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The Abrasive Wear of Non-Oxide Structural Ceramics in Wet Environment

Journal of Materials Science and Chemical Engineering 2014年第10期2卷 9-15页

作者： Z.Pedzich G.Grabowski I.Saferna M.Ziabka A.Gubernat J.Szczerba M.M.Bucko M.kot Department of Ceramics and Refractory Materials AGH-University of Science and Technology Krakow Poland Department of Machine Design and Technology AGH-University of Science and Technology Krakow Poland

Silicon carbide and silicon nitride are recognized as phases with very good mechanical properties. Many parts of machines and mechanical devices are made of these materials. Particulate composites basing on both mentioned phases have significant potential of properties improvement. The aim of presented work was to check the difference in wear behavior when materials surfaces were attacked by hard, loose particles in wet environment (pulp). Investigations were performed on silicon carbide, silicon nitride and two composites on their matrices. The basic performed test was the Miller Test according to ASTM Standard. The detail microstructural and mechanical characterization of investigated materials was done. Residual stress state caused by coefficients of thermal expansion mismatch was calculated using FEM approach. The second phases for composites were selected to introduce the compressive stress state into the matrix phase. Comparative studies of abrasive wear of “pure” phases and composites performed showed differences between dominating wear mechanisms. Tests results proved that the influence of the second phase presence in the materials was significant for the wear rate.

关键词： Abrasive Wear Miller Test Silicon Carbide Silicon Nitride Residual Stress

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Prototype of a Surface Ionization Source for Radioactive Ion Beams

Prototype of a Surface Ionization Source for Radioactive Ion...

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The Second Asian Particle Accelerator Conference

作者： A.V.Aleksandrov N.Kh.kot P.V.Logatchev S.V.Shiyankov A.Andrighetto L.Stroe L.Tecchio BINP Russia BINP Russia BINP Russia BINP Russia LNL-INFN Italy LNL-INFN Italy LNL-INFN Italy

＜正＞ The project of the RIB source prototype is presented as well as experimental results *** source represents the container of 238U compounds heated up to *** fission fragments obtained when the ion source is irradiated by the high energy neutronflux are then ionized and extracted from the *** the experiments with the prototype

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CT判定胰头癌可切除的准确性研究

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世界核心医学期刊文摘（胃肠病学分册） 2005年第12期1卷 6-7页

作者： Karmazanovsky G. Fedorov V. Kubyshkin V. kot- chatkov A. 郝筱倩 Radiology Department A. V. Vishnevsky Institute of Surgery RAMSc Bol. Serpukhovskaya Street 27 115093 Moscow Russian Federation

Background: Pancreatic cancer is a devastating disease whose early detection remains difficult. There is no 100% reliable imaging test to diagnose and stage pancreatic cancer. We assessed the surgical value of contrast- enhanced spiral computed tomography (CT) in predicting the resectability and survival rates of patients who had pancreatic head cancer. Methods: Eighty- nine patients who had pancreatic head cancer were investigated with spiral CT. Based on the preoperative CT results, we assigned patients to one of three CT groups based on resectability. Results: A correlation between classification of CT resectability and intraoperative finding was found in 83% of patients. The sensitivity, specificity, negative predictive value, positive predictive value, and accuracy of spiral CT in identifying predictive unresectability were 79% , 82% , 91% , 62% , and 81% , respectively. Sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of CT in diagnosis of vascular invasion were 94% , 84.2% , 94% , 84% , and 91.3% , respectively. Conclusions: The use of CT in the evaluation of pancreatic tumors provides valuable preoperative assessment of surgical resectability and should be performed for clinical examination. Classifying *** by tumor resectability on CT helps to estimate more precisely the tumor stage and to prognosticate survival rates of these patients.

关键词：胰头癌 CT 可切除性阳性预测率肿瘤分期影像学检查造影剂早期诊断特异性

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城市中心屋顶大气污染扩散公式的有效性

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中国卫生工程学 1999年第1期 3-8页

作者：刘瑶魏方 K.S.LAM S.C.kot K.W.FUNG R.Y.P.MA 武汉市卫生防疫站武汉430022 香港大学机械工程系

从屋顶平面的排气孔排出的示踪气体的扩散实验进行了十个月,对位于同一屋顶平面的新风口前的示踪气体的浓度进行了监测。实验楼位于一群相似高度的建筑物之中。采用Wilson的半经验公式,用一个修正系数来校正市中心测得的风速,就可获得... 详细信息

从屋顶平面的排气孔排出的示踪气体的扩散实验进行了十个月,对位于同一屋顶平面的新风口前的示踪气体的浓度进行了监测。实验楼位于一群相似高度的建筑物之中。采用Wilson的半经验公式,用一个修正系数来校正市中心测得的风速,就可获得保守估计的稀释率。

关键词：大气污染扩散稀释率城市中心建筑物屋顶风速计气体采样器排气孔新风口空调系统

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铁絮凝剂溶液的制备

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水处理信息报导 2002年第3期 36-36页

作者： kot Zbigniew

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Project of a Fast Neutron Target Based on a 10 MeV, 300 kW Proton Accelerator

Project of a Fast Neutron Target Based on a 10 MeV, 300 kW P...

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The Second Asian Particle Accelerator Conference

作者： M.Avilov K.Gubin N.kot P.Logatchev P.Martyshkin S.Morozov S.Shiyankov A.Starostenko A.Andrighetto Y.W.Bao L.Tecchio Ya.Kandiev V.Plokhoi S.Samarin BINP Russia BINP Russia BINP Russia BINP Russia BINP Russia BINP Russia BINP Russia BINP Russia LNL-INFN Italy LNL-INFN Italy LNL-INFN Italy VNIITF Russia VNIITF Russia VNIITF Russia

＜正＞ The project of high intense source of fast neutrons is *** source is based on thetarget irradiated by the proton beam with energy 10 MeV and mean power up to 300 *** of fabrication of such a target are *** hot ...

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Test of Materials for High-power Neutron Target

Test of Materials for High-power Neutron Target

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The Second Asian Particle Accelerator Conference

作者： M.Avilov K.Gubin N.kot P.Logatchev P.Martyshkin S.Morozov S.Shiyankov A.Starostenko V.Plokhoi S.Samarin V.Menshenin Y.Kandiev A.Andrighetto L.Stroe L.Tecchio BINP Russia VNIITFRussiaLNL-INFNItaly BINP Russia VNIITFRussiaLNL-INFNItaly BINP Russia VNIITFRussiaLNL-INFNItaly BINP Russia VNIITFRussiaLNL-INFNItaly BINP Russia VNIITFRussiaLNL-INFNItaly BINP Russia VNIITFRussiaLNL-INFNItaly BINP Russia VNIITFRussiaLNL-INFNItaly BINP Russia VNIITFRussiaLNL-INFNItaly BINP Russia VNIITFRussiaLNL-INFNItaly BINP Russia VNIITFRussiaLNL-INFNItaly BINP Russia VNIITFRussiaLNL-INFNItaly BINP Russia VNIITFRussiaLNL-INFNItaly BINP Russia VNIITFRussiaLNL-INFNItaly BINP Russia VNIITFRussiaLNL-INFNItaly BINP Russia VNIITFRussiaLNL-INFNItaly

＜正＞ A number of materials is considered in terms of possibility of high intense neutron target fabrication on the basis of proton *** calculations of neutron yield are presentedfor thick targets made of high temperature carbon-and boron-containing materials as well *** and results of thermo-mechanical test are presented when materials areirradiated by intense electron beam with the energy up to 5 MeV,that simulated the thermal

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