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开采天然气水合物的油藏模拟

国外油田工程 2001年第10期17卷 35-36页

作者： im J.A.m.Swinkels Rik J.J. Drenth 王艳丽大港油田集团钻采工艺研究院

分析模型不足以模拟天然气水合物储藏的开发。模型选用常规三维热油藏模拟软件模拟水合物顶气藏和天然气水合物的开发。该模型包括水合物相特性、热流和储层压实。应用油藏模拟软件可以进行实验数据的拟合、计算井的产能及评价开发方案。

关键词：油气藏开采天然气水合物油藏模拟模型产能

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开采天然气水合物的油藏模拟

石油石化节能与计量 2001年第10期 35-36页

作者： im J.A.m.Swinkels ,Rik J.J. Drenth ,王艳丽大港油田集团钻采工艺研究院

分析模型不足以模拟天然气水合物储藏的开发。模型选用常规三维热油藏模拟软件模拟水合物顶气藏和天然气水合物的开发。该模型包括水合物相特性、热流和储层压实。应用油藏模拟软件可以进行实验数据的拟合、计算井的产能及评价开发方案... 详细信息

分析模型不足以模拟天然气水合物储藏的开发。模型选用常规三维热油藏模拟软件模拟水合物顶气藏和天然气水合物的开发。该模型包括水合物相特性、热流和储层压实。应用油藏模拟软件可以进行实验数据的拟合、计算井的产能及评价开发方案。此外还可检验固态水合物层的开发方案

关键词：油气藏开采天然气水合物模拟模型产能

Luminescent polymer electrolytes based on chitosan and containing europium triflate

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Journal of Rare Earths 2016年第7期34卷 661-666页

作者： R.Alves A.S.S.de Camargo A.Pawlicka m.m.Silva Center of Chemistry University of MinhoGualtar4710-057 BragaPortugal Sao Carlos Institute of Physics University of Sao Paulo13566-590 Sao Carlos-SPBrazil Sao Carlos Institute of Chemistry University of Sao Paulo13566-590 Sao Carlos-SPBrazil

Solid polymer electrolytes based on chitosan and europium triflate were prepared by solvent casting and characterized by X-ray diffraction, scanning electron microscopy （SEm）, atomic force microscopy （AFm）, and photoluminescence spectroscopy. The X-ray diffraction exhibited that the samples were essentially amorphous with organized regions over the whole range of the salt content studied. The AFm analysis demonstrated that the smoother sample had roughness of 4.39 nm. Surface visualization through SEm revealed good homogeneity without any phase separation for more conductive samples and the less conductive showed some im- perfections on the surface. The emission and excitation spectra displayed the characteristic bands of Eu（CF3SO3）3 in addition to broad bands corresponding to the polymer host. The excited state 5D0 lifetime values ranged from 0.29-0.37 ms for the studied samples.

关键词： solid polymer electrolytes natural polymers photoluminescence spectroscopy rare earths

Distribution of Eye Diseases in Kasungu District, malawi, Central Africa—A Retrospective Cross-Sectional Study

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Advances in Infectious Diseases 2018年第2期8卷 64-69页

作者： Richard Kang Jae Jun Kim Paul Chung Gyuri Hwang Jung Sung Kim Seunghan Baek Eun Jung im George Talama The School of Public Health UC Berkeley Berkeley CA USA College of Agriculture and Life Sciences Cornell University Ithaca NY USA The Biology Department Allegheny College Meadville PA USA Korea International School Gyeonggi-do South Korea Henry m. Gunn High School Palo Alto California USA Department of Computer Science Johns Hopkins University Baltimore MD USA Classics College of Letters Arts and Sciences USC LA USA Kasungu District Hospital Kasungu Malawi

Analysis of eye diseases of patients at Kasungu District Hospital in malawi was made. malawi is one of the poorest countries in the world and the health system faces a lot challenges in terms of resources. The study was, therefore, done to understand the burden and distribution of eye diseases in this resource-limited setting. A retrospective study was conducted by extracting data from data registers in the outpatient eye department for the period of may 2015 to June 2016. The data of the reported eye diseases analyzed with variables such as patient gender, eye disease type, patient age and times of the year. There was no association between eye diseases and gender nor with times of the year. However, it was noted that the commonest type of eye disease was conjunctivitis. And, there was strong association of some disease type with age, for example, conjunctivitis was common in young age group while cataract was common in the elderly. It was shown in this study that many of the eye diseases endemic in Africa do generally occur in this selected district as well. However, the analysis presents the possibility of reducing the incidences of many diseases by preventive measures and access to health facilities on time.

关键词： Eye Diseases Kasungu District malawi

The relation between ductility at high temperature and solid solution in mg alloys

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Journal of magnesium and Alloys 2022年第1期10卷 241-256页

作者： D.F.Shi C.m.Cepeda-Jiménez m.T.Pérez-Prado im DEA materials Institute C/Eric Ka ridel228906 GetafeMadridSpain Department of materials Science Polytechnic University of Madrid/Universidad Politecnica de MadridE.T.S.de Ingenieros de Caminos28040MadridSpain Department of Physical metallurgy CENIMCSICAv.Gregorio del Amo 828040 MadridSpain

This work investigates the effect of solid solution on ductility and on the activation of individual deformation mechanisms at moderate temperatures and at quasi-static strain rates in mg-Zn and mg-Al alloys. With that aim, four solid solution mg-Zn and mg-Al binary alloy ingots containing 1 and 2 wt.% solute atoms were subjected to hot rolling and subsequent annealing to generate polycrystals with similar average grain size and basal-type texture for each composition. The activity of the different slip systems after tensile testing at 150°C and at 250°C was evaluated in pure mg and in the alloys by EBSD-assisted slip trace analysis. In addition, segregation of Zn and Al atoms at grain boundaries during the thermo-mechanical processing was characterized by HAADF-STEm and EDX. It was found that while the addition of Al and Zn atoms to pure mg does not lead to major changes in the mechanical strength at the investigated temperatures, it does enhance ductility significantly, especially at 250℃. Our results show that this increase in ductility cannot be attributed to a higher activation of non-basal systems in the alloys, as reported earlier, as the incidence of non-basal systems is indeed considerably higher in pure mg. This work suggests, on the contrary, that the ductility increase may be attributed to the presence of a more homogenous basal activity in the alloys due to a lower degree of orientation clustering, to grain boundary solute segregation, and to a higher slip diffusivity at grain interiors.

关键词： magnesium Solute segregation Slip trace analysis Ductility Deformation mechanisms

Evolution of plant reproduction:From fusion and dispersal to interaction and communication

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Chinese Science Bulletin 2009年第14期54卷 2390-2403页

作者： WILLEmSE michiel T m Laboratory of Plant Cytology and morphology Wageningen University6717LM EdeThe Netherlands

Based on the existing data concerning the evolution of the sexual reproduction, it is argued that the processes of sex differentiation and interactions play a key role in evolution. From the beginning environment and organism are unified. In a changing dynamic environment life originates and the interaction between life and environment develops from simple to more complex organisms. Sexual reproduction is introduced after the origin of meiosis and is a key process in evolution. The asexual reproduction process prepares to dispersal. Sexual reproduction process adds the genome renewal and the gamete-gamete interaction. Reproduction and dispersal are connected and the process of reproduction has similarities between asexual and sexual reproduction. Unicellular algae develop the physiological and morphological sex differentiation. Sex differentiation is connected with the way of dispersal. The step to multicellular plants introduces cell isolation after meiosis and by the stay on the mother plant within a cell or organ, plant-cell apoplastic interaction originates and by prolonged stay the plant-plant interaction. This stay influences the type of dispersal. A life cycle with alternation of generations and two moments of dispersal permits plants to go on land. In ferns a shift in the moment of sex differentiation to meiospore happens and the stay of the macrospore leads to the seed plants. In water all types of sexual reproduction, interactions and the alternation of generations are prepared and these are used to conquest land. On land the biotic dispersal is realized. The phylogeny of sexual reproduction reveals that the sex differentiation and interaction are the main causes in the evolution of sexual reproduction. Sexual reproduction shows interactions during gamete fusion, between organism and environment and in multicellular plants between organisms. With respect to other types of interaction as in symbiosis or the nutrient chain, interaction is considered as an im

关键词：基因组蕨类植物植物细胞有性生殖

The Neoarchean Ophiolite in the North China Craton:Early Precambrian Plate Tectonics and Scientific Debate

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Journal of Earth Science 2012年第3期23卷 277-284页

作者： Timothy m Kusky 翟明国 Three Gorges Research Center for Geo-hazards Ministry of EducationChina University of Geosciences State Key Laboratory of Geological Processes and mineral Resources China University of Geosciences State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences

Archean greenstone belts and their possible inclusion of fragments of ophiolites is an im-portant research subject, since it is correlated with the nature of early oceanic crust, and can yield in-formation on the nature of early planetary lithospheres, the origin of TTG （tonalite-trondhjemite-granodiorite） continental crust, the formation of early cratons and continents, and is related to when plate tectonics started in the Earth＇s evolutionary history. This article briefly reviews the North China craton＇s Archean ophiolite argument and proposes further studies aimed at understanding the genera- tion of greenstone belts and Archean ophiolites, and suggests some key scientific questions that remain to be answered.

关键词： Archean ophiolite greenstone belt North China craton.

Comparative Analysis of Quantum based Receivers with Linear and Nonlinear Adaptive Receivers

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China Communications 2007年第4期4卷 33-39页

作者： S.Sasikumar S.Karthikeyan m.Suganthi m.madheswaran P.S.N.A.College of Engineering and Technology Dindigul-624622.India Thiagarajar College of Engineering MaduraiIndia muthayammal Engineering College RasipuramIndia

In this paper,we propose a new linear multiuser receiver for synchronous code-division multiple-access (CDmA) systems,referred to as the orthogonal multiuser(OmU) *** the linear minimum mean-squared error(mmSE) receiver,the OmU receiver depends only on the signature vectors and does not require knowledge of the received amplitudes or the channel signal-to-noise ratio(SNR).Here we develop methods that construct an optimal set of vectors with a specified inner product structure,from a given set of vectors in a complex Hilbert *** optimal vectors are chosen to minimize the sum of the squared norms of the errors between the constructed vectors and the given *** algorithm has been developed using the principles of quantum parameters and some of its axioms and *** place of the classical matched filter(mF) receiver we propose a modified *** approach assumes that improving the accuracy will necessarily result in im- proved *** simulation results provided here suggests that in certain cases the OmU and POmU receivers can significantly increase the probability of correct detection with low error rate over the mF receiver.

关键词： Quantum mechanics inner product structure least square Orthogonal Orthonormal matched filter

Hepatic decompensation/serious adverse events in post-liver transplantation recipients on sofosbuvir for recurrent hepatitis C virus

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World Journal of Gastroenterology 2016年第9期22卷 2844-2854页

作者： Neal Patel Kian Bichoupan Lawrence Ku Rachana Yalamanchili Alyson Harty Donald Gardenier michel Ng David motamed Viktoriya Khaitova Nancy Bach Charissa Chang Priya Grewal meena Bansal Ritu Agarwal Lawrence Liu Gene im Jennifer Leong Leona Kim-Schluger Joseph Odin Jawad Ahmad Scott Friedman Douglas Dieterich Thomas Schiano Ponni Perumalswami Andrea Branch Division of Liver Diseases Icahn School of Medicine at Mount Sinai Recanati miller Transplant Institute Icahn School of Medicine at Mount Sinai

Aim: To determine the safety profile of new hepatitis C virus (HCV) treatments in liver transplant (LT) recipients with recurrent HCV ***: Forty-two patients were identified with recurrent HCV infection that underwent LT at least 12 mo prior to initiating treatment with a Sofosbuvir-based regimen during December 2013-June 2014. Cases were patients who experienced hepatic decompensation and/or serious adverse events (SAE) during or within one month of completing treatment. Controls had no evidence of hepatic decompensation and/or SAE. HIV-infected patients were excluded. Cumulative incidence of decompensation/SAE was calculated using the Kaplan meier method. Exact logistic regression analysis was used to identify factors associated with the composite ***: median age of the 42 patients was 60 years [Interquartile Range (IQR): 56-65 years], 33% (14/42) were female, 21% (9/42) were Hispanic, and 9% (4/42) were Black. The median time from transplant to treatment initiation was 5.4 years (IQR: 2.1-8.8 years). Thirteen patients experienced one or more episodes of hepatic decompensation and/or SAE. Anemia requiring transfusion, the most common event, occurred in 62% (8/13) patients, while 54% (7/13) decompensated. The cumulative incidence of hepatic decompensation/SAE was 31% (95%CI: 16%-41%). Risk factors for decompensation/SAE included lower pre-treatment hemoglobin (OR = 0.61 per g/dL, 95%CI: 0.40-0.88, P imated glomerular filtration rate (OR = 0.95 per mL/min per 1.73 m2, 95%CI: 0.90-0.99, P = 0.01), and higher baseline serum total bilirubin (OR = 2.43 per mg/dL, 95%CI: 1.17-8.65, P management of anemia remains an important clinical challenge.

关键词： Hepatitis C virus Sofosbuvir Ribavirin Anemia Hepatic decompensation Serious adverse event Liver transplant