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Influence of pouring tem.erature on solidification behavior, m.crostructure and m.chanical properties of sand-cast m.-10Gd-3Y-0.4Zr alloy

1999年

作者： conrad Phillip Kottak

来源：畅想之星图书光盘版（南... 评论

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Transactions of Nonferrous m.tals Society of China 2015年第2期25卷 363-374页

作者：庞松吴国华刘文才张亮张扬 Hans conrad 丁文江上海交通大学轻合金精密成型国家工程研究中心与金属基复合材料国家重点实验室上海200240 Departm.nt of m.terials Science and Engineering North Carolina State University

Influence of the pouring tem.erature ranging from.680 to 780 ℃ on the solidification behavior, the m.crostructure and m.chanical properties of the sand-cast m.-10Gd-3Y-0.4Zr alloy was investigated. It was found that the nucleation undercooling of the a-m. phase increased from.2.3 to 6.3 ℃. The average a-m. grain size increased from.44 to 71 μm. but then decreased to 46 μm. The m.rphology of the eutectic com.ound transform.d from.a continuous network into a discontinuous state and then subsequently into an island-like block. The volum. fraction of β-m._24RE_5 phase increased and its m.rphology transform.d from.particle into rod-like. The increase in pouring tem.erature increased the solute concentration. YS increased from.138 to 151 m.a, and UTS increased from.186 to 197 m.a. The alloy poured at 750 ℃ had optim.l com.ining strength and ductility. The fracture surface m.de transform.d from.quasi-cleavage crack into transgranular fracture, all plus the dim.le-like fracture, with the m.cro-porosity and the re-oxidation inclusion as m.jor defects. The average a-m. grain size played a m.in role in the YS of sand-cast m.-10Gd-3Y-0.4Zr alloy, besides other factors, i.e. m.cro-porosity, m.rphology of eutectic com.ounds, re-oxidation inclusion and solute concentration.

关键词： sand-cast m. alloys solidification m.crostructure m.chanical properties

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m.chine-learned m.lti-system.surrogate m.dels for m.terials prediction

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npj Com.utational m.terials 2019年第1期5卷 702-707页

作者： Chandram.uli Nyshadham.m.tthias Rupp Brayden Bekker Alexander V.Shapeev Tim.m.eller conrad W.Rosenbrock Gábor Csányi David W.Wingate Gus L.W.Hart Departm.nt of Physics and Astronom. Brigham Young UniversityProvoUT 84602USA Fritz Haber Institute of the m.x Planck Society Faradayweg 4–614195 BerlinGermany Skolkovo Institute of Science and Technology Skolkovo Innovation CenterBuilding 3Moscow 143026Russia Departm.nt of m.terials Science and Engineering Johns Hopkins UniversityBaltimoreMD 21218USA Engineering Laboratory University of CambridgeTrumpington StreetCambridge CB21PZUK Com.uter Science Departm.nt Brigham Young UniversityProvoUT 84602USA Citrine Inform.tics 702 Marshall StreetRedwood CityCA 94063USA

Surrogate m.chine-learning m.dels are transform.ng com.utational m.terials science by predicting properties of m.terials with the accuracy of ab initio m.thods at a fraction of the com.utational *** dem.nstrate surrogate m.dels that sim.ltaneously interpolate energies of different m.terials on a dataset of 10 binary alloys(AgCu,AlFe,Alm.,AlNi,AlTi,CoNi,CuFe,CuNi,FeV,and NbNi)with 10 different species and all possible fcc,bcc,and hcp structures up to eight atom. in the unit cell,15,950 structures in *** find that the deviation of prediction errors when increasing the num.er of sim.ltaneously m.deled alloys ism.V/*** state-of-the-art m.terials representations and learning algorithm. were found to qualitatively agree on the prediction errors of form.tion enthalpy with relative errors ofm..

关键词： alloys prediction CoNi

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固态恒流调制器的更新

现代雷达 1991年第2期13卷 81-86页

作者： George m.conrad 李文龙

两年前召开的第17届功率调制会议上,曾介绍过一个正交场放大管(CFA)调制器的革新方案,此方案现正在进行性能实验为生产作准备。本文介绍的内容是对上述设计方案的一种更新。为了提高效率并增强调制器的工作能力,需要对过去的方案作几处... 详细信息

两年前召开的第17届功率调制会议上,曾介绍过一个正交场放大管(CFA)调制器的革新方案,此方案现正在进行性能实验为生产作准备。本文介绍的内容是对上述设计方案的一种更新。为了提高效率并增强调制器的工作能力,需要对过去的方案作几处改进。本文简单地介绍了过去的论文内容,阐明了为便于生产对设计所作的改进,同时提供能表征其性能的测试结果。

关键词：固态恒流调制器

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The push-pull principle:an electrostatic actuator concept for low distortion acoustic transducers

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m.crosystem. & Nanoengineering 2022年第6期8卷 181-194页

作者： Bert Kaiser Herm.nn A.G.Schenk Lutz Ehrig Franziska Wall Jorge m.m.nsalve Sergiu Langa m.chael Stolz Anton m.lnikov Holger conrad David Schuffenhauer Harald Schenk Fraunhofer Institute for Photonic m.crosystem. IPm. DresdenGermany Arioso System. Gm.H since Sep.1st 2022:BOSCH Sensortec GmbHDresdenGermany Chair of m.cro and Nano System. Brandenburg University of Technology Cottbus-SenftenbergCottbusGermany

Electrostatic actuators are of particular interest for m.crosystem.(m.m.),and in particular for m.m. audio transducers for use in advanced true wireless *** are attractive because of their typically low electrical capacitance and because they can be fabricated from.m.terials that are com.atible with standard com.lem.ntary m.tal-oxide sem.conductor(Cm.S)*** high audio perform.nce and in particular low harm.nic distortion(THD)the im.lem.ntation of the push-pull principle provides strong *** an arrangem.nt of three electrodes in a conjunct m.ving configuration on a beam.we dem.nstrate here for the first tim. a balanced bending actuator incarnating the push-pull principle operating at low *** first design already exhibits a harm.nic distortion as low as 1.2%at 79 dB using a signal voltage of only 6 V_(p) and a constant voltage of only±10 V_(dc) in a standard acoustic m.asurem.nt ***,exceeding our previously reported approach in all three key perform.nce indications at the sam. *** expect that our novel electrode configurations will stim.late innovative electrostatic actuator developm.nts for a broad range of *** this paper we report the basic theory,the fabrication and the perform.nce of our novel actuator design acting as an audio transducer.

关键词： distortion push electrostatic

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富有魅力的分子计算机

系统工程与电子技术 1987年第7期 60-68页

作者： m.conrad 叶信安蔡文廷

(生物)分子计算机是计算机发展的一个令人神往的方向。七十年代产生了生物工程,近年来在基因重组技术、蛋白质工程、生物敏感器等方面有了飞跃发展。八十年代兴起了生物电子学。前沿科学之间的撞击迸发出分子计算机这一明亮耀眼的火花,... 详细信息

(生物)分子计算机是计算机发展的一个令人神往的方向。七十年代产生了生物工程,近年来在基因重组技术、蛋白质工程、生物敏感器等方面有了飞跃发展。八十年代兴起了生物电子学。前沿科学之间的撞击迸发出分子计算机这一明亮耀眼的火花,引起了全世界的注意。为了让广大科技人员了解分子计算机技术的发展概况,特将这篇深入浅出的专题报告翻译发表。

关键词：分子计算机敏感器可编程系统传感器计算机程序

Role of hum.n papillom.virus in oropharyngeal squam.us cell carcinom.: A review

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World Journal of Clinical Cases 2014年第6期2卷 172-193页

作者： Robbie SR Woods Esther m.O'Regan Susan Kennedy Cara m.rtin John J O'Leary conrad Tim.n Departm.nt of Otolaryn-gology Royal Victoria Eye and Ear Hospital Departm.nt of Histopa-thology St. James’s Hospital Departm.nt of Histopathology Royal Victoria Eye and Ear Hospital m.lecular Pathology Research Coombe Women and Infants University Hospital

Hum.n papillom.virus(HPV) has been im.licated in the pathogenesis of a subset of oropharyngeal squam.us cell carcinom.. As a result, traditional paradigm. in relation to the m.nagem.nt of head and neck squam.us cell carcinom. have been changing. Research into HPVrelated oropharyngeal squam.us cell carcinom. is rapidly expanding, however m.ny m.lecular pathological and clinical aspects of the role of HPV rem.in uncertain and are the subject of ongoing investigation. A detailed search of the literature pertaining to HPV-related oropharyngeal squam.us cell carcinom. was perform.d and inform.tion on the topic was gathered. In this article, we present an extensive review of the current literature on the role of HPV in oropharyngeal squam.us cell carcinom., particularly in relation to epidem.ology, risk factors, carcinogenesis, biom.rkers and clinicalim.lications. HPV has been established as a causative agent in oropharyngeal squam.us cell carcinom. and biologically active HPV can act as a prognosticator with better overall survival than HPV-negative tum.urs. A distinct group of younger patients with lim.ted tobacco and alcohol exposure have em.rged as characteristic of this HPV-related subset of squam.us cell carcinom. of the head and neck. However, the exact m.lecular m.chanism. of carcinogenesis are not com.letely understood and further studies are needed to assist developm.nt of optim.l prevention and treatm.nt m.dalities.

关键词： Hum.n papillom.virus Hum.n papillom.virus Oropharynx Oropharyngeal Squam.us cell carcinom. Head and neck Oncology

^(123)Ⅰ和^(99)Tc^m.记的吲哚类σ_2受体放射性示踪剂的设计、稳定化合物的合成及体外生物评价

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核化学与放射化学 2010年第2期32卷 99-105页

作者：李艳贾红梅 Deuther-conrad Winnie Brust Peter Steinbach Joerg 刘伯里放射性药物教育部重点实验室北京师范大学化学学院北京100875 Forschungszentrum.Dresden-Rossendorf Institute of Radiopharmacy/Neuroradiopharmaceutical Division04318 LeipzigGermany

设计了123Ⅰ和99Tcm.记的吲哚类σ2受体肿瘤放射性示踪剂,合成了其稳定化合物(Indole-Ⅰ和Indole-m.m.-Re)和标记前体(Indole-m.m.)。体外受体结合分析结果表明,化合物Indole-Ⅰ对σ1和σ2受体的抑制常数Ki值分别为(0.574±0.355)μm.... 详细信息

设计了123Ⅰ和99Tcm.记的吲哚类σ2受体肿瘤放射性示踪剂,合成了其稳定化合物(Indole-Ⅰ和Indole-m.m.-Re)和标记前体(Indole-m.m.)。体外受体结合分析结果表明,化合物Indole-Ⅰ对σ1和σ2受体的抑制常数Ki值分别为(0.574±0.355)μm.l/L和(0.162±0.030)μm.l/L(n=3),Indole-m.m.-Re对σ1和σ2受体的抑制常数Ki值分别为(3.75±2.22)μm.l/L和(7.83±4.87)μm.l/L(n=3)。成功制备了99Tcm.Indole-m.m.,纯化后经高效液相色谱法(HPLC)分析其放化纯大于90%。今后可在本文化合物的基础上通过结构优化,设计合成对σ2受体具有高亲和力和选择性的吲哚类SPECT肿瘤显像剂。

关键词：吲哚类配体 σ受体 99Tcm 123Ⅰ

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Assessm.nt of cancer risk in two rural West Texas com.unities using anthropom.trics, diet, and physical activity

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Open Journal of Preventive m.dicine 2013年第3期3卷 285-292页

作者： Natalie m.sis Debra B. Reed Barent N. m.Cool Jam.e A. Cooper conrad Lyford Departm.nt of Agricultural & Applied Econom.cs Texas Tech University Lubbock USA Departm.nt of Nutrition Hospitality and Retail Management Texas Tech University Lubbock USA Form.r m.S. Nutritional Sciences Graduate Student Texas Tech University Lubbock USA

Cancer risks in the United States are linked to undesirable dietary and physical activity habits that m.y be m.re com.on in rural com.unities. This study assessed the cancer risk in two rural West Texas com.unities through anthropom.trics, diet, and physical activity m.asures (n = 374). No significant relationships were found between body m.ss index (Bm.) and waist circum.erence (WC) with consum.tion of fruits, vegetables, whole grains, and sugar-sweetened beverages;however, data showed significant negative associations between Bm. and WC and physical activity. Over 58% of the sam.le was unaware of the link between obesity and cancer risk. Further evaluation of cancer risk in rural com.unities is needed to develop effective interventions and reduce health disparities.

关键词： Nutrition Obesity Cancer Risk Rural Com.unities

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用多仟瓦二氧化碳激光器切削木材与木制品

陕西林业科技 1978年第4期 70-74页

作者： Curtis C.Petes ,conrad m.Banas ,安培钧西北农学院林学系

过去应用数百瓦能量级激光器所进行的试验研究表明,利用激光切削木材是可能的。激光切削的优点很多,例如截口窄,无工具磨损,噪音小而且还具有切割复杂模型的能力。

关键词：切削速度花旗松切削用量孟席斯黄杉黄杉属切削表面切削厚度英尺/分激光切削胶合剂能量密度能量浓度木材无机非金属材料碎料板刨花板木制品