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可变换3-PRS并联机构的运动学及动力学仿真研究 被引量:5
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作者 孙付伟 陈国强 +2 位作者 代军 孟凡茂 刘念 《制造业自动化》 CSCD 2019年第2期70-76,共7页
以可变换3-PRS并联机构为研究对象,概述了该并联机构的结构形式,分析了该并联机构的逆向运动学和正向运动学。利用动力学仿真软件ADAmS建立了该并联机构的仿真模型,并进行了该并联机构的正向运动学、逆向运动学和动力学仿真分析,获得了... 以可变换3-PRS并联机构为研究对象,概述了该并联机构的结构形式,分析了该并联机构的逆向运动学和正向运动学。利用动力学仿真软件ADAmS建立了该并联机构的仿真模型,并进行了该并联机构的正向运动学、逆向运动学和动力学仿真分析,获得了该并联机构的运动学和动力学特性规律曲线,并与求解结果进行比较。结果表明,仿真结果与求解结果一致,证明了所建立数学模型的正确性,为该并联机构的下一步研究奠定了基础。 展开更多
关键词 可变换3-PRS并联机构 运动学 动力学 仿真
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酸液辅助电化学氧化法脱除单质汞性能研究
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作者 张倩倩 张安超 +4 位作者 孟凡茂 刘艳雯 孙志君 李海霞 郑海坤 《燃料化学学报(中英文)》 EI CAS CSCD 北大核心 2023年第10期1496-1505,共10页
以铂片为阴极,氟掺杂二氧化锡(FTO)玻璃为阳极,提出了一种新型酸液辅助电化学氧化法(AEO)脱除单质汞(Hg^(0))技术,探讨了酸类型、硝酸浓度、外加直流电压、电解质类型、SO_(2)、NO和O_(2)对脱汞效率的影响。研究结果表明,随着直流电压... 以铂片为阴极,氟掺杂二氧化锡(FTO)玻璃为阳极,提出了一种新型酸液辅助电化学氧化法(AEO)脱除单质汞(Hg^(0))技术,探讨了酸类型、硝酸浓度、外加直流电压、电解质类型、SO_(2)、NO和O_(2)对脱汞效率的影响。研究结果表明,随着直流电压和硝酸液浓度的升高,脱汞效率逐渐上升;硝酸浓度增加至0.15 mol/L后,脱汞效率保持不变;SO_(2)和NO抑制了AEO体系中Hg^(0)的去除,但这种抑制是可逆的。与单独实验条件的脱汞效率相比,在0.1 mol/L硝酸、4 V直流电压的实验条件下,电化学氧化脱汞的效率可达96%,硝酸与直流电压的协同作用起关键作用。基于实验结果,分析了AEO系统中脱除Hg^(0)的机理:在阳极,Hg^(0)被阳极表面氧化反应产生的羟基自由基(·OH)氧化去除;在阴极,溶解性氧或吸附在Pt表面的O_(2)经还原反应生成阴离子超氧自由基(·O_(2)-)。在酸性条件下,电子会促进·O_(2)-生成·OH。自由基捕获实验表明,·O_(2)-和·OH是酸液辅助电化学法去除Hg^(0)的主要活性物质。研究有助于开发有效的工业除汞电化学技术和工业废酸的循环再利用。 展开更多
关键词 元素汞 湿法脱除 废酸 电化学氧化
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The Application of the STM to English Teaching in Primary School
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作者 BAI Jin-Xin meng fan-mao 《Sino-US English Teaching》 2018年第5期236-242,共7页
The Situational Teaching Methodology(STM)is a neoteric and effective teaching method,which aims to create situations to arouse the students’interest of learning.In the process of English teaching,the STM emphasizes o... The Situational Teaching Methodology(STM)is a neoteric and effective teaching method,which aims to create situations to arouse the students’interest of learning.In the process of English teaching,the STM emphasizes on the real situation of language learning,and facilitates students’listening and speaking skills by creating situations.It can create the vivid scene during teaching to help students understand the teaching materials in the textbooks.In primary-school English teaching,it is vital to use the proper method to teach pupils to learn English according to their characters. 展开更多
关键词 the STM ENGLISH TEACHING pupils’interest of learning
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The Double Life of Veronique in Jordan and Hemingway On the Autobiographic Implications in For Whom the Bell Tolls
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作者 WANG Chao-fan meng fan-mao 《Sino-US English Teaching》 2016年第3期225-232,共8页
Ernest Hemingway is one of the greatest American novelists. His For Whom the Bell Tolls, a novel on Spanish Civil War, is generally regarded as "his most ambitious artistic endeavor and a heroic epic of the 20th cent... Ernest Hemingway is one of the greatest American novelists. His For Whom the Bell Tolls, a novel on Spanish Civil War, is generally regarded as "his most ambitious artistic endeavor and a heroic epic of the 20th century American literature". The protagonist, Jordan, is a brave, unselfish, and stressful fighter for fascist, who is the more mature epitome of Ernest Hemingway in the reality. It is an example of application of"meta-fiction". Both of their views on war change from being pessimistic to being optimistic; both Hemingway and Jordan are the heroes of "Grace under Pressure" and both of them start to care for the society and love others. 展开更多
关键词 HEMINGWAY JORDAN WAR EPITOME meta-fiction
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On Island Constraints and Violations'
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作者 LIN Hui meng fan-mao 《Journal of Literature and Art Studies》 2018年第1期146-152,共7页
There are some grammatical rules of pure syntactic restrictions on grammar rules of operation, a complex one of which is the fronting, i.e., extraction from the island. This paper centers on the "island" that is the... There are some grammatical rules of pure syntactic restrictions on grammar rules of operation, a complex one of which is the fronting, i.e., extraction from the island. This paper centers on the "island" that is the terminology in syntactic theory, and mainly focuses on the definition, the types and the analyses of the "island" 展开更多
关键词 ISLAND TOPICALIZATION CONSTRAINTS VIOLATION
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Using GM to Analyze EST Texts
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作者 JIAO Mei-na meng fan-mao 《Sino-US English Teaching》 2016年第7期560-566,共7页
The role of the grammatical metaphor (GM) theory to systemic-functional linguistics (SFL) as well as to metaphor studies has been generally acknowledged. Based on the framework of GM theory in SFL, this thesis, by... The role of the grammatical metaphor (GM) theory to systemic-functional linguistics (SFL) as well as to metaphor studies has been generally acknowledged. Based on the framework of GM theory in SFL, this thesis, by conducting a statistical analysis of the distribution of 13 types of GM in 20 English for science and technology (EST) texts which are chosen at random and aimed at different readers, is intended, on the one hand, to test and verify the applicability and feasibility of Halliday's grammatical metaphor theory as well as the correctness of Halliday-Martin's claim and on the other, to analyze the reasons for using GM, especially experiential GM substantially in EST texts. 展开更多
关键词 systemic-functional grammar grammatical metaphor EST texts
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Comparison of Chinese LBs and English RBs
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作者 LI Yun-xia meng fan-mao 《Journal of Literature and Art Studies》 2024年第6期450-454,共5页
As English and Chinese belong to different language families,the left and right branching structures in the two languages are both similar and different.Generally speaking,Chinese has a predominance of left-branching ... As English and Chinese belong to different language families,the left and right branching structures in the two languages are both similar and different.Generally speaking,Chinese has a predominance of left-branching structures and English has a predominance of right-branching structures.That is to say,Chinese is used to using left branches in its expressions,while English is used to using right branches in its expressions. 展开更多
关键词 Left Branch(LB) Right Branch(RB) MODIFIER ADVERBIAL CLAUSE
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