八盘峡水电厂5号机组改造及D179a型转轮的应用

Ｄ１７９ａ水轮机转轮是东方电机厂在八盘峡水电厂５号水轮机改造过程中，研制的一个性能优良的模型转轮。实践证明该转轮比瑞典原有ＫＶ４转轮大流量区的效率明显提高，空蚀性能优良，其最优工况点效率可比原转轮提高２．２％，设计点的效率在９２％左右，是２０ｍ水头段性能优良的转轮之一，Ｄ１７９ａ水轮机转轮在八盘峡水电厂５号水轮机改造的情况和现场试验的结果，可供其他水轮机改造和优化时参考。     

国外的荧光增白剂(Ⅰ)

综述了国外的荧光增白剂、并介绍了约80种最重要的工业化产品的制法和主要性能。     

复合绝缘子伞套间粘接结构及性能的分析

为了确保伞套间粘接性能，选用特配的粘合剂，采取半自机械化套粘伞裙装置，把自动化打磨好内口表面的、与护套采用过盈配合的、内绝缘强度高于外绝缘强度1倍所确定的内口长度的伞裙套粘在护套上。保证伞套间粘接部位实现硅氧烷分子交链完全、补强剂颗粒表面羟基及分子间范德华力利用充分、没有大直径填充剂颗粒存在的界面，使界面具有较高的机械强度和良好的绝缘性能。伞间套的过盈配合在相应部位处所出现的弹性变形，因其网状分子结构中的硅氧烷分子螺旋状态的存在，而使其蠕变性能极为缓慢，应力松弛现象几乎不存在．伞套间粘接性能是可靠的。     

Influence of cerebral lesions on psychological test performances of older children.

50 brain-damaged children ranging in age from 10 through 14 years were matched in pairs with 50 normally functioning children on the variable of age. Each subject was administered individually a wide variety of psychological tests. The sensitivity of each test to the brain-damage factor was determined by computing the appropriate t ratio and by determining the proportion of cases in which the brain-damaged children performed less adequately than their matched controls. The brain-damaged children performed significantly less well than the control children on all the tests, with differences between the 2 groups occurring more frequently on the tests of language functions than on other testing procedures. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Electrical properties of high-κ gate dielectrics: Challenges, current issues, and possible solutions

High-κ gate dielectrics like HfO₂ and HfSiO(N) are considered for the replacement of SiO₂ and SiON layers in advanced complementary metal–oxide–semiconductor (MOS) devices. Using these gate oxides allows indeed to drastically reduce the leakage current flowing through the device, as required by the specifications of the International Technology Roadmap for Semiconductors. However, major problems remain to be solved before the possible use of high-κ gate dielectrics in integrated circuits. The purpose of this paper is to give an overview of the challenges and issues pertaining to high-κ-based devices. Several issues are discussed in detail, like flat-band and threshold voltage control, carrier mobility degradation, charge trapping, gate dielectric wear-out and breakdown, and bias temperature instabilities. Our current understanding of these issues is presented, with an emphasis on the relationship between the material properties of the gate stack, and the electrical properties of the devices. The combination of metal gates with high-κ gate dielectric appears to be a promising solution for the further scaling down of CMOS devices.     

Generality and behavioral correlates of cognitive styles.

Factorial confirmation of 2 cognitive styles, defined as relationships between abilities within individuals, was sought in the within-individual variations of task performances. The cognitive styles, 1 termed "Conceptual versus Perceptual-motor Dominance," the other, "Strong versus Weak Automatization," were factorially isolated in each of 2 samples of adult normal males, and in 1 sample of adolescent male and female twins. The results are similar to those obtained by British factor analysts using hierarchical group factor method. Examination of the relationships of the factors to education and occupational levels in the adult normals revealed that the Strong Automatizers had higher occupational levels than the Weak Automatizers although the 2 groups of Ss did not differ in general intelligence or education. (35 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

双色红外探测器研究

为适应遥感、遥测及精确制导技术的发展,我们已研制出一定性能的CdS/HgCdTe(0.3～0.5μm/3～5μm)、Si/InSb(0.3～1.05μm/3～5μm)、Si/HgCdTe(0.3～1.05μm/3～5μm)、HgCdTe/LiTaO_3(3～5μm/8～14μm)、HgCdTe/HgCdTe(3～5μm/8～14μm)等多种双色红外探测器。其中HgCdTe/HgCdTe(3～5μm/8～14μm)光导双色探测器的峰值探测率D~*(5.1,980,1)=2.1×10~(10)cmHz~(1/2)/W,D~*(9.8,980,1)=8.1×10~9cmHz~(1/2)/W, 峰值响应率R(5.1,980,1)=1.3×10~4V/W,R(9.8,980,1)=373V/W。文中介绍了双色探测器的设计、结构、制备及器件的性能水平。     

煤粉灰分成渣特性对高炉喷吹煤粉性能的影响

通过FactSage热力学分析软件对喷吹煤粉灰组分的成渣特性进行预测,并且对直吹管内煤粉及喷枪堵塞物取样,进行微观分析,得出以下结论:1)高炉喷吹煤粉结渣特性皆由碱性物质引起,并且与成渣四元系CaO-Al2O3-Si O2-MgO中的CaO含量正相关;2)为保证成渣特性温度在1 650℃,CaO含量在CaO-Al2O3-SiO2-MgO成渣四元系中不超过10%;3)尽可能在保证烟煤、瘦煤等变质程度较低煤粉的粒度74μm的情况下,减少2μm的微粒颗粒含量。     

水性聚氨酯的合成、性能及应用进展

总结并讨论了水性聚氨酯的合成技术,包括单组分和双组分系统,并介绍了水性聚氨酯的几种共聚改性方法;讨论了水性聚氨酯的性能要求,包括稳定性、耐水性及机械性能等;概述了水性聚氨酯的应用;最后介绍了水性聚氨酯的现状、存在问题及前景.     

Leakage flux saturation effects on the transient performance of wound-rotor induction motors

The prediction of induction machine performance has traditionally been based on the constant parameter models. This approach was later replaced by considering saturation in the main flux paths. However, such models have not been sufficiently accurate for certain transient conditions such as on-line starting and short-circuit. So, an accurate study of their performance should necessarily consider the magnetic saturation effect both in the main and leakage flux paths. In this paper, an experimental procedure to determine the machine parameters and saturation characteristics is adopted. The adopted experimental procedure facilitates the measurement of both stator and rotor leakage reactance saturation characteristics. Two models of saturated induction motors are developed to predict the transient performance of a laboratory wound-rotor induction motor. The results calculated by the proposed models considering and ignoring the leakage flux saturation are compared with the experimental results. The model that considers saturation in the leakage flux paths produces more accurate transient responses.