春风化雨——走近许远明

许远明第十届全国人民代表大会代表、主席团成员,2004年度十大最受关注的企业家,中国兵器工业集团公司123厂厂长、党委书记,教授级高级政工师、高级经济师,享受国务院政府特殊津贴,全国五一劳动奖章获得者。8年前,123厂当年亏损1亿多元,累计亏损7.6亿元,负债5.2亿元,企业面临破产。此刻,许远明临危受命,走马上任,凭浩然正气,靠智慧胆量,力挽狂澜,过关斩将,扭转乾坤,展示了儒将风采,恰如:春风化雨。     

从王瑛的“铁骨柔情”说开去——三八妇女节有感

每年三八妇女节到来之时,我们总会情不自禁地想起一大串巾帼女杰:花木兰女扮男装,替父从军;刘胡兰面对顽敌的铡刀,面不改色,从容就义;红色娘子军为斗恶霸求翻身,转战椰林,所向无敌……她们不是男儿,胜过男儿,其志向坚定,其胸怀坦荡,其英勇顽强,其大义凛然,无不使人佩服、赞叹、崇敬。然而,在感叹之余,又觉得少了点什么——是否人们在赞美她们的"英雄气"时,忽略了她们的人情味、特别是女人味的一面呢?     

卧底,在最危险的地方

正这是一场战争,没有硝烟弥漫、子弹横飞,却险相环生、生死争锋。这里是战场,金三角近在咫尺,毒品渗入内地的"黄金通道"。他们,是一群特殊的军人和警察,在各个角落里出没,直面阴暗和危险,目标只有一个:肃清毒品。他们,有的卧底在最危险的缉毒前沿,有的身着橄榄绿,与毒贩周旋。在这里,没有人可以置身事外,在这里,每一刻都在战斗,战斗,一直并依然在继续——他们在家里,是温和的长者,隔壁家三岁的小儿子都可以"欺负"他,揪着他的头发骑大马。走出家门,他就是一匹狼,在面对每一个"猎物"时,冷静、沉着、果敢、迅捷,一击必中。     

心健尤为重

据《史记》载,古代名医扁鹊在论述人的疾病时,说有六类病不好治,即"骄横不讲理,轻身重财,衣食不当,阴阳混乱,内气不定,信巫不信医"。读罢此文,掩卷沉思,忽有所悟,这是对看病的高深见解,也是做人道理的精辟论述呀!     

当代中学生的心理特点及教育对策

当代中学生的心理具有多面性,是复杂的一代,总体来说,他们具有以下特点:第一,他们处于信息技术高速发展的今天,见多识广,有着强烈的求知欲和上进心,喜欢独立思考,有主见.第二,绝大多数的学生是独生子女,喜欢表现自我,进而形成了固执,以自我为中心的思维方式和行为习惯.第三,在应试教育的驱使下,过多的心理压力又使他们形成了封闭心理、逆反心理.第四,由于当代的中学生从小受到过多照料和宠爱,在确立学习目标的时候志向高远,而在进行的过程中,却时时动摇.这些情况给我们德育工作提出了更加复杂和更加严峻的挑战,德育工作要想有实效性,教育对策必须实现"三个转变".     

“葫芦兄弟”毕业记

6月,又是一年毕业季。曾经我们一同闻号而起,迎着朝阳读书,伴着夕阳训练,合着鼾声入眠。而今即将各奔天涯,或行走在北国边防线上,或穿梭在南国密林里,但无论时光怎样流转,那些共同经历的岁月不会忘记。离别之际,谨记此文,以作怀念。一个班,7个人。3个青年学员,4个士兵学员。3名来自北方,4名来自南方。上头小下头大,似葫芦,于是我们就以"葫芦兄弟"自居,乐在其中。班长"老马"——浓眉大眼稍含霸气,声音高亢略带沙哑,倘若是第一次见面,你一定以为我们班长马福州是一个严肃苛刻的角色。其实不然,他是一个充满"慈爱"的人。一次野外驻训,我不幸感冒发烧,浑身冷的厉害。见状,老马执意把他的大衣盖在我的身上。次日,我的高烧退了,但老马好像有些微恙,直打喷嚏。见我一脸歉意的样子,他一擤鼻涕,安慰道:"小事儿,     

话外音

正"五不"人生修炼:工作时,付出不亚于任何人的努力。处事时,不愤怒,不嫉妒,不轻浮,更不骄傲自恣。灾难时,不悲叹,不怨恨,不消沉,不灰心,不牢骚满腹;幸运时,不得意忘形,不失谦虚之心。萧条时,要有远见,要忍耐,不慌张。——张立文■借来的火点不亮自己的心灵。伟大的事业是一群痴迷于目标     

古老长白山里的新故事

第二年,阳春三月,人们惊讶地发现,在烈士墓旁,长出一株红艳艳,鲜嫩嫩,非常悦目,逗人喜爱的山花。这种花,开始只有一株,后来变为两株、三株……最后开得满山都是,把碧绿的山野都映成了红色的海洋,人们把它叫做映山红,又叫满山红。在古老神秘的长白山麓,流传着这样一个故事。1942年的冬天,30多名八路军战士与1000多个日本鬼子在这里展开一场血战,虽然敌我力量悬殊,但在连队党支部的坚强领导下,官兵团结一心同仇敌忾,最终在刺刀见红中将敌人悉数歼灭,我军将士也全部壮烈牺牲。就在     

聚散之道

春秋时期,范蠡戮力辅佐越王勾践,终于使得越国复兴。胜利后,越王封范蠡为上将军。可范蠡知道勾践为人可共患难不能共富贵,于是就辞书一封,放弃高官厚禄,只装少量珠宝,乘舟远行,一去不返,这可谓一聚一散。范蠡辞去上将军后,到了齐国,更名改姓,耕于海畔,没有几年就积累财产数十万。齐国人仰慕他的贤能,请他做宰相。后来范蠡感叹道:"居家则至千金,居官则至卿相,     

自觉维护军人的形象

人 民解放军官兵 ,在全国人民心目中的形象 ,是高大的 ,可谓光彩照人。这是一代又一代革命军人 ,以自己的行动 ,实践我军全心全意为人民服务宗旨的结果。现在 ,我军广大指战员 ,像革命前辈一样 ,以高度的政治责任感 ,维护军人的形象。如在社会生活中 ,遵纪守法 ,礼貌待人 ,助人为乐 ,见义勇为 ,行止端庄 ,着装整洁。这种自觉性是很可贵的。但是 ,随着市场经济的发展 ,社会生活更为复杂 ,军人如何维护自己的形象 ,出现了许多新问题。有些现象 ,看似光亮 ,实际上在一点一滴损害着军人的形象 ,一不小心 ,就会中人圈套。最近同一些干部战士交谈 …     

Natural convection effects on TNT solidification inside a shaped charge mold

High Explosive Anti-Tank (HEAT) warheads and ammunitions are frequently produced by explosive casting inside an axis-symmetric mold with an inverted conical geometry in the basis. In order to prevent manufacturing defects, the solidification process must be controlled. In this study, a dimensionless solidification model has been proposed to investigate the heat transfer considering the natural convection inside the liquid explosive and the numerical simulations were performed by using COMSOL Multiphysics and Modeling Software, employing trinitrotoluene (TNT) thermophysical properties. The effect of three different boundary conditions on the top of the mold have been evaluated: convection, adiabatic and isothermal. It has been observed that solidification process was faster for convection case and slower for isothermal case, while an intermediary total solidification time value was found for adiabatic case. Moreover, liquid explosive was completely surrounded by solid explosive during the solidification process for convection case and also for adiabatic case through the end of the process. Otherwise, it was not observed for isothermal case. The natural convection effects promoted a vortex inside the liquid explosive, accelerating the heat transfer process. It has been concluded that isothermal mold top boundary condition should be preferred to prevent manufacturing defects, avoiding high thermal stress.     

重型装备回收系统气囊缓冲特性研究

将气囊缓冲过程分解为绝热压缩和排气释能2个过程,从热力学和运动学方程出发,建立考虑降落伞阻力影响的缓冲气囊的解析分析模型。基于该模型,对立式气囊的缓冲特性进行研究。结果表明：降落伞阻力对缓冲性能有微小影响,在计算中可以忽略。在理论分析的基础上给出了系统质量与气囊初始体积比的最优值,探讨了排气口固定型与可控型气囊的缓冲特性及其应用优劣。     

两种典型油品油罐火灾扑救模拟试验研究

用一种由膨胀珍珠岩材料做成的直径分别为2.3cm、3.0cm和3.7cm球状隔热浮子,对两种油品油罐火灾进行扑救模拟试验。研究结果表明,对于低闪点油罐火灾的灭火效果差,而对于高闪点的油罐火灾,隔热浮子覆盖油液表面,能够减少上面高温火焰对油液面的传热,进一步减弱油液面的蒸发,灭火效果好。     

大口径火炮制退机内腔压力测试技术

从火炮反后座装置的特殊结构及测试技术两方面详细分析、总结了我国几种大口径火炮在内腔压力测试时出现不正常现象的原因,并从传感器的机械度、传感器的封装技术、传感器的绝热处理、传感器的频响和排气工装等几个方面改进内腔压力测试的技术工艺方法,并用改进后的方法对155-2型火炮的内腔压力进行了试验,结果表明其工艺方法可准确地测试出内腔压力曲线,从而解决了多年来火炮后座阻力测试技术中存在的关键问题。     

Ti含量对Ti-B4C-C体系自蔓延高温合成的影响

以14Ti+3B4C+5C为基础反应体系,通过热力学分析及静态燃烧合成实验研究了钛含量对该体系SHS反应的绝热温度、反应速度和产物致密度的影响.研究表明,Ti含量适当增加,能够使反应速度加快、产物致密度提高.当Ti过量16%(摩尔分数)时,体系的绝热温度仍高达3 193K,反应速度最快,产物的致密度也较高.     

光学波导中原子干涉的加速度测量

提出一种水平方向、光学波导中原子干涉的加速度测量方案。详细介绍了光路结构、原子团制备以及光学波导的绝热装载等。通过实验手段对测量方案进行验证,首先将~(87)Rb原子团冷却至50 nK的玻色爱因斯坦凝聚态,随后对超冷原子团施加布拉格光进行分束、合束,完成原子干涉过程。实验结果显示,所提干涉测量系统能够实现单轴加速度测量,对未来高精度多轴加速度测量系统的研制具有指导借鉴意义。     

Formation of adiabatic shearing band for high-strength Ti-5553 alloy: A dramatic thermoplastic microstructural evolution

By using split Hopkinson pressure bar, optical microscopy and electronic microscopy, we investigate the influence of initial microstructures on the adiabatic shear behavior of high-strength Ti–5Al–5V–5Mo–3Cr (Ti-5553) alloy with lamellar microstructure and bimodal microstructure. Lamellar alloy tends to form adiabatic shearing band (ASB) at low compression strain, while bimodal alloy is considerably ASB-resistant. Comparing with the initial microstructure of Ti-5553 alloy, we find that the microstructure of the ASB changes dramatically. Adiabatic shear of lamellar Ti-5553 alloy not only results in the formation of recrystallized β nano-grains within the ASB, but also leads to the chemical redistribution of the alloying elements such as Al, V, Cr and Mo. As a result, the alloying elements distribute evenly in the ASB. In contrast, the dramatic adiabatic shear of bimodal alloy might give rise to the complete lamination of the globular primary α grain and the equiaxial prior β grain, which is accompanied by the dynamic recrystallization of α lamellae and β lamellae. As a result, ASB of bimodal alloy is composed of α/β nano-multilayers. Chemical redistribution does not occur in ASB of bimodal alloy. Bimodal Ti-5553 alloy should be a promising candidate for high performance armors with high mass efficiency due to the processes high dynamic flow stress and excellent ASB-resistance.     

红外脉冲强光辐射源中电爆丝爆炸机理研究

利用电爆丝的一种红外脉冲强光辐射新技术,从理论和实验上研究了电爆丝的爆炸机理。用电爆丝绝热加热模型数值模拟了电爆丝在冲击大电流作用下的电爆炸特性,电爆丝根数对电爆炸特性的影响。实验结果与理论模拟相一致。     

Numerical simulation study on penetration performance of depleted Uranium (DU) alloy fragments

Due to its high strength, high density, high hardness and good penetration capabilities, Depleted ura-nium alloys have already shined in armor-piercing projectiles. There should also be a lot of room for improvement in the application of fragment killing elements. Therefore, regarding the performance of the depleted uranium alloy to penetrate the target plate, further investigation is needed to analyze its advantages and disadvantages compared to tungsten alloy. To study the difference in penetration per-formance between depleted uranium alloy and tungsten alloy fragments,firstly, a theoretical analysis of the adiabatic shear sensitivity of DU and tungsten alloys was given from the perspective of material constitutive model. Then, taking the cylindrical fragment penetration target as the research object, the penetration process and velocity characteristics of the steel target plates penetrated by DU alloy frag-ment and tungsten alloy fragment were compared and analyzed, by using finite element software ANSYS/LS-DYNA and Lagrange algorithm. Lastly, the influence of different postures when impacting target and different fragment shapes on the penetration results is carried out in the research. The results show that in the penetration process of the DU and tungsten alloy fragments, the self-sharpening properties of the DU alloy can make the fragment head sharper and the penetrating ability enhance. Under the same conditions, the penetration capability of cylindrical fragment impacting target in vertical posture is better than that in horizontal posture, and the penetration capability of the spherical fragment is slightly better than that of cylindrical fragment.     

Thermal hazard assessment of TKX-50-based melt-cast explosive

In the present study, thermal hazards of TNT and DNAN used as the molten binder in TKX-50-based melt-cast explosives were comparatively studied through accelerating rate calorimeter (ARC) and Cook-off experiments. Two kinds of ARC operation modes were performed to investigate the thermal safety performance under adiabatic conditions (HWS mode) and constant heating (CHR mode). The obtained results demonstrated that at both heating modes, DNAN/TKX-50 outperformed TNT/TKX-50 from the thermal safety point of view. However, the sensitivity to heat of the samples was reverse because of the different heating modes. In addition, the results of thermal hazard assessment obtained from the cook-off experiment complied with ARC analysis which indicated the molten binder TNT replaced by DNAN would reduce the hazard of the TKX-50 melt cast explosive. Furthermore, the results of cook-off experiments also showed that DNAN/TKX-50 outperformed TNT/TKX-50 from the aspect of thermal stability, which was consistent with the result of CHR mode because of the similar heating process.