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Thixotropy of Systems with Shear Thinning and Plastic Flow Behavior 预览
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作者 Dimiter Hadjistamov 《材料科学与工程:中英文B版》 2019年第2期56-65,共10页
The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We used therefore start-up experiments with constant shear r... The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We used therefore start-up experiments with constant shear rates and can speak consequently of shear stress instead of viscosity.The shear stress increases sharply at the beginning of the stress growth experiment,passes an overshoot and begins to decrease up to the steady state shear stress.We can assume that a stress growth curve with an overshoot points out to thixotropic behavior.After the steady state shear stress is reached,the shear deformation is stopped,and the stress relaxation begins.It is to be expected that the shear stress will recover after the stress relaxation.Systems with shear thinning and plastic flow behavior were examined.The thixotropy is discussed in relation to the flow behavior.Stress growth experiments were performed with shear rates from the first Newtonian region and from the shear thinning region of the systems with shear thinning flow behavior.Stress start-up experiments were carrying out with shear rates from the first and second yield stress regions and from the transition section of a system with plastic flow behavior. 展开更多
关键词 THIXOTROPY rheopexy SYSTEMS with SHEAR THINNING FLOW BEHAVIOR SYSTEMS with plastic FLOW BEHAVIOR time related FLOW behaviour.
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Levels and correlates of 24-hour movement behaviors among South Koreans:Results from the Korea National Health and Nutrition Examination Surveys,2014 and 2015
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作者 Eun-Young,Lee Valerie Carson +2 位作者 Justin Y.Jeon John C.Spence Mark S.Tremblay 《运动与健康科学:英文版》 SCIE 2019年第4期376-385,共10页
Purpose.This study aimed to examine the levels and correlates of 24-h movement behaviors(i.e.,physical activity,sedentary time,and sleep),and different patterns of these behaviors in a nationally representative sample... Purpose.This study aimed to examine the levels and correlates of 24-h movement behaviors(i.e.,physical activity,sedentary time,and sleep),and different patterns of these behaviors in a nationally representative sample of South Koreans aged 12 years and older.This study also aimed to examine the sociodemographic correlates of 24?h movement behaviors stratified by age groups.Methods.Self-reported,repeated cross-sectional data from 10,708 participants in the 2014 and 2015 Korea National Health and Nutrition Examination surveys were used.Key variables included moderate-to-vigorous intensity physical activity,muscular strengthening exercises,walking,active transportation,sedentary time,and sleep.Sociodemographic variables included age,sex,household income,area of residence,and education level.Descriptive statistics by sex and age as well as general linear models by age group were performed.Results.The proportions of individuals meeting the moderate-to-vigorous intensity physical activity,muscular strengthening exercises,and sleep guidelines were,respectively,21.6%,22.1%,and 32.5%in male youth;6.9%,4.5%,and 22.8%in female youth;55.5%,30.8%,and 54.0%in male adults;48.8%,14.4%,and 57.6%in female adults;44.0%,30.6%,and 45.5%in male older adults;and 29.5%,8.9%,and 37.3%in female older adults.The proportions of individuals showing the most ideal combinations of 24-h movement behaviors were only 3.2%in youth,0.4%in adults,and 0 in older adults.Universally,older age,female sex,or living in metro Seoul were associated with unfavorable patterns of 24-h movement behaviors across different age groups.However,the associations of income and education with movement behaviors were mixed across age groups.Conclusion.Overall,the proportion of South Koreans with a healthy 24-h movement behavior pattern is low.The sociodemographic correlates of different types of 24-h movement behaviors should be considered when designing targeted interventions for the promotion of healthy active living for South Koreans. 展开更多
关键词 24-h movement BEHAVIOR BEHAVIORAL epidemiology Guideline ADHERENCE HEALTH BEHAVIOR surveillance
Optimization of gas tungsten arc welding parameters for the dissimilar welding between AISI 304 and AISI 201 stainless steels 预览
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作者 Wichan Chuaiphan Loeshpahn Srijaroenpramong 《Defence Technology(防务技术)》 CAS CSCD 2019年第2期170-178,共9页
This present study applied gas tungsten arc welding in order to join AISI 304 and AISI 201 stainless steels.The objective was to find the optimum welding condition that gave a weld bead in accordance with DIN EN ISO 2... This present study applied gas tungsten arc welding in order to join AISI 304 and AISI 201 stainless steels.The objective was to find the optimum welding condition that gave a weld bead in accordance with DIN EN ISO 25817 quality level B,pitting corrosion potential of the weld metal of not less than that of the AISI 304 base metal and a ratio of delta-ferrite in austenite matrix of the weld metal of not lower than 3%.Such a ratio is a criterion widely accepted to protect the weld metal from solidification cracking.At the welding current of 75 A and by using pure argon as a shielding gas 0 to 8 vol.%and applying a welding speed in the range of 2e3.5mm·s^-1 was found to give a complete weld bead with an increased depthper-width ratio(promote weldability).For welding speed in the range of 3 and 3.5mmmm·s^-1(promote corrosion resistance).Increasing the welding speed in such a range decreased the amount of delta-ferrite in the austenite matrix,and increased the pitting corrosion potential of the weld metal to be 302 mVSCE.This value was still lower than the pitting corrosion potential of the AISI 304 base metal.Mixing nitrogen in argon shielding gas increased the nitrogen content in the weld.The optimum condition was found when using a welding speed of 3mm·s^-1 and mixing 1 vol.%of nitrogen in the argon shielding gas(promote weldability and corrosion resistance).Pitted areas after potentiodynamic test were observed in the austenite in which its Cr content was relatively low. 展开更多
关键词 Dissimilar WELDMENT AISI 304 STAINLESS STEEL AISI 201 STAINLESS STEEL Gas tungsten arc welding(GTAW) Nitrogen Corrosion BEHAVIOR Mechanical BEHAVIOR
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Consumer heterogeneity and online vs. offline retail spatial competition
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作者 Mingming Shi Jun Zhou Zhou Jiang 《中国工商管理研究前沿:英文版》 2019年第2期231-249,共19页
This paper develops a game-theoretic spatial model featuring consumer heterogeneity in online vs. offline retailers* spatial competition. We find that consumers1 browse-and-switch behavior intensifies the competition ... This paper develops a game-theoretic spatial model featuring consumer heterogeneity in online vs. offline retailers* spatial competition. We find that consumers1 browse-and-switch behavior intensifies the competition because both offline and online retailers' price and profit decline when the behavior occurs, but it is not necessarily a threat to offline retailers especially when the product relates more closely to experience. We consider six equilibrium seenarios for different combi nations of consumer behaviors when considering a hybrid retailer. The analysis taking consumer heterogeneity into consideration shows that the hybrid retailer operating both online and offline is not always the winner. Particularly, the business opportunity for the offline retailer lies in consumersz willingness to pay in store, and whether the retailer launches an online store depends on the type of products and services provided. 展开更多
关键词 Spatial competition ONLINE retailing Browse-and-switch BEHAVIOR CONSUMER heterogeneity CONSUMER BEHAVIOR China Circular city model
基于计划行为理论的培训在ICU护士倡导器官捐献中的应用
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作者 刘博秀 《中华现代护理杂志》 2019年第2期236-238,共3页
目的探讨基于计划行为理论(TPB)的教育方案对ICU护士倡导器官捐献的行为意愿的影响。方法采用目的抽样法,选取2017年8-11月哈尔滨某三级甲等医院外科ICU、心外ICU和急诊创伤ICU护士122名为研究对象,采用随机数字表法将护士分为试验组(n=... 目的探讨基于计划行为理论(TPB)的教育方案对ICU护士倡导器官捐献的行为意愿的影响。方法采用目的抽样法,选取2017年8-11月哈尔滨某三级甲等医院外科ICU、心外ICU和急诊创伤ICU护士122名为研究对象,采用随机数字表法将护士分为试验组(n=60)和对照组(n=62)。试验组进行基于TPB的教育方案的培训,对照组仅发给1份医院常规器官捐献宣传手册。干预前后采用ICU护士器官捐献倡导行为问卷对两组护士进行调查。结果干预前两组护士器官捐献倡导行为问卷得分差异无统计学意义(P>0.05),干预后试验组护士器官捐献倡导行为问卷得分(2.85±0.36)分,高于对照组的(2.57±0.43)分,差异有统计学意义(t=3.893,P<0.01)。结论基于TPB的教育方案比传统宣传手段提高了ICU护士倡导器官捐献的行为意愿,有助于器官捐献事业的开展。 展开更多
关键词 行为 计划行为理论 重症监护病房 器官捐献 教育
新媒体对大学生网络创业行为影响的作用机理研究 预览
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作者 王纯 尹晨璐 +2 位作者 庞雅宁 曹潇潇 薛杉 《江苏商论》 2019年第6期102-105,共4页
随着新媒体的广泛应用,大学生逐渐青睐于网络创业,研究新媒体对于大学生网络创业行为的影响和作用,能够助力大学生网络创业的开展,推动我国创新创业建设。本文把握新媒体时代特征,剖析新媒体的关键因素对大学生网络创业行为的作用机理,... 随着新媒体的广泛应用,大学生逐渐青睐于网络创业,研究新媒体对于大学生网络创业行为的影响和作用,能够助力大学生网络创业的开展,推动我国创新创业建设。本文把握新媒体时代特征,剖析新媒体的关键因素对大学生网络创业行为的作用机理,通过文献分析并基于Timmons创业三要素模型构建机理模型,结合大学生网络创业实例分析和验证。得出结论,新媒体传播方式多样性、传播速度即时性和传播主体互动性的特征,通过大学生网络创业资源投入少、团队交流便捷广泛和机会创新与多样化的中介效应,从而影响大学生网络创业行为。最后,从国家、高校和学生三个角度提出政策建议。 展开更多
关键词 新媒体 网络创业 大学生 行为 Timmons创业模型
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A study on English as a lingua franca:learner perspectives and English learning behavior of Chinese English majors 预览
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作者 张红阳 《校园英语》 2019年第27期65-66,共2页
The present study aims to investigate into how Chinese English majors’perspectives of ELF(English as alingua franca)are affecting their behavior in English learning.The data are drawn from in-depth interviews with a ... The present study aims to investigate into how Chinese English majors’perspectives of ELF(English as alingua franca)are affecting their behavior in English learning.The data are drawn from in-depth interviews with a group of Chinese English majors and are analyzed using qualitative approaches.Tentative results of the analysis would lead to some further discussion about the influenc es of Chinese English majors’perspec tives on ELF on their English learning behavior.It is hoped that some constructive and practical suggestions could be made on the improvement and further development of English teaching and learning in China. 展开更多
关键词 ENGLISH as a lingua franca Chinese ENGLISH majors ENGLISH learning BEHAVIOR ENGLISH TEACHING
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Microstructural evolution and age-hardening behavior of quasicrystal-reinforced Mg-Dy-Zn alloy
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作者 Guang-Li Bi Yu-Xiang Han +3 位作者 Jing Jiang Chun-Hong Jiang Yuan-Dong Li Ying Ma 《稀有金属:英文版》 SCIE EI CAS CSCD 2019年第8期739-745,共7页
Microstructural evolution and age-hardening behavior of Mg-2 Dy-6 Zn(at%)alloy during solid-solution and aging treatment were investigated.The microstructure of as-cast alloy is composed of a-Mg,Mg3 DyZn6(Ⅰ)phase,Mg3... Microstructural evolution and age-hardening behavior of Mg-2 Dy-6 Zn(at%)alloy during solid-solution and aging treatment were investigated.The microstructure of as-cast alloy is composed of a-Mg,Mg3 DyZn6(Ⅰ)phase,Mg3 Dy2 Zn3(W)phase,Mg(Zn,Dy)phase and a small amount of Mg0.97Zn0.03 phases.After solid-solution treatment(480℃,12 h),all the I phases and most W phases dissolve into a-Mg matrix and the remainder W phases transform into Mg(Dy,Zn)phase and MgDy3 phase.During aging treatment,I phase and small amounts of W phases co-precipitate from α-Mg matrix,respectively.The alloy exhibits a peak hardness of HV 77.5 at 200 ℃ for 8 h.The excellent age-hardening behavior of alloy is mainly attributed to the co-precipitation strengthening of I and W phases. 展开更多
关键词 Mg-Dy-Zn ALLOY Microstructure I phase AGE-HARDENING BEHAVIOR
Pea leafminer Liriomyza huidobrensis (Diptera: Agromyzidae) uses vibrational duets for efficient sexual communication
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作者 Jin Ge Jia-Ning Wei +3 位作者 Ding-Jie Zhang Chun Hi De-Zhi Zheng Le Kang 《昆虫科学:英文版》 SCIE CAS CSCD 2019年第3期510-522,共13页
The pea leafminer (Liriomyza huidobrensis) is a notorious pest of vegetables and ornamental plants worldwide. Despite a large number of studies on its biology and ecology, the courtship behavior and sexual communicati... The pea leafminer (Liriomyza huidobrensis) is a notorious pest of vegetables and ornamental plants worldwide. Despite a large number of studies on its biology and ecology, the courtship behavior and sexual communication of this species remain unclear. Here, we studied vibrational communication in the sexual interaction of the pea leafminer. On host plant leaves, females and males behaviorally displayed the bobbing-quivering alternation, which finally led to copulation. Moreover, records of laser vibrometry revealed threesignal duets underlying the behavioral alternation. Sexually mature males spontaneously emitted calls (MCs) to initiate the duets. The females rapidly responded to MCs by emitting replies (FRs) that are longer in duration. The FRs further triggered male replies (MRs) in their search for potential partners. Leafminer-produced vibrational signals convey efficient information to partners and generate pair formation on stretched substrates, such as plant leaves and nylon mesh, but cannot elicit responses on dense substrates, such as glass and plastic. Vibrational playbacks of both MCs and FRs can elicit replies in females and males, respectively. This study completely characterizes substrate-borne vibrational duets in a dipteran insect. The discovery of vibrational sex signals in the pea leafminer provides new insights for the development of novel approaches to control the pest and its relative species. 展开更多
关键词 biotremology COURTSHIP behavior LIRIOMYZA VIBRATIONAL communication
有意愿无行为:农民秸秆资源化意愿与行为相悖问题探究——基于MOA模型的实证
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作者 张童朝 颜廷武 +1 位作者 何可 张俊飚 《干旱区资源与环境》 CSSCI CSCD 北大核心 2019年第9期30-35,共6页
文中利用鲁鄂冀皖四省1372份农户调研数据,基于MOA模型,通过对秸秆还田的考察探究了农民秸秆资源化利用意愿与行为相悖离的原因。结果发现:(1)36.81%的农民秸秆资源化利用意愿与行为相悖离,且多表现为'有意愿而无行为',占比28.6... 文中利用鲁鄂冀皖四省1372份农户调研数据,基于MOA模型,通过对秸秆还田的考察探究了农民秸秆资源化利用意愿与行为相悖离的原因。结果发现:(1)36.81%的农民秸秆资源化利用意愿与行为相悖离,且多表现为'有意愿而无行为',占比28.64%;(2)农民秸秆资源化的动机(3.76)>机会(3.38)>能力(2.71),三者的改进对于农民秸秆资源化意愿转化为行为具有促进作用;(3)机会的强化能够增强动机和能力在农民意愿向行为转化中的积极效应。据此,着重增强农民相应的个体能力并提升外部条件,以改进秸秆利用成本收益比,是推进农民秸秆资源化意愿付诸行动的治本之策。 展开更多
关键词 秸秆资源化 意愿 行为 MOA 悖离
Visual-spatial neglect after right-hemisphere stroke:behavioral and electrophysiological evidence
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作者 Lin-Lin Ye Lei Cao +3 位作者 Huan-Xin Xie Gui-Xiang Shan Yan-Ming Zhang Wei-Qun Song 《中华医学杂志:英文版》 SCIE CAS CSCD 2019年第9期1063-1070,共8页
Background:Visual-spatial neglect (VSN) is a neuropsychological syndrome,and right-hemisphere stroke is the most common cause.The pathogenetic mechanism of VSN remains unclear.This study aimed to investigate the behav... Background:Visual-spatial neglect (VSN) is a neuropsychological syndrome,and right-hemisphere stroke is the most common cause.The pathogenetic mechanism of VSN remains unclear.This study aimed to investigate the behavioral and event-related potential (ERP) changes in patients with or without VSN after right-hemisphere stroke.Methods:Eleven patients with VSN with right-hemisphere stroke (VSN group) and 11 patients with non-VSN with righthemisphere stroke (non-VSN group) were recruited along with one control group of 11 age- and gender-matched healthy participants.The visual-spatial function was evaluated using behavioral tests,and ERP examinations were performed.Results:The response times in the VSN and non-VSN groups were both prolonged compared with those of normal controls (P<0.001).In response to either valid or invalid cues in the left side,the accuracy in the VSN group was lower than that in the non-VSN group (P<0.001),and the accuracy in the non-VSN group was lower than that in controls (P<0.05).The P1 latency in the VSN group was significantly longer than that in the control group (F[2,30]= 5.494,P = 0.009),and the N1 amplitude in the VSN group was significantly lower than that in the control group (F[2,30]= 4.343,P = 0.022).When responding to right targets,the lefthemisphere P300 amplitude in the VSN group was significantly lower than that in the control group (F[2,30]= 4.255,P = 0.025).With either left or right stimuli,the bilateral-hemisphere P300 latencies in the VSN and non-VSN groups were both significantly prolonged (all P<0.05),while the P300 latency did not differ significantly between the VSN and non-VSN groups (all P > 0.05).Conclusions:Visual-spatial attention function is impaired after right-hemisphere stroke,and clinicians should be aware of the subclinical VSN.Our findings provide neuroelectrophysiological evidence for the lateralization of VSN. 展开更多
关键词 Visual-spatial NEGLECT Right-hemisphere STROKE Behavior Electrophysiology EVENT-RELATED potentials Response time
Hydraulics and swimming behavior of schizothorax prenanti in vertical slot fishways 预览
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作者 Rui-dong An Jia Li +1 位作者 Wen-min Yi Xi Mao 《水动力学研究与进展:英文版》 SCIE EI CSCD 2019年第1期169-176,共8页
This paper presents a novel experiment for the correlation between the hydraulics and the swimming behavior of Schizothorax prenanti,a rare species of fish in southwest China,in passing a vertical slot fishway.With an... This paper presents a novel experiment for the correlation between the hydraulics and the swimming behavior of Schizothorax prenanti,a rare species of fish in southwest China,in passing a vertical slot fishway.With an acoustic Doppler velocimeter,the velocities of a physical model in the equidimension fishway in the Shaping II power station are measured.The hydraulic parameters include the hydraulic head drop,the velocity patterns and the flow rate,and the swimming behavior includes the burst-coast,the sustained swimming and the migratory path,and they are analyzed under the test conditions.The sustained swimming velocity is in the range from 0.65m/s to 1.09m/s.The estimated hydraulic head drop of each pool is calculated and is in the range from 0.08-0.11 m,which means that 2.6% slope is reasonable.For the same slope,the maximum velocity is further reduced from 1.24 m/s to 1.14 m/s by using an L shape baffle structure.The above findings are used as the basis to evaluate the hydraulic performance of the fishways,where the L shape baffle structure is expected to be effective tor creating a preterencial flow for the fish.For the main stream of the pool,an "Ω" shape flow pattern is more fish-friendly,which can effectively extend the energy dissipation distance and avoid the bursting through a high velocity zone.This paper provides a useful complementary tool for practical designs. 展开更多
关键词 Hydraulics SWIMMING behavior VERTICAL SLOT FISHWAYS burst-coast energy DISSIPATION
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菏泽学院在校大学生结核病认知行为调查
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作者 郑蓉 赵国臣 《中国校医》 2019年第8期568-568,576共2页
目的了解菏泽学院在校生对结核病知识的认知情况,为在校大学生开展防结核病知识的健康教育提供科学合理依据。方法采取随机抽样法,以不记名问卷方式,对900名在校学生进行调查。结果大学生对结核病防治核心知识知晓率为81%,其中结核病高... 目的了解菏泽学院在校生对结核病知识的认知情况,为在校大学生开展防结核病知识的健康教育提供科学合理依据。方法采取随机抽样法,以不记名问卷方式,对900名在校学生进行调查。结果大学生对结核病防治核心知识知晓率为81%,其中结核病高发部位,结核病的主要传播途径,肺结核病的主要症状的知晓率分别为91%、86%、84%。而肺结核的扩展知识的知晓率较低,仅为60.56%。结论加强在校大学生防结核病知识的全面健康教育很有必要。 展开更多
关键词 大学生 结核 健康知识 行为 实践
徐州市中小学生超重肥胖与家庭行为因素的关系
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作者 吴海宏 乔程 +5 位作者 郝孟娟 孙中慧 王艳梅 娄培安 张峰 常桂秋 《中国学校卫生》 CAS 北大核心 2019年第7期1001-1004,共4页
目的分析徐州市6~14岁中小学生超重肥胖与家庭行为因素的关系,为有针对性地制定相应防控策略提供依据。方法采用多阶段分层整群随机抽样的方法,确定徐州市10所小学、10所初中的6220名学生作为研究对象,通过χ^2检验和多因素Logistic逐... 目的分析徐州市6~14岁中小学生超重肥胖与家庭行为因素的关系,为有针对性地制定相应防控策略提供依据。方法采用多阶段分层整群随机抽样的方法,确定徐州市10所小学、10所初中的6220名学生作为研究对象,通过χ^2检验和多因素Logistic逐步回归分析家庭行为因素与中小学生超重肥胖的关系。结果中小学男生超重肥胖率均高于女生,城市高于农村(P值均<0.05)。单因素分析显示,与中小学男生超重肥胖相关的家庭行为因素主要有父母肥胖、早餐不规律、吃快餐、喜食甜食、饮含糖饮料、视屏时间长及睡眠时间短,与中小学女生超重肥胖相关的家庭行为因素主要有父母肥胖、早餐不规律、吃快餐及喜食甜食(P值均<0.05)。此外,饮含糖饮料及睡眠时间短与小学女生、视屏时间长与中学女生超重肥胖均存在关联(P值均<0.05)。Logistic回归分析显示,与小学生超重肥胖相关的家庭行为因素主要有早餐不规律(OR男=1.58,OR女=1.74)、吃快餐(OR男=1.37,OR女=1.11)、喜食甜食(OR男=1.85,OR女=1.52)、饮含糖饮料(OR男=1.64,OR女=1.33)及睡眠时间短(OR男=1.56,OR女=1.69);视屏时间长与小学男生超重肥胖相关(OR=1.18)。与中学生超重肥胖相关的家庭行为因素主要有父母肥胖(OR男=1.29,OR女=1.23)及喜食甜食(OR男=1.44,OR女=1.51);与中学男生超重肥胖相关的家庭行为因素还包括早餐不规律(OR=1.51)、吃快餐(OR=1.22)、饮含糖饮料(OR=1.75)及视屏时间长(OR=1.15)。结论家庭行为因素与中小学生超重肥胖存在关联,且影响中小学生超重肥胖的家庭行为因素有所不同。应采取以家庭为基础的行为干预方式,做好中小学生超重肥胖防制工作。 展开更多
关键词 超重 肥胖症 家庭 行为 学生
Cultivation Countermeasures of Farmers’ Ecological Consciousness and Behavior in Eco-civilization Construction——A Case Study of Agricultural Waste Recycling 预览
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作者 Chengying HAN Min TIAN +1 位作者 Biyan XIAO Zhenhong QI 《亚洲农业研究:英文版》 2019年第4期48-53,共6页
Farmer is the main body of rural environmental behavior,and cultivation of farmers’ ecological consciousness and behavior is important to rural environmental governance and rural eco-civilization construction. In thi... Farmer is the main body of rural environmental behavior,and cultivation of farmers’ ecological consciousness and behavior is important to rural environmental governance and rural eco-civilization construction. In this paper,agricultural waste recycling is studied based on individual behavior theory. We analyze status quo of agricultural waste recycling by farmers,and point out the importance of farmer behavior in eco-environment governance,thereby excavating influence factors of agricultural waste recycling by farmers from perceived benefits and perceived risks. On this basis,countermeasures and measures of cultivating farmers’ environmental protection behavior and ecological consciousness are proposed. 展开更多
关键词 ECOLOGICAL CIVILIZATION ECOLOGICAL CONSCIOUSNESS ECOLOGICAL BEHAVIOR CULTIVATION
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护士糖尿病管理知识、态度、行为、能力的研究进展 预览
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作者 付聪慧 马西文 +1 位作者 杜慧平 李静 《全科护理》 2019年第2期161-163,共3页
介绍护士糖尿病管理知识、态度、行为、能力的现状及影响因素,以期为制订糖尿病培训方案提供参考和依据。
关键词 护士 糖尿病 知识 态度 行为 能力
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耳鸣动物模型概述 预览
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作者 李金飞 贾志姣(综述) 丁雷(审校) 《中国听力语言康复科学杂志》 2019年第1期32-34,共3页
本文对耳鸣动物模型制作方法进行整理归纳,涵盖经典的饮水抑制法、跳台反射法、声音惊吓刺激反射法,以及多种由此演化改进的模型制作方法,并探讨“肝郁脾虚证”耳鸣大鼠模型的制作,以便于相关研究应用。
关键词 耳鸣 动物模型 行为学 肝郁脾虚
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Enhanced Strength and Corrosion Resistance of Mg–2Zn–0.6Zr Alloy with Extrusion
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作者 Luan-Xiang Wang Ren-Bo Song +1 位作者 Chang-Hong Cai Jing-Yuan Li 《金属学报:英文版》 SCIE EI CAS CSCD 2019年第1期10-22,共13页
The microstructure, mechanical properties and corrosion behavior of Mg–2 Zn–0.6 Zr alloy under the as-cast and asextruded conditions were investigated. Microstructure analysis indicated the remarkable grain refineme... The microstructure, mechanical properties and corrosion behavior of Mg–2 Zn–0.6 Zr alloy under the as-cast and asextruded conditions were investigated. Microstructure analysis indicated the remarkable grain refinement by extrusion, as well as notable reductions in volume fraction and size of precipitate phases. As compared with the as-cast alloy, the asextruded alloy exhibited better mechanical performance, especially in yield strength which was promoted from 51 to 194 MPa. Refined grains, dispersive precipitate phases and texture were thought to be the main factors affecting the improved performance in strength. The electrochemical measurement and immersion test revealed the corrosion rate of Mg–2 Zn–0.6 Zr alloy by extrusion decreased from 1.68 to 0.32 mm/year. The reasons for the enhanced corrosion resistance were mainly attributed to the decreased volume fraction and Volta potential of the precipitate phases, the refinement of the grain size, as well as the formation of more protective corrosion film. 展开更多
关键词 Mg–2Zn–0.6Zr EXTRUSION STRENGTH CORROSION BEHAVIOR
论养猪场户的病死猪无害化处理行为 预览
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作者 李晓慧 张园园 孙世民 《科技和产业》 2019年第7期68-71,共4页
病死猪无害化处理事关食品安全、环境安全、畜牧业生产安全。首先提出并论证了养猪场户病死猪无害化处理行为的概念、内涵和内容,然后基于第一手资料概括总结出了养猪场户病死猪处理行为的现状与问题,最后从提高认知水平和处理能力两方... 病死猪无害化处理事关食品安全、环境安全、畜牧业生产安全。首先提出并论证了养猪场户病死猪无害化处理行为的概念、内涵和内容,然后基于第一手资料概括总结出了养猪场户病死猪处理行为的现状与问题,最后从提高认知水平和处理能力两方面提出了促进养猪场户病死猪无害化处理行为的对策建议。 展开更多
关键词 养猪场户 病死猪 无害化处理 行为
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南昌市城镇就业居民自我保健意识调研报告 预览
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作者 周美娟 耿炤 +1 位作者 宋路遥 刘巧丽 《中国卫生标准管理》 2019年第11期8-14,共7页
目的通过对目标群体的自我保健意识、自身健康状态调研,分析南昌市整体就业群体的身体素质及自我保健意识及现状。方法通过问卷调研、访谈及查阅资料等形式,了解南昌市青壮年群体的健康信息,保健方面的消费行为及消费反馈信息等相关方... 目的通过对目标群体的自我保健意识、自身健康状态调研,分析南昌市整体就业群体的身体素质及自我保健意识及现状。方法通过问卷调研、访谈及查阅资料等形式,了解南昌市青壮年群体的健康信息,保健方面的消费行为及消费反馈信息等相关方面的数据,分析不同工作强度、不同性别、不同工作环境下的人身体状态有什么差别,总体之间有无显著差异。结果受访人群的基本信息,包括性别、年龄、身高、体重、学历、行业、工时、岗位种类、工作模式以及工作环境信息显示,受访人群主要行业分布类型与全国分布大体一致,其中性别比例为(男:女)1.36:1,年龄比例主要以20~29岁为主并逐渐下降,性别、年龄、教育程度、工作与运动特征与BMI规律符合一般认识。从饮食行为、生活行为、自我保健意识行为、身体健康状态等角度进行了评分分析,各项评分分别为3.4,3.2,2.5和3.3。其中,自我保健意识行为与受访人群特征具有相关性。随着年龄和学历的增加,受访人数逐渐减少,通过方差分析发现自我保健意识行为与生活行为相关性更大,与身体健康状态的相关性最小。结论在自我保健意识行为中,男女之间几乎无差异。国有企业、职能类、上行政班、在实验室工作的这4种居民自我保健意识最强。且随着年龄、学历的增长,居民的自我保健意识越强。受访人群越重视自我保健意识、每周锻炼的时间越长、近一年在保健品上的支出越多,其自我保健意识行为得分也越高。服用过保健品以及今后考虑要服用保健品的受访人群,自我保健意识行为得分也更高。生活习惯、运动仍旧是保健支出首选。 展开更多
关键词 南昌市 就业居民 自我保健 意识 行为 生活习惯 运动
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