硫酸盐还原菌对铜镍合金腐蚀的影响

利用电化学测试技术，在实验室条件下研究了硫酸盐还原菌(SRB)对铜镍合金腐蚀行为的影响。实验结果表明，SRB的存在使电极开路电位明显负移，极化电阻在细菌生长后期迅速降低。在含SRB的溶液中，铜镍合金表面会形成由腐蚀产物和SRB等组成的混合膜，腐蚀速度受到Cu通过混合膜向电极表面扩散速度的控制。     

硫酸盐还原菌对海底土中锌腐蚀的影响

利用微生物分析、交流阻抗测试技术、扫描电镜及表面能谱等方法，在室内模拟条件下研究了海底土中硫酸盐还原菌对锌腐蚀的影响，以及在以接菌及灭菌的海底土构成的宏电池腐蚀中锌的腐蚀行为。180d的试验结果表明：海底土中硫酸盐还原菌增强锌的腐蚀，锌在接菌泥中的平均腐蚀速率及点蚀深度均大于在灭菌泥中的平均腐蚀速率及点饰深度，平均腐蚀速率相差7．0倍，点蚀速率相差15．0倍以上。在接菌和灭菌海底土构成宏电池时，接菌海底土中锌作为阳极，腐蚀速率比自然腐蚀状态下有所增大，加速率为12．7％，而在灭菌海底土中锌作为阴极，腐蚀速率比自然腐蚀状态下有所减小。     

One-Component Artificial Gustatory System Based on Hydrogen-Bond Organic Framework for Discrimination of Versatile Analytes

Hydrogen-bond organic frameworks (HOFs) with excellent structural and luminescent properties have emerged as a promising material for the construction of fluorescence sensors. However, designing a facile, universal and high throughput sensor with multiplex detection capacity still remains challenging. Herein, a one-component sensor array is constructed that mimics natural gustatory system for accurate and high-throughput discrimination and identification of versatile analytes. HOF as a single sensing element greatly simplifies the probe preparation in sensor array and detection procedure. Metal ions, proteins and bacteria as the model targets are rapid and accurately discriminated, presenting the universality of the system. Particularly, the system is successfully used for the classification of antibiotic mechanisms. The study expands the application scope of HOFs and provides a facile and universal system for sensing applications.     

Solving cell formation and task scheduling in cellular manufacturing system by discrete bacteria foraging algorithm

We consider a joint decision model of cell formation and task scheduling in cellular manufacturing system under dual-resource constrained (DRC) setting. On one hand, machines and workers are multi-functional and/or multi-skilled, and they are grouped into workstations and cells. On the other hand, there is a processing sequence among operations of the parts which needs to be dispatched to the desirable workstations for processing. Inter-cell movements of parts can reduce the processing times and the makespan but will increase the inter-cell material handling costs. The objective of the problem is to minimise the material handling costs as well as the fixed and operating costs of machines and workers. Due to the NP-hardness of the problem, we propose an efficient discrete bacteria foraging algorithm (DBFA) with elaborately designed solution representation and bacteria evolution operators to solve the proposed problem. We tested our algorithm using randomly generated instances with different sizes and settings by comparing with the original bacteria foraging algorithm and a genetic algorithm. Our results show that the proposed DBFA has better performance than the two compared algorithms with the same running time.     

X80管线钢在含硫酸盐还原菌的土壤环境中的应力腐蚀开裂行为研究进展

X80管线钢因具有高强度、高韧性、抗脆断等性能,已成为现代油气运输中应用最为广泛的钢材之一。X80管线钢在埋地土壤环境中不可避免地受到应力和SRB(Sulfate-reducing bacteria)的共同作用,近年来有关X80管线钢在含SRB的土壤环境中的应力腐蚀开裂已成为一个研究重点。综述了应力腐蚀开裂和SRB腐蚀的影响因素,总结了关于应力和SRB协同作用对X80管线钢腐蚀行为影响的研究现状,分析了现行研究的缺陷和不足,并针对这些问题对今后的研究进行了展望。     

基于ITSQEM的IT服务质量研究

在SERVQUAL模型以及软件工程产品质量模型的基础上,结合IT服务质量的内涵和范畴,提出了IT服务质量评价模型(ITSQEM);并对该模型特性及子特性进行分析,提出了模型裁剪原则以及相应指标项的度量方法,使得质量评价更具有实用性和可操作性。     

基于氧电极的乙醇微生物传感器的在线检测系统

乙醇氧化菌消耗利用乙醇,并产生溶解氧的特性,结合 Clark 氧电极技术设计一种新的乙醇微生物传感器检测方法.该微生物为嗜有机甲基杆菌,是以乙醇作为唯一的碳源生长的菌株.采用利于微生物细胞生长的 PVA-海藻酸盐溶胶-凝胶包埋法,对筛选、分离得到的乙醇氧化细菌固定处理,通过 Clark 氧电极对催化乙醇产生的溶解氧进行...     

基于高斯混合模型的无线局域网定位算法

目标定位是无线局域网提供位置服务的基础。该文围绕无线局域网目标定位中的定位精度和实时性2个QoS指标,对基于RSSI的定位技术进行研究,提出一种基于高斯混合模型的无线局域网定位算法。该算法由离线训练和在线定位2个阶段组成,采用GMM对RSSI进行建模,降低了系统定位误差,并减少了定位阶段的运算量,提高了定位的实时性。仿真实验结果表明,该算法具有较好的定位精度和实时性。     

生物氧化法处理含油脂废水

该文介绍油脂分解菌装置处理含油脂废水的分解原理及实例。     

基于RVA法的河流生态需水量研究

以河流生态水文变化的指标体系（Indicator of Hydrologic Alteration,IHA）为基础,立足整体河流水文情势的流量谱系,采用变异性范围法（Range of Variability Approach,RVA）,进行基于长系列历史流量资料的河流生态需水量估算,并以山西省5条较大河流的生态敏感断面为对象进行研究。结果表明,利用本方法估算的结果是合理的,可为河流生态需水量的估算和水资源的可持续开发利用提供科学依据。