检索结果-南通市图书馆

Free vibration and transient response of double curved beams connected by intermediate straight beams

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(english edition) 2025年第1期46卷 37-62页

作者： R.A.JAFARI-TALOOKOLAeI H.GHANDVAR e.JUMAeV S.KHATIR T.CUONG-Le School of Mechanical engineering Babol Noshirvani University of Technology Department of Mechanical engineering Faculty of Engineering New Uzbekistan University University of Business and Science Center for engineering Application and Technology Solutions Ho Chi Minh City Open University

This paper investigates the free vibration and transient response of interconnected structures including double curved beams and intermediate straight beams,which are all constructed from functionally graded porous(FGP) materials. The strain potential and kinetic energies of each beam along with the work done by the external force are calculated. Additionally, a higher-order beam element is introduced to derive stiffness and mass matrices, along with the force vector. The curved and straight beams are discretized, and their assembled stiffness, mass matrices, and force vectors, are *** conditions at the joints are used to derive the total matrices of the entire structure. Subsequently, the natural frequencies and transient response of the system are determined. The accuracy of the mathematical model and the self-developed computer program is validated through the comparison of the obtained results with those of the existing literature and commercial software ANSYS, demonstrating excellent ***, a comprehensive study is conducted to investigate the effects of various parameters on the free vibration and transient response of the considered structure.

关键词：

Assessment of liver ablation using cone beam computed tomography

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2015年第2期21卷 517-524页

作者： Mohamed Abdel-Rehim Maxime Ronot annie Sibert Valérie Vilgrain Department of Radiology APHPUniversity Hospitals Paris Nord Val de Seine92110 ClichyFrance University Paris Diderot Sorbonne Paris Cité75012 ParisFrance INSeRM U1149 Centre de Recherche Biomédicale Bichat-BeaujonCRB375018 ParisFrance

AIM: To investigate the feasibility and accuracy of cone beam computed tomography(CBCT) in assessing the ablation zone after liver tumor ***: Twenty-three patients(17 men and 6 women, range: 45-85 years old, mean age 65 years) with malignant liver tumors underwent ultrasoundguided percutaneous tumor ablation [radiofrequency(n = 14), microwave(n = 9)] followed by intravenous contrast-enhanced CBCT. Baseline multidetector computed tomography(MDCT) and peri-procedural CBCT images were compared. CBCT image quality was assessed as poor, good, or excellent. Image fusion was performed to assess tumor coverage, and quality of fusion was rated as bad, good, or excellent. Ablation zone volumes on peri-procedural CBCT and post-procedural MDCT were compared using the nonparametric paired Wilcoxon ***: Rate of primary ablation effectiveness was 100%. There were no complications related to ablation. Local tumor recurrence and new liver tumors were found 3 mo after initial treatment in one patient(4%). The ablation zone was identified in 21/23(91.3%) patients on CBCT. The fusion of baseline MDCT and peri-procedural CBCT images was feasible in all patients and showed satisfactory tumor coverage(at least 5-mm margin). CBCT image quality was poor, good, and excellent in 2(9%), 8(35%), and 13(56%), patients respectively. Registration quality between periprocedural CBCT and post-procedural MDCT images was good to excellent in 17/23(74%) patients. The median ablation volume on peri-procedural CBCT and post-procedural MDCT was 30 cm3(range: 4-95 cm3) and 30 cm3(range: 4-124 cm3), respectively(P-value > 0.2). There was a good correlation(r = 0.79) between the volumes of the two techniques. CONCLUSION: Contrast-enhanced CBCT after tumor ablation of the liver allows early assessment of the ablation zone.

关键词： Ablation Cone beam computed tomography Liver Malig

玩转生活、职场、考试、出国1000必学语法细节

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

In vitro evaluation of anti-acetylcholinesterase and free radical scavenging potential of leaf extracts of some selected medicinal plants

作者： Xiao annie 金智骏

来源：南通市图书馆图书评论

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2019年第2期9卷 60-65页

作者： annie Jessica Toppo Sheela Chandra Dhruv Jha Papiya Mitra Mazumder Department of Bio-engineering Birla Institute of Technology Department of Pharmaceutical Sciences and Technology Birla Institute of Technology

Objective: To evaluate the phytochemical present in various solvent extracts from leaves of Ocimum sanctum(L.), Swertia chirayita(L.), Butea monosperma(Lam.) and Stevia rebaudiana(Bert.) as well as antioxidant and anticholinergic activities employing different in vitro models. Methods: Total phenol content of diethyl ether, chloroform and methanolic extracts obtained from leaves of different medicinal plants was determined by Folin-Ciocalteau's spectrophotometric method. Moreover, antioxidant and anticholinergic studies were conducted by four different in vitro methods which included diphenyl picrylhydrazyl radical scavenging, 2,2-azinobis(3-ethylbezoline-6-sulphonic acid), reducing activity by ferrous reduced antioxidant power and anti-acetylcholinesterase assay, in order to ensure pharmacological potential of the plants. Results: The methanolic leaf extract of Ocimum sanctum showed the highest total phenol content which was(21.13±1.04) GAe/g DW and antioxidant activities compared to other plants with the IC50 value of 40.43 μg/mL in diphenyl picrylhydrazyl radical scavenging assay and 53.5 μg/mL in 2,2-azinobis(3-ethylbezoline-6-sulphonic acid) assay as well as metal ion reduced by(78.22±0.38) Te/g DW in ferrous reduced antioxidant power assay. The inhibition percentage of the anti-acetylcholinesterase assay was(94.22±0.26)%. Conclusions: The results of our current study show that Ocimum sanctum leaf is the most significant source of phytochemicals that possesses antioxidant and anticholinergic properties. However, further investigation on isolation and characterization of active compound which is responsible for the pharmacological potential is needed.

关键词： DPPH assay Antioxidant Free radical Anti-acetylcholinesterase Phenolics content

Semi-analytical Monte Carlo simulation of laser-induced fluorescence propagation in an optically participating spray

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 Zhejiang University-Science A(Applied Physics & engineering) 2007年第7期8卷 1170-1178页

作者： CHeN Ling-hong ROZe Claude GARO annie GIRASOLe Thierry CeN Ke-fa GReHAN Gérard State Key Laboratory of Clean energy Utilization Zhejiang University Hangzhou 310027 China Laboratoire d＇electromagnétisme et Systémes Particulaires Universite ＆ INSA Rouen CORIA/CNRS UMR 6614 France

A semi-analytical Monte Carlo (SMC) simulation was developed to simulate the propagation of laser-induced fluo- rescence (LIF) in an optically participating spray, which simultaneously exhibits spectrally dependent emission, anisotropic scattering, absorption, and re-emission. The SMC simulation is described and then applied to an experimental configuration of a cloud of polydisperse droplets composed of water and sulforhodamine B dye. In the SMC simulation, the collected LIF flux on the remote receptor element is calculated as the global contribution from the emissive source, single, twice, … and nth collision events in any sequence. The effects on the fluorescence photons propagation of spray parameters like the dye concentration, droplets concentration, and droplets size are examined. Three spectral bands representing different optical properties are chosen to analyze the interference of absorption, scattering and re-emission on the detected LIF flux. The obtained spectral LIF flux distribution on the receptor demonstrates a “red shift” phenomenon.

关键词： Laser-induced fluorescence (LIF) Semi-analytical Monte Carlo (SMC) simulation Absorption Anisotropic scattering Re-emission Spray

维普期刊数据库

GReeN LUXURY:A CASe STUDY OF TWO GReeN HOTeLS

在线全文

学校读者我要写书评

暂无评论

Journal of Green Building 2013年第1期8卷 90-119页

作者： Yong Han Ahn annie R.Pearce Western Carolina University Myers-Lawson School of Construction Virginia Tech

The hotel industry is beginning to implement green design and construction practices,saving energy,water,and resources and thus helping to preserve the *** addition,green building practices also can provide healthy and comfortable indoor environments to hotel occupants including guests and ***,there is the potential for conflict between green building practices and hotel guests’satisfaction and comfort,as the conservation of resources could detract from the quality of a guest’s visitor *** study adopted a case study approach to identify and analyze green design and construction practices that create a green and luxurious environment without damaging the hotels’financial *** in-depth literature review was conducted to identify green design and construction practices,design features of premium hotels,and major design conflicts between the twin goals of green building and a luxurious hotel *** LeeD platinum hotels(the Proximity Hotel and the Bardessono Hotel,both in the United States)were selected and data collected on their green design and construction practices,luxurious design features,and operation and maintenance practices from multiple sources,including the owner,designer,contractor,engineer,and LeeD *** the perspective of the entire lifecycle of the building,this data was analyzed to identify green design and construction practices that not only provide a green,luxurious environment but also enhance the hotels’financial strength.

关键词： green building green design and construction practice hotel industry case study

Moderating effect of Perceived Threat of Breast Cancer on Relation between Knowledge and Breast Self examination

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Psycho-Oncologie 2024年第1期18卷 59-68页

作者： Carolle annie Njopvoui Armel Valdin Teague Tsopgny Henri Rodrigue Njengoue Ngamaleu Facultédes Sciences de l'Éducation Universitéde YaoundéYaoundéCameroun

estimated at more than 2.2 million cases worldwide,most breast cancer cases and deaths from breast cancer occur in low and middle-income *** Cameroon,many studies have underlined the effect of knowledge of breast cancer on screening measures such as self-examination and,to a lesser extent,the perception of the threat of this *** research aims to assess according to the Health Belief Model(HBM),the moderating effect of perceived threat of breast cancer on the relation between knowledge and breast self-examination.A questionnaire survey was conducted among 517 Cameroonian women to assess their general knowledge about breast cancer(risk factors and screening measures),their level of the perceived threat of breast cancer through Perceived susceptibility and severity,and the prevalence of breast self-examination amongst them.A regression analysis using the Macro Process for moderation indicates the main effect of Perceived threat(b=0,29;t(517)=2,36;p=0,02)of breast cancer and knowledge(b=0,02;t(517)=4,29;peast *** also confirm that the perceived threat of breast cancer moderates the effect of knowledge on breast *** the low level of perceived threat highlights the effect of knowledge on breast self-examination(b=0,02;t(517)=3,49;pe high level of perceived threat cancels that effect(b=0,01;t(517)=1,97;p=0,01).A woman who perceives severity and susceptibility to breast cancer is more inclined to perform breast *** result suggests the importance of taking into account,in a context where knowledge of breast cancer is limited,relevant factors of the health belief model in preventive measures against breast cancer in general and the practice of breast self-examination in particular.

关键词： Knowledge perceived threat breast cancer breast self-examination moderation effect HBM

Transcriptome analysis of ankylosed primary molars with infraocclusion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Oral Science 2020年第1期12卷 68-76页

作者： annie Tong Yuh-Lit Chow Katie Xu Rita Hardiman Paul Schneider Seong-Seng Tan Melbourne Dental School The University of MelbourneMelbourneAustralia Florey Institute of Neuroscience The University of MelbourneMelbourneAustralia

Primary molar ankylosis with infraocclusion can retard dental arch development and cause dental asymmetry. Despite its widespread prevalence, little is known about its molecular etiology and pathogenesis. To address this, RNA sequencing was used to generate transcriptomes of furcal bone from infraoccluded(n = 7) and non-infraoccluded(n = 9) primary second molars, all without succeeding biscuspids. Of the 18 529 expressed genes, 432(2.3%) genes were differentially expressed between the two groups(false discovery rate erarchical clustering and principal component analysis showed clear separation in gene expression between infraoccluded and non-infraoccluded samples. Pathway analyses indicated that molar ankylosis is associated with the expression of genes consistent with the cellular inflammatory response and epithelial cell turnover. Independent validation using six expressed genes by immunohistochemical analysis demonstrated that the corresponding proteins are strongly expressed in the developing molar tooth germ, in particular the dental follicle and inner enamel epithelium. The descendants of these structures include the periodontal ligament, cementum, bone and epithelial rests of Malassez;tissues that are central to the ankylotic *** therefore propose that ankylosis involves an increased inflammatory response associated with disruptions to the developmental remnants of the dental follicle and epithelial rests of Malassez.

关键词： occlusion infra molar

维普期刊数据库

On the use of formal methods to model and verify neuronal archetypes

在线全文

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2022年第3期16卷 101-122页

作者： elisabetta De MARIA Abdorrahim BAHRAMI Thibaud L'YVONNeT Amy FeLTY Daniel GAFFÉ annie ReSSOUCHe Franck GRAMMONT UniversitéCôte d'zur CNRSI3S06903 Sophia Antipolis CedexFrance School of electrical engineering and Computer Science University of OttawaOntarioK1N 6N5Canada UniversitéCôte d'Azur INRIA SAM06902 Sophia Antipolis CedexFrance UniversitéCôte d'Azur CNRSLEAT06903 Sophia Antipolis CedexFrance UniversitéCôte d'Azur CNRSLJAD06108 Nice Cedex 02France

Having a formal model of neural networks can greatly help in understanding and verifying their properties,behavior,and response to external factors such as disease and *** this paper,we adopt a formal model to represent neurons,some neuronal graphs,and their *** specific neuronal graphs are known for having biologically relevant structures and behaviors and we call them *** archetypes are supposed to be the basis of typical instances of neuronal information *** this paper we study six fundamental archetypes(simple series,series with multiple outputs,parallel composition,negative loop,inhibition of a behavior,and contralateral inhibition),and we consider two ways to couple two archetypes:(i)connecting the output(s)of the first archetype to the input(s)of the second archetype and(ii)nesting the first archetype within the second *** report and compare two key approaches to the formal modeling and verification of the proposed neuronal archetypes and some selected *** first approach exploits the synchronous programming language Lustre to encode archetypes and their couplings,and to express properties concerning their dynamic *** properties are verified thanks to the use of model *** second approach relies on a theorem prover,the Coq Proof Assistant,to prove dynamic properties of neurons and archetypes.

关键词： neuronal networks leaky integrate and fire modeling synchronous languages model checking theorem proving Lustre Coq formal methods

维普期刊数据库