检索结果-南通市图书馆

A New Kind of Bipartite Entangled State Representation and its Application

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2009年第2期51卷 209-214页

作者： xu shi-min xu Xing-Lei LI Hong-Qi WANG Ji-Suo Department of Physics Heze University Heze 274015 China Key Laboratory of Quantum Communication and Calculation Heze University Heze 274015 China School of Physical Science and Information Engineering Liaocheng University Liaocheng 252059 China

We construct four linear composite operators for a two-particle system and give common eigenvectors of those operators. The technique of integration within an ordered product of operators is employed to prove that those common eigenvectors are complete and orthonormal. Therefore, a new intermediate coordinate-momentum representation for a two-particle system is proposed and applied to some two-body dynamic problems.

关键词： two-particle system intermediate coordinate-momentum representation IWOP technique

Theoretical and Experimental Study on Plug Shape Parameter of Press Piercing Mill

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2003年第4期10卷 33-37页

作者： SUN Deng-yue DU Feng-shan xu shi-min Yanshan University

The characteristics of some elements in inoculant were analyzed. The effect of the morphology of instantaneous inoculant on its melting velocity was studied. When the inoculants pass through the same sieve number, the volume and the ratio of surface area to volume are different. It is evident from the theoretical analysis and experiment under some conditions that the melting velocity of inoculant depends on the morphology of inoculant. The morphology of inoculant during production should be controlled carefully.

关键词： instantaneous inoculant morphology melting velocity melted iron

Dynamic Strip Thickness Simulation on Five-Stand Cold Continuous Rolling Mill

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2006年第2期13卷 30-32页

作者： SUN Deng-yue DU Feng-shan xu shi-min ZHU Guang-ming ZHOU Jian-gang College of Mechanical Engineering Yanshan University Qinhuangdao 066004 Hebei China Baosteel Technology Center Shanghai 201900 China

Based on a rolling model, the simulation of strip thickness during cold continuous rolling was made on the platform software Matrix. The simulation system combined the discrete system with continuous system for high speed and dynamics. Simulation parameters were calculated by differential element method, and the simulation results fit in with practical data very well.

关键词： cold continuous rolling thickness simulation

在线全文

学校读者我要写书评

暂无评论

基于源数估计的盲源分离

系统仿真学报 2006年第2期18卷 485-488页

作者：李广彪许士敏解放军电子工程学院安徽合肥230037

在信号源少于传感器观测到的混合信号时,未知信号源数目的估计一直是已有盲分离算法中一个未解决的问题。就盲分离在阵列信号处理中的应用,提出了一种基于四阶累积量的源数估计方法。由于四阶累积量对高斯噪声的抑制作用,从而可提高估... 详细信息

在信号源少于传感器观测到的混合信号时,未知信号源数目的估计一直是已有盲分离算法中一个未解决的问题。就盲分离在阵列信号处理中的应用,提出了一种基于四阶累积量的源数估计方法。由于四阶累积量对高斯噪声的抑制作用,从而可提高估计的分辨性能。给出了详细的计算方法,并用蒙特卡洛试验证实了该方法优于通常的源数估计算法。将其用于盲源分离,通过实例证明了该方法的正确性和有效性,从而解决了盲分离中信号源个数的估计问题,为盲源分离技术的应用进一步奠定了基础。

关键词：盲源分离四阶累积量阵列信号处理源数估计

三模坐标-动量耦合量子谐振子哈密顿量对角化的新方法

在线全文

学校读者我要写书评

暂无评论

大学物理 2008年第3期27卷 11-13页

作者：徐世民菏泽学院物理系山东菏泽274015

利用二次型理论构造一个幺正矩阵进行表象变换,将|x〉表象中的三模坐标-动量耦合量子谐振子体系的哈密顿量对角化,这不仅提供了一种解决该类问题的一般数学方法,同时对培养和提升学生运用数学工具解决复杂物理问题的能力也具有积极的指... 详细信息

利用二次型理论构造一个幺正矩阵进行表象变换,将|x〉表象中的三模坐标-动量耦合量子谐振子体系的哈密顿量对角化,这不仅提供了一种解决该类问题的一般数学方法,同时对培养和提升学生运用数学工具解决复杂物理问题的能力也具有积极的指导作用.

关键词：二次型三模坐标-动量耦合量子谐振子幺正矩阵对角化

在线全文

学校读者我要写书评

暂无评论

两粒子相容可观察量共同本征矢的推导

大学物理 2008年第11期27卷 8-10页

作者：徐世民菏泽学院物理系山东菏泽274015

利用有序算符正规乘积内的积分技术(IWOP)和待定系数法,推导出了两粒子相对坐标算符x^1-x^2与总动量算符p^1+p^2的共同本征矢|η〉在Fock空间中的展开式,为解决这类问题提供了一种行之有效的方法,这对提高学生的学习素质和加深学生对理... 详细信息

利用有序算符正规乘积内的积分技术(IWOP)和待定系数法,推导出了两粒子相对坐标算符x^1-x^2与总动量算符p^1+p^2的共同本征矢|η〉在Fock空间中的展开式,为解决这类问题提供了一种行之有效的方法,这对提高学生的学习素质和加深学生对理论知识的理解会有一定的帮助.

关键词： Fock空间 IWOP技术本征矢

在线全文

学校读者我要写书评

暂无评论

滚珠轴承故障振动信号的自动识别

上海交通大学学报 1989年第3期23卷 75-81页

作者：徐子奇徐敏史习智上海交通大学振动冲击噪声研究所

本文讨论了信号统计模式识别的某些特征提取和分类方法,还提出了一种新的故障特征提取方法——FFT-AR 特征提取法,并研究了这些方法在滚珠轴承在线检测和计算机自动诊断中的应用.

关键词：滚珠轴承振动故障检测信号识别

在线全文

学校读者我要写书评

暂无评论

盲源分离技术在通信侦察系统中的应用

系统工程与电子技术 2006年第11期28卷 1672-1674页

作者：刘小秋薛磊许士敏解放军电子工程学院安徽合肥230037

针对如何快速、准确地对无线电通信信号进行截获、分离和识别是现代通信侦察的瓶颈,盲源分离对于解决这些难题具有独特的优势。给出了基于盲源分离的无线电通信侦察系统模型,从DoA估计和调制样式识别两方面讨论了盲源分离技术在该领域... 详细信息

针对如何快速、准确地对无线电通信信号进行截获、分离和识别是现代通信侦察的瓶颈,盲源分离对于解决这些难题具有独特的优势。给出了基于盲源分离的无线电通信侦察系统模型,从DoA估计和调制样式识别两方面讨论了盲源分离技术在该领域的应用情况。通过具体的仿真实验,证明了盲源分离应用于通信侦察的正确性和可行性。

关键词：盲源分离无线电侦察 DoA估计调制识别

The pivotal role of microglia in injury and the prognosis of subarachnoid hemorrhage

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第7期20卷 1829-1848页

作者： Wenjing Ning shi Lv Qian Wang Yuzhen xu Department of Rehabilitation The Second Affiliated Hospital of Shandong First Medical UniversityTaianShandong ProvinceChina Department of Central Laboratory The Affiliated Taian City Central Hospital of Qingdao UniversityTaianShandong ProvinceChina

Subarachnoid hemorrhage leads to a series of pathological changes,including vascular spasm,cellular apoptosis,blood–brain barrier damage,cerebral edema,and white matter ***,which are the key immune cells in the central nervous system,maintain homeostasis in the neural environment,support neurons,mediate apoptosis,participate in immune regulation,and have neuroprotective *** evidence has shown that microglia play a pivotal role in the pathogenesis of subarachnoid hemorrhage and affect the process of injury and the prognosis of subarachnoid ***,microglia play certain neuroprotective roles in the recovery phase of subarachnoid *** approaches aimed at modulating microglia function are believed to attenuate subarachnoid hemorrhage *** provides new targets and ideas for the treatment of subarachnoid ***,an in-depth and comprehensive summary of the role of microglia after subarachnoid hemorrhage is still *** review describes the activation of microglia after subarachnoid hemorrhage and their roles in the pathological processes of vasospasm,neuroinflammation,neuronal apoptosis,blood–brain barrier disruption,cerebral edema,and cerebral white matter *** also discusses the neuroprotective roles of microglia during recovery from subarachnoid hemorrhage and therapeutic advances aimed at modulating microglial function after subarachnoid ***,microglia in subarachnoid hemorrhage are targeted with TLR inhibitors,nuclear factor-κB and STAT3 pathway inhibitors,glycine/tyrosine kinases,NLRP3 signaling pathway inhibitors,Gasdermin D inhibitors,vincristine receptorαreceptor agonists,ferroptosis inhibitors,genetic modification techniques,stem cell therapies,and traditional Chinese ***,most of these are still being evaluated at the laboratory *** clinical studies and data on subarachnoid hemorrhage are required to improve the treatment of subarachnoid hemor

关键词： apoptosis blood–brain barrier brain edema microglia neuroinflammation neuron neuroprotection subarachnoid hemorrhage vasoconstriction white matter injury