系统可靠性有向故障流图模型及DMA算法

有向矩阵分析法(DigraphMatrixAnalysis), 简称DMA法, 以系统的有向故障流图作为可靠性模型, 采用拓扑学中的可达性计算直接形成系统的割集。本文在有向故障流图模型和可达性计算中引入多端与门的逻辑运算关系, 改进和完善了形成最小割集的算法。串联结构节点压缩技术和模块分解技术的应用, 有效地降低了系统的规模和割集形成过程的计算量。     

粒子获得质量的一种新约维法

将质量认为是粒子物理中的一种守恒荷，从而带来一种对称性。描述该对称性的群的构造常数，通过高维空间的推广的约维，将赋予粒子以质量。给出了矢量场和标量场获得质量的具体结果。     

发酵法生产5`—肌苷酸的研究：Ⅰ.高产菌株的选育

报道了从自然界分离产氨短杆菌(Brevibacterium ammoniagenes)进行遗传诱变,获得突变株直接发酵法生产5′—肌苷酸的研究结果.从采集的婴幼儿大便及鸟类粪便中,分离鉴定出6株产氨短杆菌.将其中的No.18和No.20用紫外线,硫酸二乙酯,亚硝基胍以多种不同方式进行诱变处理,用青霉素浓缩缺陷型.通过对2万多个单菌落的逐个检查,筛选鉴定出7株腺嘌呤缺陷型(A-),1株鸟嘌呤缺陷型(G-),12株腺嘌呤鸟嘌呤双重缺陷型(A-G-).摇瓶发酵结果,有3株A-G-产多量5′—肌苷酸,其中No.18—AG—17产量比较稳定,最高产量达12.1mg/mL。     

菲涅耳偏振理论的形成

菲涅耳将惠更斯理论和干涉原理结合起来，牢固地建立了光的波动理论的基础，它提供了光的直进、衍射的完整理论，提高了人们对光的波动性的信任，然而光的波动性对双折射或偏振现象是无能为力的，波动说的这一困惑是菲涅耳解决的。     

Quantitative determination of homogeneous strain value in superplastic tension

After load instability, a passage of homogeneous strain ε can be still continued in superplastic tensile deformation. But untill now, no one has given the precise value of ε corresponding to actual materials, neither in experimental measurements nor in theoretical calculations. Using the elaborate experimental measuring methods of m value and its function expressions, the note first gives the method to determine homogeneous ε, and the homogeneous ε value of typical superplastic alloy Zn-5% Al under 18℃ and 340℃ respectively.     

吴子高速黄土隧道施工技术研究

通过对黄土隧道的现场施工，重点论述了在隧道施工中针对湿陷性黄土这一特殊地质情况而采用的相应基础处理、洞口施工、初期支护、监测等工序中需要注意的施工要点和方法，阐明了针对黄土隧道群的施工技术和要点。     

提高城市道路大修工程路面质量的探索

随着城市建设的飞速发展,交通流量激增,城市道路路况越来越差,文中就城市主干道的大修,阐述了施工前的技术准备工作和施工过程控制。     

一个半断路器接线远方跳闸保护双通道的实现

针对晋城局新建的城西变电所一个半断路器接线型式,结合运行经验对原有远方跳闸保护微波通道的切换方式进行全面改进,彻底解决了松西甲、乙线在音频保护通道出现异常并告警时,造成故障启动装置被迫停用进而引起晋城城网安全的重大设备隐患.     

Tunable fabrication of single-crystalline CsPbI3 nanobelts and their application as photodetectors

Lead halide perovskites have received increasing attention recently as a candidate material in various optoelectronic areas because of their high performance as light absorbers. Herein, we report the growth of CsPbI3 nanobelts via a solution process. A single-crystalline CsPbI3 nanobelt with uniform morphology can be achieved by controlling the amount of PbI2. A single-crystalline CsPbI3 nanobelt possesses a mean width, length, and thickness of 100 nm, 5 μm, and 20 nm, respectively. In this work, photodetectors (PDs) based on individual CsPbI3 nano-belts are constructed and found to perform well with an external quantum efficiency and responsivity of 2.39 × 105％ and 770 A/W, respect-ively. The PDs also show a high detectivity of up to 3.12 × 1012 Jones, which is at par with that of Si PDs. The PDs developed in this work ex-hibit great promise in various optoelectronic nanodevices.     

A hybrid hydrogel/textile composite as flame-resistant dress

Currently, the functional and cost-effective flame-resistant textiles(FRTs) are on high demand. However, such FRTs based on general polymer fabrics are always expensive, readily decompose, and their temperatures quickly rise once exposed to thermal environments. Inspired by the large specific heat of water and high decomposition temperature of inorganic substances like SiO_2, this study establishes a simple casting strategy for preparing flameresistant gel/textiles(FR-GTs). The findings showed that active diffusion of aqueous AAM/SiO_2 pre-gel solution into the textile structure enabled the formation of a tough interfacial adhesion between the hydrogel and textiles.The interfacial toughness reached ～272 J/m~2 because the PAAM/SiO_2 nanocomposite hydrogel was filled into textile to form the semi-interpenetrating structure at the interface. The presence of chemical crosslinker(PEGDA)and physical crosslinker(SiO_2) limited the volume expansion of the hydrogel upon swelling. In addition, the PAAM/SiO_2 nanocomposite hydrogel layer prevented burning in high temperature environments(over 100℃),due to the heat dissipation of water during evaporation. This simple strategy provides a guidance towards the fabrication of hybrid hydrogel/textile composites for the applications like household fire resistant materials such as flame-resistant gloves.