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人工血管移植物内瘘护理知信行问卷的编制及信效度检验

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循证护理 2024年第14期10卷 2566-2571页

作者：张帆杨雪李敏张如渊乐山市人民医院四川614000

目的:编制人工血管移植物内瘘护理知信行问卷并检验其信效度。方法:以知信行理论为指导,通过文献回顾、专家咨询、预调查后形成初始问卷。采用便利抽样方法,选取440名血液净化护士进行调查,采用Cronbach′s α系数、重测信度、内容效度... 详细信息

目的:编制人工血管移植物内瘘护理知信行问卷并检验其信效度。方法:以知信行理论为指导,通过文献回顾、专家咨询、预调查后形成初始问卷。采用便利抽样方法,选取440名血液净化护士进行调查,采用Cronbach′s α系数、重测信度、内容效度等对该问卷进行评价。结果:人工血管移植物内瘘护理知信行问卷由知识、信念、行为3个维度及36个条目构成。总问卷及知识、态度、行为维度的内容效度分别为0.925,0.909,0.922,0.929,Cronbach′s α系数分别为0.947,0.983,0.887和0.858,重测信度为0.968。结论:本研究编制的问卷具有良好信效度,可作为评价护士人工血管移植物内瘘知信行现状的研究工具。

关键词：人工血管移植物内瘘知信行护理信度效度

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A NEW ALGORITHM FOR MAIN CARRIER ACQUISITION IN DEEP SPACE COMMUNICATIONS

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Journal of Electronics(China) 2011年第2期28卷 169-173页

作者： zhang ruyuan Zhan Yafeng Lu Jianhua Department of Electronic Engineering Tsinghua University Beijing 100084 China Space Center Tsinghua University Beijing 100084 China

Compared with common near space satellite Telemetry,Telecommand,and Communication(TT&C),deep space TT&C presents a more challenging environment such as long distance,very low Signal to Noise Ratio(SNR).How to acquire main carrier exactly becomes a hot focus for deep space *** there emerged some main carrier acquisition algorithms,but they all require high SNR and small modulation *** this paper,we develop a new acquire *** we use the spectral energy center algorithm to shorten the original sequence,filter out some noise and make the spectral more *** we adopt the spectral symmetry algorithm to make full use of the whole spectrum information,and utilize FFT to reduce computation *** results show that our algorithm can acquire main carrier successfully under large modulation index and get good performance with low Carrier to Noise Ratio(CNR).

关键词： Deep space Telemetry Telecommand and Communication(TT&C) Main carrier acqui-sition Low Carrier to Noise Ratio(CNR) Modulation index

CENOZOIC VOLCANIC ROCK SERIES IN SOUTHEASTERN CHINA——PETROCHEMISTRY

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Science in China,Ser.B 1986年第12期29卷 1330-1344页

作者：从柏林张儒瑗 Institute of Geology Academia Sinica Beijing

In this paper, the age, spatial distribution and petrochemistry of Cenozoic volcanic rocks of southeastern China are discussed. They are subalkalic and alkalic. Except for the Pleistocene calc-alkalic volcanic rocks of northern Taiwan and the Late Tertiary tholeiitic rocks of Eastern Coastal Range of Taiwan, the alkalic basaltic rocks form the majority. Only alkalic and strongly alkalic basaltic and ultrabasic volcanic rocks occur in the inland to the west of the Haifeng-Zhenghe-Shangyu fracture zone. It follows that the petrochemical nature of the Cenozoic volcanics studied exhibits a marked trend of variation with time and space, implying that their formation was obviously controlled by the geotectonic setting.

关键词： Pro PETROCHEMISTRY CENOZOIC VOLCANIC ROCK SERIES IN SOUTHEASTERN CHINA ROCK CAB

形状记忆合金的力学及界面参数和体积分数对大块金属玻璃基复合材料增韧的影响

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复合材料学报 2015年第1期32卷 188-195页

作者：张茹远阚前华张娟康国政西南交通大学力学与工程学院成都610031

采用考虑塑性的超弹性材料模型和基于损伤塑性的准脆性材料模型,建立了三维单胞有限元模型,模拟了形状记忆合金颗粒增韧大块金属玻璃基复合材料的单调拉伸行为。讨论了形状记忆合金的力学参数、体积分数、界面厚度和界面材料参数对金属... 详细信息

采用考虑塑性的超弹性材料模型和基于损伤塑性的准脆性材料模型,建立了三维单胞有限元模型,模拟了形状记忆合金颗粒增韧大块金属玻璃基复合材料的单调拉伸行为。讨论了形状记忆合金的力学参数、体积分数、界面厚度和界面材料参数对金属玻璃增韧效果的影响。结果表明:提高形状记忆合金的相变应变和马氏体塑性屈服应力将显著提高形状记忆合金颗粒增韧大块金属玻璃基复合材料的拉伸失效应变;形状记忆合金弹性模量超过50.0GPa、马氏体塑性屈服应力超过1.8GPa后,复合材料的拉伸失效应变变化不大。能同时兼顾失效应变和失效应力的形状记忆合金体积分数为15%左右。复合材料界面弹性模量和界面屈服应力的增加将提高复合材料的失效应力,但对失效应变影响不大;复合材料界面厚度的增加在提高失效应变的同时,也降低了复合材料的失效应力。

关键词：复合材料大块金属玻璃形状记忆合金增韧

Novel nanobubble technology in food science:Application and mechanism

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Food Innovation and Advances 2023年第2期2卷 135-144页

作者： Miral Javed Anam Matloob Fatima-ezzahra Ettoumi Arooj Rehman Sheikh ruyuan zhang Yanqun Xu Zhejiang University College of Biosystems Engineering and Food ScienceHangzhou 310058People's Republic of China National Institute of Food Science and Technology University of Agriculture FaisalabadPakistan Ningbo Innovation Centre Zhejiang UniversityNingbo 315100People's Republic of China Department of Organismic and Evolutionary Biology Harvard UniversityCambridgeMA 02138USA

Nanobubble technology is one of the latest green technologies in food industry ***(NBs)are gas-filled nanoscopic bubbles with a diameter of<500 *** mass production of bulk nano-bubbles raises growing interest due to their high stability,internal pressure,and an enormous surface-to-volume ***,they can increase surface area,alter the physicochemical characteristics of the medium,and facilitate mass *** with their size and stability,air,nitrogen,and carbon dioxide,NBs are widely recognized for their significance in food *** potential existence and ability of NBs to remain stable in liquids under ambient conditions have been a contentious issue for a long time due to the conventional thermodynamic *** this review,fundamental properties,and several generation methods of NBs have been described along with their ***,NBs generation methods can produce fine and undeviating gas diffusion characteristics,which can be used to control the uniformity and textural qualities of various creamy and gel-based ***,we also described the possible applications of NBs along with their mechanism of action in extraction,freezing,foams,and film *** ability of NBs to impart health benefits makes them new,improved,and environmentally safe green techniques.

关键词： mechanism theory bubble

具无限时滞的Lotka-Volterra方程的持续性

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生物数学学报 1998年第3期13卷 306-310页

作者：王克张入元东北师范大学数学系长春130024

本文研究了具无限时滞的Lotka-Volterra方程的持久性问题，给出了保证系统持久性的充分条件．

关键词： Lotka-Volterra方程无限时滞持久性

CENOZOIC VOLCANIC ROCK SERIES IN SOUTHEASTERN CHINA (Ⅱ)——TRACE ELEMENT GEOCHEMISTRY

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Science in China,Ser.B 1987年第7期 766-778页

作者：从柏林张儒瑗 Institute of Geology Academia Sinica Beijing

On the premise of the sister paper, the trace element geochemistry of Cenozoic volcanic rocks of southeastern China is discussed in detail in this paper. The data presented in this paper indicate that the upper mantle beneath the area studied is enriched in the strongly HYG elements as compared with the chondritic mantle, and that the depth of Cenozoic basaltic magma sources progressively increases from the coast to the inland. The Cenozoic basaltic volcanism has occurred in a geotectonic setting of rifting continental margin; on the contrary, the Mesozoic volcanic rocks are predominated by the felsic volcanics erupting in a geotectonic setting of active continental margin. It can be inferred from the studies of ultramafic inclusion-derived geotherm that the Cenozoic rifting of eastern China continent has been mainly controlled by the thermal mantle diapirism.

关键词： TRACE ELEMENT GEOCHEMISTRY CENOZOIC VOLCANIC ROCK SERIES IN SOUTHEASTERN CHINA HYGE REE

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高则诚、李孝光佚诗佚文考索

温州大学学报（社会科学版） 2007年第6期20卷 17-22页

作者：张如元温州大学美术与艺术设计学院浙江温州325035

高则诚、李孝光皆以文学成就著名于元末。可是他们的诗文集后来都散佚。李孝光的《五峰先生文集》在明代虽还侥幸残存,但也已远非原貌;《高则诚集》则是现代学者辑录的。他们的诗文辑佚工作均有待继续深入。

关键词：高则诚李孝光佚诗佚文

Spatial Distribution and Tectonic Evolution of Ultrahigh-P(UHP) and High-P(HP) Metamorphic Belts in Central and Eastern China

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资源环境与工程 2016年第B4期30卷 76-88页

作者： J.G.Liou W.G.Ernst Xiaomin WANG ruyuan zhang E.Eide Jun LIU S.Maruyama Leslie Ames Gaozhi ZHOU Yuanjun LIU Stanford University Standford California 94305 Tokyo University Komaba 153 - 8902 University of California Senta Barbara 93106 Hubei Bureau Geol. Mineral. Resource WuhanHubei 430022

In the Triassic suture between the Sino-Korean and Yangtze cratons,the Qinling-Dabie metamorphic complex includes three tectonic units: a northern migmatitic terrane（ P < 20 kb）,a central UHP coesite- and diamondbearing eclogite belt（20;40 kb）,and a southern HP blueschist-eclogite belt（5;12 kb）. Protoliths include continental basement of late Archean to Proterozoic granitic gneiss complexes,and mid-to late Proterozoic bimodal volcanics,platform carbonates,and turbidite sequences including peraluminous sediments. Some early Paleozoic rocks are included as protoliths in the HP belt. The metamorphic complex is segmented into several large blocks by NE-SW trending faults. Three（ Dabie,Hongan and Wudan） occur in central China,and an eastern extension,the Su-Lu block is displaced to the north by the Tanlu fault. The UHP rocks are best exposed in the Dabie and Su-Lu blocks,whereas HP blueschists occur throughout the Hongan and Wudan blocks. Widespread occurrence of conjugate faults in the metamorphic complex suggests differential doming after tectonic juxtaposition of the UHP and HP units at shallow crustal levels. Eclogites of the UHP belt occur as blocks in ultramafic rocks,marble and gneiss and as thin layers interbedded with gneiss; some contain coesite and coesite pseudomorphs in garnet,omphacite,kyanite and epidote. Microdiamond inclusions in garnet have been reported. C-type glaucophane-bearing eclogites are restricted to the Hongan HP belt and contain paragonite instead of kyanite. The coherent HP terrane displays progressive zonation from transitional blueschist / greenschist,through greenschist and epidote amphibolite to eclogite assemblages. The UHP and HP belts possess similar metamorphic trends,deformation features and record clockwise P-T paths. Disposition of the UHP belt to the north of the HP belt,the northward increase in metamorphic grade,and the southward vergence of structures suggest formation during northward underflow of a microcontinent beneath the

关键词： UHP Spatial Distribution and Tectonic Evolution of Ultrahigh-P and High-P HP Metamorphic Belts in Central and Eastern China