济钢中板厂加快技术创新的对策

本文通过对中板厂近年来技术改造后工艺装置和技术水平的分析，并结合中国加入WTO后对中国钢铁企业面临全球化市场竞争严峻性的认识，提出了中板厂在实现高产生产模式后，应加快技术创新的步伐，尽快完成由高产向优质、多品种、低消耗的高效化生产模式转化的主导思想、措施及建议。     

Focal segmental glomerulosclerosis in primates infected with a simian immunodeficiency virus

Focal and segmental glomerulosclerosis (FSG) with endothelial tubuloreticular inclusions (TRIs) is the typical lesion of human HIV-associated glomerulopathy. Autopsy studies showed the presence of FSG in 3 of 15 macaques dying 15-120 weeks after experimental infection with a simian immunodeficiency virus (SIVMne). Ultrastructural studies generally revealed numerous endothelial TRIs (also present in normals), mesangial expansion, and evidence of mesangial cell injury. One additional animal had a small-vessel polyarteritis with a proliferative and focally crescentic glomerulonephritis; seven animals had mild, multifocal interstitial nephritis. All animals had documented viremia after infection; 14 of 15 developed antibodies to SIV postinoculation. Additional postmortem findings included severe enterocolitis, encephalitis, and opportunistic infections. In contrast, autopsy studies of macaques infected with a type D simian retrovirus (SAIDS-D/Washington, SRV-2) for similar periods of time (n = 40) showed no evidence of FSG. One SRV-infected animal had a mild proliferative glomerulonephritis. These studies indicate SIV-infected primates may provide a relevant model for study of human HIV-associated nephropathy. They also indicate the variable pathology that can be seen in primate infections of distinct retrovirus types, each of which produces a simian immunodeficiency state that resembles human AIDS.     

高职教育网上成绩考核系统的总体设计

本文对网上成绩考核系统进行了总体设计.其中,设计了校园网的网络结构模型、网上成绩考核系统的模块结构及其数据库和数据表.     

4-氰基苯甲酸酐的合成

以偏苯三甲酸酐和氯化亚砜为原料 ,其摩尔比为 1:1 2 ,在回流状态下首先合成中间体 4 -氯甲酰基苯甲酸酐Ⅱ ,产率可达 98%。Ⅱ经过胺化、减压脱水制得 4 -氰基苯甲酸酐 ,其沸点为 175～ 180 C/ 0 2 6KPa ,各反应物摩尔比为n (Ⅱ ) :n (NH3 ) :n (P2 O5) =1 0 :4 7:2 1。通过红外分析、1H -NMR分析及元素分析证明 ,所得到的化合物即为目标物。     

采用信息融合技术的IR／MMW复合导引头的目标跟踪

从误差测量环节入手，基于IR／MMW双模结构，采用信息融合处理技术提高其估计跟踪精度，最终达到降低制导误差，提高武器性能的目的，仿真结果验证了该方法的有效性。     

Ti-23Al-14Nb-3V合金氩弧焊接头的显微组织及其力学性能

研究了预热对Ｔｉ－２３Ａｌ－１４Ｎｂ－３Ｖ合金焊接性，特别是对消除氩弧焊冷裂纹的作用以及对接头显微组织和力学性能的影响。结果表明，焊前预热可有效降低该合金的冷裂倾向。经预热处理后，焊缝区的结晶层状线消失，热影响区的硬度峰得到缓和，整个焊缝的显微硬度分布趋于均匀，但焊缝区的枝晶发生粗化，热影响区有所扩大。焊件接头的拉伸试验表明，预热可使焊缝区的接头强度系数增加，但无论预热与否，接头强度均低于母材强度，且不显示宏观塑性。     

我国ABS树脂供需分析及发展建议

介绍了ABS树脂的主要生产方法 ,分析了我国ABS树脂的生产消费状况和市场前景 ,提出了发展我国ABS树脂生产的建议。     

苯和甲苯差分吸收光谱方法的实验室测量研究

本文介绍了差分光学吸收光谱法(DOAS)测量大气污染气体浓度的基本原理。DOAS方法就是利用氙灯发出的紫外—可见光，经望远镜准直后再经过一段距离的传输，由望远镜来接收．在传输中，由于各种不同的分子在不同的波段对光有不同的吸收特征，使光谱具有了污染物的特征，再通过与光源发出的光进行比较，反演这些气体在大气中浓度．我们将DOAS方法应用在监测有机物上，在分析光谱的过程中，应用多项式拟合和最小二乘法，从而精确地从测量光谱中来反演出大气中污染气体的浓度．文中用DOAS方法测量了苯和甲苯的样品，并分析了结果，结果和理论吻合．可为环境中有机污染物监测提供可靠的方法。     

Use of Warranties on Highway Projects: A Real Option Perspective

Since the introduction of warranty provisions in federal highway jobs, more and more state departments of transportation (DOTs) have considered the use of such provisions to protect their initial investment. This paper describes the pros and cons of warranty contracting in highway construction based on a survey of warranty practices in the United States. In particular, the need for state DOTs to buy a warranty for a well-built project is questioned. As an alternative, this paper introduces the warranty option, which gives the DOT the right to buy a warranty only if it becomes necessary at the end of construction. This option is exercised if the performance on site warrants it. This paper describes the mechanics of the warranty option and its advantages over the conventional warranty. A bid evaluation model is also developed for the warranty option approach.