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Bipartite Bell Inequality and Maximal Violationt

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Communications in Theoretical Physics 2011年第3期55卷 418-420页

作者： LIMing fei Shao-Ming Xian-qing Li-Jost College of Mathematics and Computational Science China University of Petroleum Dongying 257061 China School of Mathematical Sciences Capital Normal University Beijing 100048 China Max-Planck-Institute for Mathematics in the Sciences Leipzig 04103 Germany Department of Mathematics Hainan Normal University Haikou 571185 China

We present new bell inequalities for arbitrary dimensional bipartite quantum systems. The maximal violation of the inequalities is computed. The Bell inequality is capable of detecting quantum entanglement of both pur... 详细信息

关键词： entanglement bipartite system Bell inequality

A novel caged-prenylxanthone from Garcinia bracteata

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Chinese Chemical Letters 2010年第4期21卷 443-445页

作者： Na, Zhi Hu, Hua Bin Fan, qing fei Chinese Acad Sci Xishuangbanna Trop Bot Garden Mengla 666303 Peoples R China

A novel caged-prenylxanthone xanthone,neobractatin(1),was isolated from the twig of Garcinia *** structure was elucidated by spectroscopic methods,especially 2D NMR techniques.

关键词： Garcinia bracteata Caged-prenylxanthone Neobractatin

Numerical investigation and design of thin-walled complex section steel columns

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第2期12卷 131-138页

作者： Su-qing HUANG Ju CHEN Wei-liang jin Department of Civil Engineering Zhejiang College of Construction Hangzhou 311200 China Department of Civil Engineering Zhejiang University Hangzhou 310058 China

A numerical investigation of thin-walled complex section steel columns with intermediate stiffeners was performed using finite element analysis. An accurate and reliable finite element model was developed and verified against test results. Veri-fication indicates that the model could predict the ultimate strengths and failure modes of the tested columns with reasonable accuracy. Therefore,the developed model was used for the parametric study. In addition,the effect of geometric imperfection on column ultimate strength and the effect of boundary conditions on the elastic distortional buckling of complex section columns were investigated. An equation for the elastic distortional buckling load of fixed-ended columns having different column lengths was proposed. The elastic distortional buckling load obtained from the proposed equation was used in the direct strength method to calculate the column ultimate strength. Generally,it is shown that the proposed design equation conservatively predicted the ultimate strengths of complex section columns with different column lengths.

关键词： Complex section column Distortional buckling Finite element method (FEM) Intermediate stiffener

Fine mapping and candidate gene prediction of the photoperiod and thermo-sensitive genic male sterile gene pms1(t) in rice

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第6期12卷 436-447页

作者： Yuan-fei ZHOU Xian-yin ZHANG qing-zhong XUE Department of Agronomy College of Agriculture and Biotechnology Zhejiang University Hangzhou 310029 China

Pei＇ai64S, an indica sterile variety with photoperiod and thermo-sensitive genic male sterile （PTGMS） genes, has been widely exploited for commercial seed production for ＂two-line＂ hybrid rice in China. One PTGMS gene from Pei＇ai64S, pmsl（t）, was mapped by a strategy of bulked-extreme and recessive-class approach with simple sequence repeat （SSR） and insert and deletion （In-Del） markers. Using linkage analysis for the F2 mapping population consisting of 320 completely male sterile individuals derived from a cross between Pei＇ai64S and 93-11 （indica restorer） lines, the pmsl（t） gene was delimited to the region between the RM21242 （0.2 cM） and YF11 （0.2 cM） markers on the short arm of chromosome 7. The interval containing the pmsl（t） locus, which was co-segregated with RM6776, is a 101.1 kb region based on the Nipponbare rice genome. Fourteen predicted loci were found in this region by the Institute for Genomic Research （TIGR） Genomic Annotation. Based on the function of the locus LOC_Os07g12130 by bioinformatics analysis, it is predicted to encode a protein containing a Myb-like DNA-binding domain, and may process the transcript with thermosensory response. The reverse transcription-polymerase chain reaction （RT-PCR） results revealed that the mRNA levels of LOC_Os07g12130 were altered in different photoperiod and temperature treatments. Thus, the LOC_Os07g12130 locus is the most likely candidate gene for pmsl（t）. These results may facilitate not only using the molecular marker assisted selection of PTGMS genes, but also cloning of the pmsl（t） gene itself.

关键词： Super hybrid rice pmsl(t) Photoperiod and thermo-sensitive male sterile gene Genetic mapping

Record-breaking rainfall over the middle reaches of the Yangtze River in August 2021: Sub-seasonal perspective and its predictability

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Advances in Climate Change Research 2022年第6期13卷 826-834页

作者： Li GUO Jie WU jin-qing ZUO Climate Studies Key Laboratory National Climate CenterChina Meteorological AdministrationBeijing 100081China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD) Nanjing University of Information Science&TechnologyNanjing 210066China

An extremely heavy rainfall cluster was observed over the middle reaches of the Yangtze River(MYR)in August 2021,breaking the historical record since 1981 and causing severe *** controlling circulation regime and possible predictability sources of the un-expected rainfall are still unclear,especially from a sub-seasonal *** results show that the successive heavy rainfall events in August 2021 had significant intraseasonal oscillations for 10-24 d and 30-60 d,and they were synergistically influenced by tropical and extra-tropical circulation *** all,the East Asia-Pacific teleconnection pattern(EAP)turned into a negative phase in late July and maintained throughout August,providing favorable background conditions for the northward transport of tropical water vapor and the southward intrusion of cold air from mid-high *** 30-60-d oscillation of precipitation was dominated by the first mode of boreal summer intraseasonal oscillation(BSISO1,with 30-60-d period),which strengthened the tropical moisture transport,while the quasi-biweekly oscillation of the western Pacific subtropical high and the anomalous mid-latitude cyclone of EAP intensified the precipitation on the scale of 10-24 *** addition,the second mode of BSISO(BSISO2,with 10-30-d period)may also intensify the 10-24-d precipitation in late *** forecast leading time of the S2S models for the persistent heavy rainfall in August 2021 was basically 1-2 weeks,while the EAP and BSISO1 were revealed as the main predictable sources of the abnormal rainfall *** results highlight the importance of superposition of different intraseasonal oscillations in forming the extreme rainfall event and demonstrate a potential chance to enhance the prediction skill of extreme event if the ensemble members in S2S models could be reasonably selected according to their performances on key predictability sources.

关键词： Heavy rainfalls Intraseasonal oscillation Predictability East Asia-Pacific teleconnection pattern Boreal summer intraseasonal oscillation

Exact Solutions to the Quantum Rabi-Stark Model Within Tunable Coherent States

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Communications in Theoretical Physics 2019年第5期71卷 623-628页

作者： You-fei Xie qing-Hu Chen Department of Physics Zhejiang UniversityHangzhou310027China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing210093China

The quantum Rabi-Stark model, where the linear dipole coupling and the nonlinear Stark-like coupling is present on an equal footing, is studied within the tunable extended coherent states. The eigenvalues and eigenstates are therefore obtained exactly. Surprisingly, the entanglement entropy in the ground-state is found to jump suddenly with the coupling strength. The first-order quantum phase transition can be detected by level crossing of the ground state and the first excited state, which is however lacking in the original linear quantum Rabi model. Performing the first-order approximation in the present theory, we can derive closed-form analytical results for the ground-state. Interestingly, it agrees well with the exact solutions up to the ultra-strong coupling regime in a wide range of model parameters. The spectral collapses when the absolute value of the nonlinear coupling strength approaches to twice the cavity frequency is observed with the help of new solutions in the limits.

关键词： extended coherent states exact eigenvalues first-order phase transitions spectral collapse

From Furan to High Quality Bio-based Poly(ethylene furandicarboxylate)

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Chinese Journal of Polymer Science 2018年第6期36卷 720-727页

作者： jing-Gang Wang Xiao-qing Liu jin Zhu Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Bio-basedPolymeric Materials of Zhejiang Province Ningbo 315201China

2,5-Furandicarboxylic acid（2,5-FDCA） has been regarded as the ideal bio-based alternative to terephthalic acid（TPA）. In recent years, great efforts have been made to synthesize 2,5-FDCA through the following methods：（1） oxidation of 5-hydroxymethylfurfural（HMF） in the presence of complex biocatalyst or metallic catalyst;（2） conversion of 2-furoic acid via the well-known Henkel Reaction. Herein, a new strategy for the synthesis of 2,5-FDCA from furan and acetic anhydride under mild condition is reported. The purity of the resulted 2,5-FDCA was above 99.9%. Acetic acid and iodoform generated in the reaction were recyclable and no other harmful by-products were detected. The thus-obtained 2,5-FDCA was applied for the preparation of poly（ethylene furandicarboxylate）（PEF） of high quality in terms of high molecular weight and good appearance.

关键词： 2 5-Furandicarboxylic acid(2 5-FDCA) 2 5-Diacetylfuran(2 5-DAF) Iodoform reaction Furan Poly(ethylene furandicarboxylate)

Fluorescent probes for detection of biothiols based on “aromatic nucleophilic substitution-rearrangement” mechanism

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Chinese Chemical Letters 2019年第10期30卷 1791-1798页

作者： Yan-fei Kang Li-Ya Niu qing-Zheng Yang Hebei Key Laboratory of Quality&Safety Analysis-Testing for Agro-Products and Food and College of Laboratory MedicineHebei North UniversityZhangjiakou 075000China Key Laboratory of Radiopharmaceuticals Ministry of EducationCollege of ChemistryBeijing Normal UniversityBeijing 100875China

Biothiols,including cysteine(Cys),homocysteine(Hey),and glutathione(GSH) play important roles in physiological processes,and the detection of thiol using fluorescent probes has attracted attention due to their high sensitivity and selectively and invasive on-time ***,the similar structures and reactivity of these biothiols present great challenges for selective *** review focused on the the "aromatic nucleophilic substitution-rearrangement(SNAr-rearrangement) mechanism",which provided a powerful tool to design fluorescent probes for the discrimination between *** classify the fluorescent probes according to types of fluorophores,such as difluoroboron dipyrromethene(BODIPY),nitrobenzoxadiazole(NBD),cyanine,pyronin,naphthalimide,coumarin,and so *** hope this review will inspire exploration of new fluorescent probes for biothiols and other relevant analytes.

关键词： Biothiols Fluorescent probes Aromatic nucleophilic substitution Rearrangement Fluorophores Bioapplication

Development of a database system for operational use in the selection of titanium alloys

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International Journal of Minerals,Metallurgy and Materials 2011年第4期18卷 444-449页

作者： Yuan-fei Han Wei-dong Zeng Yu Sun Yong-qing Zhao State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi＇an 710072 China Northwest Institute for Nonferrous Metal Research Xi＇an 710016 China

The selection of titanium alloys has become a complex decision-making task due to the growing number of creation and utilization for titanium alloys,with each having its own characteristics,advantages,and *** choosing the most appropriate titanium alloys,it is very essential to offer a reasonable and intelligent service for technical *** possible solution of this problem is to develop a database system（DS） to help retrieve rational proposals from different databases and information sources and analyze them to provide useful and explicit *** this purpose,a design strategy of the fuzzy set theory is proposed,and a distributed database system is *** ranking of the candidate titanium alloys,the most suitable material is *** is found that the selection results are in good agreement with the practical situation.

关键词： titanium alloys database system fuzzy set theory evaluation