“两集中、三到位”下的吴江市水行政许可情况研究

吴江市实施“两集中、三到位”后,水行政许可工作水平得到明显提升,水行政许可职能得以理顺,使审批事项更为集中,审批流程更加优化,缩短了审批所需时间,提高了行政效能,优化了队伍结构,提升了服务水平.但针对水行政许可工作中存在的一些问题,仍需加强沟通和宣传,加大后续监管力度,不断进行制度创新,使之与水利现代化建设相适应.     

基于STC89C52单片机的无线遥控小车的设计与实现

本设计采用STC89C52单片机,电机驱动电路,无线遥控器及液晶设计而成。采用模块化的设计方案,在有障碍物的情况下利用无线遥控器实现20米内的无线遥控,控制小车的前进、后退、加速、减速、左转、右转。通过液晶、无线数据通信以及温度检测电路,将小车所处的环境温度通过无线通信显示在遥控器的液晶显示屏上,从而实现实时的无线数据采集。     

Surface energy-driven adhesion of two opposing microcantilevers

Summary This paper studies surface energy-driven adhesion of two parallel microcantilevers oriented in opposite directions. Adhesion becomes possible when an attached state of the two opposing cantilevers becomes an equilibrium state at which the release rate of the strain energy with respect to the attached length is equal to the surface energy per unit length. The analytical model developed here predicts that the critical values of surface energy for initial adhesion and full adhesion of two opposing cantilevers increase monotonically with increasing overlap length. This is attributed to the fact that increasing overlap length leads to a decrease in the unattached suspended length of the cantilevers and then an increase in the release rate of the strain energy, which requests a higher surface energy for adhesion of the two cantilevers. Therefore, the strength of two opposing cantilevers against adhesion can be enhanced by increasing the overlap length. When adhesion occurs, because of lower surface energy and shorter attached length, the attached state of two beams of small or moderate overlap length always has a higher total energy than the unattached straight beams before the full adhesion is reached. On the other hand, because of higher surface energy and longer attached length, the total energy of the attached state of two beams of large overlap length can be lower than the total energy of the unattached straight beams even before the full adhesion is reached. In particular, for the first time to our knowledge, the present results show quantitatively how much the critical values of surface energy density for adhesion of two opposing cantilevers are lower than the critical values of surface energy density for adhesion of a single cantilever attracted by a rigid substrate or other similar problems studied in the literature. These results could have significant consequences to MEMS design especially for combdrive technology.     

镍基熔覆涂层受冲击载荷作用下的性能研究

45钢及1Cr18Ni9Ti表面激光熔覆WFCL-11涂层，研究了激光熔覆涂层与基体界面及表面显微组织和硬度特点，分析在冲击载荷作用下，显微组织、结合性能、硬度变化等特点。发现了不同基材与熔覆材料对结合面性能的影响。     

偏振模色散前馈方案中偏振主态研究

前馈偏振模色散（PMD）补偿系统中重要的一项是要精确得到链路中的偏振主态（PSP）方向。通过在实验中加入扰偏器，分别用矢量法和粒子群优化（PSO）算法来拟合实验结果得到椭球，从而用椭球法得出了主态方向。结果表明：矢量法在获得椭球要比PSO算法更精确、速度更快以及所得到PSP方向更准确，其更适合用于前馈补偿方案中。     

离子束辅助沉积对TiAlSiN薄膜性能的影响

分别利用真空电弧沉积技术与等离子体辅助真空电弧沉积技术在不锈钢片、高速钢片和单晶硅片上沉积TiAlSiN多元薄膜，通过X射线衍射和扫描电镜对采用两种方法制备的薄膜物相及表面形貌进行了分析比较，测定了高速钢片上薄膜的显微硬度，进行了耐磨性实验。结果表明，采用离子束辅助沉积制备的薄膜，有（200）面的择优取向，薄膜的表面形貌得到改善，硬度和耐磨性提高。     

Coating of SiC Powder with Nano YAG Phase

SiCceramiccompositeshavefoundextensiveap plicationsinmodernindustryduetotheirexcellentchemicalstabilityandwear resistance .Rodeghieroetal.[1～ 3 ] investigatedthefabricationofSiC Al2 O3 ce ramiccompositematerialsviaco precipitationcoatingandsol gelmethods…     

移动IPv6的路由特性分析

移动IPv6是为了使各种移动设备在下一代IP网络间实现无缝漫游而设计发展的路由协议。尽管在移动IPv4中已经解决了节点移动的问题,但由于IPv4本身的限制,它无法解决各种节点和网络移动组合的路由情况。文章在移动IPv6下,不仅对节点移动,还对网络移动的路由特性进行了分析。     

原位合成羟基磷灰石/明胶复合材料及表征

以Ca(NO3)2、(NH4)2HPO4和明胶为起始原料,采用原位合成的方法,制备与自然骨成分和结构相似的羟基磷灰石/明胶复合材料(HA/Gel).采用各种分析手段对样品进行表征.红外结果表明HA/Gel中波数为1339cm-1的酰胺基团向低波数发生了红移;X射线衍射证明HA/Gel复合材料中的元机相主要为低结晶度、晶粒尺寸细小的羟基磷灰石;热重结果证明本试验制备的HA/Gel中Gel的含量达到15%左右;采用扫描电镜观察HA/Gel复合材料的微观形貌.扫描电镜观察发现HA颗粒定向分布在Gel连续相基体上,本试验结果证明HA与Gel形成键性结合,是一种颇有前途的骨组织替换材料.     

动态扩充的零件库系统的研究与开发

在对零件库设计方法进行了深入研究和分析的基础上 ,提出了基于 C/ S模式的零件库系统构架 ,设计了链表式数据库 ,并提出了基于链表式数据库的动态匹配算法 ,实现了零件库 (含组合件 )系统的动态扩充和零件及组合件尺寸参数的离线编辑功能 ,从而大大地提高了零件库、组合件库的建库效率 ,所开发的零件库系统已应用于“基于知识的机床夹具 CAD系统”,取得了良好的效果