锂电池小电流放电的可靠性分析

根据水雷电源的特点,对锂电池小电流放电特性及其贮存寿命进行了试验.并利用数理统计的图估法对试验数据进行处理,得出了锂电池小电流放电特性的失效规律.同时应用极大似然法估计出锂电池的可靠度.对在水雷电源中合理地使用锂电池提供了依据.     

浮石泡沫混凝土破坏机理的研究

本文对单轴压应力下浮石泡沫混凝土及混凝土中浮石粗集料、砂浆、界面过渡层的变形和微裂纹的产生和扩展进行了试验研究。提示了浮石泡沫混凝土的破坏机理。     

抗震结构的破坏准则评述及探讨

本文详细讨论了现有抗震结构破坏评估准则并指出其不足和存在问题,提出了深入研究抗震结构破坏准则的基本思路。     

新型感应透热炉逆变电路的理论分析

研制了一种新型逆变电路,与国内常用感应炉逆变桥比较,其特点为工作频率高、输出电压低、电热效率高、结构简单,经工业生产试用,感应炉运行可靠,功率损耗低,加热中小类锻件,具有明显的优点。本文对该新型逆变电路的稳态过程,建立微分方程,推导出输出功率、电流、电压、频率、功率因数的计算公式,为电炉设计及元件参数选择提供了依据。同时将该电路与常用并联逆变电路性能比较,论证了其优越性。     

金属基聚合物内衬复合压力容器界面剥离失效及预防

基于构建的裂纹剥离扩展失效过程的模拟方法,提出了预测临界载荷的方法,并通过界面的临界应变能释放率与损伤起始应力,构建了预防界面裂纹剥离扩展失效的等值临界真空压力约束预防控制线和设计准则。结果表明,临界压力载荷受控于界面初始预裂纹长度、复合界面的临界应变能释放率（GIC）和损伤起始应力（T0）,与界面初始预裂纹长度呈负关联关系,而与临界应变能释放率与损伤起始应力呈正关联关系;当初始预裂纹长度由11.11 %增至15.55 %时,临界压力载荷（Pc）由87.6 kPa降至为57 kPa,降幅为34.9 %;内衬界面剥离韧性参数（T0,GIC）的坐标点位于等值临界真空压力约束控制线之上,可有效预防内衬界面剥离扩展失效。     

R-curve behaviour in weak interface-toughened SiC-C laminates by discrete element modelling

Tough ceramics can be made by introducing weak interfaces which deflect a growing crack. A simple discrete element model was employed to study crack growth in SiC-C laminate with graphite as weak interfaces. By modelling the three-point-bending test of the notched laminate, de-bonding, de-lamination and crack deflection were observed dynamically. The fracture features of the laminate as like “graceful failure” and R-curve behaviour were replicated both qualitatively and quantitatively. It has been revealed that the strength of the weak interface should be in a certain range to assure the appearance of the toughening effect. A minimum presence of the weak interface is required to increase the strength of the laminate. The employed model is explicit and simple, it can be used to reproduce the dynamic process of crack propagation in ceramic laminates and guide the design of the laminate's structure in the future.     

Monitoring tensile fatigue crack growth and fiber failure around a notch in laminate SIC/SIC composites utilizing acoustic emission,electrical resistance,and digital image correlation

Acoustic emission, electrical resistance, and surface optical techniques were used to monitor matrix cracking and fiber-breakage during fatigue in tension for [0/90]2s SiC-based laminate composite single-notch specimens. Acoustic emission sensors were positioned in several locations including on the edge of the specimen which enabled location of events through the width and the location of internal tunnel-type cracks. Surface optical techniques, including digital image correlation, enabled the extent of surface crack growth. From these two sets of data a simple circuit could be constructed of the different damaged and undamaged regions in the region of the notch that was in good agreement with the change in electrical resistance, thus establishing a correlation with change in ER and damage development. The unique placement of AE sensors on the edge of the specimen also enabled the capture and location of what are believed to be fiber failure events prior to ultimate failure.     

Anti-Fibrotic Effects of Class I HDAC Inhibitor,Mocetinostat Is Associated with IL-6/Stat3 Signaling in Ischemic Heart Failure

Background: Recent studies have linked histone deacetylases (HDAC) to remodeling of the heart and cardiac fibrosis in heart failure. However, the molecular mechanisms linking chromatin remodeling events with observed anti-fibrotic effects are unknown. Here, we investigated the molecular players involved in anti-fibrotic effects of HDAC inhibition in congestive heart failure (CHF) myocardium and cardiac fibroblasts in vivo. Methods and Results: MI was created by coronary artery occlusion. Class I HDACs were inhibited in three-week post MI rats by intraperitoneal injection of Mocetinostat (20 mg/kg/day) for duration of three weeks. Cardiac function and heart tissue were analyzed at six week post-MI. CD90⁺ cardiac fibroblasts were isolated from ventricles through enzymatic digestion of heart. In vivo treatment of CHF animals with Mocetinostat reduced CHF-dependent up-regulation of HDAC1 and HDAC2 in CHF myocardium, improved cardiac function and decreased scar size and total collagen amount. Moreover, expression of pro-fibrotic markers, collagen-1, fibronectin and Connective Tissue Growth Factor (CTGF) were reduced in the left ventricle (LV) of Mocetinostat-treated CHF hearts. Cardiac fibroblasts isolated from Mocetinostat-treated CHF ventricles showed a decrease in expression of collagen I and III, fibronectin and Timp1. In addition, Mocetinostat attenuated CHF-induced elevation of IL-6 levels in CHF myocardium and cardiac fibroblasts. In parallel, levels of pSTAT3 were reduced via Mocetinostat in CHF myocardium. Conclusions: Anti-fibrotic effects of Mocetinostat in CHF are associated with the IL-6/STAT3 signaling pathway. In addition, our study demonstrates in vivo regulation of cardiac fibroblasts via HDAC inhibition.     

我国干燥技术和装备的研究及应用

介绍我国干燥设备的开发、研究和应用情况。情况表明：我国干燥技术有很大的进步，大批进口干燥器的时代已经结束。