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The Numerical Study of the S = 1/2 XXZ Chain

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Communications in Theoretical Physics 2001年第10期36卷 483-486页

作者： YE Fei DING Guo-Hui xu bo-wei Department of Physics Shanghai Jiao Tong University Shanghai 200030 China Department of Physics Shanghai Jiao Tong University Shanghai 200030 China Department of Physics Shanghai Jiao Tong University Shanghai 200030 China

We adopt the Lanczos method combined with the quantum conformal field theory to investigate the S = 1/2XXZ chain in detail. The bulk-limit ground state energy, the anomalous scaling dimension of the spin operators, theFermi velocity and the zero-temperature susceptibility are numerically calculated. The results agree to the exact solution well.

关键词： quantized spin models, strongly correlated electron systems, Lanczos method

Phase Transition of Spin-Peierls Systems with Impurities

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Chinese Physics Letters 2000年第8期17卷 552-554页

作者： xu bo-wei DING Guo-Hui YE Fei Department of Physics Shanghai Jiao Tong UniversityShanghai 200030

The quasi-one-dimensional spin-Peierls(SP)systems with impurities are studied in their bosonized *** spins of the dimerized state are bounded into singlets with an SP gap,while the impurities of doped systems will induce fluctuations of the coupling strength between the spins at different sites and break some pairs of spin *** doping suppresses the dimerized SP state and induces a Kosterlitz-Thouless phase transition from the dimerized state into the undimerized one.

关键词： form. singlet dimer

Particle Swarm-Based Translation Control for Immersed Tunnel Element in the Hong Kong–Zhuhai–Macao Bridge Project

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China Ocean Engineering 2018年第1期32卷 32-40页

作者： LI Jun-jun YANG Xiao-jun XIAO Ying-jie xu bo-wei WU Hua-feng Merchant Marine College Shanghai Maritime University Institute of Logistics Science &Engineering Shanghai Maritime University

Immersed tunnel is an important part of the Hong Kong–Zhuhai–Macao Bridge(HZMB) project. In immersed tunnel floating, translation which includes straight and transverse movements is the main working mode. To decide the magnitude and direction of the towing force for each tug, a particle swarm-based translation control method is presented for non-power immersed tunnel element. A sort of linear weighted logarithmic function is exploited to avoid weak subgoals. In simulation, the particle swarm-based control method is evaluated and compared with traditional empirical method in the case of the HZMB project. Simulation results show that the presented method delivers performance improvement in terms of the enhanced surplus towing force.

关键词： immersed tunnel element translation control Hong Kong–Zhuhai–Macao Bridge(HZMB) project particle swarm optimization

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精确的量子化条件和不变量

物理学报 2006年第4期55卷 1571-1579页

作者：马中骐许伯威中国科学院高能物理研究所北京100049 上海交通大学物理系上海200030

提出并证明了一维量子系统和三维球对称量子系统的一个精确的量子化条件.在此精确量子化条件中,除了通常的Nπ项外,还有一积分项,称为修正项.发现该修正项正是在超对称量子力学中所谓的有形状不变势的量子系统的一个不变量,它不依赖于... 详细信息

提出并证明了一维量子系统和三维球对称量子系统的一个精确的量子化条件.在此精确量子化条件中,除了通常的Nπ项外,还有一积分项,称为修正项.发现该修正项正是在超对称量子力学中所谓的有形状不变势的量子系统的一个不变量,它不依赖于波函数的节点数.对这些系统,可用基态能级和波函数确定此不变量的值,从而由精确的量子化条件容易算出全部束缚态的能级.计算得到能级的正确性又反过来验证了在有形状不变势的量子系统中此修正项确实是不变量.计算的有形状不变势的量子系统,包括一维的有限方势阱、Morse势及其变形、Rosen-Morse势、两类P schl-Teller势、Eckart势、Hulthen势、一维和三维的简谐振子势和三维氢原子势.

关键词：量子化条件超对称量子力学形状不变势不变量

Thin steel plate with thumbtack fixation in the treatment of massive presacral venous plexus hemorrhage

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Chinese Medical Journal 2011年第19期124卷 3180-3181页

作者： YU Li-ping DAI Guo-fang DUAN Jian-chun xu Yong-bo CHEN wei-jun ZHOU Lin-qiu Department of General Surgery Jin Tan People＇s Hospital Affiliated to Jiangsu University Jintan Jiangsu 213200 China

Background Massive presacral venous plexus hemorrhage during radical resection of rectal carcinoma is rare, but when it occurs, bleeding can be uncontrollable, leading to death in some cases. Medical adhesive gauze sticking and packing and thumbtack compressive fixation are often used for hemostasis, but these methods are not effective in cases of uncontrollable massive hemorrhage. Therefore, identifying a practical, accurate, and reliable method of hemostasis in these cases is *** Between January 2004 and December 2009, we treated 3 patients with massive presacral venous plexus hemorrhage during resection of rectal carcinoma by placing small, trimmed thin steel plates at the bleeding sites. The plates were fixed with a saddle-type application of *** Bleeding was successfully controlled in all 3 patients, and intestinal anastomosis was carried out after hemostasis. No complications were *** Application of a small, thin steel plate to the bleeding site with thumbtack fixation is a simple and effective method of hemostasis in patients with massive presacral venous plexus hemorrhage during resection of rectal carcinoma.

关键词： thin steel plate compressive fixation massive presacral venous plexus hemorrhage

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梯形自旋链的一种规范场论的形式

物理学报 2001年第2期50卷 310-312页

作者：许伯威叶飞丁国辉上海交通大学物理系上海200030

考虑无质量费米场和规范场的Pauli相互作用项的系统 ,在这一理论中耦合常数为无量纲量 .该模型等价于自旋 1/ 2反铁磁XXZ量子链 .如在模型中引入费米场的味自由度 ,则可定性描述二条自旋链的梯形结构系统 .在这一系统中不再存在无能隙激... 详细信息

考虑无质量费米场和规范场的Pauli相互作用项的系统 ,在这一理论中耦合常数为无量纲量 .该模型等价于自旋 1/ 2反铁磁XXZ量子链 .如在模型中引入费米场的味自由度 ,则可定性描述二条自旋链的梯形结构系统 .在这一系统中不再存在无能隙激发 .

关键词：梯形结构规范场自旋链

国际药品监管科学起源、定义与特征的若干思考

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中国新药杂志 2023年第18期32卷 1816-1821页

作者：徐伟博王迎军华南理工大学国家人体组织功能重建工程技术研究中心广州510006 华南理工大学生物医学科学与工程学院广州510006

药品监管科学是近年来国际社会高度关注的药品领域的前沿课题。目前,不同国家和地区药品监管产业基础不同、发展阶段不同、面临的突出问题不同,药品监管科学关注的重点和需要破解的难题也有所不同。药品监管科学起源的观点启示,要从新... 详细信息

药品监管科学是近年来国际社会高度关注的药品领域的前沿课题。目前,不同国家和地区药品监管产业基础不同、发展阶段不同、面临的突出问题不同,药品监管科学关注的重点和需要破解的难题也有所不同。药品监管科学起源的观点启示,要从新时代的到来和新力量的产生深入思考药品监管科学的出现与发展。药品监管科学定义和特征的论点启示,要围绕聚焦药品监管规律、围绕监管突出问题、服务监管科学决策来推动和发展监管科学,开发监管新工具、新标准和新方法,培育监管新理念、新制度和新机制。

关键词：监管科学前沿科学交叉科学实用科学

Targets capture by distributed active swarms via bio-inspired reinforcement learning

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 210-221页

作者： Kun xu Yue Li Jun Sun Shuyuan Du Xinpeng Di Yuguang Yang bo Li Institute of Biomechanics and Medical Engineering Applied Mechanics Laboratory Department of Engineering MechanicsTsinghua University Institute of Nuclear and New Energy Technology Tsinghua University Shanghai Aerospace Control Technology Institute Shanghai Key Laboratory of Aerospace Intelligent Control Technology College of Automation Engineering Nanjing University of Aeronautics and Astronautics

Natural swarms arranged from cells to herds are usually decentralized but display intriguing collective intelligence in coordinating individuals across large scales to efficiently achieve their common goals. Learning from nature may provide new strategies for controlling collective dynamics of synthetic swarms to accomplish specific functions. Here, we present a bioinspired computational framework that steers distributed active swarms to collectively capture and merge targets via reinforcement learning. We exploit collective milling structures of natural herds to cage the targets, and adopt a switching control policy inspired by sperms' chiral dynamics to optimize the trajectories of individuals, through which the active swarms can selforganize to enclose single or multiple distant targets in a dynamical, adaptive and scalable manner. There exists a critical swarm size, beyond which the excessive competition between agents would generate large mechanical forces, leading to capture instability but enabling the transition from short-distance to long-distance merging capture of multiple targets. This work provides physical insights into distributed active swarms and could offer a multilevel, decentralized strategy toward controlling swarm robotics in wide applications such as bio-medical devices, machine immunity, and target clearance.

关键词： swarm intelligence robotics multi-tasks artificial intelligence bionics

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西昆仑阿什库勒大黑山火山岩浆作用过程研究

岩石学报 2017年第1期33卷 56-68页

作者：于红梅赵波许建东魏费翔中国地震局地质研究所活动构造与火山重点实验室北京100029

西昆仑阿什库勒火山群位于青藏高原西北缘,由于环境恶劣,研究程度低。大黑山火山为该区内熔岩分布面积最广、喷发规模最大的一座火山。本次对大黑山火山岩的显微结构、斑晶类型和化学成分进行了详细的测试分析,讨论其反映的岩浆过程。... 详细信息

西昆仑阿什库勒火山群位于青藏高原西北缘,由于环境恶劣,研究程度低。大黑山火山为该区内熔岩分布面积最广、喷发规模最大的一座火山。本次对大黑山火山岩的显微结构、斑晶类型和化学成分进行了详细的测试分析,讨论其反映的岩浆过程。大黑山火山成分具有一个较大的范围,包括玄武粗安岩、粗安岩和粗面岩,主要氧化物与Si O2含量之间呈线性关系,说明三种类型岩浆存在岩浆演化关系。熔岩主要斑晶为辉石和斜长石,大量斑晶显示熔蚀、反环带和反应边结构,指示岩浆混合特征。温压计计算得到玄武粗安岩和粗安岩平衡温度在1124~1176℃之间,平衡压力在0.55~0.81GPa之间,对应的深度约16.5~24.3km,粗面岩的平衡温度1059~1071℃,平衡压力0.39~0.59GPa,对应深度11.8~17.7km。研究显示,大黑山火山下的主岩浆经历了玄武粗安岩、粗安岩和粗面岩的演化,三种岩浆可能以分层的形式同时存在于岩浆房中,三种岩浆存在着混合作用,并与周围偏酸性岩浆发生了混合作用。

关键词：显微结构化学成分岩浆混合大黑山火山阿什库勒火山群