基于规则引擎的电子采购逆向竞拍的研究

近年来规则引擎技术已广泛应用于金融、电子商务及制造业等领域。当前大型企业的采购方式越来越多样化,传统采购系统所采用的逆向竞拍方案已不能满足现有需求。本文研究了规则引擎技术在企业电子采购系统中的应用,以将程序代码和业务规则分离开来。企业可以按照不同采购需求个性化配置采购规则,规则引擎控制整个拍卖过程,拍卖结束后系统再利用规则引擎自动对报价进行评分,帮助企业选择最优供应商,使其在采购过程中降低成本,提高采购效率。     

Electron beam deposition and characterization of thin film Ti-Ni for shape memory applications

Thin film of Ti-Ni alloy has a potential to perform the microactuation functions required in the microelectromechanical system (MEMS).It is essential, however, to have good uniformity in both chemical composition and thickness to realize its full potential as an active component of MEMS devices.Electron beam evaporation technique was employed in this study to fabricate the thin films of Ti-Ni alloy on different substrates.The targets used for the evaporation were first prepared by electron beam melting.The uniformity of composition and microstructure of the thin films were characterized by electron probe microanalysis (EPMA), Auger electron spectroscopy (AES), X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and transmission electron microscopy (TEM).The mechanical property of the thin films was evaluated by the nano-indentation test.The martensitic transformation temperature was measured by differential scanning calorimetry (DSC).It is confirmed that the chemical composition of deposited thin films is identical to that of the target materials.Furthermore, results from depth profiling of the chemical composition variation reveal that the electron beam evaporation process yields better compositional homogeneity than other conventional methods such as sputtering and thermal evaporation.Microstructural observation by TEM shows that nanometer size precipitates are preferentially distributed along the grain boundaries of a few micron size grains.The hardness and elastic modulus of thin films decreases with an increase in Ti contents.     

逆向工程中带孔洞的曲面对象三角剖分法研究

在分析现有的一些三角剖分方法的基础上，提出一种新的基于边界扩展的3D三角剖分方法，该方法首先采用一种空间栅格装点法来进行初始点云数据精简；再构造种子三角形，通过连接已剖分网格区域的边界边与最优扩展点来形成三角形网格从而向外扩展。该法可以对带有内孔等其他非凸壳的复杂曲面对象点云直接进行三角剖分，无需人工分区。实际应用表明采用该法可以快速、有效地从三维数据点集建立几何模型。     

MICROSTRUCTURE AND REVERSE SHAPE MEMORY EFFECT IN A Cu-Zn-Al ALLOY

The bainite structure in a Cu-Zn-A1 alloy related to the reverse shape memory effect hasbeen observed by means of TEM.The reverse memory effect may be improved by up to oneorder of magnitude under applied constraint stress.The widespread propagation of bainite wasconfirmed to be the diffusion controlled shear process by the parabolic configuration of sideinterface of bainite plate and the twisting of intersected bainite plates.     

线激光--机器视觉测量系统中的多传感器融合技术研究

针对逆向工程中直接从线激光扫描的数据云图中提取物体边界不仅繁琐而且精度也不好保证，为此提出建立线激光—机器视觉测量系统，先利用三日视觉获得物体初始边界，然后利用曲线延拓的方法并考虑影响延拓误差的因素，从而在满足一定精度要求的前提下实现不同传感器信息的融合。     

半导体硫化银纳米管的制备与光学性能

在以Triton X-100为表面活性剂形成的反相胶束体系中,成功地制备了半导体硫化银纳米管,管径88 nm～120nm、长度大于2.6 μm.X射线衍射测定表明,产物为纯单斜结构.紫外-可见光谱在275 nm处发现新的吸收峰,最大发射波长与体相材料相比,蓝移了38 nm.     

反对称矩阵的外在美和内在美的教学呈示

关于对称矩阵的美韵,笔者已经撰文做过研究,而反对称矩阵的美韵并不亚于对称矩阵。本文对反对称矩阵之美亦从“内”与“外”进行分析和探索。     

反相微乳液法制备高溶度ZrO2陶瓷墨水(Ⅰ)

尝试采用新颖的反相微乳液法制备陶瓷墨水，为了获得高溶度陶瓷墨水，对反相微乳液体系优选进行研究，着重就Triton x-100/醇／烷／水体系，采用目测法，分光光度法，电导率法和离心分离法，分别考察了不同醇，烷配伍时体系的稳定性和相关物理性质，根据这些性质是否突变以确定体系是否发生相变，给出了体系拟三元相图。实验表明，在20℃时Triton x-100／正己醇／环己烷／水反相微乳液体系表现优异，当Triton x-100与正醇的质量比为3：2时达到最大范围的反相微乳液区，最大溶水量时的最佳组成为Triton x-100:正己醇：环己烷：水＝19．1％：12．8％：23．7％：44．4％（质量比）。     

工业污水深度处理回用技术研究

通过对石化企业工业污水进行曝气生物滤池、连续微滤、反渗透等深度处理,使出水满足工业化用水的水质要求,从而得以回用。     

基于RKNN的选址算法及其应用研究

为了使各个设施的整体利用效果最佳, 结合空间位置影响力查询技术, 提出了基于RKNN的选址算法。针对空间对象对空间位置的贡献具有多重性, 建立了一种新的空间位置影响力的度量模型, 该模型更加符合实际应用情况; 然后, 利用该模型计算选址方案中各个设施的影响力, 并引入均衡系数评价选址方案的合理性, 均衡系数越小, 方案越合理。实际应用表明基于RKNN的选址算法使村镇基础设施的选址更加合理、有效。