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轴对称碳纤维增强塑料管中分层和孔隙的无损检测评定——切向X射线照相的适用范围及局限性 被引量:1
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作者 J.Lahirl D.L.Siddalingaiah +2 位作者 P.P.Kumaraguru k.s.reddy 李光耀 《无损检测》 北大核心 1995年第3期88-90,共3页
在航空航天领域内,轴对称复合结构得到了广泛的应用,而分层和孔隙是常规工艺缺陷中最常见的类别。众所周知,像分层那样的理想的片状二维缺陷不能用X射线检测出来,但是,分层事实上总是有一定厚度的。这时.如果超声C扫描不适用的话,可使... 在航空航天领域内,轴对称复合结构得到了广泛的应用,而分层和孔隙是常规工艺缺陷中最常见的类别。众所周知,像分层那样的理想的片状二维缺陷不能用X射线检测出来,但是,分层事实上总是有一定厚度的。这时.如果超声C扫描不适用的话,可使用切向X射线照相来获取零件中缺陷的永久性记录。但是,在应用这方法时,恒稳的可检测性及缺陷间的比较关系需要仔细地统计才能得到。问题的难点在于单束X射线在零件中穿过的光程既随零件的几何形状不同而不同,也与射线源-零件-胶片的位置有关。本文所作的探讨旨在:(a)弄清不同尺寸和位置的缺陷在采用本工艺方法时可检测的范围及其局限性。(b)怎样选择最佳射线照相参数。文中的工作虽然是针对具体尺寸的轴对称碳纤维增强塑料管的,但所提出的工艺方法在其适用范围内可很好地应用于其它任何零件。1 射线束光程的计算在我们的研究中,射线源-零件-胶片的位置如图1。 展开更多
关键词 碳纤维增强塑料 管材 无损检验 X射线探测
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增效磺胺嘧啶合剂对鸡沙门氏杆菌的功效
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作者 k.s.reddy 王英珍 《动物医学进展》 1988年第1期36-37,13,共3页
用鸡沙门氏杆菌进行体外试验表明:当TMP和SDZ的最小抑菌浓度值被降低到1/8时,这两种药物间的协同作用。TMP和SDZ的混合剂(60+300mg/L饭水给药)能减轻感染鸡沙门氏杆菌的鸡的内脏死后病变和降低细菌的分离数。故此种混和剂能抵抗禽病。... 用鸡沙门氏杆菌进行体外试验表明:当TMP和SDZ的最小抑菌浓度值被降低到1/8时,这两种药物间的协同作用。TMP和SDZ的混合剂(60+300mg/L饭水给药)能减轻感染鸡沙门氏杆菌的鸡的内脏死后病变和降低细菌的分离数。故此种混和剂能抵抗禽病。在人医和兽医中,磺胺类药物与甲氧苄氨嘧啶配合应用正日益广泛。提倡应用磺胺嘧啶一三甲氧苄氨嘧啶合剂治疗家畜的各种感染。据报导,这种合剂对狗和猫疗效最高。自发现这两种药适合作为药代动力学模型后,在家禽,已建议将磺胺嘧啶作为与三甲氧苄氨嘧啶配合的首选药。在推荐这种合剂应用于临床实践前,已认识到该制剂对病原菌的功效。 展开更多
关键词 鸡沙门氏杆菌 小鸡 合剂 SDZ 三甲氧苄氨嘧啶 磺胺嘧啶 磺胺类药 TMP
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An Experimental Analysis of the Applications of Datamining Methods on Bigdata
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作者 CH.Naga Santhosh Kumar k.s.reddy 《Journal of Autonomous Intelligence》 2019年第3期31-39,共9页
Data mining is a procedure of separating covered up,obscure,however possibly valuable data from gigantic data.Huge Data impactsly affects logical disclosures and worth creation.Data mining(DM)with Big Data has been br... Data mining is a procedure of separating covered up,obscure,however possibly valuable data from gigantic data.Huge Data impactsly affects logical disclosures and worth creation.Data mining(DM)with Big Data has been broadly utilized in the lifecycle of electronic items that range from the structure and generation stages to the administration organize.A far reaching examination of DM with Big Data and a survey of its application in the phases of its lifecycle won't just profit scientists to create solid research.As of late huge data have turned into a trendy expression,which constrained the analysts to extend the current data mining methods to adapt to the advanced idea of data and to grow new scientific procedures.In this paper,we build up an exact assessment technique dependent on the standard of Design of Experiment.We apply this technique to assess data mining instruments and AI calculations towards structure huge data examination for media transmission checking data.Two contextual investigations are directed to give bits of knowledge of relations between the necessities of data examination and the decision of an instrument or calculation with regards to data investigation work processes. 展开更多
关键词 Data Mining Big Data Knowledge Discovery Databases Decision Tree Cloud Data Mining K-Closest Neighbor Artificial Intelligence CLUSTER
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玉米抽雄后对无氮和施用不同比例NH_4/NO_3的反应
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作者 k.s.reddy 张满珍 边静 《国外农学(杂粮作物)》 1991年第5期23-25,共3页
玉米生殖生长开始,即抽雄后吸收的氮占吸收总氮的60~75%(Friedrich等,1979;Mills等,1982)。所以,从抽雄到成熟期间氮的有无会影响植株的营养生长和穗的发育。玉米抽雄前(播种后7周内)NH_4和NO_3两种形态的氮配合比其中单一形态氮更能... 玉米生殖生长开始,即抽雄后吸收的氮占吸收总氮的60~75%(Friedrich等,1979;Mills等,1982)。所以,从抽雄到成熟期间氮的有无会影响植株的营养生长和穗的发育。玉米抽雄前(播种后7周内)NH_4和NO_3两种形态的氮配合比其中单一形态氮更能促进玉米的营养生长(Schrader等,1972)。 展开更多
关键词 玉米 抽雄 无氮 施肥 反应
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Global production aspirations and internationalization by state-owned enterprises:A Co-evolutionary view of statedriven industrialized economy
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作者 Qingqing Tang En Xie k.s.reddy 《International Journal of Innovation Studies》 2022年第4期276-285,共10页
The study aims to explore whether internationalization by state-owned enterprises is a curse or blessing in the context of aspirant industrial economies,such as China.What do state-owned enterprises'global product... The study aims to explore whether internationalization by state-owned enterprises is a curse or blessing in the context of aspirant industrial economies,such as China.What do state-owned enterprises'global production aspirations,such as outward foreign direct investment,bring into their home country?To answer this question,this study proposes a unique,co-evolutionary perspective of the state-driven industrialized economy by leveraging insights from economic discoveries such as Adam Smith's wealth of nations,David Ricardo's comparative advantage,and Michael Porter's competitive advantage.This view suggests that an outward foreign investment strategy may likely provide state-owned enterprises with access to resources and advanced production technologies,enhance innovation capabilities,gain more competitive advantage,and achieve superior performance,thus leading to spillover effects on their home country's wealth,comparative advantage,and competitiveness.This study discusses China's grand policies,economic performance,and successful cross-border industrial acquisitions. 展开更多
关键词 State-owned enterprises INTERNATIONALIZATION Outward foreign direct investment Wealth of nations Comparative advantage COMPETITIVENESS
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