nitrate Ester Plasticized Polyether (NEPE) propellant, uniaxial tensile tests were conducted using the self-made confining pressure system and material testing machine. The stress-strain responses of the NEPE propellant under different confining pressure conditions and strain rates were obtained and analyzed. The results show that confining pressure and strain rate have a remarkably influence on the mechanical responses of the NEPE propellant. As confining pressure increases (from 0 to 5.4 MPa), the maximum tensile stress and ultimate strain increase gradually. With the coupled effects of confining pressure and strain rate, the value of the maximum tensile stress and ultimate strain at 5.4 MPa and 0.0667 s⁻¹ is 2.03 times and 2.19 times of their values under 0 MPa and 0.00333 s⁻¹, respectively. Afterwards, the influence mechanism of confining pressure on the NEPE propellant was analyzed. Finally, based on the viscoelastic theory and continuous damage theory, a nonlinear constitutive model considering confining pressure and strain rate was developed. The damage was considered to be rate-dependent and pressure-dependent. The constitutive model was validated by comparing experimental data with predictions of the constitutive model. The whole maximum stress errors of the model predictions are lower than 4% and the corresponding strain errors are lower than 7%. The results show that confining pressure can suppress the damage initiation and evolution of the NEPE propellant and the nonlinear constitutive model can describe the mechanical responses of the NEPE propellant under various confining pressure conditions and strain rates. This research can lay a theoretical foundation for analyzing the structural integrity of propellant grain accurately under working pressure loading.     

Influence of a liquid-filled compartment structure on the incoming shaped charge jet stability

Liquid-filled compartment structure consists of a bulk steel plate with matrix blind holes which are filled with liquid and a steel front plate to seal up the liquid with rings and bolts.The liquid-filled compart-ment structure can resist the shaped charge warhead effectively.This paper presents experimental and theoretical investigations of the penetration ability of the residual shaped charge jet emerging from the liquid-filled compartment structure after the penetration process at different impact angles.On the basis of shock wave propagation theory,the influence of the liquid-filled compartment structure on jet sta-bility is analysed.The interferences of the liquid backflow caused by a reflected shock wave and a back plate on jet stability under different impact angles are also examined.In addition,the range of the disturbed velocity segments of the jet at different impact angles and the penetration ability of the re-sidual jet are obtained.A theoretical model is validated against the experimental penetration depths.     

统编版初中语文名著导读的教学现状及策略探究

名著导读是语文教材中的一个重要板块,是中学师生不得不面对的教学环节,在名著导读教学实践中,教师如何引导、学生怎样阅读的问题一直备受研究者关注,关于名著导读教学的研究著作颇丰。笔者通过问卷调查法,对S市某中学的名著导读教学现状进行分析,进一步探讨名著导读教学中存在的问题,并在此基础上对名著导读教学提出相应的策略。进而使教师导之有效,学生读而有得,使名著导读教学不仅引起师生的重视,更能在教学中得到落实。