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Terminal sulfur atoms formation via defect engineering strategy to promote the conversion of lithium polysulfides

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Journal of Materials Science & Technology 2022年第8期103卷 221-231页

作者： Yuanchang li wenda li Xiujuan Yan Zhenfang Zhou Xiaosong Guo Jing liu Changming Mao Zhonghua Zhang Guicun li College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China

The defect engineering shows great potential in boosting the conversion of lithium polysulfides intermediates for high energy density lithium-sulfur batteries(LSBs),yet the catalytic mechanisms remain ***,the oxygen-defective li_(4)Ti_(5)O_(12)-xhollow microspheres uniformly encapsulated by N-doped carbon layer(OD-LTO@NC)is delicately designed as an intrinsically polar inorganic sulfur host for the research on the catalytic *** simulations have demonstrated that the existence of oxygen deficiencies enhances the adsorption capability of spinel li_(4)Ti_(5)O_(12)towards soluble lithium ***-S-S-bonds of the li2S6on the defective li_(4)Ti_(5)O_(12)surface are fractured by the strong adsorption force,which allows the inert bridging sulfur atoms to be converted into the susceptible terminal sulfur atoms,and reduces the activation energy of the polysulfide conversion in some *** addition,with the N-doped carbon layer,secondary hollow microspheres architecture built with primary ultrathin nanosheets provide a large amount of void space and active sites for sulfur storage,adsorption and *** as-designed sulfur host exhibits a remarkable rate capability of 547 m Ah g^(-1)at 4C(1 C=1675 m A g^(-1))and an outstanding long-term cyclability(519 m Ah g^(-1)after 1000 cycles at 3 C).Besides,a high specific capacity of 832 m Ah g^(-1)is delivered even after 100 cycles under a high sulfur mass loading of 3.2 mg cm^(-2),indicating its superior electrochemical *** work not only provides a strong proof for the application of oxygen defect in the adsorption and catalytic conversion of lithium polysulfides,but offers a promising avenue to achieve high performance LSBs with the material design concept of incorporating oxygen-deficient spinel structure with hierarchical hollow frameworks.

关键词： lithium-sulfur batteries Oxygen deficiency lithium titanate Hierarchical hollow microsphere Conversion kinetics

芬顿-ABR厌氧-生物接触氧化法组合工艺处理化学合成制药废水的工程应用

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中国沼气 2024年第3期42卷 56-59页

作者：朱亚飞刘峻杨伟纳李文达郑州亿众环境科技有限公司河南郑州450006 江苏润环环境科技有限公司河南分公司河南郑州450006

化学合成制药废水具有有机物浓度高且成分复杂的特点,通过研究废水特征,探索一种高效稳定的处理工艺。以某工程为例,采用芬顿氧化-ABR厌氧-生物接触氧化法-混凝沉淀-活性炭过滤组合工艺,对工艺进行了详细介绍。化验结果显示,废水COD、BO... 详细信息

化学合成制药废水具有有机物浓度高且成分复杂的特点,通过研究废水特征,探索一种高效稳定的处理工艺。以某工程为例,采用芬顿氧化-ABR厌氧-生物接触氧化法-混凝沉淀-活性炭过滤组合工艺,对工艺进行了详细介绍。化验结果显示,废水COD、BOD_(5)、SS、NH_(3)-N的质量浓度分别为5200~5400 mg·L^(-1)、1100~1250 mg·L^(-1)、180~200 mg·L^(-1)、50~60 mg·L^(-1)、色度为80~100度。经105 d系统调试,不断优化运行控制参数,出水COD、BOD_(5)、SS、NH_(3)-N的质量浓度分别达到180 mg·L^(-1)、30 mg·L^(-1)、10 mg·L^(-1)、20 mg·L^(-1)以下,色度达到10度以下,主要污染物指标可达到《化学合成类制药工业水污染物间接排放标准》(DB41/756—2012)中的B级标准。针对此类化学合成制药废水,采用芬顿-ABR厌氧-生物接触氧化法组合工艺,技术可行,具有良好的环境效益。

关键词：芬顿氧化 ABR厌氧生物接触氧化法化学合成制药废水

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风险管控思路的土壤重金属污染及防治策略

环境保护科学 2024年第4期50卷 169-174页

作者：李文达翟文静朱亚飞杨伟纳江苏润环环境科技有限公司河南分公司郑州450000 河南工学院新乡453000 郑州亿众环境科技有限公司郑州450000

以河南省郑州市某矿区周边农田为例,基于风险管控思路,对土壤重金属污染进行了研究。结果表明;5种重金属Zn、Cr、Pb、Cu、Cd在各土层的质量分数顺序均为Zn>Cr>Pb>Cu>Cd,其质量分数随土层深度增加而减小;在0~15 cm土层中,Cu、Cr、Zn、Pb... 详细信息

以河南省郑州市某矿区周边农田为例,基于风险管控思路,对土壤重金属污染进行了研究。结果表明;5种重金属Zn、Cr、Pb、Cu、Cd在各土层的质量分数顺序均为Zn>Cr>Pb>Cu>Cd,其质量分数随土层深度增加而减小;在0~15 cm土层中,Cu、Cr、Zn、Pb质量分数明显高于下层土壤,其来源可能主要为工厂排放烟尘、大气降尘、汽车尾气等,其中Cu、Cd、Pb平均质量分数分别高于研究区背景值20.30%、93.10%、57.47%;重金属向下层迁移作用不显著,主要在表层富集,且从土壤进入食物链风险加大;土壤重金属间均显著正相关,Zn、Cu相关性最高,Cr、Cd、Pb间相关性较弱。Cd变异性在第一主成分中较大,高值区主要分布于水泥厂附近,确定“三废”、农田施肥、交通运输等人为活动为第一主成分。提出针对优先保护类和安全利用类等土壤重金属污染的防治对策。

关键词：风险管控重金属污染防治策略土壤

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新工科背景下智能焊接融入思政教育建设路径研究

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电焊机 2024年第7期54卷 149-153页

作者：苏娜李文达王加友胥国祥朱杰江苏科技大学材料科学与工程学院江苏镇江212003

在新工科背景下,为了进一步提高焊接专业学生的专业素养和创新能力,通过分析焊接教学中存在“学习目标不明确”“交叉学科有难度”和“职业路径未规划”的三个现状,提出“追溯过去”“把握现在”和“开拓未来”的三种智能焊接思政育人途... 详细信息

在新工科背景下,为了进一步提高焊接专业学生的专业素养和创新能力,通过分析焊接教学中存在“学习目标不明确”“交叉学科有难度”和“职业路径未规划”的三个现状,提出“追溯过去”“把握现在”和“开拓未来”的三种智能焊接思政育人途径,传承老一辈焊接人奋斗精神、融合现有资源教育方法、培养学生创新精神。实现智能焊接专业化教育与思政教育的有机融入,从而探寻新工科背景下人才培养的有效途径,为海洋强国战略贡献力量。

关键词：新工科智能焊接思政教育建设路径

基于络病理论探讨冠心汤对气虚血瘀型心绞痛患者心率变异性、心肌微循环及运动耐量的影响

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中医药信息 2024年第2期41卷 56-61页

作者：王雪梅宋广朴李文大张彩英刘俊鹤廊坊市第四人民医院河北霸州065700 唐山市南湖医院河北唐山063013 唐山市古冶区中医医院河北唐山063100

目的:基于络病理论探讨冠心汤对气虚血瘀型心绞痛患者心率变异性、心肌微循环及运动耐量的影响。方法:选取符合纳入标准的112例气虚血瘀型心绞痛患者,依据随机数字表随机分为对照组和治疗组,每组各56例。对照组给予常规西药治疗,治疗组... 详细信息

目的:基于络病理论探讨冠心汤对气虚血瘀型心绞痛患者心率变异性、心肌微循环及运动耐量的影响。方法:选取符合纳入标准的112例气虚血瘀型心绞痛患者,依据随机数字表随机分为对照组和治疗组,每组各56例。对照组给予常规西药治疗,治疗组在对照组基础上口服冠心汤治疗,两组均治疗6周。比较两组患者治疗前后心率变异性指标[高频功率(HF)]、正常窦性心搏间期标准差(SDNN)、相邻窦性心搏间期差值>50 ms心搏数百分比(PNN50)、正常相邻窦性心搏间期差值平方根(RMSSD)、运动耐量指标[6分钟步行试验(6MWT)]及中医证候积分的变化情况;比较两组患者治疗后心肌微循环指标,包括左回旋支校正时间流帧计数(LCX CTFC)、右冠脉校正时间流帧计数(RCA CTFC)、左前降支校正时间流帧计数(LAD CTFC)及TIMI心肌组织灌注分级(TMPG)达到3级标准的占比情况;比较两组患者临床疗效与不良反应发生情况。结果:治疗后,两组患者心率变异性指标HF、SDNN、PNN50及RMSSD水平均高于治疗前(P<0.05),且治疗组高于对照组(P<0.001);治疗后,两组患者6MWT水平高于治疗前(P<0.05),中医证候积分水平低于治疗前(P<0.05),且治疗组患者6MWT水平高于对照组(P<0.001),中医证候积分水平低于对照组(P<0.001);治疗后,治疗组LCX CTFC、RCA CTFC、LAD CTFC水平低于对照组(P<0.001),TMPG 3级占比高于对照组(P<0.05);治疗组临床总有效率(94.64%,53/56)高于对照组(80.36%,45/56)(P<0.05);两组不良反应发生率比较,差异无统计学意义(χ^(2)=0.121,P=0.728)。结论:基于络病理论给予气虚血瘀型心绞痛患者冠心汤治疗疗效确切,可更好地缓解患者临床症状,改善患者心率变异性、运动耐量及心肌微循环,且安全性高。

关键词：络病理论冠心汤气虚血瘀型心绞痛心率变异性心肌微循环运动耐量

Transient tribo-dynamic analysis of crosshead slipper in lowspeed marine diesel engines during engine startup

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Friction 2021年第6期9卷 1504-1527页

作者： Rui li Xianghui MENG Jingjin DONG wenda li State Key Laboratory of Mechanical System and Vibration Shanghai Jiaotong UniversityShanghai 200240China School of Mechanical Engineering Shanghai Jiaotong UniversityShanghai 200240China China Shipbuilding Power Engineering Institute Company limited Shanghai 201206China

A crosshead slipper-guide system,which bears a significant thrust force,is an essential friction pair in low-speed marine diesel *** to the low moving speed of the crosshead slipper during engine startup,it is difficult to form good hydrodynamic lubrication between the crosshead slipper and ***,a detailed analysis of the crosshead slipper during engine startup is *** this study,a new transient tribo-dynamic model for a crosshead slipper during the engine startup process is *** model consists of a mixed lubrication model of the crosshead slipper-guide and dynamic models of the piston assembly,crosshead assembly,connecting rod,and *** tribo-dynamic performances of the crosshead slipper during startup and under the rated conditions were simulated and *** results show that the tribo-dynamics of the crosshead slipper during the startup process are significantly different from those under the rated *** measures beneficial for the low friction of a crosshead slipper-guide under the rated conditions may significantly increase the friction loss of the crosshead slipper-guide system during the startup process.

关键词： low-speed marine diesel engine crosshead slipper engine start-up mixed lubrication friction loss tribo-dynamic model

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矿用气动防水密闭门结构的研究

煤矿机械 2024年第3期45卷 109-111页

作者：李昌杰刘建王建风王春奇李文达付友张海林兖煤菏泽能化有限公司赵楼煤矿山东菏泽274700 中煤科工集团南京设计研究院有限公司南京210031

防水密闭门是煤矿井下重要的安全防护设备。目前煤矿用防水密闭门因建设年代较早,大多未能实现自动控制和远程控制,且密闭效果不佳。为此设计了一种齿轮传动式矿用气动控制的防水闸门,可以结合自动控制系统对其进行远程控制,且密闭可靠。

关键词：防水密闭门动力臂扭矩

The Potential of Commercial Pension Insurance to Develop into One of the Pillars of Rural Pension Insurance:A Study from the Demand Perspective

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Contemporary Social Sciences 2023年第2期8卷 1-20页

作者： Hu Junbo li wenda Wang Jianrui Rural Development Research Institute Sichuan Academy of Social SciencesChengduSichuan610071China

The development of a multi-pillar pension insurance system is an effective solution for an aging *** pension insurance,as the third pillar of pension insurance,is an integral part of this system in China and can play a critical and complementary role in rural areas where support for the elderly is a more pressing concern and a second pillar of pension insurance remains *** this end,we first elaborate on the theoretical logic that commercial pension insurance can develop into one of the pillars of rural pension *** then empirically test rural residents’willingness to participate in a commercial pension insurance plan(CPIP)in a probit model with household research data from rural areas in major labor-exporting provinces,such as Sichuan and Henan so as to explore whether commercial pension insurance has the potential to become one of the pillars of rural pension *** research findings can be synthesized in three ***,rural residents out of agricultural production for five consecutive years are more willing to participate in a CPIP than other rural residents,indicating that progress in industrialization and urbanization can significantly boost such ***,the younger rural residents are more inclined to participate in a CPIP than the older ***,income increases can significantly boost rural residents’willingness to participate in a ***,with progress in industrialization and urbanization and an increase in rural disposable income,commercial pension insurance has a promising potential in rural areas and can hopefully develop into one of the pillars of rural pension insurance.

关键词： the pillar of pension insurance commercial pension insurance willingness to participate(in a CPIP)

Foodborne toxin Aflatoxin B_(1)induced glomerular podocyte inflammation through proteolysis of RelA,downregulation of miR-9 and CXCR4/TXNIP/NLRP3 pathway

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Food Science and Human Wellness 2024年第4期13卷 2289-2309页

作者： Jie Zhang Shuang Yang Baocai Xu Zihui Qin Xinyi Guo Ben Wei Qinghua Wu Kamil Kuca Tushuai li wenda Wu School of Biology and Food Engineering Changshu Institute of TechnologySuzhou 215500China Center for Clinical Mass Spectrometry School of Pharmaceutical SciencesSoochow UniversitySuzhou 215123China School of Food and Biological Engineering Hefei University of TechnologyHefei 230009China MOE Joint International Research Laboratory of Animal Health and Food Safety College of Veterinary MedicineNanjing Agricultural UniversityNanjing 210095China Department of Chemistry Faculty of ScienceUniversity of Hradec KraloveHradec Kralove 50003Czech Republic College of life Science Yangtze UniversityJingzhou 434025China Wuxi Medical College Jiangnan UniversityWuxi 214122China Wuxi Translational Medicine Research Center and Jiangsu Translational Medicine Research Institute Wuxi Branch Wuxi 214013China

Aflatoxin B_(1)(AFB_(1))is a naturally-occurring mycotoxin and recognized as the most toxic foodborne toxin,particularly causing damages to *** podocytes are terminally differentiated epithelial ***_(1)induces podocyte inflammation,proteinuria and renal *** the mechanism of AFB_(1)-induced podocyte inflammation and murine kidney dysfunction,we detected that AFB_(1)increased ubiquitindependent degradation of the transcription factor RelA through enhanced interaction of RelA with E3 ubiquitin ligase tripartite motif containing 7(TRIM7)in mouse podocyte clone-5(MPC-5)and mouse *** of RelA resulted in decreasing microRNA-9(miR-9)and activating the chemokine receptor 4(CXCR4),thioredoxin interacting protein(TXNIP),and NOD-like receptor pyrin domain-containing 3(NLRP3)signaling axis(CXCR4/TXNIP/NLRP3 pathway),leading to podocyte *** also determined that downregulation of miR-9 led to CXCR4 expression and the downstream TXNIP/NLRP3 pathway *** of miR-9 or deletion of CXCR4 suppressed AFB_(1)-induced CXCR4/TXNIP/NLRP3 pathway,resulting in alleviating podocyte inflammation and kidney *** findings indicated that ubiquitin-dependent proteolysis of RelA,downregulation of miR-9,and activation of CXCR4/TXNIP/NLRP3 pathway played an essential role in AFB_(1)-induced glomerular podocyte *** study revealed a novel mechanism,via RelA,for the control of AFB_(1)’s nephrotoxicity,leading to an effective protection of food safety and public health.

关键词： Aflatoxin B_(1) Podocyte inflammation miRNA-9 Chemokine(C-X-C motif)receptor 4 RelA ubiquitin-dependent degradation