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Formation of L1_(0)-FeNi hard magnetic material from FeNi-based amorphous alloys

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Chinese Physics B 2022年第4期31卷 538-544页

作者： Yaocen Wang Ziyan hao yan Zhang Xiaoyu Liang Xiaojun Bai Chongde Cao School of Physical Science and Technology Northwestern Polytechnical UniversityXi’an 710072China Innovation Center of Northwestern Polytechnical University in Chongqing Chongqing 401135China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China Institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendai 980-8577Japan

L1_(0)-FeNi hard magnetic alloy with coercivity reaching 861 Oe was synthesized through annealing Fe_(42)Ni_(41.3)Si_8 B_(4)P_(4)Cu_(0.7)amorphous alloy,and the L1_(0)-FeNi formation mechanism has been *** is found the L1_(0)-FeNi in annealed samples at 400℃mainly originated from the residual amorphous phase during the second stage of crystallization which could take place over 600 C lower than the measured onset temperature of the second stage with a50 C/min heating *** at 4000 C after fully crystallization still caused a slight increase of coercivity,which was probably contributed by the limited transformation from other high temperature crystalline phases towards L1_(0)phase,or the removal of B from L1_(0)lattice and improvement of the ordering quality of L1_(0)phase due to the reduced temperature from520℃to 400℃.The first stage of crystallization has hardly direct contribution to L1_(0)-FeNi *** initio simulations show that the addition of Si or Co in L1_(0)-FeNi has the effect of enhancing the thermal stability of L1_(0)phase without seriously deteriorating its magnetic *** non-monotonic feature of direction dependent coercivity in ribbon segments resulted from the combination of domain wall pinning and demagnetization *** approaches of synthesizing L1_(0)-FeNi magnets by adding Si or Co and decreasing the onset crystallization temperature have been discussed in detail.

关键词： L1_(0)-FeNi hard magnetic materials amorphous alloys ab initio simulation

基于Vpython的黏滞阻力作用下的物体运动仿真模拟

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大学物理 2024年第7期43卷 63-68,84页

作者：曲浩然刘玉颖赵志超赵云何志巍中国农业大学工学院机械工程系北京100083 中国农业大学理学院应用物理系北京100083 中国农业大学本科生院北京100083

大学物理教学中,黏滞阻力和终极速度是牛顿运动定律应用中很重要的概念内容.本文中我们首先对黏滞阻力和终极速度知识点进行比较与分析,进而应用Vpython软件对黏滞阻力作用下多种物体(蒲公英的种子、篮球、神舟飞船)的运动进行了仿真模... 详细信息

大学物理教学中,黏滞阻力和终极速度是牛顿运动定律应用中很重要的概念内容.本文中我们首先对黏滞阻力和终极速度知识点进行比较与分析,进而应用Vpython软件对黏滞阻力作用下多种物体(蒲公英的种子、篮球、神舟飞船)的运动进行了仿真模拟;有趣的是,在恒定质量基础上,我们还研究了变质量物体在黏滞阻力作用下的运动,例如对空中下落的质量不断变化的雨滴进行了理论分析和仿真模拟,结果表明:变质量的雨滴会趋近于一个终极速度,雨滴的半径大小不同、终极速度也不同;仿真模拟深化了对课本知识的理解.

关键词：黏滞阻力终极速度牛顿第二定律 Vpython

长距离输水工程数字孪生模型数据融合及编码技术研究

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水利与建筑工程学报 2024年第2期22卷 12-18页

作者：潘志权闫飞贾东远刘晨周超陈晨咏广东粤港供水有限公司广东深圳518000 长江勘测规划设计研究有限责任公司湖北武汉430010 滨水空间规划设计湖北省工程研究中心湖北武汉430010 粤海水资源工程研究中心(广东)有限公司广东深圳518000

针对长距离输水工程在数字孪生工程数据底板建设过程中GIS与BIM等多源数据融合及编码体系不完善的问题,通过分析长距离输水工程设施数字孪生模型建立方法和编码特点,开展BIM模型和倾斜摄影三维实景模型建立与融合方法、水工设施KKS编码... 详细信息

针对长距离输水工程在数字孪生工程数据底板建设过程中GIS与BIM等多源数据融合及编码体系不完善的问题,通过分析长距离输水工程设施数字孪生模型建立方法和编码特点,开展BIM模型和倾斜摄影三维实景模型建立与融合方法、水工设施KKS编码方法和基于Dynamo的快速编码技术的研究。研究结果及工程应用表明,基于Cesium的BIM模型和倾斜摄影模型融合能够实现精细化三维场景模型构建和长距离输水工程数据信息共享。将KKS编码拓展到水工设施编码,形成的数字化编码库,有利于水工设施与机电设备编码的高效和统一管理。利用Dynamo自动编码技术,可快速实现设施设备快速编码,提升了长距离输水工程设施运维管理的数字化与智能化程度,为后续数字孪生延伸应用奠定基础。

关键词：长距离输水工程建筑信息模型(BIM) 数字孪生 KKS编码地理信息系统(GIS)

Will male semen quality improve with environmental quality?

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Asian Journal of Andrology 2023年第2期25卷 252-258页

作者： Xu-chao Dai Meng-Qi Zhang Gang Chen Kun Mei yan-Long Liu Hong Huang Zhi-Gang Wu School of Public Health and Management Wenzhou Medical UniversityWenzhou 325035China School of Geography Science and Geomatics Engineering Suzhou University of Science and TechnologySuzhou 215009China School of Mental Health Wenzhou Medical UniversityWenzhou 325035China Research Center for Healthy China Wenzhou Medical UniversityWenzhou 325035China Zhejiang Provincial Key Laboratory of Watershed Sciences and Health Wenzhou 325035China Department of Urology The First Affiliated Hospital of Wenzhou Medical UniversityWenzhou 325000China Reproductive Health Research Center Health Assessment Center of Wenzhou Medical UniversityWenzhou 325000China

Wenzhou has improved its environmental quality because of comprehensive environmental remediation;nevertheless,the semen quality of infertile males remains *** study determined whether better environmental quality improved semen quality in this *** recorded semen quality data from 22962 infertile males from January 2014 to November 2019 at the Center for Reproductive Health of The First Affiliated Hospital of Wenzhou Medical University(Wenzhou,China).Patients were predominantly 30–35 years old(33.1%)and workers(82.0%),with high school education or lower(77.6%);more than a half of the patients(52.6%)were Wenzhou household registration;and most patients(77.5%)had abnormal semen *** who were older than 40 years and workers,and those with Wenzhou household registration,had significantly worse semen quality(all P<0.05).From 2014 to 2019,progressive sperm motility,total sperm motility,and semen volume showed increasing linear trends in all patients(P=0.021,0.030,and 0.005,respectively),yet normal sperm morphology showed a linearly decreasing trend(P=0.046).Sensitivity analyses for subgroups yielded similar *** conclusion,the improvement of environmental quality and better function of the accessory glands are associated with progressive sperm motility,total sperm motility,and semen *** sperm morphology is influenced by occupational exposures and personal lifestyle and does not improve with environmental quality.

关键词： environmental quality male infertility semen quality time trend

Does an extended mediastinal lymphadenectomy improve outcome after R0 resection in lung cancer?

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Chinese Journal of Cancer Research 2014年第2期26卷 183-191页

作者： Nan Wu Shi yan chao Lv Shaolei Li Yuan Feng Yuzhao Wang Jia Wang Qingfeng Zheng Yue yang Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education) Department of Thoracic Surgery II Peking University Cancer Hospital & Institute

Objective： This retrospective study was conducted to investigate the impact of more extended mediastinal lymphadenectomy on the outcome of lung cancer patients treated with R0 resection. Methods： During the investigation period, 325 lung cancer cases were enlisted and 278 cases entered the analysis. The patients were divided into Control group （n=116） and Research group （n=162） according to the different extents of mediastinal lymph node clearance at different time periods. Three major parameters were retrospectively assessed to compare the quality of surgical care： extent of lymph node clearance, resection volume, and postoperative recovery process and common complications. Comparison of the outcome between two groups was carried out. Results： Research group showed a significant quality improvement of lymphadenectomy, such as more mediastinal node stations investigated （more than 3 N2 stations investigated： Research group, 90.7% vs. Control group, 55.2%; P=0.001） and more nodes collection （total nodes 26.1±10.0 vs. 19.1±8.3, P=0.000; N2 nodes 15.5±7.2 vs. 9.8±5.6, P=0.000）. However, overall survival （OS） and disease-free survival （DFS） were not significantly different either between two groups （5-year OS： Control group, 56.4±4.6% vs. Research group, 62.6±4.3%; P=0.271） or between subgroups from stage I to IIIa. TNM stage and histology were significant factors associated with OS and DFS in multivariate analysis; extent of mediastinal lymphadenectomy was not associated with OS or DFS. Conclusions： More radical mediastinal lymphadenectomy may not lead to an improved oncological outcome for lung cancer treated with R0 resection.

关键词： Lung cancer lymphadenectomy outcome quality

Deep soil microbial carbon metabolic function is important but often neglected:a study on the Songnen Plain reed wetland,Northeast China

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Fundamental Research 2023年第6期3卷 833-843页

作者： Zhen-Di Liu yan-Yu Song Xiu-yan Ma Jia-Bao Yuan yan-Jing Lou Chen yang hao-Ran Tang Chang-Chun Song Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102China University of Chinese Academy of Sciences Beijing 100049China Xi'an University of Architecture and Technology Xi'an 710055China School of Hydraulic Engineering Dalian University of TechnologyDalian 116024China

Soil microbial carbon metabolism is critical in wetland soil carbon cycling,and is also a research hotspot at ***,most studies focus on the surface soil layer in the wetlands and the microorganisms associated with this *** this study,0-75 cm soil profiles were collected from five widely separated reed wetlands in the Songnen Plain,which has a large number of middle-high latitude inland saline-sodic *** Biolog-ECO method was used to determine the carbon metabolic activity and functional diversity of soil *** results showed that soil carbon metabolic activity decreased with increasing soil *** carbon metabolic activity of soil microorganisms in the 60-75 cm layer was approximately 57.41%-74.60%of that in the 0-15 cm *** soil microbial Shannon index and utilization rate of amines decreased with an increase in soil depth,while the Evenness index and utilization rate of polymers tended to increase with soil *** organic carbon(DOC)is the most important factor affecting microbial carbon source utilization preference,because microorganisms mainly obtain the carbon source from *** result of the correlation analysis showed that the soil microbial carbon metabolic activity,Shannon index,and Evenness index significantly correlated with soil total carbon(TC),microbial biomass carbon(MBC),DOC,total nitrogen(TN),ammonium nitrogen(NH_(4)^(+)-N),nitrate nitrogen(NO_(3)_(−)-N)contents,and electrical conductivity(EC).This study emphasized the important role of microbial carbon metabolic function in deep soil.

关键词： Soil profiles Soil microbial functional diversity Biolog-ECO Substrate utilization Wetland

两样本孟德尔随机化研究肥胖与男性不育症的因果关系

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中华男科学杂志 2024年第4期30卷 306-314页

作者：李智超滕志海韩振伟张艳平金成根王亚轩河北医科大学第二医院泌尿外科河北石家庄050000

目的:通过孟德尔随机化(MR)研究阐明肥胖与男性不育症(MI)之间的因果关系。方法:进行双样本MR分析,以评估遗传预测的体质量指数(BMI)与MI风险的因果关联。暴露因子为BMI(n;病例组;=99998,n;对照组;=12746)。MI的遗传信息来自一项全基因... 详细信息

目的:通过孟德尔随机化(MR)研究阐明肥胖与男性不育症(MI)之间的因果关系。方法:进行双样本MR分析,以评估遗传预测的体质量指数(BMI)与MI风险的因果关联。暴露因子为BMI(n;病例组;=99998,n;对照组;=12746)。MI的遗传信息来自一项全基因组关联研究(GWAS),该研究包含73479例欧洲人。在单变量孟德尔随机化研究(UVMR)分析中,将逆方差加权法(IVW)作为主要方法,MR-Egger回归模型和加权中值估计模型作为因果推断的补充方法。其次,运用多种敏感性分析方法来验证MR结果的稳健性,包括Cochran's Q检验、MR-Egger截距检验、MR-PRESSO、留一法检验和漏斗图。为了评估BMI对MI风险的直接因果效应,进行多变量孟德尔随机化研究(MVMR)。结果:UVMR发现遗传预测BMI与MI风险增加之间存在因果关系(OR:1.237,95%CI:1.090~1.404,P=0.001)。敏感性分析发现,目前的研究几乎不存在偏倚(P>0.05)。在调整2型糖尿病、饮酒和吸烟等危险因素后,MVMR进一步证实遗传预测的BMI对MI风险增加有直接影响(P均<0.05)。结论:两样本MR研究表明,遗传预测的BMI可能与MI风险增加之间存在因果关系。未来的研究可基于这一发现,进一步探讨肥胖与MI两者之间因果关系的具体机制,为预防和治疗提供新途径。

关键词：肥胖体质量指数因果关系男性不育症孟德尔随机化研究

蒸黄精粉末颜色与显微特征颜色及果糖含量的相关性研究

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时珍国医国药 2024年第5期35卷 1142-1146页

作者：邢玥陈鑫凤蔡梅超孔庆悦李浩然庄梓鸣赵鑫张学兰山东中医药大学药学院山东济南250355

目的探究蒸黄精粉末颜色、显微特征颜色及果糖含量的相关性。方法基于10批蒸黄精饮片样本,利用色差法测定粉末颜色值,利用显微成像技术测定显微特征颜色信息,采用HPLC-ELSD法测定果糖含量,运用Pearson相关性分析法分析粉末颜色、显微特... 详细信息

目的探究蒸黄精粉末颜色、显微特征颜色及果糖含量的相关性。方法基于10批蒸黄精饮片样本,利用色差法测定粉末颜色值,利用显微成像技术测定显微特征颜色信息,采用HPLC-ELSD法测定果糖含量,运用Pearson相关性分析法分析粉末颜色、显微特征颜色及果糖含量之间的相关性。结果蒸黄精粉末L^(*)值与表皮细胞和黏液细胞的L^(*)、E_(ab)^(*)值,导管的b^(*)、E_(ab)^(*)值及草酸钙针晶E_(ab)^(*)值呈显著正相关(P<0.05,P<0.01);蒸黄精粉末b^(*)值与草酸钙针晶b^(*)值呈显著正相关(P<0.01);蒸黄精粉末E_(ab)^(*)值与表皮细胞和黏液细胞的L^(*)、E_(ab)^(*)值和导管的b^(*)、E_(ab)^(*)值及草酸钙针晶E_(ab)^(*)值呈显著正相关(P<0.05,P<0.01);蒸黄精中果糖含量与其粉末、表皮细胞、黏液细胞的L^(*)、E_(ab)^(*)值及导管的b^(*)、E_(ab)^(*)值呈显著负相关(P<0.05,P<0.01)。结论蒸黄精粉末颜色和显微特征颜色及果糖含量之间存在一定的相关性,为蒸黄精饮片的质量评价提供了科学依据。

关键词：蒸黄精粉末颜色显微特征颜色色差法显微成像技术果糖 Pearson相关性分析

Crosstalk of cold and gibberellin effects on bolting and flowering in flowering Chinese cabbage

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Journal of Integrative Agriculture 2019年第5期18卷 992-1000页

作者： SONG Shi-wei LEI Yu-ling HUANG Xin-min SU Wei CHEN Ri-yuan hao yan-wei College of Horticulture South China Agricultural University

The flower stalk is the product organ of flowering Chinese cabbage(Brassica campestris *** *** Tsen et Lee),which is cultivated extensively in South *** stalk formation and development,including bolting and flowering,determine the yield of flowering Chinese cabbage;however,the bolting and flowering mechanisms remain to be *** elucidate these processes,we studied the effects of low-temperature and gibberellin(GA)treatments,and their interaction,on stem elongation,bolting time,flowering time,hormone content,and cell morphology in stem of flowering Chinese *** results showed that both cold and GA treatments accelerated bolting time,stem elongation,and flowering ***,cold and GA cotreated plants displayed additive positive *** addition,cold treatments increased the GA,indole-3-acetic acid,and cytokinin contents and altered cell size in the shoot apices of flowering Chinese *** with uniconazole,a GA synthesis inhibitor,strongly delayed bolting time,stem elongation,and flowering time,whereas GA,but not cold treatment,rescued this inhibition,indicating that low temperature accelerates bolting and flowering not only through inducing GA in the shoot apices,but also other *** results provide a theoretical basis for further dissecting the regulatory mechanism of bolting and flowering in flowering Chinese cabbage.

关键词： bolting flowering stem elongation cold gibberellin