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How R&D investment promotes green technology innovation in the context of digitalization?-An empirical analysis based on provincial panel data
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作者 LIU Jie LI Zhi-hui WEI Fang-xin 《Ecological Economy》 2024年第1期39-52,共14页
Green technology innovation is an important driving force and source to promote my country’s high-quality development,and it is the core path to achieve sustainable development.This paper uses my country’s provincia... Green technology innovation is an important driving force and source to promote my country’s high-quality development,and it is the core path to achieve sustainable development.This paper uses my country’s provincial panel data from 2016 to 2019 to study the impact mechanism of R&D investment on green technology innovation,and introduces the level of digitization,using the panel threshold model to discuss its role in the impact mechanism of R&D investment on green technology innovation.The study found that when the level of digitalization in a region is low,increasing R&D investment does not necessarily improve the ability of green technology innovation;when the level of digitalization is relatively high,R&D investment has a positive role in promoting green technology innovation.Therefore,it is necessary to improve policies to encourage enterprises to increase investment in research and development;at the same time,it is necessary to promote the coordinated development of digital foundation,digital investment,digital literacy,digital economy and digital application,and promote the deep integration of digitalization and green technology innovation. 展开更多
关键词 green technology innovation r&d investment digital level panel model
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ERICA2.0软件和R&D128程序中^(41)Ar和^(85)Kr核素对陆生生物辐射剂量率估算对比的初步研究
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作者 熊潇颖 杜红燕 +4 位作者 魏其铭 白晓平 王晓亮 郑伟 邱林 《核科学与工程》 CAS CSCD 北大核心 2023年第4期777-781,共5页
在我国的生物辐射影响评价中,现阶段计算惰性气体对生物的辐射剂量影响大多采用R&D128程序,ERICA软件计算其他核素对生物的剂量率。本文从参考生物、惰性气体核素、计算公式、主要参数等方面对2021年升版的ERICA2.0软件和R&D12... 在我国的生物辐射影响评价中,现阶段计算惰性气体对生物的辐射剂量影响大多采用R&D128程序,ERICA软件计算其他核素对生物的剂量率。本文从参考生物、惰性气体核素、计算公式、主要参数等方面对2021年升版的ERICA2.0软件和R&D128程序进行了对比。以我国某核电厂两台机组为例,分别使用这两个方法计算了^(41)Ar和^(85)Kr核素对生物的辐射剂量率。计算结果表明,对于惰性气体核素的辐射影响计算,^(41)Ar和^(85)Kr的计算使用R&D128程序是相对保守和可行的;对于其他的惰性气体的计算,可采用ERICA2.0软件。因此在生物辐射影响评价中,可将R&D128程序和ERICA2.0软件结合使用,进行惰性气体对生物造成的辐射剂量的计算和分析。 展开更多
关键词 ErICA2.0软件 r&d128程序 陆生生物 惰性气体
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SRS-19模型和R&D 128模型在ERICA程序陆生生物辐射影响评价中的应用研究 被引量:5
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作者 杜红燕 白晓平 +1 位作者 郑伟 毛亚蔚 《辐射防护》 CAS CSCD 北大核心 2015年第1期20-25,共6页
ERICA程序是广泛应用于非人类物种辐射效应的评估程序。运用ERICA程序对某核电厂正常运行时陆生生物所受到的辐射剂量率进行估算和评价,鉴于ERICA程序中作为程序输入参数的特定场址的核素浓度难以获取,且程序不能对惰性气体进行计算,本... ERICA程序是广泛应用于非人类物种辐射效应的评估程序。运用ERICA程序对某核电厂正常运行时陆生生物所受到的辐射剂量率进行估算和评价,鉴于ERICA程序中作为程序输入参数的特定场址的核素浓度难以获取,且程序不能对惰性气体进行计算,本文采用SRS-19模型计算核素浓度,并以半衰期较长的85Kr为例,初步尝试使用R&D 128模型对惰性气体的辐射生物影响进行估算。结果表明,两模型对ERICA程序能够起到较好的补充作用,厂址周围各类陆生生物所受辐射影响不大。 展开更多
关键词 SrS-19模型 r&d 128模型 ErICA程序 陆生生物 辐射影响评价
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R&D 128和ERICA模型在陆生生物辐射剂量估算中的应用研究 被引量:3
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作者 白晓平 王晓亮 +2 位作者 杜红燕 毛亚蔚 郑伟 《辐射防护》 CAS CSCD 北大核心 2014年第3期177-182,共6页
R&D 128和ERICA分别是英格兰和威尔士环境当局、欧共体推荐的估算非人类物种辐射剂量的模型。从陆生生物辐射剂量估算的原理、核素种类、参考生物种类、计算参数等方面对R&D128和ERICA进行了比较和分析,并利用两个模型对我国某A... R&D 128和ERICA分别是英格兰和威尔士环境当局、欧共体推荐的估算非人类物种辐射剂量的模型。从陆生生物辐射剂量估算的原理、核素种类、参考生物种类、计算参数等方面对R&D128和ERICA进行了比较和分析,并利用两个模型对我国某AP1000核电厂周围陆生生物辐射剂量率进行了计算,最后对比分析了两个模型的计算结果和优缺点。 展开更多
关键词 陆生生物 辐射剂量估算 AP1000核电厂 r&d 128模型 ErICA模型
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Reflections on Research and Development Management Innovation in Huawei Enterprises
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作者 ZHAO Yao DING Hui WANG Tingyong 《Chinese Business Review》 2023年第1期31-36,共6页
As an advanced global provider of information and communication technology solutions,Huawei has always maintained a leading position in the ICT field and is committed to achieving a future information society and buil... As an advanced global provider of information and communication technology solutions,Huawei has always maintained a leading position in the ICT field and is committed to achieving a future information society and building a better fully connected world.Looking at the rapid development of Huawei,it is inseparable from its comprehensive and advanced enterprise management innovation concept,which is also one of the main reasons for helping Huawei become a world-class enterprise.“Huawei has not succeeded,it is just growing”is a famous quote from Ren Zhengfei,the main founder and president of Huawei.In the context of the rapid development of the Internet industry and information technology,enterprises must establish the concept of innovative development,implement innovation management,and create a good production and development environment.This paper analyzes the content of Huawei’s enterprise management innovation,including Huawei’s management philosophy,management mode,management status quo,and management innovation suggestions,understands and grasps the choice of enterprise management mode,learns advanced enterprise management experience,and provides reference for other enterprises to practice innovation management. 展开更多
关键词 Huawei r&d management model organizational structure process management
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A Study on Assessment Model of Colleges' R&D Institution of Hebei Province
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作者 Hu Baomin Yang Lankun Wang Lin(Dept.of Business Adiministration,Hebei University of Technology,Tianjin 300130,P.R.China) 《河北工业大学学报》 CAS 1997年第A01期35-40,共6页
This paper,in view of colleges’ R&D institUtion assessment of Hebeiprovince,builds DEA assessment model,and compares this model with the general evaluation method.
关键词 colleges’ r&d INSTITUTION ASSESSMENT dEA model
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R&D项目投资决策的实物期权分析法简评 被引量:1
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作者 杨硕 《经济师》 2007年第8期15-16,共2页
实物期权是期权理论在公司财务管理实务中的创新应用。针对于传统的NPV方法在R&D项目投资决策中忽视了投资的不可逆性、可延迟性等特性,实物期权理论充分地考虑了管理者进行R&D投资决策时拥有灵活的选择权,并将该种选择权量化,... 实物期权是期权理论在公司财务管理实务中的创新应用。针对于传统的NPV方法在R&D项目投资决策中忽视了投资的不可逆性、可延迟性等特性,实物期权理论充分地考虑了管理者进行R&D投资决策时拥有灵活的选择权,并将该种选择权量化,从而证明该选择权是具有价值的。文章在分析传统投资决策分析方法的缺点基础上,运用实物期权理论构建一个更加有效R&D项目投资决策体系,并通过实例,分析在未来环境不确定的情况下,如何决定是否投资于该项目。 展开更多
关键词 r&d 投资决策 实物期权 Black—Scholes model
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LncRNA MIAT靶向调节miR-128-3p对心房颤动大鼠心室重构和心肌纤维化的影响 被引量:10
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作者 邢佳侬 梁卓 +4 位作者 邢爱君 刘俊兰 彭宏超 张天桦 张春来 《天津医药》 CAS 北大核心 2022年第9期932-937,共6页
目的探讨保守的长链非编码RNA心肌梗死相关转录本(LncRNA MIAT)靶向调节miR-128-3p对心房颤动(AF)大鼠心室重构和心肌纤维化的影响。方法通过舌下静脉注射氯化钙-乙酰胆碱混合液,诱导构建AF大鼠模型,以随机数字表法将其平均分为模型组、... 目的探讨保守的长链非编码RNA心肌梗死相关转录本(LncRNA MIAT)靶向调节miR-128-3p对心房颤动(AF)大鼠心室重构和心肌纤维化的影响。方法通过舌下静脉注射氯化钙-乙酰胆碱混合液,诱导构建AF大鼠模型,以随机数字表法将其平均分为模型组、LncRNA MIATsiRNA质粒组(MIAT组)、miR-128-3p siRNA质粒组(miR-128-3p组)、LncRNA MIATsiRNA质粒+miR-128-3p siRNA质粒组(MIAT+miR-128-3p组)、空载质粒组,每组12只。另12只大鼠舌静脉注射等剂量生理盐水,作为对照组。分组干预处理后,检测大鼠心房肌电生理水平,比较各组有效不应期(ERP)和90%动作电位时程(APD90);计算各组大鼠左心室质量指数;天狼星红染色检测大鼠心肌组织纤维化程度,比较各组心肌胶原容积分数(CVF);使用试剂盒测量各组大鼠血清白细胞介素(IL)-18、IL-6、转化生长因子-β1(TGF-β1)水平;实时荧光定量PCR检测各组大鼠心肌组织miR-128-3p表达;双荧光素酶报告基因试验检测LncRNA MIAT对miR-128-3p的靶向调节作用。结果与对照组比较,模型组大鼠ERP、APD90、心肌组织miR-128-3p表达降低(P<0.05),左心室质量指数、CVF、血清IL-18、IL-6及TGF-β1水平升高(P<0.05)。分别与模型组、MIAT+miR-128-3p组比较,MIAT组大鼠ERP、APD90、心肌组织miR-128-3p表达均升高,而左心室质量指数、CVF、血清IL-18、IL-6及TGF-β1水平均降低(P<0.05);miR-128-3p组大鼠ERP、APD90、心肌组织miR-128-3p表达均降低,而左心室质量指数、CVF、血清IL-18、IL-6及TGF-β1水平均升高(P<0.05);空载质粒组大鼠各指标水平差异均无统计学意义(P>0.05)。LncRNA MIAT可靶向下调miR-128-3p的表达。结论LncRNA MIAT可通过靶向下调miR-128-3p的表达而参与AF发病,下调LncRNA-MIAT可通过促进miR-128-3p表达来抑制炎症,减少房颤大鼠的心肌纤维化,改善其心房肌电生理水平,延缓大鼠心室重构过程。 展开更多
关键词 心房颤动 心室重构 心内膜心肌纤维化症 基因治疗 疾病模型 动物 长链非编码rNA心肌梗死相关转录本 mir-128-3p
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针刺调控miR-128-3p对卒中大鼠神经功能及Nrf2表达影响 被引量:2
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作者 黄秀容 张子强 +2 位作者 赖名殷 余瑾 袁青 《上海针灸杂志》 2020年第11期1457-1464,共8页
目的观察针刺对卒中大鼠的神经功能改善作用,并初步探讨其机制。方法建立脑缺血再灌注大鼠模型,72只SD大鼠随机分为模型组、激动剂组、激动剂阴性对照组、针刺组、针刺+激动剂组,每组12只,另取12只SD大鼠设为假手术组,针刺组、针刺+激... 目的观察针刺对卒中大鼠的神经功能改善作用,并初步探讨其机制。方法建立脑缺血再灌注大鼠模型,72只SD大鼠随机分为模型组、激动剂组、激动剂阴性对照组、针刺组、针刺+激动剂组,每组12只,另取12只SD大鼠设为假手术组,针刺组、针刺+激动剂组大鼠于双侧阳陵泉穴及曲池穴行针,激动剂组、激动剂阴性对照组、针刺+激动剂组大鼠分别以5 mL/kg剂量尾静脉注射miR-128-3p agomir、miR-128-3p agomir阴性对照,假手术组、模型组和针刺组尾静脉注射等剂量生理盐水,持续7 d。对各组大鼠进行神经功能缺损评分,以苏木素-伊红(HE)染色检测各组大鼠皮质组织病理变化,以酶联免疫吸附法检测血清中枢神经特异性蛋白(S100β)、神经元特异性烯醇化酶(NSE)、白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)水平,以实时荧光定量PCR检测各组大鼠脑皮质组织miR-128-3p、红系衍生的核转录相关因子(Nrf2)mRNA水平,以Western blot法检测脑皮质组织中Nrf2蛋白表达情况。结果与假手术组相比,模型组大鼠脑皮质神经元呈现细胞核收缩变小、细胞坏死、数量减少等病理损伤;神经功能缺损评分,血清中β、NSE、IL-6及TNF-α水平,脑皮质组织miR-128-3p水平均明显升高(P<0.05);脑皮质组织Nrf2 mRNA及蛋白水平明显降低(P<0.05)。与模型组相比,针刺组大鼠脑皮质神经元病理损伤减轻;神经功能缺损评分,血清中S100β、NSE、IL-6及TNF-α水平,脑皮质组织miR-128-3p水平降低(P<0.05);脑皮质组织Nrf2 mRNA及蛋白水平升高(P<0.05)。激动剂组大鼠脑皮质神经元病理损伤加重;神经功能缺损评分,血清中S100β、NSE、IL-6及TNF-α水平,脑皮质组织miR-128-3p水平升高(P<0.05);脑皮质组织Nrf2 mRNA及蛋白水平降低(P<0.05)。激动剂阴性对照组大鼠无明显变化(P>0.05)。与针刺组比较,针刺+激动剂组大鼠脑皮质神经元病理损伤加重;神经功能缺损评分,血清中S100β、NSE、IL-6及TNF-α水平,脑皮质组织miR-128-3p水平升高(P<0.05);脑皮质组织Nrf2 mRNA及蛋白水平降低(P<0.05)。与激动剂组比较,针刺+激动剂组大鼠脑皮质神经元病理损伤减轻;神经功能缺损评分,血清中S100β、NSE、IL-6及TNF-α水平,脑皮质组织miR-128-3p水平降低(P<0.05);脑皮质组织Nrf2 mRNA及蛋白水平升高(P<0.05)。结论针刺可能通过下调miR-128-3p表达,促进Nrf2表达,减轻卒中大鼠炎症损伤,改善其神经功能。 展开更多
关键词 针刺疗法 mir-128-3p 红系衍生的核转录相关因子 中风 MACO模型 大鼠
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Demonstration Analysis of Relationship Between R&D Investment and GDP
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作者 韩伯棠 刘百善 陈铿 《Journal of Beijing Institute of Technology》 EI CAS 2005年第1期96-99,共4页
To reveal the quantitative relationship between research and development (R&D) investment and gross domestic product (GDP) in China, we have demonstrated and analyzed the relationship between R&D investment an... To reveal the quantitative relationship between research and development (R&D) investment and gross domestic product (GDP) in China, we have demonstrated and analyzed the relationship between R&D investment and science and technology (S&T) progress, and based on a mount of S&T statistical data, have proceeded demonstration research of the relationship between R&D investment and GDP in China with Solow and vector auto regression (VAR) models. Cubic curve fitting and cross-correlation analysis of them with SPSS have shown that there is a strong synchronic relationship between R&D investment and GDP. 展开更多
关键词 research and development (r&d) investment gross domestic product (GdP) Solow model vector auto regression (VAr) model
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Optimization of Chinese power enterprises R&D staff incentive mechanism
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作者 SUN Jin-ting LI Ying +1 位作者 TIAN Si-jie ZHANG Lin-yue 《Ecological Economy》 2017年第1期59-68,共10页
With the deepening of electric power market reform in China,the monopoly edge of the state-owned electric power enterprises will lose.On the basis of the existing post performance salary mechanism,Chinese power enterp... With the deepening of electric power market reform in China,the monopoly edge of the state-owned electric power enterprises will lose.On the basis of the existing post performance salary mechanism,Chinese power enterprises need to optimize the incentive mechanism of R&D staff,to arouse the R&D staff's enthusiasm and creativity,to adapt to the new market competition and further improve market value.Whilst the incentive mechanism optimizing processing needs to consider not only the changing market environment but also the personal and working characteristics of R&D staff.This paper summarizes the characteristics of the current Chinese power enterprises' R&D staff:staff's theory quality is high,but insensitive to the market;they are confronted with heavy workload and diversified job choices;managers can observe their behavior choices or not;besides,the process of R&D is complex and the market reactions of R&D achievements are uncertain.Based on the premise of the above features,two incentive models are established in this paper from the point of view of enterprise managers.One is for the situation when staff's behavior choices can be observed;the other is for the situation when staff's behavior choices cannot be observed.Through solving the model,we analyze the optimization path of electric power enterprises R&D staff incentive mechanism under these conditions:(1) when staff's behavior choices can be observed,managers can pay more to the R&D staff who develop products with higher output value,in order to encourage them to work harder.(2) when staff's behavior choices cannot be observed,managers should take reasonable strategies according to the different situations:a.when R&D staff incentive totally depend on the market value of the R&D achievements,managers should allocate workload rationally according to their different technical levels;b.when the market reactions of R&D results become more precarious,managers need to reduce the incentive intensity which based on the market value and raise their fixed salary level;c.when R&D staff become more risk averse,managers should reduce the incentive intensity which based on the market value and raise their fixed salary level;on the contrary,managers should improve the incentive intensity and reduce the fixed salary level. 展开更多
关键词 electric power enterprises r&d staff incentive model incentive mechanism optimization
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The adjustment of γ-aminobutyric acid_A tonic subunits in Huntington's disease:from transcription to translation to synaptic levels into the neostriatum
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作者 Abraham Rosas-Arellano Argel Estrada-Mondragón +2 位作者 Carola A.Mantellero Carlos Tejeda-Guzmán Maite A.Castro 《Neural Regeneration Research》 SCIE CAS CSCD 2018年第4期584-590,共7页
γ-Aminobutyric acid(GABA),plays a key role in all stages of life,also is considered the main inhibitory neurotransmitter.GABA activates two kind of membrane receptors known as GABAA and GABAB,the first one is respo... γ-Aminobutyric acid(GABA),plays a key role in all stages of life,also is considered the main inhibitory neurotransmitter.GABA activates two kind of membrane receptors known as GABAA and GABAB,the first one is responsible to render tonic inhibition by pentameric receptors containing α4-6,β3,δ,or ρ1-3 subunits,they are located at perisynaptic and/or in extrasynaptic regions.The biophysical properties of GABAA tonic inhibition have been related with cellular protection against excitotoxic injury and cell death in presence of excessive excitation.On this basis,GABAA tonic inhibition has been proposed as a potential target for therapeutic intervention of Huntington's disease.Huntington's disease is a neurodegenerative disorder caused by a genetic mutation of the huntingtin protein.For experimental studies of Huntington's disease mouse models have been developed,such as R6/1,R6/2,Hdh Q92,Hdh Q150,as well as YAC128.In all of them,some key experimental reports are focused on neostriatum.The neostriatum is considered as the most important connection between cerebral cortex and basal ganglia structures,its cytology display two pathways called direct and indirect constituted by medium sized spiny neurons expressing dopamine D1 and D2 receptors respectively,they display strong expression of many types of GABAA receptors,including tonic subunits.The studies about of GABAA tonic subunits and Huntington's disease into the neostriatum are rising in recent years,suggesting interesting changes in their expression and localization which can be used as a strategy to delay the cellular damage caused by the imbalance between excitation and inhibition,a hallmark of Huntington's disease. 展开更多
关键词 GABAA extrasynaptic and perisynaptic y-aminobutyric acidA receptors STrIATUM r6/1 r6/2 HdhQ92 HdhQ111 HdhQ150 N171-82Q and YAC128 Hd transgenics mice models CHOrEA mutanthuntingtin inhibitory neurotransmission d1 medium sized spiny neurons d2 medium sized spiny neurons
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新型128导大脑磁刺激仪的研制 被引量:1
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作者 周鹏 贺威忠 +2 位作者 王学民 林冬冬 王明时 《仪器仪表学报》 EI CAS CSCD 北大核心 2010年第12期2803-2808,共6页
为实现对经颅磁刺激强度、深度、聚焦性、频率、刺激范围和时间等参数的精确控制,研制了一种新型128导大脑磁刺激仪。利用有限元方法建立了4层真实头模型,对不同尺寸线圈以及小线圈组的不同组合方式下,在脑内产生的电磁场进行仿真分析,... 为实现对经颅磁刺激强度、深度、聚焦性、频率、刺激范围和时间等参数的精确控制,研制了一种新型128导大脑磁刺激仪。利用有限元方法建立了4层真实头模型,对不同尺寸线圈以及小线圈组的不同组合方式下,在脑内产生的电磁场进行仿真分析,结果表明:相对于单线圈刺激,小线圈组能有效地控制磁刺激强度、深度和范围,并能实现多点同时刺激,具有更优越的性能。基于上述结论,结合经颅磁刺激的特殊要求,介绍了128导大脑磁刺激仪的整体结构和软硬件设计方案;该仪器配置灵活,可针对不同应用设置各种磁刺激治疗方案,在科学研究和临床医学方面有广阔的应用前景。 展开更多
关键词 128导经颅磁刺激 有限元分析 真实头模型
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基于MC9S12XS128单片机教练车模型的教学演示系统设计 被引量:1
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作者 陈辉 摆玉龙 +5 位作者 李静 朱海静 张宁 李鹏飞 于文龙 张旭霞 《自动化与仪器仪表》 2013年第2期55-57,共3页
针对驾校实际教学中存在的诸多问题,为方便教练员向学员传授"侧方位停车"的教学过程,自主设计了基于MC9S12XS128单片机教练车模型的教学演示系统。以飞思卡尔MC9S12XS128单片机为主控芯片,WT588D为语音播报芯片,选用Code Warr... 针对驾校实际教学中存在的诸多问题,为方便教练员向学员传授"侧方位停车"的教学过程,自主设计了基于MC9S12XS128单片机教练车模型的教学演示系统。以飞思卡尔MC9S12XS128单片机为主控芯片,WT588D为语音播报芯片,选用Code Warrior作为编译软件,程序设计采用C语言,设计制作了一个有自主识别行驶路线、语音定点播报讲解、LED灯提示显示的智能教练车模型,可帮助驾校学员直观、快速地理解和记忆驾驶技巧和所需注意的问题。 展开更多
关键词 MC9S12XS128 WT588d Code WArrIOr 教练车模型
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针对AES-128算法的密钥优势模板攻击 被引量:5
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作者 樊昊鹏 袁庆军 +2 位作者 王向宇 王永娟 王涛 《电子学报》 EI CAS CSCD 北大核心 2020年第10期2003-2008,共6页
模板攻击分为模板刻画和密钥恢复两个阶段.针对AES-128算法,模板攻击为每一字节密钥构建256个模板,当攻击者仅获得1000条左右的能量迹时将面临两个问题:一是模板刻画不具有适用性,二是无法恢复正确的密钥.针对这些问题,本文在模板刻画... 模板攻击分为模板刻画和密钥恢复两个阶段.针对AES-128算法,模板攻击为每一字节密钥构建256个模板,当攻击者仅获得1000条左右的能量迹时将面临两个问题:一是模板刻画不具有适用性,二是无法恢复正确的密钥.针对这些问题,本文在模板刻画阶段为S盒输出值的汉明重量构建9个模板,利用Panda 2018数据集提供的600条能量迹进行建模;在密钥恢复阶段提出密钥优势叠加的方法,仅需约10条相同密钥加密所产生的能量迹即可有效区分正确密钥,降低了攻击的难度并提高了攻击的成功率. 展开更多
关键词 模板攻击 AES-128算法 密钥优势 汉明重量模型
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128层螺旋CT在正常模型测量中的可靠性研究
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作者 常捷 李武 +1 位作者 滕永健 赵晶帆 《中国医疗设备》 2014年第6期173-175,共3页
目的:通过对20副正常模型的128层螺旋CT测量结果与传统手工测量结果进行比较,验证128层螺旋CT系统的可靠性、可重复性、精确性。方法应用128层螺旋CT机对正常模型进行容积扫描、数据采集,并进行函数重建得到0.6 mm层厚图像,传送至配... 目的:通过对20副正常模型的128层螺旋CT测量结果与传统手工测量结果进行比较,验证128层螺旋CT系统的可靠性、可重复性、精确性。方法应用128层螺旋CT机对正常模型进行容积扫描、数据采集,并进行函数重建得到0.6 mm层厚图像,传送至配套3D工作站、Dental(齿科软件)、Inspace(4D无间断实时互动三维成像技术)等软件,利用轴位图像、MPR(多平面重建)、CPR (曲面重建)、VR(容积重建)等方法测量正常模型的上、下颌牙的牙齿宽度,牙弓长度、宽度等相关指标;同时用游标卡尺手工测量上述指标,将两种测量方法所得数据进行比较。结果两种测量方法具有相似的平行效度。CT系统的测量误差为-0.02~0.02 mm,精确度较高。结论128层螺旋CT可以满足临床正畸需要。 展开更多
关键词 128层螺旋CT 模型测量 游标卡尺 口腔正畸
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微小RNA-128在慢传输型便秘小鼠模型中的差异表达 被引量:3
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作者 周燕 解萧宇 +4 位作者 陈保祥 喻学桥 刘韦成 江从庆 钱群 《中华实验外科杂志》 CAS CSCD 北大核心 2018年第12期2272-2274,共3页
目的检测微小RNA(miRNA,miR)-128在慢传输型便秘(STC)小鼠模型中的表达。方法雌性小鼠54只,随机分成生理盐水组、吗啡组、吗啡+大黄组。吗啡组通过连续6d皮下注射吗啡制作急性便秘模型。确定急性便秘模型制作成功后,缓慢递增剂量喂食大... 目的检测微小RNA(miRNA,miR)-128在慢传输型便秘(STC)小鼠模型中的表达。方法雌性小鼠54只,随机分成生理盐水组、吗啡组、吗啡+大黄组。吗啡组通过连续6d皮下注射吗啡制作急性便秘模型。确定急性便秘模型制作成功后,缓慢递增剂量喂食大黄汤120d,建立小鼠STC动物模型。观察小鼠排便、肠道传输试验、结肠组织形态学变化,并通过实时定量聚合酶链反应(q-PCR)检测小鼠结肠组织miR-128的表达。结果吗啡+大黄组小鼠肠道传输距离显著缩短。吗啡+大黄组、生理盐水组及吗啡组小鼠肠道传输距离分别为(-1.60±3.21)、(14.75±3.75)、(6.50±1.50)cm。生理盐水组比吗啡+大黄组,差异有统计学意义(P=0.003);吗啡组比吗啡+大黄组,差异有统计学意义(P=0.024)。组织学结果显示吗啡+大黄组肠管明显变薄且肌层结构紊乱。吗啡+大黄组小鼠结肠组织中miR-128的表达显著下调。吗啡+大黄组、生理盐水组及吗啡组小鼠结肠组织中miR-128的表达量分别为(7.30±8.40)×10-7、(3.03±1.98)×10-6、(3.72±0.69)×10-6。生理盐水组比吗啡+大黄组,差异有统计学意义(P=0.048);吗啡组比吗啡+大黄组,差异有统计学意义(P=0.037)。结论运用小鼠慢性便秘模型验证了miR-128在STC结肠组织中表达下调。 展开更多
关键词 慢传输型便秘 模型 动物 微小rNAS 微小rNA-128
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基于SHA-3的密文数据检索技术 被引量:1
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作者 范雪峰 刘年义 +1 位作者 杨亚涛 李子臣 《计算机应用与软件》 CSCD 2015年第8期279-282,314,共5页
SHA-3算法的研究和应用已成为当前学术研究的热点。针对已有密文数据检索系统检索效率低的问题,在分析和研究已有密文数据检索技术的基础上,利用AES-128算法和SHA-3算法,设计和实现了基于SHA-3的密文数据检索系统。实验证明,该系统能够... SHA-3算法的研究和应用已成为当前学术研究的热点。针对已有密文数据检索系统检索效率低的问题,在分析和研究已有密文数据检索技术的基础上,利用AES-128算法和SHA-3算法,设计和实现了基于SHA-3的密文数据检索系统。实验证明,该系统能够实现数据库加密、密文精确检索和密文模糊检索,提高密文检索效率,保证数据库安全。二次检索模型和SHA-3算法的使用,使此系统的检索准确性和检索效率达到无索引明文检索的70%。 展开更多
关键词 数据库加密 密文数据检索 AES-128算法 SHA-3算法 二次检索模型
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Technology innovation for infectious diseases in the developing world 被引量:7
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作者 Anthony D So Quentin Ruiz-Esparza 《Infectious Diseases of Poverty》 SCIE 2012年第1期6-14,共9页
Enabling innovation and access to health technologies remains a key strategy in combating infectious diseases in low-and middle-income countries(LMICs).However,a gulf between paying markets and the endemicity of such ... Enabling innovation and access to health technologies remains a key strategy in combating infectious diseases in low-and middle-income countries(LMICs).However,a gulf between paying markets and the endemicity of such diseases has contributed to the dearth of R&D in meeting these public health needs.While the pharmaceutical industry views emerging economies as potential new markets,most of the world’s poorest bottom billion now reside in middle-income countries-a fact that has complicated tiered access arrangements.However,product development partnerships-particularly those involving academic institutions and small firms-find commercial opportunities in pursuing even neglected diseases;and a growing pharmaceutical sector in BRICS countries offers hope for an indigenous base of innovation.Such innovation will be shaped by 1)access to building blocks of knowledge;2)strategic use of intellectual property and innovative financing to meet public health goals;3)collaborative norms of open innovation;and 4)alternative business models,some with a double bottom line.Facing such resource constraints,LMICs are poised to develop a new,more resource-effective model of innovation that holds exciting promise in meeting the needs of global health. 展开更多
关键词 INNOVATION Technology ACCESS POLICY Public health r&d collaboration r&d Business model Open source Open innovation
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Mission-Oriented Mega-R&D Programs:Governance and Policy 被引量:1
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作者 Yutao Sun Cong Cao 《Innovation and Development Policy》 2021年第2期110-134,共25页
Using the concepts of technology goal(T),effective organization(O),and market end-user(M),this paper proposes a TOM framework for analyzing the contextual characteristics of adoption of the MMRD model as a tool of R&a... Using the concepts of technology goal(T),effective organization(O),and market end-user(M),this paper proposes a TOM framework for analyzing the contextual characteristics of adoption of the MMRD model as a tool of R&D governance.Applying the framework to cases across multiple historical periods,sectors,and countries,we find that R&D with a clear and specific technology goal,dominance of R&D by government agencies,and public sectors as end-users create an appropriate scenario for a government to adopt the MMRD model,while in doing so the government should also take into consideration such factors as economic efficiency,national security,and public interests.We evaluate the TOM framework based on its application to China’s practice,particularly its ongoing mega-engineering programs(MEPs).Only a few MEPs under its national development plan are likely to be successful while others will likely not achieve their original aims. 展开更多
关键词 mission-oriented r&d TOM model GOVErNANCE state-led innovation
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