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Search Results: 1 - 10 of 24522 matches for " Jie Tan "
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Two applications of generalized Carleson measures to meromorphic Besov-type spaces
Haiou Tan,Jie Xiao
Chinese Science Bulletin , 1998, DOI: 10.1007/BF02884137
Abstract: The generalized Carleson measures are used to characterize the rnerornorphic Besov-type spaces and to explore some inclusions between these spaces.
Design and research of measuring system of clamping force of hemostats  [PDF]
Huifang Wang, Shuyi Wang, Ying Zhou, Jie Tan
Journal of Biomedical Science and Engineering (JBiSE) , 2010, DOI: 10.4236/jbise.2010.39123
Abstract: Reliability of medical instruments such as hemostats is extremely important because these instruments are used in patients who are in critical condition. Clamping force of hemostats, as an important parameter of hemostats, should be detected. However, it could not be tested directly. In order to test it, a testing system has been put forward. The system is comprised of sensor, acquisition card, and three-way tap and so on. This system is controlled by a computer. The testing system has been proved to be effective in testing the clamping force of hemostats.
Adjustment of Liquid Production in Reservoir with Handling Capacity Constraints  [PDF]
Jie Tan, Dong Zhang, Dongdong Yang, Songru Mou, Qin Peng
Journal of Geoscience and Environment Protection (GEP) , 2019, DOI: 10.4236/gep.2019.74002
Abstract: A oilfield was an oil reservoir with strong bottom water in offshore, the water cut was as high as 96%. In the high water cut stage, the most effective way of increasing oil production was to extract liquid and increase oil. The processing capacity of oilfield fluid was limited by the conditions. By using Petrel-RE-2017 software, combining reservoir engineering and percolation mechanics methods, this paper analyzes the effect of large-scale liquid pumping, expand coverage and shut-in coning in oil reservoirs with bottom water, and formulates the adjustment strategy of single well production structure of the whole oilfield. It was confirmed that large-scale liquid production can expand coverage and shutting down well can reduce water cut. It can provide reference and guidance for oil field with strong bottom water when it encounters bottleneck of liquid treatment capacity.
The Residual Potential of Bottom Water Reservoir Based upon Genetic Algorithm for the Relative Permeability Inversion  [PDF]
Dong Zhang, Jie Tan, Dongdong Yang, Songru Mu, Qin Peng
Journal of Geoscience and Environment Protection (GEP) , 2019, DOI: 10.4236/gep.2019.74012
Abstract: X oilfield has successfully adopted horizontal wells to develop strong bottom water reservoirs, as a typical representative of development styles in the Bohai offshore oilfield. At present, many contributions to methods of inverting relative permeability curve and forecasting residual recoverable reserves had been made by investigators, but rarely involved in horizontal wells’ in bottom water reservoir. As the pore volume injected was less (usually under 30 PV), the relative permeability curve endpoint had become a serious distortion. That caused a certain deviation in forecasting residual recoverable reserves in the practical value of field directly. For the performance of water cresting, the common method existed some problems, such as no pertinence, ineffectiveness and less affecting factors considered. This paper adopts the streamlines theory with two phases flowing to solve that. Meanwhile, based on the research coupling genetic algorithm, optimized relative permeability curve was calculated by bottom-water drive model. The residual oil saturation calculated was lower than the initial’s, and the hydrophilic property was more reinforced, due to improving the pore volume injected vastly. Also, the study finally helped us enhance residual recoverable reserves degree at high water cut stage, more than 20%, taking Guantao sandstone as an example. As oil field being gradually entering high water cut stage, this method had a great significance to evaluate the development effect and guide the potential of the reservoir.
Fine Characterization Method for Interlayers in Complex Meander River Sandstone Reservoir: A Case Study of Um7 Sand of C Oilfield in Bohai Bay Area  [PDF]
Jingmin Guo, Wei Wang, Jie Tan, Qin Peng, Dong Zhang
International Journal of Geosciences (IJG) , 2019, DOI: 10.4236/ijg.2019.104023
Abstract: Taking the Um7 meandering river complex sandstone reservoir of Bohai Bay C oilfield as an example, the interlayer type is defined according to the interlayer lithology and sedimentary genesis, and the identification mode of different types of interlayer is established, and the interlayer comparison of the whole area is carried out by using this mode. The results show that the interlayer can be further defined as the stable distributed interlayer and the randomly distributed interlayer according to the morphology of the interlayer. The distribution characteristics of the two types of interlayers are characterized by the well-to-well comparison method and the data analysis method, and the three-dimensional characterization is carried out. The results more closely reflect the spatial distribution of the interlayer, but also are closer to the underground real situation.
Study on Productivity Model of Herringbone-Like Laterals Wells and Optimization of Morphological Parameters Considering Threshold Pressure Gradient in Heavy Oil Reservoirs  [PDF]
Enhui Sun, Jie Tan, Dong Zhang, Wei Wang, Songru Mu
World Journal of Engineering and Technology (WJET) , 2019, DOI: 10.4236/wjet.2019.72021
Abstract: Compared with conventional well, herringbone-like laterals wells can increase the area of oil release, and can reduce the number of wellhead slots of platforms,?and?also can greatly improve the development efficiency. Based on threshold pressure gradient in heavy oil reservoir,?and?the applied principle of mirror reflection and superposition, the pressure distribution equation of herringbone-like laterals wells is obtained in heavy oil reservoir. Productivity model of herringbone-like laterals wells is proposed by reservoir-wellbore steady seepage. The example shows that the productivity model is great accuracy?to?predict the productivity of herringbone-like laterals wells. The model is used to analyze the branching length, branching angle, branching symmetry, branching position and spacing and their effects on productivity of herringbone-like laterals wells. The principle of optimizing the well shape of herringbone-like laterals wells is proposed.
Interlayer Prediction Method for Braid River Reservoirs in Offshore Oil Field  [PDF]
Wei Wang, Peng Meng, Jie Tan, Dongdong Yang, Dong Zhang
Open Journal of Geology (OJG) , 2019, DOI: 10.4236/ojg.2019.95017
Abstract: The interlayer structure of braid river reservoirs is complex and the interwell prediction is difficult in offshore oil field. Taking CFD11-1 oilfield of NgⅢ sand as an example, based on layer contrasting, the interlayer is divided into muddy interlayer, clay boulder interlayer, and physical interlayer according to lithology. Under the guidance of sedimentary model, we use the geology statistical inversion method to predict the clay boulder interlayer, consistent with the dynamic characteristics of oil production which is used for the prior quality control. The results of this study can objectively reveal the characteristics of interlayer space distribution. Compared with the traditional multi-well comparison and stochastic simulation model, this method is applied to the offshore oil field which is character with wide well space, sparse well network, which has very high application value in predicting the interlayer and deploying of inter-well encryption in the similar oilfield.
Smoking Cause Specific Lung Cancer—Evidence from Non-Smoking Lung Adenocarcinoma  [PDF]
Ning Li, Bin Qu, Kang Shao, Zhaoli Chen, Fengwei Tan, Xiaogang Tan, Baozhong Li, Jiwen Wang, Jie He
Journal of Cancer Therapy (JCT) , 2012, DOI: 10.4236/jct.2012.324056
Abstract: Introduction: Smoking and non-smoking lung cancer have many differences in clinical feature. But those may be the result of interference due to differences in pathological type, as most smoking patients suffer squmous cell lung cancer and non-smokings tend to get adenocarcinoma. This study was conducted on the specific histological type-lung adenocarcinoma-to avoid histological bias and to reveal the true effect of smoking. Methods: A total of 2222 patients with lung adenocarcinoma confirmed by histological or cytological evidence were enrolled from January 1, 1999 to December 31, 2004. Differences in clinical features and prognosis between non-smoking and smoking patients were analyzed.Chisquare test was used for univariate comparisons. Univariate probability of survival was computed using Kaplan-Meier estimate and compared to using the log-rank test. Cox proportional hazards regression analysis was used to evaluate the risk of death. Results: There were 777 current smokers (34.96%), 197 former smokers (8.87%) and 1248 non-smoking patients (56.17%). 860 non-smoking patients (68.91%) were female, compared with 6.31% among current smokers and 4.06% among former smokers (p < 0.001). Non-smoking patients had an earlier age at diagnosis (p < 0.001) and a better response to chemotherapy (p < 0.001) compared to current smoking patients. Current smoking correlated with lower cell differentiation (p < 0.001) and worse prognosis (p = 0.0024). After multivariate analysis, smoking was identified as an independent negative prognostic factor (HR, 1.302; 95% CI, 1.011 - 1.6780, p = 0.041). No difference in prognosis was observed according to smoking conditions in smoking patients. Conclusions: Significent differences exist in clinical features and prognosis between non-smoking and smoking lung adenocarcinoma patients. There is a strong evidence that non-smoking lung adenocarcinoma should be regard as different disease.
Tetraaquabis[1-(3-carboxyphenyl)-4,4′-bipyridin-1-ium-κN1′]zinc bis(4,5-carboxybenzene-1,2-dicarboxylate) 2.5-hydrate
Jie Zhang,Yi Tan,Zhiyong Fu
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811045156
Abstract: In the complex cation of the title compound, [Zn(C17H13N2O2)2(H2O)4](C10H4O8)2·2.5H2O, the ZnII atom, lying on an inversion center, is coordinated by two N atoms from two N-(3-carboxyphenyl)-4,4′-bipyridin-1-ium ligands and four water molecules in a distorted octahedral geometry. The pyromellitate anion is double deprotonated. O—H...O and C—H...O hydrogen bonds connect the cations, anions and uncoordinated water molecules into a three-dimensional supramolecular network. One of the two lattice water molecules shows an occupancy of 0.25. An intramolecular O—H...O hydrogen bond is present in the anion.
Land Policy and Systematic Transformation in Chinese Rural Areas(1950—1978)
Rong TAN,Huake GAO,Jie CUI
Canadian Social Science , 2009,
Abstract: Based on historical review of the Chinese rural land policy from 1950 to 1978, we looked back the devious journey undergone in Chinese rural areas during this period. At first, the landlord’s ownership was transferred into the peasant’s ownership; and then private ownership was transferred into public ownership. The radical transformation of property right and process of agricultural cooperation went against the economic law and the wills of the mass peasants, which led to laggard rural productive forces and long-term low peasants’ income level. During the policy transformation process, political and ideological factors played the predominant role, which led to harmful results. The experiences in this period demonstrated that the economic developmental model and systematic arrangement in Chinese rural areas should satisfy the peasants’ free wills and protect the peasants’ essential interests. Only in this way could the Chinese rural economy gain fast development. Key Words: Chinese Rural Areas, Land Policy, System Arrangement, Ideology, Interests Abstrait: Basés sur une révision historique de la politique de terre dans les régions rurales de Chine de 1950 à 1978, nous avons mené un examen rétrospectif sur le parcours détourné qu’avaient traversé ces régions pendant cette période. Au début, les terres des propriétaires fonciers avaient été transférées comme propriétés des paysans ; et puis, les propriétés privées avaient été transféré comme propriétés publiques. La transformation radicale du droit de propriété et le processus de la coopération agricole après la réforme de terre allaient à l’encontre de la loi économique et de la volonté des paysans, ce qui avait conduit à un retard des forces productives dans les régions rurales et à un niveau de revenu très inférieur pour les paysans chinois. Dans ce processus de transformation de politiques, les facteurs politiques et idéologiques avaient joué un r le prédominant, d’où des résultats défavorables. Les expériences que nous avons tirées pendant cette période montrent bien que le modèle du développement économique et l’arrangement systématique dans les régions rurales de Chine doivent satisfaire la volonté des paysans et protéger leurs intérêts fondamentaux. C’est aussi le seul moyen qui permette aux régions rurales de Chine de réaliser un développement rapide. Mots Clés: Régions Rurales de Chine, Politique de Terre, Transformation Systématique, Idéologie,Intérêts
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