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通过Raman相互作用制备三个腔场的W型纠缠相干态(英文)

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光子学报 2007年第5期36卷 950-954页

作者：陈美锋马宋设福州大学电子科学与应用物理系福州350002

通过对比分立变量量子信息过程和连续变量量子信息过程的差别,利用相干态比较容易获得的这个特点,提出一种方案制备三个腔场的W型纠缠相干态.方案基于Λ型三能级原子与单模腔场的简并Raman相互作用.三个相同的腔初始分别处于相干态,三... 详细信息

通过对比分立变量量子信息过程和连续变量量子信息过程的差别,利用相干态比较容易获得的这个特点,提出一种方案制备三个腔场的W型纠缠相干态.方案基于Λ型三能级原子与单模腔场的简并Raman相互作用.三个相同的腔初始分别处于相干态,三个相同的原子初始处于W型纠缠态,通过三个原子分别与三个腔的Raman相互作用、选择适当的相互作用时间并探测作用后的三个原子,三个腔场坍缩为W型纠缠相干态.在原子与腔的相互作用过程中原子不处于高能级,可以忽略原子的自发辐射,系统的相干性能够得到较好的维持.基于当前的腔量子电动力学技术,相信方案能在实验上实现.该方案制备的三个腔场W型纠缠相干态有望在连续变量量子信息过程中有重要的应用价值.文中将方案推广到制备n(n〉3)个腔场的W型纠缠相干态.

关键词： A型三能级原子相干态 Raman相互作用 W型纠缠相干态

通过Raman相互作用隐形传送未知多原子纠缠态(英文)

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光子学报 2007年第6期36卷 1152-1155页

作者：陈美锋马宋设福州大学电子科学与应用物理系福州350002

基于多粒子纠缠态在证明量子非定域性和量子信息处理方面的重要应用,提出一种方案隐形传送未知原子纠缠态.方案基于Λ型三能级原子与单模腔场的简并Raman相互作用.首先让n个原子相继通过一个相干腔场来制备量子通道.然后发送者让携带未... 详细信息

基于多粒子纠缠态在证明量子非定域性和量子信息处理方面的重要应用,提出一种方案隐形传送未知原子纠缠态.方案基于Λ型三能级原子与单模腔场的简并Raman相互作用.首先让n个原子相继通过一个相干腔场来制备量子通道.然后发送者让携带未知纠缠态的另n个原子相继通过相干腔场并通过对原子与腔场的探测作联合测量.当|α| 1时,可以用探测正交态的方法探测腔场.最后接收者根据由经典通道得到的联合测量结果重构初始态.方案的特点是用一个相干态与多个原子的纠缠态作为量子通道,简单易行.该方案有望在证明量子非定域性和量子信息过程中有重要的应用价值.

关键词：量子信息纠缠态隐形传送 Raman相互作用

Modeling and control of a rigid-flexible coupling robot for narrow space manipulations

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Science China Technological Sciences 2025年

作者： Kuangda chen Huan ZHAO Jiexin ZHANG mei feng Yiwei WANG Jinliang WANG Han DING State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and Technology Key Laboratory of CNC Equipment Reliability Ministry of Education Jilin University School of Medical Equipment Science and Engineering Huazhong University of Science and Technology

Narrow space manipulations are crucial for equipment maintenance, as they eliminate the need for disassembly, thus reducing costs and increasing efficiency. Cable-driven flexible robots possess exceptional capabilities in maneuvering through narrow spaces, thanks to their interaction compliance and distal dexterity. However, their inherent low stiffness causes a decline in the location accuracy of the robot and could even lead to manipulation failure. To address this challenge, this paper proposes a novel type of rigid-flexible coupling robot, which increases the stiffness of the robot while ensuring the reachability within a narrow space. To achieve high-accuracy location in a narrow space, kinematic and control methods are proposed. Specifically,the robot forward kinematics are uniformly represented, and the closed-form inverse kinematics solution is derived. Furthermore, in cases where the robot?s structure fails to align with Pieper?s solution, a two-stage search strategy is utilized to solve the inverse kinematics, resulting in a high success rate of 99.1%. Based on the proposed kinematics, a rigid-dominated control method is then proposed to facilitate localization and pose alignment of target objects in narrow spaces. The practical comparative experiments show that the proposed robot has the capability of high accuracy control in narrow spaces.

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驱动单个原子制备纠缠相干态

福州大学学报（自然科学版） 2006年第4期34卷 509-511页

作者：陈美锋福州大学物理与信息工程学院福建福州350002

提出一种利用经典场驱动单个原子与一个多模腔场相互作用制备腔场的多模纠缠相干态的方案.交替调整原子的跃迁频率,使原子与经典场及多模腔场交替作用,通过对原子的选态测量使多模腔场塌缩为多模纠缠相干态.

关键词：腔量子电动力学纠缠相干态驱动 Jaynes-Cummings模型

复合微生态制剂对全株玉米青贮发酵品质及营养成分的影响

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饲料研究 2021年第15期44卷 92-95页

作者：陈凤梅山东畜牧兽医职业学院山东淮坊261061

试验研究复合微生态制剂对全株玉米青贮品质及营养成分的影响。试验分为不添加复合微生态制剂的对照组、添加全株玉米鲜重0.05%和0.10%复合微生态制剂组。在发酵后的第3、6、9、12个月取样。结果显示,复合微生态制剂能够显著降低全株玉... 详细信息

试验研究复合微生态制剂对全株玉米青贮品质及营养成分的影响。试验分为不添加复合微生态制剂的对照组、添加全株玉米鲜重0.05%和0.10%复合微生态制剂组。在发酵后的第3、6、9、12个月取样。结果显示,复合微生态制剂能够显著降低全株玉米青贮pH值和氨态氮含量(P<0.05),0.10%复合微生态制剂能够显著增加乳酸含量(P<0.05);全株玉米青贮6个月后,添加复合微生态制剂组的乙酸、丙酸和丁酸含量显著高于对照组(P<0.05),且随青贮时间的延长而升高;青贮6个月与12个月时,添加复合微生态制剂组粗蛋白含量显著高于对照组(P<0.05);复合微生态制剂组可溶性碳水化合物含量显著高于对照组(P<0.05);全株玉米青贮12个月后,0.10%复合微生态制剂组中性洗涤纤维含量显著低于对照组(P<0.05)。研究表明,复合微生态制剂能够改善全株玉米青贮的发酵品质,提高饲料营养价值,其添加量以0.10%效果最佳。

关键词：全株玉米青贮复合微生态制剂发酵品质营养价值

CBERS-02B卫星影像特征分析及几何校正方法比较

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福建师范大学学报（自然科学版） 2011年第4期27卷 61-64页

作者：陈美凤福建师范大学地理科学学院福建福州350108

对02B卫星影像数据质量及校正方法进行了研究与分析,影像特征分析采用统计特征参数法,并与分辨率相近的ALOS和SPOT5影像进行比较.影像几何校正采用了基于自动匹配法的小样条、RPC及多项式模型3种方法进行校正实验,对它们精度成果进行比... 详细信息

对02B卫星影像数据质量及校正方法进行了研究与分析,影像特征分析采用统计特征参数法,并与分辨率相近的ALOS和SPOT5影像进行比较.影像几何校正采用了基于自动匹配法的小样条、RPC及多项式模型3种方法进行校正实验,对它们精度成果进行比较分析.该研究可为02B影像的实际应用提供参考依据.

关键词： 02B 影像特征分析影像校正自动匹配 TPS ALOS SPOT5

Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： mei Zhang Wenhao Li Yangfei chen Yang Jiang Xiaofei Guo Han Dong School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that Lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-Le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation

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国内外区域创新系统的发展模式研究

研究与发展管理 2007年第5期19卷 45-52页

作者：任胜钢陈凤梅中南大学商学院长沙410083

在经济全球化和新技术革命背景下,科技创新已成为区域经济增长的重要引擎,一些地区已形成了以创新为推动力的区域创新系统.基于大量文献的梳理,从创新主体的地位及其彼此间相互联系的空间层面对国内外区域创新系统的发展模式进行分类,... 详细信息

在经济全球化和新技术革命背景下,科技创新已成为区域经济增长的重要引擎,一些地区已形成了以创新为推动力的区域创新系统.基于大量文献的梳理,从创新主体的地位及其彼此间相互联系的空间层面对国内外区域创新系统的发展模式进行分类,以期对我国培育和发展有地方特色的区域创新系统提供借鉴.

关键词：区域创新系统发展模式创新

MixerKT:A Knowledge Tracing Model Based on Pure MLP Architecture

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Computers, Materials & Continua 2025年第1期82卷 485-498页

作者： Jun Wang Mingjie Wang Zijie Li Ken chen Jiatian mei Shu Zhang Key Laboratory of Education Informatization for Nationalities Ministry of EducationYunnan Normal UniversityKunming650000China Yunnan Key Laboratory of Smart Education Yunnan Normal UniversityKunming650000China

In the field of intelligent education,the integration of artificial intelligence,especially deep learning technologies,has garnered significant *** tracing(KT)plays a pivotal role in this field by predicting students’future performance through the analysis of historical interaction data,thereby assisting educators in evaluating knowledgemastery and tailoring instructional *** knowledge tracingmethods,largely based on Recurrent Neural Networks(RNNs)and Transformer models,primarily focus on capturing long-term interaction patterns in sequential ***,these models may neglect crucial short-term dynamics and other relevant *** paper introduces a novel approach to knowledge tracing by leveraging a pure Multilayer Perceptron(MLP)*** proposeMixerKT,a knowledge tracing model based on theHyperMixer framework,which uniquely integrates global and localMixer feature *** architecture enables more effective extraction of both long-terminteraction trends and recent learning behaviors,addressing limitations in currentmodels thatmay overlook these key *** evaluations on twowidely-used datasets,ASSIS Tments2009 and Algebra2005,demonstrate that MixerKT consistently outperforms several state-of-the-art models,including DKT,SAKT,and Separated Self-Attentive Neural Knowledge Tracing(SAINT).Specifically,MixerKT achieves higher prediction accuracy,highlighting its effectiveness in capturing the nuances of learners’knowledge *** results indicate that our model provides a more comprehensive representation of student learning patterns,enhancing the ability to predict future performance with greater precision.

关键词： Knowledge tracing multilayer perceptron channel mixer sequence mixer