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13篇 您的检索式:作者名="astro"
    题名 作者 年代 出处 被引量
1Neu tralizing an tibodies to enterovirus71 in Belem,Brazil显示文摘GomesML deC astro CM OliVeiraM J 2002Mem In stOswaldo Cruz2002,97,1:1
2Lead and Cu in contaminated urban soils:Extraction with chemical reagents and bioluminescentbacteria and yeast显示文摘Pasi Peltola Angela Ivask Mats Astro 2005Science of the Total Environment2005,,350:1
3A platform for werable physiological computing显示文摘Astro Teller 2004Interacting with Computers2004,16,5:1
4Learning and optimization using the clonal selection显示文摘De ASTRO L N ZUBEN V 2002Artificial Immune System2002,6,3:1
5Impact of chemo -therapy dose - density on radiotherapy dose - intensity after breastconserving surgery显示文摘SanguinetiG DelM astro L GuenziM 0,,12:1
6ASTRO evidence- based review of the role of radiosurgery for malignant glioma显示文摘The American Society for Therapeutic Radiology and Oncology (ASTRO) 2005Int J Radiat Oncol Biol Phys2005,63,1:1
7Traditional and nontraditional risk factors predict coronary heart disease in chronic kidney disease: results from the Atherosclerosis Risk in Communities Study显示文摘Muntner P He J Astro BC 2005J Am Soc Nephrol2005,16,2:1
8Friction generated limit cycles 显示文摘OLSSON H ASTRO M K J 2001IEEE Transactions on Control System Technology2001,9,4:1
9The Application of GTD to the Design of Chokes Horn显示文摘TheApplicationofGTDtotheDesignofChokesHornSuDonglin;XieYulan;andLuShanwei(P.O.Box205,BeijingUniversityofAeronauticsandAstrona...Su Donglin Xie Yulan and Lu Shanwei (P.O.Box 205, Beijing University of Aeronautics and Astro nautics, Beijing (100083), PRC) 1994Journal of Systems Engineering and Electronics1994,5,2:0
10“曲”中有真意显示文摘'直线属于人类,曲线属于上帝。'建筑鬼才高迪穷极一生在建筑中追寻自然的踪迹,将有机的曲线融入其设计之中,一座美轮美奂的圣家族大教堂就足以表达这种震撼的美。对于曲线之美的追求,也同样存在于东方美学之中,象征圆融与圆满的圆形,也常被当作一种精神符号运用于东方的艺术与建筑等领域。曲线如此备受设计师和艺术家们的青睐,其中的一个重要原因或许源自其温和圆润的观感,直角给人简洁干练的印象,而弧度却多了一份亲和力,从心理感受上会让人更愿意亲近。Alain Gilles Astro Axolight Layer Masquespacio Nendo 范嘉苑(策划/编译) 2020现代装饰2020,,8:0
11An Experiment to Explain Depth of Cut Notch Wear of Ceramic Tools in Ni- based Super-alloy Machining显示文摘Inconel 718, a high temperature alloy, is extensive ly used in aircraft, gas engines and nuclear-power plants. It is generally known that the life of ceramic cutting tools in machining Inconel 718 is often restric ted by depth-of-cut (DOC) notch wear. In view of the number of various factors involved and the variety of tool materi als and cutting conditions available, the analysis of the DOC notch wear is very difficult. According to previous work concerning the DOC notch wear of ceramics tools, some Al 2O 3 - and Si 3N 4 -based ceramics tools have show n that the degree of tool notching depends on the thermal shock resistance of a tool material and thermal gradients (interrupted cutting, use of flood coolants) . Other observations suggest that there are chemical interactions between the to ol material and the work-piece. At the same time, an analytical technique based on thermodynamic properties for estimating cutting tool wear was proposed. Howe ver, so far, there is no concrete and convincing explanation for the DOC notch w ear. In all previous studies on the DOC notch wear, it is often assumed that notch we ar happened in the contacting region of the cutting tool and the work-piece, wh ile the exact position of notch wear is always neglected. In his article, He Ning measured the distance l n between tool nose and the center of DOC notch wear, and calculated the theoretical working length l d ― the ideal distance between the DOC notch center and the intersection of th e theoretical depth of cut line and the cutting edge. He found that l n is always greater than l d. It means that the position of the DOC notch is not at the depth of cut line, but out of the theoretical cutting area. He supposed that the saw-tooth shaped burrs and fin-shaped chip edges cause the DOC no tch wear, because only the saw-tooth shaped burrs and fin-shaped chip edges ha ve effect on the tools at the region of notch wear. Although He described the reason of notch wear and did some theoretical analysis of it, he has not done some experiments to verify it. In this paper, an experim ent was done to verify He’s assumption about DOC notch wear. In the present exp eriment, which has been done with the ceramic inserts (LT55), Working conditions at the region of DOC notch wear were analyzed. By using a KISTLER 9265B dyn amometer, the dynamic cutting force signals in three directions were pick up. By comparison between the theoretical frequency, with which the saw-shaped burr a nd fin-shaped chip edge impact on the region of notch wear, and the experimenta l results, it can be seen that the high frequency components of dynamic cutting forces mainly result from the impact effects of the saw-shaped burr and fin-sh aped chip edge. In high speed machining of nickel based alloys, DOC notch wear of ceramic tools is mainly because the impact effect of the burr and fin-shaped chip edge causes tools to be of fatigue damage, and the adherence between tool material and work piece material changes the direction of pressure stress and makes the micro-cra ck to appear and extend quickly.WANG Zhi-gang 1, HE Ning 2 (1. Dept. of Mechanical Engineering, National University of Singapore, Singapore 2. Dept. of Mechanical Engineering, Nanjing University of Aero.& Astro , Nanj ing 210016, China) 2002厦门大学学报(自然科学版)2002,41,S1:0
12对人工智能的恐慌没有道理显示文摘从二百多年前的蒸汽机,到二十多年前的克隆技术,纵观人类科技发展史,因某种新科技的出现而引发人们的恐慌已经不是第一次了,只不过当今媒体的发展,加上好莱坞推波助澜的渲染,人工智能(AI)“威胁论”被放大了N倍。Astro Teller Danielle Teller Wendy 2016疯狂英语(新悦读)2016,0,7:0
13布雷特·勒夫莱蒂:与地心引力对抗显示文摘在过去的24年里,布雷特·勒夫莱蒂(Brett Lovelady)亲自设计与指导了近500多种新产品和100个新品牌的推出。其中不仅有为美国奠定下文化和产业根基的品牌,其设计还曾为这些全球客户创造了超过600亿美元的收入。设计系毕业的布雷特已不再是纯粹的'工业设计师'那么简单,自称为'创意资本家'的他早已是业界'大师级'的人物。甄健恒 ASTRO Studios(图) 2019艺术与设计2019,0,3:0
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