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Fermion Determinant with Dynamical Chiral Symmetry Breaking

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Communications in Theoretical Physics 2002年第8期38卷 185-188页

作者： lu qin YANG Hua WANG qing Department of Physics Tsinghua University Beijing 100084 China Department of Physics Tsinghua University Beijing 100084 China Institute of Electronic Technology Information Engineering University Zhengzhou 450004 China Department of Physics Tsinghua University Beijing 100084 China Institute of Theoretical Physics Academia Sinica Beijing 100080 China

One-loop fermion determinant is discussed for the case in which the dynamical chiral symmetry breakingcaused by momentum-dependent fermion self-energy ∑(p2) takes place. The obtained series generalizes the heat kerne... 详细信息

关键词： determinant, dynamical symmetry breaking, heat kernel

Gauge Covariance and Momentum Space Asymptotically Non-logarithmic Total Derivatives

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Communications in Theoretical Physics 2008年第2期49卷 431-434页

作者： lu qin ZHANG Ying WANG qing Department of Physics Tsinghua University Beijing 100084 China

We focus on a new gauge symmetry keeping regularization scheme for momentum integration and point out that dropping out momentum space asymptotic non-logarithmic total derivative divergent integrations in quantum fiel... 详细信息

关键词： gauge covariance momentum integration total derivative

The P450-type carotene hydroxylase PuCHY1 from Porphyra suggests the evolution of carotenoid metabolism in red algae

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Journal of Integrative Plant Biology 2014年第9期56卷 902-915页

作者： Li-En Yang Xing-Qi Huang Yu Hang Yin-Yin Deng qin-qin lu Shan lu State Key Laboratory of Pharmaceutical Biotechnology School of Life SciencesNanjing University Department of Biology and Food Engineering Changshu Institute of Technology Institute of Fisheries of Jiangsu Province

Carotene hydroxylases catalyze the hydroxylation of a- and β-carotene hydrocarbons into *** red algae,β-carotene is a ubiquitously distributed carotenoid,and hydroxylated carotenoids such as zeaxanthin and lutein are also ***,no enzyme with carotene hydroxylase activity had been previously identified in red ***,we report the isolation of a gene encoding a cytochrome P450-type carotene hydroxylase（PuCHY1） from Porphyra umbilicalis,a red alga with an ancient *** comparisons found PuCHY1 belongs to the CYP97 B subfamily,which has members from different photosynthetic organisms ranging from red algae to land *** complementation in Escherichia coli suggested that PuCHY1 catalyzed the conversion from β-carotene to *** we overexpressed PuCHYi in the Arabidopsis thaliana chy2 mutant,pigment analysis showed a significant accumulation of hydroxylated carotenoids,including neoxanthin,violaxanthin,and lutein in the leaves of transgenic *** results confirmed a β-hydroxylation activity of PuCHY1,and also suggested a possible ε-hydroxylation *** pigment profile and gene expression analyses of the algal thallus under high-light stress suggested that *** is unlikely to operate a partial xanthophyll cycle for photoprotection.

关键词： Bangiales carotene hydroxylase carotenoid metabolism CYP97B cytochrome P450 Porphyra umbilicalis red algae

Impact of counter-rotating-wave term on quantum heat transfer and phonon statistics in nonequilibrium qubit–phonon hybrid system

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Chinese Physics B 2021年第3期30卷 17-24页

作者： Chen Wang lu-qin Wang Jie Ren Department of Physics Zhejiang Normal UniversityJinhua 321004China Center for Phononics and Thermal Energy Science China-EU Joint Center for NanophononicsShanghai Key Laboratory of Special Artificial Microstructure Materials and TechnologySchool of Physics Science and EngineeringTongji UniversityShanghai 200092China

Counter-rotating-wave terms(CRWTs)are traditionally viewed to be crucial in open small quantum systems with strong system–bath *** by exemplifying in a nonequilibrium qubit–phonon hybrid model,we show that CRWTs can play the significant role in quantum heat transfer even with weak system–bath *** using extended coherent phonon states,we obtain the quantum master equation with heat exchange rates contributed by rotating-waveterms(RWTs)and CRWTs,*** find that including only RWTs,the steady state heat current and current fluctuations will be significantly suppressed at large temperature bias,whereas they are strongly enhanced by considering CRWTs in ***,for the phonon statistics,the average phonon number and two-phonon correlation are nearly insensitive to strong qubit–phonon hybridization with only RWTs,whereas they will be dramatically cooled down via the cooperative transitions based on CRWTs in ***,CRWTs in quantum heat transfer system should be treated carefully.

关键词： quantum transport open systems nonequilibrium and irreversible thermodynamics phonons or vibrational states in low-dimensional structures and nanoscale materials

Managing Quantum Heat Transfer in a Nonequilibrium Qubit-Phonon Hybrid System with Coherent Phonon States

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Chinese Physics Letters 2021年第1期38卷 10-18页

作者： Chen Wang lu-qin Wang Jie Ren Department of Physics Zhejiang Normal UniversityJinhua 321004China Center for Phononics and Thermal Energy Science China-EU Joint Center for NanophononicsShanghai Key Laboratory of Special Artificial Microstructure Materials and TechnologySchool of Physics Sciences and EngineeringTongji UniversityShanghai 200092China

We investigate quantum heat transfer in a nonequilibrium qubit-phonon hybrid open system,dissipated by external bosonic thermal *** applying coherent phonon states embedded in the dressed quantum master equation,we are capable of dealing with arbitrary qubit-phonon coupling *** is counterintuitively found that the effect of negative differential thermal conductance is absent at strong qubit-phonon hybridization,but becomes profound at weak qubit-phonon coupling *** underlying mechanism of decreasing heat flux by increasing the temperature bias relies on the unidirectional transitions from the up-spin displaced coherent phonon states to the down-spin counterparts,which seriously freezes the qubit and prevents the system from completing a thermodynamic ***,the effects of perfect thermal rectification and giant heat amplification are unraveled,thanks to the effect of negative differential thermal *** results of the nonequilibrium qubit-phonon open system would have potential implications in smart energy control and functional design of phononic hybrid quantum devices.

关键词： phonon quantum coherent

PBL联合情景模拟演练教学模式在安宁疗护从业人员培训中的应用

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卫生职业教育 2025年第1期43卷 146-149页

作者：张慧荣李莹路琴北京老年医院北京100095

目的研究PBL(问题驱动教学模式)联合情景模拟演练教学模式在安宁疗护从业人员培训中的效果。方法选择2019年5月至2023年11月在我院参加安宁疗护培训的从业人员,采取目的分组法将其分为干预组和对照组,每组各28名,对照组采用LBL(以讲授... 详细信息

目的研究PBL(问题驱动教学模式)联合情景模拟演练教学模式在安宁疗护从业人员培训中的效果。方法选择2019年5月至2023年11月在我院参加安宁疗护培训的从业人员,采取目的分组法将其分为干预组和对照组,每组各28名,对照组采用LBL(以讲授为基础)教学模式,干预组采用LBL+PBL+情景模拟演练教学模式,比较两组的理论及实践操作考试成绩并评价教学效果。结果培训后,两组人员理论及实践操作考试成绩均有提高,且干预组考试成绩明显高于对照组(P<0.05)。两组培训满意度调查表得分对比差异有统计学意义(P<0.05),干预组培训满意度调查表得分明显高于对照组。结论将PBL联合情景模拟演练教学模式运用到安宁疗护从业人员培训中,可提升培训人员的操作能力和满意度,值得推广。

关键词： PBL 情景模拟演练教学模式安宁疗护

Mesenchymal stem cell-derived exosomes:An emerging therapeutic strategy for normal and chronic wound healing

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World Journal of Clinical Cases 2021年第22期9卷 6218-6233页

作者： qin-lu Zeng De-Wu Liu Burns Institute The First Affiliated Hospital of Nanchang UniversityNanchang 330006Jiangxi ProvinceChina First Clinical Medical College Nanchang UniversityNanchang 330006Jiangxi ProvinceChina

Skin wound healing is a complex biological *** stem cells(MSCs)play an important role in skin wound repair due to their multidirectional differentiation potential,hematopoietic support,promotion of stem cell implantation,self-replication,and immune *** are vesicles with diameters of 40-100 nm that contain nucleic acids,proteins,and lipids and often act as mediators of cell-to-cell ***,many clinical scientists have carried out cell-free therapy for skin wounds,especially chronic wounds,using exosomes derived from *** review focuses on the latest research progress on the mechanisms of action associated with the treatment of wound healing with exosomes derived from different MSCs,the latest research progress on the combination of exosomes and other biological or nonbiological factors for the treatment of chronic skin wounds,and the new prospects and development goals of cell-free therapy.

关键词： Mesenchymal stem cells Exosomes Mesenchymal stem cell-exosomes Wound healing Therapeutics

An Ensemble Approach for Emotion Cause Detection with Event Extraction and Multi-Kernel SVMs

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Tsinghua Science and Technology 2017年第6期22卷 646-659页

作者： Ruifeng Xu Jiannan Hu qin lu Dongyin Wu Lin Gui School of Computer Science and Technology Harbin Institute of Technology Shenzhen Graduate School Department of Computing the Hong Kong Polytechnic University

In this paper, we present a new challenging task for emotion analysis, namely emotion cause *** this task, we focus on the detection of emotion cause a.k.a the reason or the stimulant of an emotion, rather than the regular emotion classification or emotion component extraction. Since there is no open dataset for this task available, we first designed and annotated an emotion cause dataset which follows the scheme of W3 C Emotion Markup Language. We then present an emotion cause detection method by using event extraction framework,where a tree structure-based representation method is used to represent the events. Since the distribution of events is imbalanced in the training data, we propose an under-sampling-based bagging algorithm to solve this problem. Even with a limited training set, the proposed approach may still extract sufficient features for analysis by a bagging of multi-kernel based SVMs method. Evaluations show that our approach achieves an F-measure 7.04%higher than the state-of-the-art methods.

关键词： emotion cause detection event extraction multi-kernel SVMs bagging

Incorporating multi-kernel function and Internet verification for Chinese person name disambiguation

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Frontiers of Computer Science 2016年第6期10卷 1026-1038页

作者： Ruifeng XU Lin GUI qin lu Shuai WANG Jian XU Shenzhen Engineering Laboratory of Performance Robots at Digital Stage Harbin Institute of Technology Shenzhen Graduate School Shenzhen 518055 China Department of Computing The Hong Kong Polytechnic University Hong Kong China

The study on person name disambiguation aims to identify different entities with the same person name through document linking to different entities. The traditional disambiguation approach makes use of words in documents as features to distinguish different entities. Due to the lack of use of word order as a feature and the limited use of external knowledge, the traditional approach has performance limitations. This paper presents an approach for named entity disambiguation through entity linking based on a multi- kernel function and Internet verification to improve Chinese person name disambiguation. The proposed approach extends a linear kernel that uses in-document word features by adding a string kernel to construct a multi-kernel function. This multi-kernel can then calculate the similarities between an input document and the entity descriptions in a named per- son knowledge base to form a ranked list of candidates to different entities. Furthermore, Internet search results based on keywords extracted from the input document and entity descriptions in the knowledge base are used to train classifiers for verification. The evaluations on CIPS-SIGHAN 2012 person name disambiguation bakeoff dataset show that the use of word orders and Internet knowledge through a multi-kernel function can improve both precision and recall and our system has achieved state-of-the-art performance.

关键词： Chinese person name disambiguation Internet verification string kemel multi-kemel function machine learning