摘要：The rapid endothelialization of tissue-engineered blood vessels(TEBVs) can effectively prevent thrombosis and inhibit intimal hyperplasia. The traditional Chinese medicine ingredient icariin is highly promising for the treatment of cardiovascular diseases.β-cyclodextrin sulfate is a type of hollow molecule that has good biocompatibility and anticoagulation properties and exhibits a sustained release of icariin. We studied whether icariin-loaded β-cyclodextrin sulfate can promote the endothelialization of TEBVs. The experimental results showed that icariin could significantly promote the proliferation and migration of endothelial progenitor cells; at the same time, icariin could promote the migration of rat vascular endothelial cells(RAVECs). Subsequently,we used an electrostatic force to modify the surface of the TEBVs with icariin-loaded β-cyclodextrin sulfate, and these vessels were implanted into the rat common carotid artery. After 3 months, micro-CT results showed that the TEBVs modified using icariin-loaded β-cyclodextrin sulfate had a greater patency rate. Scanning electron microscopy(SEM) and CD31 immunofluorescence results showed a better degree of endothelialization. Taken together, icariin-loaded β-cyclodextrin sulfate can achieve anticoagulation and rapid endothelialization of TEBVs to ensure their long-term patency.

摘要：随着建筑技术的日益进步,施工现场的场地布置面临着巨大的挑战。如何合理的进行施工场地的布置关系着安全文明施工,也影响着企业形象。本文主要通过结合BIM技术,进行三维场地布置,进而解决设备安置、材料堆放、设备进场、生活区布置等二维图纸难以解决的问题,并且通过BIM模型进行场地布置工程量计算、施工场地布置资产管理等。

摘要：[目的]在浅水环境下,对波浪中浮体的响应进行求解时,其主要难点在于对有限水深格林函数及其偏导数的准确求解和快速计算。[方法]为此,利用改进的Gauss-Laguerre积分法,提出一种可精确计算有限水深格林函数及其偏导数的方法,结合循环矩阵原理,给出对称性的处理方法和简化的级数求解公式。并将所提方法与其他商业软件计算结果进行对比分析。[结果]结果表明,所提计算方法精确度较高。[结论]该方法可用于准确评估浅水中的浮体运动和波浪载荷。

摘要：由于焊接机器人系统的特殊性,目前尚没有通用或专用的软件进行通讯;文章介绍了用VC++实现的与焊接机器人视觉跟踪系统进行以太网通讯的专用软件,完整详细地介绍了软件的设计流程,对其中关键的非阻塞SOCKET程序、单文档多视图和框架到文档的消息路由等三部分作了详细的说明并提供了部分关键代码,同时强调了在数据流控制上的数据封装原则和软件设计上的可扩展性;软件经过一段时间的稳定运行,与焊接机器人视觉跟踪系统通讯数据的可靠采集和完整快速的显示切换表明软件设计可行,结果满足实际工程的需要。

摘要：提出用运算跨导放大器和电容（简写ＯＴＡ－Ｃ）实现的ＰＲＢ型带通滤波器。它可以方便地改变中心频率的带宽。对这种滤波器可能的输入电压最大值，以及一些非理想因素的影响进行了初步的讨论。通过计算机辅助分析（简写ＣＡＡ）和分立组件电路的实验，验证了此设计方法的可行性以及建立这种滤波器设计专家系统的可能性。