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CURRENT COLLOIDAL DISPERSION GELS ARE NOT SUPERIOR TO POLYMER FLOODING

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大庆石油地质与开发 2006年第5期25卷 71-80页

作者： seright randy Han Peihui Wang Dongmei . New Mexico Tech USA Exploration and Development Research Institute of Daqing Oil Field Company Ltd. PetroChina

The suggestion that the colloidal-dispersion-gel (CDG) process is superior to normal polymer flooding is misleading and generally incorrect. Colloidal dispersion gels, in their present state of technological development, should not be advocated as an improvement to, or substitute for, polymer flooding. Gels made from aluminum-citrate crosslinked polyacrylamides can act as conventional gels and provide effective conformance improvement in treating some types of excess water production problems if sound scientific and engineering principles are respected.

关键词： Colloidal-dispersion-gel(CDG) Polymer flooding Controversy

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聚驱过程中裂缝产生的可能性研究

大庆石油地质与开发 2007年第5期26卷 102-105页

作者：王冬梅韩大匡高淑玲李颖 randy seright 中国石油勘探开发研究院大庆油田有限责任公司勘探开发研究院 PRRC NM U.S.A.87801

通过数值模拟和室内岩心驱替实验,结合现场实际数据,认为在所研究的地质特征范围内,某些注采井间的确产生了微小的裂缝。在聚合物注入期间,裂缝宽度变化范围为1.4mm到5.0 mm.而在聚合物注入后的后续水驱阶段,所得到的裂缝宽度缩小为0到1... 详细信息

通过数值模拟和室内岩心驱替实验,结合现场实际数据,认为在所研究的地质特征范围内,某些注采井间的确产生了微小的裂缝。在聚合物注入期间,裂缝宽度变化范围为1.4mm到5.0 mm.而在聚合物注入后的后续水驱阶段,所得到的裂缝宽度缩小为0到1.8 mm。结论认为,近井地带的裂缝有利于改善油藏的波及效率。在聚合物溶液注入期间,这些裂缝可以有效增加注入指数,同时增加生产井的采油指数并缓解聚合物的机械降解。

关键词：裂缝窜流聚合物驱注入指数生产指数

Transforming nanoscale VO_(2)(B) into a scalable sodium-ion electrode

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Nano Research 2024年第10期17卷 8809-8818页

作者： Yunkai Luo Swetha Chandrasekaran Bintao Hu randy Chen Marcus Worsley Bruce Dunn Department of Materials Science and Engineering University of CaliforniaLos AngelesCA 90095USA Lawrence Livermore National Laboratory CA 94550USA

The intermittent nature of renewable energies requires highly reliable grid-level energy storage approaches.A critical consideration in developing this technology is the areal capacity which determines battery performance and influences the cost of battery *** related importance is finding new ways of developing scalable *** recent years,threedimensional(3D)printing of conductive scaffolds has emerged as an alternative to overcome the scalability limitations of commercial tape cast *** research carried out in the current study demonstrates a successful scalability pathway for nanoscale VO_(2)(B),a desirable cathode for sodium-ion batteries which has a nano-flower morphology with a crystallite size<20 *** electrodepositing VO_(2)(B)onto a graphene aerogel scaffold,we were able to achieve mass loading of over 100 mg·cm^(-2) and still possess an areal capacity of 10 mAh·cm^(-2) at a current density of 5 mA·cm^(-2).Moreover,after 1000 cycles,these electrodes retained 75% to 80% of their initial *** at high loading levels,the electrodeposited VO_(2)(B)exhibits pseudocapacitive material signatures such as a box-like voltammetry response,linear galvanostatic response,and no phase change upon *** scalability of the VO_(2)(B)electrode is demonstrated in a series of experiments which show the areal capacity to scale upon increase in both mass loading and electrode thickness,with only small changes in specific *** study establishes that nanoscale materials can be scaled up to achieve thick electrodes without compromising their electrochemical properties.

关键词： nano VO_(2)(B) sodium-ion battery scalable electrodes three-dimensional(3D)printed scaffold additive manufacturing

Non-Linear Matrix Completion

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Journal of Data Analysis and Information Processing 2024年第1期12卷 115-137页

作者： Fengrui Zhang randy C. Paffenroth David Worth Worcester Polytechnic Institute Worcester MA USA

Current methods for predicting missing values in datasets often rely on simplistic approaches such as taking median value of attributes, limiting their applicability. Real-world observations can be diverse, taking stock price as example, ranging from prices post-IPO to values before a company’s collapse, or instances where certain data points are missing due to stock suspension. In this paper, we propose a novel approach using Nonlinear Matrix Completion (NIMC) and Deep Matrix Completion (DIMC) to predict associations, and conduct experiment on financial data between dates and stocks. Our method leverages various types of stock observations to capture latent factors explaining the observed date-stock associations. Notably, our approach is nonlinear, making it suitable for datasets with nonlinear structures, such as the Russell 3000. Unlike traditional methods that may suffer from information loss, NIMC and DIMC maintain nearly complete information, especially in high-dimensional parameters. We compared our approach with state-of-the-art linear methods, including Inductive Matrix Completion, Nonlinear Inductive Matrix Completion, and Deep Inductive Matrix Completion. Our findings show that the nonlinear matrix completion method is particularly effective for handling nonlinear structured data, as exemplified by the Russell 3000. Additionally, we validate the information loss of the three methods across different dimensionalities.

关键词： Matrix Completion Data Pipeline Machine Learning

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加拿大央行打响了背离美联储的第一枪

商业周刊（中文版） 2024年第9期 20-22页

作者： Erik Hertzberg randy Thanthong-Knight Jay Zhao-Murray 杨(译) 不详

加拿大央行行长蒂夫·麦克勒姆明确表示,尽管加元可能面临下行压力,但加拿大的利率政策不需要与美国亦步亦趋。加拿大央行行长蒂夫·麦克勒姆(Tiff Macklem)率先在七国集团(G-7)中降息,他对这一举措的信心,或有助于让其他央行放下心来,... 详细信息

加拿大央行行长蒂夫·麦克勒姆明确表示,尽管加元可能面临下行压力,但加拿大的利率政策不需要与美国亦步亦趋。加拿大央行行长蒂夫·麦克勒姆(Tiff Macklem)率先在七国集团(G-7)中降息,他对这一举措的信心,或有助于让其他央行放下心来,他们也可以在美联储之前降息。

关键词：七国集团克勒姆降息利率政策央行第一枪美联储加拿大

Empowering Rice Farmers in Nueva Ecija, Philippines: A Strategic Approach to Boosting Income through Special Purpose Rice Production

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Open Journal of Ecology 2024年第3期14卷 199-214页

作者： Armando C. Lagasca Eugenia G. Baltazar Johnah Jefferson S. Mercado randy L. Kwan Erwin M. Valiente Jerski Jarzen C. Duria University Extension Program Office Central Luzon State University Science City of Mu&#241oz Philippines Department of Agri-Management College of Agriculture Central Luzon State University Science City of Mu&#241oz Philippines Department of Social Science College of Arts and Social Sciences Central Luzon State University Science City of Mu&#241oz Philippines

Low income is the main problem of millions of farmers who are cultivating 4.81 million hectares in the Philippines. This problem is attributed to challenges specifically low yield, low quality of produce, and significant post-harvest losses, particularly in a resource-scarce setting. This study aimed to help increase the farmers’ income in selected towns of Nueva Ecija through the promotion and use of special purpose rice production technology. Twenty (20) farmer-cooperators in three towns of Nueva Ecija were selected to demonstrate the production technology covering a total area of 4.75 hectares during the dry season, and 3.3 hectares during the wet season, both in 2023. Extension modalities such as training, techno-demo establishment, information material and technical assistance provision, and market linkage were undertaken to enhance their knowledge, attitude, and skills on special rice production and enterprise. The study utilized the descriptive quantitative method wherein the data were gathered through surveys, specifically personal interviews. Results showed that 70% of the farmer-cooperators were male and 60% were living below the poverty threshold. The farmers were 53 years old on average and engaged in farming as their primary source of income. The average yield of special purpose rice particularly the CLS-2 variety was higher (6.46 MT/ha and 6.22 MT/ha during dry and wet seasons, respectively) than that of inbred or non-special rice. The income per hectare from special purpose rice production per hectare was Php 75,420.00, which is higher than that of regular rice at Php 29,389.00, giving a higher benefit of Php 46,031.00. The technology adopters and area planted increased (from 6 to 9 and from 1.4 hectares to 2.75 hectares, respectively) in Licab, Nueva Ecija. The opposite was true in Sto. Domingo and Guimba, Nueva Ecija where farmers were discouraged by the marketing issues that arose.

关键词： Special Purpose Rice Technology Promotion Extension Modality

Hippo signaling and epithelial cell plasticity in mammalian liver development, homeostasis, injury and disease

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Science China(Life Sciences) 2019年第12期62卷 1609-1616页

作者： randy L.Johnson Department of Cancer Biology University of Texas MD Anderson Cancer Center

A traditional view of cellular differentiation is unidirectional: progenitor cells adopt specific fates in response to environmental cues resulting in deployment of cell-specific gene expression programs and acquisition of unique differentiated cellular properties such as production of structural and functional proteins that define individual cell types. In both development and in tissue repair stem and progenitor cells are thought to both self-renew to maintain the pool of precursors and to expand to give rise to transient amplifying and differentiated cell types. Recently, however, it has become appreciated that differentiated cell types can be reprogrammed to adopt progenitor and stem cell properties. In the case of epithelial cells in the mammalian liver, hepatocytes and biliary epithelial cells there is a significant degree of plasticity between these lineages that has been implicated in mechanisms of tissue repair and in liver pathologies such as cancer. Recent studies have highlighted the role of Hippo signaling, an emerging growth control and tumor suppressor pathway, in regulating epithelial cell plasticity in the mammalian liver and in this review, the role of cellular plasticity and Hippo signaling in regulating normal and abnormal tissue responses in the mammalian liver will be discussed.

关键词： liver homeostasis plasticity regeneration cancer Hippo pathway

Lateral line system of fish

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Integrative Zoology 2009年第1期4卷 13-25页

作者： Horst BLECKMANN randy ZELICK Institute of Zoology University of BonnBonnGermany Department of Biology Portland State UniversityPortlandUSA

The lateral line is a sensory system that allows fishes to detect weak water motions and pressure *** smallest functional unit of the lateral line is the neuromast,a sensory structure that consists of a hair cell epithelium and a cupula that connects the ciliary bundles of the hair cells with the water surrounding the *** lateral line of most fishes consists of hundreds of superficial neuromasts spread over the head,trunk and tail *** addition,many fish have neuromasts embedded in lateral line canals that open to the environment through a series of *** present paper reviews some more recent aspects of the morphology,behavioral relevance and physiology of the fish lateral *** addition,it reports some new findings with regard to the coding of bulk water flow.

关键词： central integration hydrodynamic reception lateral line object localization teleost fish.

Efficient Haplotype Inference Algorithms in One Whole Genome Scan for Pedigree Data with Non-genotyped Founders

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Acta Mathematicae Applicatae Sinica 2009年第3期25卷 477-488页

作者： Hadi Sabaa randy Goebel Department of Computing Science University of Alberta

An efficient rule-based algorithm is presented for haplotype inference from general pedigree genotype data, with the assumption of no recombination. This algorithm generalizes previous algorithms to handle the cases where some pedigree founders are not genotyped, provided that for each nuclear family at least one parent is genotyped and each non-genotyped founder appears in exactly one nuclear family. The importance of this generalization lies in that such cases frequently happen in real data, because some founders may have passed away and their genotype data can no longer be collected. The algorithm runs in O（m^3n^3） time, where m is the number of single nucleotide polymorphism （SNP） loci under consideration and n is the number of genotyped members in the pedigree. This zero-recombination haplotyping algorithm is extended to a maximum parsimoniously haplotyping algorithm in one whole genome scan to minimize the total number of breakpoint sites, or equivalently, the number of maximal zero-recombination chromosomal regions. We show that such a whole genome scan haplotyping algorithm can be implemented in O（m^3n^3） time in a novel incremental fashion, here m denotes the total number of SNP loci along the chromosome.

关键词： Haplotype inference efficient algorithm pedigree whole genome scan