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Current Medical Science 2020年第2期40卷 372-379页

作者： Dong-xun LI Gao-lin SHU wei-jun WANG Yang WU Huan-cai NIU Changping District Center for Disease Control and Prevention Bejing 102206China

Pseudomonas aeruginosa(P:aeruginosa)is a major opportunistic pathogen in hospital-acquired ***,carly diagnosis is the best strategy for fighting against these *** this report,we incorporated multiple crOsS displacement amplification(MCDA)combined with the malachite green(MG)for rapid,sensitive,specific and visual detection of *** by targeting the oprl *** MCDA-MG assay was conducted at 67°C for only 40 min during the amplification stage,and then products were directly detected by using colorimetric indicators(MG),eliminating the use of an electrophoresis instrument or amplicon analysis *** entire process,including specimen processing(35 min),amplification(40 min)and detection(5 min),can be finished within 80 *** 30 *** strains tested negative,indicating the high specificity of the MCDA *** analytical sensitivity of the MCDA-MG assay was 100 fg of genomic templates per reaction in pure culture,which was in complete accordance with MCDA by gel clectrophoresis and real-time *** assay was also successfully applied to detecting *** in stool ***,the rapidity,simplicity,and nearly equipment free platform of the MCDA-MG technique make it possible for clinical diagnosis,and more.

关键词： Pseudomonas aeruginosa multiple cross displacement amplification malachite green multiple cross displacement amplification combined with the malachite green

The Existence of a Meridional Curve in Closed Incompressible Surfaces in Fully Alternating link Complements

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Chinese Annals of Mathematics,Series B 2024年第1期45卷 73-80页

作者： wei lin School of Mathematical Sciences Dalian University of TechnologyDalian 116024LiaoningChina

Menasco showed that a closed incompressible surface in the complement of a non-split prime alternating link in S^(3) contains a circle isotopic in the link complement to a meridian of the *** on this result,he was able to argue the hyperbolicity of non-split prime alternating links in *** et *** that if F■S×I\L is an essential torus,then F contains a circle which is isotopic in S×I\L to a meridian of *** author generalizes his result as follows:Let S be a closed orientable surface,L be a fully alternating link in S×I\If F ■ S×I\L is a closed essential surface,then F contains a circle which is isotopic in S×I\L to a meridian of L.

关键词： Fully alternating Incompressible surfaces Meridionally incompressible

Running coupling constant at finite chemical potential and magnetic field from holography

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Chinese Physics C 2022年第7期46卷 8-14页

作者： xun Chen lin Zhang Defu Hou School of Nuclear Science and Technology University of South China Hengyang 421001China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Central China Normal University Wuhan 430079China

According to gauge/gravity duality,we use an Einstein-Maxwell-dilaton(EMD)model to study the running coupling constant at finite chemical potential and magnetic ***,we calculate the effect of temperature on the running coupling constant and find the results are qualitatively consistent with lattice guage ***,we calculate the effect of chemical potential and magnetic field on running *** is found that the chemical potential and magnetic field both suppress the running coupling ***,the effect of the magnetic field is slightly larger than that of chemical potential for a fixed *** with the confinement phase,the magnetic field has a large influence on the running coupling in the deconfinement phase.

关键词： holographic QCD magnetic field running coupling

Asymptotic Tracking Control for Wind Turbines in Variable Speed Mode

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IEEE/CAA Journal of Automatica Sinica 2017年第3期4卷 569-576页

作者： wei lin Zongtao Lu wei wei Dongguan University of Technology Dongguan 523808China Department of Electrical Engineering and Computer Science Case Western Reserve University

This paper presents a variable speed control strategy for wind turbines in order to capture maximum wind *** turbines are modeled as a two-mass drive-train system with generator torque *** on the obtained wind turbine model,variable speed control schemes are *** tracking controllers are designed to achieve asymptotic tracking for a prescribed rotor speed reference signal so as to yield maximum wind power *** to the difficulty of torsional angle measurement,an observer-based control scheme that uses only rotor speed information is further developed for global asymptotic output *** effectiveness of the proposed control methods is illustrated by simulation results.

关键词： Asymptotic tracking partial-state and output feedback two-mass drive-train model variable speed control wind turbines

A bio-inspired optical imaging method for robotic perception in turbid water

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Science China Technological Sciences 2025年第1期 79-81页

作者： Xudong SUN Yafeng LI Peng lin Xiaodi SHANG Xianping FU School of Information Science and Technology Dalian Maritime University College of Computer Science and Technology Qingdao University

In the realm of underwater robotics, optical imaging plays a pivotal role in many scientific researches. Due to the effects of absorption and scattering,images captured in turbid water are severely degraded. Therefore, enhancing the quality of underwater optical images stands paramount in ensuring the continued advancement and efficacy of underwater robots across its multifarious applications.

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Quantum Confinement in GaAs Microcrystallites Embedded in SiO_(2) Thin Film

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Chinese Physics Letters 1996年第10期13卷 797-800页

作者： SHI Wang-zhou lin Kui-xun lin Xuan-ying QI Zhen-zhong Institute of Material Science Shantou UniversityShantou 515063 Centre of Information Storage Shanghai Jiaotong UniversityShanghai 200030

Semiconductor GaAs microcrystallites were embedded in SiO_(2) thin films by magnetron rf cosputtering *** of the thin films were characterized by transmission electron microscopy,x-ray diffraction and x-ray photoelectron *** size of microcrystallites,depending on the substrate temperature during deposition,is *** spectra of the films were *** shift of absorption edge was observed and discussed according to quantum confinement effect.

关键词： technique. Quantum Embedded

Optical Absorption in SiGe/Si Quantum Well Structures Created by Subband Transitions

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Chinese Physics Letters 2001年第12期18卷 1655-1657页

作者： YANG Yu MAO Xu YANG Hong-wei ZHOU wei ZHOU Zhen-Lai LIU Huan-lin WANG xun Department of Materials Science and Engineering Yunnan UniversityKunming 650091 Surface Physics Laboratory Fudan UniversityShanghai 200433

The absorption in Si_(1-x)Ge_(x)/Si multiple quantum-well structures is measured. Several separated well absorption peaks corresponding to both intersubband and intervalence band transitions in the samples are observed. In the normal incidence, two broadband peaks are attributed to intervalence band transitions HH0-SO0(2.5μm),HH_(0)-LH_(0)(~ 3μm), respectively. Using 45° incidence of unpolarized light, both the intervalence band and intersubband transitions are observed. The intervalence band transitions (HH_(0)-LH_(0) ) are Ge composition dependent, but the intersubband transitions, HH_(0)-HH_(1) (5.9μm) and HH_(0)-HH_(2)( 4.3 μm), are not sensitive to the Ge composition.

关键词： transitions valence absorption

Cost-effective and emission-cutting water heating system based on a novel bi-level expanded P-graph configuration optimization method

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Building Simulation 2023年第8期16卷 1519-1537页

作者： Haosheng lin wei Wu School of Energy and Environment City University of Hong KongHong KongChina Chengdu Research Institute City University of Hong KongChengduChina

Domestic hot water(DHW)systems contribute significantly to the building sector’s energy consumption and carbon emissions,making innovative optimization methods crucial for enhancing DHW energy *** DHW system optimizations focus on design parameters and operation modes,but their applicability is limited to specific systems and configurations,overlooking more efficient *** overcome this problem,combining visualized graphic and algebraic techniques,this study introduces a novel bi-level expanded Process Graph optimization method(BEPGOM)to optimize a DHW system with diverse *** effectively identifies nontrivial configurations,substantially improving economic and environmental benefits,and enhances solvability with a 98%reduction in solution *** optimal configuration,consisting of solar heating,PCM tank,and natural gas water heater,reduces the expenditures by 18%and equivalent CO_(2) emission by 34%compared to the existing base case,greatly exceeding the traditional optimization *** adaptability,efficiency,and accessibility make BEPGOM a valuable tool in advancing energy system design and promoting carbon neutrality in the building sector.

关键词： energy system configuration optimization P-graph domestic hot water thermal storage

An ANN-exhaustive-listing method for optimization of multiple building shapes and envelope properties with maximum thermal performance

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Frontiers in Energy 2021年第2期15卷 550-563页

作者： Yaolin lin wei YANG School of Mechanical and Automotive Engineering Shanghai University of Engineering ScienceShanghai 201620China School of Civil Engineering and Architecture Wuhan University of TechnologyWuhan 430070China College of Engineering and Science Victoria UniversityMelbourne 8001Australia

With increasing awareness of sustainability, demands on optimized design of building shapes with a view to maximize its thermal performance have become stronger. Current research focuses more on building envelopes than shapes, and thermal comfort of building occupants has not been considered in maximizing thermal performance in building shape optimization. This paper attempts to develop an innovative ANN (artificial neural network)-exhaustive-listing method to optimize the building shapes and envelope physical properties in achieving maximum thermal performance as measured by both thermal load and comfort hour. After verified, the developed method is applied to four different building shapes in five different climate zones in China. It is found that the building shape needs to be treated separately to achieve sufficient accuracy of prediction of thermal performance and that the ANN is an accurate technique to develop models of discomfort hour with errors of less than 1.5%. It is also found that the optimal solutions favor the smallest window-to-external surface area with triple-layer low-E windows and insulation thickness of greater than 90 mm. The merit of the developed method is that it can rapidly reach the optimal solutions for most types of building shapes with more than two objective functions and large number of design variables.

关键词： ANN(artificial neural network) exhaustive-listing building shape optimization thermal load thermal comfort

BIAS ERRORS INDUCED BY CONCENTRATION GRADIENT IN SEDIMENT-LADEN FLOW MEASUREMENT WITH PTV

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Journal of Hydrodynamics 2012年第5期24卷 668-674页

作者： LI Dan-xun lin Qiu-sheng ZHONG Qiang WANG Xing-kui State Key Laboratory of Hydroscience and Engineering Tsinghua UniversityBeijing 100084China

Sediment-laden flow measurement with Particle Tracking Velocimetry （PTV） introduces a series of finite-sized sampling bins along the vertical of the flow. Instantaneous velocities are collected at each bin and a significantly large sample is established to evaluate mean and root mean square （rms） velocities of the flow. Due to the presence of concentration gradient, the established sample for the solid phase involves more data from the lower part of the sampling bin than from the upper part. The concentration effect causes bias errors in the measured mean and rms velocities when velocity varies across the bin. These bias errors are analyti- cally quantified in this study based on simplified linear velocity and concentration distributions. Typical bulk flow characteristics from sediment-laden flow measurements are used to demonstrate rough estimation of the error magnitude. Results indicate that the mean velocity is underestimated while the rms velocity is overestimated in the ensemble-averaged measurement. The extent of devia- tion is commensurate with the bin size and the rate of concentration gradient. Procedures are proposed to assist determining an appro- priate sampling bin size in certain error limits.

关键词： bias error velocity concentration gradient