氨纶弹性纤维

本文论述了氨纶弹性纤维的国内外生产发展概况和市场需求．对氨纶生产的树脂合成和干法纺丝、湿法纺丝、化学反应法纺丝进行了评述，指出了发展氨纶纤维的必要性．     

基于改进的显式算法对叶片模具翻转架的失效调查

为对风电叶片模具翻转架进行失效调查,使用改进的显式接触算法对翻转座进行仿真分析。首先,对翻转架进行受力计算,选中6支座中的危险部件进行实体有限元建模。模型中,基于经典显式动力学算法使用重心位置映射的方法对网格单元的间隙变量进行改进,并据此进行网格仿真,最后得到翻转座受力云图。结果显示：施加在液压缸推杆的交变载荷诱发了推杆中部的断裂,且改进算法进一步减少了单元聂动,在计算稳定性上提高13%,计算次数提高6%,为大型部件的接触计算提供理论与应用借鉴。     

C语言教学中的几点改进建议

根据近些年的教学经验和目前C语言教学中普遍存在的问题，作者从激发学生学习兴趣入手，在教学手段、教学内容、作业布置和考核方式几方面提出了几点改进建议，使教师的教和学生的学同时得到提高。     

A Novel Molecularly Imprinted Core?CShell Chemiluminescence Sensor: Preparation and Pendimethalin Recognition

Novel molecularly imprinted core?Cshell microspheres were synthesized using hollow silica microspheres as the core. Because of the molecularly imprinted core?Cshell microspheres, the effective binding sites at the surface of the shells were sharply increased; and, the recognition capability for template molecules was greatly improved. Based on this, a novel chemiluminescence sensor was established and successfully applied in the detection of trace pendimethalin in foodstuffs. The proposed sensor exhibited excellent selectivity, good sensitivity and simple operation. High throughput sample detection was realized with satisfactory results.     

Influence of the carboxymethyl chitosan anti-adhesion solution on the TGF-β1 in a postoperative peritoneal adhesion rat

The aim of this paper was to investigate the effect of carboxymethyl chitosan anti-adhesion solution on prevention of postsurgical adhesion. Forty adult male Wistar rats were randomly divided into three groups: 0.9 % normal saline solution (group A), hyaluronic acid gels (group B) and carboxymethyl chitosan anti-adhesion solution (group C). The animals were treated with normal saline, hyaluronic acid gels or carboxymethyl chitosan anti-adhesion solution at the time of surgery. After 2 or 3 weeks, the degree of adhesions and histological effects were determined. The adhesions in groups B and C were significantly decreased, and the levels of TGF-β₁ and hydroxyproline in group C were significantly lower than that in group A (P < 0.05). The histopathology in group C showed fewer inflammatory cells and fibroblasts. Carboxymethyl chitosan anti-adhesion solution can effectively prevent postoperative adhesion which is a promising drug delivery system in the context of postsurgical anti-adhesion.     

一种基于小波变换结合反向迭代修正的VQ图象压缩编码方法

将反向迭代法引入对ＶＱ（矢量量化）编码误差进行修正，从而使建立在小波变换基础上的ＶＱ编码方法的重建图象质量得到改善，使信噪比（ＳＮＲ）提高了３～８ｄＢ。对于与训练集内样本相差较大的图象在压缩比相同的条件下，改善重建图象的效果尤为明显。     

一种基于电压瞬时值反馈的数字化逆变电源的研究

介绍一种基于数字PID控制算法的电压瞬时值反馈逆变电源，分析了其控制算法及控制框图，仿真表明该系统具有良好的输出响应特性。     

高温退火非掺杂磷化铟制备半绝缘材料

对液封直拉(LEC)非掺磷化铟(InP)进行930℃ 80h的退火可重复制备直径为50和75mm的半绝缘 (SI)衬底.退火是在密封的石英管内纯磷(PP)或磷化铁(IP)两种气氛下进行的.测试结果表明IP-SI InP衬底具有很好的电学性质和均匀性,而PP-SI的均匀性和电学参数都很差.在IP-SI样品的PL谱中出现与深缺陷有关的荧光峰.光激电流谱的测量结果表明:在IP气氛下退火获得的半绝缘磷化铟中的缺陷明显比PP-SI磷化铟的要少.并对退火后磷化铟中形成缺陷的机理进行了探讨.     

埋地排水用钢带增强聚乙烯螺旋波纹管产品标准与工艺质量控制

介绍了CJ/T225—2006《埋地排水用钢带增强聚乙烯(PE)螺旋波纹管》产品标准与产品生产工艺及质量控制的关系;产品标准的基本要求、特点及其与GB/T19472.2—2004《埋地用聚乙烯(PE)结构壁管道系统第2部分:聚乙烯缠绕结构壁管材》的比较;产品的生产工艺及质量控制要点。     

埕岛油田油层污染及减少污染研究

埕岛油田是胜利油田在浅海上的重点勘探开发区，开展并做好油层保护工作具有十分重要的意义。埕岛油田馆陶组油层存在污染因素，如岩性疏松，有微粒运移；粘土含量高，遇水膨胀并分散，使渗透率降低等。造成污染的来源主要是钻井液。针对这些情况，我们开展了油层污染及减少污染的研究，选择适合海上使用的海水钻井液的配方，并使用超细碳酸钙作为屏蔽暂堵剂，对保护油层和改善钻井液性能有显著的效果。