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Search Results: 1 - 10 of 134243 matches for " Li Zi-Quan "
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INFLUENCE OF VOLTAGES ON PERFORMANCE OF ANODIC FILMS OF Mg ALLOY BY CONSTANT VOLTAGE ANODIC OXIDATION
恒压阳极氧化对镁合金氧化膜的影响

WANG Tian-xu,Li Zi-quan,
王天旭
,李子全

腐蚀科学与防护技术 , 2009,
Abstract: The influence of voltages on anodic films of Mg alloy by constant voltage anodic oxidation was studied.By voltage of 10V,no sparks could be found on the surface of the sample,corresponding to a traditional anodizing.By voltages of 15,20 and 25V,a multitude of small sparks covered the entire surfaces of the samples.These can be described as a micro-arcing regime.The films formed by 10,15,20 and 25 V were mainly composed of Al2O3,Na4(AlSiO4)3(OH),Al2SiO5 and SiO2.It was found that corrosion resistance increas...
C/S model design based on OPC XML-DA specification
基于OPC-XML-DA规范的C/S模型设计

HU Zi-quan,LI Jin,HAN Leng,
胡自权
,李津,韩冷

重庆邮电大学学报(自然科学版) , 2006,
Abstract: OPC-C0M 紧密依赖.Windows平台,OPC基金会为提高访问OPC的能力提出了OPC-XML-DA规范。运 用群集和硬件冗余技术提出基于OPC-XML-DA规范的C/S实现模型并详细阐述了该模型,对OPC-XML和OPC-CON 两种数据传输规范进行了比较,从而得出,选用此模型在需跨不同平台通信时是高效可行的。 关键词#*+,’*+,$,*-’*+,$5-6’.:;’群集’冗余
Thermal relaxation of exchange bias field in an exchange coupled CoFe/IrMn bilayer

Qi Xian-Jin,WangYin-Gang,Zhou Guang-Hong,Li Zi-Quan,Guo Min,

中国物理 B , 2010,
Abstract: This paper reports that a CoFe/IrMn bilayer was deposited by high vacuum magnetron sputtering on silicon wafer substrate; the thermal relaxation of the CoFe/IrMn bilayer is investigated by means of holding the film in a negative saturation field at various temperatures. The exchange bias decreases with increasing period of time while holding the film in a negative saturation field at a given temperature. Increasing the temperature accelerates the decrease of exchange field. The results can be explained by the quantitative model of the nucleation and growth of antiferromagnetic domains suggested by Xi H W et al. 2007 Phys. Rev. B 75 014434], and it is believed that two energy barriers exist in the investigated temperature range.
Influence of Ga+ ion irradiation on thermal relaxation of exchange bias field in exchange-coupled CoFe/IrMn bilayers

Qi Xian-Jin,Wang Yin-Gang,Miao Xue-Fei,Li Zi-Quan,Huang Yi-Zhong,

中国物理 B , 2011,
Abstract: This paper reports that the CoFe/IrMn bilayers are deposited by magnetron sputtering on the surfaces of thermally-oxidized Si substrates. It investigates the thermal relaxations of both non-irradiated and Ga+ ion irradiated CoFe/IrMn bilayers by means of holding the bilayers in a negative saturation field. The results show that exchange bias field decreases with the increase of holding time period for both non-irradiated and Ga+ ion irradiated CoFe/IrMn bilayers. Exchange bias field is also found to be smaller upon irradiation at higher ion dose. This reduction of exchange bias field is attributed to the change of energy barrier induced by ion-radiation.
Influence of Ga+ ion irradiation on the magnetisation reversal process and magnetoresistance in CoFe/Cu/CoFe/IrMn spin valves

Qi Xian-Jin,Wang Yin-Gang,Miao Xue-Fei,Li Zi-Quan,Huang Yi-Zhong,

中国物理 B , 2010,
Abstract: Ga+ ion irradiation is performed on the surfaces of IrMn-based spin valves and the effects of ion irradiation on the magnetisation reversal process and magnetoresistance (MR) are investigated. The results show that the exchange bias field and magnetoresistance ratio of the spin valve decrease with the increase of ion dose. The width of the forward step between the free layer and the pinned layer becomes gradually smaller with the increase of ion dose whilst the recoil step tends to be narrower with ion dose increasing up to 6× 1013 ions/cm2 and the step disappears afterwards. Two peaks in the R--H curve are found to be asymmetric.
Thermally activated magnetization reversal in magnetic tunnel junctions

Zhou Guang-Hong,Wang Yin-Gang,Qi Xian-Jin,Li Zi-Quan,Chen Jian-Kang,

中国物理 B , 2009,
Abstract: In this paper, the magnetization reversal of the ferromagnetic layers in the IrMn/CoFe/AlOx/CoFe magnetic tunnel junction has been investigated using bulk magnetometry. The films exhibit very complex magnetization processes and reversal mechanism. Thermal activation phenomena such as the training effect, the asymmetry of reversal, the loop broadening and the decrease of exchange field while holding the film at negative saturation have been observed on the hysteresis loops of the pinned ferromagnetic layer while not on those of the free ferromagnetic layer. The thermal activation phenomena observed can be explained by the model of two energy barrier distributions with different time constants.
Comparison and Analysis of β-ketoacyl-ACP Synthase from Polyketide with Computer and Its Implication on Combinatorial Biosynthesis
聚酮化合物β-酮酰-ACP合酶的计算机对比分析与组合生物合成

TANG Ying,XIA Li-Qiu,WANG Hai-Long,HU Sheng-Biao,YU Zi-Quan,SUN Yun-Jun,
唐滢
,夏立秋,王海龙,胡胜标,余子全,孙运军

微生物学通报 , 2010,
Abstract: 为了合理地设计新的聚酮化合物提高组合生物合成的效率, 本文使用ClustalW、Mega 4.0分析了26种来自不同聚酮合酶的β-酮酰-ACP合酶结构域的序列特征, 并用ProtParam、Phdsec、Swiss-Model等工具对其中9种具有不同底物专一性的β-酮酰-ACP合酶的一级结构、二级结构和三级结构及活性位点进行了分析与预测。发现它们结构上的相似性大于序列上的相似性; 活性位点都富含丝氨酸; 底物含有2个羧酸基团的β-酮酰-ACP合酶的理论pI均小于5.0且其形式电荷总量也偏低; 序列V303ELHGTGTPLGDPIEAGA320是这26种β-酮酰-ACP合酶的一段保守序列, 但它并不与活性位点相邻。这些研究对进行聚酮合酶的模块或结构域替换以及定点突变具有重要的指导意义, 也为探讨其的进化机制提供了参考。
The Action of "Emei Mantle Plume" on the Separation of the Yangtze Plate from the Tarim Plate and Its Significance in Exploration
“峨眉地幔柱”对扬子板块和塔里木板块离散的作用及其找矿意义

LUO Zhi-li,LIU Shun,LIU Shu-gen,YONG Zi-quan,ZHAO Xi-kui,SUN Wei,
罗志立
,刘顺,刘树根,雍自权,赵锡奎,孙玮

地球学报 , 2004,
Abstract: 扬子板块与塔里木板块,目前直线相距约1900km(且末与成都间距离),但国内许多地学工作者从古生物群和沉积相的相似性,认为早古生代两板块相连或相距不远。本文从中国古生代板块构造演化史中出现的“兴凯地裂运动”和“峨眉地裂运动”,论述扬子板块和塔里木板块离散和汇聚中的运动学特征,从“峨眉地幔柱”理论阐述扬子板块向东漂移的动力学机制。扬子板块在二叠纪与塔里木板块离散并向东漂移的论断若能成立,则为古特提斯在中国境内首先打开提供依据;对全球一些地方(俄罗斯的通古斯、印度的潘加尔)二叠纪玄武岩大面积同时喷发有重大的地球动力学理论意义;研究二叠纪末一三叠纪初生物大绝灭事件具有重要作用;还可在阿尔金地块及其邻区找到攀枝花式的钒、钛磁铁矿及铜、镍、铂等金属矿床,对比四川盆地二叠系生物礁块气藏成藏条件,对塔里木盆地油气藏生成、运聚和保存等条件以及在下古生界寻找大油气田,均有启示作用。
PRIMARY STUDY ON THE DYNAMICS OF NATURAL GAS POOLS IN SICHUAN BASIN, CHINA
四川盆地天然气成藏动力学初探

LIU Shu-gen,XU Guo-sheng,XU Guo-qiang,YONG Zi-quan,LI Guo-rong,LI Ju-chu,
刘树根
,徐国盛,徐国强,雍自权,李国蓉,李巨初

天然气地球科学 , 2004,
Abstract: Sichuan superposition basin is one of the main natural gas production areas in China. The dynamics of natural gas pools is the critical studying content about the natural gas exploration in the basin. The upper Triassic Xujiahe formation in west Sichuan basin can be thought as an entire abnormal pressured compartment with natural gas. There are two abnormal pressured fluid compartments in vertical profiles of east Sichuan basin. The first one, called upper abnormal pressured fluid compartment, is located from lower Triassic Jialingjiang formation to Permian system. The second one, called lower abnormal pressured fluid compartment, is located in Silurian system. Carboniferous system is in the middle of the two abnormal pressured fluid compartments. Hydrocarbon-generation is the chief lifting pressure mechanism within compartments. The model of initial migration and expulsion is vertical in the tight clastic reservoir of west Sichuan basin and the carbonate reservoir of east Sichuan basin. The mode is made by the abnormal paleo-overpressure through the crack of abnormal pressured fluid compartments. The abnormal paleo-overpressure was the movement force, which made the adjustment of the fluids and the formation of natural gas reservoir pools within the upper Triassic Xujiahe formation. Buoyancy and hydrodynamics has controlled the formation of the natural gas reservoir pools in east Sichuan basin.
Screening and identification of phosphate accumulating bacterial strain GP44 and its characterization
一株聚磷菌GP44 的筛选、鉴定及其聚磷特性研究

ZHAO Hai-quan,HU Zi-quan,
赵海泉
,胡子全

土壤 , 2009,
Abstract: 采用纯培养结合蓝白斑筛选法从巢湖和南淝河底泥中分离筛选出能聚磷(P)的 11 株解 P 细菌,好氧培养时菌体吸 P 能力测定结果表明,GP44 的菌体含 P 量达到 11.92%,具有较高的聚 P 能力,对其初步鉴定为鉴定菌株 GP44 属肠杆菌科中的克雷伯氏菌属土生克雷伯氏菌(K.terrigena).GP44 在废水合成培养基上最佳聚 P 温度 30℃、初始 pH 为 7.5、最佳装液量为 120 ml/250 ml 和最适 C 源是葡萄糖,Mg2+、K+ 和 Fe3+ 有利于菌株 GP44 的生物除 P.
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