检索结果-南通市图书馆

Acta Metallurgica Sinica(English Letters) 2018年第3期31卷 281-289页

作者： Zhi-Nan Wang Tian Liang Wei-Wei Xing ai-bing du Ming Gao Ying-Che Ma Kui Liu Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China China Institute of Atomic Energy Beijing 102413China

The σ-phase precipitation in 20% cold-worked 15Cr-15Ni titanium-modified austenitic stainless steel was studied during long-term aging *** the isothermal aging stage,the amount of a-phase was significantly increased at beginning and gradually became *** aging time only slightly affected the size and morphology of the σ-***,during the isochronal aging stage,the amount ofσ-phase grew rapidly with the increase in the aging *** σ-phase with a large amount of stacking faults was prone to nucleate around the（Ti,Mo）C particles or at the grain ***（Ti,Mo）C particles can act as effective nucleation sites,where the σ-phase directly precipitates from the austenitic *** this work,the growth of σ-phase is found to be influenced by the aging temperature,and a new mechanism of σ-phase precipitation from austenite has been proposed.

关键词： Austenitic stainless steel Aging treatment σ-phase precipitation Carbides

Effects of Titanium and Silicon on the Swelling Behavior of 15–15Ti Steels by Heavy-Ion Beam Irradiation

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2017年第11期30卷 1049-1054页

作者： ai-bing du Wei Feng Hai-Liang Ma Tian Liang Da-Qing Yuan Ping Fan Qiao-Li Zhang Chen Huang China Institute of Atomic Energy Beijing 102413 China Institute of Metal Research Chinese Academy of SciencesShenyang 110016 China

The swelling behavior of 20% cold-worked 15-15Ti steels with （0.23-0.40） wt% titanium and （0.42-0.81） wt% silicon content after heavy-ion beam irradiation has been investigated by transmission electron microscopy. The results show that 15-15Ti steel with higher titanium content displays lower swelling. As silicon content increases, the cavity size and the swelling of the 15-15Ti steels decrease obviously. Titanium and silicon may play important roles in suppressing the cavity nucleation and growth in 15-15Ti steel.

关键词： 15–15Ti Swelling Heavy-ion beam irradiation

N-doped core-shell mesoporous carbon spheres embedded by Ni nanoparticles for CO_(2)electroreduction

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2023年第7期42卷 2284-2293页

作者： Juan du Qin-Yan Lin Jian-Qi Zhang Sen-Lin Hou ai-bing Chen College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang050018China The Second Hospital of Hebei Medical University Shijiazhuang050000China

Herein,we successfully prepare highly dispersed and uniform small nano-size nickel nanoparticles embedded on core-shell carbon spheres by confined-deposition *** mesoporous silica layer containing surfactant coated on the surface of the polymer sphere provides confined space and effectively controls the growth of nickel nanoparticles during *** the same time,the introduction of nickel species has an impact on structure of the obtained carbon spheres,and it can promote the deposition of carbon to realize the adjustment from hollow to core-shell and then to solid *** to the uniform distribution of Ni nanoparticles with small size,mesoporous structure,N-doping groups,high specified surface areas,and core-shell structure,the obtained catalyst shows exciting ability for the production of CO by reduction of CO_(2)with a maximum CO Faradaic efficiency of 98%,indicating its promising prospect in electro-reduction of CO_(2).

关键词： Core-shell carbon spheres Small nano-size nickel nanoparticles Confined space Carbon deposition CO_(2)electroreduction

Assessment of future Antarctic amplification of surface temperature change under different Scenarios from CMIP6

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2023年第4期20卷 1074-1089页

作者： ZHU Jiang-ping XIE ai-hong QIN Xiang XU bing State Key Laboratory of Cryospheric Sciences Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000China University of Chinese Academy of Sciences Beijing100049China Weather Modification Office of Liaoning Province Shenyang110000China

Global warming may result in increased polar amplification,but future temperature changes under different climate change scenarios have not been systematically investigated over *** index of Antarctic amplification(AnA)is defined,and the annual and seasonal variations of Antarctic mean temperature are examined from projections of the Coupled Model Intercomparison Project Phase 6(CMIP6)under scenarios SSP119,SSP126,SSP245,SSP370 and *** occurs under all scenarios,and is strongest in the austral summer and autumn,with an AnA index greater than *** the warming over Antarctica accelerates with increased anthropogenic forcing,the magnitude of AnA is greatest in SSP126 instead of in SSP585,which may be affected by strong ocean heat uptake in high forcing ***,future AnA shows seasonal difference and regional *** is most conspicuous in the East Antarctic sector,with the amplification occurring under all scenarios and in all seasons,especially in austral summer when the AnA index is greater than 1.50,and the weakest signal appears in austral ***,the AnA over West Antarctica is strongest in austral *** SSP585,the temperature increase over the Antarctic Peninsula exceeds 0.5℃when the global average warming increases from 1.5℃to 2.0℃above preindustrial levels,except in the austral summer,and the AnA index in this region is strong in the austral autumn and *** projections suggest that the warming rate under different scenarios might make a large difference to the future AnA.

关键词： Antarctic Amplification Amplification index CMIP6 ScenarioMIP Near-surface temperature Climate change

A Mooring System Deployment Design Methodology for Vessels at Varying Water Depths

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2020年第2期34卷 185-197页

作者： XU Sheng-wen LIANG Ming-xiao WANG Xue-feng DING ai-bing State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) Shanghai 200240China School of Naval Architecture Ocean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China

In this paper,a methodology for designing mooring system deployment for vessels at varying water depths is *** Non-dominated Sorting Genetic Algorithm-II(NSGA-II)is combined with a self-dependently developed vessel-mooring coupled program to find the optimal mooring system deployment considering both station-keeping requirements and the safety of the mooring *** case studies are presented to demonstrate the methodology by designing the mooring system deployments for a very large floating structure(VLFS)module and a semi-submersible platform respectively at three different water *** can be concluded from the obtained results that the mooring system can achieve a better station-keeping ability with relatively shorter mooring line when deployed in the shallow *** safety factor of mooring line is mainly dominated by the maximum instantaneous tension increment in the shallow water,while the pre-tension has a decisive influence on the safety factor of the mooring line in the deep water.

关键词： mooring system deployment design methodology NSGA-II varying water depths

Granule Size Distribution and Porosity of Granule Packing

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2008年第5期15卷 1-5页

作者： Dai Shu-hua SHEN Feng-man YU ai-bing School of Materials and Metallurgy Northeastern University Shenyang 110004 Liaoning China School of Raw Material Science and Engineering University of New Southern Wales Sydney NSW2052 Australia

The granule size distribution and the porosity of the granule packing process were researched. For realizing the optimizing control of the whole sintering production process, researchers must know the factors influencing the granule size distribution and the porosity. Therefore, tests were carried out in the laboratory with regard to the influences of the size and size distribution of raw materials and the total moisture content on the size and size distribution of granule. Moreover, tests for finding out the influences of the moisture content and the granule volume fraction on the porosity were also carried out. The results show that （1） the raw material has little influence on granulation when its size is in the range of 0. 51 mm to 1.0 mm; （2） the influence of the material size on granule size plays a dominant role, and in contrast, the moisture content creates a minor effect on granule size; （3） in binary packing system, with the increase in the constituent volume fraction, the porosity initially increases and then decreases, and there is a minimum value on the porosity curve of the binary mixture system; （4） the minimum value of the porosity in binary packing system occurs at different locations for different moisture contents, and this value shifts from right to left on the porosity curve with increasing the moisture content; （5） the addition of small granules to the same size component cannot create a significant influence on the porosity, whereas the addition of large granules to the same system can greatly change the porosity.

关键词： granule raw material size distribution granulation granule packing porosity

TRIM4 modulates type I interferon induction and cellular antiviral response by targeting RIG-I for K63-1inked ubiquitination

在线全文

学校读者我要写书评

暂无评论

Journal of Molecular Cell Biology 2014年第2期8卷 154-163页

作者： Jie Yan Qi Li ai-Ping Mao Hong-bing Shu College of Life Sciences Wuhan University Wuhan 430072 China

RIG-I is a pivotal cytoplasmic sensor that recognizes different species of viral RNAs. This recognition leads to activation of the transcription factors NF-κB and IRF3, which collaborate to induce type I interferons （IFNs） and innate antiviral response. In this study, we identified the TRIM family protein TRIM4 as a positive regulator of RIG-I-mediated IFN induction. Overexpression of TRIM4 potentiated virus-triggered activation of IRF3 and NF-κB, as well as IFN-13 induction, whereas knockdown of TRIM4 had opposite effects. Mechanistically, TRIM4 associates with RIG-I and targets it for K63-linked poiyubiquitination. Our findings demonstrate that TRIM4 is an important regulator of the virus-induced IFN induction pathways by mediating RIG-I for K63-Unked ubiquitination.

关键词： TRIM4 RIG-I ubiquitination type I interferon antiviral response

Template Syntheses and Crystal Structures of Hexaaza Macrocyclic Complexes with C-Methyl Substituents

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 Structural Chemistry 2005年第11期24卷 1259-1263页

作者： ZHANG bing KOU Hui-Zhong CUI ai-Li WANG Ru-Ji Department of Chemistry Tsinghua University Beijing 100084 China

Two new macrocyclic complexes with C-methyl substituents on the framework, namely, [CuL]（ClO4）2 （L = 5,12-dimethyl-1,8-dihydroxyethyl-1,3,6,8,10,13-hexaazacyclotetradecane） 1 and [NiL]（ClO4）2 2, have been synthesized and structurally characterized through X-ray diffraction analysis. Also, crystal structure of [CuL^1]（ClO4）2 （L^1 = 1,8-dimethyl- 1,3,6,8, [ 0,13- hexaazacyclotetradecane） 3 has been determined. Crystal data for 1： C14H32C12CuN6O10, Mr = 578.90, monoclinic, P2 1/n, α = 8.3529（11）, b = 10.8105（17）, c = 13.3709（17） ,A, β = 105.189（10）°, V= 1165.2（3） A3, Z = 2, Dc = 1.650 g/cm^3, F（000） = 602, λ（MoKct） = 0.71073 A,μ = 1.229 mm ^-1, R = 0.0474 and wR = 0.0895 for 2771 observed reflections （I 〉 2σ（Ⅰ））. Crystal data for 2： C14H32C12N6NiO10, Mr = 574.07, monoclinic, P2 1/c, a = 8.3636（12）, b = 12.997（2）, c = 10.764（2） A, β = 99.31（2）°, V = 1154.7（3） A^3, Z = 2, DC = 1.651 g/cm^3, F（000） = 600, λ（MoKa） = 0.71073 A,μ = 1. 134 mm^-1, R = 0.0380 and wR = 0.0796 for 2670 observed reflections （i 〉 2σ（Ⅰ））. Crystal data for 3： C 10H26Cl2CuN6O8, Mr = 492.81, monoclinic, P2 1/n, a = 8.4860（17）, b = 8.6320（17）, c = 12.662（3） ,A,β = 103.40（3）°, V = 902.2（3）A^3, Z = 2, Dc = 1.814 g/cm^3, F（000） = 510, λ（MoKa） = 0.71073A, μ = 1.562 mm^-1, R = 0.0505 and wR = 0.1061 for 1967 observed reflections （I〉 2σ（Ⅰ））. Complexes 1 and 2 are isostructural with the metal ions situated at the inversion center/Hydrogen bonds between O atoms of pendant and perchlorate anion give rise to a two-dimensional supramolecular layer. The Cu（Ⅱ） ions of compounds 1 and 3 adopt distorted axially-elongated octahedral coordinate geometry, and the nickel（Ⅱ） ion in complex 2 is four-coordinated with a square-planar configuration.

关键词： synthesis crystal structure macrocycle C-methyl substituent copper nickel synthesis crystal structure macrocycle C-methyl substituent copper nickel

Surface modification of MCM-41 and its application in DNA adsorption

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2016年第1期27卷 139-144页

作者： Xiu-Yu Sun Peng-Zhang Li bing ai Yue-Bo Wang School of Chemical Engineering Shandong University of Technology

Three types of MCM-41 absorbents, namely, Al^（3＋）-MCM-41, La^（3＋）-MCM-41, and Zn^（2＋）-MCM-41, were prepared through amine grafting, phosphonate modification, and metal ion chelation and characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, and N2adsorption-desorption analysis. Results revealed that functionalized MCM-41 maintains the original structure of the molecular sieve and that the pore diameter and surface area are reduced compared with those of pure MCM-41. The adsorption behavior of DNA molecules on the surface of the modified molecular sieves was discussed according to the hard-soft acid-base（HSAB） principle. Experimental results showed that DNA purification could be effectively carried out on functionalized MCM-41 and that DNA is easily released by3-4 molL^（-1）NaCl solution. This study could be used as a general platform for future work on DNA adsorption and enrichment.

关键词： MCM-41 Surface modification DNA Adsorption

Prediction of Endpoint Phosphorus Content of Molten Steel in BOF Using Weighted K-Means and GMDH Neural Network

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2012年第1期19卷 11-16页

作者： WANG Hong-bing XU An-jun ai Li-xiang TIAN Nai-yuan School of Computer and Communication Engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory of Advanced Control of Iron and Steel Process of Ministry of Education Beijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China

The hybrid method composed of clustering and predicting stages is proposed to predict the endpoint phos- phorus content of molten steel in BOF （Basic Oxygen Furnace）. At the clustering stage, the weighted K-means is performed to generate some clusters with homogeneous data. The weights of factors influencing the target are calcu- lated using EWM （Entropy Weight Method）. At the predicting stage, one GMDH （Group Method of Data Handling） polynomial neural network is built for each cluster. And the predictive results from all the GMDH polynomial neural networks are integrated into a whole to be the result for the hybrid method. The hybrid method, GMDH polnomial neural network and BP neural network are employed for a comparison. The results show that the proposed hybrid method is effective in predicting the endpoint phosphorus content of molten steel in BOF. Furthermore, the hybrid method outperforms BP neural network and GMDH polynomial neural network.

关键词： basic oxygen furnace endpoint phosphorus content K-means neural network GMDH