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A Simple Proof for the Stability of Global FIFO Queueing Networks

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Acta Mathematicae Applicatae Sinica 2009年第4期25卷 647-654页

作者： jian-kui yang School of Science Beijing University of Posts and Telecommunications Beijing 100876 China

We study the stability of multiclass queueing networks under the global FIFO （first in first out） service discipline, which was established by Bramson in 2001. For these networks, the service priority of a customer is determined by his entrance time. Using fluid models, we describe the entrance time of the most senior customer in the networks at time t, which is the key to simplify the proof for the stability of the global FIFO queueing networks.

关键词： queueing networks stability fluid models

太阳射电毫秒尖峰辐射的角方向和偏振的理论研究

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天文学报 1989年第2期30卷 181-187页

作者：史建魁赵仁扬中国科学院北京天文台

本文根据太阳磁拱镜点处非线性等离子体密度波传播期间,由损失锥分布的反射电子驱动的电子回旋微波激射不稳定性二次谐频波模支配太阳射电毫秒尖峰辐射的理论模型,着重研究了太阳毫秒尖峰辐射的角方向和偏振度问题.结果发现:O模辐射角方... 详细信息

本文根据太阳磁拱镜点处非线性等离子体密度波传播期间,由损失锥分布的反射电子驱动的电子回旋微波激射不稳定性二次谐频波模支配太阳射电毫秒尖峰辐射的理论模型,着重研究了太阳毫秒尖峰辐射的角方向和偏振度问题.结果发现:O模辐射角方向(波矢与磁场夹角)θ约为40°—60°,X模角方向θ约为40°—80°;当辐射角θ>60°时,辐射呈100%的X模偏振,当40°<θ<60°时,只要非线性等离子体密度波幅在一定的范围之内,辐射呈100%的O模偏振,超过一定的范围时,辐射的偏振度将会由100%的O模下降,甚至降为X模偏振.本文还研究发现辐射源区载能电子的自由能仅有0.1%转化为辐射波能.

关键词：太阳射电尖峰辐射角方向偏振度

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宣化钟楼记

天津大学学报 1982年第S1期 51-59页

作者：冯建逵杨道明

一九六六年五六月间,我们天津大学建筑系师生接受河北省宣化师范学院建校工程的设计任务,在宣化城外住了两个多月。工作之暇,曾经进城观光。市内通衢,钟楼耸峙,三重檐,歇山顶,前后抱厦,飞甍巍峨,造型瑰丽,和现存的各地钟鼓楼建筑颇不相... 详细信息

一九六六年五六月间,我们天津大学建筑系师生接受河北省宣化师范学院建校工程的设计任务,在宣化城外住了两个多月。工作之暇,曾经进城观光。市内通衢,钟楼耸峙,三重檐,歇山顶,前后抱厦,飞甍巍峨,造型瑰丽,和现存的各地钟鼓楼建筑颇不相埒,虽年久失修、装修隔扇,平座栏杆破损殆尽,但梁柱完好,屹立于经年风砂强劲的长城独石口之南,

关键词：斗拱钟楼正心瓜拱檐柱宣化平身科柱头科厢拱平座童柱矮柱卷杀举折角梁万拱

他莫昔芬对乳腺癌患者的雌激素受体α36的增强转移作用

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中国临床药理学杂志 2018年第9期34卷 1042-1044页

作者：王建逵李明杨晓娟杜鹃周绍强昆明医科大学第三附属医院云南省肿瘤医院乳腺外二科昆明650118

目的研究他莫昔芬对乳腺癌患者的雌激素受体α36(ERα36)增强转移作用。方法随机选取2010年1月至2015年1月入本院进行乳腺癌治疗的患者,将入选的200例患者随机分为试验组和对照组各100例。试验组口服他莫昔芬20 mg·d^(-1);对照组患者... 详细信息

目的研究他莫昔芬对乳腺癌患者的雌激素受体α36(ERα36)增强转移作用。方法随机选取2010年1月至2015年1月入本院进行乳腺癌治疗的患者,将入选的200例患者随机分为试验组和对照组各100例。试验组口服他莫昔芬20 mg·d^(-1);对照组患者予以安慰剂,每天2片,每天1次。在治疗5 d后,用荧光激活细胞分选仪分选取得ERα36细胞;用免疫组化技术检测ERα36的表达情况,对比2组患者乳腺癌的增殖转移能力和无转移生存期。结果ERα36的阳性表达和肿瘤大小(小于2 cm的例数):试验组与对照组分别为42,53例;11,24例;组间比较差异均有统计学意义(均P<0.05),表明ERα36的表达与乳腺癌细胞的恶化存在关联。试验组患者出现了58例转移,明显高于对照组的42例;试验组死亡28例,明显高于对照组的19例,差异均有统计学意义(均P<0.05)。多元回归分析表明,相比未接受他莫昔芬治疗的患者,接受他莫昔芬治疗的患者的无转移生存期明显缩短。结论他莫昔芬会使乳腺癌患者出现获得性和原发性耐药,对乳腺癌患者ERα36的增强转移起到了明显的不良作用。

关键词：他莫昔芬乳腺癌干细胞雌激素受体ERα36

Behavior of phosphorus enrichment in dephosphorization slag at low temperature and low basicity

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International Journal of Minerals,Metallurgy and Materials 2021年第1期28卷 66-75页

作者： Ge-fan Ye jian yang Run-hao Zhang Wen-kui yang Han Sun State Key Laboratory of Advanced Special Steel School of Materials Science and EngineeringShanghai UniversityShanghai 200444China

At low basicity and low temperature, the dephosphorization behavior and phosphorus distribution ratio(LP) between slag and molten steel in the double slag and remaining slag process were studied with a 180 t basic oxygen furnace industrial *** dephosphorization slags with different basicities were quantitatively *** the lower basicity range of 0.9–2.59, both LP and dephosphorization ratio were increased as the basicity of dephosphorization slag *** slag consisted of dark gray P-rich, light gray liquid slag,and white Fe-rich *** increasing basicity, not only did the morphologies of different phases in the dephosphorization slag change greatly, but the area fractions and P2O5 content of the P-rich phase also *** transfer route of P during dephosphorization can be deduced as hot metal → liquid slag phase + Fe-rich phase → P-rich phase.

关键词： dephosphorization basicity phosphorus-rich phase slag converter steelmaking

Spectroscopic and Electrochemical Studies of the Interaction Between Fuchsin Basic and DNA

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Chemical Research in Chinese Universities 2006年第3期22卷 292-296页

作者： yang Tao WANG Zeng-jian JIAO kui LI Qing-Jun College of Chemistry ＆ Chemical Engineering Ocean University of China Qingdao 266003 P. R. China College of Chemistry ＆ Molecular Engineering Qingdao University of Science ＆ Technology Qingdao 266042 P. R. China

Visible spectroscopic and electrochemical methods were used to study the interactions between DNA and fuchsin basic（FB）. FB has an irreversible electro-oxidation peak in 5 mmol/L Tris-HCl buffer solution at pH = 7.4 on a glassy carbon electrode（GCE）. After adding certain concentration of dsDNA, the oxidation peak current of FB decreases, but the peak potential hardly changes. The visible absorption spectroscopic study shows that the binding mode of FB to dsDNA is intercalative binding and electrostatic binding when the ratio of the concentration of dsDNA to FB is smaller than 0. 2, and anew substance, which produces a new absorption peak, is obtained via a covalent binding between dsDNA and FB apart from intercalative binding and electrostatic binding when the ratio of the concentration of dsDNA to FB is larger than 0. 2. The visible absorption spectra varies no longer when the ratio of the concentration of dsDNA＇to FB is larger than 1.5. A mean binding ratio of dsDNA to FB was determined to be 1.4： 1, suggesting that two complexes FB-dsDNA and FB-2dsDNA be formed. The interaction between FB and ssDNA was only electrostatic binding. The more powerful interaction of FB with dsDNA than with ssDNA may be applied for the recognition of dsDNA and ssDNA, and in DNA biosensor as hybridization indicator.

关键词： Fuchsin basic DNA Visible absorption spectroscopy Cyclic voltammetry Interaction

Inflammation:A novel target of current therapies for hepatic encephalopathy in liver cirrhosis

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World Journal of Gastroenterology 2015年第41期21卷 11815-11824页

作者： Ming Luo jian-yang Guo Wu-kui Cao Department of Gastroenterology Ningxia People’s Hospital Tianjin Liver Disease Institute Tianjin Second People’s Hospital

Hepatic encephalopathy(HE) is a severe neuropsychiatric syndrome that most commonly occurs in decompensated liver cirrhosis and incorporates a spectrumof manifestations that ranges from mild cognitive impairment to coma. Although the etiology of HE is not completely understood, it is believed that multiple underlying mechanisms are involved in the pathogenesis of HE, and one of the main factors is thought to be ammonia; however, the ammonia hypothesis in the pathogenesis of HE is incomplete. Recently, it has been increasingly demonstrated that inflammation, including systemic inflammation, neuroinflammation and endotoxemia, acts in concert with ammonia in the pathogenesis of HE in cirrhotic patients. Meanwhile, a good number of studies have found that current therapies for HE, such as lactulose, rifaximin, probiotics and the molecular adsorbent recirculating system, could inhibit different types of inflammation, thereby improving the neuropsychiatric manifestations and preventing the progression of HE in cirrhotic patients. The antiinflammatory effects of these current therapies provide a novel therapeutic approach for cirrhotic patients with HE. The purpose of this review is to describe the inflammatory mechanisms behind the etiology of HE in cirrhosis and discuss the current therapies that target the inflammatory pathogenesis of HE.

关键词： Inflammation Hepatic encephalopathy Pathogenesis T

A New Pregnane Glycoside from Fermented Leaves of Agave americana

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Chinese Chemical Letters 2002年第12期13卷 1189-1192页

作者： jian Ming JIN Xi kui LIU Chong Ren yang State Key Laboratory of Phytochemistry and Plant Resources of West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650204

A new minor pregnane glycoside was isolated from the fermented leaves of Agave americana. Its structure was elucidated as (20S)-5a-pregnane-3? 20-diol 20-O--D-glucopyrano- side (1) by spectral methods.

关键词： Agave americana L. pregnane glycoside.

New Conserved Quantities of Noether-Mei Symmetry for Nonholonomic Mechanical System

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Communications in Theoretical Physics 2008年第9期50卷 603-606页

作者： LIU yang-kui FANG jian-Hui PANG Ting LIN Peng College of Physics and Electonic Engineering Longdong University Qingyang 745000 China College of Physics Science and Technology China University of Petroleum Dongying 257061 China

Two new types of conserved quantities deduced by Noether-Mei symmetry of nonholonomic mechanicalsystem are *** definition and criterion of Noether-Mei symmetry for the system are given.A coordinationfunction is introduced,and the conditions under which the Noether-Mei symmetry leads to the two types of conservedquantities and the forms of the two types of conserved quantities are *** illustrative example is *** function can be selected according to the demand for finding the gauge function,and the choice of thecoordination function has multiformity,so more conserved quantities deduced from Noether-Mei symmetry of mechanicalsystem can be obtained.

关键词： nonholonomic mechanical system Noether-Mei symmetry new conserved quantity