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Chemical additives affect sulfate reducing bacteria biofilm properties adsorbed on stainless steel 316L surface in circulating cooling water system

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Frontiers of Environmental Science & Engineering 2017年第2期11卷 143-156页

作者： Yu Qi Jin li Rui liang Sitong Ji jianxiang li Meng liu Research Center for Aqueous Organic Pollutants Control and Water Quality Security Beijing Key Laboratory Beijing Jiaotong University Beijing 100044 China

This paper studied the biofilm properties and corrosion behavior of sulfate reducing bacteria （SRB） on stainless steel 316L （SS316L） surface in circulating cooling water system with and without additives including hydroxy ethyl fork phosphonic acid （HEDP）, dodecyl dimethyl benzyl anunonium chlotide （1227） and NaClO. Biochemical technique, electrochemical technology, X-ray photoelectron spectroscopy （XPS） and scanning electron microscope （SEM） were used. The results show that the extracellular polymeric substance （EPS） in biofilm attached on the SS316L surface mainly contain proteins and polysaccharides, the contents are 98 ***-2 and ***-2, respectively. The polysaccharides were cut by 1227 about 80%, while 55% by NaCIO. The proteins were reduced by NaCIO about 53%, while only 30% by 1227. The potentiodynamic polarization shows that the corrosion potential of SS316L was enhanced from -0.495 V to -0.390 V by the chemical additive delaying the occurrence of the corrosion. And the corrosion rate was also reduced from 5.19 × 10^-3 mm·a^-1 to 2.42 × 10^-3 mm＇a . But NaCIO stdl caused pitting corrosion after stenhzmg the bacteria, while 1227 can form a protective film on the surface of SS316L. Though HEDP contribute to the bacteria activity, it can enhance the breakdown potential. XPS results confirmed that 1227 can change the value of C：O in the biofilm attached on metal surface, and NaCIO can eliminate the existence of amidogen. This study would provide some recommendations for the selection of chemical additives in the thermal power plant.

关键词： Sulfate reducing bacteria (SRB)Chemical additivesBiofilmExtracellular polymeric substance (EPS)Microbe conosion

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Removal of Benzothiophene by Extraction with Deep Eutectic Solvents[Bmim]Br-Polyalcohol

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China Petroleum Processing & Petrochemical Technology 2020年第3期22卷 49-55页

作者： li Wenshen Ren Yongqi li jianxiang Hao Yuanbo liu Jie School of Petrochemical Engineering Liaoning Shihua UniversityFushun 113001 School of Innovation and Entrepreneurship Liaoning Shihua UniversityFushun 113001

Deep eutectic solvents(DESs)1-butyl-3-methylimidazolium bromide-polyalcohol([Bmim]Br-polyalcohol)were synthesized from[Bmim]Br and polyalcohol such as ethylene glycol(EG),propylene glycol(PG),glycerol(GL)at a molar ratio of 1:2.[Bmim]Br-2propylene glycol([Bmim]Br-2PG)was characterized with FT-IR spectroscopy and 1H *** removal of benzothiophene(BT)from model oil was investigated by extraction with DES[Bmim]*** results showed that an extraction efficiency as high as 54.1%could be achieved with the solvent in one-stage extraction at 30℃in 30 min with a DES/oil mass ratio of 1:*** desulfurization was realized after five-stage extraction,and sulfur content in model oil was reduced to less than 10μg/*** used[Bmim]Br-2PG DES was regenerated and showed an extraction efficiency of 50.5%within four recycles.

关键词： extraction desulfurization benzothiophene DESs [Bmim]Br-polyalcohol

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Removal of Basic Nitrogen Compounds from Diesel Fraction with NMP-0.5ZnCl_(2) Coordinated Ionic liquid

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China Petroleum Processing & Petrochemical Technology 2021年第1期23卷 98-104页

作者： li Wenshen Ren Yongqi li jianxiang Zhao Zhijun liu Jie School of Petrochemical Engineering Liaoning Petrochemical UniversityFushun 113001 School of Innovation and Entrepreneurship Liaoning Petrochemical UniversityFushun 113001

An inexpensive coordinated ionic liquid NMP-0.5ZnCl_(2) was synthesized by reacting N-methyl-pyrrolidone with anhydrous ZnCl_(2),and its structure was characterized with FT-IR *** performance of IL for removing basic nitrogen compounds from model oil containing quinoline and actual coker diesel was *** results showed that the IL,NMP-0.5ZnCl_(2),exhibited a good denitrogenation performance,which can be attributed to its low viscosity and unoccupied orbitals of Zn ion,while obtaining a 99.68%quinoline removal efficiency under conditions covering a temperature of 50℃,an IL/model oil mass ratio of 1:2,and a reaction time of 30 *** the case of coker diesel,above a 91%basic N-removal efficiency(with N-content reduced from 536μg/g to 47μg/g)was realized by the IL after 5-stage ***,the quinoline extraction efficiency could still reach 96.73%during four recycles of the IL.

关键词： coordinated ionic liquid NMP-0.5ZnCl_(2) denitrogenation quinoline coker diesel

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Performability analysis of avionics system with multilayer HM/FM using stochastic Petri nets

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Chinese Journal of Aeronautics 2013年第2期26卷 363-377页

作者： Wan Jianxiong Xiang Xudong Bai Xiaoying lin Chuang Kong Xiangzhen li jianxiang School of Computer Science and Communication Engineering University of Science and Technology Department of Computer Science and Technology Tsinghua University Tsinghua National Laboratory for Information Science and Technology Tsinghua University

The integrated modular avionics （IMA） architecture is an open standard in avionics industry, in which the number of functionalities implemented by software is greater than ever before. In the IMA architecture, the reliability of the avionics system is highly affected by the software applications. In order to enhance the fault tolerance feature with regard to software application failures, many industrial standards propose a layered health monitoring/fault management （HM/FM） scheme to periodically check the health status of software application processes and recover the malfunctioning software process whenever an error is located. In this paper, we make an analytical study of the HM/FM system for avionics application software. We use the stochastic Petri nets （SPN） to build a formal model of each component and present a method to combine the components together to form a complete system model with respect to three interlayer query strategies. We further investigate the effectiveness of these strategies in an illustrative system.

关键词： Health monitoring/fault management system Integrated modular avionics Multilayer Performability analysis Stochastic Petri nets

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Strong Tracking Particle Filter Based on the Chi-Square Test for Indoor Positioning

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Computer Modeling in Engineering & Sciences 2023年第8期136卷 1441-1455页

作者： lingwu Qian jianxiang li Qi Tang Mengfei liu Bingjie Yuan Guoli Ji Department of Automation Xiamen UniversityXiamen361102China Xiamen Tobacco Industry Co. Ltd.Xiamen361022China

In recent years,a number of wireless indoor positioning(WIP),such as Bluetooth,Wi-Fi,and Ultra-Wideband(UWB)technologies,are ***,the indoor environment is complex and ***,pillars,and even pedestrians may block wireless signals and produce non-line-of-sight(NLOS)deviations,resulting in decreased positioning accuracy and the inability to provide people with real-time continuous indoor *** work proposed a strong tracking particle filter based on the chi-square test(SPFC)for indoor *** can fuse indoor wireless signals and the information of the inertial sensing unit(IMU)in the smartphone and detect the NLOS deviation through the chi-square test to avoid the influence of the NLOS deviation on the final positioning *** experiment results show that the proposed SPFC can reduce the positioning error by 15.1%and 12.3% compared with existing fusion positioning systems in the LOS and NLOS environment.

关键词： NLOS strong tracking filter particle filter CST pedestrian dead reckoning indoor positioning

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DEGREE CONDITIONS FOR GRAPHS TO BE FRACTIONAL(a,b,n)-CRITICAL GRAPHS

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Journal of Systems Science & Complexity 2006年第4期19卷 491-497页

作者： jianxiang li Yinghong MA Department of Mathematics Hunan University of Science and Technology Xiangtan 411201 China. School of Management Shandong Normal University Jinan 25014 China.

Let G be a graph, and a and b be integers with a ≤ b. A graph G is called a fraetional （a, b, n）-critical graph if after any n vertices of G are deleted the remaining subgraph has a fractional [a, b]-factor. In this paper two degree conditions for graphs to be fractional （a, b, n）-eritical graphs are presented, and the degree conditions are sharp in some sense.

关键词： Fractional [a b]-factor fractional (a b n)-critical graph.

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Design scheme for fast charging station for electric vehicles with distributed photovoltaic power generation

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Global Energy Interconnection 2019年第2期2卷 150-159页

作者： Jing Zhang Chang liu Ruiming Yuan Taoyong li Kang li Bin li jianxiang li Zhenyu Jiang China Electric Power Research Institute Beijing Electric Vehicle Charging and Replacing Engineering Technology Research Center Electric Power Research Institute State Grid Jibei Electric Power Company Limited Electric Power Research Institute State Grid Shandong Electric Power Company

The demand for fast charging is increasing owing to the rapid expansion of the market for electric vehicles. In addition, the power generation technology for distributed photovoltaic has matured. This paper presents a design scheme for a fast charging station for electric vehicles equipped with distributed photovoltaic power generation system taking the area with certain conditions in Beijing as an example construction site. The technical indexes and equipment lectotype covering the general framework and subsystems of the charging station are determined by analyzing the charging service demand of fast charging stations. In this study, the layout of the station is developed and the operation benefits of the station is analyzed. The design scheme realizes the design objective of "rationalization, modularization and intelligentization" of the fast charging station and can be used as reference for the construction of a fast charging network in urban area.

关键词： Electric vehicle Fast charging station Charging demand Design scheme Distributed photovoltaic

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Huanglian Jiedu decoction alleviates SHR aortic injury via regulating IRE1α-XBP1-CHOP endoplasmic reticulum stress signal pathway

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China Medical Abstracts(Internal Medicine) 2023年第3期40卷 136-137页

作者：李建橡 Dept Cardiovasc Med Ruikang HospGuangxi TCM UnivNanning 530011

Objective To observe the effect of Huanglian Jiedu Decoction(HLJDD)on the endoplasmic reticulum stress signaling pathway mediated by inositol-requiring enzyme 1α-X-box binding protein 1-C/EBP homologous protein(IRE1... 详细信息

关键词： CHOP reticulum SHR

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多时段露天开采短期计划优化

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金属矿山 2001年第4期30卷 1-4,18页

作者：李建祥王青东北大学

引入模块规整性概念及约束 ,建立了一个多时段短期计划优化的数学模型 ,并提出了一种能够有效求解该模型的迭代算法。

关键词：露天矿生产计划数学模型迭代算法数学优化法

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基于UML-NuSMV的并发系统建模与验证

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华中科技大学学报（自然科学版） 2024年第2期52卷 90-95页

作者：马占有郭昊李召恺李健祥北方民族大学计算机科学与工程学院宁夏银川750030

为解决直接建立系统NuSMV(符号模型检测器)模型的困难,提出一种从UML(统一建模语言)模型转换到NuSMV模型的方法,实现了UML与NuSMV结合的形式化验证.首先,使用UML中的视图对系统进行描述,建立系统的UML模型;然后,设计转换规则并给出转换... 详细信息

为解决直接建立系统NuSMV(符号模型检测器)模型的困难,提出一种从UML(统一建模语言)模型转换到NuSMV模型的方法,实现了UML与NuSMV结合的形式化验证.首先,使用UML中的视图对系统进行描述,建立系统的UML模型;然后,设计转换规则并给出转换算法,实现从UML模型到NuSMV模型的自动转换;最后,使用计算树逻辑对系统的属性进行描述,并通过NuSMV完成对系统的形式化验证.以一个双按键并发电梯系统为例,说明了基于UML-NuSMV的并发系统建模与验证过程.

关键词：模型检测统一建模语言模型转换并发系统符号模型检测器

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