线圈型电磁发射器换向过程分析

定量地分析了线圈型电磁发射器换向过程中能量的转化及转移,并利用Ansoft电磁场有限元分析软件对换向过程进行了仿真计算,得到以下结论：①换向过程中,驱动线圈层数固定时,增大弹丸线圈层数会提高发射器能量转换效率;②弹丸线圈层数固定时,驱动线圈层数增大会在一定程度上降低发射器能量转换效率;③当驱动线圈与弹丸线圈层数较大时,换向之后储存在炮管线圈中的巨大能量会在炮口处以炮口电弧的形式释放。     

快速成型技术及在装备零件仿制中的应用

针对现代武器装备保障对维修零件小批量、多品种产品的生产要求,对快速成型(rapid prototyping,RP)技术在装备零件仿制中的应用进行研究。简要介绍RP的基本原理、技术特点及分类、应用方向,并结合实例分析RP技术在武器装备复杂形面零件仿制中的应用。结果表明:仿制的"开闩曲臂"和"右抽筒子"与零件原件的精度误差优于0.1 mm,符合装备零件制造标准要求。     

TANPyO及其金属配合物的合成与性能

用2,4,6-三氨基-3,5-二硝基吡啶-1-氧化物（TANPyO）作配体,合成了两种过渡金属[Ni（Ⅱ）和Cu（Ⅱ）]配合物,并用红外、元素分析、DSC、TG-DTG 进行了表征。研究了两种配合物对高氯酸铵（AP）热分解的影响。按 GJB772A -1997测试了TANPyO的感度。结果表明,配合物的热分解过程仅由1个剧烈放热峰组成,剩余残渣为金属氧化物。两种配合物使AP高温分解峰温度分别提前47．14℃和98．24℃,分解速度加快,放热量增加,显示这两种配合物对AP热分解有良好的催化效果。撞击落高为300 cm,摩擦感度和静电火花感度均为0,表明TANPyO是一种非常钝感的含能材料。     

士兵职业技能鉴定平台的组卷算法设计

分析了装甲装备保障专业士兵职业技能鉴定平台在使用过程中存在的组卷质量问题,对鉴定考核的组卷过程进行了阐述并建模,提出了改进的遗传算法作为组卷算法,实现了快速、高质量组卷的目的。     

影响胰腺癌疗效的多因素分析

目的探讨影响胰腺癌疗效的因素。方法１２０例胰腺癌进行统计学分析,应用COX比例风险模型对可能影响胰腺癌疗效的指标进行多因素分析,并用Kaplan－Meier法计算生存率。结果肿瘤分期和KPS评分是影响胰腺癌预后的独立因素。结论肿瘤分期和KPS评分是影响胰腺癌治疗后生存期的相关因素。     

CT引导下经皮穿刺氩氦刀靶向冷冻治疗肾癌

目的初步建立氩氦超导手术系统（简称氩氦刀）靶向冷冻治疗肾癌的技术和探讨其原理、安全性及近期疗效。方法７例肾癌患者采用氩氦刀,在CT引导下经皮穿刺对肿瘤病灶行冷冻治疗。结果７例患者冷冻治疗后未出现出血、皮肤冻伤、感染或穿刺道种植转移等严重并发症。７例在冷冻治疗后１个月,CT显示病灶区内出现低密度坏死区,５例肿瘤大小无改变,２例瘤体有不同程度缩小。结论CT引导经皮穿刺氩氦刀冷冻治疗肾癌是一种安全、有效、微创治疗,特别是对于不能行手术切除的肾癌病例。     

CT引导下兔VX２肝癌模型的制作及综合评估

目的探讨CT引导下兔VX２肝癌模型的制作及影像学和组织学评估。方法选择新西兰大白兔２９只作为实验动物（前期９只,后期２０只）,采用CT引导下经皮穿刺瘤组织块种植于兔肝左中央叶。前期从左侧肋缘进针,术后未予抗感染;后期从剑突下最大层面进针,术后抗感染３d。分别于接种后１、２、３和４周行CT增强扫描及组织学观察。结果前期实验移植模型成瘤率为８８．９％,腹壁种植转移率为６２．５％,５０％并发胸腔积液。后期实验肝癌移植模型成功率为９５％,腹壁种植转移率为１０．５％,无并发胸腔积液。CT平扫瘤体为低密度或等密度,均匀强化（２周）或环状强化（３周、４周）;静脉期、延迟期呈低密度,但CT值较动脉期无明显下降。组织学上VX２为血管丰富的低分化鳞状细胞癌,２周出现点灶状凝固性坏死,３周出现肝内转移,４周出现大量凝固性坏死。自然生存时间为５～９周,死亡原因主要为广泛肺和腹腔转移伴全身衰竭。结论CT引导下兔VX２肝癌模型的制作成功率高,并发症发生率低,进行兔VX２肝癌模型介入治疗实验研究宜选择２周为宜     

Improvement of cathode–electrolyte interfaces of tubular solid oxide fuel cells by fabricating dense YSZ electrolyte membranes with indented surfaces

To improve cathode–electrolyte interfaces of solid oxide fuel cells (SOFCs), dense YSZ electrolyte membranes with indented surfaces were fabricated on tubular NiO/YSZ anode supports by two comparable methods. Electrochemistry impedance spectroscopy (EIS) and current–voltage tests of the cells were carried out to characterize the cathode–electrolyte interfaces. Results showed that the electrode polarization resistances of the modified cells were reduced by 52% and 35% at 700 °C, and the maximum power densities of cells were remarkably increased, even by 146.6% and 117.8% at lower temperature (700 °C), respectively. The indented surfaces extended the active zone of cathode and enhanced interfacial adhesion, which led to the major improvement in the cell performance.     

Defrost improvement by heat pump refrigerant charge compensating

During winters, the air-source heat pump often operates with substantial frost formation on the outdoor heat exchanger, and the frost layer has to be melted away periodically to keep a high heat pump coefficient of performance (COP). Otherwise, the unmelted frost layer and water will become high density frost or ice layer in heating mode. However, it is difficult to melt the frost layer in the defrosting cycle, where the effective defrosting time plays an important role in improving the defrosting ability. Generally, the defrosting time can be decreased by the following ways: increasing the refrigerant flow rate effectively, and rapidly establishing the suction pressure, discharge pressure, and the compressor power. A new heat pump defrost system with a refrigerant charge compensator, instead of the accumulator which is a key component for the frosting cycle performance, is developed in this paper. Furthermore, test results showed that the improved frost system with the compensator worked as expected, and its suction and discharge pressures and the power of the compressor during the defrosting were much larger than before.