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Effects of drive imbalance on the particle emission from a Bose-Einstein condensate in a one-dimensional lattice

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Chinese Physics B 2024年第3期33卷 238-243页

作者：赖龙泉李照 School of Science Nanjing University of Posts and TelecommunicationsNanjing 210023China School of Electronic Engineering Chengdu Technological UniversityChengdu 611730China

Time-periodic driving has been an effective tool in the field of nonequilibrium quantum dynamics,which enables precise control of the particle *** investigate the collective emission of particles from a Bose-Einstein condensate in a one-dimensional lattice with periodic drives that are separate in modulation amplitudes and relative *** addition to the enhancement of particle emission,we find that amplitude imbalances lead to energy shift and band broadening,while typical relative phases may give rise to similar *** results offer insights into the specific manipulations of nonequilibrium quantum systems with tone-varying drives.

关键词： Bose-Einstein condensate particle emission periodic drive

Correlation Between Multiplicative Noises and Its Effects on Two-Mode Laser

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Chinese Physics Letters 1997年第8期14卷 593-596页

作者： long quan CAO Li WU Da-jin LI Zai-guang National Laboratory of Laser Technology Huazhong University of Science and TechnologyWuhan 430074 Department of Physics Huazhong University of Science and TechnologyWuhan 430074 CCAST(World Laboratory) P.O.Box 8730Beijing 100080

A two-mode laser cavity in which the optical paths of two modes can be separated and affected by different but correlated multiplicative noises(external disturbances)with the help of a noise introducing device is *** a corresponding mathematical model,it is found that the statistical properties of laser intensities depend strongly on the relationship between the noise correlation coefficient and the mode coupling constant.

关键词： separated introducing multiplicative

Effects of a Novel Drift Term Due to Cross Correlation Between Additive and Multiplicative Noises in a Single-Mode Laser

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Chinese Physics Letters 1998年第4期15卷 266-268页

It is found that a novel drift term,purely induced by cross correlation between multiplicative and additive noises,in the one-dimensional Langevin equation for a single-mode laser intensity has a significant effect on the intensity statistical properties near and below threshold,and when colored multiplicative noise is *** term makes the laser intensity fluctuations lower but effective eigenvalues larger for positive noise cross correlation.

关键词： noise intensity purely

Association between complementary factor H Y402H polymorphisms and age-related macular degeneration in Chinese: Systematic review and meta-analysis

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International Journal of Ophthalmology(English edition) 2012年第2期5卷 242-246页

作者： Yan-long quan Ai-Yi Zhou and Zhao-Hui Feng Department of Ophthalmology the Second Affiliated Hospital of Medical College of Xi'an Jiaotong University Xi'an 710004 Shaanxi Province China

AIM: Age-related macular degeneration (AMD) is the leading cause of blindness in the developed world and complement factor H (CFH) polymorphism has been found to associate with the AMD. To investigate whether the Y402H variant in CFH is associated with AMD in Chinese populations, a systematic review and meta-analysis were performed to estimate the magnitude of the gene effect and the possible mode of action. METHODS: A meta-analysis was performed using data available from ten case-control studies assessing association between the CFH Y402H polymorphism and AMD in Chinese populations involving 1538 AMD. Data extraction and study quality assessment were performed in duplicate. Summary odds ratios (ORs) and 95% confidence intervals (CIs) an allele contrast and genotype contrast were estimated usingfixed- effects models. The Q-statistic test was used to assess heterogeneity, and Funnel plot was used to evaluate publication bias. RESULTS: Seven of ten case-control studies were neovascular AMD, and few studies came from west and north of China. There was strong evidence for association between CFH and AMD in Chinese population, with those having risk allele C 2.35 times more likely to have AMD than subjects with T allele. Evidence of publication bias was not observed in our meta-analysis. CONCLUSION: This meta-analysis summarizes the strong evidence for an association between CFH and AMD in Chinese and indicates each C allele increasing the odds of AMD by 2.33-fold. But more evidences about the relation between CFH polymorphism and different type of Chinese AMD from various district were needed.

关键词： age-related macular degeneration complement factor H polymorphism meta-analysis Chinese population

Sequential analysis of dimethyl sulfur compounds in seawater

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Chinese Chemical Letters 2007年第1期18卷 99-102页

作者： Meng Li Dong Xing Yuan quan long Li Xiao Ying Jin State Key Lab of Marine Environmental Science Xiamen University Environmental Science Research Centre of Xiamen University Xiamen 361005 China

A sequential method for the determination of dimethyl sulfur compounds, including dimethylsulfide （DMS）, dimethylsulfonio- propionate （DMSP） and dimethylsulfoxide （DMSO）, in seawater samples has been developed. Detection limit of 2.5 pmol of DMS in 25 mL sample, corresponding to 0.10 nmol/L, was achieved. Recoveries for dimethyl sulfur compounds were in the range of 68.6- 78.3%. The relative standard deviations （R.S.D.s） for DMS, DMSP and DMSO determination were 3.0, 5.4 and 7.4%, respectively.

关键词： Dimethylsulfide (DMS) Dimethylsulfoniopropionate (DMSP) Dimethylsulfoxide (DMSO) Purge and trap Microwave irradiation Sequential analysis

Radio-Frequency Field-Induced quantum Interference Effects in Cold Atoms

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Chinese Physics Letters 2001年第11期18卷 1470-1472页

作者： long quan ZHOU Shu-Yu ZHOU ShamYu WANG Yu-Zhu Laboratory for quantum Optics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800

We propose constructing a quantum interference configuration for cold atoms in a magneto-optical trap by applying a radio frequency field, which coherently couples adjacent Zeeman sublevels, in combination with a repumping laser field. One effect of this interference is that a dip exists in the absorption of the repumping light when the radio frequency is scanned. Our prediction has been indirectly detected through the fluorescence of cold atoms in a preliminary experiment.

关键词： pumping quantum prediction

Fast and Error-Bounded Space-Variant Bilateral Filtering

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Journal of Computer Science & Technology 2019年第3期34卷 550-568页

作者： Meng-Ke Yuan long-quan Dai Dong-Ming Yan Li-Qiang Zhang Jun Xiao Xiao-Peng Zhang National Laboratory of Pattern Recognition Institute of AutomationChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Computer Science and Technology Nanjing University of Science and TechnologyNanjing 210094China State Key Laboratory of Remote Sensing Science School of GeographyBeijing Normal UniversityBeijing 100875China

The traditional space-invariant isotropic kernel utilized by a bilateral filter(BF)frequently leads to blurry edges and gradient reversal artifacts due to tlie existence of a large amount of outliers in the local averaging ***,the efficient and accurate cstiinatioii of space-variant k(4rnels which adapt to image structures,and the fast realization of the corresponding space-variant bilateral filtering are challenging *** address these problems,we present a space-variant BF(SVBF).and its linear time and error-bounded acceleration ***,we accurately estimate spacevariant,anisotropic kernels that vary with image structures in linear time through structure tensor and mininnini spanning ***,we perform SVBF in linear time using two error-bounded approximation methods,namely,low-rank tensor approximation via higher-order singular value decomposition and exponential sum *** proposed SVBF can efficiently achieve good edge-preserving *** validate the advantages of the proposed filter in applications including:image denoising,image enhancement,and image focus *** results(leinonstrate that our fast and error-bounded SVBF is superior to state-of-the-art methods.

关键词： error-bounded acceleration edge-aware smoothing space-variant bilateral filtering

泵控缸电液技术研究现状、存在问题及创新解决方案

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机械工程学报 2008年第11期44卷 87-92页

作者：权龙太原理工大学机械电子工程研究所太原030024

降低液压系统的能耗、噪声,减小废油处理对环境的污染,最直接的方法是采用无节流损失的泵控技术,通过改变泵转速或泵排量,使泵输出流量和压力与负载要求完全匹配。在论述泵控液压缸技术特征、现状和存在问题的基础上,根据双作用叶片泵(... 详细信息

降低液压系统的能耗、噪声,减小废油处理对环境的污染,最直接的方法是采用无节流损失的泵控技术,通过改变泵转速或泵排量,使泵输出流量和压力与负载要求完全匹配。在论述泵控液压缸技术特征、现状和存在问题的基础上,根据双作用叶片泵(马达)和轴向柱塞泵结构特点,提出两种新的配流原理,解决差动缸流量不对称影响控制的难题。采用新的配流原理,无需辅助元件,只用一台泵就可闭环控制差动缸的运动,具有能量效率高、结构紧凑和成本低的优势。进一步对这两种配流原理和采用这两种配流原理控制差动缸的系统集成方案作了论述和研究,研究成果对实现液压控制技术的绿色化具有理论和实际意义。

关键词：泵控缸差动缸电液控制技术

Top-down Approach for Fabrication of Polymer Microspheres by Interfacial Engineering

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Chinese Journal of Polymer Science 2020年第12期38卷 1286-1293页

作者： Yue Fan De-Hui Wang Jin-long Yang Jia-Ning Song Xiao-Mei Li Cheng-Lin Zhang Dong-Sheng Wang long-quan Chen Jia-Xi Cui Xu Deng Institute of Fundamental and Frontier Sciences Universityof Electronic Science and Technology of ChinaChengdu 610054China Deportment of Physics at Interfaces Max Planck Institute for Polymer ResearchAckermannweg 1055128MainzGermany School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinoChengdu 670054Chino School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China

Polymer microspheres with uniform size,composition,and surface property have gained extensive researches in past *** bottom-up approaches are using monomers or oligomers to build up desired polymer ***,directly shaping high-molecular-weight polymers into well-ordered polymer microspheres remains a great ***,we reported a facile and efficient top-down approach tofabricate microspheres with high-molecular-weight polymer *** harnessing interfacial engineering-control during the polymer microspheres formation,uniformly sized microspheres could be produced with widely ranged diameters(from 10μm to the capillary length of each polymer melt).The size limitation of this approach could be further extended by a controllable Plateau-Rayleigh instability ***,the top-down approach allows fabrication of microspheres by various polymer melts with surface energy higher than 25 mN/*** work paves a way for green,cost-effective,and customizable production of a variety of functional polymer microspheres without any chemical reaction assistant.

关键词： Superamphiphobic surfaces Microfluidic spinning Microfibers Microspheres