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板簧支座切边模设计

模具技术 2011年第6期 30-32页

作者：邱庚龙江铃底盘股份有限公司江西抚州344000

在弯曲90°角时,为使弯曲时有足够长的弯曲力臂,必须使弯曲高度H>2t。当H<2t时,可开槽后弯曲,或增加直边高度,弯曲后再去掉。通过对板材弯曲高度H<2t时,采用切边方法分析,介绍了切边模结构、模具的设计要点和其工作过程。实践证明,模具... 详细信息

在弯曲90°角时,为使弯曲时有足够长的弯曲力臂,必须使弯曲高度H>2t。当H<2t时,可开槽后弯曲,或增加直边高度,弯曲后再去掉。通过对板材弯曲高度H<2t时,采用切边方法分析,介绍了切边模结构、模具的设计要点和其工作过程。实践证明,模具结构合理,易于生产和维修,提高了生产效率。

关键词：切边模工艺设计定位装置夹紧装置

On the thermodynamics of plasticity during quasi-isentropic compression of metallic glass

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Matter and Radiation at Extremes 2024年第2期9卷 74-89页

作者： Kaiguo Chen Bo Chen Yinan Cui Yuying Yu Jidong Yu Huayun geng Dongdong Kang Jianhua Wu Yao Shen Jiayu Dai College of Science National University of Defense TechnologyChangsha 410073People’s Republic of China Hunan Key Laboratory of Extreme Matter and Applications National University of Defense TechnologyChangsha 410073People’s Republic of China Applied Mechanics Laboratory Department of Engineering MechanicsSchool of AerospaceTsinghua UniversityBeijing 100084People’s Republic of China Institute of Fluid Physics China Academy of Engineering PhysicsMianyangPeople’s Republic of China Department of Material Science and Technology Shanghai Jiao Tong UniversityShanghaiPeople’s Republic of China

Entropy production in quasi-isentropic compression (QIC) is critically important for understanding the properties of materials under extremeconditions. However, the origin and accurate quantification of entropy in this situation remain long-standing challenges. In this work, a framework is established for the quantification of entropy production and partition, and their relation to microstructural change in QIC. Cu50Zr50is taken as a model material, and its compression is simulated by molecular dynamics. On the basis of atomistic simulation-informed physicalproperties and free energy, the thermodynamic path is recovered, and the entropy production and its relation to microstructural change aresuccessfully quantified by the proposed framework. Contrary to intuition, entropy production during QIC of metallic glasses is relativelyinsensitive to the strain rate ˙γ when ˙γ ranges from 7.5 × 10^(8) to 2 × 10^(9)/s, which are values reachable in QIC experiments, with a magnitudeof the order of 10^(−2)kB/atom per GPa. However, when ˙γ is extremely high (>2 × 10^(9)/s), a notable increase in entropy production rate with˙γ is observed. The Taylor–Quinney factor is found to vary with strain but not with strain rate in the simulated regime. It is demonstrated thatentropy production is dominated by the configurational part, compared with the vibrational part. In the rate-insensitive regime, the increase inconfigurational entropy exhibits a linear relation to the Shannon-entropic quantification of microstructural change, and a stretched exponential relation to the Taylor–Quinney factor. The quantification of entropy is expected to provide thermodynamic insights into the fundamentalrelation between microstructure evolution and plastic dissipation.

关键词： entropy metallic regime

润燥止痒胶囊联合氢考尿素霜治疗神经性皮炎的疗效观察

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中国皮肤性病学杂志 2009年第7期23卷 457-459页

作者：周鸿波季永智耿龙中国医科大学附属第一医院辽宁沈阳110001 辽宁中医药大学职业技术学院辽宁沈阳110101

目的观察润燥止痒胶囊联合氢考尿素霜治疗神经性皮炎的疗效。方法将55例患者随机分为治疗组40例,按照中医诊断辩证标准分为风湿蕴肤证16例(A1组)与血虚风燥证24例(A2组);对照组15例。治疗组均采用润燥止痒胶囊口服,同时外用氢考尿素霜;... 详细信息

目的观察润燥止痒胶囊联合氢考尿素霜治疗神经性皮炎的疗效。方法将55例患者随机分为治疗组40例,按照中医诊断辩证标准分为风湿蕴肤证16例(A1组)与血虚风燥证24例(A2组);对照组15例。治疗组均采用润燥止痒胶囊口服,同时外用氢考尿素霜;对照组单独外用氢考尿素霜。连续治疗4周。结果治疗组有效率为85.0%,对照组为53.3%,两组比较差异有显著性(P<0.05)。治疗组中血虚风燥证有效率高于风湿蕴肤证,其临床痊愈率和显效率也较高。结论润燥止痒胶囊联合氢考尿素霜治疗神经性皮炎疗效确切,以血虚风燥型者疗效更好。

关键词：润燥止痒胶囊神经性皮炎疗效

基于物联网的“两光源互补”隧道照明智能控制系统设计

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公路 2020年第7期65卷 326-330页

作者：李准耿龙海郭永刚西藏农牧学院林芝市860000

针对西藏地区拉林高速上的米拉山某隧道,设计了基于物联网的"两光源互补"隧道照明智能控制系统。系统通过传感器采集隧道内外的光照强度、车速、温度及交通量,数据通过物联网上传到终端,控制器结合外界光照强度、交通量预测曲线、隧道... 详细信息

针对西藏地区拉林高速上的米拉山某隧道,设计了基于物联网的"两光源互补"隧道照明智能控制系统。系统通过传感器采集隧道内外的光照强度、车速、温度及交通量,数据通过物联网上传到终端,控制器结合外界光照强度、交通量预测曲线、隧道照明光照强度曲线标准,智能控制隧道内LED灯亮度;系统增加了追踪太阳光输送模块,通过光纤把太阳光导入到隧道内,补充隧道内的亮度,达到节能减排的目的。

关键词：隧道照明物联网光纤智能控制

longitudinal changes in body weight of breastfeeding mothers in the first year after delivery and its relationship with human milk composition:a combined longitudinal and cross-sectional cohort study

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Food Science and Human Wellness 2024年第1期13卷 254-264页

作者： Huijuan Ruan Yajie Zhang Qingya Tang Xuan Zhao Xuelin Zhao Yi Xiang Wei geng Yi Feng Wei Cai Department of Clinical Nutrition Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200092China Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition Shanghai Institute of Pediatric ResearchShanghai 200092China Department of Pediatric Surgery Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200092China

Objective:Postpartum weight retention(PPWR)is a common problem among women after *** main objectives of this study are to understand the changes in body weight of breastfeeding mothers during long-term follow-up and preliminarily explore the relationship between maternal body weight and human milk composition,including macronutrients,leptin,and ***:The study included a longitudinal cohort(122 mothers),and a cross-sectional cohort(37 mothers).The human milk,maternal weight,and dietary surveys were collected in the longitudinal cohort at different follow-up time points(1-14 days postpartum,2-4 months postpartum,5-7 months postpartum,and 12-17 months postpartum).The maternal body weight was analyzed using the responses in the survey questionnaires.A milk analyzer based on the mid-infrared spectroscopy(MIRS)was used to determine milk composition,and nutrition analysis software evaluated dietary *** the cross-sectional cohort,participating mothers were asked to provide blood and human milk samples and pertinent information related to maternal body *** body composition was measured by bioelectrical impedance analysis(BIA),while ELISA analyzed leptin and adiponectin in milk and ***:At 5-7 months postpartum,the PPWR of breastfeeding mothers was(2.46±3.59)*** 12-17 months postpartum,the PPWR was(0.98±4.06)*** was found to be negatively correlated with milk fat content within 14 days postpartum and positively correlated at 2-4 months *** addition,the maternal weight and body muscle mass were positively correlated with leptin and adiponectin in *** leptin was positively correlated with the mother’s body weight,body mass index(BMI),FAT percentage,and body fat mass,while plasma adiponectin did not correlate with any *** results also indicate that the PPWR did not correlate with leptin and adiponectin in plasma or ***:Breastfeeding mothers may retain considerable weight gai

关键词： Human milk Milk composition Body weight Body mass index(BMI) Weight gain Postpartum weight retention

Antimony oxides-protected ultrathin Ir-Sb nanowires as bifunctional hydrogen electrocatalysts

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Nano Research 2024年第3期17卷 1042-1049页

作者： Bingyan Xu Xuan Huang Shangheng Liu Zhiwei Hu Cheng-Wei Kao Ting-Shan Chan Hongbo geng Ying Zhang Xiaoqing Huang Country State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Max Planck Institute for Chemical Physics of Solids Dresden 01187Germany “National Synchrotron Radiation Research Center” Hsinchu 30076TaiwanChina School of Materials Engineering Changshu Institute of TechnologyChangshu 215500China Institute for Carbon Neutralization College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325035China

Developing electrocatalysts with fast kinetics and long-term stability for alkaline hydrogen oxidation reaction(HOR)and hydrogen evolution reaction(HER)is of considerable importance for the industrial production of green and sustainable ***,an ultrathin Ir-Sb nanowires(Ir-Sb NWs)protected by antimony oxides(SbO_(x))was synthesized as an efficient bifunctional catalyst for both HOR and HER under alkaline *** from the much higher mass activities of Ir-Sb nanowires than those of Ir nanowires(Ir NWs)and commercial Pt/C,the SbO_(x) protective layer also contributes to the maintenance of morphology and anti-CO poisoning ability,leading to the long-term cycling performance in the presence of ***,the Ir-Sb NW/SbO_(x) exhibits the highest catalytic activities,which are about 3.5 and 4.8 times to those of Ir NW/C and commercial Pt/C toward HOR,*** work provides that the ultrathin morphology and H_(2)O-occupied Sb sites can exert the intrinsic high activity of Ir and effectively optimize the absorption of OH*both in alkaline HER/HOR electrolysis.

关键词： Ir nanowire amorphous antimony oxides bifunctional mechanism hydrogen evolution reaction hydrogen oxidation reaction

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嵌入式实时内存数据库恢复子系统的设计

计算机工程与应用 2004年第17期40卷 179-180,207页

作者：龙玉国耿协坚华中科技大学计算机学院武汉430074

首先分析了嵌入式实时环境的特点,以及需要考虑的问题。然后根据分析,为嵌入式实时环境下运行的内存数据库管理系统设计了一个恢复子系统,包括日志、检验点、备份、恢复处理4个方面,并进行了讨论。

关键词：模糊检验点模糊备份恢复内存数据库嵌入式

黄色鲤、蓝色鲤、红色鲤杂交的体色及鳞被遗传特性

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动物学杂志 2010年第5期45卷 9-17页

作者：徐伟李池陶曹顶臣耿龙武中国水产科学研究院黑龙江水产研究所哈尔滨150070

进行黄色鲤(Cyprinus carpio)、蓝色鲤及红色鲤的自交和杂交试验,统计分析子代的体色及鳞被分离情况。结果表明,实验选择的亲本,红色鲤的体色和鳞被都是纯合基因型;蓝色鲤的体色是纯合型,鳞被是杂合型;黄色鲤的体色和鳞被都是杂合型。... 详细信息

进行黄色鲤(Cyprinus carpio)、蓝色鲤及红色鲤的自交和杂交试验,统计分析子代的体色及鳞被分离情况。结果表明,实验选择的亲本,红色鲤的体色和鳞被都是纯合基因型;蓝色鲤的体色是纯合型,鳞被是杂合型;黄色鲤的体色和鳞被都是杂合型。它们彼此杂交的体色遗传规律较复杂,子代中不但具有亲本的红、黄、蓝体色,还出现了其他色彩,如青灰色、白色、青黄色和蓝白色,部分红色个体的背部还呈暗黑色。同时,实验还观察了不同体色鲤的鳞片、鳍条色素细胞分布情况,分析和讨论了鲤杂交的体色遗传特性。

关键词：鲤体色鳞被遗传

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基于FSC的悬架优化设计

机械设计与制造 2022年第10期380卷 153-156,160页

作者：耿龙伟谢晟刘玮林鑫焱盐城工学院汽车工程学院江苏盐城224002 盐城市沿海新能源汽车科技有限公司江苏盐城224007

大学生电动方程式汽车大赛是教育性质的汽车赛事,悬架的性能决定了赛车的动态性能。针对某大学生电动方程式赛车历年来的设计经验,从轮胎轮辋选型、几何参数设计计算,刚度阻尼计算及减振器的确定等着手进行悬架系统设计,并采用计算机虚... 详细信息

大学生电动方程式汽车大赛是教育性质的汽车赛事,悬架的性能决定了赛车的动态性能。针对某大学生电动方程式赛车历年来的设计经验,从轮胎轮辋选型、几何参数设计计算,刚度阻尼计算及减振器的确定等着手进行悬架系统设计,并采用计算机虚拟仿真技术进行几何与结构优化。结果表明:在抗点头率、车轮定位参数、悬架几何和偏频刚度、阻尼均在合理的设计范围情况下,强度、性能均大幅提升,立柱和轮毂分别减重22.06%和25.12%,整车质量大幅下降,取得较好的轻量化效果。

关键词：大学生电动方程式汽车悬架强度轻量化