Durable and Recyclable Superhydrophobic Fabric and Mesh for Oil–Water Separation

The authors report durable and recyclable nanocomposite superhydrophobic coatings on two different substrates of fabric and mesh as prepared by titania nanoparticles and polydimethysiloxane (PDMS). The felted wool fabric and the steel mesh are initially coated with a thin layer of PDMS, which is followed by the deposition of nanocomposite coating of titania nanoparticles embedded in PDMS. The dual surface modification of two kinds of substrates generates highly hydrophobic surface character, which is retained after durability performance as measured in ultrasonication, sand, and emery paper abrasion tests. Oil–water separation experiments are performed using water mixtures with four oils, that is, n‐hexane, toluene, kerosene, and diesel to ensure the industrial applications of prepared composite materials. Moreover, nanocomposite coatings are tested for several cycles of oil–water separation in harsh conditions such as hot water, sodium chloride, and hydrochloric acid. The adopted approach improves the separation performance by inducing durability of the prepared nanocomposite coatings along with introducing recyclable character.     

油品含水率智能化检测系统设计

针对当前成品油含水率实时检测的实际需求,提出一种基于密度检测原理的非接触式成品油含水率及油位智能化检测系统的设计方案,应用超声波及差压传感器对成品油库内的油品含水率进行实时非接触式的全自动检测。该系统基于可编程片上系统进行设计,用于实现油位、油压和现场温度的测量以及实现测量结果的显示、人机交互等功能。     

坦克运动参数自动检测装置设计

针对坦克射击训练缺乏有效的运动参数检测手段、训练成绩评定主观随意性大等问题,设计了坦克运动参数自动检测装置。该装置采用传感器及计算机技术,实时监测坦克在射击过程中的运动参数。该装置采用一套柔性支架可在多种型号的坦克上安装,在野外行车环境下可靠性高,能够不受强光照射、坦克行驶的扬尘、坦克电源电压波动大等恶劣因素的影响。     

OADM设备分布式网络管理接口的设计和实现

介绍了基于OADM网元管理系统的CORBA分布式网络管理接口的设计,并给出推模式下传递结构化事件的具体实现过程.在遵循TMF814接口集的网络管理系统中,该网元管理系统及其网络管理接口能够实现设备的本地管理和分布式网络管理,有助于多种设备共存的光通信网络实现统一管理.     

新型轮胎包装机的设计

为提高轮胎的包装质量,设计了采用透明热塑薄膜进行轮胎包装的轮胎包装机.文中介绍了轮胎包装机的工作原理、控制过程以及各机构的主要特点.     

Interaction of Gelatin and Sodium Dodecyl Benzene Sulphonate at Oil and Water Interfaces

Abstract

Interaction between sodium dodecyl benzene sulphonate (SDBS) and gelatin ivas studied in relation to emulsification behaviour and emulsion stability. We chose two different oils to study influences of oil phase characteristics, namely, tricresyl phosphate (TCP) as an oil with polar and slightly hydrophilic nature, and n-dodecane (n-C₁₂) as its apolar contrast. Our interfacial tension measurements showed that both TCP and n-C₁₂ give critical values (i.e., cac and cmc) very close to I hose of surface tension measurement. This result indicates that the complexation behaviour in bulk solution is independent of the presence or the nature of the oil phase. Absolute tension values above the cmc and slope value at the cmc in gelatin free systems, however, imply SDBS’s weaker adsorption to TCP than to n-C₁₂ Our emulsification results for the TCP system revealed the existence of an optimal point for emulsion stability in the SDBS concentration region between the cac and the cmc. Above this point, emulsion stability deteriorates remarkably. The behaviour is in line with our findings from the dynamic sorption experiments (ellipsomelry, TIRF, and SPR) reported elsewhere, which showed a rapid desorption of gelatin from the hydrophobic surfaces above the cac. The results suggest that the adsorption of gelatin/surfactant complexes at the interface is a key factor for stability of the polar oil emulsion system. Contrary to that, the n-C₁₂ system did not show any deterioration, even above the cmc, which is presumably due to a strong double layer effect from the firmly adsorbed layer of SDBS at the interface.     

针织无缝内衣机联网系统的设计与实现

针对针织无缝内衣机设备联网的功能需求,提出了一种针织设备联网的总体结构框架,设计了基于无线网络的针织无缝内衣机联网设备终端系统.采用ARM Cortex-A8微处理器和剪裁后Linux操作系统为系统基础平台,分析和归纳针织无缝内衣机的工艺特点和设备数据类型,制定了设备联网接入机制和数据通信协议,研究了服务器和设备间的数据交互流程、通信安全机制及其异常处理机制.在完成设备侧硬件设计和软件开发的情况下,用实验室搭建的机联网平台测试结果验证了机联网设备终端系统设计方案的正确性和可行性.     

Utilization of Peroxide Reduction Reaction at Air–Liquid–Solid Joint Interfaces for Reliable Sensing System Construction

The utilization of hydrogen peroxide (H₂O₂) cathodic reaction is an ideal approach to develop reliable biosensors that are immune to interferences arising from oxidizable endogenous/exogenous species in biological solutions. However, practical application of such a detection scheme is limited due to the significantly fluctuating oxygen levels in solutions, as oxygen can be reduced at similar potentials. Herein, this limitation is addressed by developing a novel electrode system with superhydrophobicity‐mediated air–liquid–solid joint interfaces, which allows the rapid and continuous transport of oxygen from the air phase to the electrode surface and provides a fixed interfacial oxygen concentration. Using cathodic measurement of the enzymatic product H₂O₂, the sensing platform is applied to detect glucose, a model analyte, achieving a remarkably high selectivity (≈2% signal modulation due to common biologic interferents), sensitivity (18.56 µA cm^?2 mm ^?1), and a dynamic linear range up to 80 × 10^?3m . The utility of H₂O₂ reduction reaction at triphase interface to achieve reliable sensing platforms is general, and hence has broad potential in the fields of medical research, clinical diagnosis, and environmental analysis.     

供水工程输水隧洞钻爆设计与施工

介绍了采用钻焊法开挖深圳市东部供水工程输水隧洞的掏槽方式,光面爆破参数,装药结构及钻爆作业安排等参数。在近4年的工程实践中,取得了良好的爆破效果和明显的经济效益。     

自动套色系统中误差色标检测光电传感器的设计与实现

针对在凹版印刷中表征套印误差信息的色标信号检测问题.本文依据各颜色画面相对背景色对光能吸收不同的光学原理,利用半透半反光玻片的异面性和光电池光电转换功能,设计和实现了一种色标检测光电传感器.针对光电池光电转换输出信号较弱且非数字性的问题,进行了信号调理.实验结果和现场应用表明,该光电传感器具有结构简单.检测距离远((10±2)mm)、光斑半径小(φ1.5 mm)、灵敏度高、响应速度快(0.2 ms)、性能稳定可靠等优点.     

FMS检测监控实验系统的设计与实现

从开展ＦＭＳ检测监控技术研究的实际需要出发，讨论了建立ＦＭＳ检测控实验系统的必要性。介绍了一个用ＦＭＳ检测监控技术研究的ＦＭＳ检测监控实验系统的基本结构和功能，该系统采用递阶控制的结构形式和模块化的构造方法，可根据不同的研究工作需要进行重新组合，构造出所需要的研究实验环境。     

一种超声波测距系统的设计与实现

设计了一种基于MSP430的超声波测距系统。系统能实时检测汽车尾部与障碍物的距离,根据设定的距离值由蜂鸣器发出不同频率的警报信息反馈给司机,对行车或倒车安全有至关重要作用。该系统具有一定的实用价值。     

The Use of a Floating Electromagnetic Level Gauge in Surface Oil Tanks

A level gauge for measuring the level of oil in vertical surface tanks, which is highly reliable and accurate and has a comparatively simple construction, is described. The construction of the electric circuit of the level gauge and data of an experimental structure and its accuracy characteristics are presented.__________Translated from Izmeritel’naya Tekhnika, No. 5, pp. 43–47, May, 2005.     

Implementation of Karhunen–Loeve expansion for simulation using a wavelet-Galerkin scheme

The feasibility of implementing Karhunen–Loeve (K–L) expansion as a practical simulation tool hinges crucially on the ability to compute a large number of K–L terms accurately and cheaply. This study presents a simple wavelet-Galerkin approach to solve the Fredholm integral equation for K–L simulation. The proposed method has significant computational advantages over the conventional Galerkin method. Wavelet bases provide localized compact support, which lead to sparse representations of functions and integral operators. Existing efficient numerical scheme to obtain wavelet coefficients and inverse wavelet transforms can be taken advantage of solving the integral equation. The computational efficiency of the wavelet-Garlekin method is illustrated using two stationary covariance functions (exponential and squared exponential) and one non-stationary covariance function (Wiener–Levy). The ability of the wavelet-Galerkin approach to compute a large number of eigensolutions accurately and cheaply can be exploited to great advantage in implementing the K–L expansion for practical simulation.     

六棱形油画棒自动包装机料斗的初步设计

为了解决六棱形油画棒自动包装机的落料问题,研究了六棱形油画棒的物料特性和落料要求,借鉴现有文具包装机器的相关结构,初步设计了六棱形油画棒自动包装机的料斗,包括料箱、松料机构、拨料辊等部分,可实现六棱形油画棒的可控落料。     

原油罐底板内部牺牲阳极法阴极保护的设计及应用

对原油4号罐底板仅刷涂料进行防腐蚀,其效果不佳.对产生腐蚀的现象原因进行了分析,发现腐蚀源自涂料施工质量、原油含盐量及贮存温度,其腐蚀机理为电化学腐蚀.参照相关国家标准进行牺牲阳极法阴极保护系统的设计和安装,消除了腐蚀隐患,其设计使用寿命可达10 a以上.     

基于PLC的火腿肠装箱机自动控制系统的设计与实现

火腿肠装箱机是火腿肠自动生产线的关键设备,为了解决火腿肠加工企业火腿肠包装中的问题,详细介绍了基于PLC技术的火腿肠装箱机自动控制系统的设计与实现.     

高性能模糊控制裹包机的感应电动机驱动系统的设计与实现

针对接缝式裹包机的交流调速系统控制精度较差的问题,提出了具有模糊控制器的有限周期控制的感应电动机驱动.由于转矩和磁通是由有限周期控制技术调节,能达到极快转矩响应.将模糊控制器应用于速度控制反馈环节中,使该驱动系统具有高自适应能力,且对参数和工作条件改变是非常的不灵敏.