电场积分方程矩量法中具有局部连续性的基函数积分奇异性降阶处理

三维散射与辐射问题常基于电场积分方程(EFIE),运用矩量法求解。该文证明了只要所选择的屋顶基函数(rooftop basis functions)具有局部连续性,无论对于平面或者曲面单元,都能将求解阻抗矩阵元素的积分函数写成一种对称形式,使得其奇异性降为 O(1/R),从而避免了现有文献中因处理源点和观察点重合时出现的O(1/R2)奇异性所导致的积分复杂性,数值计算结果表明了简化后计算公式的有效性和可靠性。     

A Mobile Cloud-Based eHealth Scheme

Mobile cloud computing is an emerging field that is gaining popularity across borders at a rapid pace. Similarly, the field of health informatics is also considered as an extremely important field. This work observes the collaboration between these two fields to solve the traditional problem of extracting Electrocardiogram signals from trace reports and then performing analysis. The developed system has two front ends, the first dedicated for the user to perform the photographing of the trace report. Once the photographing is complete, mobile computing is used to extract the signal. Once the signal is extracted, it is uploaded into the server and further analysis is performed on the signal in the cloud. Once this is done, the second interface, intended for the use of the physician, can download and view the trace from the cloud. The data is securely held using a password-based authentication method. The system presented here is one of the first attempts at delivering the total solution, and after further upgrades, it will be possible to deploy the system in a commercial setting.     

装配式RC梁柱塑性可控钢质节点抗震性能足尺试验研究

装配式RC梁柱塑性可控钢质节点由钢制节点模块、上下柱模块、梁模块以及阻尼器模块装配组成。通过对该装配式节点及现浇节点进行拟静力加载足尺试验，并采用ABAQUS软件进行有限元数值模拟，研究装配式节点承载力、滞回耗能、延性以及承载力退化等抗震性能指标。试验及有限元模拟结果表明：相较于现浇节点，装配式RC梁柱塑性可控钢质节点的滞回曲线更饱满，耗能能力更强，延性更好，承载能力退化更缓慢；该装配式节点的极限承载力低于现浇节点，但能有效控制混凝土损伤，避免梁端混凝土发生弯曲破坏，实现梁端“塑性可控”；建立的有限元模型可较准确地预测同种装配式节点的承载能力和变形能力。     

基于原型测量的渤海导管架平台抗冰保障系统

在渤海,多座仍在生产运行的以冰荷载为其控制荷载的导管架平台已接近或超过其设计寿命,冬季严重的冰激振动可能威胁导管架平台的安全运行。为保障渤海导管架平台的安全,在渤海几座导管架平台上安装了完整的原型测量系统,以建立渤海导管架平台抗冰保障系统。渤海导管架平台抗冰保障系统以渤海导管架平台冰激振动预报模型为核心,结合平台现场监测和平台失效准则,保障了渤海导管架平台在冬季冰期的安全运行。     

线性规划在时序电路中的应用

针对ＡＳＩＣ的逻辑综合典型过程中结构级优化后出现的时钟歪斜、时序混乱现象，分析了电路的结构。运用线性规划方法解决了逻辑综合中同步时序电路的优化和组合逻辑电路优化的问题。为逻辑综合中时序正常的运行提供了最佳方案。     

成象跟踪与跟踪智能化

采用成象跟踪方式可以提高跟踪精度、增强智能化能力及识别能力。将现代控制理论用于成象跟踪系统中,可以进一步提高跟踪质量。本文提出了利用图象特征去改进滤波效果的方法,并附有应用示例。     

Z2k上的对偶码

利用Z2k-线性码的生成矩阵及检验矩阵,给出了Z2k-线性码为自对偶码的必要条件,并给出了由一个Z2k-线性码构造Z2k-线性码的两种方法。     

Effects of red mud on rheological,crystalline, and mechanical properties of red mud/PBAT composites

This work presents the potential use of red mud (RM), which is a waste of industrial alumina, as a filler of a biodegradable polymer, poly(butylene adipate‐co‐terephthalate) (PBAT), to prepare environment friendly composite materials (RM/PBATs). The rheological properties and crystallization behavior of RM/PBAT composites with different contents of RM (0, 10, 20, 30, 40, and 50 wt%) were investigated in detail. After incorporating of RM, the crystalline temperature of PBAT was greatly improved. When the content of RM was 30 wt%, the crystalline temperature was up to 96.0°C which widened its' use. The rheological properties of the composites such as the storage modulus, loss modulus, and viscosity as well as the melting and crystalline temperature of the composites were also increased, whereas the crystallinity was slightly decreased with the increasing of RM. The prepared composite is expected in the future to be used for packaging materials. The scanning electron microscopy (SEM) was used to investigate the dispersion of RM in the PBAT matrix which had direct effect on the above properties. POLYM. COMPOS., 37:2001–2007, 2016. © 2015 Society of Plastics Engineers     

酒酒球菌高密度培养条件的优化

酒酒球菌（Oenococcus oeni）主导的苹果酸-乳酸（MLF）发酵是优质葡萄酒生产的重要工艺环节,制备高活菌数的酒酒球菌发酵剂是保障该环节顺利进行的重要前提之一。研究发现,一定量的L-苹果酸可以有效促进酒酒球菌的生长,并通过高密度培养条件优化提高酒酒球菌菌体密度。结果表明,通过正交试验得出的最佳高密度培养条件为初始pH值5.1、接种量3%、L-苹果酸添加量1 g/L。在此优化条件下,酒酒球菌ES-1的菌体密度较高,为（7.33±0.40）×109 CFU/mL;进一步结合化学中和法和半连续培养法,可使最终菌体密度达（1.67±0.11）×1010 CFU/mL,是对照组的11倍。该研究获得的高密度培养优化方案可为制备优质本土酒酒球菌发酵剂奠定基础。