近年国内氮化碳薄膜的研究现状与应用展望

叙述了氮化碳的理论研究成果及各种特性，就1998年后国内一些研究机构及大学院校的研究成果进行了介绍，对今后制备碳氮薄膜需要解决的问题及在某些领域中的应用前景进行了展望。     

Pr掺杂对欠氧YBa2 Cu3O7-δ结构与超导电性的影响

由于稀土Pr的特殊性,在Y-123中用Pr替代Y被人们广泛研究,但报道的结果常不一致,甚至相互矛盾。本文详细研究了Pr掺杂对YBa2Cu3O7-δ(Y-123)的结构与输运性质的影响。借助Rietveld方法,对不同掺杂的样品进行了细致的结构分析,并从结构的变化及替代所引起的结构应变、电荷变化的角度解释了Pr掺杂样品所具有的输运性质的变化。     

Experimental Study on Mechanical Properties of Micro-Structured Porous Silicon Film

Mechanical properties of micro-structured porous silicon film (PS) were studied combining X-ray diffraction with micro-Raman spectroscopy. The micro-structured porous silicon samples with different porosities ranging from 30.77% to 96.25% were obtained by chemical etching. Lattice parameters of the samples were measured using X-ray diffraction and its maximal change is up to 1.0%. This lattice mismatch with the bulk silicon substrate may introduce residual stress to the porous film. The residual stress measurement by micro-Raman spectroscopy reveals that the maximum of tensile residual stress has reached GPa level in the porous film. Moreover, the lattice mismatch and its corresponding residual stress are increasing with the porosity of PS, but average elastic modulus is about 14.5 GPa, one order of magnitude lower than that of substrate Si. The mechanical properties of PS have aclose relation with its micro-pore structure.     

显示器视觉特性化研究

目前显示器特性化常用仪器测量的方法使出版系统和一些网络用户要求更方便、快速地进行颜色通信和再现．实验利用人的眼睛视觉特点,采用同色闪烁光度测量法估计GoG参数,进行显示器特性化研究。实验表明,这种方法对L^o,a^o、b^o控制的精度分别是0．16,0．84,1．95,对色差CIELAB的控制糟度是2.31．     

关于必然命题种类的探讨

必然命题是逻辑学中一类重要命题，自从有了可能世界的理论．关于必然命题种类的探讨越来越深入，具体。本文初步探讨了关于必然命题的一些主要种类。     

在n维赋范空间中单位球体积及其渐进性质

Let Bnp={x ∈ Rn‖|x ‖p≤l} be the unit ball ofp norm in the n-dimensional normed space p. The formula for the volume of Bnp was obtained and its asymptotic properties were found out as n→∞and p→∞.     

原位合成TiC增强420不锈钢的力学性能和抗磨损性能

用原位合成方法制备了TiC增强420不锈钢基复合材料, 并研究了复合材料的显微组织、力学性能和抗磨损性能. 实验结果表明, 当复合材料中TiC颗粒体积分数低于6%时, 材料中TiC颗粒分布均匀, 颗粒的尺寸在5～10 μm左右; 但颗粒体积分数大于6%后, 显微组织中出现TiC颗粒的轻微偏聚. 随着TiC体积分数的增加, 材料的抗拉强度和屈服强度先是增高, 当TiC体积分数达到5%时, 强度达最大值. 此后增加TiC体积分数会导致强度的下降. 复合材料的塑性随TiC体积分数的增加呈单调下降的趋势. TiC颗粒的引入使材料的抗磨损性能得到显著改善, 但当TiC体积分数达到11%时, 抗磨损性能接近一个稳定的水平. 继续增加TiC含量, 材料的抗磨损性能不再发生明显变化.     

水族铜鼓文化属性的考察与研究

流传于水族地区的铜鼓属滇系铜鼓中的晚期鼓。水族铜鼓在祭祀活动中作为礼（神）器，在巫师活动中作为法器，在节庆舞蹈中作为乐器。铜鼓是水家人权利和财富的象征，每逢过端、过卯，跳铜鼓舞成了水族青年男女必不可少的娱乐活动。     

Test and Analysis of an Existing Tunnel Vibration Induced by Blasting Construction of Diaphragm Wall

According to the blasting construction of the diaphragm wall of Puxi approaching section of East Fuxing Road river-crossing tunnel, the monitoring project of the vibration of the existing tun-nel induced by the blasting construction is put forward, which includes the sensors’ location, moni-tor method and the vibration monitoring system. Based on the monitoring data of the explosion vibration, the vibration wave forms, velocities, acceleration responses, main frequencies and fields of measure points are analyzed under the conditions of three locations and different charge quanti-ties. According to the safety-judging standard of explosion vibration, the conclusion that the exist- ing tunnel is safe under the explosion vibration is then drawn. Furthermore, the spectrum character-istics of three explosion vibrations and the spectrum changing properties of explosion vi-bration wave transmitting in different directions are concluded, which can provide reference to similar projects.     

Dynamic response of RPC-filled steel tubular columns with high load carrying capacity under axial impact loading

Experimental investigation into impact-resistant behavior of reactive powder concrete (RPC)-filled steel tubular columns was conducted,and dynamic response of the columns under axial impact loading was studied by means of numerical simulation method.Increase coefficient of load carrying capacity and ratio of load carrying capacity between steel tube and RPC core of col-umns were obtained.