检索结果-南通市图书馆

Effect of Morphology of Instantaneous Inoculant on Inoculated Result of Melted Iron

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2003年第4期10卷 38-41页

作者： sheng da Tsinghua University

The characteristics of some elements in inoculant were *** effect of the morphology of instantaneous inoculant on its melting velocity was *** the inoculants pass through the same sieve number,the volume and the ratio of surface area to volume are *** is evident from the theoretical analysis and experiment under some conditions that the melting velocity of inoculant depends on the morphology of *** morphology of inoculant during production should be controlled carefully.

关键词： instantaneous inoculant morphology melting velocity melted iron

Kinetic Factors for Intensive Reaction of Magnesium-Based Spheroidiser in Hot Metal

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2005年第1期12卷 9-11页

作者： sheng da Tsinghua University

The spheroidiser is a necessary additive to manufacture ductile *** with the same hot metal,spheroidisers and treated technology,reactions differ greatly from each *** reaction may be quite normal in one case,but very intensive for another *** effects of kinetic factors such as size,surface area and morphology o f spheroidiser on the reaction of spheoidization are studied.

关键词： hot metal kinetic factor diffusion rate intensive reaction spheroidiser magnesium

One-Way Quantum Computation with Cluster State and Probabilistic Gate

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2013年第1期30卷 13-16页

作者： DIAO da-sheng School of Science Shandong University of Science and TechnologyQingdao 266510

We present a scheme for efficiently constructing a two-dimensional cluster state,which serves as the central physical resource for one-way quantum *** this scheme,we successfully make the required computational overhe... 详细信息

关键词： computation. quantum scheme

Coupling analysis of transcutaneous energy transfer coils with planar sandwich structure for a novel artificial anal sphincter

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

Journal of Zhejiang University-Science C(Computers and Electronics) 2014年第11期15卷 1021-1034页

作者： Lei KE Guo-zheng YAN sheng YAN Zhi-wu WANG da-sheng LIU Institute of Medical Precision Engineering and Intelligent Systems School of Electronic Information and Electrical EngineeringShanghai Jiao Tong University

This paper presents a set of analytical expressions used to determine the coupling coefficient between primary and secondary Litz-wire planar coils used in a transcutaneous energy transfer(TET) system. A TET system has been designed to power a novel elastic scaling artificial anal sphincter system(ES-AASS) for treating severe fecal incontinence(FI), a condition that would benefit from an optimized TET. Expressions that describe the geometrical dimension dependence of self- and mutual inductances of planar coils on a ferrite substrate are provided. The effects of ferrite substrate conductivity, relative permeability, and geometrical dimensions are also considered. To verify these expressions, mutual coupling between planar coils is computed by 3D finite element analysis(FEA), and the proposed expressions show good agreement with numerical results. Different types of planar coils are fabricated with or without ferrite substrate. Measured results for each of the cases are compared with theoretical predictions and FEA solutions. The theoretical results and FEA results are in good agreement with the experimental data.

关键词： Transcutaneous energy transfer Planar spiral inductance Mutual inductance Coupling coefficient Artificial anal sphincter Fecal incontinence

Attaining synergetic equilibrium of electrical conductivity and tensile strength in GQDs@GN/Cu composites through multi-scale intragranular and intergranular reinforcements

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2024年第1期43卷 366-379页

作者： Shuang-Yin Zhang Liang Liu Rui Bao Jian-Hong Yi sheng-da Guo Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China Key Laboratory of Advanced Materials of Yunnan Province Kunming University of Science and TechnologyKunming 650093China Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou 341000China

The configuration and quality of reinforcements, as well as the robustness of interfacial bonding,holding a critical significance in determining the concurrence between electrical conductivity and mechanical strength in metal matrix composites. In this study, citric acid was employed as the precursor for synthesizing multiscale carbon nanomaterials(graphene quantum dots and graphene, abbreviated as GQDs and GN). The GQDs@GN/Cu composites were fabricated through a segmented ball milling process in conjunction with subsequent spark plasma sintering(SPS). The intragranular GQDs and intergranular GQDs@GN had synergistically reinforced Cu composites through Orowan strengthening, load transfer strengthening and refinement strengthening. Furthermore,the robust interface bonding between GQDs@GN and Cu effectively mitigated interfacial impedance stemming from electron-boundary scattering. The yield strength and ultimate tensile strength of the GQDs@GN/Cu composites were recorded as 270 and 314 MPa, respectively, representing an improvement of 92 and 28% over pure Cu, while maintaining electrical conductivity at a level comparable to that of pure Cu. This study advances the understanding of the possibility of realizing a synergistic compatibility between electrical conductivity and mechanical strength in Cu composites.

关键词： Cu matrix composites Interface bonding Mechanical property Graphene quantum dots(GQDs) Electrical conductivity

Microphase Separation of Semiflexible Ring Diblock Copolymers

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2024年第2期42卷 267-276,I0011页

作者： dan-Yan Qin sheng-da Zhao Zhi-Xin Liu Jing Zhang Xing-Hua Zhang School of Physical Science and Engineering Beijing Jiaotong UniversityBeijing100044China

Aiming at the difficult problem of solving the conformation statistics of complex polymers, this study presents a novel and concise conformation statistics theoretical approach based on Monte Carlo and Neural Network method. This method offers a new research idea for investigating the conformation statistics of complex polymers, characterized by its simplicity and practicality. It can be applied to more complex topological structure, more higher degree of freedom polymer systems with higher dimensions, theory research on dynamic self-consistent field theory and polymer field theory, as well as the analysis of scattering experimental data. The conformation statistics of complex polymers determine the structure and response properties of the system. Using the new method proposed in this study, taking the semiflexible ring diblock copolymer as an example, Monte Carlo simulation is used to sample this ring conformation to construct the dataset of polymer. The structure factor describing conformation statistics are expressed as continuous functions of structure parameters by neural network supervised learning. This is the innovation of this work. As an application, the structure factors represented by neural networks were introduced into the random phase approximation theory to study the microphase separation of semiflexible ring diblock copolymers. The influence of the ring's topological properties on the phase transition behavior was pointed out.

关键词： Ring copolymer Diblock copolymers Semiflexible The order-disorder transition

Impact of pre-oxidation on the formation of byproducts in algae-laden water disinfection:Insights from fluorescent and molecular weight

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2022年第7期34卷 21-27页

作者： da sheng Lingjun Bu Shumin Zhu Yangtao Wu Jue Wang Nan Li Shiqing Zhou Key Laboratory of Building Safety and Energy Efficiency Ministry of EducationDepartment of Water Engineering and ScienceCollege of Civil EngineeringHunan UniversityChangsha 410082China

Pre-oxidation has been reported to be an effective way to remove algal cells in water, but the released algal organic matter (AOM) could be oxidized and lead to the increment in disinfection by-product (DBP) formation. The relationship between pre-oxidation and AOM-derived DBP formation needs to be approached more precisely. This study compared the impact of four pre-oxidants, ozone (O), chlorine dioxide (ClO), potassium permanganate(KMnO) and sodium hypochlorite (NaClO), on the formation of nitrogenous (N-) and carbonaceous (C-) DBPs in AOM chlorination. The characterization (fluorescent properties,molecular weight distribution and amino acids concentration) on AOM samples showed that the characterization properties variations after pre-oxidation were highly dependent on the oxidizing ability of oxidants. The disinfection experiments showed that Oincreased DBP formation most significantly, which was consistent with the result of characterization properties variations. Then canonical correspondent analysis (CCA) and Pearson’s correlation analysis were conducted based on the characterization data and DBP formation. CCA indicated that C-DBPs formation was highly dependent on fluorescent data. The formation of haloacetic acids (HAAs) had a positive correlation with aromatic protein-like component while trichloromethane (TCM) had a positive correlation with fulvic acid-like ***’s correlation analysis showed that low molecular weight fractions were favorable to form N-DBPs. Therefore, characterization data could provide the advantages in the control of DBP formation, which further revealed that KMnOand ClOwere better options for removing algal cells as well as limiting DBP formation.

关键词： Algal organic matters Pre-oxidation Disinfection by-products

Spatial Distributions of Atmospheric Radiative Fluxes and Heating Rates over China during Summer

在线全文

学校读者我要写书评

暂无评论

Atmospheric and Oceanic Science Letters 2010年第5期3卷 248-251页

作者： YANG da-sheng WANG Pu-Cai Key Laboratory for the Middle Atmosphere and Global Environmental Observation （LAGEO） Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Meteorological Observation Center China Meteorological Administration Beijing 100081 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

The latitude-altitude distributions of radiative fluxes and heating rates are investigated by utilizing CloudSat satellite data over China during summer. The Tibetan Plateau causes the downward shortwave fluxes of the lower atmosphere over central China to be smaller than the fluxes over southern and northern China by generating more clouds. The existence of a larger quantity of clouds over central China reflects a greater amount of solar radiation back into space. The vertical gradients of upward shortwave radiative fluxes in the atmosphere below 8 km are greater than those above 8 km. The latitudinal-altitude distributions of downward longwave radiative fluxes show a slantwise decreasing trend from low latitudes to high latitudes that gradually weaken in the downward direction. The upward longwave radiative fluxes also weaken in the upward direction but with larger gradients. The maximum heating rates by solar radiation and cooling rates by longwave infrared radiation are located over 28 40°N at 7 8 km mean sea level (MSL), and they are larger than the rates in the northern and southern regions. The heating and cooling rates match well both vertically and geographically.

关键词： radiative flux, shortwave heating rate, long- wave cooling rate, vertical distribution, temporal and spatial distribution. CloudSat. Cloud Profilin Radar

The influence of amino acids on aztreonam spray-dried powders for inhalation

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Pharmaceutical Sciences 2015年第6期10卷 541-548页

作者： Xiao-Fei Yang Ying Xu da-sheng Qu Hao-Ying Li College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China Testing and Analysis Centre Soochow UniversitySuzhou 215123China Suzhou Hui-Ren Biotech Co.Ltd Suzhou 215513China

The dry powder inhalation of antibiotics for the treatment of lung infections has attracted drastically increasing attention as it offers rapid local therapy at lower doses and minimal side *** this study,aztreonam(AZT)was used as the model antibiotic and spraydried to prepare powders for *** acids of glycine(GLY),histidine(HIS)and leucine(LEU)were used as excipients to modify the spray-dried *** was demonstrated that the GLY-AZT spray-dried powders formed huge agglomerates with the size of 144.51μm,which made it very difficult to be delivered to the lungs(FPF:0.29%w/w only).In comparison with the AZT spray-dried powders,HIS-modified spray-dried powders showed increased compressibility,indicating larger distance and less cohesion between particles;while the LEU-modified spray-dried particles showed a hollow structure with significantly decreased *** fine particle fraction for HIS-and LEU-modified powders was 51.4%w/w and 61.7%w/w,respectively,and both were significantly increased(one-way ANOVA,Duncan’s test,P<0.05)compared to that of AZT spray-dried powders(45.4%w/w),showing a great potential to be applied in clinic.

关键词： Aztreonam Spray-drying Inhalation Amino acids