Water bamboo husk reinforced poly(lactic acid) green composites

The water bamboo husk is one of major agricultural wastes in Taiwan. In this study, the powder obtained from the water bamboo husk was added to poly(lactic acid) (PLA) to form novel reinforced biodegradable composites. Morphologies, mechanical properties, and heat resistance of these water bamboo powder reinforced composites were investigated. The results indicate that the char yields were increased as plant powder was incorporated to PLA. In addition, the mechanical properties were also enhanced due to the addition of powders. The increments of storage moduli of PLA were about 50–200%. Moreover, the increments of loss moduli of PLA were about 70–200%. On the other hand, the T_g of PLA was slightly decreased by the addition of powder, and this may improve the brittle characteristics of PLA. Furthermore, this type of reinforced PLA would be more environmental friendly than the artificial additive‐reinforced one. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers     

漫谈钛合金在舰船上的应用

钛合金优良的耐海水腐蚀性能、高的比强度、无磁性等特点,使其在船用领域大有潜力可为,我国的船用钛合金经过近40年的研究开发,基本能满足舰艇不同强度级别的需求,在舰船上应用具有明显的社会效益和经济效益,值得进一步应用推广。本文介绍了国内外舰船用钛合金的开发及应用情况。对钛合金在鱼雷发射水缸、高压气瓶、一回路危急冷却器、声扫雷具、二回路泵、阀及管系、声纳导流罩、螺旋桨等方面的应用作了重点介绍。     

地方热电联产企业发展对策的探讨

介绍了泰州热电企业的运行情况，分析了各热电厂在技术改造、扩大热用户和强化内部考核管理方面的措施，探讨了地方热电企业应采取的对策和发展思路。     

Metal micromolding: further experiments and preliminary finite element analysis

We report results of instrumented microscale compression molding experiments on Al with Ta mold inserts. The Ta inserts have high-aspect-ratio microscale structures fabricated by micro-electrical-discharge-machining. These microscale structures were further surface engineered by electrochemical polishing, followed by deposition of a conformal amorphous hydrogenated carbon based coating. The molding response of Al, in terms of molding force versus insert displacement, was measured in situ with a high-vacuum, instrumented, compression molding apparatus, and rationalized with a simple model on the mechanics of molding. Molding response was further studied numerically through finite element analysis.     

高功率激光系统通过空间滤波和中继成像抑制自聚焦

讨论了由光束自聚焦引起的细丝形成和光束分裂，为了克服聚焦造成的破坏要求在光束传播中采用中继成像和空间滤波。     

LD泵浦Nd：YVO4内腔倍频激光器获得120mW绿光连续输出

利用半导体激光器（ＬＤ）端面泵浦Ｎｄ：ＹＶＯ＿４和用ＫＴＰ内腔倍频的绿激光器获得了１２０ｍＷ连续、稳定的５３２ｎｍ绿激光输出。泵浦阈值Ｐ＿（ｔｈ）＝１６０ｍＷ，光－光转换效率η＿ｓ＝８．１％。换用激光腔输出耦合镜，在不加ＫＴＰ晶体倍频时，可连续输出１．０６μｍ的红外激光，输出功率为４５０ｍＷ，光－光转换效率为３１％。     

组合式光纤流量传感器

提出了一种新型的组合式光纤流量传感器，介绍了它的工作原理，详细讨论了光脉冲转换器的设计要点，据此设计了传感头，并给出了它的实验结果。     

厅堂音质的听觉化模拟技术

厅堂音质的听觉化模拟技术是计算机技术、室内声学、电声技术相结合的双耳听觉化模拟技术，是新一代的厅堂音质ＣＡＤ技术的关键。同时听觉化模拟技术也为未来新的立体声制式的出现提供了可能性，这对未来的数字立体声广播、多媒体广播都可能产生巨大的潜在影响。本文对此项技术的原理、声场模拟、听演化实现过程、软件研究及应用前景等作了简要的介绍。     

Computation of 2D discrete Hartley transform

Based on a decimation-in-time decomposition, a fast split-radix algorithm for the 2D discrete Hartley transform is presented. Compared to other reported algorithms, the proposed algorithm achieves substantial savings on the number of operations and provides a wider choice of transform sizes     

Anomalous variations of OFF-State leakage current in poly-Si TFTunder static stress

Studies the anomalous variations of the OFF-state leakage current (I_OFF) in n-channel poly-Si thin-film transistors (TFTs) under static stress. The dominant mechanisms for the anomalous I_OFF can be attributed to (1) I_OFF increases due to channel hot electrons trapping at the gate oxide/channel interface and silicon grain boundaries and (2) I_OFF decreases due to hot holes accumulated/trapped near the channel/bottom oxide interface near the source region. Under the stress of high drain bias, serious impact ionization effect will occur to generate hot electrons and hot holes near the drain region. Some of holes will be injected into the gate oxide due to the vertical field (~(V_Gstress V_Dstress)/T _OX) near the drain and the others will be migrated from drain to source along the channel due to lateral electric field (~V_Dstress/L_CH)