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分质工具中注入聚合物表观黏度变化数学模型的建立及应用
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作者 黄斌 李晓慧 +1 位作者 傅程 王鑫 《油气藏评价与开发》 CSCD 2018年第5期48-55,共8页
针对聚合物驱油过程中油层渗透率低、层间矛盾大而导致油层动用程度较低的问题,油田现场一般采用分注工具。分注工具包括分质工具和分压工具。为系统地反映分质工具剪切作用对聚合物溶液黏度的影响,建立了分质工具中注入聚合物表观黏度... 针对聚合物驱油过程中油层渗透率低、层间矛盾大而导致油层动用程度较低的问题,油田现场一般采用分注工具。分注工具包括分质工具和分压工具。为系统地反映分质工具剪切作用对聚合物溶液黏度的影响,建立了分质工具中注入聚合物表观黏度变化数学模型,并分析了分质工具结构参数和聚合物溶液的注入量对表观黏度的影响。结果表明:聚合物溶液的表观黏度随着分质工具收缩段长度、圆柱段半径、扩张段最大直径、扩张段长度的增大而增大;随着收缩段半径的增大而减小;分质工具圆管段长度对聚合物溶液的表观黏度大小无明显影响。聚合物溶液的表观黏度随着聚合物溶液注入量的增大而减小。计算结果可为工程实际需要进行优选分质工具结构参数提供理论参考依据。 展开更多
关键词 聚合物驱 分质工具 聚合物子量 表观黏度 剪切作用
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三元复合驱分质注入工具的结构优化 被引量:4
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作者 张书进 刘崇江 +2 位作者 蔡萌 杨志刚 梁福民 《石油钻采工艺》 CAS CSCD 北大核心 2016年第1期114-117,共4页
三元复合驱分质注入工具的结构参数较多,多因素多水平的问题往往会造成结构参数难以确定。通过数值模拟和正交实验设计相结合的方法,分析了5因素4水平、共计16组的分质注入工具结构对平均应变速率和压力损失的影响;并利用极差和方差分... 三元复合驱分质注入工具的结构参数较多,多因素多水平的问题往往会造成结构参数难以确定。通过数值模拟和正交实验设计相结合的方法,分析了5因素4水平、共计16组的分质注入工具结构对平均应变速率和压力损失的影响;并利用极差和方差分析方法对影响结果进行了分析,确定出了最优分质注入工具结构参数,即扩散角尺寸1 mm、扩散角45°、圆柱段直径?4 mm、圆柱段长度2 mm、收缩段半径?10 mm。该优化研究为工具结构优化设计提供了技术指导。 展开更多
关键词 三元复合驱 注入工具 结构优化 幂律流体 数值模拟 正交实验
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Quality of life in patients with esophageal stenting for the palliation of malignant dysphagia 被引量:4
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作者 Giorgio Diamantis Marco Scarpa +4 位作者 Paolo Bocus Stefano Realdon Carlo Castoro Ermanno Ancona Giorgio Battaglia 《World Journal of Gastroenterology》 SCIE CAS CSCD 2011年第2期144-150,共7页
Diamantis G, Scarpa M, Castoro C, Ancona E and Battaglia G designed the research; Diamantis G, Scarpa M, Bocus P, Realdon S and Castoro C performed the research; Castoro C, Ancona E and Battaglia G contributed analyti... Diamantis G, Scarpa M, Castoro C, Ancona E and Battaglia G designed the research; Diamantis G, Scarpa M, Bocus P, Realdon S and Castoro C performed the research; Castoro C, Ancona E and Battaglia G contributed analytic tools; Diamantis G, Scarpa M, Bocus P, Realdon S and Castoro C analyzed the data; Diamantis G and Scarpa M wrote the paper; all authors revised and approved the final version of the manuscript. 展开更多
关键词 Esophageal cancer Health-related quality of life Self-expandable metal stents
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Stimuli-responsive Membranes: Smart Tools for Controllable Mass-transfer and Separation Processes 被引量:18
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作者 褚良银 谢锐 巨晓洁 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第6期891-903,共13页
As emerging artificial biomimetic membranes, smart or intelligent membranes that are able to respond to environmental stimuli are attracting ever-increasing interests from various fields. Their permeation properties i... As emerging artificial biomimetic membranes, smart or intelligent membranes that are able to respond to environmental stimuli are attracting ever-increasing interests from various fields. Their permeation properties including hydraulic permeability and diffusional permeability can be dramatically controlled or adjusted self-regulatively in response to small chemical and/or physical stimuli in their environments. Such environmental stimuli-responsive smart membranes could find myriad applications in numerous fields ranging from controlled release to separations. Here the trans-membrane mass-transfer and membrane separation is introduced as the beginning to initiate the requirement of smart membranes, and then bio-inspired design of environmental stimuli-responsive smart membranes and four essential elements for smart membranes are introduced and discussed. Next, smart membrane types and their applications as smart tools for controllable mass-transfer in controlled release and separations are reviewed. The research tooics in the near future are also suggested. 展开更多
关键词 smart membranes responsive membranes bio-inspired membranes gating membranes MASS-TRANSFER controlled release separation
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Port Service Quality Study of Nigerian Sea Ports
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作者 Chinedum Onyemechi Azubuike Chibuzo Amanze +1 位作者 Chinemerem Igboanusi Abiodun Sule 《Journal of Shipping and Ocean Engineering》 2017年第2期59-64,共6页
This study is focused on service quality assessment in the Nigerian ports with Westem and Eastern port zones as study areas. It discovered the level of satisfaction derived by port users by evaluating expectations and... This study is focused on service quality assessment in the Nigerian ports with Westem and Eastern port zones as study areas. It discovered the level of satisfaction derived by port users by evaluating expectations and perceptions at the ports using some selected analysis tools to test raised hypothesis. This evaluation was based on the service quality model as developed by Parasuraman within the core dimensions of Empathy, Responsiveness, Tangibles, Reliability and Assurance. The attributes of expectations and perceptions raised within these dimensions were addressed with two hypotheses. H1 (Hypothesis one) and H2 (Hypothesis two) were addressed with the results of Factor Analysis which identified the significance port users attach to service quality dimensions and their respective attributes. 展开更多
关键词 Service quality PORT EXPECTATION perception.
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Modelling and Hazard Analysis for Contaminated Sediments Using STAMP Model and STPA Tool 被引量:2
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作者 Karim Hardy Franck Guarnieri 《Journal of Energy and Power Engineering》 2013年第3期496-500,共5页
The goal of this article is dual: first, introducing a new model of accident named STAMP (systems-theoretic accident modeling and processes); then applying the model to an innovative process for the treatment of co... The goal of this article is dual: first, introducing a new model of accident named STAMP (systems-theoretic accident modeling and processes); then applying the model to an innovative process for the treatment of contaminated substances and the re-use of treated substances. This article is a demonstration for a need of a new tool to take into account hazards and safety within socio-technical systems. 展开更多
关键词 Model of accident safety engineering ENVIRONMENT contaminated substances re-use.
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Assessment of Diyarbaklr Basalt Aquifer Hydrogeological Analyzed and Obtains Thematic Maps with GIS Geostatistical Analyst Tool
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作者 Recep Celik 《Journal of Environmental Science and Engineering(A)》 2016年第2期109-115,共7页
Diyarbaklr basalt aquifer is volcanic-rock aquifers which contain high quality water. It was main resources for Diyarbaklr city center drinking supply up to 2005. Somewhere, basalt aquifer groundwater is still used fo... Diyarbaklr basalt aquifer is volcanic-rock aquifers which contain high quality water. It was main resources for Diyarbaklr city center drinking supply up to 2005. Somewhere, basalt aquifer groundwater is still used for irrigation in rural areas of Diyarbaklr city. In the study, Diyarbaklr city center's (which is located on the Tigris river basin) basalt aquifer groundwater potentials and hydrogeological features are examined and modeled by using GIS programmer. Firstly, general geological data, meteorological data and general information about natural water sources are collected together, afterwards, logs of well drilled by public institutions and private individuals within the Diyarbaklr city center are analyzed. Static water level, dynamic water level and well pumps yields are classified in these logs. Then, thematic maps produced with the help of Arc Info Professional GIS programmer with geostatistical analyst tool. Groundwater source potential of Diyarbaktr is examined by means of these thematic maps. In hydrogeological research, productivity by aquifer features, water retention capacity and groundwater level data evaluated with geological structure of area are taken into consideration. 展开更多
关键词 Diyarbaklr city center basalt aquifer GROUNDWATER groundwater static level dynamic water level pump yield efficient Geographical Information Systems (GIS).
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Development of Bioinfo-Portal Tool for the Analysis of Genomic and Proteomic Data
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作者 Rana Rehan Khalid Bilal Hussain +3 位作者 Muhammad Ali Muhammad Sajjad Ahmad Asma Haque Hira Qamar 《Journal of Life Sciences》 2012年第5期485-488,共4页
The recent explosion of biological data and the concomitant proliferation of distributed databases make it challenging for biologists and bioinformaticians to discover the best data resources for their needs, and the ... The recent explosion of biological data and the concomitant proliferation of distributed databases make it challenging for biologists and bioinformaticians to discover the best data resources for their needs, and the most efficient way to access and use them For the biologist, running bioinformatics analyses involve a time-consuming management of data and tools. Users need support to organize their work, retrieve parameters and reproduce their analyses. They also need to be able to combine their analytic tools using a safe data flow software mechanism. Finally we have designed a system, Bioinfo-Portal, to provide a flexible and usable web environment for defining and running bioinformatics analyses. It embeds simple yet powerful data management features that allow the user to reproduce analyses and to combine tools using an adobe flex tool. Bioinfo-Portal can also act as a front end to provide a unified view of already-existing collections of bioinformatics resources. Users can analyze genomic and proteomic data by using the tools that has been integrated in the portal (tools for alignments, dotplots, motif detection, domain analysis, profile searching and tertiary structure prediction). The sequences that user obtained from portal's nucleotide and protein databases are easily analyzed by the portal tools on the same interface in no time. User can also take benefit from the animations. 展开更多
关键词 Bioinfo-Portal analytic tools flexible and usable web environment tertiary structure prediction domain analysis motifdetection alignments.
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