废旧增雨弹销毁设计与施工

在废旧增雨弹销毁中,为安全、可靠、彻底的完成销毁工作,排除安全隐患。首先对销毁产品进行逐个鉴别,判断其物理化学性质;然后根据销毁安全技术要求结合实际情况选择合适的销毁方法与销毁场地;再根据销毁要求和安全措施对销毁弹坑、炸药单耗、销毁用药量、引爆方式等销毁方案技术参数进行精心设计;最后通过采取相应安全防范措施和确定警戒范围来保障销毁工作的顺利进行。结果表明:通过合理化设计、严格化施工和安全保障措施定能圆满完成增雨弹的销毁工作。     

大批量废旧弹药爆破销毁技术的应用

介绍了南京市废旧弹药销毁的整个过程。对弹药进行鉴别分类,确定销毁的实施方法,并对销毁场地进行考察核实;提出废旧弹药装载和运输的注意事项;确定销毁方案的主要技术参数,计算校核爆破振动安全、破片和冲击波的安全距离。经过精心设计和组织,销毁取得圆满成功,可为类似工作提供有益的经验。     

BRIEF TALK ON SITE CHOOSING OF WASTE EXPLOSIVE MATERIALS' DESTRUCTION BY EXPLOSION

爆炸法销毁废旧爆炸物品是一项重要而又危险的工作,对销毁方案的设计和销毁地点的选择都要缜密、慎重,对于其中各个环节都需要精心布置和安排;否则,不但不能有效彻底地销毁爆炸物品,而且还有可能发生事故和产生次生灾害.通过实例对“销毁地点选择”这个重要环节进行了阐述和分析比较,为今后类似销毁工作提供参考.     

上海崇明县质监局开展假冒伪劣产品集中销毁行动

9月15日，上海崇明县质监局对立案查处的假冒伪劣产品进行集中销毁。此次集中销毁的罚没物品为假冒的鞋油软管产品，共计50000只。整个销毁工作严格按照实施细则进行，对罚没物品联系专业单位采取无害化销毁，并对全程进行了摄像监督，制作了销毁记录并拍照备案留存。     

2.5t危险物品销毁的组织与实施

针对某烟花爆竹厂的半成品及化学原材料的销毁作业,根据其种类、化学性质等情况,采用燃烧法分批次实施销毁.销毁过程中通过对危险物品进行危险源辨识,将物品分类,取样试烧后,再对危险物按类进行分批次销毁,且根据销毁过程的注意事项,安全顺利地完成了2.5t危险物品的销毁.     

销毁废旧弹药的技术探讨

近些年,某市收缴了一些民用爆炸物品和战争年代遗留下的军用爆炸物品。这些爆炸物品的存在对人民的生命财产安全构成了极大的威胁。针对这些爆炸物品的特点,进行了销毁方法设计;介绍了其销毁流程;确定了销毁参数;并进行爆破振动安全校核和安全技术措施的制定,销毁取得圆满成功。     

浅谈爆炸法销毁废旧爆炸物品对地点的选择

爆炸法销毁废旧爆炸物品是一项重要而又危险的工作,对销毁方案的设计和销毁地点的选择都要缜密、慎重,对于其中各个环节都需要精心布置和安排;否则,不但不能有效彻底地销毁爆炸物品,而且还有可能发生事故和产生次生灾害。通过实例对"销毁地点选择"这个重要环节进行了阐述和分析比较,为今后类似销毁工作提供参考。     

浅谈爆炸法销毁废旧爆炸物品对地点的选择

爆炸法销毁废旧爆炸物品是一项重要而又危险的工作,对销毁方案的设计和销毁地点的选择都要缜密、慎重,对于其中各个环节都需要精心布置和安排;否则,不但不能有效彻底地销毁爆炸物品,而且还有可能发生事故和产生次生灾害。通过实例对"销毁地点选择"这个重要环节进行了阐述和分析比较,为今后类似销毁工作提供参考。     

高热剂在弹药销毁中的应用

为了解决弹药生产、运输、储存、应用中产生的报废弹药,以及军事演习和战争年代遗留弹药的销毁问题,常采用爆炸法、燃烧法和分解法,但是对于那些不能移动,必须原地销毁的弹药,上述方法存在着很大的安全隐患,必须采用高热剂销毁弹药的方法。高热剂销毁弹药主要包括高热剂金属熔流销毁法和金属熔融依附法,利用铝热反应产生的高温和熔融金属熔渣,对弹药金属壳体进行熔穿,并点燃内部炸药,使炸药产生的高温高压气体由熔穿孔排出,避免了爆炸。高热剂销毁弹药减少了对弹药的处理工序,大大降低了危险系数,对于不便进行移动和预处理,必须进行就地销毁的弹药,有很好的应用价值。但目前高热剂销毁弹药也存在一定的局限性,即都需要特制模具对高热剂药粉进行固型,这就为实际操作和运用带来一定的危险性和局限性。     

销毁废旧弹药的技术探讨

近些年,某市收缴了一些民用爆炸物品和战争年代遗留下的军用爆炸物品。这些爆炸物品的存在对人民的生命财产安全构成了极大的威胁。针对这些爆炸物品的特点,进行了销毁方法设计;介绍了其销毁流程;确定了销毁参数;并进行爆破振动安全校核和安全技术措施的制定,销毁取得圆满成功。     

W18Cr4V合金工具钢在不同介质淬火后性能比较

通过对W18Cr4V合金工具钢在清水、锭子油和高压气体等淬火介质中淬火对比实验,研究W18Cr4V合金工具钢在不同介质淬火工艺处理后的硬度和微观结构.研究结果表明,水淬火时试件表面与中心的温差较大,锭子油次之,高压气体较小;试件高压气体淬火时,温度剃度小,内部冷却比较均匀,可以预计,相应的热应力和热变形也比较小;应用较小压力的氮气能够实现淬透性比较好的W18Cv4V工具合金钢的高压氮气淬火处理.     

锂硫电池循环过程中变形演化的直接观测

实验设计了一种可实时原位观测锂硫电池电极变形及电化学反应过程的实验装置。实验中观测到充放电过程中的硫电极的弯曲形变, 发现放电过程中硫正极形变增大, 曲率增大, 静置和充电过程中形变逐步还原, 曲率随之减小。同时还发现随着电化学反应的进行, 由于放电产物多硫化物的溶解, 正极附近的电解液呈黄色且不断加深。结合扫描电子显微镜(SEM)观察充放电前后的电极断面和表面的形貌, 验证硫正极在充放电过程中出现明显的形变, 从而导致电极曲率的变化。     

Comparison of crashes during public holidays and regular weekends

Traffic collisions and fatalities during the holiday festive periods are apparently on the rise in Alberta, Canada, despite the enhanced enforcement and publicity campaigns conducted during these periods. Using data from 2004 to 2008, this research identifies the factors that delineate between crashes that occur during public holidays and those occurring during normal weekends. We find that fatal and injury crashes are over-represented during holidays. Amongst the three risky behaviors targeted in the holiday blitzes (driver intoxication, unsafe speeding and restraint use), non-use of restraint is more prevalent whereas driver intoxication and unsafe speeding are less prevalent during holidays. The mixed results obtained suggest that it may be time to consider a more balanced approach to the enhanced enforcement and publicity campaigns.     

Pipeline Failure by Transit Fatigue

A spiral welded pipeline failure that occurred during hydrotest was attributed to transit fatigue, caused during highway transportation. Transit fatigue during rail, road and marine transportation is a well-known failure mechanism. American Petroleum Institute (API) standards for prevention of transit fatigue during railroad and marine transportation are already established. Transit fatigue during highway transportation is rarely reported, and there is no industry standard addressing controls for line pipe transportation by highway.     

基于平面应变压缩模型的TA15钛合金热强旋组织性能预测研究

针对热强旋过程的变形特点,本文研究了基于平面应变压缩的物理模拟模型对钛合金热强旋过程的组织性能演变预测的可行性.为此本文对TA15钛合金平面应变压缩变形的组织和热强旋过程进行了对比分析,并以平面应变压缩的组织性能演变模型为基础,采用BP神经网络对TA15钛合金热强旋旋过程的组织性能进行了预测.研究结果表明,TA15钛合金平面压缩变形和热强旋过程的组织性能演变规律基本一致,采用平面应变压缩的组织性能模型可有效预测钛合金热强旋过程的组织演变.但是,由于强力旋压的多道次累积变形较平面压缩的单道次变形更为均匀充分,使得大减薄率时的预测误差略有增大趋势.     

Structural changes in the cells of some bacteria during population growth: a Fourier transform infrared-attenuated total reflectance study

Structural changes occurring in the cells of several bacteria during their growth curves have been investigated by Fourier transform infrared (FT-IR) spectroscopy using the sampling technique of attenuated total reflectance (ATR). Spectra reflect all of the components of the cells, including the cell walls, cell membranes, internal structures, and the cytoplasm. The bacteria studied were Bacillus stearothermophilus, Halobacterium salinarum, Halococcus morrhuae, and Acetobacter aceti. All species showed significant spectral changes during their growth curves, indicating structural changes in the cells during increases in cell numbers. The major change for B. stearothermophilus was in the lipid content, which was at a maximum during the exponential phase of the growth curve. For the halophiles H. salinarum and H. morrhuae, the major change was that the concentration of sulfate ion in the cells varied during the growth curve and was at a maximum during the mid-part of the exponential phase of the growth curve. A. aceti cells showed increasing polysaccharide content during the growth curve as well as maximum lipid content during the exponential phase of growth.     

The formation of multipoles during high-temperature creep of austenitic stainless steels

It is shown that multipole dislocation configurations can arise during power-law creep of certain austenitic stainless steels. These multipoles have been analysed in some detail for two particular steels (Alloy 800 and a modified AISI 316L) and it is suggested that they arise either during instantaneous loading or during the primary creep stage. Trace analysis has shown that the multipoles are confined to {1 1 1} planes during primary creep but are not necessarily confined to these planes during steady-state creep unless they are pinned by interstitials.     

Investigation of sub-critical fatigue crack growth in FRP/concrete cohesive interface using digital image analysis

The cohesive stress transfer during the sub-critical crack growth associated with the debonding of FRP from concrete under fatigue loading is experimentally investigated using the direct shear test set-up. The study focused on high-amplitude/low-cycle fatigue. The fatigue sub-critical crack growth occurs at a load that is smaller than the static bond capacity of the interface, obtained from monotonic quasi-static loading, and is also associated with a smaller value of the interfacial fracture energy. The strain distribution during debonding is obtained using digital image correlation. The results indicate that the strain distribution along the FRP during fatigue is similar to the strain distribution during debonding under monotonic quasi-static loading. The cohesive crack model and the shape of the strain distribution adopted for quasi-static monotonic loading is indirectly proven to be adequate to describe the stress transfer during fatigue loading. The length of the stress transfer zone during fatigue is observed to be smaller than the cohesive zone of the interfacial crack under quasi-static monotonic loading. The strain distribution across the width of the FRP sheet is not altered during and by fatigue loading. A new formulation to predict the debonding crack growth during fatigue is proposed.     

钢筋混凝土结构施工活荷载现场调查与统计分析

施工过程中的安全分析与控制要求对施工活荷载有较准确的估计。本文通过对一批钢筋混凝土结构在施工期间活荷载的现场调查、统计和分析，发现施工活荷载中堆积荷载是主要的，施工活荷载可以用指数分布描述，对指数分布的参数进行估计，并将施工活荷载转化为均布荷载。参照结构正常使用阶段荷载标准值的取法，给出了钢筋混凝土结构施工活荷载标准值的建议。研究结果可用于施工期结构的安全分析与控制，承包商也可以据此合理安排施工进度及现场材料的堆放。