检索结果-南通市图书馆

Structure-Spin-Transport Anomaly in Quasi-One-Dimensional Ba9Fe3Te15 under High Pressure

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2020年第8期37卷 101-107页

作者： Jun Zhang Mei-ling Jin Xiang li Xian-cheng Wang Jian-Fa Zhao Ying liu Lei Duan Wen-Min li li-Peng Cao Bi-Juan Chen li-Juan Wang Fei Sun Yong-Gang Wang liu-Xiang Yang Yu-Ming Xiao zheng Deng Shao-Min Feng chang-Qing Jin Jin-Long Zhu Center for High Pressure Science&Technology Advanced Research Beijing 100094China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physics University of Chinese Academy of SciencesBeijing 100190China Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(Ministry of Education) School of PhysicsBeijing Institute of TechnologyBeijing 100081China Xi'an Modern Chemistry Research Institute Xi'an 710065China High Pressure Collaborative Access Team(HPCAT) Advanced Photon SourceArgonne National LaboratoryArgonneIllinois 60439USA Songshan Lake Materials Laboratory Dongguan 523808China Department of Physics Southern University of Science and TechnologyShenzhen 518055China

Recently,a series of novel compounds Ba3MX5(M=Fe,Ti,V;X=Se,Te)with hexagonal crystal structures composed of quasi-1-dimensional(1D)magnetic chains has been synthesized by our research team using high-pressure and high-temperature *** initial hexagonal phases persist to the maximum achievable pressure,while spin configurations and magnetic interactions may change dramatically as a result of considerable reductions in interchain separations upon *** compounds therefore offer unique possibilities for studying the evolution of intrinsic electronic structures in quasi-1D magnetic *** we present a systematic investigation of Ba9Fe3Te15,in which the interchain separations between trimerized 1D chains(~10.2Å)can be effectively modulated by external high *** crystal structure especially along the 1D chains exhibits an abnormal expansion at^GPa,which accompanies trimerization entangled anomalous mixed-high-low spin *** insulator-metal transition has been observed under high pressure as a result of charge-transfer gap ***-induced superconductivity emerges at 26 GPa,where the charge-transfer gap fully closes,3D electronic configuration forms and local spin fully collapses.

关键词： transition. hexagonal chains

在线全文

学校读者我要写书评

暂无评论

蒸汽流量对蒸汽直接接触冷凝的影响

航空动力学报 2016年第7期31卷 1610-1616页

作者：唐继国阎昌琪孙立成莫政宇哈尔滨工程大学核科学与技术学院核安全与仿真技术国防重点学科实验室哈尔滨150001 四川大学水利水电学院水力学与山区河流开发保护国家重点实验室成都610207

为研究蒸汽流量对蒸汽直接接触凝结及汽泡表面变化过程的影响,利用高速摄像仪记录一定过冷度、不同蒸汽流量条件时过冷水中蒸汽的凝结过程.实验结果表明:蒸汽流量小于0.36m^3/h时,汽泡表面始终较光滑;当蒸汽流量升至0.74m^3/h时,汽泡表... 详细信息

为研究蒸汽流量对蒸汽直接接触凝结及汽泡表面变化过程的影响,利用高速摄像仪记录一定过冷度、不同蒸汽流量条件时过冷水中蒸汽的凝结过程.实验结果表明:蒸汽流量小于0.36m^3/h时,汽泡表面始终较光滑;当蒸汽流量升至0.74m^3/h时,汽泡表面上出现波动,汽泡最终逐渐分裂成数个小汽泡;当蒸汽流量大于1.13m^3/h时,汽泡表面上的波动非常剧烈,汽泡不稳定性增强,并最终破碎成大量微汽泡.且随蒸汽流量增,这些微汽泡的直径减少,喷射速度增加.蒸汽流量超过1.13m^3/h后,汽泡在凝结时,其相对半径迅速减小,半径变化率迅速增加.汽泡表面剧烈的波动会极大的增加汽泡有效换热面积,导致蒸汽与过冷水间的传热和传质过程被极具的加强.

关键词：直接接触凝结汽泡表面汽泡破裂微汽泡蒸汽流量

Clinicopathological features and expression of regulatory mechanism of the Wnt signaling pathway in colorectal sessile serrated adenomas/polyps with different syndrome types

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2023年第9期11卷 1963-1973页

作者： Dan Qiao Xiao-Yan liu lie zheng Ya-li Zhang Ren-Ye Que Bing-Jing Ge Hong-Yan Cao Yan-cheng Dai Department of Gastroenterology Shanghai Traditional Chinese Medicine-Integrated HospitalShanghai University of Traditional Chinese MedicineShanghai 200082China Department of Gastroenterology Traditional Chinese Medicine Hospital of Xi’anXi’an 730000Shaanxi ProvinceChina Institute of Digestive Diseases Longhua HospitalShanghai University of Traditional Chinese MedicineShanghai 200032China

BACKGROUND Colorectal cancer(CRC)is the third most common cancer worldwide,with the fourth highest mortality among all ***,in addition to adenomas,serrated polyps,which account for 15%-30%of CRCs,can also develop into CRCs through the serrated *** serrated adenomas/polyps(SSAs/Ps),a type of serrated polyps,are easily misdiagnosed during *** To observe the difference in the Wnt signaling pathway expression in SSAs/Ps patients with different syndrome *** From January 2021 to December 2021,patients with SSAs/Ps were recruited from the Endoscopy Room of Shanghai Traditional Chinese Medicine-Integrated Hospital,affiliated with Shanghai University of Traditional Chinese *** cases each of large intestine damp-heat(Da-chang-Shi-Re,DCSR)syndrome and spleen-stomach weakness(Pi-Wei-Xu-Ruo)syndrome were *** comparison of the general data,typical tongue coating,colonoscopy findings,and hematoxylin and eosin findings was performed in each *** expression of the Wnt pathway-related proteins,namelyβ-catenin,adenomatous polyposis coli,and mutated in colorectal cancer,were analyzed using *** Significant differences were observed with respect to the SSAs/Ps size between the two groups of patients with different syndrome types(P=0.001).The other aspects did not differ between the two *** Wnt signaling pathway was activated in patients with SSAs/Ps belonging to both groups,which was manifested asβ-catenin protein translocation into the ***,SSAs/Ps patients with DCSR syndrome had more nucleation,higherβ-catenin expression,and negative regulatory factor(adenomatous polyposis coli and mutated in colorectal cancer)expression(Plinearly correlated with the related protein *** Patients with DCSR syndrome had a more obvious Wnt signaling pathway activation and a higher ri

关键词： Sessile serrated adenomas/polyps Wnt signaling pathway Large intestine damp-heat syndrome Spleen-stomach weakness syndrome

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

基于贝叶斯网络的路侧安全评价方法

公路交通科技 2008年第2期25卷 139-144,154页

作者：郑恒李长城刘煜中国航天标准化研究所北京100071 交通部公路科学研究院北京100088 暨南大学经济学院广东广州510632

首先阐述了路侧安全评价对于减少公路交通事故的重要意义,在对国内外相关研究进行分析和比较的基础上,构建了一个用于路侧安全性评价的指标体系。随后利用贝叶斯网络所具有的表达不确定性知识和进行不确定性知识推理的能力,提出了一种... 详细信息

首先阐述了路侧安全评价对于减少公路交通事故的重要意义,在对国内外相关研究进行分析和比较的基础上,构建了一个用于路侧安全性评价的指标体系。随后利用贝叶斯网络所具有的表达不确定性知识和进行不确定性知识推理的能力,提出了一种基于贝叶斯网络的安全评价模型。该模型能够处理复杂的逻辑关系,很好地表达变量间的不确定性关系,可以灵活方便地对系统进行预测及诊断分析,有效地处理专家意见不一致的情形,并能够在某些专家意见缺失的情况下得到合理的结果。最后将此方法应用于评估某路侧的安全等级,结果表明此方法是合理有效的。

关键词：交通工程安全评价贝叶斯网络(BN) 路侧概率推理

两种材料中界面裂纹能量释放率的仿真研究及与单一材料裂纹比较

在线全文

学校读者我要写书评

暂无评论

船舶力学 2007年第4期11卷 622-627页

作者：李成常向前郑艳萍郑州大学机械工程学院河南郑州450001 黄委会水科院工程力学研究所河南郑州450003

针对两种材料界面裂纹,采用弹性断裂理论和复变函数理论建立计算模型。用能量释放率来描述裂纹的扩展情况,并根据界面裂纹能量释放率解析计算方法对不同的材料性质和外荷载,以及不同的板厚度对裂纹扩展时的能量释放率进行了仿真分析,得... 详细信息

针对两种材料界面裂纹,采用弹性断裂理论和复变函数理论建立计算模型。用能量释放率来描述裂纹的扩展情况,并根据界面裂纹能量释放率解析计算方法对不同的材料性质和外荷载,以及不同的板厚度对裂纹扩展时的能量释放率进行了仿真分析,得到了能量释放率和两种材料的弹性模量、外荷载及板的厚度之间的关系变化的曲线。并对界面裂纹和单一材料裂纹的情况进行了分析和比较。

关键词：两种材料界面裂纹能量释放率仿真有限宽板复变函数

linezolid:A Review of Population Pharmacokinetic Studies

在线全文

学校读者我要写书评

暂无评论

Linezolid:A Review of Population Pharmacokinetic Studies

复合材料储能飞轮应力位移场分析及与均质材料飞轮比较

2018年中国药理学会定量药理学专业委员会学术年会

作者： li-li Zhang chang-cheng Sheng Ai-Wen Huang Xiao-Jiao li Hong-Tao Song zheng Jiao Department of Pharmacy the 900th Hospital of PLA joint logistics support force Department of Pharmacy Huashan HospitalFudan University Department of Pharmacy Guizhou Provincial People's Hospital Phase I Clinical Trial Unit First HospitalJilin University

Background linezolid is often used for the infections caused by drug-resistant Gram-positive *** studies suggested large interindividual pharmacokinetic variability for *** This review provides synthetic information on population pharmacokinetic(PK) studies of *** aims are to determine if there is a consensus on the structure model,which covariates have been identified and which covariates remains to be *** A literature search was conducted from PubMed,Web of Science,and Embase from their inception to 19 June *** studies were included in this review if they contained data analyzing PK parameters for linezolid in human beings using population PK *** lists of the selected articles were also *** Twenty studies in adults and one study in premature infants were ***-and onecompartment models were often used for the description of population pharmacokinetics of *** adults,first-order elimination was reported in 15 studies;other studies suggested Michaelis-Menten(MM) elimination,time-dependent autoinhibition elimination or parallel firstorder and MM *** clearance was well described by first-order elimination in premature *** covariates were tested and significant covariates in the final models included creatinine clearance(CL),total body weight(TBW),age,renal replacement therapy(dialysis,continuous veno-venous hemodiafiltration,or continuous veno-venous hemodialysis),liver function(ALT or the maximal liver function capacity(liMAx)),ideal body weight(IBW),hemoglobin,lactate,fibrinogen,the SOFA(sepsis organ failure assessment) score,the presence of acute respiratory distress syndrome(ARDS),peritonitis,liver transplantation/resection and liver *** these,CL and TBW was the most *** inclusion of these covariates,the interindividual variability of CL was 23.2%-58% for adults and 38.3% for premature *** This re

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

太阳能学报 2007年第10期28卷 1168-1172页

作者：李成常向前郑艳萍孟令启郑州大学机械工程学院郑州450002 黄委会水科院工程力学研究所郑州450003

根据非均质各向异性弹性理论建立了复合材料飞轮的计算模型,得到了复合材料飞轮在工作转速情况下应力和位移计算的解析公式,给出了任一点的径向、环向应力及径向位移。并按照所建立的计算模型对不同材料对应力、位移分布的影响进行了分... 详细信息

根据非均质各向异性弹性理论建立了复合材料飞轮的计算模型,得到了复合材料飞轮在工作转速情况下应力和位移计算的解析公式,给出了任一点的径向、环向应力及径向位移。并按照所建立的计算模型对不同材料对应力、位移分布的影响进行了分析比较。

关键词：复合材料飞轮均质材料飞轮高速旋转惯性力应力场和位移场

Petrogenesis of the microcrystalline-dioritic enclaves from Jiuling granitoids in the eastern segment of Jiangnan Orogen and constraints on magma source materials

在线全文

学校读者我要写书评

暂无评论

China Geology 2018年第3期1卷 374-391页

作者： zheng Duan Guang-fu Xing Sheng-bing liao Ping-li Chu Wen-cheng Huang Yan-hui Zhu Xu-jie Shu chang-bo li Nanjing Center of China Geological Survey Nanjing 210016China

Numerous dark enclaves with different shapes are found in Jiuling Neoproterozoic *** LAICP-MS U-Pb dating was conducted on zircons extracted from two microcrystalline enclave samples,yielding crystallization ages of 822.6±5.8 Ma and 822.2±6.2 Ma,*** consistent ages within analytical errors with the host granitoids suggested that they were the products of the same *** microcrystalline-dioritic enclaves commonly show plastic forms and contain similar plagioclase megacrysts to the host rocks,and both of the enclaves and host granitoids showed a complex composition and structural imbalance in ***,the apatites with a euhedral acicular shape occurred widely in the microcrystalline-dioritic *** of these petrographic features above imply magma mixing is involved in their *** enclaves and host granitoids show a marked zircon trace element difference and Hf isotopic signatures without correlation in zircon trace element pairs but form their own system between enclaves and host ***,most of the zircons show extremely high εHf (t) with εHf (t) =3.54?11.94 from the southern samples,and εHf (t) =1.0?9.09 from the central *** zircons with the higher εHf (t) are similar to the zircons from the juvenile island arc in the eastern segment of Jiangnan *** geological and Hf isotopic characteristics suggest microcrystalline-dioritic enclaves were derived from the partial melting process of the Mesoproterozoic crust which enriched juvenile island arc materials and mixed with the granitic magma that remelted from the Mesoproterozoic continental crust which relatively enriched ancient sediments and mixed with the host granitoid in diagenesis.

关键词： Zircon U-Pb age Zircon trace element compositions Hf isotopic compositions Magma mixing Jiuling Pluton

Genetic damage and early health effects by chromate based on exposure assessment

在线全文

学校读者我要写书评

暂无评论

Genetic damage and early health effects by chromate based on...