检索结果-南通市图书馆

Analysis of a concrete Structure that Was Exposed to Fires in the Metropolitan Region of Recife

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 civil Engineering and Architecture 2016年第3期10卷 344-352页

作者： Romildo Alves Berenguer Adauto de Holanda Barbosa Eliana cristina Barreto Monteiro Romilde Almeidade oliveira Angelo Just da costa e Silva Department of civil Engineering Catholic University of Pernambuco Recife 51110-200 Brazil Department of civil Engineering University of Pernambuco Recife 51110-200 Brazil

In large cities, news about fires in buildings are powered by problems such as old wiring and no maintenance. Accidents with chemicals and human error, which when added to the different characteristics of each fire and structures can generate the factors causing these disasters. The gradual rise in temperature causes a different effect in mortar and concrete parts, verifying the change in coloring provided to loss of mechanical strength and surface crumbling, cracking and disintegration of the structure itself. This paper presents a case study in which a building that is located in the metropolitan region of Recife was exposed to a fire situation. The metropolitan region of Recife is composed of several old buildings that by virtue of their age may have delayed construction methods, and may expose the fragility of the concrete used in its construction on a fire situation. The concrete structures are recognized by the good resistance to fire because of the thermal characteristics of the material, however, the temperature rise in the concrete elements in characteristic causes a reduction in strength and modulus of elasticity of the material, the loss in stiffness leading to polyphase degradation of reinforced concrete, structural parts can lead to ruin, but when properly sized and executed, the concrete can serve as a proactive agent to be exposed to high temperatures, as the same may be subjected to high temperatures accidentally or they may be part of their normal work.

关键词： Awning pathological manifestations durability

Skeletal metastasis:treatments,mouse models,and the Wnt signaling

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

chinese Journal of cancer 2013年第7期32卷 380-396页

作者： Kenneth c.Valkenburg Matthew R.Steensma Bart O.Williams Zhendong Zhong center for Skeletal Disease Research Van Andel Research Institute333 Bostwick Ave.NEGrand RapidsMI 49503USA Orthopedic Oncology Spectrum Health145 Michigan St.NEGrand RapidsMI 49503USA

Skeletal metastases result in significant morbidity and *** is particularly true of cancers with a strong predilection for the bone,such as breast,prostate,and lung *** is currently no reliable cure for skeletal metastasis,and palliative therapy options are *** Wnt signaling pathway has been found to play an integral role in the process of skeletal metastasis and may be an important clinical *** experimental models of skeletal metastasis have been used to find new biomarkers and test new *** this review,we discuss pathologic process of bone metastasis,the roles of the Wnt signaling,and the available experimental models and treatments.

关键词：治疗小鼠模型 Wnt信号通路信令实验模型生物标志物前列腺癌病理过程

Thermal Stability of Retained Austenite in TRIP Steel After Different Treatments

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2008年第1期15卷 61-64页

作者： SHI Wen LI Lin Bruno c De cooman Patrick Wollants YANG chun-xia Department of Material Science and Engineering Shanghai University Shanghai 200072 China Laboratory for Iron and Steel Making Department of Material Science and Engineering Technologiepark 903 BE-9052 Ghent Belgium Department MTM KU Leuven Heverlee B-3001 Belgium

Thermal decomposition of retained austenite in TRIP steel was investigated by means of differential scanning calorimetry（DSc）.The decomposition curve was abnormal,and the decomposition temperature and the activation energy were measured by the Kissinger method,which were all higher than those in quenched *** thermal decomposition data of samples soaked in liquid nitrogen after TRIP treatment were all similar to those without additional low temperature *** indicated that there is a high thermal stability in retained austenite of the TRIP steel at low temperature,which was also proved by XRD analysis.

关键词： TRIP steel retained austenite thermal stability differential scanning calorimetry

Perspectives on the role of Pannexin 1 in neural precursor cell biology

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2016年第10期11卷 1540-1544页

作者： Juan c.Sanchez-Arias Leigh E.Wicki-Stordeur Leigh Anne Swayne Division of Medical Sciences University of Victoria Island Medical Program and Department of cellular and Physiological Sciences University of British Columbia

We recently reported that targeted deletion of Pannexin 1 in neural precursor cells of the ventricular zone impairs the maintenance of these cells in healthy and stroke-injured brain. Here we frame this exciting new finding in the context of our previous studies on Pannexin 1 in neural precursors as well as the close rela- tionship between Pannexin 1 and purinergic receptors established by other groups. Moreover, we identify important gaps in our understanding of Pannexin 1 in neural precursor cell biology in terms of the under- lying molecular mechanisms and functional/behavioural outcomes.

关键词： neural precursor ventricular zone pannexin ATP cytoskeleton proliferation phagoptosis

Friction anisotropy dependence on lattice orientation of graphene

在线全文

学校读者我要写书评

暂无评论

Science china(Physics,Mechanics & Astronomy) 2014年第4期57卷 663-667页

作者： ZHANG Yu LIU LianQing XI Ning WANG Yuechao DONG ZaiLi WEJINYA Uchechukwu c State Key Laboratory of Robotics Shenyang Institute of Automation Chinese Academy of Sciences University of chinese Academy of Sciences Department of Mechanical and Biomedical Engineering City University of HongKong Department of Mechanical Engineering University of ArkansasFayetteville Arkansas 72701 USA

The observation of friction anisotropy on graphene by friction measurement at atomic scale has been reported in this ***-scale friction measurement revealed friction anisotropy with a periodicity of 60°,which is consistent with the hexagonal periodicity of the *** experiments and theory show that the value of the friction force is related to the graphene lattice orientation,and the friction force along armchair orientation is also larger than the one along zigzag *** results will play a critical role in the use of graphene to manufacture nanoscale devices.

关键词： graphene friction anisotropic lattice orientation

Endoscopic ultrasound-guided celiac plexus neurolysis using a reverse phase polymer

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2010年第6期16卷 728-731页

作者： Keith L Obstein Fernanda P Martins Gloria Fernández-Esparrach christopher c Thompson Gastroenterology Division Brigham and Women's Hospital Federal University of So Paulo Department of Gastroenterology Endoscopy UnitHospital Clinic(Spain)

AIM:To assess the feasibility of endoscopic ultrasound(EUS)guided celiac plexus neurolysis(cPN) using a poloxamer. METHODS:In this prospective evaluation,six Yorkshire pigs underwent EUS-guided *** received an injection of 10 mL of 0.25%Lidocaine plus methylene blue(group 1) and three received an injection of 10 mL of 0.25%Lidocaine plus blue colored poloxamer(PS137-25)(group 2) .Necropsy was performed immediately after the animals were *** abdominal and pelvic cavities were examined for the presence of methylene blue and the blue colored ***:EUS-guided cPN was successfully performed in all 6 pigs without immediate *** blue was identified throughout the peritoneal and retroperitoneal cavity in group *** blue colored poloxamer was found in the retroperitoneal cavity immediately adjacent to the aorta,in the exact location of the celiac plexus in group ***:EUS-guided cPN using a reverse phase polymer in a non-survival porcine model was technically *** presence of a poloxamer gel at the site of the celiac plexus at necropsy indicates a precise delivery of the neurolytic agent.

关键词： celiac plexus neurolysis celiac plexus blockade Endoscopic ultrasound Polymer

Moth Flame Optimization Based FcNN for Prediction of Bugs in Software

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Intelligent Automation & Soft computing 2023年第5期36卷 1241-1256页

作者： c.Anjali Julia Punitha Malar Dhas J.Amar Pratap Singh Department of cSE Noorul Islam Center for Higher Studies629180Tamil NaduIndia

The software engineering technique makes it possible to create high-quality *** of the most signiﬁcant qualities of good software is that it is devoid of *** of the most time-consuming and costly software proce-dures isﬁnding andﬁxing *** it is impossible to eradicate all bugs,it is feasible to reduce the number of bugs and their negative *** broaden the scope of bug prediction techniques and increase software quality,numerous causes of software problems must be identiﬁed,and successful bug prediction models must be *** study employs a hybrid of Faster convolution Neural Network and the Moth Flame Optimization(MFO)algorithm to forecast the number of bugs in software based on the program data itself,such as the line quantity in codes,methods characteristics,and other essential software ***,the MFO method is used to train the neural network to identify optimal *** proposed MFO-FcNN technique is compared with existing methods such as AdaBoost(AB),Random Forest(RF),K-Nearest Neighbour(KNN),K-Means clustering(KMc),Support Vector Machine(SVM)and Bagging clas-siﬁer(Bc)are examples of machine learning(ML)*** assessment method revealed that machine learning techniques may be employed successfully and through a high level of *** obtained data revealed that the proposed strategy outperforms the traditional approach.

关键词： Faster convolution neural network Moth Flame Optimization(MFO) Support Vector Machine(SVM) AdaBoost(AB) software bug prediction

Expression of cyclooxygenase-2 is associated with p53 accumulation in premalignant and malignant gallbladder lesions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2006年第21期12卷 3425-3429页

作者： Mateja Legan Bo(s|ˇ)tjan Luzar Vera Ferlan Marolt Andrej c(o|¨)r Institute for Histology and Embryology Medical Faculty University of Ljubljana Korytkova 21000 LjubljanaSlovenia Institute of Pathology Medical Faculty University of Ljubljana Korytkova 21000 LjubljanaSlovenia

AIM： To examine the relationship between cyclooxygenase-2 （cOX-2） overexpression and p53 accumulation in gallbladder carcinoma and its precursor ***： Sixty-eight gallbladder tissue samples comprising 14 cases of normal gallblader epithelium, 27 cases of dysplasia （11 low-grade dyplasia and 16 high-grade dysplasia） and 27 adenocarcinomas were evaluated by immunohistochemistry for cOX-2 expression and p53 accumulation. The relationship among cOX-2 expression, p53 accumulation and clinicopathological characteristics was ***： cOX-2 was expressed in 14.3% of normal gallbladder epithelium, 70.3% of dysplastic epite hlium, and 59.2% of adenocarcinomas. When divided into low- and high-grade dysplasia, cOX-2 was positive in 5 （45.4%） cases of low-grade and 2d （87.5%） of high- grade dysplasia （P = 0.019）. Accumulation of p53 was detected in 5 （32.2%） cases of high-grade dysplasia and in 23 （48.2%） of carcinomas. No p53 accumulation was found in normal epithelium or low-grade dysplasia. cOX-2 overexpression was observed in 27 of 28 （94.4%） cases with p53-accumulation in comparison with 20 （40.0%） out of 50 cases without p53 accumulation （P 〈 0.001）.cONcLUSION： The significant differences in cOX-2 expression among normal epithelium, low-grade dysplasia and high-grade dysplasia suggest that overexpression of cOX-2 enzyme is an early event in gallbladder carcinogenensis. Furthermore, since accumulation of p53 correlates with cOX-2 expression, cOX-2 overexpression observed in gallbladder high-grade dysplasia and carcinoma might be partly due to the dysfunction of p53.

关键词： Gallbladder carcinogenesis cyclooxygenase-2 p53 Immunohystochemistry

Investigation in Longitudinal compression of Wool Based Suiting Fabrics

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 china Textile University(English Edition) 1999年第4期16卷 95-100页

作者： LeungMei-yi LoT.Y. DhingraR.c. Yeung K.W.

This paper describes an investigation in the fabric longi-tudinal compressibility of thirty-one suiting and trouse-ring materials using a newly developed device attached to the advanced Instron extensometer *** at-tachment was designed mainly to ensure a correct align-meat of fabric plane at the start of *** newly developed testing method,fabric longitudinalcompression curve was obtained and the results of longi-tudinal compressibility measured by two different com-pression load ranges(from 0 to 0.5 N/m width and 0 to1 N/m width)were *** addition,their rela-tionships with the fabric low-stress mechanical proper-ties measured by the KES-F system were investigatedusing statistical *** results clearly indicatedthat significant differences existed when substituting fab-ric longitudinal compressibility with fabric extensibilitymeasured using the KES-F system under a *** infiuence of yarn rotational movement in fab-ric on the longitudinal

关键词： longitudinal compressibility extensibility shear rigidity formability and bending rigidity