检索结果-南通市图书馆

The Role of the Size Effect on the Drying of Refractory Castables—how Its Under-standing Could Narrow the Gap between Laboratory Studies and Industrial Reality

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China's Refractories 2024年第2期33卷 35-40页

作者： M.h.MOREIRA h.peng S.Dal PONT V.C.PANDOLFELLI Materials Engineering Department Federal University of São Carlos(UFSCar)São Carlos 13565-905Brazil Materials Innovation Elkem Silicon Products DevelopmentKristiansand 4621Norway CNRS Grenoble INP3SRUniversitéGrenoble AlpesGrenoble 38000France

Refractories have unique capabilities such as sustaining their shape and properties at extreme conditions such as the combination of high temperatures and thermal shock,contact with molten metals and slags and in some circumstances resistance to erosion from abrasive *** the large processing output of the heavy industries such as the cement and steel ones which both require high temperature processes,the refractories structures span various meters and weight of several *** the water removal stage of hydraulic bonded castables in industrial sites takes hours(10-60 h)due to the risk of explosive spalling,efforts to mitigate it are commonly *** has provided theoretical understanding of the general aspects of drying and important tools,such as the thermogravimetry analysis(TGA),for the design of refractory compositions with higher explosive spalling ***,the optimization of this process is still far from the industrial reality especially because the actual linings that require the drying are orders of magnitude larger than the samples considered in the laboratory ***,this study proposed the analysis of the sample volume effect on the water removal dynamics through TGA of high alumina castables with calcium aluminate ***φ5 cm×5 cm cylindrical samples were assessed in a laboratory scale equipment whereas macro TGA were carried out considering 20 cm×20 cm×20 cm and 30 cm×30 cm×30 cm cubic ***,the effect of polymeric fibers was also *** was found out that the different thermal gradients within the macro TGA samples resulted in an inflection on the sample’s heating rate and that the mass loss was affected by the volume considered,especially for the composition without *** findings highlight the requirement of carefully taking into consideration the different dimensional sizes and thermal gradients in the samples when analyzing and interpreting the laboratory studies,and

关键词： drying refractory castables size effect thermogravimetry analysis

Evolving role of adiponectin in cancer-controversies and update

在线全文

学校读者我要写书评

暂无评论

Cancer Biology & Medicine 2016年第1期13卷 101-119页

作者： Arnav Katira peng h.Tan UCL Medical School UCL Faculty of Medical Science University College London London WC1E 6BT UK Breast Unit Whittington Health London N19 5NF UK

Adiponectin(APN), an adipokine produced by adipocytes, has been shown to have a critical role in the pathogenesis of obesityassociated malignancies. Through its receptor interactions, APN may exert its anti-carcinogenic effects including regulating cell survival, apoptosis and metastasis via a plethora of signalling pathways. Despite the strong evidence supporting this notion, some work may indicate otherwise. Our review addresses all controversies critically. On the whole, hypoadiponectinaemia is associated with increased risk of several malignancies and poor prognosis. In addition, various genetic polymorphisms may predispose individuals to increased risk of obesity-associated malignancies. We also provide an updated summary on therapeutic interventions to increase APN levels that are of key interest in this field. To date efforts to manipulate APN levels have been promising, but much work remains to be done.

关键词： Adiponectin cancer therapeutic target

EFFECT OF TESTING ENVIRONMENT ON FRACTURING BEhAVIOR OF Fe_3Si BASED ALLOY

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2003年第2期16卷 104-109页

作者： J.h.peng G.L.Chen National Key Laboratory for Nuclear Fuel&Materials China Nuclear Power InstituteChengdu 610041ChinaState Key Laboratory for Advanced Metal MaterialsUniversity of Science&Technology BeijingBeijing 100083China

The mechanical behavior of Fes Si based alloy with B2 structure was studied by tension and fracture toughness test in various testing media. The fracture strength σb of Fe3Si alloy decreased in the following order: oxygen, air and hydrogen respectively. The fracture toughness in different testing environment showed that KIC in oxygen is 11.5±0.3MPa·m1/2, and is 8.6±0.4MPa·ml/2 in distilled water. The reduction of fracture toughness is contributed to the environmental reaction of Si with water. Addition of Al element in Fe3Si is not beneficial to improve the intrinsic ductility of Fe-14Si-3Al alloy. The scattering phenomenon of fracture strength was found, and explained by fracture mechanics. It was found by means of SEM that the fracture mode changed from transgranular in oxygen to intergranular in hydrogen gas and distilled water.

关键词： Fe3Si intermetallic mechanical behavior environmental em- brittlement

Chromatic Uniqueness of Certain Complete Tripartite Graphs

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2011年第5期27卷 919-926页

作者： G. C. LAU Y. h. peng Faculty of Computer & Mathematical Sciences Universiti Teknologi MARA (Segamat Campus) 85100 Segamat Johor Malaysia Department of Mathematics and Institute for Mathematical Research Universiti Putra Malaysia 43400 UPM Serdang Malaysia

Let P（G,A） be the chromatic polynomial of a graph G. A graph G is chromatically unique if for any graph h, P（h, λ） = P（G, λ） implies h is isomorphic to G. Liu et al. [Liu, R. Y., Zhao, h. X., Ye, C. F.： A complete solution to a conjecture on chromatic uniqueness of complete tripartite graphs. Discrete Math., 289, 175 179 （2004）], and Lau and peng [Lau, G. C., peng, Y. h.： Chromatic uniqueness of certain complete t-partite graphs. Ars Comb., 92, 353-376 （2009）] show that K（p - k,p - i,p） for i = 0, 1 are chromatically unique if p ≥ k ＋ 2 ≥ 4. In this paper, we show that if 2 〈 i 〈 4, the complete tripartite graph K（p - k,p - i,p） is chromatically unique for integers k ≥ i and p 〉 k2/4 ＋ i ＋ 1.

关键词： Complete tripartit graphs chromatic polynomial chromatic uniqueness

A continuum traffic flow model with the consideration of coupling effect for two-lane freeways

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2011年第2期27卷 228-236页

作者： D.-h. Sun G.-h. peng L.-P. Fu h.-P. he College of Automation Chongqing University400030 Chongqing China Department of Civil & Environmental Engineering University of Waterloo Waterloo Ontario N2L 3G 1 Canada College of Automation Chongqing University 400030 Chongqing China

A new higher-order continuum model is proposed by considering the coupling and lane changing effects of the vehicles on two adjacent lanes. A stability analysis of the proposed model provides the conditions that ensure its linear stability. Issues related to lane changing, shock waves and rarefaction waves, local clustering and phase transition are also investigated with numerical experiments. The simulation results show that the proposed model is capable of providing explanations to some particular traffic phenomena commonly observable in real traffic flows.

关键词： Two-lane traffic Two delay time scales model Numerical simulation Coupling effect Phase transition

The Role of TNF Related Apoptosis-Inducing Ligand in Neurodegenerative Diseases

在线全文

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2005年第2期2卷 113-122页

作者： Y.huang N.Erdmann h.peng Y.Zhao ThelaboratoryofNeurotoxicologyattheCenterforNeurovirology＆NeurodegenerativeDisorders ／／Dept.Pharmacology Dept.ofSurgery UniversityofNebraskaMedicalCenterOmahaNE68198-5880USA／／InstituteofAnimalResearchChineseAcademyofScienceChina

A hallmark of all forms of neurodegenerative diseases is impairment of neuronal functions,and in many cases neuronal cell *** the etiology of neurodegenerative diseases may be distinct,different diseases display a similar pathogenesis,for example abnormal immunity within the central nervous system(CNS),activation of macrophage/microglia and the involvement of proinflammatory *** studies show that neurons in a neurodegenerative state undergo a highly regulated programmed cell death,also called ***-related apoptosis-inducing ligand(TRAIL),a member of the TNF family,has been shown to be involved in apoptosis during many *** one member of a death ligand family,TRAIL was originally thought to target only tumor cells and was not present in ***,recent data showed that TRAIL was unregulated in hIV-1-infected and immune-activated macrophages,a major disease inducing cell during hIV-1-assoeiated dementia(hAD).TRAIL is also induced on neuron by β-amyloid protein,an important pathogen for Alzheimer's *** this review,we summarize the possible common aspects that TRAIL involved those neurodegenerative diseases,TRAIL induced apoptosis signaling in the CNS cells,and specific role of TRAIL in individual *** & Molecular Immunology.2005;2(2):113-122.

关键词： Alzheimer's disease hⅣ-1 associated dementia multiple sclerosis apoptosis TRAIL macrophage

Complex interaction of adiponectin-mediated pathways on cancer treatment: a novel therapeutic target

在线全文

学校读者我要写书评

暂无评论

Journal of Cancer Metastasis and Treatment 2019年第3期4卷 108-130页

作者： Massimo Monks Foivos Irakleidis peng h.Tan UCL Medical School Faculty of Medical ScienceRoyal Free NHS Foundation HospitalLondon NW32QGUK Breast Unit Department of SurgeryRoyal Free NHS Foundation TrustLondon NW32QGUK

Obesity has the far reaching consequence on cancer pathogenesis and immune *** particular,adiponectin(APN)produced by adipocytes played an important role in modulating obesity related *** its interaction with corresponding receptors and their downstream signalling pathways,it regulates cells survival,apoptosis and cancer *** review dissects the clinical evidence on how hypoadiponectinaemia associated with the increased risks of several cancers and the long-term prognosis and also addresses the *** also has its indirect effect on anti-cancer immune response which may influence the disease *** also analyse the impact of APN on the immune system,the anti-tumour responses and the controversies surrounding this *** therapeutics on APN and its receptor axis represents a promising and novel anti-cancer *** understanding of how APN and its interaction with its receptors may affect the immune *** strategizing the use of APN therapeutics in cancer treatment is important,as the APN receptor signalling on the immune cells can blunt anti-tumour *** APN or its receptors has an enormous implication for the treatment of cancers.

关键词： Adiponectin AdipoR1/R2 Cancer signaling pathway anti-tumor immunity therapeutic targets

The strain rate sensitive and anisotropic behavior of rare-earth magnesium alloy ZEK100 sheet

维普期刊数据库评论

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 Magnesium and Alloys 2023年第3期11卷 882-891页

作者： h.Wang X.Sun S.Kurukuri M.J.Worswick D.Y.Li Y.h.peng P.D.Wu State Key Laboratory of Mechanical Systems and Vibration Shanghai Jiao Tong UniversityShanghai 200240China Materials Genome Initiative Center Shanghai Jiao Tong UniversityShanghai 200240China Department of Mechanical and Mechatronics Engineering University of WaterlooWaterlooOntario N2L 3G1Canada Department of Mechanical Engineering Mc Master UniversityHamiltonOntario L8S 4L7Canada

To overcome the limitation in formability at room temperature,manufacturers have developed magnesium alloys with remarkable properties by adding rare-earth *** rare-earth magnesium alloys behave differently from the conventional alloys,especially with respect to their coupled anisotropic and strain rate sensitive *** the current work,such behavior of the rare-earth Mg alloy ZEK100 sheet at room temperature is investigated with the aid of the elastic viscoplastic self-consistent polycrystal plasticity *** strain rate sensitivities(SRSs)for various deformation modes are employed by the model to simulate the strain rate sensitive behaviors under different loading directions and loading *** agreement between the experiments and simulations reveals the importance and necessity of using different SRSs for each deformation mode in hexagonal close-packed ***,the relative activities of each deformation mode and the texture evolution during different loadings are *** anisotropic and strain rate sensitive behavior is ascribed to the various operating deformation modes with different SRSs during loading along different directions.

关键词： Rare-earth magnesium alloy Strain rate sensitivity Twinning Crystal plasticity

A STUDY OF TEMPERATURE-DEPENDENT VALENCE BOND STRUCTURE OF TITANIUM

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2007年第1期20卷 27-34页

作者： X.B. Li Y.Q. Xie Y.Z. Nie h.J. peng h.J. Tao F.X. Yu College of Materials Science and Engineering Central South University Changsha 410083 China

On the basis of energy and shape method for the determination of the valence bond （ VB ） structures of crystal, the valence bond structure of titanium is redetermined at room temperature and calculated in the whole temperature range of 0-1943K. The outer shell electronic distribution of Ti is ec^29907. （sc^0.4980 ＋ dc^2.4927） ef^1.0098 in crystal. The temperature dependences of the VB structures of hcp and bcc phases are the same. The VB structures of hcp and bcc phases monotonically increase or decrease with the increase in temperature, but show discontinuous changes at the phase-transformation temperature 1155K.

关键词： valence bond structure temperature titanium