检索结果-南通市图书馆

ICU成人机械通气患者口渴管理的最佳证据总结

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

国际医药卫生导报 2024年第10期30卷 1730-1734页

作者：卞红俞萍周之音何平孙芹无锡市第二人民医院ICU 无锡214002 无锡市第二人民医院护理部无锡214002

目的总结重症监护室(ICU)成人机械通气患者口渴管理的相关证据,同时归纳最佳证据。方法系统检索国内外数据库关于ICU成人机械通气患者口渴管理的相关文献,文献包括指南、临床决策、系统评价、证据总结、原始研究、推荐实践、最佳临床实... 详细信息

目的总结重症监护室(ICU)成人机械通气患者口渴管理的相关证据,同时归纳最佳证据。方法系统检索国内外数据库关于ICU成人机械通气患者口渴管理的相关文献,文献包括指南、临床决策、系统评价、证据总结、原始研究、推荐实践、最佳临床实践信息册。检索时限为建库至2023年6月30日。2名研究人员负责评价纳入医学文献数据库、PubMed、国际指南图书馆、中国指南网、英国国家临床医学研究文献的质量,同时负责与质量标准相符文献的证据提取。结果最终纳入证据10篇,其中4篇为系统评价,3篇为随机对照试验(RCT),1篇专家共识,2篇证据总结。分别从ICU成人机械通气患者口渴的影响因素、评估内容、评估工具、干预措施、效果评价及人员管理6个方面,形成16条最佳证据。结论在临床应用证据方面,应对所处医院的临床条件/环境、医护方应用证据的积极因素与消极因素、患者意愿等展开评估,开展有针对性的证据选择。在时间推移下,最佳证据持续更新,应用者还应持续更新证据,通过科学的护理手段有效应对成人危重症患者口渴管理问题,促进护理质量的提升。

关键词：重症监护室机械通气口渴管理循证护理证据总结

在线全文

学校读者我要写书评

暂无评论

空冷汽轮发电机喘振现象的分析及处理

燃气轮机技术 2024年第3期37卷 33-40页

作者：赖晓华彭晓燕边运朝东莞市粤湾新能源有限公司广东东莞523000

为解决燃气-蒸汽联合循环分轴机组启动过程中空冷汽轮发电机单侧进风温度异常升高问题,通过分析该类型机组的汽轮机在冲转升速过程空冷汽轮发电机两端进风温度的温升、发电机端部声音、端盖振动情况、发电机密闭式空气循环通风系统,发... 详细信息

为解决燃气-蒸汽联合循环分轴机组启动过程中空冷汽轮发电机单侧进风温度异常升高问题,通过分析该类型机组的汽轮机在冲转升速过程空冷汽轮发电机两端进风温度的温升、发电机端部声音、端盖振动情况、发电机密闭式空气循环通风系统,发现空冷汽轮发电机两端冷却风机具有并联运行轴流风机的特点,某些情况下会发生旋转失速或喘振现象,提出升速过程空冷发电机单侧进风温度快速异常升高是密闭式循环空冷发电机喘振的重要特征。采取相应措施,基本解决了同类型空冷汽轮发电机单侧进风温度异常升高问题,对新建或已投运的同类型机组有借鉴意义。

关键词：空冷汽轮发电机单侧进风温度密闭并联运行喘振

Synthesis and Crystal Structure of zn(II) Complex with Tridentate Ligand N-(2-Hydroxy-1-naphthylidene)-L-serine

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2006年第8期25卷 915-918页

作者： YU Qing LI Chun-Ying bian He-Dong HUANG Fu-Ping LIANG Hong College of Chemistry and Chemical Engineering Guangxi Normal University Guilin 541004 China

A new zn（Ⅱ） complex, [zn（L）2（H2O）2], where H2L = N-（2-hydroxy-1-naphthyli- dene）-L-sedne, has been synthesized and characterized by single-crystal X-ray diffraction. The crystal belongs to monoclinic system, space group C2/c with a = 13.669（2）, b = 6.4657（9）, c = 31.463（5） A, β = 98.010（2）°, V = 2753.6（7） A^3, z = 8, Mr = 358.64, Dc = 1.730 g/cm^3, F（000） = 1472,μ（MoKa） = 1.814 mm^-1, the final R = 0.0355 and wR = 0.0706. The zn（Ⅱ） atom adopts a square-pyramidal geometry coordinated by the tridentate ligand and two water molecules. Intermolecular hydrogen bonds link the complex molecules into a two-dimensional layer.

关键词： Schiff base zn(Ⅱ) complex crystal structure

Radio Luminosity,Black Hole Mass and Eddington Ratio for Quasars from the Sloan Digital Sky Survey

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Astronomy and Astrophysics 2008年第5期8卷 522-536页

作者： Wei-Hao bian Yan-Mei Chen Chen Hu Kai Huang Yan Xu Department of Physics and Institute of Theoretical Physics Nanjing Normal University Nanjing210097 China Key Laboratory for Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China

We investigate the MBH-σ＊ relation for radio-loud quasars with redshifl z 〈 0.83 in Data Release 3 of the Sloan Digital Sky Survey （SDSS）. The sample consists of 3772 quasars with better models of the H/4 and [O Ⅲ] lines and available radio luminosity, including 306 radio-loud quasars, 3466 radio-quiet quasars with measured radio luminosity or upper-limit of radio luminosity （181 radio-quiet quasars with measured radio luminosity）. The virial supermassive black hole mass （MBH） is calculated from the broad Hβline, and the host stellar velocity dispersion （σ＊） is traced by the core [O Ⅲ] gaseous velocity dispersion. The radio luminosity and radio loudness are derived from the FIRST catalog. Our results are as follows：（1） For radio-quiet quasars, we confirm that there is no obvious deviation from the MBH-σ＊ relation defined for inactive galaxies when the uncertainties in ~IBH and the luminosity bias are concerned. （2） We find that the radio-loud quasars deviate more from the MBH-σ＊ relation than do the radio-quiet quasars. This deviation is only partly due to a possible cosmological evolution of the MBH-σ＊ relation and the luminosity bias. （3） The radio luminosity is proportional to MBH1.28＋0.23-0.16（LBol/LEdd） ^1.29＋0.31-0.24 for radio-quiet quasars and to -MBH3.10＋0.60-0.70（LBol/LEdd）^4.18＋1.40-1.10 - for radio-loud quasars. The weaker dependence of the radio luminosity on the mass and the Eddington ratio for radio-loud quasars shows that other physical effects would account for their radio luminosities, such as the spin of the black hole.

关键词： quasars emission lines - galaxies nuclei -galaxies bulges - black hole physics

A medical robot for needle placement therapy in liver cancer

在线全文

学校读者我要写书评

暂无评论

Journal of zhejiang University-Science A(Applied Physics & Engineering) 2010年第4期11卷 263-269页

作者： Xing-guang DUAN Gui-bin bian Hong-hua zHAO Xing-tao WANG Qiang HUANG Intelligent Robotics Institute Beijing Institute of Technology Beijing 100081 China

Hepatocellular carcinoma (HCC) is the second most common malignancy in *** microwave ablation (MWA) is an effective method for liver cancer,a robotic surgical system with ultrasound-directed was designed to assist surgeons on positioning the *** robotic system includes a surgical robot with 5 degrees of freedom,a workstation for path-planning and image processing,a conventional 2D ultrasound device,and an electromagnetic (EM) tracking *** space,clinical operation requirements and optimal mechanical structure are the key factors to be considered in designing a medical robot suitable for use by *** on the mechanics of the needle placement robot,we have conducted detailed kinematic analysis,including a combined numerical algorithm and coordinate ***,the feasibility of the needle placement robot has been validated by experiment.

关键词： Surgical robot Needle insertion Inverse kinematics Numerical solution

Structures of Liquid Aluminum under High Pressure

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2001年第4期18卷 495-497页

作者： LI Hui WANG Guang-Hou bian Xiu-Fang zHANG Lin National Laboratory of Solid State Microstructures Nanjing UniverisityNanjing 210093 Mechanical Department Shandong Institue of TechnologyZibo 255012 College of Materials Science and Engineering Shandong UniversityJi’nan 250061

Molecular dynamics simulation has been carried out for melt Al under the constant-temperature and constant-pressure. The interaction between atoms is described by tight-binding many body potentials based on the second-moment approximation to the electronic density of states. The pair correlation function and the pair analysis technique are used to reveal the structural features of liquid Al under the normal and high pressure. The high pressure is favorable to the existence of bcc-cluster 1661 and 1441, but has no effect on the fcc-cluster 1421. The bond pair 1551 and 1541 with fivefold symmetry exists at high pressure. The microstructure of liquid is more similar to the structure of non-crystalline than to crystalline. The simulation results are supported by the x-ray experimental results.

关键词： crystalline cluster symmetry

Cucurbit[n]uril-calix[n]arene-based supramolecular frameworks assembled using the outer surface interactions of cucurbit[n]urils

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

Chinese Chemical Letters 2021年第1期32卷 375-379页

作者： Ming Liu Yang zhou Lixia Chen Bing bian Xin Xiao zhu Tao Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province Guizhou UniversityGuiyang 550025China College of Chemistry Chemical Engineering and Materials Science.Shandong Normal UniversityJi'nan 250014China College of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China

Based on the crystal structures of two cucurbit[6]uril/calix[n]arene-based supramolecular frameworks reported by Long and co-workers,we further investigated the interactions of cucurbit[6]uril with 4-sulfocalix[4]arene and 4-sulfocalix[6]arene using ^(1)H NMR spectroscopy and isothermal titration calorimetry(ITC),***,solid fluorescent materials were prepared via the adsorption of fluorescent dyes by these porous supramolecular frameworks,which exhibit a selective response to certain volatile organic compounds.

关键词： Cucurbit[n]urils Calix[n]arene Outer surface interaction of Q[n]s Supramolecular frameworks Functional properties

茉莉酸甲酯对苜蓿抗蓟马性及其生理指标的影响

在线全文

学校读者我要写书评

暂无评论

中国草地学报 2024年第5期46卷 82-90页

作者：爽爽霍晓伟陈崎代蕊边林郭娜武杰瑞傅清文张志强内蒙古农业大学草原与资源环境学院/草地资源教育部重点实验室/国家林业草原北方抗旱耐寒草品种育繁工程技术研究中心/农业农村部饲草栽培、加工与高效利用重点实验室/内蒙古自治区草地管理与利用重点实验室内蒙古呼和浩特010011

为探究外源茉莉酸甲酯(MeJA)对苜蓿抗蓟马性的影响,本研究以草原4号紫花苜蓿为材料,分别外源喷施0.01 mmol/L MeJA、0.10 mmol/L MeJA、1.00 mmol/L MeJA、1.00 mmol/L茉莉酸合成抑制剂(DIECA),连续喷施3 d后接种牛角花齿蓟马(Odontothr... 详细信息

为探究外源茉莉酸甲酯(MeJA)对苜蓿抗蓟马性的影响,本研究以草原4号紫花苜蓿为材料,分别外源喷施0.01 mmol/L MeJA、0.10 mmol/L MeJA、1.00 mmol/L MeJA、1.00 mmol/L茉莉酸合成抑制剂(DIECA),连续喷施3 d后接种牛角花齿蓟马(Odontothrips loti),测定蓟马接种0、7、14 d后的虫口数。在此基础上,分析不同处理下苜蓿叶片相关生理指标(氧化防御酶、次生代谢物、可溶性蛋白和可溶性糖含量)的变化,探究MeJA影响苜蓿抗蓟马性的生理机制。结果表明:与对照(喷施蒸馏水,CK)相比,低浓度的MeJA(0.01 mmol/L和0.10 mmol/L)可显著降低蓟马危害7 d和14 d后的叶片虫口数(P<0.05),1.00 mmol/L MeJA处理显著降低蓟马危害14 d后的虫口数,DIECA处理对蓟马虫口数没有显著影响。外源0.10 mmol/L MeJA处理显著增强了未接种蓟马苜蓿叶片过氧化物酶(POD)、苯丙氨酸解氨酶(PAL)、多酚氧化酶(PPO)、脂氧合酶(LOX)的活性以及单宁和类黄酮含量(P<0.05)。接种蓟马7 d后,外源MeJA处理的苜蓿叶片PPO和LOX活性显著高于CK,而SOD和PAL活性及类黄酮含量显著低于CK(P<0.05);外源DIECA处理显著增强了SOD的活性和可溶性蛋白含量(P<0.05),而POD和PPO活性以及单宁和类黄酮含量均显著低于CK(P<0.05)。接种蓟马14 d后,外源MeJA处理叶片的POD、谷胱甘肽过氧化物酶(GPX)、LOX活性和单宁含量均显著高于CK,类黄酮、可溶性糖和可溶性蛋白含量均显著低于CK(P<0.05);外源DIECA处理的谷胱甘肽还原酶(GR)和PAL活性以及类黄酮、总酚、可溶性蛋白、可溶性糖含量均显著低于CK(P<0.05)。综合以上结果表明,外源MeJA能通过调节苜蓿生理防御反应来增强其抗蓟马性。

关键词：紫花苜蓿抗虫茉莉酸蓟马生理特性

Development of a cryogen-free dilution refrigerator

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2022年第12期31卷 146-154页

作者： zhongqing Ji Jie Fan Jing Dong Yongbo bian zhi-Gang Cheng Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China

With thermal fluctuation strongly suppressed,low temperature environment is essential for studies of condensed matter physics and developments of quantum ***-low temperature below 20 m K has demonstrated its importance and significance in physical sciences and information *** refrigeration is by far the best feasible and reliable method to generate and keep lattice temperature in this *** a potential shortage of helium supply,cryogen-free dilution refrigerator(CFDR),eliminating the necessity of regular helium refill,becomes the main facility for the purpose of creating ultralow temperature *** we describe our successful construction of a CFDR which reached a base temperature of around 10.9 m K for continuous circulation and 8.6 m K for single-shot *** describe its operating mechanism and the designs of key components,especially some unique designs including heat switch and alumina thermal *** improvements in the future are also discussed.

关键词： cryogen-free dilution refrigerator heat exchanger cooling power helium