CMOS有源光电传感器像素采集单元成像质量分析

针对CMOS光电二极管型有源像素采集单元中存在的拖影问题,从像素采集单元的工作原理入手,利用光电二极管的等效电路模型,对像素采集单元的光电转换状态和置位状态进行分析.得出造成拖影的根本原因是光电二极管置位后的电压与上一周期末光电二极管的光生电压有关.     

先进摄影系统（APS）问世

美国柯达公司与日本几家公司经历十余年共同努力，推出一种全新的摄影系统，它是影像科技探索中的划时代突破，为人们带来的是更多方便与乐趣。     

Advanced production scheduling for batch plants in process industries

An Advanced Planning System (APS) offers support at all planning levels along the supply chain while observing limited resources. We consider an APS for process industries (e.g. chemical and pharmaceutical industries) consisting of the modules network design (for long–term decisions), supply network planning (for medium–term decisions), and detailed production scheduling (for short–term decisions). For each module, we outline the decision problem, discuss the specifi cs of process industries, and review state–of–the–art solution approaches. For the module detailed production scheduling, a new solution approach is proposed in the case of batch production, which can solve much larger practical problems than the methods known thus far. The new approach decomposes detailed production scheduling for batch production into batching and batch scheduling. The batching problem converts the primary requirements for products into individual batches, where the work load is to be minimized. We formulate the batching problem as a nonlinear mixed–integer program and transform it into a linear mixed–binary program of moderate size, which can be solved by standard software. The batch scheduling problem allocates the batches to scarce resources such as processing units, workers, and intermediate storage facilities, where some regular objective function like the makespan is to be minimized. The batch scheduling problem is modelled as a resource–constrained project scheduling problem, which can be solved by an efficient truncated branch–and–bound algorithm developed recently. The performance of the new solution procedures for batching and batch scheduling is demonstrated by solving several instances of a case study from process industries.     

XPS and AFM Study of Interaction of Organosilane and Sizing with E-Glass Fibre Surface

Organosilanes are often used in commercial sizings for glass fibres to provide wettability with the resin and promote strong interfacial adhesion to the matrix in a fibre reinforced polymer composite. The silane treatment is introduced as part of a complex deposition from an aqueous emulsion immediately at the spinaret and determines the optimum properties of the cured composite. To understand the interaction of organosilanes contained in sizings for glass surfaces, XPS was used to investigate the adsorption of γ-aminopropyltriethoxysilane (APS) from a simple sizing system containing a polyurethane (PU) film former. It has been found that both APS and the sizing (containing APS and PU) deposits on E-glass fibre surfaces contained components of differing hydrolytic stability. The differences observed in the AFM images of APS coated E-glass fibres before and after water extraction also confirmed that the APS deposit contained components with different water solubility.     

在半导体制造业导入高级规划与排程系统

半导体制造系统的回流、资源高度共享等特征使得仅采用ERP系统已无法满足对生产规划与排程的种种需求.高级规划与排程(APS)系统的出现是为了强化ERP中以传统MRP规划逻辑为主的生产规划与排程功能,以协助规划人员对物料与产能做同步且最有效益的生产规划.APS系统利用先进的信息科技及规划技术,再考虑企业资源限制条件与生产现场的控制与派工法则,规划可行的物料需求计划与生产排程计划,具有同步规划、即时规划、最优规划等特点.对APS功能特色、APS导入时与ERP的衔接问题以及导入后各部门的运作进行了介绍及分析.     

一种新的APS数字式太阳敏感器测姿算法

APS数字式太阳敏感器是卫星运行过程中所需要的姿态测量部件,是目前太阳敏感器的发展方向.APS数字式太阳敏感器在测姿吋需要计算太阳像质心在APS成像面上的位置,常规的质心法在计算时存在着时间上的浪费,尤其当太阳像的面积相对成像面面积较小时,时间浪费尤其明显.本文提出了一种新的太阳像质心快速计算方法,该方法能够大幅度提高质心的求解速度,并且能够保障一定的计算精度.     

对抗主动防护系统的EFP 战斗部设计

为了确立反坦克导弹在战场上的主动地位,采用EFP战斗部对抗主动防护系统。在介绍主动防护系统基本原理的基础上,采用反应时间对比的方法对EFP战斗部对抗主动防护系统的可行性进行了分析。总结了EFP的形成机理与特点,给出了EFP战斗部的设计依据,利用几何相似律设计了串联EFP战斗部,计算出了战斗部的最近起爆距离。该研究可为EFP战斗部进一步的详细设计奠定基础。     

Renewable antioxidant properties of suspensible chitosan–polypyrrole composites

Conductive polymers have the ability to capture radicals and have become in focus for antioxidant applications of food packaging or biomedical applications. Unfortunately, the conducting polymers such as polypyrrole are difficult to suspense in solution after chemical or electrochemical polymerization. Chitosan, as a natural polymer from chitin, can be dissolved in diluted acetic acid solutions. In the present study, composites suspensible in diluted acetic acid solutions have been produced by the chemical polymerization of pyrrole in chitosan solution using ammonium persulfate (APS) as the oxidant. FTIR and UV–Vis measurements did identify an attachment of polypyrrole to chitosan.In order to optimize the activity and stability of the composites, the ratios of APS: polypyrrole: chitosan were analyzed. The chitosan–polypyrrole composites were formed as membranes (coatings); impedance measurements indicated their conductivity to be in the range of 10^?3–10^?7 S cm^?1. The antioxidant (radical scavenger activity) properties were determined by the di(phenyl)-(2,4,6-trinitrophenyl)iminoazanium (DPPH) assay. The radical scavenger activity of the composites was found renewable by means of electrochemical cycling.     

Microstructure and oxidation resistance of a NiCrAlY/Al2O3-sprayed coating on Ti-19Al-10Nb-V alloy

A Ti₃Al (α₂) alloy (Ti-19Al-10Nb-3V, wt%) coated by air plasma spraying (APS) with Ni22Cr10AlY and Ni22Cr10AlY/Al₂O₃ has been tested against cyclic oxidation in air at 850 °C for 10 cycles of 10 h each. Effects of pre-oxidation and cyclic oxidation treatments, both in air, on the microstructure of the single α₂/Ni22Cr10AlY and double coated α₂/Ni22Cr10AlY/Al₂O₃ specimens were investigated by X-ray diffraction (XRD), SEM-EDS and Raman spectroscopy. Several distinct results appear through the cyclic oxidization of the pre-oxidized α₂/Ni22Cr10AlY, namely, elemental diffusion where Ti and Al diffuses from one side and Ni and Cr from the other side, oxygen is found to be present at the support-bond coat interface and a partial reaction of the superficial NiO with α-Al₂O₃ to form the non-protective NiAl₂O₄ takes place. Conversely, pre-oxidation treatment of the double coated α₂/Ni22Cr10AlY/Al₂O₃ specimens causes transient alumina polymorphs obtained by APS to convert to α-Al₂O₃ and hence to ensure the lowest cyclic oxidation rate seen by a k_p value of 2.62×10⁻¹² g² cm⁻⁴ s⁻¹. Good adhesion to support of all the coated specimens is recorded following the cyclic oxidization treatment.