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Global Well-posedness for the Non-viscous MHD Equations with Magnetic Diffusion in Critical Besov Spaces

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Acta Mathematica Sinica,English Series 2022年第9期38卷 1493-1511页

作者： wei kui YE Zhao Yang YIN Institute of Applied Physics and Computational Mathematics P.O.Box 8009Beijing 100088P.R.China Department of Mathematics Sun Yat-sen UniversityGuangzhou 510275P.R.China

In this paper,we mainly investigate the Cauchy problem of the non-viscous MHD equations with magnetic *** first establish the local well-posedness(existence,uniqueness and continuous dependence)with initial data(u_(0),b_(0))in critical Besov spaces B_(p,1)^(d/p+1)×B_(p,1)^(d/p)with 1≤p≤∞,and give a lifespan T of the solution which depends on the norm of the Littlewood–Paley decomposition(profile)of the initial ***,we prove the global existence in critical Besov *** particular,the results of global existence also hold in Sobolev space C([0,∞);H~s(S~2))×(C([0,∞);H^(s-1)(S~2))∩L~2([0,∞);H~s(S~2)))with s>2,when the initial data satisfies∫_(S~2)b_(0)dx=0 and||u_(0)||B_(()∞,1~((S~2)))~1+||b_(0)||B_(()∞,1^(S~2))~0≤ε.It’s worth noting that our results imply some large and low regularity initial data for the global existence.

关键词： The non-viscous MHD equations with magnetic diffusion local well-posedness critical Besov spaces global existence

Simultaneous electrochemical DNA hybridization assay for PAT and FMV 35S gene sequence using quantum dots as labels

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Chinese Chemical Letters 2008年第10期19卷 1244-1247页

作者： Jiang Hua Zhong Peng Qin wei Sun kui Jiao College of Chemistry and Molecular Engineering Key Laboratory of Eco-Chemical Engineering of Ministry of Education Qingdao University of Science and Technology Qingdao 266042 China

An electrochemical method for the simultaneous detection of two different DNA sequences from PAT and FMV 35S gene sequence using CdS and PbS quantum dots （QDs） as labels was described. The QDs were readily functionalized with oligonucleotides as electrochemical DNA probes and selectively hybridized to the complementary sequences immobilized on the microplate. The QDs anchored on the hybrids were dissolved in the solution by the oxidation of HNO3 and further detected by a sensitive differential pulse anodic stripping voltammetric method （DPASV）. The DPASV signals of the oxidation of Cd^2＋ and Pb^2＋ ions present in the solution were different and reflected the identity of corresponding ssDNA targets sequences.

关键词： Electrochemical DNA assay Quantum dots Differential pulse anodic stripping voltammetry Microplate Simultaneous detection

Effect of NH_4^+-N/NO_3^--N Ratios on Growth and Some Physiological Parameters of Chinese Cabbage Cultivars

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Pedosphere 2005年第3期15卷 310-318页

作者： CHENwei LUOJin-kui SHENQi-Rong CollegeofResourceandEnvironmentalSciences NanjingAgriculturalUniversityNanjing210095（China）

The responses of three cultivars of Chinese cabbage (Brassica chmensis L.), one of the main vegetable crops in China, to different ratios of NH4+-N/NO3--N was investigated to find the optimal ratio of ammonium to nitrate for maximal growth and to explore ways of decreasing the nitrate content, increasing nitrogen use efficiency of Chinese cabbage, and determining distributions of nitrogen and carbon. Three cultivars of Chinese cabbage were hydroponically grown with three different NH4+-N/NO3--N ratios (0:10…

关键词： BEAN PHASEOLUS-VULGARIS NITRATE ACCUMULATION NITROGEN FORM MAIZE AMMONIUM EXPRESSION TRANSPORT NUTRITION CARBON ROOTS

Synthesis of diethers derived from furoin by phase transfer catalysis under microwave irradiation

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Chinese Chemical Letters 2007年第7期18卷 791-794页

作者： Feng Zhang Ya Zhuo Li Da wei Gao Ji kui Sun Yu Min Zhang College of Chemistry Jilin University Changchun Jilin 130012 China

A series of new diethers were obtained by alkylation of furoin under microwave irradiation （MWI） in phase transfer catalysis （PTC） conditions. The products of alkyl halides were synthesized in good yields （〉75%） within a few minutes, and the products of dihalides were synthesized in fair yields （about 45%）. The yields are dramatically improved compared to conventional heating under the same conditions, in spite of similar profiles of rising in temperature.

关键词： Microwave irradiation Furoin Phase transfer catalysis O-Alkylation

Degradation of current–voltage and low frequency noise characteristics under negative bias illumination stress in InZnO thin film transistors

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Chinese Physics B 2018年第6期27卷 524-530页

作者： Li Wang Yuan Liu kui-wei Geng Ya-Yi Chen Yun-Fei En School of Electronic and Information Engineering South China University of TechnologyGuangzhou 510640China Science and Technology on Reliability Physics and Application of Electronic Component Laboratory CEPREIGuangzhou 510610China Key Laboratory of Silicon Device Technology Chinese Academy of SciencesBeijing 100029China

The instabilities of indium–zinc oxide thin film transistors under bias and/or illumination stress are studied in this paper. Firstly, illumination experiments are performed, which indicates the variations of current–voltage characteristics and electrical parameters（such as threshold voltage and sub-threshold swing） are dominated by the stress-induced ionized oxygen vacancies and acceptor-like states. The dependence of degradation on light wavelength is also investigated. More negative shift of threshold voltage and greater sub-threshold swing are observed with the decrease of light ***, a negative bias illumination stress experiment is carried out. The degradation of the device is aggravated due to the decrease of recombination effects between ionized oxygen vacancies and free carriers. Moreover, the contributions of ionized oxygen vacancies and acceptor-like states are separated by using the mid-gap method. In addition, ionized oxygen vacancies are partially recombined at room temperature and fully recombined at high temperature. Finally, low-frequency noise is measured before and after negative bias illumination stress. Experimental results show few variations of the oxide trapped charges are generated during stress, which is consistent with the proposed mechanism.

关键词： indium-zinc oxide thin film transistor illumination low frequency noise

Dietary n-6：n-3 ratio and Vitamin E improve motility characteristics in association with membrane properties of boar spermatozoa

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Asian Journal of Andrology 2017年第2期19卷 223-229页

作者： Qing Liu Yuan-Fei Zhou Run-Jia Duan Hong-kui wei Jian Peng Si-Wen jiang Department of Animal Nutrition and Feed Science College of Animal Science and Technology Huazhong Agricultural University Wuhan 430070 P. R. China The Cooperative Innovation Center for Sustainable Pig Production Wuhan 430070 P. R. China Key Laboratory of Agricultural Animal Genetics Breeding and Reproduction of Ministry of Education and Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture Huazhong Agricultural University Wuhan 430070 E R. China

This study was aimed to evaluate the effects of dietary n-6：n-3 ratio and Vitamin E on the membrane properties and motility characteristics of spermatozoa in boars. Forty Duroc boars were randomly distributed in a 2 × 2 factorial design with two n-6：n-3 ratios （14.4 and 6.6） and two Vitamin E levels （200 and 400 mg kg-1）. During 16 weeks of treatment, fresh semen was collected at weeks O, 8, 12, and 16 for measurements of motility characteristics, contents of fatty acids, membrane properties （membrane fluidity and membrane integrity）, and lipid peroxidation of the spermatozoa. The semen was diluted in Beltsville Thawing Solution （BTS） extender and stored at 17℃, and the sperm motility was assessed at 12, 36, 72, and 120 h of storage. The 6.6 n-6.n-3 dietary ratio increased the contents of n-3 polyunsaturated fatty acids （PUFAs） and docosabexaenoic acid （DHA） and improved the membrane integrity and membrane fluidity of the spermatozoa, resulting in notably increased total motility, sperm progressive motility, and velocity parameters of fresh semen. Feeding diet with Vitamin E （400 mg kg-1） prevented sperm lipid peroxidation, and resulted in higher total motility and sperm progressive motility in fresh and liquid stored semen. In conclusion, the adjustment of n-6.n-3 ratio （6.6） and supply of Vitamin E （400 mg kg-1） successfully improved sperm motility characteristics and thus may be beneficial to the fertility of boars, which might be due to the modification of the physical and functional properties of spermatozoa membrane in response to dietary supplementation.

关键词： boar dietary n-6:n-3 ratio fatty acid composition lipid peroxidation membrane properties motility characteristics Vitamin E

Haptic Modeling and Rendering Based on Neurofuzzy Rules for Surgical Cutting Simulation

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自动化学报 2006年第2期32卷 193-199页

作者： SONG wei-Guo YUAN kui FU Yu-Jin Institute of Automation Chinese Academy of Sciences Beijing 100080

This paper combines image processing with 3D magnetic tracking method to develop a scalpel for haptic simulation in surgical cutting. First, a cutting parameter acquisition setup is presented and the performance is validated from soft tissue cutting. Then, based on the acquired input-output data pairs, a method for fuzzy system modeling is presented, that is, after partitioning each input space equally and giving the premises and the total number of fuzzy rules, the consequent parameters and the fuzzy membership functions (MF) of the input variables are learned and optimized via a neurofuzzy modeling technique. Finally, a haptic scalpel implemented with the established cutting model is described. Preliminary results show the feasibility of the haptic display system for real-time interaction.

关键词：图象处理模糊神经网络切割模拟触觉显示

Effects of Cu contamination on the electrical properties of multicrystalline silicon purified by directional solidification route

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Effects of Cu contamination on the electrical properties of ...

Resistance Training to Failure Induce Higher Level of Fatigue and Delayed Recovery

2014中国功能材料科技与产业高层论坛

作者： Li Jiao Chen Xiu-hua Ma Wen-hui Zhang Cong wei kui-xian Faculty of Physical Science and Technology Yunnan University The National Engineering Laboratory for Vacuum Metallurgy Faculty of Metallurgical and Energy EngineeringKunming University of Science and Technology

ISBN: (纸本)9783038353522

The multicrystalline silicon wafers purified by directional solidification route were used to introduce copper *** resistivity and minority carrier lifetime of multicrystalline silicon wafers were investigated by four-point probe resistivity tester andμ-PCD,*** temperature,atmosphere and cooling rate were *** was found that copper contaminants have a greater impact on the electrical properties of multicrystalline *** results showed that copper impurities tend to exist at defect sites at high temperature,and high annealing temperature,argon atmosphere and slow cooling conditions make more impact on the electrical properties of multicrystalline silicon than low annealing temperature,air atmosphere and fast cooling.

关键词： multicrystalline silicon Copper contamination minority carrier lifetime resistivity

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Resistance Training to Failure Induce Higher Level of Fatigu...