检索结果-南通市图书馆

Controlling Tendons to Modulate Stiffness of a Planar-to-Spatial Tendon-Driven Continuum Manipulator Under External Uncertain Forces

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2024年第2期21卷 821-841页

作者： Vipin Pachouri Pushparaj Mani pathak Indian Institute of Technology Roorkee Roorkee247667India

Continuum manipulators(CM)are soft and flexible manipulators with large numbers of degrees of freedom and can perform complex tasks in an unstructured ***,their deformability and compliance can deviate distal tip under uncertain external *** address this challenge,a novel tension-based control scheme has been proposed to modulate the stiffness of a tendon-driven CM,reducing the tip position errors caused by uncertain external *** minimize the tip position error,a virtual spring is positioned between the deviated and the desired tip *** proposed algorithm corrects the manipulator deviated tip position,improving tension distribution and stiffness profile,resulting in higher stiffness and better *** corresponding task space stiffness and condition numbers are also computed under different cases,indicating the effectiveness of the tension control scheme in modulating the manipulator's *** validation conducted on an in-house developed prototype confirms the practical feasibility of the proposed approach.

关键词： Continuum arm Hyper-redundant robots Variable stiffness manipulator Tension-based control Mechatronic systems

Effective data transmission through energy-efficient clustering and Fuzzy-Based IDS routing approach in WSNs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

虚拟现实与智能硬件（中英文） 2024年第1期6卷 1-16页

作者： Saziya TABBASSUM Rajesh kumar pathak Research Scholar Department of Computer ScienceOPJS University ChuruSadulpurRajasthan 331303India Vice Chancellor OPJS University ChuruSadulpurRajasthan 331303India

Wireless sensor networks(WSN)gather information and sense information samples in a certain region and communicate these readings to a base station(BS).Energy efficiency is considered a major design issue in the WSNs,and can be addressed using clustering and routing *** is sent from the source to the BS via routing ***,these routing protocols must ensure that packets are delivered securely,guaranteeing that neither adversaries nor unauthentic individuals have access to the sent *** data transfer is intended to protect the data from illegal access,damage,or ***,in the proposed model,secure data transmission is developed in an energy-effective manner.A low-energy adaptive clustering hierarchy(LEACH)is developed to efficiently transfer the *** the intrusion detection systems(IDS),Fuzzy logic and artificial neural networks(ANNs)are ***,the nodes were randomly placed in the network and initialized to gather *** ensure fair energy dissipation between the nodes,LEACH randomly chooses cluster heads(CHs)and allocates this role to the various nodes based on a round-robin management *** intrusion-detection procedure was then utilized to determine whether intruders were present in the *** the WSN,a Fuzzy interference rule was utilized to distinguish the malicious nodes from legal ***,an ANN was employed to distinguish the harmful nodes from suspicious *** effectiveness of the proposed approach was validated using metrics that attained 97%accuracy,97%specificity,and 97%sensitivity of 95%.Thus,it was proved that the LEACH and Fuzzy-based IDS approaches are the best choices for securing data transmission in an energy-efficient manner.

关键词： Low energy adaptive clustering hierarchy(LEACH) Intrusion detection system(IDS) Wireless sensor network(WSN) Fuzzy logic and artificial neural network(ANN)

GRP7 phase separation as an interpreter of temperature cues

在线全文

学校读者我要写书评

暂无评论

Molecular Plant 2024年第6期17卷 842-844页

作者： Sunita pathak Lucia C.Strader Department of Biology Duke UniversityDurhamNCUSA

Plants are exposed to a range of daily and seasonal temperatures and thus are required to regulate their cellular processes under fluctuating temperature *** various temperature-responsive genes,GLYCINE-RICH RNA BINDING PROTEIN7(GRP7)encodes a glycine-rich RNA-binding protein that provides freezing tolerance to plants(Carpenter et al.,1994;kim et al.,2008)by acting as an RNA chaperone(kwak et al.,2011).

关键词： conditions. separation

Barriers and drivers for sustainable public transportation in Indian context

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green Energy and Intelligent Transportation 2024年第1期3卷 32-45页

作者： Gopi R Dev Vrat pathak Saurabh Pratap Lakshay Department of Mechanical Engineering Indian Institute of TechnologyVaranasiIndia

Rising negative externalities,including greenhouse gas emissions,climate change,and environmental pollution,shows the need for sustainable and environmentally friendly modes of *** zero-emission,environmentally friendly electric buses in public transportation systems can be an effective solution for both developing and developed countries,including *** the Indian government is making numerous efforts to promote electric buses in commercial and public transportation systems,it faces several formidable *** research objective is to analyze and evaluate the primary factors influencing the adoption and usage of electric buses in the Indian public transportation system,within the limited available resources.A survey questionnaire is prepared with several perceptual subjects for the key perceived *** empirical analysis using Structural Equation Modeling(SEM)is then performed to identify the critical *** result of this study demonstrates that the infrastructural barriers substantially impact the adoption and utilization of electric ***,the study provides critical insights and managerial implications for decision-makers.

关键词： Electric bus adoption Public transportation system Barriers Structural equation modelling Exploratory factor analysis Confirmatory factor analysis

Impact of pre- and peri-operative risk factors on length of stay and hospital readmission following minimally-invasive partial nephrectomy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Journal of Urology 2024年第1期11卷 72-79页

作者： Vanessa A.Lukas Rahul Dutta Ashok k.Hemal Matvey Tsivian Timothy E.Craven Nicholas A.Deebel David D.Thiel Ram Anil pathak Brigham and Women's Hospital Division of UrologyDepartment of Surgery75 Francis StreetBostonMAUSA Atrium Health Wake Forest Baptist Medical Center Department of Urology1 Medical Center BlvdWinston-SalemNCUSA Mayo Clinic Florida Department of Urology4500 San Pablo RoadJacksonvilleFLUSA

Objective:We conducted an analysis of the American College of Surgeons National Surgical Quality Improvement Program database for minimally-invasive partial nephrectomy cases reported with the goal to identify pre-and peri-operative variables associated with length of stay(LOS)greater than 3 days and readmission within 30 ***:Records from 2008 to 2018 for“laparoscopy,surgical;partial nephrectomy”for prolonged LOS and readmission cohorts were *** analysis with Chi-square,t-tests,and multivariable logistic regression analysis with odds ratios(ORs),p-values,and 95%confidence intervals assessed statistical ***:Totally,20306 records for LOS greater than 3 days and 15854 for readmission within 30 days were *** and multivariable analysis exhibited similar *** LOS greater than 3 days,undergoing non-elective surgery(OR=5.247),transfusion of greater than four units within 72 h prior to surgery(OR=5.072),pre-operative renal failure or dialysis(OR=2.941),and poor pre-operative functional status(OR=2.540)exhibited the strongest statistically significant *** hospital readmission within 30 days,loss in body weight greater than 10%in 6 months prior to surgery(OR=2.227)and bleeding disorders(OR=2.081)exhibited strongest statistically significant ***:Multiple pre-and peri-operative risk factors are independently associated with prolonged LOS and hospital readmission within 30 days of surgery using the American College of Surgeons National Surgical Quality Improvement Program *** the risks factors that can potentially be improved prior to minimally-invasive partial nephrectomy is crucial to informing patient selection,optimization strategies,and patient education.

关键词： Minimally-invasive partial nephrectomy The American College of Surgeons National Surgical Quality Improvement Program Lengthof stay Hospital readmission

Common Ground for India and 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

中印对话（英文版） 2024年第1期38卷 18-21页

作者： Sriparna pathak China Studiesat O.P.Jindal Global University India

To expand economic cooperation between India and China,the existing joint working groups and dialogue mechanisms need to be leveraged to propel more fruitful engagements in 2024 and beyond.

关键词： India fruitful beyond

Fatigue crack growth simulations of 3-D linear elastic cracks under thermal load by XFEM

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2015年第4期9卷 359-382页

作者： Himanshu pathak akhilendra SINGH I.V. SINGH S. k. YADAV Department of Mechanical Engineering Shiv Nadar University Gautam Buddha Nagar 201314 India Department of Mechanical Engineering liT Patna Patna 800013 India Department of Mechanical and Industrial Engineering HT Roorkee Roorkee 247667 India

This paper deals with the fatigue crack growth simulations of three-dimensional linear elastic cracks by XFEM under cyclic thermal load. Both temperature and displacement approximations are extrinsically enriched by Heaviside and crack front enrichment functions. Crack growth is modelled by successive linear extensions, and the end points of these linear extensions are joined by cubic spline segments to obtain a modified crack front. Different crack geometries such as planer, non-planer and arbitrary spline shape cracks are simulated under thermal shock, adiabatic and isothermal loads to reveal the sturdiness and versatility of the XFEM approach.

关键词： 3-D cracks fatigue life Paris law thermal load XFEM

Aqueous-phase reforming of hydroxyacetone solution to bio-based H_(2)over supported Pt catalysts

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2024年第4期9卷 777-788页

作者： A.k.k.Vikla k.koichumanova Songbo He k.Seshan Joint International Research Laboratory of Circular Carbon Nanjing Tech UniversityNanjing211816China Faculty of Science and Technology University of Twente7500 AE EnschedeThe Netherlands CoRe Pro 9723 BL GroningenThe Netherlands

Aqueous-phase reforming(APR)is an attractive process to produce bio-based hydrogen from waste biomass streams,during which the catalyst stability is often challenged due to the harsh reaction *** this work,three Pt-based catalysts supported on C,AlO(OH),and ZrO_(2)were investigated for the APR of hydroxyacetone solution in afixed bed reactor at 225℃and 35 *** them,the Pt/C catalyst showed the highest turnover frequency for H_(2)production(TOF of 8.9 molH_(2)molPt^(-1)min^(-1))and the longest catalyst *** the AlO(OH)and ZrO_(2)supported Pt catalysts,the side reactions consuming H_(2),formation of coke,and Pt sintering result in a low H_(2)production and the fast catalyst *** proposed reaction pathways suggest that a promising APR catalyst should reform all oxygenates in the aqueous phase,minimize the hydrogenation of the oxygenates,maximize the WGS reaction,and inhibit the condensation and coking reactions for maximizing the hydrogen yield and a stable catalytic performance.

关键词： APR Hydroxyacetone TOF Bio-based H_(2) Support effect

Al-driven analysis establishes the single base substitution signatures as personalized prognostic predictors for five-year survival of gastric cancer

在线全文

学校读者我要写书评

暂无评论

Genes & Diseases 2024年第4期11卷 73-76页

作者： Zhenzhang Li Lingqing Xu Wen Luo Shaoan Zhangg Chunyu Hou Xiaohong Xu ,Xubei Peng E.Shiju Janak L.pathak Shizhen Zhang Jiawei Liu Linhai Li Yang Li School of Biomedical Engineering The Sixth Affiliated HospitalGuangzhou Medical UniversityGuangzhouGuangdong 511436China College of Mathematics and Systems Science Guangdong Polytechnic Normal UniversityGuangzhouGuangdong 510665China The Second Affiliated Hospital Guangzhou Medical UniversityGuangzhouGuangdong 510260China Center for Learning Sciences and Technologies The Chinese University of Hong KongShatinNew Territories 999077China Affiliated Stomatology Hospital of Guangzhou Medical University Guangzhou Medical UniversityGuangzhouGuangdong 510182China International School of Photonics Cochin University of Science and TechnologyKochiKerala 682022India

Al-driven genetic engineering,as a burgeoning diagnostic tool,can offer predictive information on the five-year survival rate(FYSR)in the setup of a prognostic therapeutic *** approach provides the individuality and accuracy of prognosis for FYSR of gastric cancer(GC).Unlike traditional neoplasm staging criteria,our technique ensures accuracy and individuality without relying on statistical data and empirical study.

关键词： cancer gastric prognosis