油井屏蔽暂堵热洗工艺技术的研究与应用

针对韦庄油田地层压力系数低、水敏严重、热洗液漏失污染地层的问题 ,引入屏蔽暂堵工艺 ,克服了常规洗井排水时间长、产量下降等弊端 .该工艺的特点是有效堵漏和易于解堵 .通过对地层伤害机理分析和室内性能研究 ,筛选出一种新型暂堵剂 GYZD,在韦庄油田现场实施 1 0口井 ,工艺成功率达 1 0 0 %,暂堵有效率达 90 %.与以往的热洗效果相比 ,累计减少原油损失 868t,较好地解决了多年困绕韦庄油田因热洗影响产量的问题 ,取得了良好的经济效益     

坚持政治性体现时代性富有创造性--关于高等学校领导班子建设的理论思考

高校领导班子建设是领导班子建设的重要组成部分，是高校党的建设的重要环节，是推动高校改革发展的关键所在。新的历史条件下，高校领导班子建设要坚持政治性，体现时代性，富有创造性，努力把高校领导班子建设成为政治上坚强有力，组织上团结协作，工作上开拓进取，作风上清正廉洁的领导集体。     

钢管压扁矫正过程的计算机模拟

套管生产中，矫直工序决定了套管的形状精度和残余应力，对套管抗挤强度有很大影响．应用有限元分析软件Marc，建立了斜辊钢管矫直机的压扁矫正模型，并对矫直过程进行深入分析．基于试验测量的应力一塑性应变数据，推导了σ-εp关系式，编写了子程序以描述钢管材料的塑性变形特性．对不同压扁量进行数值模拟，比较了现有的压扁量计算理论．建立了钢管压扁矫正的三维模型，计算得到了与二维模型近似的结果．     

GIS局部放电信号及内置传感器检测分析

气体绝缘组合电器(GIS)局部放电不仅激发横向电磁波(TEM),而且会激发横向电场波(TE)和横向磁场波(TM).利用电磁场中的并矢格林函数理论,推导出了GIS中PD信号在任意点激发瞬变电场的计算表达式,在计算GIS中PD激发的电场时,应考虑TEM波和检测频段内所有高次模波的贡献.在实验室GIS模拟装置上,设计了灵敏度及抗干扰能力优于外置传感器的内置传感器,并用天线模型对其进行了频率响应特性分析,最后直接用高参数数字存储示波器测量了由金属突出物缺陷产生的局部放电信号.     

胆源性急性胰腺炎119例诊治体会

目的:探讨胆源性急性胰腺炎的诊断和手术时机,方法:对1995年7月至2005年5月收治的胆源性急性胰腺炎(BAP)119例进行前瞻性分析,随机分为早期手术治疗组43例和保守治疗组76例,结果:入院后1w内行急诊手术43例,死亡3例,治愈40例,保守治疗组76例,晚期手术63例(保守治疗2～3w后),死亡3例,13例未行手术出院,结论:BAP(2w内)一般均可保守治疗,重型胆源性胰腺炎应在发病后3～4w炎症控制良好,病情稳定后再及时手术,可以缩短住院时间,减少并发症,降低手术死亡率。     

信息部门在网络安全工作中的挑战与应对

随着网络技术的飞速发展和广泛应用,网络安全事件日益增多。结合信息安全工作的亲身体会,基于业内的成熟做法及工作经验,从网络黑客案件、恶性病毒、手机无线上网、网络传输音视频文件等几方面论述了信息部门在网络安全工作中面临的挑战,并提出了应对建议。     

对新时期现代企业安全保卫工作的思考

文章结合科学发展现,就如何做好新时期、新形势下的企业安全保卫工作问题,作了探索与思考.     

Simultaneous mineralization of CO2 and recovery of soluble potassium using earth-abundant potassium feldspar

CO2 capture and storage(CCS) is an important strategy in combatting anthropogenic climate change.However,commercial application of the CCS technique is currently hampered by its high energy expenditure and costs.To overcome this issue,CO2 capture and utilization(CCU) is a promising CO2 disposal method.We,for the first time,developed a promising method to mineralize CO2 using earth-abundant potassium feldspar in order to effectively reduce CO2 emissions.Our experiments demonstrate that,after adding calcium chloride hexahydrate as an additive,the K-feldspar can be transformed to Ca-silicates at 800 C,which can easily mineralize CO2 to form stable calcium carbonate and recover soluble potassium.The conversion of this process reached 84.7%.With further study,the pretreatment temperature can be reduced to 250 C using hydrothermal method by adding the solution of triethanolamine(TEA).The highest conversion can be reached 40.1%.The process of simultaneous mineralization of CO2 and recovery of soluble potassium can be easily implemented in practice and may provide an economically feasible way to tackle global anthropogenic climate change.     

聚硫聚氨酯的合成及其热力学性能

以聚硫橡胶(PS)、聚四氢呋喃(PTMG)、二苯基甲烷二异氰酸酯(DPMDI)为原料,制备聚硫聚氨酯(PS/PU)复合材料。研究了G4、G112、G21C不同型号聚硫橡胶及其质量分数对聚硫聚氨酯复合材料结构和热力学性能的影响,进行了红外分析、差示扫描热分析(DSC),通过TGA确立了热降解活化能。结果表明:G4和G21C型聚硫橡胶改性的聚氨酯具有更好的热稳定性能,其降解活化能可达171.36kJ/mol。     

PTC124 targets genetic disorders caused by nonsense mutations

Nonsense mutations promote premature translational termination and cause anywhere from 5-70% of the individual cases of most inherited diseases. Studies on nonsense-mediated cystic fibrosis have indicated that boosting specific protein synthesis from <1% to as little as 5% of normal levels may greatly reduce the severity or eliminate the principal manifestations of disease. To address the need for a drug capable of suppressing premature termination, we identified PTC124-a new chemical entity that selectively induces ribosomal readthrough of premature but not normal termination codons. PTC124 activity, optimized using nonsense-containing reporters, promoted dystrophin production in primary muscle cells from humans and mdx mice expressing dystrophin nonsense alleles, and rescued striated muscle function in mdx mice within 2-8 weeks of drug exposure. PTC124 was well tolerated in animals at plasma exposures substantially in excess of those required for nonsense suppression. The selectivity of PTC124 for premature termination codons, its well characterized activity profile, oral bioavailability and pharmacological properties indicate that this drug may have broad clinical potential for the treatment of a large group of genetic disorders with limited or no therapeutic options.