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A comparative study on kinetics and dynamics of two dump truck lifting mechanisms using MATLAB simscape

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Theoretical & Applied Mechanics Letters 2024年第2期14卷 146-156页

作者： Thong Duc Hong Minh Quang Pham son cong Tran Lam Quang Tran Truong Thanh Nguyen Faculty of Transportation Engineering Ho Chi Minh City University of Technology(HCMUT)Ho Chi Minh City 700000Vietnam Vietnam National University Ho Chi Minh City(VNU-HCM) Ho Chi Minh City 700000Vietnam Industrial Maintenance Training Center Ho Chi Minh City University of Technology(HCMUT)Ho Chi Minh City 700000Vietnam

In this paper,two lifting mechanism models with opposing placements,which use the same hydraulic hoist model and have the same angle of 50°,have been *** mechanical and hydraulic simulation models are established using MATLAB Simscape to analyze their kinetics and dynamics in the lifting and holding *** simulation findings are compared to the analytical calculation results in the steady state,and both methods show good *** the early lifting stage,Model 1 produces greater force and discharges goods in the container faster than Model ***,Model 2 reaches a higher force and ejects goods from the container cleaner than its counterpart at the end lifting *** established simulation models can consider the effects of dynamic loads due to inertial moments and forces generated during the system *** is crucial in studying,designing,and optimizing the structure of hydraulic-mechanical systems.

关键词： Dump truck Lifting mechanism Hydraulic MATLAB Simscape Kinetic dynamic analysis

Exploring the Interplay between Job Stress,Work Performance,and Attitudes toward Professional Psychological Help among Employees

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International Journal of Mental Health Promotion 2024年第7期26卷 531-545页

作者： cong Minh Le son Van Huynh Ky Luu Quynh-Nhi Ngoc Ho Van Thi Le Nguyen Vinh-Long Tran-Chi Center for Mental Health Research and Support University of Social Sciences and HumanitiesVietnam National University Ho Chi Minh CityHo Chi Minh City700000Vietnam Faculty of Psychology Ho Chi Minh City University of EducationHo Chi Minh City700000Vietnam Faculty of Tourism College of BusinessUniversity of Economics Ho Chi Minh CityHo Chi Minh City700000Vietnam Scientific Management Department Dong A UniversityDa Nang500000Vietnam

Objective:This study explores the interplay between job stress,job-related factors,work performance,and attitudes toward seeking professional psychological help among Vietnamese ***:A total of 374 employees in Vietnam were surveyed using random sampling and an online questionnaire from November 07 to November 28,*** data and self-reported from three scales:The New Job Stress Scale(NJSS),Work Performance(WP),and Attitudes Toward Seeking Professional Psychological Help(ATSPPH_SF)were ***:Significant variations were found across several variables,including forms of work,operating hours,education levels,monthly income,numbers of daily working hours,and the presence of a psychological counseling department within the *** analysis has highlighted direct relationships between key latent *** who were more open to seeking professional help tended to report higher levels of job *** negative relationship was found between job stress and attitudes toward seeking professional ***,work effort was positively associated with work *** analyses revealed the influence of co-worker support on role expectation conflict and work effort,role expectation conflict and work-life balance,as well as interactions between role expectation conflict and attitudes needed toward seeking professional *** analyses showed that work effort mediated relationships between openness to seeking professional help,co-worker support,work-life balance,role expectation conflict,and work *** toward seeking professional help also mediated relationships between work-life balance,job stress,and work ***:The study highlights the complex dynamics surrounding job stress,job-related factors,work performance,and attitudes toward seeking professional psychological help among Vietnamese *** highlights the importance of addressing help-seeking barriers,promoting work engagement

关键词： Stress co-worker support work-life balance role expectation conﬂict professional psychological help-seeking

Copper-based nanomaterials as peroxidase candidates for intelligent colorimetric detection and antibacterial applications

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Particuology 2024年第1期84卷 126-135页

作者： Yanyan Huang Huimin Zhong cong Jiang Jiahui Yang Jingwen Zhang Fei Zhao Chaoqun Liu College of Light Industry and Food Engineering Nanjing Forestry UniversityNanjing210037China College of Pharmacy Institutes of Environment and MedicineHenan UniversityKaifeng475004China

With natural polyphenol compound tannic acid(ta)as the ingredient,copper tannate(Cuta)nanolayer material was formed by self-assembly under the conditions of heating and copper *** ion and tannic acid could coordinate to form Cu-O-C structure which was similar to the Fe-N-C structure of natural heme *** addition,the obtained Cuta nanomaterial possessed excellent peroxidase-like catalytic activity and *** on this excellent enzymatic activity,Cuta nanomaterials could be used for colorimetric detection of hydrogen peroxide with a smartphone and decomposition of organic *** on the structural characteristics and catalytic activity,the copper tannate nanozymes could also serve as potential antibacterial reagents to effectively inhibit the growth of gram-negative and positive bacteria in a low hydrogen peroxide *** work may promote the exploration of novel peroxidase mimetics and broaden the applications of nanozymes.

关键词： Nanozyme Colorimetric detection Smartphone Antibacteria

S-E-MBR:一种基于E-MBR码的分布式存储系统扩容方法

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软件导刊 2024年第1期23卷 90-96页

作者：黎聪唐聃成都信息工程大学软件工程学院四川省信息化应用支撑软件工程技术研究中心四川成都610225

随着数据量的激增,以再生码为容错机制的分布式存储系统需要使用扩容技术扩充其存储容量。然而现有再生码扩容方法较少,在扩容时间与传输量方面有待提高。为此,针对在线分布式存储场景提出一种扩容方法 S-EMBR,以更高效的迁移方式降低... 详细信息

随着数据量的激增,以再生码为容错机制的分布式存储系统需要使用扩容技术扩充其存储容量。然而现有再生码扩容方法较少,在扩容时间与传输量方面有待提高。为此,针对在线分布式存储场景提出一种扩容方法 S-EMBR,以更高效的迁移方式降低迁移的数据块数量和I/O开销,减少校验更新时所需数据块,使其达到了理论数据块迁移量最优值。理论分析与实验结果表明,与RR与Scale-RS方法相比,S-E-MBR方法扩容时的数据传输量分别减少了52.7%~77.9%和41.3%~50.4%,扩容总时间分别减少了72.3%~75.4%和50.6%~53.5%,响应速度分别提升了39.2%和17.1%,可满足在线扩容场景需求。

关键词：再生码扩容方法分布式存储纠删码传输量

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DENSITY ESTIMATES FOR SOLUTIONS OF STOCHASTIC FUNCTIONAL DIFFERENTIAL EQUATIONS

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Acta Mathematica Scientia 2019年第4期39卷 955-970页

作者： Nguyen Tien DUNG ta cong son Tran Manh CUONG Nguyen Van taN Trinh Nhu QUYNH Department of Mathematics FPT University Hoa Lac High Tech Park Hanoi Vietnam Department of Mathematics VNU Hanoi University of Science 334 Nguyen Trai Thanh Xuan Hanoi Vietnam Department of Foundation Academy of Cryptography Techniques Hl Chien Thang Thanh Tri Hanoi Vietnam Military Information Technology Institute 17 Hoang Sam Cau Giay Hanoi Vietnam

In this article, we investigate the density of the solution to a class of stochastic functional differential equations by means of Malliavin calculus. Our aim is to provide upper and lower Gaussian estimates for the d... 详细信息

关键词： Stochastic functional differential equations density estimates Malliavin calculus

藏区重症监护病房首例耐碳青霉烯类鲍曼不动杆菌感染患者相关环境污染及患者感染情况

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中国感染控制杂志 2024年第2期23卷 220-224页

作者：切措塔何定英龙芙艳张小花彭春花蒋湘翔邓明雷付聪左国平九寨沟县人民医院医院感染管理科四川阿坝州623400 九寨沟县人民医院综合科九寨沟县人民医院检验科四川阿坝州623400 九寨沟县人民医院ICU 四川阿坝州623400 九寨沟县人民医院呼吸科四川阿坝州623400

目的调查藏区某院新建重症监护病房(ICU)中首例耐碳青霉烯类鲍曼不动杆菌(CRAB)感染患者相关环境污染及患者感染情况,分析传播风险。方法从2021年11月15日检出的首例CRAB患者入住ICU开始至第60天期间,对入住ICU>48 h的所有患者进行CRA... 详细信息

目的调查藏区某院新建重症监护病房(ICU)中首例耐碳青霉烯类鲍曼不动杆菌(CRAB)感染患者相关环境污染及患者感染情况,分析传播风险。方法从2021年11月15日检出的首例CRAB患者入住ICU开始至第60天期间,对入住ICU>48 h的所有患者进行CRAB主动筛查;在首例CRAB感染患者入住ICU第30天高频开展诊疗活动2 h后未消毒前、第60天消毒后未开展医疗活动前的环境分别采样,CRAB显色培养基培养。结果主动筛查的13例患者中1例CRAB阳性,该病例于11月19日由三级医院ICU转入该院ICU,入住ICU第40天出现发热、吸痰需求增加并检出CRAB,药敏谱与首例病例相似,且安置于首例病例邻床。采样环境标本64份,CRAB阳性9份,阳性率14.06%,其中高频诊疗活动后洗手池、门把手、床栏等8个采样位点CRAB阳性,常规消毒后洗手池水槽检出CRAB。结论在民族地区基层ICU CRAB防控工作中,对入科患者进行风险评估,高风险患者入科即采取集束化防控措施是可行的;应重点关注洗手池、门把手、床栏等区域污染及洗手池水槽消毒的有效性。

关键词：耐碳青霉烯类鲍曼不动杆菌环境污染医院感染重症监护病房民族地区基层医院

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东北喜剧网络电影的底层叙事策略

齐齐哈尔大学学报（哲学社会科学版） 2024年第5期 136-140页

作者：张聪徐锦博江西师范大学新闻与传播学院江西南昌330016 吉利学院数字媒体与表演学院四川成都641423

东北喜剧网络电影作为东北电影艺术的一个重要分支,借助“爱腾优”等网络视听平台的制作与宣发,展现出了与时代紧密相连的深厚文化生命力。这类影片主要描绘社会底层人物在逆境中的抗争与成长,通过父子情、兄妹情、中年夫妻情等多层次... 详细信息

东北喜剧网络电影作为东北电影艺术的一个重要分支,借助“爱腾优”等网络视听平台的制作与宣发,展现出了与时代紧密相连的深厚文化生命力。这类影片主要描绘社会底层人物在逆境中的抗争与成长,通过父子情、兄妹情、中年夫妻情等多层次情感主题,有机地融合了东北地域的工业与民俗特色。其鲜明的底层人物叙事策略,东北地域空间的文化景观以及“泛喜剧化”叙事手法的运用,不仅深刻地反映了东北地域文化的丰富底蕴,更传递了底层民众积极面对生活的乐观态度,为东北喜剧的持续发展注入了新的时代活力。

关键词：东北喜剧网络电影底层人物叙事空间泛喜剧化地缘文化

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湖南界牌岭大型锡-萤石矿床勘查模型与深部找矿预测

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矿床地质 2024年第1期43卷 128-143页

作者：侯占德赵正许以明何以勤磨现程郭聪中国地质大学(北京)地球科学与资源学院北京100083 中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室北京100037 湖南省矿产资源调查所湖南郴州410014

湖南界牌岭锡多金属矿床位于南岭成矿带中段,是近年来新发现的以锡和萤石为主,伴生锂、铍、铌、钽、锌等重要资源的大型矿床。该矿床矿化元素多且规模大、矿化分带性强、成矿时代也较新(~90 Ma),使其在湘南钨多金属矿集区内独具特色。... 详细信息

湖南界牌岭锡多金属矿床位于南岭成矿带中段,是近年来新发现的以锡和萤石为主,伴生锂、铍、铌、钽、锌等重要资源的大型矿床。该矿床矿化元素多且规模大、矿化分带性强、成矿时代也较新(~90 Ma),使其在湘南钨多金属矿集区内独具特色。文章在详细的矿床地质工作基础上,对界牌岭不同矿化段的萤石和锡石进行了矿物学研究和微区原位微量元素对比分析。研究结果显示,萤石由深到浅表现为明显的正Ce异常向负Ce异常、负Eu异常向正Eu异常转变,指示成矿流体向上运移过程中氧逸度逐渐升高。浅部矿体与深部花岗斑岩中萤石的稀土元素配分特征一致,指示两者均为深部富F花岗质岩浆的产物。相较于南岭地区云英岩型和石英脉型锡矿,界牌岭锡石中Nb-ta含量偏低,但高于矽卡岩型锡矿,具有富Fe、贫W的特征,较低的Zr/Hf值(平均为2.76)。对比研究认为,界牌岭锡矿体仍处于该岩浆热液系统中-远端,推测其深部至隐伏岩体仍具较大找矿空间。结合前人研究,文章综合构建了界牌岭锡萤石矿床成矿模式,并提出了相应的勘查标识,圈定了界牌岭深部近花岗岩体矽卡岩型-云英岩型-石英细脉型锡(钨)铌钽矿、北北东向主断裂北段深部锡多金属矿、斑岩体内及深部接触带锡锂铌钽矿3个方向的找矿预测靶区。

关键词：锡矿床矿物微量元素勘查模型找矿预测界牌岭

淘锡坑石英脉型钨矿床找矿新突破及“台阶式”勘查模型启示

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矿床地质 2024年第3期43卷 563-577页

作者：郭淑庆赵正郭聪李陈浩刘善宝刘战庆崇义章源钨业股份有限公司江西赣州341300 中国地质科学院矿产资源研究所自然资源部成矿作用与资源评价重点实验室北京100037 桂林理工大学地球科学学院广西隐伏金属矿产勘查重点实验室广西桂林541004

淘锡坑钨矿床是目前赣南地区可采规模最大的石英脉型黑钨矿矿床,主要由宝山、棋洞、烂埂子和枫林坑矿段组成。近年通过深边勘查,在矿区南东侧东峰矿段又取得了重要找矿突破,新增优质黑钨矿资源量(WO_(3))超1.4万吨。文章系统对比了淘锡... 详细信息

淘锡坑钨矿床是目前赣南地区可采规模最大的石英脉型黑钨矿矿床,主要由宝山、棋洞、烂埂子和枫林坑矿段组成。近年通过深边勘查,在矿区南东侧东峰矿段又取得了重要找矿突破,新增优质黑钨矿资源量(WO_(3))超1.4万吨。文章系统对比了淘锡坑各类矿体地质特征,重点对东峰矿段Ⅰ号脉带黑钨矿开展了矿物学研究,结合矿物微区原位微量元素分析,系统总结了石英脉内带型黑钨矿与外带型黑钨矿的地球化学差异。结果显示,内带型黑钨矿具有更低的Zr/Hf、Nb/ta和LREE/HREE比值,反映其成矿热液演化程度更高,与其更低的成矿温度相对应。东峰矿段黑钨矿由浅至深具有从外带型向内带型过渡的特征,其深部仍具有重要找矿潜力。结合赣南地区石英脉型钨矿发育特征,在“五层楼”模型基础上,笔者提出了适用于石英脉型钨矿深边部找矿的“台阶式”勘查模型,并建立了相应的勘查技术方法及黑钨矿矿物化学标志,为矿床-矿田尺度的钨矿勘查提供了新的理论依据。

关键词：黑钨矿地球化学特征勘查模型淘锡坑东峰

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