检索结果-南通市图书馆

A Note on "Doubly Periodic Propagating Wave for (2+1)-Dimensional Breaking Soliton Equation"

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2009年第1期51卷 79-80页

作者： zhenG Chun-Long pan zhen-huan MA zheng-Yi School of Physics and Mechanical Engineering Shaoguan University Shaoguan 512005 China College of Mathematics and Physics Lishui University Lishui Zhejiang 323000 China Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China

In a recent paper [Commun. Theor. Phys. （Beijing, China） 49 （2008） 268], huang et al. gave a general variable separation solution to the （2＋1）-dimensional breaking soliton equation via a special Biicldund transformation and the variable separation approach. In terms of the derived variable separation solution and by introducing Jacobi elliptic functions, they claimed that nonelastic types of interaction between Jacobi elliptic function waves are investigated both analytically and graphically. We show that some inappropriateness or errors exist in their paper, and say nothing of the conclusion that some nonelastic types of interaction between Jacobi elliptic function waves in the （2＋1）-dimensional breaking soliton equation have been found.

关键词： breaking soliton equation variable separation solution interaction comment

Insufficient MIRO1 contributes to declined oocyte quality during reproductive aging

在线全文

学校读者我要写书评

暂无评论

Science China Life Sciences 2025年

作者： zhen-Nan pan Hao-Lin Zhang Kun-huan Zhang Jia-Qian Ju Jing-Cai Liu Shao-Chen Sun College of Animal Science and Technology Nanjing Agricultural University Reproductive Medicine Centre The Affiliated Yantai Yuhuangding Hospital of Qingdao University

Mitochondrial Rho-GTPase 1 (MIRO1) is an outer mitochondrial membrane protein which regulates mitochondrial transport and mitophagy in mitosis. In present study, we reported the crucial roles of MIRO1 in mammalian oocyte meiosis and its potential relationship with aging. We found that MIRO1 expressed in mouse and porcine oocytes, and its expression decreased in aged mice. MIRO1 deficiency caused the failure of meiotic resumption and polar body extrusion in both mouse and porcine oocytes, which could be rescued by exogenous MIRO1supplementation. Mass spectrometry data indicated that MIRO1 associated with several cytoskeleton and cell cycle-related proteins, and MIRO1 regulated motor protein Dynein for microtubule-organizing centers (MTOCs) dynamics at germinal vesicle (GV) stage, which determined meiotic resumption. Furthermore, we found that MIRO1 regulated Aurora A and kinesin family member 11 (KIF11) for meiotic spindle assembly in oocytes. Besides, MIRO1 associated with several mitochondria-related proteins dynamic-related protein 1 (DRP1),Parkin and lysosomal-associated membrane protein 2 (LAMP2) for mitochondrial dynamics and mitophagy during oocyte meiosis. Taken together, our results suggested that MIRO1 played pivotal roles in meiotic resumption, spindle assembly and mitochondrial function in mouse and porcine oocytes, and its insufficiency might contribute to the oocyte maturation defects during aging.

关键词：

1株鸡源神经型大肠埃希氏菌的分离及特性分析

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中国兽医学报 2000年第1期20卷 27-30页

作者：恽时锋潘震寰江苏南京军区南京总医院动物实验科

从某鸡声以瘫痪、歪颈、昏睡为主要症状的肉雏鸡脑实质中，分离到１株革兰氏阴性、有动力的短杆菌，定名为ＬＣＢ。其主要生化特性为氧化酶阴性、接触酶阳性，发酵葡萄糖、甘露醇，产酸产气，了酵乳糖、山梨醇，不发酵蔗糖、卫茅醇、肌... 详细信息

从某鸡声以瘫痪、歪颈、昏睡为主要症状的肉雏鸡脑实质中，分离到１株革兰氏阴性、有动力的短杆菌，定名为ＬＣＢ。其主要生化特性为氧化酶阴性、接触酶阳性，发酵葡萄糖、甘露醇，产酸产气，了酵乳糖、山梨醇，不发酵蔗糖、卫茅醇、肌醇，不产生硫化氯，不液化明胶，不分解尿素，Ｍ－Ｒ阳性，Ｖ－Ｐ阴性。经鉴定为大肠埃希氏菌，血清型属Ｏ１３１，为国内外新发现的鸡大肠埃希氏菌的血清型。该菌株腹腔接种对ＫＭ小鼠具有高致病性，

关键词：神经型大肠埃希氏菌血清型生物学特性分离

Dual modulation of homogeneous nanomaterialization and electrochemical activation enhancing zinc ion storage

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2025年第01期 385-393页

作者： Jianwei Wang huan Wang Kangning Wang Wenhui Wang Wenlin Zhang Yanzhong zhen School of Chemistry & Chemical Engineering Yan'an University

Vanadium-based electrode materials are widely investigated,but the low specific capacity and slow electrochemical kinetics in aqueous zinc-ion batteries still limit their commercial ***,the VS2/Ca V4O9material with the morphology of nanoflower was synthesized by a one-step hydrothermal *** to the blocky structure of pure VS2material,the VS2/Ca V4O9material is composed of thinner homogeneous *** open structures could provide abundant electrochemical active sites and ion transport channels,and then promote the electrochemical reaction *** addition,they can also buffer the bulk strain during the reaction *** improve the utilization of vanadium elements,an in-situ electrochemical activation strategy is used to explore the storage performance of the VS2/Ca V4O9material,the different activation voltage range of 0.4–1.6 and 0.4–1.4 V are selected,*** with the longer activation plateau of activated-VS2,the VS2/Ca V4O9cathode could quickly reach the activation state in the range of 1.4–1.6 V and cause the release of additional Zn storage sites *** VS2/Ca V4O9cathode delivers a higher power density of 37,000 W kg-1and a significant energy density of 423 Wh *** the high current density of 15 A g-1,the VS2/Ca V4O9cathode still has a discharge capacity of 183.9m Ah g-1after 5,000 cycles,and the capacity decay rate per cycle is only 0.0042%.Continuous cyclic voltammetry （CV） curves,electrochemical impedance spectroscopy （EIS） measurements,density functional theory （DFT） calculation and galvanostatic intermittent titration technique （GITT） measurements demonstrate that the VS2/Ca V4O9cathode has a faster ion diffusion/charge transfer ***,the assembled flexible device has an excellent mechanical stability.

关键词：

同方期刊数据库

Design of a terahertz slotted waveguide array antenna based on photonic crystal

在线全文

学校读者我要写书评

暂无评论

Optoelectronics Letters 2025年

作者： pan Wu YE Kuan ZHANG zhen LI Renpu QIU Sen huanG Lei College of Photoelectronic Engineering， Chongqing University of Posts and Telecommunications Chongqing Municipal Key Laboratory of Photoelectric Information Sensing and Transmission Technology， Chongqing University of Posts and Telecommunications Laboratory of Quantum Information Technology， Chongqing University of Posts and Telecommunications

In this paper， a terahertz slotted waveguide array antenna is designed based on photonic crystal， which can realize efficient radiation of terahertz waves. The electromagnetic wave is fed from the rectangular waveguide at the bottom of the antenna， coupled to photonic crystal waveguide through photonic crystal cavity， and radiated outward through slots at the top layer of antenna. The simulation results show that the antenna achieves a peak gain of 13.45dBi at 360 GHz， a half-power beamwidth of 10.9o， and a side lobe level of -13.9dB. The antenna based on photonic crystal has the advantages of low profile， low loss， and high radiation efficiency， which can be applied to terahertz wireless communication systems.

关键词：

Rh2O3/hexagonal CePO4 nanocatalysts for N2O decomposition

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2017年第4期11卷 586-593页

作者： Liu, huan Ma, zhen Fudan Univ Dept Environm Sci & Engn Shanghai Key Lab Atmospher Particle Pollut & Prev Shanghai 200433 Peoples R China

Hexagonal CePO4 nanorods were prepared by a precipitation method and hexagonal CePO4 nanowires were prepared by hydrothermal synthesis at 150 ℃. Rh （NO3）3 was then used as a precursor for the impregnation of Rh203 onto these CePO4 materials. The Rh203 supported on the CePO4 nanowires was much more active for the catalytic decomposition of N20 than the RhzO3 supported on CePO4 nanorods. The stability of both catalysts as a function of time on stream was studied and the influence of the co-feed （CO2, O2, H20 or O2/H20） on the N20 decomposition was also investigated. The samples were characterized by N2 adsorption-desorption, induc- tively coupled plasma optical emission spectroscopy, X- ray diffraction, transmission electron microscopy, X-ray photoelectron microscopy, hydrogen temperature-pro- grammed reduction, oxygen temperature-programmed desorption, and CO2 temperature-programmed desorption in order to correlate the physicochemical and catalytic properties.

关键词： Rh2O3 CePO4 N2O decomposition

Rh_2O_3/monoclinic CePO_4 composite catalysts for N_2O decomposition and CO oxidation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2018年第1期26卷 109-115页

作者： huan Liu zhen Ma Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Department of Environmental Science and EngineeringFudan University

CePO4 （in particular, monoclinic CePO4） has been rarely used to make supported catalysts. Herein, monoclinic CeP04 nanoparticles were prepared by calcining hexagonal CePO4 nanomds （prepared by precipitation） in air at 900 ℃. Monoclinic CePO4 nanowires were prepared by calcining hexagonal CePO4 nanowires （prepared by hydrothermal synthesis at 150 ℃） in air at 900 ℃. Both monoclinic CePO4 materials were used to support Rh2O3 by impregnation using Rh（NO3）3 as a precursor （followed by calcination）. The catalytic performance of Rh2O3/monoclinic CePO4 composite materials in N2O decomposition and CO oxidation was investigated. It was found that Rh2O3 supported on monoclinic CePO4 nanowims was much more active than Rh2O3 supported on monoclinic CePO4 nanoparticles. The stability of catalysts as a function of reaction time on stream was studied in both reactions. The influence of co-fed CO2, O2, and H2O on the catalytic activity in N20 decomposition was also studied. These catalysts were characterized by employing N2 adsorption-desorption, ICP-OES, XRD, TEM, XPS, H2-TPR, O2-TPD, and CO2-TPD. The correlation between physicochemical properties and catalytic properties was discussed.

关键词： Rh2O3 CePO4 N2O decomposition CO oxidation Catalyst

AN EXpanDED CHARACTERISTIC-MIXED FINITE ELEMENT METHOD FOR A CONVECTION-DOMINATED TRANSPORT PROBLEM

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2005年第5期23卷 479-490页

作者： Ling Guo huan-zhen Chen Department of Mathematics Shanghai Jiao Tong UniversityShanghai 200030China Department of Mathematics Shandong Normal UniversityJinan 250014China

In this paper, we propose an Expanded Characteristic-mixed Finite Element Method for approximating the solution to a convection dominated transport problem. The method is a combination of characteristic approximation to handle the convection part in time and an expanded mixed finite element spatial approximation to deal with the diffusion part. The scheme is stable since fluid is transported along the approximate characteristics on the discrete level. At the same time it expands the standard mixed finite element method in the sense that three variables are explicitly treated： the scalar unknown, its gradient, and its flux. Our analysis shows the method approximates the scalar unknown, its gradient, and its flux optimally and simultaneously. We also show this scheme has much smaller time-truncation errors than those of standard methods. A numerical example is presented to show that the scheme is of high performance.

关键词： Convection diffusion problems Expanded characteristic mixed finite elementmethod Optimal error estimates Numerical test

A phase-selective,bis-urea organogelator with a curved bis-naphthalene core

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2017年第4期28卷 782-786页

作者： huan Yao Liu-pan Yang zhen-feng He Jia-Rong Li Wei Jiang School of Chemical Engineering and Environment Beijing Institute of Technology Department of Chemistry South University of Science and Technology of China Dalian Institute of Chemical Physics Chinese Academy of Science School of Chemical Engineering and Environment North University of China

A phase-selective,bis-urea organogelator with a curved bis-naphthalene core was synthesized and *** gelator is capable of gelating a variety of hydrocarbons and *** resulting gels have been characterized by rheology,SEM,and molecular *** gelator can be applied in the powder form for the recovery of a thin layer of petrol oil spill in water.

关键词： Organogelator Phase-selective Bis-naphthalene Supramolecular gel Oil spill recovery