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Thermal properties of diamond/Al composites by pressure infiltration:comparison between methods of coating Ti onto diamond surfaces and adding Si into Al matrix

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Rare Metals 2016年第3期35卷 249-255页

作者： cai-Yu Guo Xin-bo He Shu-Bin Ren Xuan-Hui Qu Institute for Advanced Materials and Technology University of Science and Technology Beijing

This study was pertained to the effects of Ti coating on diamond surfaces and Si addition into Al matrix on the thermal conductivity（TC） and the coefficient of thermal expansion（CTE） of diamond/Al composites by pressure *** fracture surfaces,interface microstructures by metal electro-etching and interfacial thermal conductance of the composites prepared by two methods were *** results reveal that Ti coating on diamond surfaces and only12.2 wt% Si addition into Al matrix could both improve the interfacial bonding and increase the TCs of the *** the Ti coating layer introduces more interfacial thermal barrier at the diamond/Al interface compared to adding 12.2 wt% Si into Al *** diamond/Al composite with 12.2 wt% Si addition exhibits maximum TC of 534 W·m^-1·K^-1and a very low CTE of 8.9×10^-6K^-1,while the coating Ti-diamond/Al composite has a TC of 514 W·m^-1·K^-1 and a CTE of 11.0×10^-6K^-1.

关键词： Metal matrix composites Coating Thermal conductivity Coefficient of thermal expansion Pressure infiltration

Exploring the Possibility of Deformation Twinning in Pure Aluminum

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Acta Metallurgica Sinica(English Letters) 2016年第7期29卷 647-651页

作者： Tuo cai Zhen-Jun Zhang Jin-bo Yang Zhe-Feng Zhang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of Sciences

Can aluminum generate deformation twins？ Contradictories exist among the experimental results, theoretical predictions, and molecular dynamics simulations. Our first-principles calculations based on the full-potential linearly augmented plane wave method show that the bonding electron density of aluminum gathers at the tetrahedral interstices, and this specific electronic structure is in agreement with the experimental data from quantitative convergent-beam electron diffraction. In terms of this characteristic, the matching between the cohesive energy of local deformation twins with different thickness and global matrix can shed light on deformation twins in aluminum. This study may give a lane to insight into deformation twins in different metals.

关键词： Metals and alloys Deformation twinning First-principles Density functional theory

Effects of temperature on conversion of Li2CO3 to LiOH in Ca（OH）2 suspension

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Particuology 2017年第5期15卷 97-102页

作者： bo Yuan Jing Wang Wei cai Yurong Yang Meigui Yi Lan Xiang College of Chemical Engineering Sichuan University Chengdu 610065 China Department of Chemical Engineering Tsinghua University Beijing 100084 China

The effects of temperature on the convecsion of Li2 CO3 Co LiOH in a Ca（OH）2 suspension were investigated. Li2CO3 microplates were used as the Li source. The results showed that Li2CO3 was converted to LiOH via in situ ion-exchange and dissolution-precipitation routes. The formation of mixed CaxLiz-2xCO3 inter- mediate species confirmed that at 25℃ need/e-like CaCO3 was formed heterogeneously on the Li2CO3 surface via in situ ion-exchange. At 60-100℃, isolated CaCO3 agglomerates were formed homogeneously via dissolution-precipitation. Temperature increases accelerated the dissolution and conversion of Li2 CO3 to LiOH, producing solutions with high [CO32-1][Ca^2＋] ratios; this favored homogeneous precipitation of isolated CaCO3 agglomerates,

关键词： Lithium carbonate (Li2CO3)CausticizationIn sitn ion-exchangeDissolution-precipitation

Skin-inspired interface modification strategy toward a structurefunction integrated hybrid smart fabric system with self-powered sensing property for versatile applications

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Nano Research 2024年第9期17卷 8200-8208页

作者： Xiang Cheng Teng Chen De Gong Pengcheng Ma bo Chen Jun cai Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100190China School of Mechanical Engineering and Automation Beihang UniversityBeijing 100191China Beijing U-Precision Tech Co. Ltd.Beijing 100176China University of Chinese Academy of Sciences Beijing 100049China

Fabric-based composites with superior mechanical properties and excellent perceptive function are highly ***,it remains a huge challenge to attain structure-function integration,especially for hybrid fabric ***,a skin-inspired interface modification strategy is proposed toward this target by constructing a hybrid smart fabric system consisting of two types of smart fabrics:carbon nanotube(CNT)/MXene-modified aramid fabrics and zinc oxide nanorod(ZnO NR)-modified carbon *** on that,flexible piezoelectric pressure sensors with skin-like hierarchical perception interfaces are fabricated,which demonstrate superb sensitivity of 2.39 V·kPa^(-1)and are capable of various wearable monitoring ***,the interface-modified hybrid fabric reinforced plastics can also be fabricated,which are proven to possess 13.6%higher tensile strength,10.1%elastic *** impressively,their average energy absorption can be improved by 111.9%,accompanied with inherent damage alert *** offers a paradigm to fabricate structure-function integrated hybrid smart fabric composites for the smart clothing and intelligent aerial vehicles.

关键词： hybrid fabrics interface modification piezoelectric pressure sensors self-diagnostic composites structure-function integration

Financial deepening and regional economic growth Analysis on Circum-bohai-Sea Region

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Chinese Business Review 2010年第3期9卷 43-50页

作者： cai hong-bo GU Jing School of Economics and Business Administration Beijing Normal University Beijing 100875 China

Financial deepening can improve economic growth by facilitating capital liquidity and promoting efficiency of allocating resource, which has played an important role in the development of the Pearl River Delta and the Yangtze River Delta in China. As a new economic growth pole, Circum-bohai-Sea Region should focus on internal financial deepening. In this paper, SWOT analysis is used to observe the level of financial deepening in Circum-bohai-Sea Region, and some related policy suggestions are given in the end.

关键词： financial deepening (FD) economic growth Circum-bohai-Sea Region (CBSR) SWOT

3D anatomy and flow dynamics of net-depositional cyclic steps on the world’s largest submarine fan:a joint 3D seismic and numerical approach

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Petroleum Science 2021年第1期18卷 10-28页

作者： Da-Li Shao Guo-Zhang Fan Hai-Qiang Wang hong-Xia Ma Guo-Ping Zuo Liang-bo Ding Zheng cai Wei-Qiang Li PetroChina Hangzhou Research Institute of Geology Hangzhou 310023ZhejiangChina Chinnery Assets Limited YangonMyanmar

Supercritical flows are ubiquitous in natural environments;however,there is rare 3D anatomy of their *** study uses high-quality 3D seismic datasets from the world’s largest submarine fan,Bengal Fan,to interpret 3D architectures and flow processes of Pliocene undulating bedforms that were related to supercritical *** undulating bedforms as documented in this study were developed in unconfined settings,and are seismically imaged as strike-elongated,crescentic bedforms in plan view and as rhythmically undulating,upstream migrating,erosive,discontinuous reflections in section *** lee sides are overall 3 to 4 times steeper(0.280 to 1.19°in slope)and 3 to 4 times shorter(117 to 419 m in length)than their stoss flanks and were ascribed to faster(high flow velocities of 2.70 to 3.98 m/s)supercritical flows(Froude numbers of 1.53 to 2.27).Their stoss sides,in contrast,are overall 3 to 4 times gentler(0.120 to 0.270 in slope)and 3 to 4 times longer(410 to 1139 m in length)than their lee flanks and were related to slower(low velocities of 2.35 to 3.05 m/s)subcritical flows(Froude numbers of 0.58 to 0.97).Bengal wave-like features were,thus,created by supercriticalto-subcritical flow transformations through internal hydraulic jumps(i.e.,cyclic steps).They have crests that are positive relative to the surrounding region of the seafloor,suggesting the predominant deposition of draping sediments associated with net-depositional cyclic *** currents forming Bengal wave-like features were,thus,dominated by deposition,resulting in net-depositional cyclic *** deposits associated with Bengal net-depositional cyclic steps are imaged themselves as closely spaced,strike-elongated high RMS-attribute patches,thereby showing closely spaced,long and linear,strike-elongated distribution patterns.

关键词： Sediment waves Net-depositional cyclic steps Supercritical flows Sandy supercritical-flow deposits Bengal Fan

Potassium variability during hospitalization and outcomes after discharge in patients with acute myocardial infarction

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Journal of Geriatric Cardiology 2021年第1期18卷 10-19页

作者： Xi-Ling ZHANG Heng-Xuan cai Shan-Jie WANG Xiao-Yuan ZHANG Xin-Ran HAO Shao-hong FANG Xue-Qin GAO bo YU Department of Cardiology Second Affiliated Hospital of Harbin Medical UniversityHarbinChina The Key Laboratory of Myocardial Ischemia Chinese Ministry of Education246 Xuefu RoadNangang DistrictHarbinChina Department of Neurobiology Neurobiology Key LaboratoryHarbin Medical UniversityEducation Department of Heilongjiang ProvinceHarbinChina

BACKGROUND The variability of metabolic biomarkers has been determined to provide incremental prognosis information,but the implications of electrolyte variability remained *** We investigate the relationships between electrolyte fluctuation and outcomes in survivors of acute myocardial infarction(n=4386).Ion variability was calculated as the coefficient of variation,standard deviation,variability independent of the mean(VIM)and *** ratios(HR)were estimated using the multivariable-adjusted Cox proportional regression *** During a median follow-up of 12 months,161(3.7%)patients died,and heart failure occurred in 550(12.5%)participants after discharge,*** with the bottom quartile,the highest quartile potassium VIM was associated with increased risks of all-cause mortality(HR=2.35,95%CI:1.36–4.06)and heart failure(HR=1.32,95%CI:1.01–1.72)independent of cardiac troponin I(c Tn I),N terminal pro B type natriuretic peptide(NT-pro BNP),infarction site,mean potassium and other traditional factors,while those associations across sodium VIM quartiles were *** trend remains across the strata of variability by other three *** associations were consistent after excluding patients with any extreme electrolyte value and diuretic *** Higher potassium variability but not sodium variability was associated with adverse outcomes *** findings highlight that potassium variability remains a robust risk factor for mortality regardless of clinical dysnatraemia and dyskalaemia.

关键词： AMI BNP Potassium variability during hospitalization and outcomes after discharge in patients with acute myocardial infarction

Valley-resolved transport in zigzag graphene nanoribbon junctions

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Communications in Theoretical Physics 2021年第11期73卷 157-164页

作者： Ming Li Zi-Liang cai Zhi-bo Feng Zheng-Yin Zhao College of Science Xuchang UniversityXuchang 461000China

Applying the transfer matrix and Green’s function methods,we study the valley-resolved transport properties of zigzag graphene nanoribbon(ZGN_(R))*** width of the left and right ZGN_(R)s are N_(L)and N_(R),and N_(L)≥N_(R).The step/dip positions of the conductance G,the intravalley transmission coefficients(TKKand TK’K’),and the valley polarization efficiency PK’K correspond to the subband edges of the right/left ZGN_(R)that are controlled by N_(R)/N_(L).The intervalley transmission coefficients(TKK and TK’K)exhibit peaks at most of the subband edge of the left and right ZGN_(R)*** the bulk gap of the right ZGN_(R),TKK’=TK’K=0,and PKK’=±1,the valley polarization is well *** N_(R)increases,the energy region for PK’K=±1 *** N_(L)is fixed and N_(R)decreases,G,TKK,TK’K’and PKK’exhibit more and more dips,and the peaks of TKK’(TK’K)become more and more high,especially when(N_(L)-N_(R))/2 is *** characters are quite useful for manipulating the valley dependent transport properties of carriers in ZGN_(R)junctions by modulating N_(L)or N_(R),and our results are helpful to the design of valleytronics based on ZGN_(R)junctions.

关键词： transfer matrix method ZGNR junction valley polarization Landauer-Büttiker formula edge state Fund:supported by the Natural Science Foundation of Henan Province under Grant No.212300410388 the“316”Project Plan of Xuchang University

Online Inertia Estimation Using Electromechanical Oscillation Modal Extracted from Synchronized Ambient Data

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Journal of Modern Power Systems and Clean Energy 2022年第1期10卷 241-244页

作者： bo Wang Deyou Yang Guowei cai Jin Ma Zhe Chen Lixin Wang School of Electrical Engineering Northeast Electrical Power UniversityJilin 132012China School of Electrical and Information Engineering The University of SydneySydneyAustralia Department of Energy Technology Aalborg UniversityAalborgDenmark

An ambient modal framework for inertia estimation using synchrophasor data is proposed in this ***,an analytical formulation is developed for the estimation of inertia based on the frequency and damping ratio modes extracted from ambient *** advantage of the proposed framework is that it can rely on synchronized ambient data under non-disturbed conditions for online estimation and tracking of ***,numerical simulation studies and physical experiments demonstrate the feasibility of the proposed approach.

关键词： Inertia electromechanical oscillation ambient modal