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HL-3装置极向场电源环流控制研究

核聚变与等离子体物理 2024年第3期44卷 249-255页

作者：姚巨堃李维斌吴一郑雪核工业西南物理研究院成都610041

为了实现HL-3装置等离子体位形控制无死区,不仅需要HL-3装置极向场电源具备四象限有环流运行能力而且具备可控且快速过零的特点。根据HL-3 PF电源的拓扑结构和负载特点,推导了四象限电源的环流数学模型,提出了通过实时调节晶闸管导通角... 详细信息

为了实现HL-3装置等离子体位形控制无死区,不仅需要HL-3装置极向场电源具备四象限有环流运行能力而且具备可控且快速过零的特点。根据HL-3 PF电源的拓扑结构和负载特点,推导了四象限电源的环流数学模型,提出了通过实时调节晶闸管导通角来实现环流控制的策略。通过PSIM仿真平台搭建了电源有环流控制仿真模型。仿真结果表明,这种控制策略能够在不同控制目标下实现负载电流快速平稳过零且环流区间零点停留时间小于2ms。研究结果为HL-3装置先进位形等离子体放电稳定控制提供了保障。

关键词：四象限电源导通角调制环流控制

QT400-18L风电球墨铸铁件铸造工艺改进

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铸造设备与工艺 2024年第1期 6-8,14页

作者：魏立斌赵庆礼兰州电机股份有限公司甘肃兰州730314

针对QT400-18L风电球墨铸铁件,进行铸造工艺改进。在铸件底部、铸件内圈以及铸件外圈部位均匀放置外冷铁,增加铸型的激冷能力,减小金属液凝固区域,加快金属液结晶、凝固冷却速度。设计专用浇口杯结构,减少铁液与空气的接触面,有效防止... 详细信息

针对QT400-18L风电球墨铸铁件,进行铸造工艺改进。在铸件底部、铸件内圈以及铸件外圈部位均匀放置外冷铁,增加铸型的激冷能力,减小金属液凝固区域,加快金属液结晶、凝固冷却速度。设计专用浇口杯结构,减少铁液与空气的接触面,有效防止气体和熔渣卷入型腔,减轻液流对树脂砂型腔的冲击。控制砂型(芯)的硬度,减小石墨自膨胀。烘烤砂型,型腔水分,降低形成气孔的倾向。优化熔炼过程,获得更多石墨球的致密组织。通过上述工艺措施,有效预防了风电QT400-18L球墨铸铁件缩孔、疏松缺陷,提高了球墨铸铁件的成品率,降低了成本,成功完成了4.2MW前、后压盖等圆环类厚壁铸件的生产任务。

关键词： QT400-18L 风电铸件缩孔、疏松缺陷提高成品率工艺改进

冰雪体育旅游产业双循环发展体系的理论基础、构成要素、互动关系及驱动机制研究

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黑龙江生态工程职业学院学报 2024年第1期37卷 57-62页

作者：李炜斌邹青海晋中职业技术学院山西晋中030600 哈尔滨工程大学体育部黑龙江哈尔滨150001

运用文献资料、专家访谈等方法,探究冰雪体育旅游产业双循环发展体系的理论基础、构成要素、互动关系及驱动机制具有重要价值。研究认为:立足产业生态理论,冰雪体育旅游产业双循环发展体系由资源要素、行动主体要素、产品与服务要素、... 详细信息

运用文献资料、专家访谈等方法,探究冰雪体育旅游产业双循环发展体系的理论基础、构成要素、互动关系及驱动机制具有重要价值。研究认为:立足产业生态理论,冰雪体育旅游产业双循环发展体系由资源要素、行动主体要素、产品与服务要素、外部环境要素构成,互动关系体现在国内循环(产业链循环、产业内循环、产业间循环、区域循环)与国际循环共促发展中。驱动冰雪体育旅游产业双循环发展,增强循环内生动能,需发挥平台赋能机制、技术驱动机制、需求拉动机制、政策推动机制的驱动作用。

关键词：冰雪体育旅游产业双循环发展体系产业生态理论

Generation of an Entangled State of Two Three-Level Superconducting Quantum Interference Devices in Cavity

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Communications in Theoretical Physics 2006年第3期45卷 547-549页

作者： ZHAN Zhi-Ming li Jia-Hua li wei-bin School of Physics ＆ Information Engineering Jianghan University Wuhan 430056 China Department of Physics Huazhong University of Science and Technology Wuhan 430074 China Center for Cold Atom Physics the Chinese Academy of Sciences Wuhan 430071 China

We propose a scheme for generating a maximally entangled state of two three-level superconducting quantum interference devices （SQUIDs） by using a quantized cavity field and classical microwave pluses in cavity. In this scheme, no quantum information will be transferred from the SQUIDs to the cavity since the cavity field is only virtually excited. Thus, the cavity decay is suppressed during the entanglement generation.

关键词： entangle superconducting cavity

Generation of Entangled States of Multiple Superconducting Quantum Interference Devices in Cavity

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Communications in Theoretical Physics 2006年第4期45卷 709-711页

We propose a scheme for generating the maximally entangled states of many superconducting quantum interference devices （SQUIDs） by using a quantized cavity field and classical microwave pulses in cavity. In the scheme, the maximally entangled states can be generated without requiring the measurement and individual addressing of the SQUIDs.

关键词： entanglement superconducting cavity

Molecular Cloning and Characterization of Three Novel Genes Related to Fatty Acid Degradation and Their Responses to Abiotic Stresses in Gossypium hirsutum L.

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Journal of Integrative Agriculture 2013年第4期12卷 582-588页

作者： DONG Jia wei li-bin HU Yan GUO Wang-zhen State Key Laboratory of Crop Genetics & Germplasm Enhancement Hybrid Cotton R&D Engineering Research Center Ministry of Education/College of Agriculture Nanjing Agricultural University

Fatty acid metabolism is responsible not only for oilseed metabolism but also for plant responses to abiotic stresses. In this study, three novel genes related to fatty acid degradation designated GhACX, Gh4CL, and GhMFP, respectively, were isolated from Gossypium hirsutum acc. TM-1. The phylogenetic analysis revealed that amino acid sequences of GhACXand GhMFP have the highest homology with those from Vitis vinifera, and Gh4CL has a closer genetic relationship with that from Camellia sinensis. Tissue- and organ-specific analysis showed that the three genes expressed widely in all the tested tissues, including ovules and fiber at different developing stages, with expressed preferentially in some organs. Among them, GhACX showed the most abundant transcripts in seeds at 25 d post anthesis （DPA）, however, GhMFP and Gh4CL have the strongest expression level in ovules on the day of anthesis. Based on real-time quantitative RT-PCR, the three genes were differentially regulated when induced under wounding, methyl jasmonate （MeJA）, cold, and abscisic acid （ABA） treatments. The characterization and expression pattern of three novel fatty acid degradation related genes will aid both to understand the roles of fatty acid degradation related genes as precursor in stress stimuli and to elucidate the physiological function in cotton oilseed metabolism.

关键词： genes related to fatty acid degradation molecular cloning expression analysis abiotic stress cotton( Gossypium hirsutum L.)

Anomalous Wtb Couplings and b→sγin the Topcolor Assisted Technicolor Models

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Chinese Physics Letters 2001年第3期18卷 349-351页

作者： YUE Chong-Xing LU Gong-Ru li wei-bin College of Physics and Information Engineering He’nan Normal UniversityXinxiang 453002

Using the topcolor-assisted technicolor models,we give the anomalous Wtb couplings arising from the exchange of the new gauge bosons(ETC gauge boson,colorons and Z')and calculate their contributions to the b→sγbranching *** find that the contributions mainly come from colorons and the recent measured value of the b→sγbranching ratio gives a strong constraint on the masses of colorons.

关键词： gauge branching constraint

Entangled Fields in Multiple Cavities by Interaction with One Three-Level Atom

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Communications in Theoretical Physics 2006年第1期45卷 151-153页

作者： ZHAN Zhi-Ming li Jia-Hua YANG Wen-Xing li wei-bin School of Physics ＆ Information Engineering Jianghan University Wuhan 430056 China Department of Physics Huazhong University of Science and Technology Wuhan 430074 China Center for Cold Atom Physics the Chinese Academy of Sciences Wuhan 430071 China

We present a scheme to entangle fields in multiple cavities. Our scheme is based on the resonant interaction of a ≡-type three-level atom with the cavity fields for precalculated interaction time, which enables us to generate a quantum entangled Greenberger-Horn-Zeilinger （GHZ） state of fields in multiple cavities. In principle, the scheme can be also generalized to generate N-party GHZ state. The required experimental techniques are within the scope of what can be obtained in the microwave cavity QED set up.

关键词： cavity GHZ state ≡-type atom

Difference in microstructural characteristics of stamp-charged coke and gravity-charged coke with approximate macroscopic performance

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Journal of Iron and Steel Research International 2024年第5期31卷 1050-1062页

作者： Chong Zou Zheng-yan Huang Jian-yun li bin li Shi-wei liu Yuan She School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710311ShaanxiChina Technical Center of Shandong Iron and Steel Co. Ltd.(Laiwu Branch)Jinan271104ShandongChina

The microstructural characteristics including optical texture,porosity and pore structure and chemical structure of stamp-charged coke(SCC)and gravity-charged coke(GCC)with similar conventional macro-indicators were investigated,and the properties including micro-strength,reactivity of coke matrix and that after alkali enrichment were comparatively studied by various characterization *** anisotropic structure of SCC is composed of high content of fine mosaic texture,while the content of medium mosaic texture,coarse texture and fibrous texture is *** statistical average shows that the fine mosaic average of SCC(24.89%)is 3.78 times the GCC average(6.58%),and the coarse mosaic average(1.24%)is only about 1/3 of the GCC average(3.43%).The porosity of SCC is lower than that of GCC,but tamping process does not lead to the fact that the number of closed pores of SCC is significantly lower than that of *** the structure of SCC is compact,its pore number is large and the pore wall is *** of coke with diameter less than 150 nm seem unaffected by tamping *** aromatic structure of SCC was less ordered than that of GCC,which was speculated to be related to the addition of more low metamorphic coal in *** microscopic strength and structural strength of SCC are lower than those of *** reactivity of coke matrix is affected by the specific surface area,but it is not the determining factor of its *** improvement in dissolution reactivity of coke after potassium enrichment is independent of coke type.

关键词： Stamp-charged coke Optical texture Porosity Microstructure Reactivity