检索结果-南通市图书馆

A scheme to describe equilibrium dynamic states as phases in condensed matter systems

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2023年第2期66卷 141-142页

作者： hai-tao Quan School of Physics PekingUniversityBeijing100871China

How condensed matter exists in equilibrium is a fundamental question in *** textbook knowledge is constructed based on two key points:phase in denoting the homogeneous states of matter,and phase transition in marking ... 详细信息

关键词： equilibrium Figure condensed

Quantum corrections to the entropy in a driven quantum Brownian motion model

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2021年第9期73卷 136-144页

作者： Tian Qiu hai-tao Quan School of Physics Peking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China Frontiers Science Center for Nano-optoelectronics Peking UniversityBeijing100871China

The quantum Brownian motion model is a typical model in the study of nonequilibrium quantum *** is one of the most fundamental physical concepts in *** this work,by solving the quantum Langevin equation,we study the von Neumann entropy of a particle undergoing quantum Brownian *** obtain the analytical expression of the time evolution of the Wigner function in terms of the initial Wigner *** result is applied to the thermodynamic equilibrium initial state,which reproduces its classical counterpart in the high temperature *** on these results,for those initial states having well-defined classical counterparts,we obtain the explicit expression of the quantum corrections to the entropy in the weak coupling ***,we find that for the thermodynamic equilibrium initial state,all terms odd inÿ are exactly *** results bring important insights to the understanding of entropy in open quantum systems.

关键词： quantum Brownian motion time-dependent evolution quantum entropy

RNA结合蛋白KHSRP激活JAK1/STAT3通路促进胃贲门腺癌的生长与转移

在线全文

学校读者我要写书评

暂无评论

中国药理学通报 2025年第1期41卷 71-80页

作者：王晓龙王梦瑶张海峰刘洋洋李丽韦海涛河南大学淮河医院胸外科河南开封475004 河南大学护理与健康学院河南开封475004

目的探讨KHSRP靶向调控JAK1/STAT3信号轴对胃贲门腺癌细胞迁移和侵袭等恶性生物学行为的影响。方法比较胃贲门腺癌组织和癌旁组织中KHSRP的表达水平。qRT-PCR法检测胃贲门腺癌细胞系(OE-19、TE-7、BIC-1、FLO-1、SK-GT-4、BE-3)与正常... 详细信息

目的探讨KHSRP靶向调控JAK1/STAT3信号轴对胃贲门腺癌细胞迁移和侵袭等恶性生物学行为的影响。方法比较胃贲门腺癌组织和癌旁组织中KHSRP的表达水平。qRT-PCR法检测胃贲门腺癌细胞系(OE-19、TE-7、BIC-1、FLO-1、SK-GT-4、BE-3)与正常胃黏膜上皮细胞系(GES-1)中KHSRP的表达差异。通过包装慢病毒载体对KHSRP进行敲降和过表达处理,分为sh-NC组、sh-KHSRP组和Vector组、KHSRP组。采用细胞计数试剂盒-8(CCK-8)、Transwell实验测定KHSRP对胃贲门腺癌细胞增殖、迁移和侵袭的影响。异种移植肿瘤模型检测敲降和过表达KHSRP在活体动物体内的作用。Western blot实验验证KHSRP靶向JAK/STAT信号通路。结果与邻近正常组织相比,KHSRP在GCA组织中的表达显著增高(P<0.05)。细胞功能实验分析显示,KHSRP过表达在体外显著促进GCA细胞增殖、迁移和侵袭(P<0.05)。在敲降KHSRP后,JAK/STAT信号通路中JAK1、STAT3磷酸化水平明显降低,过表达KHSRP后情况则反之(P<0.05)。结论KHSRP通过激活JAK1/STAT3信号轴调控胃贲门腺癌转移的恶性进程。

关键词：胃贲门腺癌 KHSRP JAK1/STAT3 恶性进展增殖侵袭迁移

The evolution of microstructure and mechanical properties during high-speed direct-chill casting in different Al–Mg_2Si in situ composites

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

International Journal of Minerals,Metallurgy and Materials 2018年第9期25卷 1080-1089页

作者： Dong-tao Wang hai-tao Zhang Lei Li hai-lin Wu Ke Qin Jian-zhong Cui Key Laboratory of Electromagnetic Processing of Materials Ministry of Education Northeastern University

The effect of high-speed direct-chill(DC) casting on the microstructure and mechanical properties of Al–Mg_2Si in situ composites and AA6061 alloy was investigated. The microstructural evolution of the Al–Mg_2Si composites and AA6061 alloy was examined by optical microscopy, field-emission scanning electron microscopy(FE-SEM) and transmission electron microscopy(TEM). The results revealed that an increase of the casting speed substantially refined the primary Mg_2Si particles(from 28 to 12 μm), the spacing of eutectic Mg_2Si(from 3 to 0.5 μm), and the grains of AA6061 alloy(from 102 to 22 μm). The morphology of the eutectic Mg_2Si transformed from lamellar to rod-like and fibrous with increasing casting speed. The tensile tests showed that the yield strength, tensile strength, and elongation improved at higher casting speeds because of refinement of the Mg_2Si phase and the grains in the Al–Mg_2Si composites and the AA6061 alloy. High-speed DC casting is demonstrated to be an effective method to improve the mechanical properties of Al–Mg_2Si composites and AA6061 alloy billets.

关键词： Al–Mg2Si in situ composite casting speed grain size primary Mg2Si mechanical property

On Mutually Orthogonal Extraordinary Supersquares

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2021年第4期37卷 697-705页

作者： Jin-ping FAN hai-tao CAO Department of Mathematics Shanghai Normal UniversityShanghai200234China Institute of Mathematics Nanjing Normal UniversityNanjing210023China

Let Fd be the finite field with d *** subgroups in Fd×Fd play an important role in the field of quantum information theory,especially for the study of mutually unbiased ***,Ghiu et *** the concept of supersquare of order d which is related to extraordinary *** have given a method of construction of the mutually orthogonal supersquares,and determined all the complete sets of mutually orthogonal extraordinary supersquares of order *** this article,we present the construction of a complete set of mutually orthogonal extraordinary supersquares of order pn where p is a *** also determine all the complete sets of mutually orthogonal extraordinary supersquares of order 9.

关键词： extraordinary subgroup supersquare mutually orthogonal extraordinary supersquare finite field

Relative position determination between Chang'E-3lander and rover using in-beam phase referencing

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2015年第9期58卷 161-170页

作者： ZHOU Huan LI hai tao DONG GuangLiang Beijing Institute of Tracking and Telecommunications Technology

Chang'E-3 is China's first lunar surface exploration mission, as a part of the second phase of China's Lunar Exploration Program(CLEP). It landed successfully in the northwest of Mare Imbrium on December 14,2013, incorporating two probes, a lander and a rover named Yutu. The execution of the cooperative science tasks required an accurate determination of the relative position between the lander and the rover. In-beam phase referencing experiments have been conducted with the Chinese VLBI Network(CVN) to accurately image the rover in reference to the stationary lander in order to obtain their offsets in Right Ascension and Declination,which were then transformed into the lunar local coordinate system to acquire their relative position on the lunar surface. The observations and the data processing procedures are described in this paper. Images of the rover in six epochs between December 15 and 21, 2013 were made, resulting in accurate positions of the rover that are consistent with the visual localization approach. Through measurement of the locations of the rover's omnidirectional antenna with respect to the lander's directional antenna before their separation, and the recognition of the rover's turning actions during its exploratory moves, we demonstrate that the accuracy of relative position determined in this way could reach the meter level and the resolution is better than 1 m.

关键词： Chang’E-3 relative position determination in-beam phase referencing Chinese VLBI Network lunar exploration

The Effects of Metal Ions and Secondary Ligands on the Formation of Structures Resulted from Flexible Building Blocks

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2005年第12期24卷 1462-1467页

作者： LI Feng LI tao-hai CAO Rong State Key Laboratory of Structural Chemistr3 Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fujian Fuzhou 350002 China

Two coordination polymers have been synthesized from cpg/4,4＇-bipy/metal ions reaction system, [Zn（cpg）（4,4＇-bipy）0.5（H2O）]·H2O 1 and [Cd（cpg）（4,4＇-bipy）0.5（H2O）2]·H2O 2. X- ray analyses show that different coordination geometries of zinc and cadmium ions lead to similar ladder structures （tetra-for zinc ion and hexa- for cadmium ion）, in which all the flexible cpg molecules exist as single conformations of anti-form.

关键词： hydrothermal synthesis flexible ligand prediction

Dual-mode predictive control of a rotor suspension system

在线全文

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2020年第1期63卷 178-189页

作者： Yue WU Gui-Ping REN hai-tao ZHANG Key Laboratory of Image Processing and Intelligent Control School of Artificial Intelligence and AutomationHuazhong University of Science and Technology State Key Laboratory of Digital Manufacturing Equipments and Technology

Rotor active magnetic bearing(rotor-AMB) systems are frequently used to alleviate vibrations for various applications such as in national defense, manufacturing industries, IC production, and aerospace engineering. One obstacle to improve machining efficiency and quality is the open-loop instability of rotorAMB systems during the machining process. We built a closed-loop processing platform using a spindle rotor installed with AMBs and thereby developed a rotor-AMB suspension system embedded with a dual-mode predictive controller(DMPC). The performance of the system is thus substantially improved. In the proposed DMPC, both model-based prediction and receding horizon optimization are utilized to guarantee the closedloop stability of the rotor-AMB suspension systems with input constraints. Finally, the effectiveness and superiority of the proposed method are examined through substantial levitation experiments on a machining platform with installed AMBs.

关键词： dual-mode predictive control system identification optimization control model predictive control suspension control

Is an accessory nipple associated with an intrapancreatic accessory spleen?

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2019年第6期18卷 596-597页

作者： hai-tao Huang Qi Ling Department of Surgery the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases the First Affiliated HospitalZhejiang University School of MedicineHangzhou 310003China

Intrapancreatic accessory spleen(IPAS)is a rare differential diagnosis of a solitary hypervascular *** is not uncommon to misdiagnose IPAS as pancreatic tumors since no specific imaging has been developed for the differential *** described a rare case of a male patient with a unilateral accessory nipple and a solitary hypervascular lesion in the *** patient underwent a distal pancreaticosplenectomy,and IPAS was finally diagnosed.

关键词： spleen diagnosis accessory