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bdd电催化耦合电解析处理载人航天器中冷凝废水的研究

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载人航天 2024年第2期30卷 174-182页

作者：王传增周文兴余青霓魏巍卞强杨润泽中国航天员科研训练中心人因工程全国重点实验室北京100094

为解决在硼掺杂的金刚石电极(bdd)电催化处理冷凝废水中,由于冷凝废水电导率低而导致处理能耗较高的问题,提出了bdd电催化耦合电解析的新方法处理冷凝废水。在bdd反应器内填充吸附有无机盐的混合阴阳离子交换树脂,电催化处理冷凝废水时... 详细信息

为解决在硼掺杂的金刚石电极(bdd)电催化处理冷凝废水中,由于冷凝废水电导率低而导致处理能耗较高的问题,提出了bdd电催化耦合电解析的新方法处理冷凝废水。在bdd反应器内填充吸附有无机盐的混合阴阳离子交换树脂,电催化处理冷凝废水时吸附在树脂上的离子在电场作用下解析下来进入废水中,并进行交替的吸附、解析及定向运动,从而改善废水的导电性,电极两端电压显著降低,停止加电后,离子又能重新交换吸附在树脂上。以Na_(2)SO_(4),Na_(3)PO_(4)以及NaNO_(3)作为电解质时,对总有机碳(TOC)去除没有影响;而以NaCl作为电解质时,TOC去除率随着NaCl添加量的增加而降低。

关键词：冷凝废水 bdd 电催化耦合电解析离子交换

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MoS@FeS催化电Fenton降解染料废水

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环境化学 2024年

作者：唐娟付艺佳肖琪钦邓雯栩巴图严展飞熊仪凡邢璇中央民族大学

本研究以掺硼金刚石(boron-doped diamond,bdd)电极为阳极,碳毡(carbon felt,CF)为阴极,并采用简单的一步溶剂热法合成Fe、Mo双金属复合材料,构建电Fenton系统,处理亚甲基蓝(methylene blue,MB)污染物.扫描电子显微(scanning electron microscopy,SEM)和X射线衍射(Xray diffraction,XRD)表征结果表明MoS2@FeS2双金属硫化物成功合成.实验结果表明MoS2@FeS2表现出优异的催化性能,在电流密度为5 mA·cm-2,投加量为0.3 g·L-1时,MB降解效率达94.7%,反应速率常数为0.019 min-1,是未投加催化剂的bdd-CF体系(0.008 min-1)的2.38倍.此外,该催化剂在pH为3—9的范围内对MB均具有较高的去除率,在实际应用中不需要调节pH.其机理分析表明在整个反应体系中Fe2+的浓度基本上维持在一个稳定的范围,表明该催化剂可通过Mo4+氧化为Mo6+促进Fe3+与Fe2+之间的氧化还原循环,从而可确保体系中有足够多的Fe2+用于有效活化,最大化H2O2的分解效率以促进·OH的产生,20 min时·OH的浓度达到1.43×10-5mol·L-1.

关键词：电Fenton bdd CF 亚甲基蓝 MoS @FeS

Solar photocatalytic energy conversion

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Science Bulletin 2017年第9期62卷 597-598页

作者： Xuxu Wang Dengwei Jing Meng Ni State Key Laboratory of Photocatalysis on Energy and Environment Research Institute of HotocatalysisCollege of ChemistryFuzhou UniversityFuzhou 350l16China International Research Center for Renewable Energy Xi'an Jiaotong UniversityXi'an 710049China Environmental Energy Research Group Research Institute for Sustainable Urban Development(RISUD)The Hong Kong Polytechnic UniversityHong KongChina

Development of clean and renewable energy sources is an inevitable choice of human society to address the energy shortage and environmental deterioration problems nowadays.Hydrogen has been recognized as the most idea... 详细信息

关键词： bdd OER

Adjustment of residual stress and intermediate layer to bdd/porous Ti composite membrane

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Optoelectronics Letters 2013年第3期9卷 189-193页

作者：田成璐李晓伟常明 Tianjin Key Laboratory of Thin Film Electronic and Communication Devices School of Electronics Information Engineering Tianjin University of Technology

Diamond films are deposited on porous Ti substrates by hot filament chemical vapor deposition (HFCVD) method. For adjusting the residual stress of substrate and the titanium carbide (TiC) intermediate layer, the substrates are under annealing process firstly, then are put into alkaline solution with electricity oxidation, and finally composite membranes are obtained by HFCVD, which are characterized by X-ray diffraction (XRD), metalloscope and scanning electron microscope (SEM). Results show that the composite membranes deposited on unannealed substrates are cracked obviously in both sides and broken off easily. After annealing process, the membranes are no longer cracked easily, because the tensile stress distributed in substrates is significantly relieved. After passivation process, TiC generated between diamond film and substrate is less than that without passivation process.

关键词：残余应力复合膜中间层多孔钛 TiC 热丝化学气相沉积法 bdd 应力和

An　Analytical　Delay　Model

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Journal of Computer Science & Technology 1999年第2期14卷 97-115页

作者：闵应骅李忠诚 Center for Fault-Tolerant Computing CAD Lab. Institute of Computing Technology Chinese Academy of Sciences Beijing P.R. China

Delay considerttion has been a major issue in design and test of high performance digital circuits . The assumption of input signal change occurring only when all internal nodes are stable restricts the increase of clock frequency. It is no longer true for wave pipelining circuits. However, previous logical delay models are based on the assumption. In addition, the stable time of a robust delay test generally depends on the longest sensitizable path delay. Thus , a new delay model is desirable. This paper explores the necessity first. Then, Boolean process to analytically describe the logical and timing behavior of a digital circuit is reviewed . The concept of sensitization is redefined precisely in this paper. Based on the new concept of sensitization, an analytical delay model is introduced . As a result , many untestable delay faults under the logical delay model can be tested if the output waveforms can be sampled at more time points. The longest sensitiaable path length is computed for circuit design and delay test .

关键词： timing analysis path sensitization Boolean process bdd wave- form delay model delay testing

Boron-Doped Diamond-Film-Based Two-Dimensional Electrode of Electrophoresis Tank

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Chinese Physics Letters 2016年第11期33卷 120-123页

作者：刘钧松李航孙博文丁战辉王启亮成绍恒李红东 State Key Lab of Superhard Materials College of PhysicsJilin University

Chemically robust conductive p-type boron-doped diamond （bdd） films are an important electrode material and have been widely applied in electrochemistry. In this study, bdd films are taken as a two-dimensional （2D） electrode in a eleetrophoresis tank system instead of the conventional one-dimensional platinum wire electrode. The theoretical simulations by finite element numerical analysis reveal that the 2D bdd electrodes have relatively high intensity and uniformity of electric field in the tank. Experimentally, the 2D bdd electrodes with smaller size show excellent properties for the separation of DNA fragments. The advantages of the 2D bdd electrodes with chemical inertness, sustainability, high intensity and uniformity electronic field, as well as reduced small size of electrophoresis tank would open a possibility for realizing new generation, high-performance biological devices.

关键词： of in on it is as Boron-Doped Diamond-Film-Based Two-Dimensional Electrode of Electrophoresis Tank bdd

Binary Decision Diagram Quantitative Analysis Method Based on Fuzzy Set Theory

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Journal of Shanghai Jiaotong university(Science) 2016年第4期21卷 489-493页

作者：于乐姜梅刘征李彦锋黄洪钟 Institute of Reliability Engineering University of Electronic Science and Technology of China

A binary decision diagram(bdd) is a data structure that is used to represent a Boolean function.Converting fault tree into bdd can effectively simplify counting processes and improve the accuracy and effectiveness of the results. However, due to various types of uncertainties in reliability data, we cannot obtain precise failure probabilities. In order to accurately quantify the certainties and obtain much more reliable results, we use bdd method based on fuzzy set theory for reliability quantitative analysis. In this regard, we take W-axis feeding system of heavy-duty computer numerical control(CNC) machine as a project example and adopt fuzzy bdd quantitative analysis method to analyze its reliability. The analysis results(aided by computer calculation)illustrate the effectiveness of the method proposed in this paper.

关键词：定量分析方法模糊集理论二元决策图可靠性数据计算机辅助计算 bdd 数据结构布尔函数

基于bdd电极电化学氧化法降解实际印染工业废水的研究

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基于BDD电极电化学氧化法降解实际印染工业废水的研究

作者：陈静双西南科技大学

学位级别：硕士

高浓度难降解工业废水具有排放量大、极难治理等特点,是生态环境治理的重点和研究热点。电化学高级氧化降解技术具有催化降解效率高、操作简便易于自动化控制、无二次污染等特点,在高浓度难降解工业废水的处理方面展现了巨大的潜力。本... 详细信息

高浓度难降解工业废水具有排放量大、极难治理等特点,是生态环境治理的重点和研究热点。电化学高级氧化降解技术具有催化降解效率高、操作简便易于自动化控制、无二次污染等特点,在高浓度难降解工业废水的处理方面展现了巨大的潜力。本论文以绵阳市三台县某印染厂的退浆工序和染色工序的实际废水为研究对象,以掺硼金刚石薄膜(bdd)为电极,系统地开展印染工业废水电化学高级氧化降解工艺探索与处理效率评价的研究。(一)退浆废水处理研究:针对退浆废水的高盐强碱特征(高硫酸根和氯离子浓度、强碱性),首先开展了电流密度(40-100 m A·cm)的研究,初始评价因素是电解对COD移除、可生化性及能耗的影响,实验结果表明在70 m A·cm电流密度的降解效果最佳,故选为系统研究电流;其次对原始水样中Cl、SO屏蔽处理的研究,进一步验证了SO、Cl对退浆废水中COD的去除均有影响;最后探究了NaSO添加量(100-500 m M)、NaCl电解质添加量(100-500 m M)、同一系列硫酸盐NaSO电解质添加量(2-12.5 g)对退浆废水COD移除率、降解动力学常数及能耗的影响,动力学常数k用以表明电化学产生强氧化剂导致的间接反应动力学特征,实验结果表明:在碱性退浆废水中过量添加NaCl电解质不利于氧化降解;随着NaSO、NaSO电解质的添加k值增加,符合拟一级动力学模型,综合实验结果表明添加NaSO电解质电解5 h COD几乎均能去除,表明bdd电极电化学降解退浆废水具有工业化应用潜质。(二)染色废水处理研究:针对染色废水COD极高、可生化性极差的特点,系统研究了电流密度(40-100 m A·cm)、p H(2-10)变化、不同电解质(KMnO、NaClO、HO、NaCl、NaSO、NaSO)的统一浓度(1 mol/L)对降解的影响以及氯化钠、硫酸钠、过硫酸钠等电解质添加量(2-8 g/L)对降解COD移除率、色度移除、可生化性降解能耗以及动力学参数的影响;动力学常数k用以表示电化学降解时产生的强氧化剂导致的间接反应动力学特征动力学特征,实验结果表明:(1)综合电解对COD移除、能耗、可生化性及色度移除的影响,结果表明选用80 m A·cm电流密度降解染色废水效果最佳,故选做后续实验的系统研究的基础电流;(2)调节不同p H变化对降解色度移除无明显变化;(3)进一步探究添加不同电解质对色度去除的影响结果表明,对比另外三组电解质的添加NaCl、NaSO、NaSO电解质对色度移除效果最佳;(4)添加量对降解的影响:但是NaCl添加量超过4g/L时降解效果下降,随着NaSO、NaSO电解质的增加降解效果增强对应的k值增大,氧化降解符合拟一级动力学;(5)通过添加NaSO电解质优化降解后,染色废水氧化降解10 h便可将废水中的COD、色度完全去除,能耗仅消耗26.4 k Wh·kg COD可考虑工业化应用。总之,bdd电极在电化学氧化处理实际工业印染废水中体现出高效节能、环境友好等特点,能够补足传统方法中的部分缺陷,有望面向更多的实际工业有机废水处理领域,具有较强的应用潜力。

关键词：电化学氧化 bdd 有机废水退浆废水染色废水

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基于越限风险值指标的电网脆弱环节识别

陕西科技大学学报 2022年第5期40卷 185-190,203页

作者：赵莹李琰徐天奇云南民族大学云南省高校电力信息物理融合系统重点实验室云南省高校信息与通信安全灾备重点实验室云南昆明650504

为了提高电力系统运行的稳定性,针对电网运行时受不确定因素影响会引起线路功率和节点电压越限的问题,考虑风电和负荷波动两个不确定因素提出越限风险值指标识别电网的脆弱环节.首先,分别定义线路功率越限风险值指标和节点电压越限风险... 详细信息

为了提高电力系统运行的稳定性,针对电网运行时受不确定因素影响会引起线路功率和节点电压越限的问题,考虑风电和负荷波动两个不确定因素提出越限风险值指标识别电网的脆弱环节.首先,分别定义线路功率越限风险值指标和节点电压越限风险值指标;接着,用n-k方法分别模拟电网中的线路断开和节点失效的情况,得到线路越限风险值和节点越限风险值分别对线路和节点进行排序;并利用二元决策图(bdd)算法提高n-k方法的识别效率;然后对IEEE 30节点系统和IEEE 118节点系统进行实验,验证越限风险值指标和n-k识别方法的有效性和普适性;最后分别模拟线路断开和节点故障,基于IEEE 118节点系统的切负荷量来评价识别指标和方法.

关键词：越限风险值指标脆弱环节 bdd n-k方法