Fabrication of Ti2SnC-MAX Phase Blended PES Membranes with Improved Hydrophilicity and Antifouling Properties for Oil/Water Separation

In this research work, the Ti₂SnC MAX phase (MP) was synthesized via the reactive sintering procedure. The layered and crystalline structure of this MP was verified by SEM, HRTEM, and XRD analyses. This nano-additive was used for improvement of different features of the polyethersulfone (PES) polymeric membranes. The blended membranes containing diverse quantities of the MP (0–1 wt%) were fabricated by a non-solvent-induced phase inversion method. The asymmetric structure of the membranes with small holes in the top layer and coarse finger-like holes and macro-voids in the sublayer was observed by applying SEM analysis. The improvement of the membrane’s hydrophilicity was verified via reducing the contact angle of the membranes from 63.38° to 49.77° (for bare and optimum membranes, respectively). Additionally, in the presence of 0.5 wt% MP, the pure water flux increased from 286 h to 355 L/m² h. The average roughness of this membrane increased in comparison with the bare membrane, which shows the increase in the filtration-available area. The high separation efficiency of the oil/water emulsion (80%) with an improved flux recovery ratio of 65% was illustrated by the optimum blended membrane.     

基于VHDL的数字密码锁的设计与实现

数字密码锁主要完成上锁、密码输入、密码核对、开启电锁、密码修改等功能.数字密码锁的设计电路主要包括11个模块,各模块由相应的VHDL程序具体实现并分别进行了MAX＋PLUSⅡ时序仿真.最后,在MAX＋PLUSⅡ环境下进行了整体电路的模拟仿真,结果表明,整个设计满足要求.     

VRML及其在远程多媒体教学系统中的应用

虚拟现实在当今国际上是一个倍受关注的课题,ＶＲＭＬ作为其重要的开发工具,在社会生活的诸多领域得以广泛地应用。本文重点介绍了虚拟现实技术的特征和发展现状,虚拟现实建模语言ＶＲＭＬ的基本概念、特色功能及其应用的范围。在此基础上,论述了ＶＲＭＬ在现代远程多媒体教学系统中的应用途径和方法,并通过用插值器操作对象、构造视点动画等方法,结合三维动画制作软件设计了一个切实可行的动态模型实例,很好地实现了远程教学过程中的抽象教学内容具体化,进而阐明虚拟现实建模语言ＶＲＭＬ在未来生活中必将得到多样化的应用。     

多媒体课件的设计制作与教学实验的研究

介绍使用3DSMAX和FlashMX制作电子皮带秤多媒体课件的方法。该课件最终做成的三个nash文件分别展示了电子皮带秤的仪器外观、结构和测量过程，促进了教学的互动。     

一种视频瞄准具的研究

研究了一种视频瞄准具,其结构组成包括由光学镜头、图像传感器CCD以及皮卡导轨构成的图像采集系统和由分划线产生器、控制面板、显示器以及电源变换模块构成的显示系统;瞄准精度为1mil,瞄准距离可达到15～25m;应用视频叠加技术,以MAX7456为核心产生电子分划线.实验结果表明,该瞄准具可准确地叠加电子分划线、显示清晰的瞄准目标图像,具有瞄准实时、操作简便、灵活可靠等特点.     

Pressure-enforced plasticity in MAX phases: from single grain to polycrystal investigation

Ti₄AlN₃, Ti₃AlC₂ and Ti₃Al_0.8Sn_0.2C₂ MAX phases were plastically deformed at room temperature (RT) under gaseous confining pressure. Microstructures of as-grown and deformed samples are carefully analysed using scanning electron microscopy (SEM), atomic force microscopy (AFM) and transmission electron microscopy (TEM). It is demonstrated that high level of plastic deformation can be reached under confining gas pressure; the later suppresses the brittle failure at RT to the profit of plasticity. Multiscale characterization techniques are shown to provide a unique insight into all the scales of the plastic deformation; in particular, the effect of the mesoscale. Indeed, grain shape and orientation relative to the compression axis are shown to play a key role in the deformation process, intergranular stresses leading to a complex stress field in the polycrystalline samples. The TEM results show that dislocation activity highly depends on the grain orientation. The observation of dislocation entanglements unambiguously demonstrates that dislocations may be organized in such a configuration so that their glide in the basal plane can be hindered when deep plastic regime is reached.     

大豆糖蛋白的结构研究

应用NaClO2-HOAc提取结合层析柱提纯, 从大豆细胞壁物质(膳食纤维)中分离出PRF3纯组分。这是一种富含羟脯氨酸的糖蛋白, 本文对其结构特征作详尽剖析。结果表明, PRF3多糖部分的主链结构是由β(1→4)糖苷键连接的半乳聚糖,主链通过3-C分支点连接由α(1→3)键连的低聚阿拉伯糖侧链, 多糖与多肽之间通过HPr-Ara和Ser-Gal糖苷键连接在一起。     

利用UG和3DS MAX的结合实现冲模三维虚拟动态装配

利用UG建立了冲模装配体及其零件的三维实体模型,结合3DSMAX,从后往前制作拟实动画,把冲模装配的过程进行了三维动态处理．实现了冲模三维虚拟动态装配,利用这一方法能保证冲模设计的准确性,同时可指导装配轻松地完成冲模组装．     

家居智能Web 服务的SOA 框架

为增强智能家居的个性化与智能化水平, 提出由资源层、适配层以及感知应用层组成的智能家居体系结构。建立了家居设备操控的原子Web 服务, 并基于Web 服务组合形成家居智能的SOA(Service-OrientedArchitecture)框架。实验结果表明, 该方法可对源于不同智能家居规范及不同组网模式中的设备统一管理和操控, 可为智能服务开发商与家居设备供应商构建协作平台, 降低双方数据交互的难度, 从而在自身领域内更好地发展智能家居服务。     

光声检测用半导体激光器温度控制电路

介绍了用于光声检测系统的稳定和控制DFB激光器温度的基于MAX1978的温度控制电路,采用10 K负温度系数的电阻做温度传感器,TEC做温度控制器件。测试结果表明,该电路的温度设定响应时间小于10 s,温度稳定的精度优于0.02℃。