改进的风险矩阵法在电力系统结构与电力设备设施综合风险评价中的应用

针对传统风险矩阵法等级划分不精细和烈度与概率异质性的缺陷,引入模糊逻辑,构建了模糊风险矩阵图,提出灵敏度分析理论。将改进的风险矩阵法与层次分析法相结合确定不同风险的权重,计算出综合风险值,对应综合风险等级标准即可提出相应措施,并以四川省电力系统为例,探讨了该方法在电力系统风险评估中的应用。结果表明,改进的风险矩阵法有效解决了风险结问题,提高了模型的精确度。     

一种任意次非均匀B 样条的细分算法

类似于经典的、应用于任意次均匀B 样条的Lane-Riesenfeld 细分算法, 提出了一种任意次非均匀B 样条的细分算法,算法包含加细和光滑两个步骤,可生成任意 次非均匀B 样条曲线。算法是基于于开花方法提出的,不同于以均匀B 样条基函数的卷积 公式为基础的Lane-Riesenfeld 细分算法。通过引入两个开花多项式,给出了算法正确性的 详细证明。算法的时间复杂度优于经典的任意次均匀B 样条细分算法,与已有的任意次非 均匀B 样条细分算法的计算量相当。     

维罗绒仿扎染工艺

维罗绒织物厚重挺括,仿扎染工艺采用泼洒染液、喷后压皱,形成自然的冰纹效应;再经高温高压汽蒸,形成以主色调为主,渗透色为辅的色彩斑斓的仿扎染产品.该工艺不受套色限制,将印花、染色、扎染和压皱等方法融合在一起,提高了生产效率.     

基于PZT结Lamb波方向算法的损伤定位方法

基于Lamb波在板中的传播特性,针对复合材料的损伤检测,提出一种新型的损伤定位方法。该方法采用3个压电陶瓷片( piezoelectric transducers,简称PZT)组成PZT结,通过从各PZT中提取出损伤散射信号,找到其损伤波包到达的时间差,并依据Lamb波的传播速度得到位移差。首先,结合PZT结中各PZT的几何位置,具体推导出损伤方向算法,运用方向算法找到Lamb波在损伤位置发生散射后的其中一个传播方向,通过传播方向的交点来实现损伤位置的判定;其次,分析了互相关理论的基本原理,并运用互相关算法提取出损伤散射信号;最后,在碳纤维增强树脂基复合材料薄板上对该算法进行实验验证,求出了损伤方向以及损伤位置。验证结果表明,该方法能够对复合材料损伤进行有效的定位。     

编织结构玻璃长丝缝合线的打结强度

针对玻璃纤维丝束在纺织预制件或预浸料的缝合过程中易发生断裂的情况,设计了二维管状编织结构的玻璃纤维缝合线。采用Instron电子万能试验机对不同编织工艺参数的缝合线试样分别进行了loop结和knot结的拉伸强度测试,分析了拉伸断裂的机制和破坏模式。结果表明：编织结构玻璃长丝缝合线的打结强度和断裂伸长率明显高于玻璃丝束;花节长度是影响打结性能的主要因素;试样在试验过程中受剪切和拉力共同作用,经历伸直-受力-断裂几个阶段,试样断口基本平齐。     

缤纷世界--谈扎染艺术

扎染是我国古老的民间传统手工印染工艺,本文讲述了扎染的传统制作工艺、特点及实际应用范围。     

265m^2烧结机自动控制系统的三电一体化设计

主要介绍了新区烧结厂265m^2烧结机计算机控制系统的三电一体化设计思路和设计特点,主要包括仪控设计、计算机控制系统设、电控设计以及控制功能的实现。     

A Cactus‐Derived Toxin‐Like Cystine Knot Peptide with Selective Antimicrobial Activity

Naturally occurring cystine knot peptides show a wide range of biological activity, and as they have inherent stability they represent potential scaffolds for peptide‐based drug design and biomolecular engineering. Here we report the discovery, sequencing, chemical synthesis, three‐dimensional solution structure determination and bioactivity of the first cystine knot peptide from Cactaceae (cactus) family: Ep‐AMP1 from Echinopsis pachanoi. The structure of Ep‐AMP1 (35 amino acids) conforms to that of the inhibitor cystine knot (or knottin) family but represents a novel diverse sequence; its activity was more than 500 times higher against bacterial than against eukaryotic cells. Rapid bactericidal action and liposome leakage implicate membrane permeabilisation as the mechanism of action. Sequence homology places Ec‐AMP1 in the plant C6‐type of antimicrobial peptides, but the three dimensional structure is highly similar to that of a spider neurotoxin.     

Construction of the matched multiple knot B-spline wavelets on a bounded interval

In order to solve a boundary value problem using Galerkin's method, the selection of basis functions plays a crucial rule. When the solution of a boundary value problem is not enough smooth or the domain is irregular, multiple knot B-spline wavelets (MKBSWs) with locally compact support are appropriate basis functions. However, to have globally continuous basis functions, a matching across the subdomain interfaces is required. In other words, MKBSWs that are non-zero in the interelement boundaries should be matched. In this paper, we present the primal and dual matched multiple knot B-spline scaling and wavelet functions whose main properties of smoothness and biorthogonality are kept.