青春期性梦的发生现状与分析

对１３１７名青春期中学生的调查表明，他们的性梦发生率为４８．３％，男性显著高于女性．发现大约有１０％和２％～３％的人对性梦分别存在感觉和认识上的心理压抑，应该加强对他们的青春期教育     

煤微生物转化产物对色素微生物和蔬菜的刺激作用

在两种产色素微生物的培养基中，加入煤的微生物转化产物，所得微生物发酵液的色素浓度及吸光度有较显著的增加，将煤生物转化产物作为蔬菜生长刺激素的实验亦取得了显著效果，该结果揭示煤微生物转化产物在生物激素上的重要应用前景。     

Initiating, growing and cracking of hydrogen blisters

The growing process of a hydrogen blister in a wheel steel was observed in situ with an optical microscope, and the fracture surfaces formed from broken blisters on a wheel steel and bulk metallic glass were investigated. The initiating, growing, cracking and breaking of hydrogen blisters are as follows. Supersaturated vacancies can increase greatly during charging and gather together into a vacancy cluster （small cavity）. Hydrogen atoms become hydrogen molecules in the vacancy cluster and hydrogen molecules can stabilize the vacancy cluster. The small cavity becomes the nucleus of hydrogen blister. The blister will grow with entering of vacancies and hydrogen atoms. With increasing hydrogen pressure, plastic deformation occurs first, the hydrogen blister near the surface extrudes, and then cracks initiate along the wall of the blister with further increasing hydrogen pressure. A cracked blister can grow further through propagating of cracks until it breaks.     

碱激发胶凝材料的碳化性能研究进展

碱激发胶凝材料作为新型绿色建筑材料,在促进工业固体废料的循环使用、减少CO2气体排放等方面有着突出的优势,近几年针对这种材料耐久性能的研究越发受到重视,碳化作为影响耐久性能的关键因素,也需要进一步的研究。从碳化机理、碳化速率、碳化影响以及抗碳化性能改善方面总结了碱激发胶凝材料碳化性能研究现状,概述了目前碳化领域研究所取得的成果和面临的困难。基于已有成果,提出了研究建议,以期为碱激发混凝土的发展和推广应用提供参考。     

7475高强铝合金超塑变形空洞形核研究

利用高压电镜和金相显微镜对7475高强铝合金超塑变形中的空洞形核问题进行了研究。结果表明空洞主要形成在超塑变形过程中,而不是形核于形变热处理中。空洞形核的主要原因是晶界滑移在晶界不平整处受阻,产生应力集中。     

Simultaneous Multithreading Fau Tolerance Processor

Transient fault detection mechanism is added to simultaneous muhithreading architecture. By exploiting both ILP (Instruction l~evel Parallelism) and TLP (Thread Level Parallelism), Simultaneous Multithreading(SMT) Fault Tolerance Processor can be expected to achieve better tradeoff between performance and hardware cost than traditional Fault Tolerance Processors. Detailed simulations of 3 of SPEC95 benchmarks show that executing two redundant programs on the fault-tolerant microarchitecture takes only 40%-61% longer than running a single version of the program. The new instruction fetch algorithm enhances the performance by 0. 4%～1% to most of the benchmarks we choose randomly.     

Windows数据库应用系统中库操作的健壮性设计

对任何一个应用系统，程序的健壮性是衡量系统优劣的一个重要指标。本文就对在Ｗｉｎｄｏｗｓ系统下用Ｆｏｘｐｒｏ２．５开发应用系统时，库操作方面的一些健壮性设计，介绍了工作区的分配、库的打开、关闭和备份等操作的健壮性设计方法。有关程序均经过验证，并在我系开发的一些应用系统中运用。     

置换空间PXXn性质的补充

我们主要给出了如下结论：（1）若X是自反局部一致凸Banach空间，则PXXn是极端凸的当且仅当每个Xn(n=1,2,…）都是极端凸的；（2）若X^*是局部一致凸的，则PXXn是一致Gateaux可微的当且仅当每个Xn(n=1,2,…)都是一致Gateaux可微的。     

低成本人体步态在线检测系统

研究了一种由 CCD摄像机、三维测力台及表面肌电信号检测装置组成的人体步态在线检测系统。在该系统中图像、力和表面肌电信号都由一台计算机实时采集。采用普通监控用图像设备和边缘检测、模板匹配等方法识别运动图像中的标志点 ,降低了系统硬件成本和对测试背景的要求。初步应用结果表明 :系统同步性能好 ,空间分辨率小于0 .2 %。该系统不仅适合于临床进行步态分析 ,而且也可用作其他与人体运动姿态有关研究的检测平台。     

Excitatory glycine receptors containing the NR3 family of NMDA receptor subunits

The N-methyl-D-aspartate subtype of glutamate receptor (NMDAR) serves critical functions in physiological and pathological processes in the central nervous system, including neuronal development, plasticity and neurodegeneration. Conventional heteromeric NMDARs composed of NR1 and NR2A-D subunits require dual agonists, glutamate and glycine, for activation. They are also highly permeable to Ca2+, and exhibit voltage-dependent inhibition by Mg2+. Coexpression of NR3A with NR1 and NR2 subunits modulates NMDAR activity. Here we report the cloning and characterization of the final member of the NMDAR family, NR3B, which shares high sequence homology with NR3A. From in situ and immunocytochemical analyses, NR3B is expressed predominantly in motor neurons, whereas NR3A is more widely distributed. Remarkably, when co-expressed in Xenopus oocytes, NR3A or NR3B co-assembles with NR1 to form excitatory glycine receptors that are unaffected by glutamate or NMDA, and inhibited by D-serine, a co-activator of conventional NMDARs. Moreover, NR1/NR3A or -3B receptors form relatively Ca2+-impermeable cation channels that are resistant to Mg2+, MK-801, memantine and competitive antagonists. In cerebrocortical neurons containing NR3 family members, glycine triggers a burst of firing, and membrane patches manifest glycine-responsive single channels that are suppressible by D-serine. By itself, glycine is normally thought of as an inhibitory neurotransmitter. In contrast, these NR1/NR3A or -3B 'NMDARs' constitute a type of excitatory glycine receptor.