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Correlation between abdominal computed tomography signs and postoperative prognosis for patients with colorectal cancer

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World Journal of Gastrointestinal Surgery 2024年第7期16卷 2145-2156页

作者： shao-min yang Jie-Mei Liu Rui-Ping Wen Yu-Dong Qian Jing-Bo He Jing-Song Sun Department of Radiology Xingtan Hospital Affiliated to Shunde Hospital of Southern Medical UniversityFoshan 528315Guangdong ProvinceChina Department of Rehabilitation Medicine Shunde HospitalSouthern Medical UniversityFoshan 528399Guangdong ProvinceChina Department of Radiology Lecong Hospital of ShundeFoshan 528315Guangdong ProvinceChina Department of Ultrasound Lecong Hospital of ShundeFoshan 528315Guangdong ProvinceChina

BACKGROUND Patients with different stages of colorectal cancer(CRC)exhibit different abdominal computed tomography(CT)***,the influence of CT signs on CRC prognosis must be *** To observe abdominal CT signs in patients with CRC and analyze the correlation between the CT signs and postoperative *** The clinical history and CT imaging results of 88 patients with CRC who underwent radical surgery at Xingtan Hospital Affiliated to Shunde Hospital of Southern Medical University were retrospectively *** and multivariate Cox regression analyses were used to explore the independent risk factors for postoperative death in patients with *** three-year survival rate was analyzed using the Kaplan-Meier curve,and the correlation between postoperative survival time and abdominal CT signs in patients with CRC was analyzed using Spearman correlation *** For patients with CRC,the three-year survival rate was 73.86%.The death group exhibited more severe characteristics than the survival group.A multivariate Cox regression model analysis showed that body mass index(BMI),degree of periintestinal infiltration,tumor size,and lymph node CT value were independent factors influencing postoperative death(P<0.05 for all).Patients with characteristics typical to the death group had a low three-year survival rate(log-rankχ2=66.487,11.346,12.500,and 27.672,respectively,P<0.05 for all).The survival time of CRC patients was negatively correlated with BMI,degree of periintestinal infiltration,tumor size,lymph node CT value,mean tumor long-axis diameter,and mean tumor short-axis diameter(r=-0.559,0.679,-0.430,-0.585,-0.425,and-0.385,respectively,P<0.05 for all).BMI was positively correlated with the degree of periintestinal invasion,lymph node CT value,and mean tumor short-axis diameter(r=0.303,0.431,and 0.437,respectively,P<0.05 for all).CONCLUSION The degree of periintestinal infiltration,tumor size,and lymph node CT value are c

关键词： Colorectal cancer Abdominal Computed tomography signs Radical surgery Prognosis Correlation

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Tackling the proton limit under industrial electrochemical CO_(2)reduction by a local proton shuttle

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Carbon Energy 2024年第4期6卷 233-243页

作者： Tianye shao Kang yang Sheng Chen min Zheng Ying Zhang Qiang Li Jingjing Duan MIIT Key Laboratory of Thermal Control of Electronic Equipment School of Energy and Power EngineeringSchool of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjingChina School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaideSouth AustraliaAustralia

Industrial CO_(2)electroreduction has received tremendous attentions for resolution of the current energy and environmental crisis,but its performance is greatly limited by mass transport at high current *** this work,an ion‐polymer‐modified gas‐diffusion electrode is used to tackle this proton *** is found that gas diffusion electrode‐Nafion shows an impressive performance of 75.2%Faradaic efficiency in multicarbon products at an industrial current density of 1.16 A/cm^(2).Significantly,in‐depth electrochemical characterizations combined with in situ Raman have been used to determine the full workflow of protons,and it is found that HCO_(3)^(−)acts as a proton pool near the reaction environment,and HCO_(3)^(−)and H_(3)O^(+)are local proton donors that interact with the proton shuttle−SO_(3)^(−)from *** rich proton hopping sites that decrease the activation energy,a“Grotthuss”mechanism for proton transport in the above system has been identified rather than the“Vehicle”mechanism with a higher energy ***,this work could be very useful in terms of the achievement of industrial CO_(2)reduction fundamentally and practically.

关键词： industrial CO_(2)electroreduction proton donor proton pool proton shuttle proton transport mechanism

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Ligand-controlled NiH-catalyzed regiodivergent hydroalkylation of 2-alkenylazaarenes

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Science China Chemistry 2024年第6期67卷 1935-1940页

作者： Ya-Ping shao Zhuo-min Chi Yong-min Liang State Key Laboratory of Applied Organic Chemistry School of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou730000China

A nickel-hydride(Ni H)-catalyzed migratory and nonmigratory hydroalkylation reaction of 2-alkenyl azaarenes with alkyl iodines has been established through strategic modulation of N-or P-donor *** method enables the synthesis of diverseβ-orγ-branched aromatic *** mild regiodivergent protocols exhibit wide substrate scope,excellent functional tolerance,and great reaction yield with remarkable ***,deuterium labeling studies reveal Ni H-catalyzed interrupted chain-walking mode as the mechanism behind remotedβ-selective hydroalkylation reaction—an interesting phenomenon mediated through aromatic imine directing groups.

关键词： NiH regiodivergent hydroalkylation azaarenes interrupted chain-walking

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Neural network modeling and prediction of HfO2 thin film properties tuned by thermal annealing

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High Power Laser Science and Engineering 2024年第2期12卷 79-86页

作者： min Gao Chaoyi Yin Jianda shao Meiping Zhu School of Microelectronics Shanghai UniversityShanghaiChina Laboratory of Thin Film Optics Key Laboratory of Materials for High Power LaserShanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina Hangzhou Institute for Advanced Study University of Chinese Academy of SciencesHangzhouChina

Plasma-enhanced atomic layer deposition (PEALD) is gaining interest in thin films for laser applications, and post-annealing treatments are often used to improve thin film properties. However, research to improve thin film properties is often based on an expensive and time-consuming trial-and-error process. In this study, PEALD-HfO2 thin film samples were deposited and treated under different annealing atmospheres and temperatures. The samples were characterized in terms of their refractive indices, layer thicknesses and O/Hf ratios. The collected data were split into training and validation sets and fed to multiple back-propagation neural networks with different hidden layers to determine the best way to construct the process–performance relationship. The results showed that the three-hidden-layer back-propagation neural network (THL-BPNN) achieved stable and accurate fitting. For the refractive index, layer thickness and O/Hf ratio, the THL-BPNN model achieved accuracy values of 0.99, 0.94 and 0.94, respectively, on the training set and 0.99, 0.91 and 0.90, respectively, on the validation set. The THL-BPNN model was further used to predict the laser-induced damage threshold of PEALD-HfO2 thin films and the properties of the PEALD-SiO2 thin films, both showing high accuracy. This study not only provides quantitative guidance for the improvement of thin film properties but also proposes a general model that can be applied to predict the properties of different types of laser thin films, saving experimental costs for process optimization.

关键词： laser-induced damage threshold laser thin film neural network plasma-enhanced atomic layer deposition

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Influences of Co-Flow and Counter-Flow Modes of Reactant Flow Arrangement on a PEMFC at Start-Up

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Computer Modeling in Engineering & Sciences 2024年第5期139卷 1337-1356页

作者： Qianqian shao min Wang Nuo Xu School of Petroleum Engineering Guangdong University of Petrochemical TechnologyMaoming525000China Mechanics Division Beijing Computational Science Research CenterBeijing100193China

To investigate the influences of co-flowand counter-flowmodes of reactant flowarrangement on a proton exchange membrane fuel cell(PEMFC)during start-up,unsteady physical and mathematical models fully coupling the flow,heat,and electrochemical reactions in a PEMFC are *** continuity equation and momentum equation are solved by handling pressure-velocity coupling using the SIMPLE *** electrochemical reaction rates in the catalyst layers(CLs)of the cathode and anode are calculated using the Butler-Volmer *** multiphase mixture model describes the multiphase transport process of gas mixtures and liquid water in the fuel *** validation,the influences of co-flow and counter-flow modes on the PEMFC performance are investigated,including the evolution of the current density,flow field,temperature field,and reactant concentration field during start-up,as well as the steady distribution of the current density,reactant concentration,andmembrane water content when the start-up ***-flow and counter-flow modes influence the current density distribution and temperature *** the one hand,the co-flow mode accelerates the start-up process of the PEMFC and leads to a more evenly distributed current density than the counter-flow *** the other hand,the temperature difference between the inlet and outlet sections of the cell is up to 10.1℃ under the co-flow mode,much larger than the 5.0℃ observed in the counter-flow ***,the counter-flowmode results in a more evenly distributed temperature and a lower maximum temperature than the co-flow ***,in the flow field design of a PEMFC,the reactant flow arrangements can be considered to weigh between better heat management and higher current density distribution of the cell.

关键词： PEMFC full coupling model Butler-Volmer equation multiphase mixture model co-flow mode counter-flow mode

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The centrosymmetric to non-centrosymmetric transformation induced by alkaline-earth cations producing infrared nonlinear optical AeMn_(6)Ga_(6)S_(16)(Ae=Ca,Sr)

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Science China Chemistry 2024年第9期67卷 2941-2948页

作者： yang-Ping Zhang shao-min Pei Wen-Fa Chen Bin-Wen Liu Xiao-ming Jiang Guo-Cong Guo State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China

Non-centrosymmetric(NCS)structure is an indispensable prerequisite for second-order nonlinear optical(NLO)***,the mainstream approach for designing new NCS structures still relies on chemical substitution,necessitating an urgent infusion of fresh *** this work,two isomorphic sulfides AeMn_(6)Ga_(6)S_(16)(Ae=Ca,1;Sr,2)are afforded by modifying the skeleton of centrosymmetric(CS)Mn_(2)Ga_(2)S_(5) via introducing strong electropositive alkaline-earth ***,the incorporation of Ca^(2+)/Sr^(2+)cations allows the elementary[MnGaS_(9)]_(∞)chains to reconfigure into bumpy[MnS_(6)]-[GaS_(4)]layers in a new engagement manner,thus enabling the conversion from CS to NCS *** modifications cause not only strong second-harmonic generation(SHG)responses(~1.5×benchmark AgGaS_(2)@1,700 nm),but also significantly feasible bandgaps(2.60-2.64 e V)compared to the sulfide Mn_(2)Ga_(2)S_(5)(1.36 e V),which ultimately facilitate ultrahigh laser-induced damage thresholds(4.4-6.6×AgGaS_(2)@1,064 nm for compounds 1 and 2).The present study offers an ingenious approach for the transformation of CS to NCS structure.

关键词： second-harmonic generation non-centrosymmetrical structure NLO functional motif solid-state method

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Strain Gradient Finite Element Formulation of Flexoelectricity in Ferroelectric Material Based on Phase-Field Method

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Acta Mechanica Solida Sinica 2024年第4期37卷 570-579页

作者： Shuai Wang Hengchang Su min Yi Li-Hua shao National Key Laboratory of Strength and Structural Integrity Institute of Solid MechanicsSchool of Aeronautic Science and EngineeringBeihang UniversityBeijing100191People’s Republic of China State Key Laboratory of Mechanics and Control for Aerospace Structures and Institute for Frontier Science and Key Laboratory for Intelligent Nano Materials and Devices of ministry of Education and College of Aerospace Engineering Nanjing University of Aeronautics and AstronauticsNanjing210016People’s Republic of China

Flexoelectricity is a two-way coupling effect between the strain gradient and electric field that exists in all dielectrics,regardless of point group ***,the high-order derivatives of displacements involved in the strain gradient pose challenges in solving electromechanical coupling problems incorporating the flexoelectric *** this study,we formulate a phase-field model for ferroelectric materials considering the flexoelectric effect.A four-node quadrilateral element with 20 degrees of freedom is constructed without introducing high-order shape *** microstructure evolution of domains is described by an independent order parameter,namely the spontaneous polarization governed by the time-dependent Ginzburg–Landau *** model is developed based on a thermodynamic framework,in which a set of microforces is introduced to construct the constitutive relation and evolution *** the flexoelectric part of electric enthalpy,the strain gradient is determined by interpolating the mechanical strain at the node via the values of Gaussian integration points in the isoparametric *** model is shown to be capable of reproducing the classic analytical solution of dielectric materials incorporating the flexoelectric *** model is verified by duplicating some typical phenomena in flexoelectricity in cylindrical tubes and truncated pyramids.A comparison is made between the polarization distribution in dielectrics and *** model can reproduce the solution to the boundary value problem of the cylindrical flexoelectric tube,and demonstrate domain twisting at domain walls in ferroelectrics considering the flexoelectric effect.

关键词： Flexoelectricity Phase-field method Ferroelectrics Domain configuration

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Major Clinical Features and Epidemic Characteristics of Erosive Vulvar Lichen Planus:A Retrospective Analysis

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International Journal of Dermatology and Venereology 2024年第2期7卷 94-98页

作者： Ya-Kun shao Kai-Lyu Sun min yang Wan Liu Yu Fu Jian-min Chang Department of Dermatology Beijing HospitalNational Center of GerontologyInstitute of Geriatric MedicineChinese Academy of Medical SciencesBeijing 100730China

Objective:Vulvar lichen planus(VLP),especially erosive VLP(EVLP),seriously affects women’s physiological function and quality of life.A retrospective analysis of erosive vulvar lichen planus(EVLP)was performed to raise awareness on this chronic,deforming,and painful vulvar ***:This observational retrospective study involved 40 patients with EVLP among 1,368 patients with vulvar disease from 2017 to *** patients’vulvar clinical features and extravulvar mucosal involvement were *** patients’pain and quality of life were evaluated with the numeric rating scale and the Dermatology Life Quality Index(DLQI),*** characteristics were reported using frequencies and proportions for categorical *** variables are expressed as mean±standard *** association between NRS score for pain and DLQI score was analyzed by Pearson’s correlation ***:EVLP accounted for 2.9%(40/1,368)of all cases of vulvar disease,and the median age at onset was 42 *** mostly occurred on the labia minora and ***(20/40)of the patients had extravulvar mucosal ***(42.5%)patients had oral lichen planus,and seven(17.5%)patients were diagnosed with vulvovaginal-gingival *** numeric rating scale score showed that 47.5%(19/40)of patients experienced mild pain,whereas 12.5%(5/40)described the pain as ***-one patients(77.5%,31/40)had dyspareunia,and nine patients had aggravated pain after sexual *** mean DLQI score was 9.1±6.0,with 37.5%(15/40)of patients indicating that EVLP had severely affected their *** numeric rating scale score for pain was significantly correlated with the DLQI score(P=0.007).Conclusion:EVLP can affect the quality of women’s lives and cause severe deformations and painful architectural *** description of the characteristics of EVLP in this report will benefit the diagnosis and early treatment of this disease.

关键词： erosive vulvar lichen planus multiple mucosal involvement pain assessment quality of life Dermatology Life Quality Index numeric rating scale

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Recurrence Factors in Giant Cell Tumors of the Spine

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Chinese Medical Journal 2017年第13期130卷 1557-1563页

作者： Han-Qiang Ouyang Liang Jiang Xiao-Guang Liu Feng Wei shao-min yang Na Meng Ping Jiang Miao Yu Feng-Liang Wu Lei Dang Hua Zhou Hua Zhang Zhong-Jun Liu Department of Orthopaedics Peking University Third Hospital Beijing 100191 China Department of Pathology Peking University Health Science Center Beijing 100191 China Department of Radiotherapy Peking University Third Hospital Beijing 100191 China Research Center of Clinical Epidemiology Peking University Third Hospital Beijing 100191 China

Background： Giant cell tumors （GCTs） are benign, locally aggressive tumors. We exalnined the rate of local rectirrence of spinal GCTs and sought to identify recurrence factors in patients who underwent surgery. Methods： Between 1995 and 2014, 94 mobile spine GCT patients were treated at our hospital, comprising 43 male and 51 female patients with an average age of 33.4 years. Piecemeal intralesional spondylectomy and total en bloc spondylectomy （TES） were performed. Radiotherapy was suggested for recurrent or residual GCT cases. Since denosumab was not available before 2014 in our country, only interferon and/or zoledronic acid was suggested. Results： Of the 94 patients, four underwent conservative treatment and 90 underwent operations. Seventy-five patients （79.8%） were followed tip for a minimum of 24 months or until death. The median follow-up duration was 75.3 months. The overall recurrence rate was 37.3%. Ten patients （13.3%） died before the last follow-up （rnedian： 18.5 months）. Two patients （2.6%） developed osteogenic sarcoma. The local recurrence rate was 80.0% （24/30） in patients who underwent intralesional curettage, 8.8% （3/34） in patients who underwent extracapsular piecemeal spondylectomy,and 0 （0/9） in patients who underwent TES. The risk factors for local recurrence were lesions located in the cervical spine （P = 0.049）, intralesional curettage （P 〈 0.001 ）, repeated surgeries （P 0.014）, and malignancy （P 〈 0.001 ）. Malignant transformation was a significant risk factor for death （P 〈 0.001 ）. Conclusions： Cervical spinal tumors, curettage, and nonintact tumors were risk l;actors for local recurrence. Intralesional curettage and malignancy were the most important significant factors for local rectirrence and death, respectively.

关键词： Extracapsular Spondytectomy Giant Cell Tumors Intralesional Curettage Spine Recurrence Total En blocSpondylectomy

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Atomically Dispersed Zinc Active Sites Efficiently Promote the Electrochemical Conversion of N2 to NH3

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Energy & Environmental Materials 2024年第03期7卷 179-185页

作者： Yanjiao Wei Xinyu Wang Mengjie Sun min Ma Jian Tian minhua shao School of Materials Science and Engineering Shandong University of Science and Technology Department of Chemical and Biological Engineering The Hong Kong University of Science and Technology Energy Institute and Chinese National Engineering Research Center for Control & Treatment of Heavy Metal PollutionThe Hong Kong University of Science and Technology

At present,the research on highly active and stable nitrogen reduction reaction catalysts is still challenging work for the electrosynthesis of ammonia （NH3）.Herein,we synthesized atomically dispersed zinc active sites supported on N-doped carbon nanosheets （Zn/NC NSs） as an efficient nitrogen reduction reaction catalyst,which achieves a high ammonia yield of46.62μ***-0.85 V （vs RHE） and Faradaic efficiency of 95.8%at-0.70 V （vs RHE）.In addition,Zn/NC NSs present great stability and selectivity,and there is no significant change in NH3rate and Faradaic efficiencies after multiple *** structural characterization shows that the active center in the nitrogen reduction reaction process is the Zn-N4sites in the *** calculation confirms that Zn/NC with Zn-N4configuration has a lower energy barrier for the formation of*NNH intermediate compared with pure N-doped carbon nanosheets （N-C NSs）,thus promoting the hydrogenation kinetics in the whole nitrogen reduction reaction process.

关键词： electrocatalysis nitrogen reduction single-atom catalyst Zn–N4

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