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半承载式客车车身骨架动静态特性分析

山东交通学院学报 2011年第1期19卷 9-13,26页

作者：刘文彬黄俊杰邝坤阳合肥工业大学机械与汽车工程学院安徽合肥230009

建立了板梁单元相结合的客车有限元模型,通过静态电测试验验证了模型的准确性。计算静态条件下对车身骨架影响较大的扭转状态下的应力、弯矩、扭矩分布,并通过观察车身骨架的变形获悉客车结构的静态特性。对客车骨架进行谐响应分析,以... 详细信息

建立了板梁单元相结合的客车有限元模型,通过静态电测试验验证了模型的准确性。计算静态条件下对车身骨架影响较大的扭转状态下的应力、弯矩、扭矩分布,并通过观察车身骨架的变形获悉客车结构的静态特性。对客车骨架进行谐响应分析,以考察发动机怠速运转时,悬置点以及地板上不同位置的动力响应随频率的变化关系,得出对客车结构影响较大的频率,在结构优化时应尽量使车身结构的固有频率避开这些频率。通过对车身骨架的静动态分析,初步掌握了客车结构的特性,为客车车身结构的优化提供了依据。

关键词：车身骨架有限元模型扭转谐响应分析怠速激励

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流动强震观测无线接入远程通信实用方案

云南大学学报（自然科学版） 2006年第1期28卷 27-32页

作者：周挚刘琼仙梁虹全海燕张婕旷昆萍崔建文王建刘庆云南省地震局云南昆明650041 云南大学信息学院云南昆明650091 昆明理工大学信息工程与自动化学院云南昆明650051 云南省通信管理局云南昆明650011 云南省移动通信公司云南昆明650041 中国联通云南分公司云南昆明65005

在充分利用现有国家通信网络基础设施的前提下,基于市场所能提供的最新无线通信技术,提出2套适用于流动强震远程观测的无线接入远程通信实用方案.2套方案均适合流动强震观测野外工作特点.CD-MA方案在安全性和经济性略优于GPRS方案.

关键词：流动强震观测无线接入远程通信 GPRS CDMA

Population trends, threats, and conservation recommendations for waterbirds in China

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Avian Research 2018年第2期9卷 89-101页

作者： Xiaodan Wang Fenliang kuang kun Tan Zhijun Ma Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering Coastal Ecosystems Research Station of the Yangtze River Estuary Shanghai Institute of Eco-Chongming (SIEC) Fudan University

Background: China is one of the countries with abundant waterbird diversity. Over the past decades, China's waterbirds have suffered increasing threats from direct and indirect human activities. It is important to clarify the population trends of and threats to waterbirds as well as to put forward conservation ***: We collected data of population trends of a total of 260 waterbird species in China from Wetlands International database. We calculated the number of species with increasing, declining, stable, and unknown trends. We collected threatened levels of waterbirds from the Red List of China's Vertebrates(2016), which was compiled according to the IUCN criteria of threatened species. Based on literature review, we refined the major threats to the threatened waterbird species in ***: Of the total 260 waterbird species in China, 84 species(32.3%) exhibited declining, 35 species(13.5%) kept stable, and 16 species(6.2%) showed increasing trends. Population trends were unknown for 125 species(48.1%). There was no significant difference in population trends between the migratory(32.4% decline) and resident(31.8% decline) species or among waterbirds distributed exclusively along coasts(28.6% decline), inland(36.6% decline), and both coasts and inland(32.5% decline). A total of 38 species(15.1% of the total) were listed as threatened species and 27 species(10.8% of the total) Near Threatened species. Habitat loss was the major threat to waterbirds, with 32 of the total 38(84.2%) threatened species being affected. In addition, 73.7%(28 species), 71.1%(27 species), and 57.9%(22 species) of the threatened species were affected by human disturbance, environmental pollution, and illegal hunting, ***: We propose recommendations for waterbird conservation, including(1) strengthening conservation of nature wetlands and restoration of degraded wetlands,(2) enhancing public awareness on waterbird conservation,(3) improving the en

关键词： Conservation Habitats Population trend Threatened species Waterbirds Wetlands China

氟马西尼用于静吸复合全麻术后催醒的临床效果观察

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中国实用医药 2023年第9期18卷 116-119页

作者：邝昆合郑德志江进红李显立新兴县人民医院麻醉科 527400

目的探究氟马西尼用于静脉吸入复合全身麻醉(静吸复合全麻)术后催醒的临床效果。方法120例气管内静吸复合全麻经腹腔镜行下腹部手术择期患者为研究对象,按照随机数字表法分为观察组和对照组,每组60例。对照组给予生理盐水静脉注射催醒,... 详细信息

目的探究氟马西尼用于静脉吸入复合全身麻醉(静吸复合全麻)术后催醒的临床效果。方法120例气管内静吸复合全麻经腹腔镜行下腹部手术择期患者为研究对象,按照随机数字表法分为观察组和对照组,每组60例。对照组给予生理盐水静脉注射催醒,观察组给予氟马西尼静脉注射催醒。比较两组呼唤睁眼时间、清醒时间、拔管时间、给药后不同时间段生命体征变化及不良反应发生情况。结果观察组呼唤睁眼时间(5.75±1.15)min、清醒时间(7.11±1.56)min及拔管时间(10.44±2.26)min均明显短于对照组的(9.68±2.26)、(13.26±2.26)、(18.26±3.26)min,差异有统计学意义(P0.05);给药后15、30 min,观察组MAP低于对照组,HR、SpO_(2)高于对照组,差异有统计学意义(P<0.05)。观察组不良反应发生率为5.00%,低于对照组的21.67%,差异有统计学意义(P<0.05)。结论静吸复合全麻术后应用氟马西尼干预可缩短苏醒时间,降低术后不良反应发生率,值得临床应用。

关键词：术后催醒氟马西尼静脉吸入复合全身麻醉清醒时间

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极限组合工况下客车车身骨架刚度和强度分析

汽车科技 2010年第5期 47-50页

作者：黄俊杰张代胜王松邝坤阳合肥工业大学机械与汽车工程学院合肥230009

建立了板梁单元相结合的客车有限元模型,通过静态电测试验验证了模型的准确性。提出了通过计算极限扭转组合工况来检验客车车身骨架的刚度和强度的新方法,使用该方法达到了验证文中所研究的客车在极其恶劣的路面上行驶时,车身骨架的刚... 详细信息

建立了板梁单元相结合的客车有限元模型,通过静态电测试验验证了模型的准确性。提出了通过计算极限扭转组合工况来检验客车车身骨架的刚度和强度的新方法,使用该方法达到了验证文中所研究的客车在极其恶劣的路面上行驶时,车身骨架的刚度和强度能满足使用要求的目的,同时这种组合工况方法为客车骨架有限元分析的工况选择方面提供了新的参考。

关键词：车身骨架有限元分析刚度强度

A non-group parallel frequent pattern mining algorithm based on conditional patterns

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Frontiers of Information Technology & Electronic Engineering 2019年第9期20卷 1234-1245页

作者： Zhe-jun kuang Hang ZHOU Dong-dai ZHOU Jin-peng ZHOU kun YANG College of Computer Science and Technology Changchun UniversityChangchun 130022China School of Economics Changchun UniversityChangchun 130022China School of Information Science and Technology Northeast Normal UniversityChangchun 130117China Division of Engineering Science University of TorontoOntario M5S2E8Canada School of Computer Science and Electronic Engineering University of EssexColchester CO43SQUK

Frequent itemset mining serves as the main method of association rule *** the limitations in computing space and performance,the association of frequent items in large data mining requires both extensive time and effort,particularly when the datasets become increasingly *** the process of associated data mining in a big data environment,the MapReduce programming model is typically used to perform task partitioning and parallel processing,which could improve the execution effciency of the ***,to ensure that the associated rule is not destroyed during task partitioning and parallel processing,the inner-relationship data must be stored in the computer *** inner-relationship data are redundant,storage of these data will significantly increase the space usage in comparison with the original *** this study,we find that the formation of the frequent pattern(FP)mining algorithm depends mainly on the conditional pattern *** on the parallel frequent pattern(PFP)algorithm theory,the grouping model divides frequent items into several groups according to their *** propose a non-group PFP(NG-PFP)mining algorithm that cancels the grouping model and reduces the data redundancy between ***,we present the NG-PFP algorithm for task partition and parallel processing,and its performance in the Hadoop cluster environment is analyzed and *** results indicate that the non-group model shows obvious improvement in terms of computational effciency and the space utilization rate.

关键词： Frequent pattern mining Parallel algorithm Conditional pattern bases MapReduce Big data

Effects of ferrosilicon alloy,Si content of steel,and slag basicity on compositions of inclusions during ladle furnace refining of Al-killed steel

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Journal of Iron and Steel Research International 2020年第9期27卷 1011-1017页

作者： Jian-fei Xu kun-peng Wang Ying Wang Zhi-dong Qu Xing-kuang Tu Zenith Steel Group Co. Ltd.Changzhou 213000JiangsuChina

To obtain solid Al2O3 or MgO·Al2O3 inclusions in ladle furnace(LF)refining process and achieve ultra-low total oxygen content in steel through subsequent Ruhrstahl Heraeus degassing,the effects of ferrosilicon alloy,Si content of steel,and slag basicity on the compositions of inclusions during LF refining were investigated in Al-killed ***2O3 inclusions could be transformed into CaO-Al2O3-MgO-CaS inclusions after adding ferrosilicon alloy in the LF refining process as this alloy contains some CaSi alloy *** addition of all ferrosilicon alloys required for the steel in the tapping process could eliminate the influence of Ca in ferrosilicon alloy on the compositions of *** in liquid steel had a significant influence on the compositions of inclusions during LF refining when CaO-Al2O3-SiO2-MgO slag with high basicity of 7.0 was *** was because[Ca]produced by the reaction of CaO and[Al]could be consumed more readily by SiO2 in Si-free steel than in Si-containing steel,which was confirmed by the difference of total calcium content between Si-free and Si-containing *** a result,Al2O3 and MgO·Al2O3 inclusions were retained in Si-free steel,whereas calcium aluminate inclusions were found in Si-containing *** CaO-Al2O3-SiO2-MgO slag with low basicity of 2.8,Al2O3 and MgO·Al2O3 inclusions were obtained after LF refining in Si-containing steel when all ferrosilicon alloys required for the steel were added in the tapping *** was because the reaction of CaO and[Al]was weak,and residual[Ca]in the steel could be rapidly consumed by SiO2 in low-basicity slag owing to the low activity of CaO and high activity of SiO2,leading to a low total calcium content of 0.0003%in Si-containing steel.

关键词： Inclusion Ferrosilicon alloy Si content Basicity LF refining

面向数据权利、数据定价和隐私计算的数据驱动学习

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Engineering 2023年第6期25卷 66-76,M0004页

作者：徐基珉洪暖欣许哲宁赵洲吴超况琨王嘉平朱明杰周靖人任奎杨小虎卢策吾裴健沈向洋 College of Computer Science and Technology Zhejiang UniversityHangzhou 310027China International Digital Economy Academy Shenzhen 518045China Craiditx Shanghai 200050China Antgroup Hangzhou 310023China Department of Computer Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of Computing Science Simon Fraser UniversityBurnabyBC V5A 1S6Canada

近年来,数据已成为数字经济中最重要的生产要素之一。与传统生产要素不同,数据的数字化性质使其难以合同和交易。因此,建立一个高效和标准的数据交易市场体系将有利于降低成本,提高行业各方的生产力。尽管许多研究致力于数据法规和其他... 详细信息

近年来,数据已成为数字经济中最重要的生产要素之一。与传统生产要素不同,数据的数字化性质使其难以合同和交易。因此,建立一个高效和标准的数据交易市场体系将有利于降低成本,提高行业各方的生产力。尽管许多研究致力于数据法规和其他数据交易问题,如隐私和定价,但很少有工作对机器学习和数据科学领域的这些研究进行全面回顾。为了提供对这个主题的完整和最新的理解,本文涵盖了数据交易过程中的三个关键问题:数据权利、数据定价和隐私计算。通过厘清这些主题之间的关系,本文提供了一个数据生态系统的全貌,其中数据由个人、研究机构和政府等数据主体生成,而数据处理者出于创新或运营目的获取数据,并通过适当的定价机制根据数据主体各自的所有权分配收益。为了使人工智能(AI)能够长期有益于人类社会的发展,人工智能算法需要通过数据保护法规(即隐私保护法规)进行评估,以帮助构建日常生活中值得信赖的人工智能系统。

关键词：人工智能系统隐私计算机器学习数据保护传统生产要素数据驱动学习面向数据人工智能算法

Iron-catalyzed bromination of aryl azides by N-bromosuccinimide:Efficient method for the synthesis of brominated aryl azides

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Chinese Chemical Letters 2011年第3期22卷 310-313页

作者： Hui Jin Zhen Dong Huang Chun Xiang kuang Xiao kun Wang Department of Chemistry Tongji University Siping Road 1239 Shanghai 200092 China Zhejiang Citrus Research Institute Taizhou 318020 China

An efficient and mild protocol for bromination of aryl azides with N-bromosuccinimide（NBS） under FeCl_3 catalysis in 1,2- dichloroethane was *** is proved to be an efficient method for obtaining brominated aryl azides.

关键词： Iron-catalyzed Aryl azides N-Bromosuccinimide Bromination