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起重机结构疲劳剩余寿命评估方法研究 被引量:50
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作者 徐格宁 左斌 《中国安全科学学报》 CAS CSCD 2007年第3期126-130,共5页
针对机械结构的主要破坏形式——疲劳破坏,以桥式起重机焊接箱形主梁为研究对象,根据断裂力学Paris-Erdogan方程,结合Miner疲劳损伤累积理论,应用实验所得数据,推导出疲劳剩余寿命公式。采集不同类型,不同额定起重量起重机一段时间内相... 针对机械结构的主要破坏形式——疲劳破坏,以桥式起重机焊接箱形主梁为研究对象,根据断裂力学Paris-Erdogan方程,结合Miner疲劳损伤累积理论,应用实验所得数据,推导出疲劳剩余寿命公式。采集不同类型,不同额定起重量起重机一段时间内相应起重量的工作次数数据,以模拟出危险点处相应的载荷谱。以VC++为开发平台,研制完成桥式起重机疲劳剩余寿命评估软件。该软件可模拟实现普通、铸造桥式起重机的疲劳剩余寿命估算,并与实验结果进行比较,表明具有较高的吻合性和实用性。 展开更多
关键词 桥式起重机 焊接箱形梁 载荷谱 疲劳寿命 估算
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罗汉果苷ⅢE的酶法合成 被引量:3
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作者 陈玲 陈依军 +1 位作者 王淑珍 吴旭日 《中国药科大学学报》 CAS CSCD 北大核心 2018年第3期354-359,共6页
为开发罗汉果苷ⅢE的简易制备方法,为开发罗汉果苷类甜味剂提供参考依据。本研究以罗汉果苷Ⅴ为探针筛选糖苷水解酶库,获得了能够区域选择性合成罗汉果苷ⅢE的CPU-GH17,通过考察异丙基硫代半乳糖苷(IPTG)浓度、诱导温度和时间等参数建立... 为开发罗汉果苷ⅢE的简易制备方法,为开发罗汉果苷类甜味剂提供参考依据。本研究以罗汉果苷Ⅴ为探针筛选糖苷水解酶库,获得了能够区域选择性合成罗汉果苷ⅢE的CPU-GH17,通过考察异丙基硫代半乳糖苷(IPTG)浓度、诱导温度和时间等参数建立了CPU-GH17的高效可溶性表达条件:0.4 mmol/L IPTG、15℃和12 h。在此基础上,针对反应p H、温度、酶量、底物浓度以及反应时间等参数进行系统优化,最终确定pH 6.0、45℃、3 U/mL酶、5 mg/mL底物和20 h时,罗汉果苷Ⅴ可以完全转化成罗汉果苷ⅢE。本研究成功地开发了基于CPU-GH17的罗汉果苷ⅢE的酶法合成新工艺,并验证了其规模化生产的可行性。 展开更多
关键词 罗汉果苷ⅢE 天然甜味剂 糖苷水解酶 酶法合成
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From automated home to sustainable,healthy and manufacturing home:a new story enabled by the Internet-of-Things and Industry 4.0 被引量:2
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作者 Jakob Branger Zhibo Pang 《Journal of Management Analytics》 EI 2015年第4期314-332,共19页
This paper seeks to expand on the role for future homes in relation to automation,sustainability,healthcare and manufacturing.The world is changing and the home along with it.Services provided in the home will no long... This paper seeks to expand on the role for future homes in relation to automation,sustainability,healthcare and manufacturing.The world is changing and the home along with it.Services provided in the home will no longer act separately but will be all the more integrated into each other as new connections between services increase the value for residents in the home.This paper presents some of the possible integrated services and a close-up of the networked manufacturing service.A conceptual communication infrastructure for the service is finally provided. 展开更多
关键词 HOME automation SUSTAINABILITY healthcare MANUFACTURING integrated services EIS iiie
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An evolving trajectory-from PD,logistics,SCM to the theory of material flow
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作者 Hanping Hou Mikhail Yu Kataev +4 位作者 Zuopeng(Justin)Zhang Sohail Chaudhry Huiqi Zhu Liuliu Fu Mingli Yu 《Journal of Management Analytics》 EI 2015年第2期138-153,共16页
The growing interest in the material flow(MF)theory has invoked much interesting research in recent years.Although the MF theory is relatively new,a review of the related literature from a historical perspective shows... The growing interest in the material flow(MF)theory has invoked much interesting research in recent years.Although the MF theory is relatively new,a review of the related literature from a historical perspective shows that MF theory represents a new stage of the evolutionary development of interrelated subjects such as Physical Distribution(PD),Logistics,and Supply Chain Management(SCM).The purpose of this paper is to provide a summative review of the evolution of the subjects of PD,Logistics,and SCM,and their new development,MF theory.The paper aims at tracing how concepts and findings in PD,Logistics,SCM,and MF have been developed and have evolved.The study shows that PD evolved to Logistics in middle of the 1980s;starting from the late 1990s,Logistics has evolved to SCM;and today PD,Logistics,and SCM can be considered to be under the umbrella provided by a new theory called MF theory.This paper points out that MF theory is a necessity to deal with the overwhelming complexity of material flow systems in the global economy of the twenty-first century. 展开更多
关键词 physical distribution(PD) LOGISTICS supply chain management(SCM) material flow(MF)theory industrial information integration engineering(iiie)
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