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289篇 您的检索式:作者名="P.C."
    题名 作者 年代 出处 被引量
1肛周Crohn病:评估动态增强MR成像作为疾病活动性指标显示文摘目的前瞻性研究动态增强MR成像评估肛周Crohn病活动性的临床价值。方法病人签署了知情同意书,机构审查委员会放弃了批准。33例肛周Crohn病病人进行盆腔MRI检查,其中男性17例[平均年龄(37.4±10.8)岁,范围18~54岁],女性16例[平均年龄(32.0±8.3)岁,范同16±43岁]。每例均行动态增强MRI检查,获得时间信号强度曲线。按预先设定的6种类型时间信号强度曲线对每一个像素进行分类。每次MRI检查均在病变范围最大、信号最高层面上沿窦道描画兴趣区,计算最大强化值、强化斜率和时间信号强度曲线类型。K. Horsthuis C. Lavini S. Bipat P.C. Stokkers J. Stoker. 龙淼淼(译) 季倩(校) 2009国际医学放射学杂志2009,32,4:10
2难浸金矿的生物氧化──Genmin的经验显示文摘简敏(Genmin)公司20余年致力于应用生物氧化回收难浸砷黄铁矿石中金的研究和开发,终于使该工艺取得中间试验成功,并最终被费尔尤(Fairview)矿一示范厂所采用。简敏公司的生物氧化(BIOX)工艺证明,细菌可成功地应用于难浸矿石中硫和砷的氧化以暴露和有效地回收金.BIOX工艺现已用在费尔尤矿、圣本托(SaoBento)矿和汉堡赖茨(HarbourLights),威卢纳(Wiluna)矿也正在采用。P.C.范.阿斯韦根 魏以和 1996国外金属矿选矿1996,33,1:9
3用生物氧化法改进难选金矿石的处理显示文摘处理难选金矿生物氧化法已于 1 988年商业化了。最近 1 0年来 ,生物氧化法已发展成为一个成熟的商业上可行的工艺 ,已在 5个矿山得到应用 :巴西的圣本托、澳大利亚的哈伯拉特、澳大利亚的威卢纳、加纳的阿散蒂和秘鲁的塔姆博拉奎。该法目前正在研究之中 ,其效率和经济效益均得到改善 ,用它代替常规的处理难选金的方法 (如焙烧和加压氧化 )具有很大的吸引力。细菌的培养很旺盛 ,能经受住操作厂试验条件的正常波动。生物氧化厂操作简单 ,适用于边远的地区。该法按比例放大的潜力已得到证实 ,它可用于处理大的难选矿体。该工艺对环境影响小。选矿溢流中和可产生能满足最严格的环境法规的沉淀。P.C.范阿斯维根 宋峻 黎孜 2000国外金属矿选矿2000,37,6:7
4人与自然的共同进化问题显示文摘“共同进化”这一概念强调生物界和社会在最大范围内的相互渗透、相互交织和相互补充,这无疑是个很有用的概念。它把研究者的思想引向探讨许多尚未解决的问题。关于生物进化和文化进化的相互作用的观念,已由维尔纳茨基在他的生物圈及智力圈(由理性支配的生物圈)学说中,成功地加以发展。共同进化思想正被用在进化论生物学家和生态学家的许多现代著作中,被用在“社会—自然界”相互关系问题研究中,也被用于制订生物圈发展的计算机控制模式。在具体的科学层次上。P.C.卡尔宾斯卡娅 亦舟 1989国外社会科学1989,,4:6
5块段模型和线框模型在地下采矿中的应用显示文摘矿物工业计算公司(MICL—Mineral Industries Computing Ltd.)现在新开发的一个软件,采用了体积(块段)和边界(线框)[boundary(wireftame)]两种模型,并具有综合来自这两种模型的信息的功能。这两种模型方法虽然很不相同,但却是互为补充的:由立方块体组成的(块段)模型能够处理与空问体积相关的数据,但不适于进行表面的描述;而线框模型基本上是表面模型,不便于在封闭体积内建立详细的变量模型。在一个综合的采矿软件包的整体结构中,这两种模型方法的结合,在地下矿山计划方面有很多用途。A.J.惠勒 P.C.斯托克斯 侯运炳 1989国外金属矿山1989,,2:5
6The interaction between membrane structure and wind based on the discontinuous boundary element显示文摘Small disturbance potential theory is widely used in solving aerodynamic problems with low Mach numbers, and it plays an important role in engineering design. Concerning structure wind engineering, the body of the structure is in a low velocity wind field, with a low viscosity of air and thin boundary layer, therefore, the tiny shear stress caused by the boundary layer can be ignored, only wind pressure being considered. In this paper, based on small disturbance potential theory, the fluid-structure interaction between the wind and membrane structure is analyzed by joint utilization of the boundary element method (BEM) and finite element method (FEM) through a loose-coupling procedure. However, the boundary of flow field to be calculated is not fully smooth, corners and edges still exist, so the discontinuous boundary element is introduced. Furthermore, because a large scale boundary element equation set with a nonsymmetrical coefficient matrix must be solved, this paper imports a preconditioning GMRES (the generalized minimum residual) iterative algorithm, which takes full advantage of the boundary element method. Several calculation examples have verified the correctness and soundness of the treatments mentioned above.LI Ya &YE JiHong Key Laboratory of R.C. & P.C. Structures of Ministry of Education, Southeast University, Nanjing 210096, China 2010Science China(Technological Sciences)2010,53,2:5
7Laparoscopic approach of surgical treatment for primary hepatolithiasis: a cohort study显示文摘Eric C.H. Lai Tang Chung Ngai George P.C. Yang Michael K.W. Li 2010The American Journal of Surgery2010,,5:4
8Robot-assisted laparoscopic liver resection for hepatocellular carcinoma: short-term outcome显示文摘Eric C.H. Lai George P.C. Yang Chung Ngai Tang 2013The American Journal of Surgery2013,,6:3
9Study on kinetics of thermal decomposition of low LOI goethetic hematite iron ore显示文摘In the present study, the kinetics of thermal decomposition of hydrated minerals associated in natural hematite iron ores has been investigated in a fixed bed system using isothermal methods of kinetic analysis. Hydrated minerals in these hematite iron ores are kaolinite, gibbsite and goethite, which contribute to the loss on ignition(LOI) during thermal decomposition. Experiments in fixed bed have been carried out at variable bed depth(16, 32, 48 and 64 mm),temperature(400-1200 ℃) and residence time(30,45, 60 and 75 min) for iron ore samples. It is observed that beyond a certain critical bed depth(16 mm), 100% removal of LOI is not found possible even at higher temperature and higher residence time. Most of the solid-state reactions of isothermal kinetic analysis have been used to analyze the reaction mechanism. The raw data are modified to yield fraction reacted 'α' versus time and used for developing various forms of 'α' functions.f(α) is the inverse of first derivative of g(α) with respect to α. The study demonstrates that decomposition of hydrated mineral in hematite follows the chemical kinetics.The estimated activation energy values in all the experimental situations are found to high, of the order of 60 kJ/mol, reinstating that the reactions are indeed controlled by moving phase boundary and random nucleation.Beuria P.C. Biswal S.K. Mishra B.K. Roy G.G. 2017International Journal of Mining Science and Technology2017,27,6:3
10Short term soil priming effects and the mineralisation of biochar following its incorporation to soils of different pH显示文摘Y. Luo M. Durenkamp M. De Nobili Q. Lin P.C. Brookes 2011Soil Biology and Biochemistry2011,,11:3
11Nipple sparing mastectomy: Can we predict the factors predisposing to necrosis?显示文摘Z.K. Algaithy J.Y. Petit V. Lohsiriwat P. Maisonneuve P.C. Rey N. Baros H. Lai P. Mulas D.M. Barbalho P. Veronesi M. Rietjens 2011European Journal of Surgical Oncology2011,,2:3
12Development of Low Carbon Microalloyed High Strength Ultra-Thin Cast Strip Products Produced by the Castrip~ Process With Excellent Strength-Ductility Properties显示文摘The CASTRIP* process produces a range of high strength Ultra-thin Cast Strip (UCS) products (380-550 MPa) in thicknesses between 0.9 mm and 1.5 mm, which is very challenging to produce via conventional hot and cold rolled processing routes. The twin roll CASTRIP process fully exploits the hardenability and strengthening potential of Nb in a low C-Mn-Nb-V microalloyed steel type. Significant microstructural strengthening from solute Nb was obtained, even at low microalloying levels, as well as modest Mn additions, through enhancing the hardenability and further strengthening was obtained in coated products by exploiting age hardening during processing on a continuous hot dip galvanising line. Atom probe tomography and TEM determined that Nb was retained in solid solution and subsequent age hardening resulted from the formation of Nb and V rich nanosized particles. Age hardening was achieved without loss of ductility producing galvanised strip with an excellent strength-ductility combination (Y.S. >600 MPa, T.E. >10%).C.R. Killmore K.R. Carpenter H.R. Kaul D.G. Edelman J.M. Cairney S.P. Ringer J.G. Williams P.C. Campbell W.N. Blejde 2011Journal of Iron and Steel Research(International)2011,18,S1:3
13Functional Disabilities Profile of Chinese Elderly People with Alzheimer's Disease - A Validation Study on the Chinese Version of the Disability Assessment for Dementia显示文摘Cycbie C.M. Mok Andrew M.H. Siu W.C. Chan K.M. Yeung P.C. Pan Siu-wah Li 2005中国生物学文摘2005,19,11:3
14Robot-assisted laparoscopic pancreaticoduodenectomy versus open pancreaticoduodenectomy – A comparative study显示文摘Eric C.H. Lai George P.C. Yang Chung Ngai Tang 2012International Journal of Surgery2012,,9:2
15Dust accumulation and leaf pigment content in vegetation near the national highway at Sambalpur, Orissa, India显示文摘B.A.K. Prusty P.C. Mishra P.A. Azeez 2004Ecotoxicology and Environmental Safety2004,,2:2
16Trends in Antibacterial Susceptibility of Mastitis Pathogens During a Seven-Year Period显示文摘R.J. Erskine R.D. Walker C.A. Bolin P.C. Bartlett D.G. White 2002Journal of Dairy Science2002,,5:2
17人类学传统实地调查过时了吗?显示文摘民族志实地调查是社会文化人类学与其他社会科学相区别的重要特征,也是一个人由人类学学生向人类学家转变的标志。我们中的绝大多数人都曾做过以下这些事情:下决心做好一切准备,装点好旅行包,带着对实地调查的各种迷离扑朔的揣测,怀着那些尚未成熟但自己却已企望过甚的研究设想,出发到蛮荒之地去为人类学的神圣目标、为了解另一种通常不为人知的文化作一番单枪匹马的探索(solitary quests)。这种调查方式被冠以一个不说神秘至少也很特别的名称——“参与观察”,意指通过长期的共居生活,沉浸到另一民族社会中去。但这一名称还意味着什么,人们并不明确,尤其我们当中那些未受过实地调查训练的人更是如此。P.C.萨尔兹曼 杨晓 1989世界民族1989,,3:2
18Developing a risk assessment model for PPP projects in China — A fuzzy synthetic evaluation approach显示文摘Yelin Xu John F.Y. Yeung Albert P.C. Chan Daniel W.M. Chan Shou Qing Wang Yongjian Ke 2010Automation in Construction2010,,7:2
19中性粒细胞CD64是新生儿早期感染的敏感诊断标志Ng P.C. 阿明 2005世界核心医学期刊文摘(儿科学分册)2005,0,3:2
20土壤整段标本的制备显示文摘序言本文简要介绍了野外采集土壤整段标本的方法和室内制备技术。这套程序经众多的科技工作者改进后,正逐步趋于完善。对于准备陈列土壤整段标本的人来说,它已成为实践指南。野外采集出发之前,先准备好合适的标本盒。标本盒务必坚固。P.C.格伯 任建煌 1988古今农业1988,,1:2
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