精密柔索传动技术研究现状及分析

精密柔索传动是一种通过主、从动轮之间有适当预紧的传动介质来实现的挠性摩擦传动方式,具有布局灵活、高精度、轻量化等特点,在多种灵巧性精密机电装置和伺服机构中得到了广泛的应用。本文归纳了柔索传动技术在精密指向机构、人机交互机器人、跑步机器人、灵巧手和微创手术末端器械等方面的应用进展;总结了亟待解决的基础理论和应用研究相关问题,主要包括传动机理研究、伺服系统的应用研究、针对典型应用需求的工程设计方法研究等;最后,对进一步发展精密柔索传动理论分析与工程设计技术提出了建议。     

基于液压变压器的《液压传动》课程研究型教学模式的探讨

液压传动课程是一门理论性和实践性很强的专业课程,为提高教学质量,培养学生对知识的综合应用能力和创新探索的能力,以液压变压器为例对液压传动课程研究型教学模式进行了探讨。通过液压变压器的研究型教学可以促使学生主动学习,灵活运用液压基础知识进行探索创新,培养学生的钻研精神和研究思维,提升液压传动课程的教学效果,提高学生的科学素养。     

实时无隙钢球精密传动空间速度矢模型

针对实时无隙钢球精密传动机构中钢球的空间运动问题,根据微分几何理论,推导出了修正D-H变换矩阵,得到了传动机构钢球上任意一点相对于中心盘和组合行星盘的位置。利用转换机构法和空间几何建模理论,建立了钢球相对于中心盘和组合行星盘的空间相对速度矢模型。分析了传动机构摆线盘槽形角和钢球数对速度矢模型的影响。仿真结果与数值模拟结果的对比分析验证了空间速度矢模型的可靠性。     

无极绳绞车监控保护装置研究

为了实现轨道运输安全管理,解决斜巷运输中同时行车行人的问题,杜绝运输事故,绳绞车上安装监控系统的思路,研究制定技术方案,并介绍方案的各项功能。经过实际运行,该技术方案,并介绍方案的各项功能。可有效实现运输巷道中车辆和人员的监控,落实＂行车不行人,行人不行车＂的规定,煤矿轨道运输的管控由人防上升到技防,提升了轨道运输安全的信息化、智能化管控水平。     

Carbon nanotube–polyaniline composites

The last decade has seen a growing interest in hybrid electrically conducting nanocomposites. This article aims to provide a detailed overview of the present status of research in carbon nanotube–polyaniline (CNT/PANI) composites, from processing to structural and property evaluations. CNT/PANI are synthesized by electrochemical and chemical processing. When chemical methods are used, the main challenge is to obtain processable CNT/PANI in the emeraldine salt (ES) form composites. Stable dispersions of ES–CNT in organic media are prepared using the post doping method, inverse emulsion polymerization, or ex situ polymerizations. On the contrary, stable water dispersions of CNT/ES are prepared using hydrophilization of a preformed CNT/ES composite, direct synthesis of micelle–CNT hybrid templates, interfacial polymerization, covalent functionalization of CNT with a water soluble polymer, or using electrostatic interactions between two oppositely charged ES and CNT aqueous colloids. Moreover, the strategies for the synthesis of ternary CNT/PANI composites incorporating noble metal nanoparticles, metal oxide, or graphene sheets are also presented and analyzed in depth. Finally, we give a review of potential applications, including chemical sensors, capacitors, fuel cells and electronic devices.     

Atom transfer radical polymerization (ATRP): A versatile and forceful tool for functional membranes

The progress in atom transfer radical polymerization (ATRP) provides an effective means for the design and preparation of functional membranes. Polymeric membranes with different macromolecular architectures applied in fuel cells, including block and graft copolymers are conveniently prepared via ATRP. Moreover, ATRP has also been widely used to introduce functionality onto the membrane surface to enhance its use in specific applications, such as antifouling, stimuli-responsive, adsorption function and pervaporation. In this review, the recent design and synthesis of advanced functional membranes via the ATRP technique are discussed in detail and their especial advantages are highlighted by selected examples extract the principles for preparation or modification of membranes using the ATRP methodology.     

Dendrimer as nanocarrier for drug delivery

Dendrimers are novel three dimensional, hyperbranched globular nanopolymeric architectures. Attractive features like nanoscopic size, narrow polydispersity index, excellent control over molecular structure, availability of multiple functional groups at the periphery and cavities in the interior distinguish them amongst the available polymers. Applications of dendrimers in a large variety of fields have been explored. Drug delivery scientists are especially enthusiastic about possible utility of dendrimers as drug delivery tool. Terminal functionalities provide a platform for conjugation of the drug and targeting moieties. In addition, these peripheral functional groups can be employed to tailor-make the properties of dendrimers, enhancing their versatility. The present review highlights the contribution of dendrimers in the field of nanotechnology with intent to aid the researchers in exploring dendrimers in the field of drug delivery.     

基于RFID的远程物资管理系统

提出了基于RFID技术的远程物资管理系统,并对其进行分析与设计。     

浅谈哈石化航煤管道运输应急响应

航煤的性质决定了航煤管道运输事故的性质--危害大、影响大。本文论述了航煤管道泄漏时应急响应过程,浅述了航煤管道应急响应现存问题及解决方案,如能实施,对保障哈石化的稳定发展具有重要的现实意义。