检索结果-南通市图书馆

Study on pneumatic-fuel hybrid system based on waste heat recovery from cooling water of internal combustion engine

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2013年第12期56卷 3070-3080页

作者： FANG YiDong LI DaoFei FAN ZhiPeng XU HuanXiang WANG Lei yu xiaoli Department of Energy Engineering Zhejiang University

The paper proposes a novel pneumatic-fuel hybrid system,which combines a traditional internal combustion engine(ICE)and a pneumatic *** important merit of this concept is that the system can recover waste from cooling water of internal combustion engine to optimize the working process of pneumatic engine,and thus to improve the entire efficiency of the hybrid ***,energy-saving effect due to lower cooling fan power can be achieved on ICE by waste heat recovery of pneumatic *** on thermodynamic analysis,an experimental system is designed and established for *** experimental results show that the performance of pneumatic engine is improved when the waste heat recovery concept of the hybrid system is *** an application example on a 4-cylinder engine is analyzed and discussed using numerical *** results show that the fan power of the ICE cooling system can be saved up to 50%by applying the hybrid *** the appreciable improvements on the energy efficiency with only limited system modifications when the concept is applied to traditional ICE based power systems,the proposed hybrid concept has the potential to serve as an alternative technology aiming for energy saving and emission reduction.

关键词： pneumatic engine pneumatic-fuel hybrid system waste heat recovery experimental study efficiency improvement

Improved spatio-temporal alignment measurement method for hull deformation

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2024年第2期35卷 485-494页

作者： XU Dongsheng yu yuanjin ZHANG xiaoli PENG Xiafu School of Automation Beijing Institute of TechnologyBeijing 100081China School of Aerospace Engineering Xiamen UniversityXiamen 361005China

In this paper,an improved spatio-temporal alignment measurement method is presented to address the inertial matching measurement of hull deformation under the coexistence of time delay and large misalignment *** misalignment angle and time delay often occur simultaneously and bring great challenges to the accurate measurement of hull deformation in space and *** proposed method utilizes coarse alignment with large misalignment angle and time delay estimation of inertial measurement unit modeling to establish a brand-new spatiotemporal aligned hull deformation measurement *** addition,two-step loop control is designed to ensure the accurate description of dynamic deformation angle and static deformation angle by the time-space alignment method of hull *** experiments illustrate that the proposed method can effectively measure the hull deformation angle when time delay and large misalignment angle coexist.

关键词： inertial measurement spatio-temporal alignment hull deformation

在线全文

学校读者我要写书评

暂无评论

高速公路出口智能机器人系统设计

机电工程技术 2024年第3期53卷 187-189页

作者：于晓丽陈卓雄孙晓伟广东省电子技术研究所广州510630 广州地铁集团有限公司广州510000

介绍一种高速公路出口智能机器人,它可完全取代人工收费,并可提供高效的异常定位和处理能力,同时具有良好的人机交互方式,可为车主提供客户服务,打造高效智能的无人收费站。该系统通过应用机器视觉识别技术、云服务技术、智能语音播报... 详细信息

介绍一种高速公路出口智能机器人,它可完全取代人工收费,并可提供高效的异常定位和处理能力,同时具有良好的人机交互方式,可为车主提供客户服务,打造高效智能的无人收费站。该系统通过应用机器视觉识别技术、云服务技术、智能语音播报技术、智能信息识别技术、智能道闸控制与管理技术等,通过对各技术的整合并应用于主控机、机芯单元、动环系统、车辆检测单元及读写单元、配电单元等,构成了一套高效的智能高速公路出口智能机器人系统。该系统实现了对车辆的自动识别,提高了计费和支付的效率,使机动车辆通过收费站时更加方便快捷。

关键词：智能机器人 ETC 收费系统高速公路无人收费站智慧高速

加味桃红四物汤联合常规消肿疗法治疗足踝部骨折肿胀临床研究

在线全文

学校读者我要写书评

暂无评论

新中医 2024年第13期56卷 18-22页

作者：余小梨张丽何赛赟焦利斌金华田氏骨科医院金华市中医医院外二科

目的：观察加味桃红四物汤联合常规消肿疗法治疗足踝部骨折肿胀的疗效。方法：选取118例气滞血瘀型足踝部骨折肿胀患者，按随机数字表法分为治疗组与对照组各59例。对照组给予常规消肿疗法治疗，治疗组给予加味桃红四物汤联合常规消肿... 详细信息

目的：观察加味桃红四物汤联合常规消肿疗法治疗足踝部骨折肿胀的疗效。方法：选取118例气滞血瘀型足踝部骨折肿胀患者，按随机数字表法分为治疗组与对照组各59例。对照组给予常规消肿疗法治疗，治疗组给予加味桃红四物汤联合常规消肿疗法治疗。2组均连续治疗7d。比较2组临床疗效及临床症状改善情况，比较2组治疗前后中医证候积分、肿胀程度、疼痛程度[疼痛视觉模拟评分法（VAS）]及血流变指标值（全血黏度、血浆比黏度）的变化。结果：治疗组总有效率为98.31%，对照组为88.14%,2组比较，差异有统计学意义（P<0.05）。治疗后，2组中医证候积分、肿胀程度、VAS评分均较治疗前下降（P<0.05），治疗组上述3项指标值均低于对照组（P<0.05）。治疗后，治疗组肿胀减轻时间、疼痛消失时间均早于对照组（P<0.05），踝关节背伸、踝关节屈曲度大于对照组（P<0.05）。治疗后，2组全血黏度、血浆比黏度指标值均较治疗前下降（P<0.05），治疗组全血黏度、血浆比黏度指标值均低于对照组（P<0.05）。结论：加味桃红四物汤联合常规消肿疗法治疗气滞血瘀型足踝部骨折肿胀患者有利于改善血液黏稠度，促进血液循环恢复，缓解临床症状，减轻骨折处肿胀、疼痛，缩短肿胀、疼痛改善时间，加速关节功能恢复。

关键词：足踝部骨折肿胀气滞血瘀型桃红四物汤

Study on the coupling calculation method for the launch dynamics of a self-propelled artillery multibody system considering engraving process

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第9期39卷 67-85页

作者： Shujun Zhang Xiaoting Rui Hailong yu xiaoli Dong Institute of Launch Dynamics Nanjing University of Science and TechnologyNanjing 210094China National Key Laboratory of Complex Multibody System Dynamics Nanjing 210094China

The launch dynamics theory for multibody systems emerges as an innovative and efficacious approach for the study of launch dynamics,capable of addressing the challenges of complex modeling,diminished computational efficiency,and imprecise analyses of system dynamic responses found in the dynamics research of intricate multi-rigid-flexible body systems,such as self-propelled *** advancement aims to enhance the firing accuracy and launch safety of self-propelled *** the shortfall of overlooking the band engraving process in existing theories,this study introduces a novel coupling calculation methodology for the launch dynamics of a self-propelled artillery multibody *** method leverages the ABAQUS subroutine interface VUAMP to compute the dynamic response of the projectile and barrel during the launch process of large-caliber self-propelled ***,it examines the changes in projectile resistance and band deformation in relation to projectile motion throughout the band engraving *** analysis of the computational outcomes with experimental data evidences that the proposed method offers a more precise depiction of the launch process of self-propelled artillery,thereby enhancing the accuracy of launch dynamics calculations for self-propelled artillery.

关键词： Self-propelled artillery Engraving process Multibody system dynamics Launch dynamics

Geochemical and Geological Characterization of Marine-Continental Transitional Shale: A Case Study in the Ordos Basin, NW China

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2020年第3期94卷 809-821页

作者： WEI Zhifu WANG Gen WANG Yongli MA Xueyun ZHANG Ting HE Wei yu xiaoli Key Laboratory of Petroleum Resources Research Gansu ProvinceNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Key Laboratory of Cenozoic Geology and Environment Institute of Geology and GeophysicsChinese Academy of SciencesCAS Center for Excellence in Life and PaleoenvironmentBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China

The organic-rich shale of the Shanxi and Taiyuan Formation of the Lower Permian deposited in a marinecontinental transitional environment are well developed in the Ordos Basin,NW China,which is considered to contain a large amount of shale hydrocarbon *** study takes the Lower Permian Shanxi and Taiyuan shale collected from well SL~# in the Ordos Basin,NW China as an example to characterize the transitional shale *** on organic geochemistry data,X-ray diffraction(XRD)analysis,field-emission scanning electron microscopy(FE-SEM)observations,the desorbed gas contents of this transitional shale were systematically studied and the shale gas potential was *** results indicate that the Lower Permian Shanxi and Taiyuan shale has a relatively high total organic carbon(TOC)(average TOC of 4.9%)and contains type III kerogen with a high mature to over mature *** analyses show that an important characteristic of the shale is that clay and brittle minerals of detrital origin comprise the major mineral composition of the marine-continental transitional shale samples,while the percentages of carbonate minerals,pyrite and siderite are relatively ***-SEM observations reveal that the mineral matrix pores are the most abundant in the Lower Permian shale samples,while organic matter(OM)pores are rarely *** analysis suggests that the mineral compositions mainly govern the macropore development in the marine-continental transitional shale,and mineral matrix pores and microfractures are considered to provide space for gas storage and *** addition,the desorption experiments demonstrated that the marine-continental transitional shale in the Ordos Basin has a significantly potential for shale gas exploration,ranging from 0.53 to 2.86 m^3/t with an average value of 1.25m^3/t,which is in close proximity to those of terrestrial shale(1.29 m^3/t)and marine shale(1.28 m^3/t).In summary,these results demonstrated that the L

关键词： marine-continental transitional shales desorbed gas pore structure FE-SEM Ordos Basin

在线全文

学校读者我要写书评

暂无评论

白术挥发油的化学成分及药理作用研究进展

中华中医药学刊 2024年第9期42卷 189-198,I0013页

作者：罗昭勇余晓历柳静蕾李博宁章柯滢王淑玲杭州师范大学药学院浙江杭州311121 广东药科大学中药学院广东广州510000

白术是一种药食同源的植物,具有补气健脾,燥湿利水的功效,挥发油是其主要的活性成分之一。通过查阅国内外相关文献,系统总结白术挥发油的化学成分、药理作用及某些标志性化合物,并比较了不同条件下白术挥发油成分差异。结果发现,白术挥... 详细信息

白术是一种药食同源的植物,具有补气健脾,燥湿利水的功效,挥发油是其主要的活性成分之一。通过查阅国内外相关文献,系统总结白术挥发油的化学成分、药理作用及某些标志性化合物,并比较了不同条件下白术挥发油成分差异。结果发现,白术挥发油的成分易受产地、采收期、药用部位、提取方法、储存条件和炮制工艺等因素影响,其挥发油中的108种化学成分可分为单萜、倍半萜、三萜、香豆素和苯丙素类及酯类。白术挥发油具有抗癌、抑菌、抗病毒、抗炎、抗氧化、镇痛等药理活性,可用于药物制剂、临床治疗、保健食品、化妆品等领域。综述白术挥发油的化学成分和药理作用研究进展,旨在为促进白术挥发油的深度开发和应用提供重要的参考依据。

关键词：白术挥发油化学成分药理作用

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

脑卒中营养管理的最佳证据总结

军事护理 2024年第9期41卷 91-94,112页

作者：凌克玉于晓丽邵军郭子宁陈述凡李海涵朱晓萍同济大学医学院上海200092 同济大学附属第十人民医院护理部上海200072 上海市第十人民医院崇明分院护理部上海202157

目的检索、评价并总结脑卒中营养管理的最佳证据,为临床应用提供参考。方法系统检索国内外指南网站、相关组织网站及数据库中关于脑卒中患者营养管理的证据,检索时限为建库至2024年4月。结果共纳入文献25篇,包括指南10篇、专家共识8篇... 详细信息

目的检索、评价并总结脑卒中营养管理的最佳证据,为临床应用提供参考。方法系统检索国内外指南网站、相关组织网站及数据库中关于脑卒中患者营养管理的证据,检索时限为建库至2024年4月。结果共纳入文献25篇,包括指南10篇、专家共识8篇、系统评价7篇,整理出32条最佳证据,包括多学科营养管理团队、营养不良风险因素、营养筛查与评估、住院期营养支持治疗、出院前健康教育与支持、出院后监测与随访共6个方面。结论总结了脑卒中全周期营养管理的最佳证据,可为医护人员制订脑卒中营养管理方案提供循证依据。

关键词：脑卒中营养证据总结循证护理

Spatiotemporal variation and freeze-thaw asymmetry of Arctic sea ice in multiple dimensions during 1979 to 2020

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2024年第3期43卷 102-114页

作者： yu Guo xiaoli Wang He Xu Xiyong Hou CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation Yantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China Shandong Key Laboratory of Coastal Environmental Processes Yantai 264003China University of Chinese Academy of Sciences Beijing 100049China

Arctic sea ice is broadly regarded as an indicator and amplifier of global climate *** rapid changes in Arctic sea ice have been widely ***,the spatiotemporal changes in the horizontal and vertical dimensions of Arctic sea ice and its asymmetry during the melt and freeze seasons are rarely quantified simultaneously based on multiple sources of the same long time *** this study,the spatiotemporal variation and freeze-thaw asymmetry of Arctic sea ice were investigated from both the horizontal and vertical dimensions during 1979–2020 based on remote sensing and assimilation *** results indicated that Arctic sea ice was declining at a remarkably high rate of–5.4×10^(4) km^(2)/a in sea ice area(SIA)and–2.2 cm/a in sea ice thickness(SIT)during 1979 to 2020,and the reduction of SIA and SIT was the largest in summer and the smallest in ***,compared with other sub-regions,SIA showed a sharper declining trend in the Barents Sea,Kara Sea,and East Siberian Sea,while SIT presented a larger downward trend in the northern Canadian Archipelago,northern Greenland,and the East Siberian *** to the seasonal trend of sea ice on sub-region scale,the reduction rate of SIA exhibited an apparent spatial heterogeneity among seasons,especially in summer and winter,i.e.,the sub-regions linked to the open ocean exhibited a higher decline rate in winter;however,the other sub-regions blocked by the coastlines presented a greater decline rate in *** SIT,the sub-regions such as the Beaufort Sea,East Siberian Sea,Chukchi Sea,Central Arctic,and Canadian Archipelago always showed a higher downward rate in all ***,a striking freeze-thaw asymmetry of Arctic sea ice was also *** sea ice changes in different dimensions,sea ice over most regions in the Arctic showed an early retreat and rapid advance in the horizontal dimension but late melting and gradual freezing in the vertical *** amount of sea ice me

关键词： Arctic sea ice sea ice area sea ice thickness spatiotemporal variation freeze-thaw asymmetry