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Search Results: 1 - 10 of 47874 matches for " BAI Wen-ji "
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GEOCHEMICAL CHARACTER AND ORIGIN OF CUMULATES OF THE HONGGULELENG OPHIOLITE, XINJIANG, CHINA
新疆洪古勒楞蛇绿岩套中堆积杂岩的地球化学特征及成因

BAI Wen-ji,ZHOU Mei-fu,
白文吉
,周美付

地球学报 , 1991,
Abstract: The cumulative complex is well preserved in the Hongguleleng ophiolitic suite located in the Hebukesai County, Xinjiang. The complex is consisted of the following sequences from bottom to top: 1) assemblage of plagioclase dunite and plagioclase harzburgite in iuterlayering, 2) metatroctolitic and leucotroctolitic interlayers as a rhythmic stratified structure,3)olivine gabbro and then homogeneous gabbro layer. The basic lava (diabase) layer is overlaid on the homogeneous gabbro layer. The andisitic basalt layer overlying on the ophiolitic suite may be cogenetic.The cumulative complex is typical of PTO assemblage and is characterized by an Al-rich evolution trend. The chemical compositions of the cumulates from the bottom to top have a tendenoy to increase in the CaO, Al2O3, SiO2, TiO2, Na2O, K2O, B and Sr, and decrease in the MgO, FeO, Cr, Co, and Ni. The chemical variations of major, trace and rare earth elements for the cumulates show the systematic change similar to those of the lavered mafic and ultramafic intrusions.In this paper, the authers suggest that the cumulative sequences are formed by liquid or magma accumulation and explain the mechanism of the liquid accumulation origin.
Ultrahigh-pressure Minerals and New Minerals from the Luobusa Ophiolitic Chromitites in Tibet:A Review
西藏罗布莎蛇绿岩铬铁矿中的超高压矿物和新矿物(综述)

YANG Jing-sui,BAI Wen-ji,FANG Qing-song,RONG He,
杨经绥
,白文吉,方青松,戎合

地球学报 , 2008,
Abstract: 近十余年来的研究,在西藏雅鲁藏布江缝合带中的罗布莎蛇绿岩型铬铁矿中,发现可能来自深部(>300km深度)异常地幔矿物群.该矿物群中具有深部成因指示意义的矿物有:①呈斯石英假象的柯石英;②微粒金刚石和产在锇铱矿中的原位金刚石;③铬铁矿和饿铱矿巾发现硅尖晶石;④铬铁矿中发现硅金红石;⑤呈八面体假象的蛇纹石和绿泥石,并具有清晰的爆炸结构;⑥方铁矿和自然铁矿物组合.此外,罗布莎铬铁矿中有4个新矿物获批准,并在极地乌拉尔蛇绿岩铬铁矿中也发现了大最微粒金刚石和碳硅石等地幔超高压矿物.蛇绿岩铬铁矿中发现来自地幔深部的超高压矿物,提供了铬铁矿可能深部成因的重要信息,该发现有可能改变传统的蛇绿岩铬铁矿的形成于俯冲带上的浅部环境(<50 km深度)的认识以及蛇绿岩成因的概念.
EXACT SOLUTION OF OSCILLATIONS IN RELAY SERVOMECHANISMS WITH BACKLASH
含有間隙的继电系統中周期振蕩的准确解

CHEN WEN-JI,
陈文杰

自动化学报 , 1965,
Abstract: 在崔普金理论的基础上,提出一种求解具有间隙的继电系统中强制振荡与自振荡参数的准确方法。同时亦讨论了间隙对周期现象的影响。所讨论的系统中,继电器具有理想继电特性(有回环及无回环);线性部分传递函数形如K/p(T1p+1)。得出了系统存在强制振荡及自振荡的参量域。
Polymorphic Type for a Kind of Recursive Functions
一类递归函数的多态类型

HUANG Wen-Ji,
黄文集

软件学报 , 2004,
Abstract: Based on recursive functions defined on context-free language, LFC (language for context free recursive function) is a formal specification language and fits for dealing with phrase structure. LFC is yet another functional language with many general characteristics. It has been implemented in SAQ (specification acquisition system).The original type system for LFC is not polymorphic. With type variables, the original type system can be augmented and become a polymorphic type system. The type checking algorithm and some problems about implementation are also discussed. Polymorphic type system makes LFC more agile and predicts good future in the applications of LFC.
Ultra-High Pressure Minerals: FeO, Fe, FeSi, Si and SiO2 Assemblage from Ophiolite in Tibet and Its Earth Dynamic Significance
西藏蛇绿岩的超高压矿物:FeO、Fe、FeSi、Si和SiO2组合及其地球动力学意义

BAI Wen-ji,YANG Jing-rui,FANG Qing-song,YAN Bing-gang,ZHANG Zhong-ming,
白文吉
,杨经绥,方青松,颜秉刚,张仲明

地球学报 , 2002,
Abstract: 在西藏雅鲁藏布江蛇绿岩带的东段,出露罗布莎蛇绿岩块和豆荚状铬铁矿床。从豆荚状铬铁矿石中查明60-70种伴生矿物,其中包含FeO、Fe、FeSi、Si和SiO2组合。根据超高压-高温实验,该组合应形成于地球外核与下地幔之间的D“层,是地球外核的液态铁与镁硅酸盐钙钛矿(MgSiO3)相互化学反应的产物。西藏该超高压矿物组合揭示了蛇绿岩地幔活动可能深达地球外核。罗布莎蛇绿岩的该矿物组合可能是地幔-外地核之间的产物,或者是被对流作用,亦是被起源于D“层的地幔柱活动带到上地幔的。铬铁矿在地幔中结晶,并捕获了该矿物组合。
The Native Iron and Wustite Assemblage: Records of Oxygen Element from the Mantle
记录地幔中存在氧元素的自然铁-方铁矿组合

BAI Wen-ji,REN Yu-feng,YANG Jing-sui,FANG Qing-song,YAN Bing-gang,RONG He,
白文吉
,任玉峰,杨经绥,方青松,颜秉刚,戎合

地球学报 , 2006,
Abstract: A very complicated mantle mineral group including the native iron and wustite assemblage was recently discovered in chromitites from the mantle harzburgite of Luobusa ophiolite, Tibet. It is considered that this group was probably derived from the lower mantle and outer core, and then transported to the upper mantle by mantle plume. The assemblage structure shows that the liquid iron from the outer core dissolved some oxygen. When the liquid iron droplets spurted from the outer core into the mantle, they were decomposed into oxygen and iron in the form of immiscibility. Following decompression and ascent of the droplets, wustite (or NiAs structure) was produced by the chemical reaction between the liquid iron and liquid oxygen. When the oxygen was consumed up by the wustite, some holes remained and showed eyeball structures. The eyeball structures might have recorded the history of oxygen activity in the mantle and the Earth's core.
Explosion of Ultrahigh Pressure Minerals in the Mantle
地幔内超高压矿物的爆炸

BAI Wen-ji,YANG Jing-rui,FANG Qing-song,YAN Bing-gang,ZHANG Zhong-ming,
白文吉
,杨经绥,方青松,颜秉刚,张仲明

地球学报 , 2001,
Abstract: The microexplosion structure (cobweb structure) of ultrahigh pressure minerals was found for the first time in podiform chromitites within the mantle peridotite facies of Luobusa ophiolite along the Yarlung Zangbo suture zone. The explosion structures of high-energy silicate inclusions are commonly seen in thin sections. In explosion structure, chrome-spinel fragments are irregularly scattered in silicate minerals. With sharp edges and highly varied sizes, they are very unevenly distributed, showing distinct extention micro-brecciated structure. In addition, there are many tensional microfractures around the explosion silicate inclusions. It is inferred that, before explosion, the primary mantle minerals were hydrous magnesium silicate or magnesium-aluminium silicates. When such high-energy phase rose and passed the "water line" as a result of the action of mantle plume, explosion took place, accompanied by the release of water. The upward migration of large-sized high energy hydrous minerals may lead to deep-focus earthequakes.
Period halving of Persistent Currents in Mesoscopic Mobius ladders
DENG Wen-Ji,XU Ji-Huan,LIU Ping
Physics , 2002, DOI: 10.1088/0256-307X/19/7/333
Abstract: We investigate the period halving of persistent currents(PCs) of non-interacting electrons in isolated mesoscopic M\"{o}bius ladders without disorder, pierced by Aharonov-Bhom flux. The mechanisms of the period halving effect depend on the parity of the number of electrons as well as on the interchain hopping. Although the data of PCs in mesoscopic systems are sample-specific, some simple rules are found in the canonical ensemble average, such as all the odd harmonics of the PCs disappear, and the signals of even harmonics are non-negative. {PACS number(s): 73.23.Ra, 73.23.-b, 68.65.-k}
Universal behaviors of generalized EZ model for crowding and information transmission in financial markets
推广的EZ模型中的普适性行为

Deng Wen-Ji,
邓文基

物理学报 , 2002,
Abstract: The dynamical model for crowding and information transmission in financial markets(Eguiluz and Zimmermann, Phys.Rev.Lett. 85,5659(2000)) is generalized, and the corresponding master equations of the distribution function of crowd size are solved carefully. It's proven that the quantity of re-scaled crowd size shows the expected universal behaviors.
PROBABILITY CURRENTS AND CONSERVATION OF PROBABILITY IN HILBERT SPACE
希尔伯特空间中的概率流和概率守恒

DENG WEN-JI,
邓文基

物理学报 , 2001,
Abstract: The general formula of probability current operator is obtained by generalizing the concept of probability current and the theorem of probability conservation.With the help of this new formula,we derive a probability current operator for the tight-binding models of single electron system and interacting-multi-electron system,and then prove,in a very simple way,the normalization condition of reflection-transmission currents.
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