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Microstructures and Optical Properties of Sol-Gel Derived TiO_2 Anatase Thin Films

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Wuhan University Journal of Natural Sciences 1999年第2期4卷 48-51页

作者： Liu, zhong-chi Zou, Hua-min zhong, jia-cheng Wang, Da-hai Wuhan Univ Wuhan China

TiO 2 anatase thin films on quartz substrates were prepared with sol gel method. The dry gel films, made by spin coating 10 times, were calcined at various temperatures. From X ray diffraction analyses, it is found that the anatase to rutile phase transformation temperature of the films is higher than 850 ℃, the films are preferentially oriented on (0 0 1) plane, i.e. c axis oriented. The thickness, refractive indexes, absorption coefficients and extinction coefficients of the films were determined from UV Vis transmission spectra of the films using a UV Vis spectrophotometer. The thickness of the films is about 570 nm. The refractive indexes, absorption coefficients and the extinction coefficients of the present films are larger than the values of anatase films prepared by sputtering. This indicates that the films made with sol gel method are very dense.

关键词： titanium dioxide anatase thin film

An Innovative Coupled Common-Node Discrete Element Method-Smoothed Particle Hydrodynamics Model Developed with LS-DYNA and Its Applications

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China Ocean Engineering 2024年第3期38卷 467-482页

作者： SHEN zhong-xiang WANG Wen-qing XU cheng-yue LUO jia-xin LIU Ren-wei School of Naval Architecture and Ocean Engineering Jiangsu University of Science and TechnologyZhenjiang 212100China College of Harbor Coastal and Offshore EngineeringHohai UniversityNanjing 210098China

In this study,a common-node DEM-SPH coupling model based on the shared node method is proposed,and a fluid–structure coupling method using the common-node discrete element method-smoothed particle hydrodynamics(DS-SPH)method is developed using LS-DYNA *** DEM and SPH are established on the same node to create common-node DEM-SPH particles,allowing for fluid–structure *** simulations of various scenarios,including water entry of a rigid sphere,dam-break propagation over wet beds,impact on an ice plate floating on water and ice accumulation on offshore structures,are *** interaction between DS particles and SPH fluid and the crack generation mechanism and expansion characteristics of the ice plate under the interaction of structure and fluid are also *** results are compared with available data to verify the proposed coupling ***,the simulation results demonstrated that controlling the cutoff pressure of internal SPH particles could effectively control particle splashing during ice crushing failure.

关键词： common-node DEM-SPH fluid-structure interaction discrete element method smoothed particle hydrodynamics

Triple reverse order law for the Drazin inverse

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Applied Mathematics(A Journal of Chinese Universities) 2024年第1期39卷 55-68页

作者： WANG Hua zhong cheng-cheng College of Sciences Inner Mongolia University of TechnologyHohhot 010051China College of Engineering University of Jinan Quancheng CollegeYantai 265600China

In this paper,we investigate the reverse order law for Drazin inverse of three bound-ed linear operators under some commutation ***,the Drazin invertibility of sum is also obtained for two bounded linear operators and... 详细信息

关键词： Drazin inverse reverse order law space decomposition

广东鹅源多杀性巴氏杆菌的分离鉴定、耐药表型和耐药基因的检测及相关性分析

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中国预防兽医学报 2024年第2期46卷 121-127页

作者：苏文楠杨智灿张美琳钟嘉诚陈亦杏陈济铛张溢珊张济培佛山科学技术学院广东佛山528225 佛山天牧生物科技有限公司广东佛山528225

为了解广东地区鹅源多杀性巴氏杆菌(Pm)的流行情况、药物敏感性、耐药基因的携带情况以及耐药表型与耐药基因的相关性,本实验对2019年~2022年从广东地区采集的193份疑似感染Pm病鹅的心脏血液和肝脏组织划线接种于不同的培养基分离细菌,... 详细信息

为了解广东地区鹅源多杀性巴氏杆菌(Pm)的流行情况、药物敏感性、耐药基因的携带情况以及耐药表型与耐药基因的相关性,本实验对2019年~2022年从广东地区采集的193份疑似感染Pm病鹅的心脏血液和肝脏组织划线接种于不同的培养基分离细菌,对分离菌纯化后采用PCR扩增分离菌的KMT1基因并测序,采用多重PCR扩增分离菌的5个荚膜基因及8个脂多糖基因,分析分离菌的荚膜分型与脂多糖(LPS)分型。结果显示分离到83株鹅源Pm,其中82株为荚膜A型,1株无法通过荚膜定型;LPS分型为L1型。采用K-B纸片扩散法检测分离菌的药物敏感性;通过PCR检测分离菌7类药物的15种耐药基因,包括β-内酰胺类(bla_(CTX-M)、bla_(TEM)、bla_(OXA))、氨基糖苷类(aadA1、aph(3’)Ila)、喹诺酮类(qnrA、qnrB、qnrS)、酰胺醇类(floR)、四环素类(tetM、tetX)、大环内酯类(ermF、ereD)、磺胺类(sul1、sul3)耐药基因。采用统计学软件SPSS22中的完全随机设计两样本率的卡方检验分析分离菌的耐药表型和相应耐药基因的相关性。药敏试验结果显示,83株鹅源Pm对多种药物敏感性较高,其中对喹诺酮类的环丙沙星和氧氟沙星、氨基糖苷类的丁胺卡那和大观霉素、β-内酰胺类的头孢曲松、磺胺类的复方新诺明、大环内酯类的阿奇霉素敏感的菌株占比均在63%以上;对氨基糖苷类的链霉素和卡那霉素耐药的菌株占比高于50%,对氨基糖苷类的新霉素和四环素类的四环素耐药的菌株分别占49.40%(41/83)和46.99%(39/83)。耐药基因的检测结果显示,分离菌检出耐药基因qnrB、sul3、blaTEM、aadA1、aph(3’)Ila、ereD、ermF、tetM、floR,检出率分别为9.63%(8/94)、27.71%(23/83)、28.92%(24/83)、48.19%(40/83)、14.46%(12/83)、49.40%(41/83)、3.61%(3/83)、1.20%(1/83)、32.53%(27/83),未检出耐药基因qnrA、qnrS、sul1、tetX、bla_(CTX-M)、bla_(OXA)。相关性分析结果显示,aadA1基因与Pm对新霉素、链霉素、卡那霉素、大观霉素的耐药性具有极显著的相关性(P<0.001);bla_(CTX-M)基因、floR基因分别与Pm对头孢拉定、氟苯尼考的耐药性具有显著相关性(P<0.05)。上述结果表明,广东地区鹅源Pm主要为A∶L1基因型,对多种药物敏感,耐药基因携带率不高,部分药物的耐药表型与耐药基因具有相关性。本研究为广东地区鹅源Pm病的监测和防治提供参考依据,为Pm耐药机制的研究奠定基础。

关键词：多杀性巴氏杆菌药物敏感性试验耐药基因

A 1-bp deletion in the MC04g1399 is highly associated with failure to produce fruit wart in bitter gourd

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Horticultural Plant Journal 2024年第1期10卷 171-180页

作者： jia Liu Junjie Cui Jichi Dong jian zhong Chunfeng zhong Fanchong Yuan Wendong Guan Fang Hu jiaowen cheng Kailin Hu College of Horticulture South China Agricultural UniversityGuangzhouGuangdong 510642China Key Laboratory of Biology and Genetic Improvement of Horticultural Crops(South China) Ministry of Agriculture and Rural AffairsGuangzhouGuangdong 510642China Guangdong Vegetables Engineering Research Center GuangzhouGuangdong 510642China Department of Horticulture Foshan UniversityFoshanGuangdong 528225China Henry Fok School of Biology and Agricultural Shaoguan UniversityShaoguanGuangdong 512023China

Fruit wart is an important appearance trait influencing consumer preferences of bitter gourd(Momordica charantia L.).The molecular genetic mechanisms underlying fruit wart formation in bitter gourd are largely *** this study,genetic analysis based on four generations showed that fruit wart formation in bitter gourd was controlled by a single dominant locus named as *** Fwa locus was initially mapped into a 4.82 Mb region on pseudochromosome 4 by BSA-seq analysis and subsequently narrowed down to a 286.30 kb region by linkage analysis.A large F2population consisting of 2360 individuals was used to screen recombinants,and the Fwa locus was finally fine mapped into a 22.70 kb region harboring four protein-coding genes through recombination ***04g1399,encoding an epidermal patterning factor 2-like protein,was proposed as the best candidate gene for Fwa via sequence variation and expression *** addition,a 1-bp insertion and deletion(InDel)variation within MC04g1399 was converted to a cleaved amplified polymorphic sequence(CAPS)marker that could precisely distinguish between the warty and non-warty types with an accuracy rate of 100%among a wide panel of 126 bitter gourd germplasm *** results not only provide a scientific basis for deciphering the molecular mechanisms underlying fruit wart formation but also provide a powerful tool for efficient genetic improvement of fruit wart via marker-assisted selection.

关键词： Bitter gourd Fruit wart Bulk segregant analysis Fine-mapping Candidate gene

Market Equilibrium Based on Cloud-edge Collaboration

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 96-104页

作者： Tong cheng Haiwang zhong Qing Xia the State Key Laboratory of Power Systems the Department of Electrical EngineeringTsinghua UniversityBeijing 100084China

Market participants can only bid with lagged information disclosure under the existing market mechanism,which can lead to information asymmetry and irrational market behavior,thus influencing market *** promote rational bidding behavior of market participants and improve market efficiency,a novel electricity market mechanism based on cloudedge collaboration is proposed in this *** market information,called residual demand curve,is published to market participants in real-time on the cloud side,while participants on the edge side are allowed to adjust their bids according to the information disclosure prior to closure *** proposed mechanism can encourage rational bids in an incentive-compatible way through the process of dynamic equilibrium while protecting participants’*** paper further formulates the mathematical model of market equilibrium to simulate the process of each market participant’s strategic bidding behavior towards equilibrium.A case study based on the IEEE 30-bus system shows the proposed market mechanism can effectively guide bidding behavior of market participants,while condensing exchanged information and protecting privacy of participants.

关键词： Cloud-edge collaboration market mechanism residual demand curve strategic bidding

Numerical analysis of the correlation between fluid dynamic modes and hydrodynamic noise in flows around a three-dimensional circular cylinder

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Journal of Hydrodynamics 2024年第1期36卷 119-129页

作者： jia-jia Qin Ming-xin Zou Yuan Zhuang De-cheng Wan Computational Marine Hydrodynamics Lab(CMHL) School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China Wuhan Second Ship Design and Research Institute Wuhan430205China

The flow around a circular cylinder for Re=1000 is characterized by flow separation and Karman vortex *** typical flow features can be captured to study the correlation between fluid fields and sound *** this paper,the three-dimensional circular cylinder is taken as the research object,and the probes of surface fluctuating pressure and far field sound pressure are arranged every 10°.The directional diagram and the coherence of fluctuating pressure and sound pressure are *** relationship between the flow mode and hydrodynamic noise is studied by using dynamic mode decomposition(DMD).The characteristics of the dipole and quadrupole sound source term of a long span cylinder are *** results show that at the angles between 30°–120°and 190°–350°,the fluctuating pressure contributes more to the generation of dipole *** quadrupole sound source shows three-dimensional effects,which is more obvious in a cylinder with large spanwise length.

关键词： Pressure coherence dynamic mode decomposition flow-sound correlation circular cylinder

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均分散球形TiO_2制备中的若干影响因素

武汉大学学报（自然科学版） 2001年第2期47卷 185-188页

作者：昝菱刘忠士钟家柽武汉大学化学与分子科学学院湖北武汉430072

介绍了用盐水解制备超细均分散球形 Ti O2 的方法 ,详细讨论了浓度、酸度、阴离子、陈化时间、锻烧温度等因素对制备超细球形 Ti O2 的影响 ,用透射电镜和粒度分析仪分析了 Ti O2 的粒度和形貌 ,得到了均匀分散性好 ,金红石型结构 ,2μ... 详细信息

介绍了用盐水解制备超细均分散球形 Ti O2 的方法 ,详细讨论了浓度、酸度、阴离子、陈化时间、锻烧温度等因素对制备超细球形 Ti O2 的影响 ,用透射电镜和粒度分析仪分析了 Ti O2 的粒度和形貌 ,得到了均匀分散性好 ,金红石型结构 ,2μm左右的球形 Ti O2 .

关键词：二氧化钛分散球形粒子水解法制备超细粉体材料均匀分散性陈化时间

In vivo label-free measurement of blood flow velocity symmetry based on dual line scanning third-harmonic generation microscopy excited at the 1700 nm window

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Journal of Innovative Optical Health Sciences 2024年第1期17卷 61-68页

作者： Hui cheng Jincheng zhong Ping Qiu Ke Wang Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen 518060 P.R.China

Measurement of bloodflow velocity is key to understanding physiology and pathology in *** most measurements are performed at the middle of the blood vessel,little research has been done on characterizing the instantaneous bloodflow velocity *** is mainly due to the lack of measurement technology with high spatial and temporal ***,we tackle this problem with our recently developed dual-wavelength line-scan third-harmonic generation(THG)imaging *** acquisition of dual-wavelength THG line-scanning signals enables measurement of bloodflow velocities at two radially symmetric positions in both venules and arterioles in mouse brain in *** results clearly show that the instantaneous bloodflow velocity is not symmetric under general conditions.

关键词： 1700 nm-Window third-harmonic generation imaging blood flow velocity