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Spontaneous chiral-symmetry breaking of lattice QCD with massless dynamical quarks

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science china(Physics,Mechanics & Astronomy) 2007年第1期50卷 6-14页

作者： LUO XiangQian Department of Physics,school of Physics and Engineering,sun yat-sen university,guangzhou 5102.5,china 1. Department of Physics School of Physics and Engineering Sun Yat-Sen University Guangzhou 510275 China

One of the most challenging issues in QCD is the investigation of spontaneous chiral-symmetry breaking, which is characterized by the non-vanishing chiral condensate when the bare fermion mass is zero. In standard methods of the lattice gauge theory, one has to perform expensive simulations at multiple bare quark masses, and employ some modeled functions to extrapolate the data to the chiral limit. This paper applies the probability distribution function method to computing the chiral condensate in lattice QCD with massless dynamical quarks, without any ambiguous mass extrapolation. The results for staggered quarks indicate that this might be a promising and efficient method for investigating the spontaneous chiral-symmetry breaking in lattice QCD, which deserves further investigation.

关键词： lattice QCD spontaneous chiral-symmetry breaking dynamical quarks

Twisted Ate pairing on hyperelliptic curves and applications

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science china(Information sciences) 2010年第8期53卷 1528-1538页

作者： ZHANG FangGuo 1,2 1 school of Information science and Technology, sun yat-sen university, guangzhou 5102.5, china 2 Guangdong Key Laboratory of Information Security Technology, guangzhou 5102.5, china 1. school of Information science and Technology Sun Yat-Sen University Guangzhou 510275 China2. Guangdong Key Laboratory of Information Security Technology Guangzhou 510275 China

In this paper we show that the twisted Ate pairing on elliptic curves can be generalized to hyperelliptic curves, and give a series of variations of the hyperelliptic Ate and twisted Ate pairings. Using the hyperelliptic Ate pairing and twisted Ate pairing, we propose a new approach to speeding up the Weil pairing computation. For some hyperelliptic curves with high degree twist, computing Weil pairing by our approach may be faster than Tate pairing, Ate pairing, and all other known pairings.

关键词： Ate pairing Weil pairing hyperelliptic curves pairing-based cryptosystems twisted curves

Astrocytic endothelin-1 overexpression impairs learning and memory ability in ischemic stroke via altered hippocampal neurogenesis and lipid metabolism

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Neural Regeneration Research 2024年第3期19卷 650-656页

作者： Jie Li Wen Jiang Yuefang Cai Zhenqiu Ning Yingying Zhou Chengyi Wang Sookja Ki Chung Yan Huang Jingbo sun Minzhen Deng lihua Zhou Xiao Cheng guangzhou university of Traditional Chinese Medicine GuangzhouGuangdong ProvinceChina State Key Laboratory of Dampness Syndrome of Chinese Medicine The Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhouGuangdong ProvinceChina Guangdong Provincial Key Laboratory of Research on Emergency in TCM GuangzhouGuangdong ProvinceChina Department of Anesthesiology West China HospitalSichuan UniversityChengduSichuan ProvinceChina Department of Anatomy Sun Yat-Sen School of MedicineSun Yat-Sen UniversityShenzhenGuangdong ProvinceChina Faculty of Medicine Macao University of Science and TechnologyMacao Special Administration RegionChina

Vascular etiology is the second most prevalent cause of cognitive impairment ***-1,which is produced and secreted by endothelial cells and astrocytes,is implicated in the pathogenesis of ***,the way in which changes in astrocytic endothelin-1 lead to poststroke cognitive deficits following transient middle cerebral artery occlusion is not well ***,using mice in which astrocytic endothelin-1 was overexpressed,we found that the selective overexpression of endothelin-1 by astrocytic cells led to ischemic stroke-related dementia(1 hour of ischemia;7 days,28 days,or 3 months of reperfusion).We also revealed that astrocytic endothelin-1 overexpression contributed to the role of neural stem cell proliferation but impaired neurogenesis in the dentate gyrus of the hippocampus after middle cerebral artery *** proteome profiles and western blot analysis confirmed that levels of glial fibrillary acidic protein and peroxiredoxin 6,which were differentially expressed in the brain,were significantly increased in mice with astrocytic endothelin-1 overexpression in comparison with wild-type mice 28 days after ischemic ***,the levels of the enriched differentially expressed proteins were closely related to lipid metabolism,as indicated by Kyoto Encyclopedia of Genes and Genomes pathway *** chromatography-mass spectrometry nontargeted metabolite profiling of brain tissues showed that astrocytic endothelin-1 overexpression altered lipid metabolism products such as glycerol phosphatidylcholine,sphingomyelin,and phosphatidic ***,this study demonstrates that astrocytic endothelin-1 overexpression can impair hippocampal neurogenesis and that it is correlated with lipid metabolism in poststroke cognitive dysfunction.

关键词： astrocytic endothelin-1 dentate gyrus differentially expressed proteins hippocampus ischemic stroke learning and memory deficits lipid metabolism neural stem cells neurogenesis proliferation

Fast Fourier-Galerkin methods for first-kind logarithmic-kernel integral equations on open arcs

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science china mathematics 2010年第1期53卷 1-22页

作者： WANG Bo1,WANG Rui2 & XU YueSheng3,4,1Academy of mathematics and Systems science,Chinese Academy of sciences,Beijing 100190,china 2school of Information science and Engineering,Graduate university of the Chinese Academy of sciences,Beijing 100190,china 3Department of mathematics,Syracuse university,Syracuse,NY 13244,USA 4Department of Scientific computing and Computer Applications,sun yat-sen university,guangzhou 5102.5,china 1. Academy of mathematics and Systems science Chinese Academy of Sciences Beijing 100190 China2. School of Information Science and Engineering Graduate University of the Chinese Academy of Sciences Beijing 100190 China3. Department of Mathematics Syracuse University Syracuse NY 13244 USA4. Department of Scientific Computing and Computer Applications Sun Yat-sen University Guangzhou 510275 China

We propose a fully discrete fast Fourier-Galerkin method for solving an integral equation of the first kind with a logarithmic kernel on a smooth open arc,which is a reformulation of the Dirichlet problem of the Laplace equation in the *** optimal convergence order and quasi-linear complexity order of the proposed method are established.A precondition is *** this method with an efficient numerical integration algorithm for computing the single-layer potential defined on an open arc,we obtain the solution of the Dirichlet problem on a smooth open arc in the *** examples are presented to confirm the theoretical estimates and to demonstrate the efficiency and accuracy of the proposed method.

关键词： Dirichlet problem open arc singular boundary integral equations Fourier-Galerkin methods logarithmic potentials

An Aggregation Composition Compensation Method Based on Paired Net

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International Journal of Automation and computing 2012年第5期9卷 530-538页

作者： Xiao-Yong Mei 1,2 Yi-Yan Fan 2 Chang-Qin Huang 3 Ai-Jun Jiang 1 Shi-Xian Li 1 1 school of Information science and Technology,sun yat-sen university,guangzhou 510006,china 2 school of Computer science and Technology,Hunan university of Arts and science,Changde 415000,china 3 Department of Electrical Engineering and Computer science,university of California,Irvine,CA,92697,USA 1. school of Information science and Technology Sun Yat-sen University Guangzhou 510006 China 2. school of Computer science and Technology Hunan University of Arts and Science Changde 415000 China 3. Department of Electrical Engineering and Computer science University of California Irvine CA 92697 USA

With regard to the failure and cancellation of business logic of web services composition(WSC),this paper propose a novel web services transaction compensation mechanism based on paired net which can dynamically establish agile compensation-triggered process(CSCP-Nets),and satisfy prospective compensation *** related execution semantics of five usual composition compensation patterns based on paired net are analyzed in the situations of successful execution,failure compensation and failure *** net based application of trip reservation process(TRP) shows that it is feasible.

关键词： Web services composition failure handling composition compensation execution semantic analysis paired net

Broadband and fabrication-tolerant 3-dB couplers with topological valley edge modes

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Light(science & Applications) 2024年第8期13卷 1623-1630页

作者： Guo-Jing Tang Xiao-Dong Chen Lu sun Chao-Heng Guo Meng-Yu Li Zhong-Tao Tian Hou-Hong Chen Hong-Wei Wang Qi-Yao sun Ying-Di Pan Xin-Tao He Yi-Kai Su Jian-Wen Dong school of Physics&State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen UniversityGuangzhou 510275China State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China

3-dB couplers,which are commonly used in photonic integrated circuits for on-chip information processing,precision measurement,and quantum computing,face challenges in achieving robust performance due to their limited 3-dB bandwidths and sensitivity to fabrication *** address this,we introduce topological physics to nanophotonics,developing a framework for topological 3-dB *** couplers exhibit broad working wavelength range and robustness against fabrication dimensional *** leveraging valley-Hall topology and mirror symmetry,the photonic-crystal-slab couplers achieve ideal 3-dB splitting characterized by a wavelength-insensitive scattering *** analysis confirms the superiority on broad bandwidth of 48 nm and robust splitting against dimensional errors of 20 *** further propose a topological interferometer for on-chip distance measurement,which also exhibits robustness against dimensional *** extension of topological principles to the fields of interferometers,may open up new possibilities for constructing robust wavelength division multiplexing,temperature-drift-insensitive sensing,and optical coherence tomography applications.

关键词： topological splitting insensitive

A position-slots model for nucleosome assembly in the yeast genome based on integrated multi-platform positioning datasets

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A position-slots model for nucleosome assembly in the yeast ...

Shanghai Gynecologic Oncology Group’s consensus on the academic and industry’s clinical trial types

2009 Fourth International Conference on Bio-Inspired computing:Theories and Applications(BIC-TA2009)

作者： Jihua Feng,Xianhua Dai,Qian Xiang,Zhiming Dai,Jiang Wang,yangyang Deng,and Caisheng He school of Information science and Technology,sun yat-sen university,135 West Xin’gang Road,guangzhou,PR china

In-depth analysis of the recent five experimental nucleosome datasets reveals the broad disagreements between the final nucleosome positions detected by the previous *** signal processing methods,we found two distinct nucleosome distribution domains which evidently emerge from promoter and coding *** calculated and confirmed that the fuzzy nucleosomes fall into the dynamic domain,and well-positioned nucleosomes fall into the stable *** combining the domains information with gene properties,transcription factors binding sites(TFBs)and DNA bendability,we revealed the relationship between the two domains with TATA and TATAess ***,investigating the link between the two domains and the histone H3 modifications,we observed that the extremely rapid-replacing histone H3 occurs at the immediate downstream of transcription start sites(TSS)rather than+1 nucleosome ***,we presented a slots model for nucleosome assembly in the yeast genome to explain the mechanism of nucleosome forming in the genes promoter regions.

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中华医学杂志(英文版) 2024年第14期137卷 1744-1746页

作者： Shi Tingyan Liu Jihong Zhu Jianqing Wang Xipeng Jiang Wei Lu Xin Feng Weiwei Zhou Shengtao Shen yang Chen Gang Wu Zhenyu Zou Dongling Wu Peng yang Huijuan Wu Sufang Zhu Tao Wang Huaying Zhang Yingli Qiu lihua Guo Xiaoqing Xiang Libing Zhang Wei Ren Yulan Feng Yanling Liu Yanfei Chen Xiaojun Zang Rongyu Department of Gynecologic Oncology Fudan University Zhongshan Hospital Institute for Ovarian Cancer Fudan University Shanghai China Department of Gynecologic Oncology Sun Yat-Sen University Cancer Center State Key Laboratory of Oncology in South China Collaborative Innovation Center for Cancer Medicine Guangzhou Guangdong China Department of Gynecologic Oncology Zhejiang Cancer Hospital Hangzhou Zhejiang China Department of Obstetrics and Gynecology Xinhua Hospital Shanghai Jiaotong University School of Medicine Shanghai China Department of Gynecology Obstetrics and Gynecology Hospital Fudan University Shanghai China Department of Obstetrics and Gynecology Ruijin Hospital Shanghai Jiaotong University School of Medicine Shanghai China Department of Obstetrics and Gynecology Key Laboratory of Birth Defects and Related Diseases of Women and Children of MOE and State Key Laboratory of Biotherapy West China Second Hospital Sichuan University and Collaborative Innovation Center Chengdu Sichuan China Department of Obstetrics and Gynecology Zhongda Hospital School of Medicine Southeast University Nanjing Jiangsu China National Clinical Research Center for Gynecology and Obstetrics Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei China school of Public Health Key Laboratory of Public Health Safety and Collaborative Innovation Center of Social Risks Governance in Health Fudan University Shanghai China Gynecologic Oncology Center Chongqing University Cancer Hospital Chongqing China Department of Obstetrics and Gynecology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei China Department of Gynecologic Oncology Fudan University Shanghai Cancer Center Shanghai China Department of Obstetrics and Gynecology Shanghai General Hospital Shanghai Jiao Tong University School of Medicine Shanghai China Department of Obstetrics and Gynecology Renji Hospital School of Medicine

Shanghai Gynecologic Oncology Group (SGOG, www. ***), established in 2009, is a non-profit organization of clinical research and the full member of Gynecology Cancer Intergroup (GCIG) since 2012. It was guided by Drs. Jinghe Lang (china), Gavin Stuart (Canada) (2009-2020); Drs. Jinghe Lang (china), Ding Ma (china) (2021-) and was supported by Dr. Zeyi Cao (2009-2012). The mission of SGOG is to actively promote the investigator-initiated trial (IIT) in gynecologic cancers, particularly the innovative phase II clinical trials. Followed by the high quality of management in investigators’ training, trial development, human resources, and research funding, SGOG has initiated phase III clinical trials to improve the future clinical practice. SGOG aims to obtain reliable data by conducting systematic, standardized, and high-quality clinical trials, to guide the clinical practice of ovarian cancer, endometrial cancer, and cervical cancer in china. SGOG holds group meetings twice a year, and actively participates in GCIG international communication and cooperation that expands its international and national influence in the field of clinical research in gynecologic cancers. This coordination is not only particularly relevant between academic groups but also with national and/or international industry partners.

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Exploring Sulfur Chemistry in TMC-1 with NSRT

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Chinese Physics Letters 2024年第2期41卷 129-132页

作者： Wasim Iqbal Xiaohu Li Juan Tuo Ryszard Szczerba Yanan Feng Zhenzhen Miao Jiangchao yang Jixing Ge Gleb Fedoseev Donghui Quan Qiang Chang Chuan-Lu yang Tao yang Gao-Lei Hou Yong Zhang Xuan Fang Xia Zhang Fangfang Li Rong Ma Xiaomin Song Zhiping Kou Yuxuan sun Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Xinjiang Key Laboratory of Radio Astrophysics Urumqi 830011China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China university of Chinese Academy of sciences Beijing 100049China Nicolaus Copernicus Astronomical Center Rabia´nska 887-100 Toru´nPoland Research Laboratory for Astrochemistry Ural Federal UniversityKuibysheva St.48620026 EkaterinburgRussia Astronomical computing Research Center Zhejiang LaboratoryHangzhou 311100China school of Physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255000China school of Physics and Optoelectronic Engineering Ludong UniversityYantai 264025China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter School of PhysicsXi’an Jiaotong UniversityXi’an 710049China school of Physics and Astronomy Sun Yat-sen UniversityGuangzhou 510275China Laboratory for Space Research Faculty of ScienceThe University of Hong KongHong KongChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100012China

There have been several studies on sulfur depletion in dense cores like TMC-1(Taurus Molecular Cloud 1),employing updated reaction networks for sulfur species to explain the missing sulfur in the gas within dense *** of these studies used a C/O ratio of 0.7 or *** present NSRT(NanShan 26m Radio Telescope)observations of TMC-1 alongside results from time-dependent chemical simulations using an updated chemical *** findings highlight the impact of the C/O ratio on the gas-phase evolution of C2S and *** simulation results show that the C/O ratio is an important parameter,playing a fundamental role in determining the gas-phase abundances of sulfur species in dense cores.

关键词： sulfur Sulfur depletion