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3D Fe-Rich Phases Evolution and Its Effects on the Fracture Behavior of Al-7.0Si-1.2Fe Alloys by Mn Neutralization

Acta Metallurgica Sinica(English Letters) 2022年第1期35卷 163-175页

作者： dong-Fu Song Yu-Liang Zhao Zhi Wang Yi-Wang Jia Dao-Xi Li Ya-Nan Fu Da-Tong Zhang wei-Wen Zhang National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials South China University of TechnologyGuangzhou510641China Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application Institute of New MaterialsGuangdong Academy of SciencesGuangzhou510650China School of Mechanical Engineering Dongguan University of TechnologyDongguan523808China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai201204China

The evolution of the 3D Fe-rich phases of Al-7.0Si-1.2Fe alloys with different Mn contents was visualized and characterized using synchrotron X-ray computed tomography,and the effect of Fe-rich phases with typical morphologies on the fracture behavior during tensile testing was *** results showed that the Fe-rich phase changed from platelet-likeβ-Al_(5) Fe Si intoα-Al_(15)(Fe Mn)_(3)Si_(2)with various morphologies after the addition of *** Mn addition not only significantly reduced the volume fraction,equivalent diameter and interconnectivity of the Fe-rich phase but also greatly increased the sphericity,surface thickness,and distribution of the mean curvature and surface ***,the equivalent diameter ofα-Al_(15)(FeMn)_(3)Si_(2)had an inverse exponential function relationship with its *** 3D morphology ofα-Al_(15)(FeMn)_(3)Si_(2)can be summarized as massive and regular polyhedrons,hollow and regular polyhedrons,and multibranched *** fraction of the different 3D morphologies in each alloy is related to the Mn content,where excess Mn increased the number and volume fraction of the large Fe-rich particles with a low *** ductility of each alloy was significantly improved by the addition of Mn but gradually decreased when the Mn/Fe ratio exceeded *** increase in largeα-Al_(15)(Mn Fe)_(3)Si_(2)with a low sphericity was the main reason for the decreased ductility of alloys with a high Mn content.

关键词： Synchrotron X-ray tomography Fe-rich phase 3D morphology Fracture behavior

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Immunization of mice with concentrated liquor from male zooid of Antheraea pernyi

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World Journal of Gastroenterology 2005年第27期11卷 4254-4257页

作者： Sheng Li Bo Zhang wei-dong Zhang Ting-Hang Ma Yong Huang Long-Hai Yi Jin-Ming Yu Shandong Tumor Hospital Jinan 250117 Shandong Province China Basic Medical Institute of Shandong Academy of Medical Sciences Jinan 250062 Shandong Province China

AIM： To study the effects of concentrated liquor from male zooid of Antheraea pernyion immunological ***： For each experiment, 40 mice were randomly divided into normal saline group （control group） and three tested groups that were administered different dosages of concentrated liquor from male zooid of A. pernyiand food for 15 d. The typical FSR and HC50 value, monocybe-phagocytic exponent Kand emendated monocyte-phagocytic exponent were determined and calculated ***： Alter 24 and 48 h, the FSR values of the three tested groups improved significantly in comparison to the conlyol group by variance analysis. The HCso values showed a significant difference between the high dosage group and the control group, as well as between the high dosage group and other two bested groups. The monocyte-phagocytic exponent Kand emendated exponent α showed rising tendencies, but no significant differences were found by variance ***： The concentrated liquor from male zooid of A. pemyican significantly enhance cellular and humoral immune function in mice, but has no distinct influence on the monocyte-phagocytic system in mice.

关键词： Antheraea pernyi Male zooid Concentratedliquor Mice Immune function

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Ionizing Radiation-Induced RPL23a Reduction Regulates Apoptosis via RPL11-MDM2-p53 Pathway in Mouse Spermatogonia

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Biomedical and Environmental Sciences 2021年第10期34卷 789-802页

作者： HE Yu Xuan GUO Yi xiao ZHANG Yong HU Jun Jie dong wei Tao DU xiang Hong ZHAO Xing Xu College of Veterinary Medicine Gansu Agricultural UniversityLanzhou 730070GansuChina Department of Radiation Oncology Gansu Provincial HospitalLanzhou 730000GansuChina

Objective The expression patterns of ribosomal large subunit protein 23 a(RPL23 a)in mouse testes and GC-1 cells were analyzed to investigate the potential relationship between RPL23 a expression and spermatogonia apoptosis upon exposure to *** Male mice and GC-1 cells were irradiated with X-ray,terminal dUTP nick end-labelling(TUNEL)was performed to detect apoptotic spermatogonia in *** rate and cell cycle phase of GC-1 cells were analyzed with flow *** interactions were detected by Immunoprecipitation and protein localization as studied by *** and real-time PCR were applied to analyze to protein and gene *** Ionizing radiation(IR)increased spermatogonia apoptosis,the expression of RPL11,MDM2 and p53,and decreased RPL23 a expression in mice spermatogonia in vivo and in ***23 a knockdown weakened the interaction between RPL23 a and RPL11,leading to p53 ***,knockdown and IR decreased RPL23 a that induces spermatogonia apoptosis via RPL23 a-RPL11-MDM2-p53 pathway in GC-1 *** These results suggested that IR reduced RPL23 a expression,leading to weakened the RPL23 a-RPL11 interactions,which may have activated p53,resulting in spermatogonia *** results provide insights into environmental and clinical risks of radiotherapy following exposure to IR in male *** graphical abstract was available in the web of ***.

关键词： Ionizing radiation Testis Spermatogonia apoptosis

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Application of Chinese milk vetch affects rice yield and soil productivity in a subtropical double-rice cropping system

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Journal of Integrative Agriculture 2020年第8期19卷 2116-2126页

作者： CHEN Jing-rui QIN Wen-jing CHEN xiao-fen CAO wei-dong QIAN Guo-min LIU Jia XU Chang-xu Institute of Soil&Fertilizer and Resources&Environment Jiangxi Academy of Agricultural SciencesNanchang 330200P.R.China Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Dengjiabu Original Rice Breeding Farm Yingtan 335000P.R.China

Green manure can be used as a substitute for chemical fertilizer without reducing rice *** studied the responses of soil fertility and rice yield to different combinations of Chinese milk vetch(CMV;Astragalus sinicus L.)and chemical fertilizer in a subtropical double-rice cropping *** goal is to reduce chemical fertilizer use and decrease environmental *** with the recommended rate of chemical fertilizer(CF),both early-and late-rice yields in the two treatments supplied with 15 and 22.5 Mg CMV ha^-1 plus 60%CF(represented as 60 A and 60 B,respectively)showed no significant differences while the two treatments supplied with 30 and 37.5 Mg CMV ha^-1 plus 60%CF(represented as 60 C and 60 D,respectively)showed significantly higher *** sustainable yield index(SYI)values in the 60 C and 60 D treatments with double-rice croppong system were significantly higher than those in other treatments(P0.05).Therefore,a relatively high Chinese milk vetch incorporation rate(≥30 Mg ha^-1)was more effective in improving the productivity and sustainability of paddy *** decreased coefficients of early-rice yield and the Chinese milk vetch incorporation rate in 2014 implied that the benefits of soil fertility and rice yield created by Chinese milk vetch input

关键词： Chinese milk vetch double-rice cropping system reduced chemical fertilizer sustainability

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Gas release characteristics during carbonization of iron coke hot briquette and influence of heating rate

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Journal of Iron and Steel Research International 2023年第11期30卷 2163-2172页

作者： Zi-yu Wang dong Han Zheng-gen Liu Man-sheng Chu Yong-jie Zhang Li-feng Zhang Ji-wei Bao Ming-yu Wang School of Metallurgy Northeastern UniversityShenyang110819LiaoningChina Engineering Research Center of Frontier Technologies for Low-Carbon Steelmaking(Ministry of Education) Shenyang110819LiaoningChina Liaoning Province Engineering Research Center for Technologies of Low-Carbon Steelmaking Shenyang110819LiaoningChina

The release characteristics of CH_(4),H_(2),CO and CO_(2) from iron coke hot briquette(ICHB)during carbonization were *** results show that compared with briquette without iron ore,Fe_(3)O_(4) can inhibit the release rate of H2 and promote the production of CO and CO_(2).In addition,when the heating rate increases from 3 to 7℃/min,the release rates of CH4 and H2 increase,while the release rates of CO and CO_(2) first increase and then *** carbonization process of ICHB was segmented,and corresponding kinetic analysis was carried *** results show that the activation energy of StageⅡand StageⅣis higher in the carbonization process of ICHB,and the active pyrolysis of coal and the reduction of iron ore occur in these two *** addition,the effect of heating rate on the kinetic parameters of ICHB carbonization process was *** was found that when the heating rate increased,the reaction activation energy of StageⅣdecreased first and then increased,which was consistent with the release law of CO and CO_(2).The analysis showed that the increase in heating rate leads to more reactions at higher temperatures,resulting in an increase in the release rate of some *** addition,thermal hysteresis can also cause some processes to fail to fully react at the end of *** is also found that the apparent activation energy and preexponential factor have kinetic compensation effect during the car-bonization of ICHB.

关键词： Iron coke hot briquette Carbonization Gas release characteristic Heating rate Kinetics

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Measurements of Wind Loads on Side-by-Side Semi-Submersibles in A Wind Tunnel

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China Ocean Engineering 2021年第4期35卷 531-543页

作者： dong Qing GUO xiao-xian YANG Jian-min LU Hai-ning HUANG Longwei State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University(SJTU)Shanghai 200240China SJTU Yazhou Bay Institute of Deepsea Technology Sanya 572000China

The multi-body system has been a popular form for offshore operations in terms of high *** wind effects are crucial which directly affect the relative positions of floating bodies and operating *** this study,the aerodynamic characteristics for two coupled semi-submersibles were analyzed in a wind tunnel to fill the gaps in literature related to the wind sheltering on offshore *** influences of separation distance were also *** to the results,substantial shielding effects were observed and wind forces on the shielded vessel decreased dramatically:a reduction in the transverse force could be up to 74%.Moreover,the longitudinal wind load was amplified by the platform abreast in a side-by-side *** expected,the interference level became more pronounced with a decreasing separation *** cases in which wind interaction decayed rapidly with distance,logarithmic functions were preferable for describing the relationship between *** linear fitting was reasonable for the transverse wind force when there was still evident sheltering at a quite large *** length of shielding area was another important factor that there was approximately a linear relationship between it and the shielding level for two platforms in close proximity at various wind attack *** on the two parameters,a preliminary wind loads estimation method considering shielding effects was *** approach can aid the industry to have a qualitative assessment of wind sheltering especially at early stages.

关键词： wind loads side-by-side shielding effect wind tunnel test

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柴油机Urea-SCR系统两相流及结晶的准一维数值模拟（英文）

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2016年第8期17卷 597-613页

作者： Xu-bo GAN dong-wei YAO Feng WU Jia-wei DAI Lai wei Xing-wen LI Institute of Power Machinery and Vehicular Engineering Zhejiang University

目的:对柴油机Urea-SCR系统还原剂添加过程进行建模,探讨SCR系统中尿素结晶的主要影响因素,研究排气温度、流量和尿素水溶液喷射速率等对结晶成分、位置和总结晶量的作用规律。创新点:1.考虑喷雾和壁膜内尿素热解过程的差异,分别采用尿... 详细信息

目的:对柴油机Urea-SCR系统还原剂添加过程进行建模,探讨SCR系统中尿素结晶的主要影响因素,研究排气温度、流量和尿素水溶液喷射速率等对结晶成分、位置和总结晶量的作用规律。创新点:1.考虑喷雾和壁膜内尿素热解过程的差异,分别采用尿素的直接分解和化学反应动力学方法对喷雾和壁膜内的尿素热解过程进行描述;2.提出一维壁膜的概念,将尿素热解的化学反应动力学模型嵌入一维壁膜中,实现对结晶成分、位置和总结晶量的计算。方法:1.采用欧拉方法求解气相流动以及拉格朗日方法跟踪喷雾运动,通过附加源项方式实现气液两相之间的耦合;2.对尿素水溶液喷雾的蒸发、热解、碰壁和结晶等过程进行建模,并对仿真结果进行验证;3.对SCR系统中尿素结晶进行仿真分析,对排气温度、流量和尿素水溶液喷射速率等影响因素进行变参数研究。结论:1.排气温度的降低可以减小壁膜范围以及结晶量;结晶成分与温度密切相关:当温度较低时,结晶以尿素为主,随着温度升高,缩二脲和三聚氰酸开始逐渐形成;2.尿素水溶液喷射速率会影响壁膜范围以及结晶量,但其对结晶成分影响不大;3.排气流量的增大能够促进排气与液滴以及排气管壁之间的传热,从而减小壁膜范围以及结晶量。

关键词：选择性催化还原系统(SCR) 两相流壁膜结晶成分一维模型

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A Barbier type reaction promoted by in situ formed active metal bismuth from NaBH_4 and BiCl_3 in aqueous media

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Chinese Journal of Chemistry 1996年第5期14卷 462-466页

作者： REN,Ping-Da PAN,Shi-Feng dong,Ting-wei WU,Shi-HuiDepartment of Chemistry,Pudan University,Shanghai 200433,China Department of Chemistry Fudan University Shanghai 200483 China

In the presence of active metal bismuth (Bi) which was prepared from the combination of bismuth trichloride and sodium borohydride,aldehydes have been found to react with allyl bromide in aqueous media,and the corresp... 详细信息

关键词： Barbier type reaction aqueous medium reaction active metal bismuth

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Topic Detection Based on Weak Tie Analysis： A Case Study of LIS Research

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Journal of Data and Information Science 2016年第4期1卷 81-101页

作者： Ling wei Haiyun Xu Zhenmeng Wang Kun dong Chao Wang Shu Fang Chengdu Documentation and Information Center Chinese Academy of SciencesChengdu 610041 China University of the Chinese Academy of Sciences Beijing 100049 China School of Information Management Shanxi University of Finance & EconomicsTaiyuan 030006 China

Purpose: Based on the weak tie theory, this paper proposes a series of connection indicators Acof weak tie subnets and weak tie nodes to detect research topics, recognize their connections, and understand their ***/methodology/approach: First, keywords are extracted from article titles and preprocessed. Second, high-frequency keywords are selected to generate weak tie co-occurrence networks. By removing the internal lines of clustered sub-topic networks, we focus on the analysis of weak tie subnets’ composition and functions and the weak tie nodes’ ***: The research topics’ clusters and themes changed yearly; the subnets clustered with technique-related and methodology-related topics have been the core, important subnets for years; while close subnets are highly independent, research topics are generally concentrated and most topics are application-related; the roles and functions of nodes and weak ties are *** limitations: The parameter values are somewhat inconsistent; the weak tie subnets and nodes are classified based on empirical observations, and the conclusions are not verified or compared to other *** implications: The research is valuable for detecting important research topics as well as their roles, interrelations, and evolution trends. Originality/value: To contribute to the strength of weak tie theory, the research translates weak and strong ties concepts to co-occurrence strength, and analyzes weak ties’ functions. Also, the research proposes a quantitative method to classify and measure the topics’ clusters and nodes.

关键词： Research topics Weak tie network Weak tie theory Weak tie nodes Library and Information Science(LIS)

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Role of selected criteria and preventive chemotherapy in tumor recurrence after liver transplantation

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Hepatobiliary & Pancreatic Diseases International 2020年第4期19卷 378-383页

作者： Mei-Xi Wang dong Chen Yuan-Yuan Zhao Bo Yang Ji-Pin Jiang Fan-Jun Zeng Lai wei Zhi-Shui Chen Institute of Organ Transplantation Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Key Laboratory of Organ Transplantation Ministry of EducationWuhan 430030China NHC Key Laboratory of Organ Transplantation Wuhan 430030China Key Laboratory of Organ Transplantation Chinese Academy of Medical SciencesWuhan 430030China

Background:Long-term survival after liver transplantation(LT)for hepatocellular carcinoma(HCC)patients remains poor because of tumor *** improve the prognosis of HCC patients after LT,we aimed to identify different transplantation criteria and risk factors related to tumor recurrence and evaluate the effect of preventive chemotherapy in a single ***:In total,data on 20 variables and the survival of 199 patients with primary HCC who underwent LT between 2005 and 2015 were included for *** patients were divided into the following three groups:Group 1,within the Milan and Hangzhou criteria(n=51);Group 2,beyond the Milan but within the Hangzhou criteria(n=36);and Group 3,beyond the Milan and Hangzhou criteria(n=112).Survival probabilities for the three groups were calculated using multivariate Cox regression *** association between preventive therapy and HCC-recurrence after LT was analyzed by multiple logistic regression ***:Child-Pugh stage C and hepatitis B virus(HBV)infection were independent risk factors for patients with tumor recurrence who did not meet the Milan *** overall survival rates of the 199 patients showed statistically significant differences among the three groups(P0.05).Multivariate logistic regression analysis showed that postoperative prophylactic chemotherapy reduced the risk of tumor recurrence in patients who did not meet the Hangzhou and Milan criteria(OR=0.478;95%CI:0.308–0.741;P=0.001).Conclusions:Child-Pugh classification and HBV infection were the independent risk factors of tumor recurrence in HCC patients with *** Hangzhou criteria were effective and analogous compared with the Milan *** chemotherapy significantly reduced the risk of recurrence and prolonged the survival time for HCC patients beyond the Milan and Hangzhou criteria after LT.

关键词： Hepatocellular carcinoma Liver transplantation Preventive chemotherapy Hangzhou criteria

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