几种无损检测技术在防渗墙质量检测中的应用

利用地质雷达、超声电视、视频电视和高密度弹性波CT等几种无损检测技术,对两个国家重点水利工程(西霞院反调节水库坝基和长江马鞍山河段一期防渗工程)的防渗墙进行了检测,通过对检测成果的分析,总结出每种无损检测技术在检测防渗墙中的优点及局限性:地质雷达检测防渗墙对内部缺陷情况可以进行定性解译,但定量测量不能满足要求;井下电视系统优点是通过超声波成像、视频成像,成果形象、直观可靠,但需要造孔;高密度弹性波CT检测防渗墙质量可反映墙体介质分布的均匀性,但目前软件只能满足一般性数据处理;超声波速CT成像技术能在不同深度位置将不同声速用不同颜色显示出来,成果一目了然,但图像颜色比较单一,相邻声速范围呈现的色彩区分较困难。     

内桥CT极性接错导致变压器差动保护动作的事故分析

本文对内桥CT极性接错导致变压器差动保护动作的事故进行了深入分析,结合系统运行方式,通过参数计算,找出事故原因,缩短了排除故障的处理时间。     

关于GB50010-2002中叠合式板类受弯构件几个问题的探讨

通过对现行混凝土结构设计规范(GB50010-2002)中叠合式受弯构件的正截面抗裂验算、受力类型分类、一阶段受力叠合板施工阶段临时支撑数量等相关问题进行讨论。对叠合式受弯构件的抗裂验算标准及一阶段和两阶段受力的叠合板类构件的分类方法提出了改进建议,并对几种不同类型底板的一阶段受力叠合板施工时临时支撑的间距提出了具体数值,可供施工时参考。     

计算机技术在煤炭检测管理系统中的应用

煤炭检测是按照一定标准对煤炭进行的化验和分析,检测的结果是用来确定煤炭品级的科学依据。煤炭检测管理系统是一种依靠信息化为基础的信息汇总技术,其原理是依靠信息化的手段为煤炭检测管理专门制定的一套较为严格的工作流程的总和,这样的系统能提高煤炭检测工作的效率。同时软件能够对检测结果进行一定的智能分析。本文对这个系统的设计和开发进行了较详细的介绍。     

松花粉中水不溶性膳食纤维的测定条件研究

通过正交试验,确定了中性洗涤剂法测定松花粉中水不溶性膳食纤维的最佳条件,测定了不同品种松花粉中水不溶性膳食纤维的含量。     

64排CT在糖尿病下肢动脉硬化闭塞症中的应用

目的:探讨64排CT在糖尿病下肢动脉硬化闭塞症中的应用.方法:选择我院收治的糖尿病下肢动脉硬化闭塞症患者86例,先进行64排CT扫描(CTA),后再进行数字减影检查(DSA),比较两种方法诊断的准确性和血管病变检查情况.结果:CTA对下肢血管病变准确范围、部位等显示清晰.其检测的敏感性显著高于DSA,P<0.05.且前...     

Tissue Engineering and Regenerative Medicine in Pediatric Urology: Urethral and Urinary Bladder Reconstruction

In the case of pediatric urology there are several congenital conditions, such as hypospadias and neurogenic bladder, which affect, respectively, the urethra and the urinary bladder. In fact, the gold standard consists of a urethroplasty procedure in the case of urethral malformations and enterocystoplasty in the case of urinary bladder disorders. However, both surgical procedures are associated with severe complications, such as fistulas, urethral strictures, and dehiscence of the repair or recurrence of chordee in the case of urethroplasty, and metabolic disturbances, stone formation, urine leakage, and chronic infections in the case of enterocystoplasty. With the aim of overcoming the issue related to the lack of sufficient and appropriate autologous tissue, increasing attention has been focused on tissue engineering. In this review, both the urethral and the urinary bladder reconstruction strategies were summarized, focusing on pediatric applications and evaluating all the biomaterials tested in both animal models and patients. Particular attention was paid to the capability for tissue regeneration in dependence on the eventual presence of seeded cell and growth factor combinations in several types of scaffolds. Moreover, the main critical features needed for urinary tissue engineering have been highlighted and specifically focused on for pediatric application.     

5-Fluorouracil Treatment of CT26 Colon Cancer Is Compromised by Combined Therapy with IMMODIN

Due to the physiological complexity of the tumour, a single drug therapeutic strategy may not be sufficient for effective treatment. Emerging evidence suggests that combination strategies may be important to achieve more efficient tumour responses. Different immunomodulators are frequently tested to reverse the situation for the purpose of improving immune response and minimizing chemotherapy side effects. Immodin (IM) represents an attractive alternative to complement chemotherapy, which can be used to enhance the immune system after disturbances resulting from the side effects of chemotherapy. In the presented study, a model of CT26 tumor-bearing mice was used to investigate the effect of single IM or its combination with 5-fluorouracil (5-FU) on colon cancer cells. Our results highlight that the beneficial role of IM claimed in previous studies cannot be generalised to all chemotherapeutic drugs, as 5-FU toxicity was not increased. On the contrary, the chemotherapeutic anti-cancer efficacy of 5-FU was greatly compromised when combined with IM. Indeed, the combined treatment was significantly less effective regarding the tumour growth and animal survival, most probably due to the increased number of tumour-associated macrophages, and increased 5-FU cytotoxic effect related to kidneys and the liver.     

基于移动终端的考研辅助应用的设计与开发

本文为了帮助准备考研的学生应对获取招生信息和备考资料的难题,处理在考研准备过程中的个性化问题,设计了一份调查问卷.根据363份有效回执,从多所不同层次院校和不同专业的本科生中,收集关于考研意愿、对考研辅助APP的认识和期待等相关信息,依据对所得信息的分析,设计了"首页""资讯""学习""我的"四个页面,为各页面初步开发...     

废水生物处理系统运行状况的评价(下)

废水生物处理系统运行时,要经常对系统的运行状况进行观察,当发生异常时,及时加以调整,达到系统长期稳定地达标运行和节省运行费用的目的。介绍了通过巡视、生物相观察、测定柯泥的性状、水质的理化指标以评价系统运行状况的方法。[编者按]