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Recrystallization Modelling of Hot Deformed Si-Mn TRIP Steel

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Journal of Iron and Steel Research International 2007年第2期14卷 61-65页

作者： WU di ZHAO Xian-ming State Key Laboratory of Rolling Technology and Automation Northeastern University Shenyang 110004 Liaoning China

By means of hot compression single and double hit experiments, the kinetics of dynamic and static recrystallization in hot-rolled Si-Mn TRIP steel was studied, and the emphasis was put on the influence of high silicon content. The results show that the calculated parameters are consistent with the experimental ones, and addition of silicon retards both dynamic and static recrystallization as well as increases the flow stress of austenite, and the non-recrystallization zone can be enlarged by increasing the silicon contents.

关键词： dynamic recrystallization static recrystallization mathematical model TRIP steel silicon

Novel glucose-lowering drugs for non-alcoholic fatty liver disease

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World Journal of diabetes 2021年第1期12卷 84-97页

作者： Zuo-di Fu Xiao-Ling cai Wen-Jia Yang ming-ming Zhao Ran Li Yu-Feng Li Department of Endocrinology Beijing Friendship Hospital Pinggu CampusBeijing 101200China Department of Endocrinology and Metabolism Peking University People’s HospitalBeijing 100044China The Institute of Cardiovascular Sciences School of Basic Medical SciencesHealth Science CenterPeking UniversityBeijing 100079China Sport Science School Beijing Sport UniversityBeijing 100078China Department of Endocrinology Beijing Friendship Hospital Pinggu CampusCapital Medical UniversityBeijing 101200China

BACKGROUND The efficacy of novel glucose-lowering drugs in treating non-alcoholic fatty liver disease(NAFLD)is *** To evaluate the efficacy of glucose-lowering drugs dipeptidyl peptidase-4(DPP-4)inhibitors,glucagon-like peptide-1 receptor agonists(GLP-1 RAs),and sodiumglucose cotransporter 2(SGLT2)inhibitors in treating NAFLD and to perform a comparison between these *** Electronic databases were systematically *** inclusion criteria were:Randomized controlled trials comparing DPP-4 inhibitors,GLP-1 RAs,or SGLT2 inhibitors against placebo or other active glucose-lowering drugs in NAFLD patients,with outcomes of changes in liver enzyme[alanine aminotransferase(ALT)and/or aspartate aminotransferase(AST)]from *** Nineteen studies were finally included in this *** with placebo or other active glucose-lowering drug treatment,treatment with DPP-4 inhibitors,GLP-1 RAs,and SGLT2 inhibitors all led to a significant decrease in ALT change and AST change from *** difference between the DPP-4 inhibitor and SGLT2 inhibitor groups in ALT change was significant in favor of DPP-4 inhibitor treatment(Pdicating a beneficial effect in improving liver injury and reducing liver fat in NAFLD patients.

关键词： Non-alcoholic fatty liver disease Glucose-lowering drug Meta-analysis dipeptidyl peptidase-4 inhibitor Sodium-glucose cotransporter 2 inhibitor Glucagon-like peptide-1 receptor agonist

Characteristics of water contamination in abandoned coal mines:a case study on Yudong River area,Kaili,Guizhou Province,China

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International Journal of Coal Science & Technology 2021年第6期8卷 1491-1503页

作者： Xiangdong Li Jieying cai di Chen Qiyan Feng School of Environment Science and Spatial Informatics China University of Mining and TechnologyXuzhou 221116China Low Carbon Energy Institute China University of Mining and TechnologyXuzhou 221116China

The seasonal and spatial changes in the chemical composition of the water in abandoned mine drainages and rivers in Yudong River area in the years of 2017-2018 were *** effects of mine water drainage on the seasonality and physicochemical properties of the river water after mine closure were evaluated,and the feasibility of irrigation using river water and the degree of pollution to farmland were assessed using the Water Quality Standard for Farmland *** results show that the mine water has low pH value(dition,the pH of the mine water is negatively correlated with the presence of other metal *** correlation coefficient between the chemical oxygen demand(COD)and Fe reached *** the pollution levels of Pinglu and Baishui rivers were low,the confluence region of the two rivers was seriously ***,only the levels of Fe and Cd slightly exceeded the Surface Water Environmental Quality Standard after the confluence of Yudong and Chongan ***,the heavy pollution type of the confluent river is consistent with mine water *** water quality is slightly better in the dry season compared than in the high-water *** and Fe content decreased by 39 and 16 mg/L,respectively,and Cd content decreased *** these findings,this study shows that from 2017 to 2018,the pH and Cd content of the rivers at the confluence exceeded the irrigation limit and the water quality continued to deteriorate,which may pose a soil contamination ***-term use of the river for irrigation water may cause toxic elements such as Cd,Fe,Mn,SO_(4)^(2−),Al,and F-to enter the food chain,thereby endangering the life and health of villagers in Yudong River area.

关键词： Yudong River(Guizhou) Closed coal mine Surface water pollution Irrigation water quality Soil and crop hazards

APPLIED RESEARCH ON NEW MULTI-FUNCTION GASOLINE ADdiTIVE

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Chinese Journal of Mechanical Engineering 2006年第4期19卷 626-632页

作者： cai Ruibin ming caibing GAO Zhiwen College of Automotive Engineering South China University of Technology Guangdong 510640 China Guangdong Key Laboratory for Electric Vehicle Research Guangdong 510640 China CNPC Lanzhou Petroleum ＆ Chemical Corperation Lanzhou 730060 China

In order to assess the performance of a new cleansing and combustion-improving gasoline additive （MAZ）, and to explore the evaluation methods of additives, two engines with the same model number and performance indices, fueled with and without the MAZ gasoline additive respectively, are carried through 100 h strenuous tests on a bench. The results obtained in full load characteristic and load characteristics of different operational modes are compared. It indicates that the power, economy and emission of the engine fueled with the MAZ additive all have obvious improvement in comparison with the engine without adding the additive： the power increasing by 16.43%, specific fuel consumption （SFC） decreasing 5.39%, and the emission of CO, HC and NOx falling by 28.61%, 54.38% and 10.1% respectively. Wear and tear of the engine cylinder is weakened, and sediment of combustion chamber inner side is reduced. In addition, no negative effect on the catalytic conversion device is found.

关键词： Gasoline additives Strenuous tests Energy-saving Exhaust emission

Schemes for Probabilistic Teleportation of a Three-Atom GHZ Class State via Cavity QED

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Communications in Theoretical Physics 2007年第3X期48卷 435-440页

作者： WANG Yi-cai LIU Jin-ming Key Laboratory of Optical and Magnetic Resonance Spectroscopy Department of Physics East China Normal UniversityShanghai 200062 China

Using a quantum channel composed of a two-atom and a three-atom nonmaximally entangled states, we present two schemes to teleport a three-atom GHZ class state via entanglement swapping in cavity QED with different success probabilities. The schemes can be respectively realized with the large-detuned vacuum cavities and with the large-detuned thermal cavities by separate atomic measurements after we choose appropriate atom-cavity-field interaction time.

关键词： teleportation probabilistic entangled state cavity QED

Structural characteristics and drivers of greenhouse gas emissions at county-level and long-time scales:A case study of the Anji County,China

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Journal of Environmental Sciences 2024年第6期140卷 319-330页

作者： Zhouxiang cai Liting Hu di Chen Ying Zhang Xuekun Fang College of Environmental&Resource Sciences Zhejiang UniversityHangzhou 310058China Center for Global Change Science Massachusetts Institute of TechnologyCambridgeMA 02139United States Anji Meteorological Bureau Anji 313300China

To achieve carbon neutrality,the Chinese government needs to gain a comprehensive understanding of the sources and drivers of greenhouse gas(GHG)emissions,particularly at the county *** County in eastern China is a typical example of an industrial transformation from quarrying to a low-carbon *** study analyzed the decoupling types and structural characteristics of GHG emissions and the driving factors of carbon dioxide(CO_(2))emissions in the Anji from 2006 to 2019,and explored the differences between countylevel and provincial-level or city-level *** was observed that energy-related activities are the main source of GHG emissions in Anji and that economic development is the driving factor behind the increasing CO_(2)***,industrial transformation and upgradation coupled with the alternative use of clean energy limit the growth of GHG *** study details the GHG emissions of county during the industrial transformation stage and provides corresponding policy recommendations for county governments.

关键词： County GHG emissions Decoupling Driving factors Policy recommendations

Recent advances in statistical methodologies in evaluating program for high-dimensional data

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Applied Mathematics(A Journal of Chinese Universities) 2022年第1期37卷 131-146页

作者： ZHAN ming-feng cai Zong-wu FANG Ying LIN ming Wang Yanan Institute for Studies in Economics and Fujian Key Laboratory of Statistical Sciences Xiamen UniversityXiamen 361005China Department of Economics University of KansasLawrenceKS 66045USA Department of Statistics and Data Science Xiamen UniversityXiamen 361005China

The era of big data brings opportunities and challenges to developing new statistical methods and models to evaluate social programs or economic policies or interventions. This paper provides a comprehensive review on some recent advances in statistical methodologies and models to evaluate programs with high-dimensional data. In particular, four kinds of methods for making valid statistical inferences for treatment effects in high dimensions are addressed. The first one is the so-called doubly robust type estimation, which models the outcome regression and propensity score functions simultaneously. The second one is the covariate balance method to construct the treatment effect estimators. The third one is the sufficient dimension reduction approach for causal inferences. The last one is the machine learning procedure directly or indirectly to make statistical inferences to treatment effect. In such a way, some of these methods and models are closely related to the de-biased Lasso type methods for the regression model with high dimensions in the statistical literature. Finally, some future research topics are also discussed.

关键词： causal inference covariate balance de-biased Lasso dimension reduction doubly robust high dimensions machine learning treatment effect

Effect of the lenticles on moisture migration in capillary zone of tailings dam

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International Journal of Minerals,Metallurgy and Materials 2020年第8期27卷 1036-1045页

作者： di Liu Min-jie Lian cai-wu Lu Wen Zhang College of Materials Science and Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Institute of Mining System Engineering Xi’an University of Architecture and TechnologyXi’an 710055China Sinosteel Mining Co. Ltd.Beijing 100080China School of Resource Engineering Xi’an University of Architecture and TechnologyXi’an 710055China

Small-particle interlayers(lenticles)show some characteristic hydraulic properties and can affect the movement of unsaturated *** this study,we developed a novel online capillary-water-absorption monitoring device and conducted three groups of comparison tests to simulate lenticle positions and thicknesses with respect to the capillary *** results show that the characteristic wetting front exhibits a fast rise in the early stage,a slow rise in the middle stage,and stability in the later *** motion of the capillary water in the lenticle is mainly transversal,with the upward curve being"flat,"and the longer is"flat,"the longer is the time needed for the water to *** interlayer can form a capillary stagnation zone with moisture content close to *** high interlayer may form a discontinuous corrugated capillary ***,when the wetting front reaches the"coarse-grain(lower)-fine-grain(upper)"interface,the"anti-capillary barrier effect"results in more moisture in the upper ***,when the wetting front of the capillary water reaches the"fine-grain(upper)-coarse-grain(lower)"interface,the"capillary barrier effect"causes the moisture content of the upper tailings to decreases sharply because of the horizontal movement of the water in the fine *** is clear that the presence of lenticles can retard the rise of capillary water by storing water.

关键词： tailings lenticle moisture migration capillary retarding effect microcosmic mechanism

Competitive and cooperative adsorption behaviors of phenol and aniline onto nonpolar macroreticular adsorbents

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Journal of Environmental Sciences 2005年第4期17卷 529-534页

作者： ZHANGWei-ming CHENJin-long PANBing-cai ZHANGQuan-xing StateKeyLaboratoryofPollutionControlandResourcesReuse SchooloftheEnvironmentNanjingUniversityNanjing210093China

The adsorption behaviors of phenol and aniline on nonpolar macroreticular adsorbents(NDA100 and Amberlite XAD4) were investigated in single or binary batch system at 293K and 313K respectively in this study. The results indicated that the adsorption isotherms of phenol and aniline on both adsorbents in both systems fitted well Langmuir equation, which indicated a favourable and exothermic process. At the lower equilibrium concentrations, the individual amount adsorbed of phenol or aniline on macroreticular adsorbents in single-component systems was higher than those in binary-component systems because of the competition between phenol and aniline towards the adsorption sites. It is noteworthy, on the contrast, that at higher concentrations, the total uptake amounts of phenol and aniline in binary-component systems were obviously larger than that in single-component systems, and a large excess was noted on the adsorbent surface at saturation, which is presumably due to the cooperative effect primarily arisen from the hydrogen bonding or weak acid-base interaction between phenol and aniline.

关键词： macroreticular adsorbent phenol aniline competitive adsorption cooperative adsorption