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Clinical significance of preoperative nutritional status in elderly gastric cancer patients undergoing radical gastrectomy:A singlecenter retrospective study

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World Journal of Gastrointestinal Surgery 2024年第7期16卷 2211-2220页

作者： Xi-Ning zhao Jing Lu Hong-yong He Sheng-Jin Ge Department of Anesthesiology Zhongshan HospitalFudan UniversityShanghai 200032China Department of Nursing Zhongshan HospitalFudan UniversityShanghai 200032China Department of General Surgery/Emergency Surgery Zhongshan HospitalFudan UniversityShanghai 200032China

BACKGROUND The population of elderly patients with gastric cancer is increasing,which is a major public health issue in *** is one of the greatest risk factors for adverse clinical outcomes in elderly patients with gastric *** To investigate the preoperative nutritional status and its association with delayed discharge of elderly gastric cancer patients following radical *** A total of 783 patients aged 65 years and older harboring gastric adenocarcinoma and following radical gastrectomy were retrospectively analyzed from the prospectively collected database of Zhongshan Hospital of Fudan University between January 2018 and May *** The overall rate of malnutrition was 31.8%.The incidence of postoperative complications was significantly higher in the malnourished group compared to the well-nourished group(P<0.001).Nutritional characteristics in the malnourished group,including body mass index,prognostic nutritional index(PNI),albumin,prealbumin,and hemoglobin,were all significantly lower than those in the well-nourished *** percentage of patients who received postoperative total nutrient admixture was lower in the malnourished group compared to the wellnourished group(22.1%vs 33.5%,P=0.001).Age≥70 years(HR=1.216,95%CI:1.048-1.411),PNI<44.5(HR=1.792,95%CI:1.058-3.032),operation time≥160 minutes(HR=1.431,95%CI:1.237-1.656),and postoperative complications grade III or higher(HR=2.191,95%CI:1.604-2.991)were all recognized as independent risk factors associated with delayed *** Malnutrition is relatively common in elderly patients undergoing *** PNI is an independent risk factor associated with delay *** strategies are needed to improve the clinical outcome of these patients.

关键词： Gastric cancer Preoperative nutritional status Malnutrition Elderly Radical gastrectomy

Magnetic resonance imaging techniques for lithium-ion batteries:Principles and applications

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Magnetic Resonance Letters 2024年第2期4卷 22-39页

作者： Hongxin Lin Yanting Jin Mingming Tao Yingao Zhou Peizhao Shan Danhui zhao yong Yang State Key Laboratory for Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials and Department of ChemistryCollege of Chemistry and Chemical EngineeringTan Kah Kee Innovation Laboratory(IKKEM)Xiamen UniversityXiamen361005China School of Energy Xiamen UniversityXiamen361005China

Operando monitoring of internal and local electrochemical processes within lithium-ion batteries(LIBs)is crucial,necessitating a range of non-invasive,real-time imaging characterization techniques including nuclear magnetic resonance(NMR)*** review provides a comprehensive overview of the recent applications and advancements of non-invasive magnetic resonance imaging(MRI)techniques in *** initially introduces the principles and hardware of MRI,followed by a detailed summary and comparison of MRI techniques used for characterizing liquid/solid electrolytes,electrodes and commercial *** encompasses the determination of electrolytes'transport properties,acquisition of ion distribution profile,and diagnosis of battery *** focusing on experimental parameters and optimization strategies,our goal is to explore MRI methods suitable to a variety of research subjects,aiming to enhance imaging quality across diverse scenarios and offer critical physical/chemical insights into the ongoing operation processes of LIBs.

关键词： Lithium-ion batteries Magnetic resonance imaging(MRI) Electrolytes Electrodes Commercial batteries

A compact route for efficient production of high-purity β-Ga2O3 powder

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Rare Metals 2024年第9期43卷 4573-4584页

作者： Xiao-Wei Zhou Gao-Jie Chen Liang Xu Zhi-Jun Shao Cheng Yang yong-Pan Tian Zhuo zhao School of Metallurgical Engineering Anhui University of Technology Low-Carbon Research Institute Anhui University of Technology

The present study has proposed a compact process for the production of high-purity β-Ga2O3powder by simply using gallium metal and water as the raw materials. The process basically consists of two essential steps including hydrothermal synthesis of Ga OOH and calcination of Ga OOH for the production of the target product of β-Ga2O3. Thermodynamic evaluation and systematic experiments were conducted for process parameter optimization. X-ray diffractometer（XRD）, scanning electron microscopy（SEM）, thermogravimetryDdifferential scanning calorimetry（TG-DSC） and X-ray photoelectron spectroscopy（XPS） were utilized to clarify the reaction mechanisms of the hydrothermal synthesis and transformation of Ga OOH to β-Ga2O3by calcination. Chemical analysis of the final product of β-Ga2O3obtained under the optimal conditions was carried out with inductively coupled plasma mass spectrometry（ICP-MS）, and the results showed that the contents of the representative impurities such as Ni, Cu, In, Mn, Co, Zn and Cr are obviously lower than the requirement of 5N β-Ga2O3standard, exhibiting excellent application prospect of the proposed process to produce high-purity β-Ga2O3.

关键词： Calcination Hydrothermal synthesis Purity Reaction mechanism β-Ga2O3

中国西南地区金属矿开采对矿区土壤重金属影响的Meta分析

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环境科学 2021年第9期42卷 4414-4421页

作者：张健琳瞿明凯陈剑杨兰芳赵永存黄标湖北大学资源环境学院武汉430062 中国科学院南京土壤研究所土壤环境与污染修复重点实验室南京210008

金属矿开采是土壤重金属的最主要来源之一.以往针对单个或少数几个金属矿区的研究尚不足以有效支撑大尺度特别是跨省域尺度内矿区土壤重金属污染的治理.本研究针对我国金属矿产资源丰富的西南地区(云南省、四川省、贵州省、重庆市和西... 详细信息

金属矿开采是土壤重金属的最主要来源之一.以往针对单个或少数几个金属矿区的研究尚不足以有效支撑大尺度特别是跨省域尺度内矿区土壤重金属污染的治理.本研究针对我国金属矿产资源丰富的西南地区(云南省、四川省、贵州省、重庆市和西藏自治区),搜集了有关金属矿开采对土壤重金属影响的文献,采用Meta分析量化了不同情景模式(即不同子区域、矿种和土地利用类型)下金属矿开采对周边土壤As、Cd、Cr、Cu、Hg、Ni、Pb和Zn的影响,最后利用失安全系数与漏斗图检验了研究数据的发表性偏倚.结果表明,我国西南地区金属矿开采整体上显著增加了表层土壤中重金属含量[ES+(weight effect size)=1.53],重金属增加量由高到低顺序为:Cd(4109.80%)>Pb(741.49%)>Hg(452.90%)>Zn(420.70%)>As(278.10%)>Cu(138.69%)>Ni(16.18%),Cr无显著影响;四川和云南采矿对土壤Cd(ES_(+四川)=4.16;ES_(+云南)=3.20)和Pb(ES_(+四川)=3.47;ES_(+云南)=2.54)的影响较高,贵州采矿对土壤Hg(ES+=2.80)的影响最高;金属矿开采对耕地土壤(ES+=1.42)的影响较高;铅锌矿和锡矿开采显著增加了土壤中Cd、Pb和Zn的含量,铜矿开采显著增加了土壤Cu、Cd和Pb的含量;以上重金属中,Pb和Zn的研究结果受发表性偏倚的影响(P<0.05).本研究结果可为西南金属矿区土壤环境保护提供更多的有效信息.

关键词：西南地区金属矿区 Meta分析效应值土壤重金属

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滇黔桂地区土壤有机碳储量与影响因素研究

环境科学 2008年第8期29卷 2314-2319页

作者：张勇史学正赵永存于东升王洪杰孙维侠中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室

土壤有机碳（SOC）库在陆地生态系统中具有重要作用.由于土壤剖面数量和采用的土壤图比例尺等的限制,目前土壤有机碳库估算尚存在很大不确定性.为了提高SOC库估算的精确性,利用798个土壤剖面及1∶50万土壤图估算了滇黔桂地区（云南省、... 详细信息

土壤有机碳（SOC）库在陆地生态系统中具有重要作用.由于土壤剖面数量和采用的土壤图比例尺等的限制,目前土壤有机碳库估算尚存在很大不确定性.为了提高SOC库估算的精确性,利用798个土壤剖面及1∶50万土壤图估算了滇黔桂地区（云南省、贵州省和广西壮族自治区）的SOC储量,并采用逐步回归分析和通径分析方法分析了影响SOC密度的主要因子.结果表明,滇黔桂地区表土层（0-20 cm）和土壤剖面（0-100 cm）的SOC储量分别为4.39 Pg和10.91 Pg;SOC密度分别为56.2Mg·hm^-2和139.8 Mg·hm^-2,高于全国平均水平.环境因子（海拔、经度、纬度、气温和降雨）、成土母质和土地利用方式对表土层和土壤剖面SOC密度变异性的解释度分别为37.9%和30.7%;环境因子为影响SOC密度的主要因子.环境因子中,气温对SOC密度的影响大于降雨,其中气温和降雨的变化分别主要由海拔和纬度的变化引起的.除气温和降雨外,还有其它随海拔或经纬度而变化的因子也对SOC密度产生显著影响,这种影响要大于降雨的影响.

关键词：土壤有机碳碳储量碳密度分布图影响因子

Bioinspired Double-stranded Yarn with Alternating Hydrophobic/Hydrophilic Patterns for High-efficiency Fog Collection

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Chinese Journal of Polymer Science 2024年第7期42卷 968-975,I0008页

作者： Lan-Lan Hou Meng-Na Qiu Ya-Qiong Wang Tong-Hua Bai Zhi-Min Cui Jing-Chong Liu Ying-Qun Qi Nü Wang yong Li yong zhao Beijing Institute of Graphic Communication Beijing102600China Key Laboratory of Bioinspired Smart Interfacial Science and Technology of Ministry of Education Beijing Key Laboratory of Bioinspired Energy Materials and DevicesSchool of ChemistryBeijing Advanced Innovation Center for Biomedical EngineeringBeihang UniversityBeijing100191China Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China Beijing Key Laboratory for Bioengineering and Sensing TechnologyDaxing Research InstituteSchool of Chemistry and Biological EngineeringUniversity of Science and Technology BeijingBeijing100083China

Efforts to develop innovative water harvesting strategies offer powerful solutions to alleviate the water crisis,especially in remote and arid *** by the hydrophobic/hydrophilic pattern of desert beetles and water self-propulsion property of spider silks,a double-strand hydrophobic PVDF-HFP/hydrophilic PAN nanofibers yarn is proposed by electrospinning and twisting *** double-strand cooperation approach allows for water deposition on hydrophobic PVDF-HFP segment and transport under the asymmetric capillary driving force of hydrophilic PAN segment,thus speeded up the aggregation and growth of *** effects of the composition and the diameter ratio of the two primary yarns were studied and optimized for boosting fog collection *** double-strand anisotropic yarn not only provide an effective method for water harvesting,but also hold the potential to inspire innovative design concepts for fog collection materials in challenging environments.

关键词： Fog collection Wettability Electrospinning Nanofibers Spider silk

Effects of synthetic site water on bentonite-concrete system for a potential nuclear waste repository

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第9期16卷 3786-3797页

作者： zhao Sun yong-Gui Chen Wei-Min Ye Qiong Wang Dong-Bei Wu Zhen-Yu Yin Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education Department of Geotechnical EngineeringTongji UniversityShanghai200092China Department of Civil and Environmental Engineering The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina School of Chemical Science and Engineering Tongji UniversityShanghai200092China

In high-level nuclear waste(HLW)repositories,concrete and compacted bentonite are designed to be employed as buffer materials,which may raise a problem of interactions between concrete and *** interactions would lead to mineralogy transformation and buffer performance decay of bentonite under the near field environment conditions in a repository.A small-scale experimental setup was established to simulate the concrete-bentonite-site water interaction system from a potential nuclear waste repository in *** types of mortars were prepared to correspond to the concrete at different degradation *** results permit the determination of the following:(1)The macroproperties of Gaomiaozi(GMZ)bentonite(*** pressure,permeability,the final dry density,and water content of reacted samples);(2)The composition evolution of fluids from the synthetic site water-concrete-bentonite interaction systems;(3)The sample characterization including Fourier transform infrared spectroscopy(FTIR)and X-ray powder diffraction(XRD).Under the infiltration of the synthesis Beishan site water(BSW),the swelling pressure of bentonite decreases slowly with time after reaching its second swelling *** flux decreases with time during the infiltrations,and it tends to be stable after more than 120 *** to the cation exchange reactions in the BSW-concrete-bentonite systems,the divalent cations(Ca and Mg)were consumed,and the monovalent cations(Na and K)were *** dissolution of minerals in the bentonite such as albite causes Si increasing in the pore *** was concluded that the hydro-mechanical property degradation of bentonite takes place when it comes into contact with concrete mortar,even under low-pH groundwater *** soil dispersion,the uneven water content,and the uneven dry density in bentonite samples may partly contribute to the swelling decay of ***,the direct contact with concrete has an obvious effect on the performance

关键词： Mock-up device GMZ bentonite Site water-concrete-bentonite system Geochemistry Buffer performance

A Fault-Tolerant Mobility-Aware Caching Method in Edge Computing

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Computer Modeling in Engineering & Sciences 2024年第7期140卷 907-927页

作者： yong Ma Han zhao Kunyin Guo Yunni Xia Xu Wang Xianhua Niu Dongge Zhu Yumin Dong School of Computer Information Engineering Jiangxi Normal UniversityNanchang330000China School of Digital Industry Jiangxi Normal UniversityShangrao334000China The College of Computer Science Chongqing UniversityChongqing400044China College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing400030China School of Computer and Software Engineering Xihua UniversityChengdu610039China Electric Power Research Institute of State Grid Ningxia Electric Power Company Ltd. Yinchuan750002China College of Computer and Information Science Chongqing Normal UniversityChongqing401331China

Mobile Edge Computing(MEC)is a technology designed for the on-demand provisioning of computing and storage services,strategically positioned close to *** the MEC environment,frequently accessed content can be deployed and cached on edge servers to optimize the efficiency of content delivery,ultimately enhancing the quality of the user ***,due to the typical placement of edge devices and nodes at the network’s periphery,these components may face various potential fault tolerance challenges,including network instability,device failures,and resource *** the dynamic nature ofMEC,making high-quality content caching decisions for real-time mobile applications,especially those sensitive to latency,by effectively utilizing mobility information,continues to be a significant *** response to this challenge,this paper introduces FT-MAACC,a mobility-aware caching solution grounded in multi-agent deep reinforcement learning and equipped with fault tolerance *** approach comprehensively integrates content adaptivity algorithms to evaluate the priority of highly user-adaptive cached ***,it relies on collaborative caching strategies based onmulti-agent deep reinforcement learningmodels and establishes a fault-tolerancemodel to ensure the system’s reliability,availability,and *** results unequivocally demonstrate that FTMAACC outperforms its peer methods in cache hit rates and transmission latency.

关键词： Mobile edge networks mobility fault tolerance cooperative caching multi-agent deep reinforcement learning content prediction

Research progress on semi-continuous casting of magnesium alloys under external field

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China Foundry 2024年第5期21卷 516-524页

作者： Qi-yu Liao Qi-chi Le Da-zhi zhao Lei Bao Tong Wang yong-hui Jia Key Laboratory of Electromagnetic Processing of Materials Ministry of EducationNortheastern UniversityShenyang 110819China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China Key Laboratory of Lightweight Structural Materials Liaoning ProvinceNortheastern UniversityShenyang 110819China Key Laboratory of Light-weight Materials Nanjing Tech UniversityNanjing 210009China

High-performance magnesium alloys are moving towards a trend of being produced on a large scale and in an integrated *** foundational key to their successful production is the high-quality cast *** alloys produced through the conventional semi-continuous casting process inevitably contain casting defects,which makes it challenging to manufacture high-quality *** integration of external field assisted controlled solidification technology,which combines physical fields such as electromagnetic and ultrasonic fields with traditional semi-continuous casting processes,enables the production of high-quality magnesium alloy ingots characterized by a homogeneous microstructure and absence of *** article mainly summarizes the technical principles of those external field assisted casting *** focus is on elaborating the refinement mechanism of different types of electromagnetic fields,ultrasonic fields,and combined physical fields during the solidification of magnesium ***,the development prospects of producing highquality magnesium alloy ingots through semi-continuous casting under the external field were discussed.

关键词： semi-continuous casting electromagnetic field ultrasonic field magnesium alloys refinement mechanism