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Petroleum Science 2024年第04期21卷 2469-2474页

作者： james j.Sheng Er-Long Yang College of Petroleum Engineering Northeast Petroleum University

During air injection into an oil reservoir, an oxidation reaction generates some heat to raise the reservoir temperature. When the reservoir temperature reaches an ignition temperature, spontaneous ignition occurs. There is a time delay from the injection to ignition. There are mixed results regarding the feasibility of spontaneous ignition in real-field projects and in laboratory experiments. No analytical model is available in the literature to estimate the oxidation time required to reach spontaneous ignition with heat *** paper discusses the feasibility of spontaneous ignition from theoretical points and experimental and field project observations. An analytical model considering heat loss is proposed. Analytical models with and without heat loss investigate the factors that affect spontaneous ignition. Based on the discussion and investigations, we find that it is more difficult for spontaneous ignition to occur in laboratory experiments than in oil reservoirs; spontaneous ignition is strongly affected by the initial reservoir temperature, oil activity, and heat loss; spontaneous ignition is only possible when the initial reservoir temperature is high, the oil oxidation rate is high, and the heat loss is low.

关键词： Spontaneous ignition Time delay Air injection Heat loss Low temperature oxidation Combustion

Outcomes following minimally invasive dorsal cheilectomy for hallux rigidus:A systematic review

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World journal of Orthopedics 2024年第6期15卷 585-592页

作者： Katherine Esser james j Butler Mackenzie Roof Nathaniel P Mercer Michael C Harrington Alan P Samsonov Andrew j Rosenbaum john G Kennedy Department of Orthopaedic Surgery University of Toledo Medical Center University of Toledo College of Medicine and Life SciencesToledoOH 43614United States Department of Orthopedic Surgery NYU Langone HealthNew YorkNY 10002United States Department of Orthopedic Surgery Albany Medical CenterAlbanyNY 12208United States

BACKGROUND Cheilectomy of the 1^(st)metatarsophalangeal joint(MTPj)is one of the most common procedures for the management of hallux ***,there is no consensus regarding outcomes following minimally invasive dorsal cheilectomy(MIDC)for the management of hallux *** To evaluate outcomes following MIDC for the management of hallux *** During November 2023,the PubMed,EMBASE and Cochrane Library databases were systematically reviewed to identify clinical studies examining outcomes following MIDC for the management of hallux *** Six studies were *** total,348 patients(370 feet)underwent MIDC for hallux rigidus at a weighted mean follow-up of 37.9±16.5 *** distribution of patients by Coughlin and Shurna's classification was recorded in 4 studies as follows:Ⅰ(58 patients,27.1%),Ⅱ(112 patients,52.3%),Ⅲ(44 patients,20.6%).Three studies performed an additional 1^(st)MTPj arthroscopy and debridement following *** intra-articular bone debris was observed in 100%of patients in 1 *** weighted mean American orthopedic foot and ankle society score improved from a preoperative score of 68.9±3.2 to a postoperative score of *** complication rate was 8.4%,the most common of which was persistent joint pain and ***-two failures(8.7%)were ***-three secondary procedures(8.9%)were performed at a weighted mean time of 8.6±3.2 months following the index *** This systematic review demonstrated improvements in subjective clinical outcomes together with a moderate complication rate following MIDC for the management of hallux rigidus at short-term follow-up.A moderate reoperation rate at short-term follow-up was *** marked heterogeneity between included studies and paucity of high quality comparative studies limits the generation of any robust conclusions.

关键词： Minimally invasive dorsal cheilectomy Hallux rigidus The first metatarsophalangeal joint Cheilectomy Minimally invasive surgery

Bayesian Deep Learning for Dynamic Power System State Prediction Considering Renewable Energy Uncertainty

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journal of Modern Power Systems and Clean Energy 2022年第4期10卷 913-922页

作者： Shiyao Zhang james j.Q.Yu Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055China Department of Computer Science and Engineering Southern University of Science and TechnologyShenzhen 518055China

Modern power systems are incorporated with distributed energy sources to be environmental-friendly and ***,due to the uncertainties of the system integrated with renewable energy sources,effective strategies need to be adopted to stabilize the entire power ***,the system operators need accurate prediction tools to forecast the dynamic system states *** this paper,we propose a Bayesian deep learning approach to predict the dynamic system state in a general power ***,the input system dataset with multiple system features requires the data pre-processing ***,we obtain the dynamic state matrix of a general power system through the Newton-Raphson power flow ***,by incorporating the state matrix with the system features,we propose a Bayesian long short-term memory(BLSTM)network to predict the dynamic system state variables *** results show that the accurate prediction can be achieved at different scales of power systems through the proposed Bayesian deep learning approach.

关键词： Bayesian deep learning data analytics NewtonRaphson power flow renewable energy source system state

Sun's Log-concavity Conjecture on the Catalan–Larcombe–French Sequence

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Acta Mathematica Sinica,English Series 2016年第5期32卷 553-558页

作者： james j.Y.ZHAO Center for Applied Mathematics Tianjin University

Let {Pn},n≥0 denote the Catalan-Larcombe-French sequence, which naturally came from the series expansion of the complete elliptic integral of the first kind. In this paper, we prove the strict log-concavity of the sequence { n√Pn}n≥1, which was originally conjectured by Z. W. Sun. We also obtain the strict log-concavity of the sequence {n√Vn}n≥1, where {Vn}n≥0 is the Fennessey-Larcombe- French sequence arising from the series expansion of the complete elliptic integral of the second kind.

关键词： The Catalan-Larcombe-French sequence the Fennessey-Larcombe-French sequence logconcavity three-term recurrence relation

Origin of high particle number concentrations reaching the St. Louis, Midwest Supersite

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journal of Environmental Sciences 2015年第8期27卷 219-231页

作者： Benjamin de Foy james j.Schauer Department of Earth and Atmospheric Sciences Saint Louis University Civil and Environmental Engineering University of Wisconsin

Ultrafine particles are associated with adverse health effects. Total Particle Number Concentration（TNC） of fine particles were measured during 2002 at the St. Louis — Midwest supersite. The time series showed overall low level with frequent large peaks. The time series was analyzed alongside criteria pollutant measurements and meteorological observations. Multiple regression analysis was used to identify further contributing factors and to determine the association of different pollutants with TNC levels. This showed the strong contribution of sulfur dioxide（SO2） and nitrogen oxides（NO x） to high TNC levels. The analysis also suggested that increased dispersion resulting from faster winds and higher mixing heights led to higher TNC levels. Overall, the results show that there were intense particle nucleation events in a SO2 rich plume reaching the site which contributed around 29% of TNC. A further 40% was associated with primary emissions from mobile sources. By separating the remaining TNC by time of day and clear sky conditions,we suggest that most likely 8% of TNC are due to regional nucleation events and 23% are associated with the general urban background.

关键词： Atmospheric aerosols Particle number concentrations Fine particles Sulfur dioxide plumes Mobile source emissions

Relations of change in fruit and vegetable intake with overall energy reduction and physical activity with weight change:Assessing theory-based psychosocial mediators

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journal of Sport and Health Science 2019年第4期8卷 394-399页

作者： james j.Annesi Wellstar School of Health and Human Service Department of Health Promotion and Physical Education Kennesaw State University Young Men’s Christian Association of Metro Atlanta

Background'.Increased physical activity and fruit and vegetable(FV)intake are typically suggested to counter *** behavior change in those areas has,however,been poor,possibly because of a lack of understanding of the effects of psychosocial *** data from previous research,this study aimed to better define the role of physical activity and FV intake in short;and long-term weight loss via changes in malleable psychosocial mediators and ***:Women who were obese(n=183;age=50.0±7.9 years;body mass index=35.2±3.2 kg/m2,mean±SD)and who previously participated in 3 different community-based behavioral weight-loss treatments were assessed over 2 *** in FV intake,physical activity,sei^regulation of physical activity and eating(aggregated),negative mood,and weight were measured over 6 and 24 ***'.Changes in each variable over both 6 and 24 months were significant(all p values<0.001).The FV intake to the weight-related caloric intake relationship(β=.0.30,p<0.001)was significantly mediated by selfregulation change over 6 *** physical activity to weightchange relationship(β=.0.46,p<0.001)was significantly mediated by both sei±regulation and mood change over 24 *** activity,itself,accounted for only 16%of weight-related caloric expenditure *** in physical activity and FV intake were each independent predictors of weight change over 24 months(overall R2=0.50,p<0.001).Conclusion-.Findings clarified theory-based targets for weight-management treatments and suggested that future weight-loss treatments strongly focus on developing self-regulatory skills to address barriers to behavioral changes.

关键词： Fruit and vegetable Obesity Physical activity Psychosocial Weight loss

Development of Water Quality Index (WQI) model for the groundwater in Tirupur district, South India

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Chinese journal Of Geochemistry 2013年第3期32卷 261-268页

作者： P.j.Sajil Kumar E.j.james Water Institute Karunya University

Groundwater quality of the Tiruppur district in Tamil Nadu was investigated in this study to develop a Water Quality Index (WQI) model. Hydrochemical parameters showed tremendous variation in certain location over the seasons. Ionic chemistry of groundwater suggested that textile industries and rock-water interaction are major threats to the water quality. Analysis of Na and Ca concentration indicates that direct as well as the inverse cation exchange controls the natural cation chemistry. NO3 concentration shows that the pre-monsoon samples were affected by the fertilizer usage in agricultural fields. Na-Cl type of the water was dominant throughout the study area except few locations. WQI showed that 55% of the pre-monsoon samples and the 47% of the post monsoon samples were classified as poor/very poor/unsuitable for drinking category. Leaching of the textile waste and their transport to the downstream was well observed during the post-monsoon season. The specific contribution of river Noyyal in the transport of the solutes to the discharge zones was proved by the hydrochemistry of the samples.

关键词：地下水模型水质指数印度水岩相互作用离子化学 O3浓度纺织废料化学样品

Mathematical applications for the management, life, and social sciences 7th ed.

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Current Status of Deltabaculoviruses, Cypoviruses and Chloriridoviruses Pathogenic for Mosquitoes

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作者： Ronald j. Harshbarger james j. Reynolds.

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中国病毒学 2007年第2期22卷 117-127页

作者： james j.Becnel Center for Medical Agricultural and Veterinary Entomology USDA/ARS 1600 S. W.23rd Drive Gainesville FL 32608 USA

There are a variety of viral pathogens that cause disease in mosquitoes with most belonging to three major groups. The most common viruses of mosquitoes are the baculoviruses (DBVs) (Baculoviridae: Deltabaculovirus), cytoplasmic polyhedrosis viruses (CPVs) (Reoviridae: Cypovirus) and the iridoviruses (MIVs) (Iridoviridae: Chloriridovirus). Baculoviruses and iridoviruses are DNA viruses while cypoviruses are the main RNA viruses in mosquitoes. This review presents an overview of the current status and recent advancements in understanding the biology and molecular features of mosquito pathogenic viruses.

关键词：杆状病毒细胞多面体病虹色病毒蚊子

Comparative study of well soaking timing(pre *** flowback)for water blockage removal from matrix-fracture interface

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Petroleum 2020年第3期6卷 286-292页

作者： Nur Wijaya james j.Sheng Bob L.Herd Department of Petroleum Engineering Texas Tech UniversityTexasUSA

Water blockage after hydraulic fracturing is one of the major challenges in shale oil recovery which affects the optimal production from the *** water blockage represents a higher water saturation near the matrixfracture interface,which decreases the hydrocarbon relative *** removal of water blockage in the field is typically carried out by soaking the well(i.e.,shut-in)after hydraulic fracturing operation is *** soaking period allows water redistribution,which decreases the water saturation near the matrix-fracture ***,previous field reports show that there is not a strong consensus on whether shut-in is beneficial in terms of production rate or ultimate oil *** to the large number of parameters involved in hydraulic fracturing and tight formations,it is challenging to select which parameter plays the dominant role in determining the shut-in ***,literature on field case studies does not frequently report the parameters which are of researchers’*** other words,the challenge of evaluating shut-in performance not only lies on the complexity of parameters and effects involved within the reservoir,but also the limited number of field case studies which report a comprehensive list of fracturing and reservoir *** paper aims to investigate the effect of well soaking timing on shut-in *** idea to investigate the shut-in timing effect is motivated by the fact that in the field,shut-in can take place either immediately after hydraulic fracturing but before the first flowback(i.e.,pre-flowback)or sometime after the first flowback(i.e.,post-flowback).The timing of shut-in is believed to influence the production performance,because it dictates how much water is allowed to imbibe from the fractures to the matrix before the extended production.A numerical model is built and validated by a successful history match with numerous data from core-flood *** previous s

关键词： Water blockage Formation damage Flowback Shut-in Desiccation