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| 1 | On the infimum problem of Hilbert space effects显示文摘The quantum effects for a physical system can be described by the set ε(H) of positive operators on a complex Hilbert space Hthat are bounded above by the identity operator Ⅰ. The infimum problem of Hilbert space effects is to find under what condition the infimum A∧B exists for two quantum effects A and B ∈ε(H). The problem has been studied in different contexts by R. Kadison, S. Gudder, M. Moreland, and T. Ando. In this note, using the method of the spectral theory of operators, we give a complete answer of the infimum problem. The characterizations of the existence of infimum A ∧ B for two effects A, B ∈ε(H) are established. | DU Hongke DENG Chunyuan LI Qihui | 2006 | Science China Mathematics2006，49，4： | 16 |
| 2 | Effects of Coal Rank and High Organic Sulfur on the Structure and Optical Properties of Coal-based Graphene Quantum Dots显示文摘Coal-based graphene quantum dots(GQDs) were successfully produced via a one-step chemical synthesis from six different coal ranks, from which two superhigh organic sulfur(SHOS) coals were selected as natural S-doped carbon sources for the preparation of S-doped GQDs. The effects of coal properties on coal-based GQDs were analyzed by means of high-resolution transmission electron microscopy(HRTEM), X-ray diffraction(XRD), Fourier transform infrared(FTIR) spectroscopy, X-ray photoelectron spectroscopy(XPS), ultraviolet-visible(UV-Vis) absorption spectroscopy, and fluorescence emission spectra. It was shown that all coal samples can be used to prepare GQDs, which emit bluegreen and blue fluorescence under ultraviolet light. Anthracite-based GQDs have a hexagonal crystal structure without defects, the largest size, and densely arranged carbon rings in their lamellae; the highrank bituminous coal-based GQDs are relatively reduced in size, with their hexagonal crystal structure being only faintly visible; the low-rank bituminous coal-based GQDs are the smallest, with sparse lattice fringes and visible internal defects. As the metamorphism of raw coals increases, the yield decreases and the fluorescence quantum yield(QY) initially increases and then decreases. Additionally, the surface of GQDs that were prepared using high-rank SHOS coal(high-rank bituminous coal) preserves rich sulfur content even after strong oxidation, which effectively adjusts the bandgap and improves the fluorescence QY. Thus, high-rank bituminous coal with SHOS content can be used as a natural S-doped carbon source to prepare S-doped GQDs, extending the clean utilization of low-grade coal. | TANG Yuegang HUAN Xuan LAN Chunyuan XU Miaoxin | 2018 | Acta Geologica Sinica(English Edition)2018，92，3： | 10 |
| 3 | Generation of graphene-based aerogel microspheres for broadband and tunable high-performance microwave absorption by electrospinning-freeze drying process显示文摘 | Fanbin Meng Huagao Wang Wei Zijian Chen Tian Li Chunyuan Li Yu Xuan Zuowan Zhou | 2018 | Nano Research2018，11，5： | 9 |
| 4 | METHOD FOR PRECISE CALCULATION OF ROOT STRESS OF SPIRAL BEVEL GEARS显示文摘METHODFORPRECISECALCULATIONOFROOTSTRESSOFSPIRALBEVELGEARSMETHODFORPRECISECALCULATIONOFROOTSTRESSOFSPIRALBEVELGEARSChenLiangyu... | Chen Liangyu Wang Yanzhong Zheng Xijian E Zhongkai Cai Chunyuan(Northeastern University) | 1994 | Chinese Journal of Mechanical Engineering1994，7，4： | 5 |
| 5 | Genetic variations in plant architecture traits in cotton(Gossypium hirsutum) revealed by a genomewide association study显示文摘Plant architecture traits influence crop yield. An understanding of the genetic basis of cotton plant architecture traits is beneficial for identifying favorable alleles and functional genes and breeding elite cultivars. We collected 121 cotton accessions including 100 brownfiber and 21 white-fiber accessions, genotyped them by whole-genome resequencing, and phenotyped them in multiple environments. This genome-wide association study(GWAS)identified 11 quantitative trait loci(QTL) for two plant architecture traits: plant height and fruit spur branch number. Negative-effect alleles were enriched in the elite cultivars. Based on these QTL, gene annotation information, and published QTL, candidate genes and natural genetic variations in four QTL were identified. Ghir_D02 G017510 and Ghir_D02 G017600 were identified as candidate genes for qD02-FSBN-1, and a premature start codon gain variation was found in Ghir_D02 G017510. Ghir_A12 G026570, the candidate gene of qA12-FSBN-2, belongs to the pectin lyase-like superfamily, and a significantly associated SNP, A12_105366045(T/C), in this gene represents an amino acid change. The QTL, candidate genes, and associated natural variations in this study are expected to lay a foundation for studying functional genes and developing breeding programs for desirable architecture in brown-fiber cotton. | Tianwang Wen Baosheng Dai Tao Wang Xinxin Liu Chunyuan You Zhongxu Lin | 2019 | The Crop Journal2019，7，2： | 4 |
| 6 | SERS-based mercury ion detections:principles,strategies and recent advances显示文摘Mercury ion(Hg^(2+)),known as one of the highly toxic and soluble heavy metal ions,is causing serious environmental pollution and irreversible damage to the health.It is urgent to develop some rapid and ultrasensitive methods for detecting trace mercury ions in the environment especially drink water.Surface-enhanced Raman scattering(SERS)is considered as a novel and powerful optical analysis technique since it has the significant advantages of ultra-sensitivity and high specificity.In recent years,the SERS technique and its application in the detection of Hg^(2+)have become more prevalent and compelling.This review provides an overall survey of the development of SERS-based Hg^(2+)detections and presents a summary relating to the basic principles,detection strategies,recent advances and current challenges of SERS for Hg^(2+)detections. | chunyuan song boyue yang yanjun yang lianhui wang | 2016 | Science China Chemistry2016，59，1： | 4 |
| 7 | Single-Step Organization of Plasmonic Gold Metamaterials with Self-Assembled DNA Nanostructures显示文摘Self-assembled DNA nanostructures hold great promise as nanoscale templates for organizing nanoparticles(NPs)with nearatomistic resolution.However,large-scale organization of NPs with high yield is highly desirable for nanoelectronics and nanophotonic applications.Here,we design fve-strand DNA tiles that can readily self-assemble into well-organized micrometerscale DNA nanostructures.By organizing gold nanoparticles(AuNPs)on these self-assembled DNA nanostructures,we realize the fabrication of one-and two-dimensional Au nanostructures in single steps.We further demonstrate the one-pot synthesis of Au metamaterials for highly amplifed surface-enhanced Raman Scattering(SERS).Tis single-step and high-yield strategy thus holds great potential for fabricating plasmonic metamaterials. | Shaokang Ren Jun Wang Chunyuan Song Qian Li Yanjun Yang Nan Teng Shao Su Dan Zhu Wei Huang Jie Chao Lianhui Wang Chunhai Fan | 2019 | Research2019，，1： | 4 |
| 8 | Time-division phase modulated single-photon interference in a Sagnac interferometer显示文摘We introduce a stable, long-distance single- photon Sagnac interferometer, which has a balanced con-figuration to efficiently compensate phase drift caused by change of the fiber-optic path. By using time-division phase modulation, single-photon interference was realized at 1550 nm in a 5-km-long as well as 27-km-long Sagnac fiber loops, with a fringe visibility higher than 90% and long-term sta-bility. The stable performance of the single-photon interfer-ence indicated that the time-division phase-modulated Sag- nac interferometer might readily lead to practical applica-tions in single-photon routing and quantum cryptography. | WU Guang, ZHOU Chunyuan & ZENG Heping Key Laboratory of Optical and Magnetic Resonance Spectroscopy and Department of Physics, East China Normal University, Shanghai 200062, China Correspondence should be addressed to Zeng Heping (e-mail: hpzeng @phy.ecnu.edu.cn) | 2003 | Chinese Science Bulletin2003，48，16： | 4 |
| 9 | Preparation, Crystal Structure and Properties of a New Crystal Form of Diammonium 5,5'-bistetrazole-1,1'-diolate显示文摘 | Xiaojun Wang Shaohua Jin Chunyuan Zhang Lijie Li Shusen Chen Qinghai Shu | 2015 | Chinese Journal of Chemistry2015，33，11： | 3 |
| 10 | The Nonlinear Bifurcation and Chaos of Coupled Heave and Pitch Motions of a Truss Spar Platform显示文摘This paper presents the results from a numerical study on the nonlinear dynamic behaviors including bifurcation and chaos of a truss spar platform. In view of the mutual influences between the heave and the pitch modes, the coupled heave and pitch motion equations of the spar platform hull were established in the regular waves. In order to analyze the nonlinear motions of the platform, three-dimensional maximum Lyapunov exponent graphs and the bifurcation graphs were constructed, the Poincaré maps and the power spectrums of the platform response were calculated. It was found that the platform motions are sensitive to wave frequency. With changing wave frequency, the platform undergoes complicated nonlinear motions, including 1/2 sub-harmonic motion, quasi-periodic motion and chaotic motion. When the wave frequency approaches the natural frequency of the heave mode of the platform, the platform moves with quasi-periodic motion and chaotic motional ternately. For a certain range of wave frequencies, the platform moves with totally chaotic motion. The range of wave frequencies which leads to chaotic motion of the platform increases with increasing wave height. The three-dimensional maximum Lyapunov exponent graphs and the bifurcation graphs reveal the nonlinear motions of the spar platform under different wave conditions. | HUANG Lei LIU Liqin LIU Chunyuan TANG Yougang | 2015 | Journal of Ocean University of China2015，14，5： | 3 |
| 11 | Research on Fault-tolerant Operation Strategy of Rectifier of Square Wave Motor in Wind Power System显示文摘In wind power system,the randomness of wind energy increases the probability of components fault.once the switch fault of the PWM rectifier is detected,it will lead to the distortion of the motor voltage and current waveform,the increase of torque ripple,the fluctuation of filter capacitor voltage,and the increase of harmonic content,which will affect the control performance and operation safety of the system.A common fault in a three-phase PWM rectifier is the open-circuit fault of the switch.This paper analyzes the current waveform distortion of the square wave motor when the rectifier switch fault,and proposes different fault-tolerant control strategies for different situations of switch fault,include single,double and triple switches fault.This method is based on several special driving modes under power generation situation of square wave motor.The strategy is easy to implement and does not need to change the circuit topology.It can realize fault-tolerant control of switch faults in the same side half bridge or the same bridge arm of the three-phase PWM rectifier.The effectiveness of the proposed fault-tolerant strategy is verified by simulation and experiment at the end of the article. | Chunyuan Bian Shangyue Liu Haiyang Xing Yulong Jia | 2021 | CES Transactions on Electrical Machines and Systems2021，5，1： | 3 |
| 12 | Kinetics of Solvent Blue and Reactive Yellow removal using microwave radiation in combination with nanoscale zero-valent iron显示文摘We investigated the efficiency and kinetics of the degradation of soluble dyes over the p H range 5.0–9.0 using a method employing microwave radiation in combination with nanoscale zero-valent iron(MW–n ZVI). The n ZVI particles(40–70 nm in diameter) were prepared by a liquid-phase chemical reduction method employing starch as a dispersant.Compared to the removal of Solvent Blue 36 and Reactive Yellow K-RN using only n ZVI,more rapid and efficient dye removal and total organic carbon removal were achieved using MW–n ZVI. The dye removal efficiency increased significantly with decreasing p H, but was negligibly affected by variation in the microwave power. The kinetics of dye removal by MW–n ZVI followed both an empirical equation and the pseudo first-order model, while the kinetics of dye removal using n ZVI could only be described by an empirical equation. It was also concluded that microwave heating of the dye solutions as well as acceleration of corrosion of n ZVI and consumption of Fe(II) were possible reasons behind the enhanced dye degradation. | Yanpeng Mao Zhenqian Xi Wenlong Wang Chunyuan Ma Qinyan Yue | 2015 | Journal of Environmental Sciences2015，27，4： | 3 |
| 13 | ON CLASSICAL BCH CODES AND QUANTUM BCH CODES显示文摘It is a regular way of constructing quantum error-correcting codes via codes with self-orthogonal property, and whether a classical Bose-Chaudhuri-Hocquenghem (BCH) code is self-orthogonal can be determined by its designed distance. In this paper, we give the sufficient and necessary condition for arbitrary classical BCH codes with self-orthogonal property through algorithms. We also give a better upper bound of the designed distance of a classical narrow-sense BCH code which contains its Euclidean dual. Besides these, we also give one algorithm to compute the dimension of these codes. The complexity of all algorithms is analyzed. Then the results can be applied to construct a series of quantum BCH codes via the famous CSS constructions. | Xu Yajie Ma Zhi Zhang Chunyuan | 2009 | Journal of Electronics(China)2009，26，1： | 2 |
| 14 | RNA modifications:importance in immune cell biology and related diseases显示文摘RNA modifications have become hot topics recently.By influencing RNA processes,including generation,transportation,function,and metabolization,they act as critical regulators of cell biology.The immune cell abnormality in human diseases is also a research focus and progressing rapidly these years.Studies have demonstrated that RNA modifications participate in the multiple biological processes of immune cells,including development,differentiation,activation,migration,and polarization,thereby modulating the immune responses and are involved in some immune related diseases.In this review,we present existing knowledge of the biological functions and underlying mechanisms of RNA modifications,including N6-methyladenosine(m^(6)A),5-methylcytosine(m^(5)C),N1-methyladenosine(m1 A),N7-methylguanosine(m^(7)G),N4-acetylcytosine(ac^(4)C),pseudouridine(Ψ),uridylation,and adenosine-to-inosine(A-to-I)RNA editing,and summarize their critical roles in immune cell biology.Via regulating the biological processes of immune cells,RNA modifications can participate in the pathogenesis of immune related diseases,such as cancers,infection,inflammatory and autoimmune diseases.We further highlight the challenges and future directions based on the existing knowledge.All in all,this review will provide helpful knowledge as well as novel ideas for the researchers in this area. | Lian Cui Rui Ma Jiangluyi Cai Chunyuan Guo Zeyu Chen Lingling Yao Yuanyuan Wang Rui Fan Xin Wang Yuling Shi | 2022 | Signal Transduction and Targeted Therapy2022，7，10： | 2 |
| 15 | On γ-ray laser显示文摘We review various possibilities for realizing a γ-ray laser. We conclude that, similar to the free-electron laser, it is practical to generate the γ-ray laser by the stimulated emission of radiation from wiggling positrons channelled in a periodically bent crystal. It is the time to research this possibility both theoretically and experimentally with big efforts. | Qiren Zhang Chunyuan Gao Shude Yao | 2001 | Chinese Science Bulletin2001，46，15： | 2 |
| 16 | Aggregation and luminescence in carbonized polymer dots显示文摘The aggregate luminescence behavior of organic luminescent materials has been studied extensively.As a new kind of luminescent nanomaterials,carbonized polymer dots(CPDs)not only inherit the stability and biocompatibility of carbon materials,but also possess the luminescence tunability,water solubility,and high photoluminescence quantum yield of organic luminescent materials,rendering them a strong candidate for the next generation of light-emitting materials.Previously,people mainly understood its luminescence from the perspective of carbon materials,but some luminescence mechanisms are still unclear.In this review,we discuss the luminescence mechanism by referring to organic luminescent materials with emphasis on their aggregation behavior.Firstly,three representative aggregate luminescence phenomena of organic luminescent materials are briefly introduced.Chromophores present in CPDs are elaborated to further discuss the potential interactions between them,with emphasis on the role of crosslinked polymer networks.On this basis,some special luminescence phenomena of CPDs in the aggregate state are summarized,and relevant mechanisms are discussed in detail to consolidate relevant statements. | Chunyuan Kang Songyuan Tao Fan Yang Bai Yang | 2022 | Aggregate2022，3，2： | 2 |
| 17 | Quantum key distribution in 50-km optic fibers显示文摘In this paper, we report our recent experiment of long-distance fiber-optic plug and play quantum cryptography system wherein a Faraday-Mirror was used to compensate for the polarization mode dispersion and phase drifts. The pulse-biased coincident gate single-photon detection technique was used to effectively reduce the noises from the detrimental Rayleigh backscattering. We have achieved a quantum key distribution system with the working distance of 50 km, which was tested to be stable in more than 6 hours continuous work. And we also demonstrated the practical quantum communication in a local area network using the TCP protocol. | ZHOU Chunyuan WU Guang CHEN Xiuliang LI Hexiang ZENG Heping | 2004 | Science China(Physics,Mechanics & Astronomy)2004，47，2： | 2 |
| 18 | Hydroxyl radical reactions with 2-chlorophenol as a model for oxidation in supercritical water显示文摘 | Jiaming Zhang Chunyuan Ma Youmin Sun Xiaohua Ren | 2014 | Research on Chemical Intermediates2014，，3： | 2 |
| 19 | Temperature and symmetry energy of neutron-rich fragments in the 1A GeV^(124,136)Xe+Pb reactions显示文摘In this work we study the symmetry-energy coefficient of neutron-rich nuclei,and the temperature dependence of nuclear symmetry energy at low temperatures.An isobaric method is used to extract the symmetry-energy coefficients of neutron-rich nucleus(asym) at zero temperature(T) and asym/T at nonzero temperature in the measured 1A GeV124,136Xe+Pb reactions.T of fragment is obtained from the ratio of its asym to asym/T.The results show that,for fragment with the same neutron-excess(I=N Z),the heavier the fragment is,the higher T it has,and T tends to saturate around 1 MeV for the large mass fragments.It is also shown that the more neutron-rich the isobar is,the higher temperature it has.The T2dependence of symmetry energy of finite nucleus at low temperatures is verified by the extracted results. | MA Chunwang QIAO Chunyuan WANG Shanshan LU Fangmei CHEN Li GUO Meiting | 2013 | Nuclear Science and Techniques2013，24，5： | 2 |
| 20 | Leucine Supplementation in a Chronically Protein-Restricted Diet Enhances Muscle Weight and Postprandial Protein Synthesis of Skeletal Muscle by Promoting the mTOR Pathway in Adult Rats显示文摘 | Bo Zhang Licui Chu Hong Liu Chunyuan Xie Shiyan Qiao Xiangfang Zeng | 2017 | Engineering2017，3，5： | 2 |
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