检索结果-南通市图书馆

急性白血病患者照顾者积极感受现状及影响因素研究

在线全文

学校读者我要写书评

暂无评论

护理与康复 2024年第3期23卷 13-18页

作者：钟成丽程红方思施曾咏祺王薇浙江大学医学院附属第一医院浙江杭州310009

目的调查住院急性白血病患者照顾者的积极感受现状,并分析其影响因素。方法采用便利抽样法,选取2022年4-12月浙江大学医学院附属第一医院的161名急性白血病患者照顾者为研究对象。采用一般资料调查表、照顾者积极感受量表、社会支持评... 详细信息

目的调查住院急性白血病患者照顾者的积极感受现状,并分析其影响因素。方法采用便利抽样法,选取2022年4-12月浙江大学医学院附属第一医院的161名急性白血病患者照顾者为研究对象。采用一般资料调查表、照顾者积极感受量表、社会支持评定量表、简易应对方式量表和照顾者负担量表进行调查。结果本研究共发放问卷161份,剔除无效问卷后纳入150份有效问卷,150名急性白血病患者照顾者积极感受得分为(28.39±7.67)分,社会支持总分为(37.55±8.11)分,积极应对方式得分为(18.76±7.64)分,消极应对方式得分为(12.05±5.65)分,照顾者负担总分为(26.33±10.22)分。多因素线性回归分析结果显示,家庭人均月收入(t=2.127,P=0.035)、患者治疗时间(t=2.728,P=0.007)、照顾者社会支持(t=4.698,P<0.001)和积极应对方式(t=2.407,P=0.017)是急性白血病患者照顾者积极感受的影响因素,共解释样本总体变异的54.0%。结论急性白血病患者照顾者积极感受总体水平偏低,家庭人均月收入、患者治疗时间及照顾者社会支持、积极应对方式是急性白血病患者照顾者积极感受的影响因素。

关键词：白血病照顾者积极感受影响因素

5种不同血管通路对外周血干细胞采集结果影响的网状Meta分析

在线全文

学校读者我要写书评

暂无评论

中国实用护理杂志 2024年第8期40卷 634-640,F0003页

作者：程红方思施曾咏祺沈莎莎钟成丽浙江大学医学院附属第一医院护理部杭州310009 浙江大学医学院附属第一医院血液内科杭州310009

目的采用网状Meta分析评价不同血管通路对外周血干细胞采集效果的影响,为临床医护人员选择最佳血管通路提供参考。方法系统检索中国知网、维普全文数据库、万方数据知识服务平台、中国生物医学文献数据库、PubMed、Web of Science、EMb... 详细信息

目的采用网状Meta分析评价不同血管通路对外周血干细胞采集效果的影响,为临床医护人员选择最佳血管通路提供参考。方法系统检索中国知网、维普全文数据库、万方数据知识服务平台、中国生物医学文献数据库、PubMed、Web of Science、EMbase、Cochrane Library,检索时间均为建库至2023年4月15日。由2名评价员独立筛选文献、提取内容并进行文献质量评价。采用R4.2.2软件和Addis-1.16.6软件进进行网状Meta分析。结果共纳入研究7篇,所涉及的血管通路方法有5种,分别为动-静脉、经股静脉置入中心静脉导管(FV-CVC)、经颈内静脉置入中心静脉导管(IJV-CVC)、外周动脉、外周静脉。与外周静脉相比,不同血管通路在外周血干细胞采集过程中对CD34细胞数差异均无统计学意义(均P>0.05);在单次血容量处理时间上,外周静脉与IJV-CVC相比,差异有统计学意义(MD=14.80,95%CI 2.70~22.38,PIJV-CVC>动-静脉>外周动脉>外周静脉通路;对于单次血容量处理时间与单核细胞数来说,外周动脉最优,其次为外周静脉。结论研究结果表明,外周动脉可作为外周血干细胞采集中最佳血管通路,为建立外周血干细胞采集的血管通路开辟了新的途径,但还需大样本高质量临床研究证实。

关键词：造血干细胞血样采集血管通路设备网状Meta分析

Rice gene OsUGT75A regulates seedling emergence under deep-sowing conditions

在线全文

学校读者我要写书评

暂无评论

The Crop Journal 2024年第1期12卷 133-141页

作者： Jia Zhao Siyu Liu Xiaoqian Zhao Zhibo Huang Shan Sun Zixuan zeng yongqi He Zhoufei Wang The Laboratory of Seed Science and Technology Guangdong Key Laboratory of Plant Molecular BreedingNational Engineering Research Center of Plant Space BreedingSouth China Agricultural UniversityGuangzhou 510642GuangdongChina

Poor seedling emergence is a challenge for direct seeding of rice under deep-sowing field *** we reveal that UDP-glucosyltransferase OsUGT75A promotes rice seedling emergence under deepsowing conditions by increasing shoot *** of OsUGT75A was higher in the middle regions of the shoot and in shoots under deep-sowing *** of free abscisic acid(ABA)and jasmonates(JA)were higher in shoots of OsUGT75A mutants than in those of wild-type plants,and OsUGT75A mutants were more sensitive to ABA and JA *** shoot length was attributed to higher ABA INSENSITIVE 3(OsABI3)expression and lower JASMONATE-ZIM domain protein(OsJAZ)expression in *** extension by OsUGT75A is achieved mainly by promotion of cell *** elite haplotype of OsUGT75A associated with increased shoot length was identified among indica rice ***75A acts to increase seedling emergence under deep-sowing conditions.

关键词： Abscisic acid Deep-sowing Jasmonic acid Rice Shoot length

Comparative Study on Different Methods for Prediction of Thermal Insulation Performance of Thermal Barrier Coating Used on Turbine Blades

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2024年第1期33卷 172-189页

作者： ZHANG Zhixin zeng Wu ZHANG Xiaodong zeng Yuntao Advanced Gas Turbine Laboratory Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China Key Laboratory of Advanced Energy and Power Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China Innovation Academy for Light-duty Gas Turbine Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

As turbine inlet temperature gets higher and higher,thermal barrier coating(TBC) is more and more widely used in turbine *** turbine blades with TBC,it is of great significance to evaluate the temperature distribution of its substrate metal quickly and accurately,especially during the design *** different degrees of simplification such as whether to consider the change of the geometric size of the fluid domain by TBC and whether to consider the planar heat conduction in TBC,three different methods used in conjugate heat transfer(CHT) simulation to model the TBC of the turbine blades have been developed and widely used by ***,little research has been conducted to investigate the influence of the three methods on the temperature distribution of turbine *** fill this gap,three geometric models were *** are a solid conduction model with a substrate metal layer and a TBC layer,a transonic turbine vane with internal cooling and TBC,and a plate cylindrical film hole cooling model with *** methods were used in these geometric models and their differences were carefully analyzed and *** result shows that for the conduction model used in this paper,with the same TBC surface temperature distribution,the difference between the three methods is very small and can be *** a transonic turbine vane with internal cooling,regarding the local maximum temperature of the substrate-TBC interface,the largest difference between the method in which TBC is considered as a thermal resistance or a virtual layer of cells and the method in which three-dimensional heat conduction equation of TBC is solved occurs at the trailing *** difference near the leading edge is below *** employed to the film cooling model,the difference of the laterally averaged temperature of the substrate-TBC interface can be 8 K which is mainly due to the change of the length to diameter ratio of the film cooling hole by *** the substrate

关键词： turbine blade thermal barrier coating conjugate heat transfer film cooling hole

Nested Saturated Control of Uncertain Complex Cascade Systems Using Mixed Saturation Levels

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1163-1174页

作者： Meng Li Zhigang zeng Wuhan National Laboratory for Optoelectronics Wuhan 430074 School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan 430074China School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan 430074 Key Laboratory of Image Processing and Intelligent Control of Education Ministry of China Wuhan 430074China

This study addresses the problem of global asymptotic stability for uncertain complex cascade systems composed of multiple integrator systems and non-strict feedforward nonlinear systems. To tackle the complexity inherent in such structures, a novel nested saturated control design is proposed that incorporates both constant saturation levels and state-dependent saturation levels. Specifically, a modified differentiable saturation function is proposed to facilitate the saturation reduction analysis of the uncertain complex cascade systems under the presence of mixed saturation levels. In addition, the design of modified differentiable saturation function will help to construct a hierarchical global convergence strategy to improve the robustness of control design scheme. Through calculation of relevant inequalities, time derivative of boundary surface and simple Lyapunov function,saturation reduction analysis and convergence analysis are carried out, and then a set of explicit parameter conditions are provided to ensure global asymptotic stability in the closed-loop systems. Finally, a simplified system of the mechanical model is presented to validate the effectiveness of the proposed method.

关键词： method saturation differentiable

Aggregation-regulated bioreduction process of graphene oxide by Shewanella bacteria

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2024年第5期69卷 56-62页

作者： Kaixin Han Yibo zeng Yinghua Lu Ping zeng Liang Shen Department of Chemical and Biochemical Engineering College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen UniversityXiamen 361005China Chinese Research Academy of Environmental Sciences Beijing 100012China

The bioreduction of graphene oxide(GO)using environmentally functional bacteria such as Shewanella represents a green approach to produce reduced graphene oxide(rGO).This process differs from the chemical reduction that involves instantaneous molecular *** bioreduction,the contact of bacterial cells and GO is considered the rate-limiting *** reveal how the bacteria-GO integration regulates rGO production,the comparative experiments of GO and three Shewanella strains were carried ***-transform infrared spectroscopy,X-ray photoelectron spectroscopy,Raman spectroscopy,and atomic force microscopy were used to characterize the reduction degree and the aggregation *** results showed that a spontaneous aggregation of GO and Shewanella into the condensed entity occurred within 36 h.A positive linear correlation was established,linking three indexes of the aggregation potential,the bacterial reduction ability,and the reduction degree(ID/IG)comprehensively.

关键词： Graphene oxide Reduced graphene oxide Bioreduction Aggregation Shewanella

Eigenvalues for the Clamped Plate Problem of L_(ν)^(2) Operator on Complete Riemannian Manifolds

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2024年第9期40卷 2223-2243页

作者： Ling Zhong zeng Jiangxi Provincial Center for Applied Mathematics&School of Mathematics and Statistics Jiangxi Normal UniversityNanchang 330022P.R.China

L_(ν) operator is an important extrinsic differential operator of divergence type and has profound geometric *** this paper,we consider the clamped plate problem of L_(ν)^(2)operator on a bounded domain of the complete Riemannian manifolds.A general formula of eigenvalues of L_(ν)^(2) operator is *** this general formula,we obtain some estimates for the eigenvalues with higher order on the complete Riemannian *** several fascinating applications,we discuss this eigenvalue problem on the complete translating solitons,minimal submanifolds on the Euclidean space,submanifolds on the unit sphere and projective *** particular,we get a universal inequality with respect to the L_(II) operator on the translating ***,it is very difficult to get universal inequalities for weighted Laplacian and even Laplacian on the complete Riemannian ***,this work can be viewed as a new contribution to universal estimate.

关键词： Mean curvature flows L_(ν)^(2)operator clamped plate problem eigenvalues Riemannian manifolds translating solitons

Electrochemical conversion of organic compounds and inorganic small molecules

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第10期67卷 3223-3246页

作者： Weimei zeng Youai Qiu Department of Chemistry Nankai UniversityTianjin 300071China

Electrochemical synthesis presents a facile and sustainable strategy to produce valuable *** review summarizes the most recent advances in electrosynthesizing value-added compounds with inorganic small ***“small molecules”refers to a broad spectrum of chemicals,we mainly focus on the electrochemical conversion of CO_(2),H_(2)O/D_(2)O,NH_(3)and SO_(2)until March *** review intends to compare the results and display general trends throughout the field,with an emphasis on the substrate scope and mechanical ***,we propose several techniques and protocols that can enable a more fundamental understanding of the electrochemical reaction involving inorganic small molecules and help drive this methodology toward commercialization.

关键词： electrochemical synthesis inorganic small molecule organic synthesis carbon dioxide water

Analysis of gravity wave activity during stratospheric sudden warmings in the northern hemisphere

在线全文

学校读者我要写书评

暂无评论

Earth and Planetary Physics 2024年第2期8卷 415-422页

作者： XuanYun zeng Guang Zhong School of Physics and Electronic Sciences Changsha University of Science and TechnologyChangsha 410000China Key Laboratory of Geospace Environment Chinese Academy of SciencesUniversity of Science&Technology of ChinaHefei 230026China

Due to the significant changes they bring to high latitude stratospheric temperature and wind,stratospheric sudden warmings(SSWs)can have an impact on the propagation and energy distribution of gravity waves(GWs).The variation characteristics of GWs during SSWs have always been an important *** temperature data from January to March in 2014−2016,provided by the Constellation Observing System for Meteorology,Ionosphere and Climate(COSMIC)mission,we have analyzed global GW activity at 15−40 km in the Northern Hemisphere during SSW *** the SSWs that we studied,the stratospheric temperature rose in one or two longitudinal regions in the Northern Hemisphere;the areas affected extended to the east of 90°*** these SSWs,the potential energy density(E_(p)of GWs expanded and covered a larger range of longitude and altitude,exhibiting an eastward and downward *** E_(p)usually increased,while partially filtered by the eastward zonal *** zonal winds weakened or turned westward,E_(p)began to *** SSWs,the E_(p)usually *** observations can serve as a reference for analyzing the interaction mechanism between SSWs and GWs in future work.

关键词： stratospheric sudden warming gravity wave wind filter