检索结果-南通市图书馆

World Journal of Clinical Cases 2024年第22期12卷 4965-4972页

作者： Gui-Quan Fan Xin-Dan Zhang Yong-Ke He xiao-gang lu Ji-Yong Zhong Zong-Yang Pang Xi-Yang Gan Pediatric Surgery The First People’s Hospital of Liangshan Yi Autonomous PrefectureXichang 615000Sichuan ProvinceChina

BACKGROUND There is still some room for optimizing ambulatory pediatric surgical procedures,and the preoperative and postoperative management quality for pediatric patients needs to be *** To discuss the safety and feasibility of the enhanced recovery after surgery(ERAS)-based management model for ambulatory pediatric surgical *** We selected 320 pediatric patients undergoing ambulatory surgery from June 2023 to January 2024 at The First People’s Hospital of Liangshan Yi Autonomous *** these,220 received ERAS-based management(research group)and 100 received routine management(control group).General information,postoperative ambulation activities,surgical outcomes(operation time,postoperative gastro-intestinal ventilation time,and hospital stay),postoperative pain visual analogue scale,postoperative complications(incision infection,abdominal distension,fever,nausea,and vomiting),and family satisfaction were *** The general information of the research group(sex,age,disease type,single parent,family history,etc.)was comparable to that of the control group(P>0.05),but the rate of postoperative(2 h,4 h,and 6 h after surgery)ambulation activities was statistically higher(PluSION The ERAS-based management model was safe and feasible in ambulatory pediatric surgical procedures and worthy of clinical promotion.

关键词： Ambulatory pediatric surgery Ambulatory surgery Enhanced recovery after surgery Safety Feasibility

Simulation of BCC dissolution in Fe-Cr-Ni system by ICME

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2023年第4期30卷 660-676页

作者： Zi-tian Zhang Jing-jing Wang Wei Liu xiao-gang lu School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Ansteel Beijing Research Institute Co. Ltd.Beijing 102211China Materials Genome Institute Shanghai UniversityShanghai 200444China

Integrated simulation on dissolution of the body-centered-cubic(bcc,α)phase in the face-centered cubic(fcc,γ)matrix in the ternary Fe–Cr–Ni system is a first step toward the study of phase transformations in steels in the framework of integrated computational materials *** accuracy of the simulation highly depends on the qualities of the thermodynamic data and atomic ***,the Fe–Cr–Ni system and its binary sub-systems were thermodynamically assessed by using the CALculation of PHAse Diagrams approach coupled with first-principles calculations,based on various types of thermodynamic data and phase diagrams from the *** the thermodynamics incorporated,the atomic mobilities and diffusivities of the fcc and bcc phases in the Fe–Cr–Ni system were then *** calculated diffusion coefficients show a satisfactory agreement with the experimental data in a wide range of composition and *** with these requisite data,the diffusion-controlled bcc dissolution was finally simulated which well agrees with the experiments for different experimental conditions.

关键词： First-principles calculation Thermodynamics Diffusion Dissolution Fe–Cr–Ni system

Main controlling factor and mechanism of gas-in-place content of the Lower Cambrian shale from different sedimentary facies in the western Hubei area, South China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum Science 2024年第3期21卷 1488-1507页

作者： gang Li Xian-Ming xiao Bo-Wei Cheng Chen-gang lu Yue Feng Dong-Sheng Li School of Energy Resources China University of Geosciences(Beijing)Beijing100083China Frontiers Science Center for Deep-time Digital Earth China University of Geosciences(Beijing)Beijing100083 China

The Lower Cambrian shale gas in the western Hubei area,South China has a great resource prospect,but the gas-in-place(GIP)content in different sedimentary facies varies widely,and the relevant mechanism has been not well *** the present study,two sets of the Lower Cambrian shale samples from the Wells YD4 and YD5 in the western Hubei area,representing the deep-water shelf facies and shallowwater platform facies,respectively,were investigated on the differences of pore types,pore structure and methane adsorption capacity between them,and the main controlling factor and mechanism of their methane adsorption capacities and GIP contents were *** results show that the organic matter(OM)pores in the YD4 shale samples are dominant,while the inorganic mineral(IM)pores in the YD5 shale samples are primary,with underdeveloped OM *** pore specific surface area(SSA)and pore volume(PV)of the YD4 shale samples are mainly from micropores and mesopores,respectively,while those of the YD5 shale samples are mainly from micropores and macropores,*** methane adsorption capacity of the YD4 shale samples is significantly higher than that of the YD5 shale samples,with a maximum absolute adsorption capacity of 3.13 cm^(3)/g and 1.31 cm^(3)/g in average,*** with the shallow-water platform shale,the deep-water shelf shale has a higher TOC content,a better kerogen type and more developed OM pores,which is the main mechanism for its higher adsorption *** GIP content models based on two samples with a similar TOC content selected respectively from the Wells YD4 and YD5 further indicate that the GIP content of the deep-water shelf shale is mainly 34 m^(3)/t within a depth range of 1000—4000 m,with shale gas exploration and development potential,while the shallow-water platform shale has normally a GIP content of<1 m^(3)/t,with little shale gas *** the geological and geochemical conditions of shale gas formation a

关键词： Lower Cambrian shale Deep-water shelf facies Shallow-waterplat form facies Pore structure Methane adsorption Gas-in-place content Controlling factor

Remarks on the recent progress of Materials Genome Initiative

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2015年第22期60卷 1966-1968页

作者： xiao-gang lu School of Materials Science and Engineering Shanghai University Materials Genome Institute Shanghai University

The Materials Genome Initiative(MGI)has attracted great attention globally since June 2011,when the US President Obama announced Advanced Manufacturing Partnership(AMP),in which MGI is a key *** June 2014,the US National Science and Technology Council published‘‘Materials Genome Initiative Strategic Plan’’,describing in detail the strategy that guides and coordinates US Federal activities and provides a clear technical path

关键词：基因组计划材料科学技术委员会美国总统先进制造组成部分 AMP

Classification of knowledge graph completeness measurement techniques

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1期35卷 154-162页

作者： ZHANG Ying xiao gang Institute of Systems Engineering Academy of Military SciencesBeijing 100107China

At present,although knowledge graphs have been widely used in various fields such as recommendation systems,question and answer systems,and intelligent search,there are always quality problems such as knowledge omissions and *** assessment and control,as an important means to ensure the quality of knowledge,can make the applications based on knowledge graphs more complete and more accurate by reasonably assessing the knowledge graphs and fixing and improving the quality problems at the same ***,as an indispensable part of the knowledge graph construction process,the results of quality assessment and control determine the usefulness of the knowledge *** them,the assessment and enhancement of completeness,as an important part of the assessment and control phase,determine whether the knowledge graph can fully reflect objective phenomena and reveal potential connections among *** this paper,we review specific techniques of completeness assessment and classify completeness assessment techniques in terms of closed world assumptions,open world assumptions,and partial completeness *** purpose of this paper is to further promote the development of knowledge graph quality control and to lay the foundation for subsequent research on the completeness assessment of knowledge graphs by reviewing and classifying completeness assessment techniques.

关键词： quality assessment completeness assessment closed world assumptions open world assumption partial completeness assumption

Research on the influences of motion characteristics of jetting projectile charge under water

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第3期33卷 411-425页

作者： Xing Chen Yong-gang lu Institute of Systems Engineering China Academy of Engineering PhysicsMianyang 621900SichuanChina

Shaped charge warhead is important for enhancing the damage performance of underwater *** paper used finite element analysis software and based on JPC water penetration experiments to examine the influence of liner parameters(wall thickness,material),charge aspect ratio,and stand-off distance on the movement characteristics of JPC in *** findings reveal that the head diameter of the JPC increases and experiences significant erosion after entering the water,the effective length of the JPC in water undergoes two distinct phases:a growth phase and a decrease phase,with the velocity of the JPC decaying *** the liner thickness,stand-off distance and the charge aspect ratio can improve the erosion resistance and the velocity retention capacity of the *** optimal ranges for liner thickness and stand-off distance are 0.0363D_(k) to 0.0545D_(k)(D_(k) is the charge diameter),the stand-off distance should be within 1.0D_(k).After the charge aspect ratio higher than 1.25,the charge structure exerts minimal influence the movement characteristics of the JPC in *** density plays a crucial role in the velocity decay pattern of the JPC during *** with higher densities exhibit superior velocity retention capabilities in water,with the velocity decay pattern converging if the densities are ***,copper,tantalum and tungsten liners are deemed appropriate for underwater shaped charge ***,the results will provide an important reference for the design of underwater shaped charge warhead.

关键词： JPC Movement characteristics Underwater penetration Numerical simulation

Thermodynamic modeling of Cr-Al-C and Ni-Al-C systems for low-density steels

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research(International) 2020年第10期27卷 1190-1199页

作者： Wei-sen Zheng Yan-lin He xiao-gang lu State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China School of Materials Science and Engineering Shanghai UniversityShanghai 200444China

The so-called low-density steels have generated a lot of interests with their high specific strength and ductility due to the addi-tion of the light element *** order to accelerate the low-density steel design,a thermodynamic database has been developedwithin the present author *** Al-containing systems,i.e.,Cr-Al-Cand Ni-Al-C,were modeled and optimirzed with CALPHAD approach based on the reliable binary *** Cr-Al-C,system,the Gibbs energy of Cr2AlC phasewas described by a temperature-dependent polynomial with the aid of the experimental data on the heat capacity,instead of estimating heat capacity from Ncumann-Kopp *** incongruent melting temperature of Cr2AlC is 1762 K with theinvariant reaction of liquid+Cr3C2+Al4C3→*** phase equilibria between Cr2AlC and binary phases were wellreproduced by using the present model *** Ni-Al-C system,the liquid,fec and bec phases have been optimizedto fit the carbon solubility in these three phases.A good agreement between the calculated and experimental data has beenobtained using the present description of Ni-Al-C *** reliable descriptions of the two ternary systems developedin the present work can be implemented into the thermodynamic database for low-density steels.

关键词： Cr-Al-C system Ni-Al-C system Thermodynamic model CALPHAD Low-density steel

On the Monge–Kantorovich Mass Transfer Problem in Higher Dimensions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2024年第8期40卷 1989-2004页

作者： xiao Jun lu School of Mathematics Southeast UniversityNanjing 210096P.R.China

This paper mainly investigates the approximation of a global maximizer of the Monge–Kantorovich mass transfer problem in higher dimensions through the approach of nonlinear partial differential equations with Dirichlet *** an approximation mechanism,the primal maximization problem can be transformed into a sequence of minimization *** applying the systematic canonical duality theory,one is able to derive a sequence of analytic solutions for the minimization *** the final analysis,the convergence of the sequence to an analytical global maximizer of the primal Monge–Kantorovich problem will be demonstrated.

关键词： Monge-Kantorovich mass transfer singular variational problem canonical duality theory

How to implement a knowledge graph completeness assessment with the guidance of user requirements

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3期35卷 679-688页

作者： ZHANG Ying xiao gang Institute of Systems Engineering Academy of Military SciencesBeijing 100107China

In the context of big data, many large-scale knowledge graphs have emerged to effectively organize the explosive growth of web data on the Internet. To select suitable knowledge graphs for use from many knowledge graphs, quality assessment is particularly important. As an important thing of quality assessment, completeness assessment generally refers to the ratio of the current data volume to the total data *** evaluating the completeness of a knowledge graph, it is often necessary to refine the completeness dimension by setting different completeness metrics to produce more complete and understandable evaluation results for the knowledge ***, lack of awareness of requirements is the most problematic quality issue. In the actual evaluation process, the existing completeness metrics need to consider the actual application. Therefore, to accurately recommend suitable knowledge graphs to many users, it is particularly important to develop relevant measurement metrics and formulate measurement schemes for completeness. In this paper, we will first clarify the concept of completeness, establish each metric of completeness, and finally design a measurement proposal for the completeness of knowledge graphs.

关键词： knowledge graph completeness assessment relative completeness user requirement quality management

Synthesis of Organofluorine Compounds with Acylsilanes

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2024年第8期42卷 887-902页

作者： Youyuan Guo gang Zhou xiao Shen The Institute for Advanced Studies Engineering Research Center of Organosilicon Compounds&MaterialsMinistry of EducationWuhan University299 Bayi RoadWuhanHubei430072 China

Comprehensive Summary,Organofluorine compounds are central in synthetic chemistry,medicinal chemistry and material *** this review,we summarize the investigations on the synthesis of organofluorine compounds with *** the non-fluorinated acylsilanes,the in situ generation of difluoroenoxysilanes from the reactions of the acylsilanes with trifluoromethylation reagents is the major pathway,leading to the facile preparation of variousα,α-*** the fluoroalkylacylsilanes,apart from the in situ generation of difluoroenoxysilanes through anion Brook rearrangement,radical Brook rearrangement of the photoexcited acylsilanes and the selective control of reactivities of the biradicals pave the way for the synthesis of a variety of organofluorine *** general,most of these reactions gave racemic products,and the asymmetric synthesis of organofluorine compounds with acylsilanes is still rare,which would be a future.

关键词： Acylsilanes Organofluorine compounds Brook rearrangement Radical rearrangement β-Fluoride elimination Asymmetric catalysis Photocatalysis Defluoroalkylation