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Simulation Analysis of Deformation Control for Magnetic Soft Medical Robots

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IEEE/CAA Journal of Automatica Sinica 2024年第3期11卷 794-796页

作者： jingxi Wang Baoyu Liu Edmond Q.Wu jin Ma ping Li Key Laboratory of Biomechanics and Mechanobiology(Beihang University) Ministry of Education Beijing Advanced Innovation Center for Biomedical Engineeringthe School of Biological Science and Medical EngineeringBeihang UniversityBeijing100083China IEEE the Department of Automation Shanghai Jiao Tong UniversityShanghai 200240China the Department of Aerospace Medicine Air Force Medical UniversityXi’an 710032China

Dear Editor,This letter presents a biocompatible cross-shaped magnetic soft robot and investigates its deformation mode control strategy through COMSOL modeling and *** soft robots offer novel avenues for precise trea... 详细信息

关键词： robot simulation COMSOL

Effect of Shape and Placement of Twisted Pin Fins in a Rectangular Channel on Thermo-Hydraulic Performance

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Journal of Thermal Science 2024年第5期33卷 1773-1793页

作者： LI yong ZHANG jin ZHANG Yingchun ZHANG Jiajie MA Suxia SUNDEN Bengt XIE Gongnan College of Electrical and Power Engineering Taiyuan University of TechnologyTaiyuan 030024China Key Laboratory of Cleaner Intelligent Control on Coal&Electricity Ministry of EducationTaiyuan 030024China Shanxi Provincial Key Laboratory of High Efficiency Heat Storage and Low Carbon Heat Supply Taiyuan 030008China School of Energy and Power Engineering North University of ChinaTaiyuan 030051China Department of Energy Sciences Lund UniversityP.O.Box 118Lund SE 22100Sweden School of Marine Science and Technology Northwestern Polytechnical UniversityXi'an 710072China

To enhance the thermo-hydraulic performance of cooling channels,this investigation examines the influence of distinct cross-sectional shapes(i.e.,triangular,rectangular,and hexagonal)of twisted pin fins and their arrangements in straight and cross *** ambient air cooling test platform was established to numerically and experimentally investigate the flow and heat transfer characteristics of 360°twisted pin fins at Re=*** findings reveal that straight rows exhibit higher Nu values than cross rows for triangular and rectangular twisted pin fins,and Nu increases with *** contrast,for hexagonal twisted pin fins,only straight rows at Re=19000 exhibit superior overall thermal performance compared to cross ***,the heat transfer performance of the cooling channel with hexagonal twisted fins surpasses both triangular and rectangular configurations,especially at high Reynolds numbers(Re=22800).Although the heat transfer coefficient of the cooling channel with hexagonal twisted fins is significantly enhanced by 132.71%compared to the flat channel,it also exhibits the highest thermal resistance and relative friction among the three types of twisted fins,the maximum of which are 2.14 and ***,the hydrothermal performance factor(HTPF)of the cooling channels with different types of twisted pin fins depends on the Reynolds number and arrangement *** Re=15200,the highest HTPF achieved for the cross-row hexagonal twisted pin fins is 0.99.

关键词： twisted pin fin cross arrangement heat transfer pressure drop HTPF

Engineering g-C_(3)N_(4)based materials for advanced photocatalysis:Recent advances

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Green Energy & Environment 2024年第2期9卷 166-197页

作者： Xin-Lian Song Lei Chen Li-Jiao Gao jin-Tao Ren Zhong-yong Yuan National Institute for Advanced Materials School of Materials Science and EngineeringSmart Sensing Interdisciplinary Science CenterNankai UniversityTianjin300350China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Nankai UniversityTianjin300071China

Photocatalysis driven by abundant yet intermittent solar energy has considerable potential in renewable energy generation and environmental *** outstanding electronic structure and physicochemical properties of graphitic carbon nitride(g-C_(3)N_(4)),together with unique metal-free characteristic,make them ideal candidates for advanced photocatalysts *** review summarizes the up-to-date advances on g-C_(3)N_(4)based photocatalysts from ingenious-design strategies and diversified photocatalytic ***,the advantages,fabrication methods and limitations of each design strategy are systemically *** order to deeply comprehend the inner connection of theory–structure–performance upon g-C_(3)N_(4)based photocatalysts,structure/composition designs,corresponding photocatalytic activities and reaction mechanisms are jointly discussed,associated with introducing their photocatalytic applications toward water splitting,carbon dioxide/nitrogen reduction and pollutants degradation,***,the current challenges and future perspectives for g-C_(3)N_(4)based materials for photocatalysis are briefly *** design strategies and limitations are also instructive for constructing g-C_(3)N_(4) based materials in other energy and environment-related applications.

关键词： Graphitic carbon nitride g-C_(3)N_(4) Design strategies Photocatalysis Photocatalysts Reaction mechanism

Secure symbol level precoding for cell-free network based on band-region constraint of the eavesdropper’s receiving signal

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High Technology Letters 2024年第3期30卷 304-309页

作者： LI Zewen jin yong FU Chunling PENG Xin HU Zhentao School of Artifical Intelligence Henan UniversityZhengzhou 450000P.R.China School of Physics and Electronics Henan UniversityKaifeng 475000P.R.China

A symbol level secure precoding scheme based on band-region constraint of the eavesdropper’s receiving signal is proposed to enhance the energy efficiency of cell-free multiple-input multiple-output(MIMO)networks in the presence of an eavesdropper while guaranteeing the quality of service(QoS)of user and the security of ***,to lighten its high computational complexity,original problem is divided into several cascade sub-problems firstly,and then those sub-problems are handled by combining Lagrangian dual function and improved Hooke-Jeeves method *** ex-periment with other secure symbol-level precoding schemes demonstrate that proposed scheme can achieve the lower power consumption with almost same symbol error rate and QoS of user.

关键词： cell-free symbol-level precoding(SLP) physical layer security(PLS) multi-ple-input multiple-output(MIMO) band-region constraint

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心理护理对感觉统合失调患儿的实施效果评价

中国临床康复 2005年第12期9卷 110-111页

作者：靳永萍张璐河南大学护理学院临床护理教研室河南省开封市475001

目的:观察实施心理护理对感觉统合失调患儿的干预效果,为提高儿童感觉统合失调干预效果提供方法借鉴。方法:选择2002-07/2003-07在开封市感觉统合治疗中心就治感觉统合失调患儿52例为研究对象,男42例,女10例。随机将患儿分为观察组和对... 详细信息

目的:观察实施心理护理对感觉统合失调患儿的干预效果,为提高儿童感觉统合失调干预效果提供方法借鉴。方法:选择2002-07/2003-07在开封市感觉统合治疗中心就治感觉统合失调患儿52例为研究对象,男42例,女10例。随机将患儿分为观察组和对照组,两组各有男21例,女5例。两组均采用感觉统合训练治疗,实验组在训练的基础上,对家长和儿童给予心理护理;并采用儿童感觉统合能力发展评定量表及评定标准。结果:实验组干预后感觉统合量表中的前庭失衡、本体感不佳、触觉过分防御和学习能力发展不足标准分[(49.9±8.1),(42.7±6.8),(51.2±6.3),(40.6±6.0)分]明显高于干预前[(28.8±7.6),(27.2±6.3),(26.7±7.8),(28.7±6.2)分,t=4.447,4.689,6.336,4.156,P<0.01];对照组干预后的前庭失衡、本体感不佳、触觉过分防御标准分治疗明显高于干预前(t=2.942,2.542,3.154,P<0.05～0.01)。观察组总显效率明显高于对照组(χ2=7.28,P<0.05)。结论:正确的心理护理对儿童感觉统合失调的干预效果具有积极的促进作用。

关键词：感觉异常/护理感觉异常儿童

Analysis of lymph node metastasis and survival prognosis in early gastric cancer patients: A retrospective study

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World Journal of Gastrointestinal Surgery 2024年第6期16卷 1637-1646页

作者： Dong-Yuan Liu jin-jin Hu yong-Quan Zhou Ai-Rong Tan Department of General Surgery The 971st Hospital of Chinese People's Liberation ArmyQingdao 266071Shandong ProvinceChina Department of Chest Surgery Feicheng People's HospitalFeicheng 271600Shandong ProvinceChina Department of Gastrointestinal Surgery Zhongshan Hospital of Fudan UniversityShanghai 200032China Department of Oncology Qingdao Municipal HospitalQingdao 266000Shandong ProvinceChina

BACKGROUND Early gastric cancer(EGC)is a common malignant tumor of the digestive system,and its lymph node metastasis and survival prognosis have been *** retrospectively analyzing the clinical data of EGC patients,we can better under-stand the status of lymph node metastasis and its impact on survival and *** To evaluate the prognosis of EGC patients and the factors that affect lymph node METHODS The clinicopathological data of 1011 patients with EGC admitted to our hospital between January 2015 and December 2023 were collected in a retrospective cohort *** were 561 males and 450 *** mean age was 58±11 *** patient underwent radical *** status of lymph node metastasis in each group was determined according to the pathological examination results of surgical *** outcomes were as follows:(1)Lymph node metastasis in EGC patients;(2)Analysis of influencing factors of lymph node metastasis in EGC;and(3)Analysis of prognostic factors in patients with *** distributed measurement data are expressed as mean±SD,and a t test was used for comparisons between *** data are expressed as absolute numbers or percentages,and the chi-square test was used for comparisons between *** data were compared using a nonparametric rank sum test.A log-rank test and a logistic regression model were used for univariate analysis.A logistic stepwise regression model and a Cox stepwise regression model were used for multivariate *** Kaplan-Meier method was used to calculate the survival rate and construct survival curves.A log-rank test was used for survival *** Analysis of influencing factors of lymph node metastasis in *** results of the multifactor analysis showed that tumor length and diameter,tumor site,tumor invasion depth,vascular thrombus,and tumor differentiation degree were independent influencing factors for lymph node metastasis in patients with EGC(odds ratios=1.80,1.49,2.6

关键词： Gastric neoplasms Lymph node metastasis Prognosis Influencing factor Retrospective study

Gene cloning,protein expression,and enzymatic characterization of a double-stranded RNA degrading enzyme in Apolygus lucorum

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Insect Science 2024年第1期31卷 119-133页

作者： Jie-Yu Zhang jing Zhao Keyan Zhu-Salzman Qin-Qin Ji Yi-ping Jiang Liu-Bin Xiao De-jin Xu Guang-Chun Xu Lin-Quan Ge yong-An Tan College of Plant Protection Yangzhou UniversityYangzhouJiangsu ProvinceChina Institute of Plant Protection Jiangsu Academy of Agricultural SciencesNanjingJiangsu ProvinceChina Department of Entomology Texas A&M UniversityCollege StationTXUSA Taizhou Customs of the People's Republic of China TaizhouJiangsu ProvinceChina

RNA interference(RNAi)is a powerful tool that post-transcriptionally silences target genes in eukaryotic ***,silencing efficacy varies greatly among different insect ***,we met with little success when attempting to knock down genes in the mirid bug Apolygus lucorum via dsRNA *** disappearance of double-stranded RNA(dsRNA)could be a potential factor that restricts RNAi ***,we found that dsRNA can be degraded in midgut fluids,and a dsRNase of ***(AldsRNase)was identified and *** alignment indicated that its 6 key amino acid residues and the Mg2+-binding site were similar to those of other insects’*** signal peptide and endonuclease non-specific domain shared high sequence identity with the brown-winged green stinkbug Plautia stali *** showed high salivary gland and midgut expression and was continuously expressed through the whole life cycle,with peaks at the 4th instar ecdysis in the whole *** purified AldsRNase protein obtained by heterologously expressed can rapidly degrade *** comparing the substrate specificity of AldsRNase,3 specific substrates(dsRNA,small interfering RNA,and dsDNA)were all degraded,and the most efficient degradation is ***,immunofluorescence revealed that AldsRNase was expressed in the cytoplasm of midgut *** cloning and functional study of AldsRNase,the enzyme activity and substrate specificity of the recombinant protein,as well as the subcellular localization of nuclease,the reason for the disappearance of dsRNA was explained,which was useful in improving RNAi efficiency in *** and related species.

关键词： Apolygus lucorum cloning dsRNase enzymatic activity protein expression

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高能球磨对3%C-Cu粉末压制特性的影响

中国有色金属学报 2007年第9期17卷 1490-1494页

作者：金永平郭斌王尔德哈尔滨工业大学材料科学与工程学院哈尔滨150001

针对石墨/铜基复合材料存在烧结膨胀的特点,提出用粉末压制、真空热压烧结和热挤压相结合的致密化工艺。为给后续的烧结提供相对密度较高、质量好的冷压坯,采用刚性模常温单向压制方法研究高能球磨3%C-Cu(质量分数)粉末的压制压力与相... 详细信息

针对石墨/铜基复合材料存在烧结膨胀的特点,提出用粉末压制、真空热压烧结和热挤压相结合的致密化工艺。为给后续的烧结提供相对密度较高、质量好的冷压坯,采用刚性模常温单向压制方法研究高能球磨3%C-Cu(质量分数)粉末的压制压力与相对密度的关系,用黄培云压制理论考察球磨粉末的压制特性。用扫描电镜和场发射扫描电镜分别研究高能球磨粉末的微观组织和微区成分。结果表明,压制压力相同时,粉末压坯相对密度随高能球磨时间的延长而逐渐减小。高能球磨时间相同时,粉末压坯相对密度随压制压力的增加而增大。随着高能球磨时间的延长,粉末体越来越难压制。压制压力和保压时间分别为700 MPa和30 s时,所得粉末压坯的质量较好。

关键词： 3%C-Cu粉末高能球磨压制特性相对密度

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机械球磨3%C-Cu复合粉末的微观组织

材料科学与工艺 2008年第5期16卷 704-707页

作者：金永平郭斌王尔德哈尔滨工业大学材料科学与工程学院哈尔滨150001

为了获得具有良好微观组织的C-Cu复合粉末,以利于后续的压制、烧结和挤压等工艺,用机械球磨方法制备了3%C-Cu(质量分数)复合粉末.运用扫描电镜、背散射和X射线衍射等分析手段研究了该复合粉末的微观组织随球磨时间的演变规律.实验结果表... 详细信息

为了获得具有良好微观组织的C-Cu复合粉末,以利于后续的压制、烧结和挤压等工艺,用机械球磨方法制备了3%C-Cu(质量分数)复合粉末.运用扫描电镜、背散射和X射线衍射等分析手段研究了该复合粉末的微观组织随球磨时间的演变规律.实验结果表明,随着机械球磨时间的增加,Cu颗粒由树枝状转变为层片状、块状,最后转变为近球形.球磨2 h,复合粉末中的石墨衍射峰消失.随着球磨的进行,复合粉末中Cu的微观应变逐渐增大.经3 h的机械球磨获得了晶粒尺寸约为20 nm的Cu纳米晶,说明该方法可以有效地细化晶粒组织.

关键词：机械球磨 3%C-Cu复合粉末微观应变晶粒细化