检索结果-南通市图书馆

MATHEMATICAL AND COMPUTER SIMULATION TECHNOLOGY OF CONDENSATE OIL AND GAS WELLS STIMULATED BY ELECTROMAGNETIC HEATING

在线全文

学校读者我要写书评

暂无评论

Journal of Hydrodynamics 2007年第3期19卷 292-302页

作者： PU Chun-sheng PEI Run-you huang Hai FENG Jin-de SU guo-hui Institute of Petroleum and Gas Engineering China University of Petroleum Beijing 102200 China College of Petroleum Engineering China University of Petroleum（East China） Dongying 257061 China Petroleum Engineering department Xi＇an Shiyou University Xi＇an 710065 China

In this article, the recent research achievements on the theory and technology of condensate oil and gas wells stimulated by electromagnetic induction heating during middle or late exploitation period were introduced for the first time at home and abroad. A new kind of electromagnetic wave induction heating equipment XAEMH-1 was developed. Taking near wellbore zone temperature field as the main research object, which is the key factor for the condensation and retrograde vaporization during electromagnetic heating, the mathematical simulation model for a condensate oil and gas well stimulated by electromagnetic heating to eliminate blockage near wellbore region was established. A corresponding computer system was developed to dynamically predict and evaluate the efficiency of this electromagnetic heating process. Through this computer system, the near wellbore region distributions of several important factors such as temperature, pressure, condensate oil saturation and relative permeability can be described quantitatively. A condensate gas well in a late exploitation period reservoir here in china was chosen as a practical example to test the effectiveness of this new technology and some satisfactory results were obtained. These results proved that it is feasible to eliminate the near wellbore region blockage by electromagnetic heating. A new prospective stimulation method was given for the condensate oil and gas reservoirs during middle or late exploitation period.

关键词： Condensate oil and gas wells electromagnetic heating stimulation mathematical and computer simulation

Frequency Measurement of the Electric Quadrupole Transition in a Single Laser-Cooled 40Ca＋

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2011年第1期28卷 74-77页

作者： LIU Qu huang Yao CAO Jian OU Bao-Quan guo Bin GUAN Hua huang Xue-Ren GAO Ke-Lin State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics (WIPM) Chinese Academy of Sciences Wuhan 430071 Centers for Cold Atom Physics Chinese Academy of Sciences Wuhan 430071 Graduate School of the Chinese Academy of Sciences Beijing 100049 department of Physics Science College National University of Defense Technology Changsha 410073

The optical frequency of the 4s2.1/2.3d2.Ds/2.transition in a single trapped and laser-cooled 40 Ca＋ ion is measured with an optical frequency comb system referenced to a hydrogen maser, A 72.-nm laser can be locked ... 详细信息

关键词： Lasers Measurement

Exogenous dendritic cells aggravate atherosclerosis via P-selectin/PSGL-1 pathway

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

BIOCELL 2020年第2期44卷 225-236页

作者： LEI ZHONG LEI guo ZHISHUAI YE SHANFENG ZHANG RONGCHONG huang department of Cardiology The First Affiliated Hospital of Dalian Medical UniversityDalian116011China Cardiac Center/Division of Cardiovascular Diseases Beijing Friendship HospitalCapital Medical UniversityBeijing100050China Dalian Medical university Dalian Medical UniversityDalian116044China

Studies have found that a large number of inflammatory cells,P-selectin,and mature dendritic cells(DCs)are expressed in the damaged and shoulder parts of atherosclerotic plaque,which demonstrates that P-selectin and mature DCs participate in the immune inflammatory response leading to the development of ***,it is unclear how the above factors interact in this *** this study,we investigated the role of P-selectin and its receptor,P-selectin glycoprotein ligand(PSGL)-1 in atherosclerosis,with the finding that DC surface marker expression was consistently high in the P-selectin group while consistently low in the PGSL-1+DCs group,with CD40 and CD86 expressed by 3.84%and 2.05%for the *** highest expression of CD80,CD83,and MHC II was discovered in the DC group,at 7.49%,3.68%,and 8.98%,*** of this study are similar to those obtained previously by Ye et al.(2.17),which showed larger atherosclerotic lesions in mice that received exogenous DCs,compared with those treated with *** this study,the greatest level of atherosclerosis,fibrosis,and lipid deposition was also seen in mice that received exogenous DCs.

关键词： Glycoprotein ligand Toll-like receptor 4 Coronary heart disease

19例一穴肛畸形患儿术后排便排尿功能预后及生存质量报告

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中华小儿外科杂志 2024年第6期45卷 504-510页

作者：李冠潼刘兆州张雅楠李樱子陈永卫郭卫红黄金狮首都医科大学附属北京儿童医院新生儿外科北京100045

目的评估一穴肛畸形患儿术后的排便排尿功能预后及生存质量(quality of life,QOL)。方法回顾性分析2.09年1月至2.2.年12.首都医科大学附属北京儿童医院新生儿外科收治且获得规律随访的19例"一穴肛畸形"患儿的临床资料。对于年龄8.5分... 详细信息

目的评估一穴肛畸形患儿术后的排便排尿功能预后及生存质量(quality of life,QOL)。方法回顾性分析2.09年1月至2.2.年12.首都医科大学附属北京儿童医院新生儿外科收治且获得规律随访的19例"一穴肛畸形"患儿的临床资料。对于年龄2.分,总分≥17分提示排便功能良好,总分12.16分提示排便功能一般,总分12.提示排便功能不良;采用排尿功能障碍和尿失禁症状评分系统(dysfunctional voiding and incontinence scoring system,DVAISS)进行排尿功能评估,评分>8.5分提示排尿功能异常。选用儿童QOL普适性核心量表PedsQLTM4.0中文版对本研究随访时年龄>2.患儿的QOL进行评估。通过Spearman相关分析探索Rintala评分量表、DVAISS评分量表得分与QOL量表得分的相关性。结果19例患儿于关瘘后随访7~136个月,平均随访61.5个月。1例患儿因直肠黏膜脱垂再次手术,1例患儿因肠梗阻再次手术。在本研究年龄2.患儿出现排尿淋漓不尽及污裤等症状。在年龄≥4岁的13例患儿中,7例患儿排便功能良好;10例患儿排尿功能正常。随访时年龄>2.的16例患儿儿童生存质量普适性核心量表PedsQLTM4.0中文版家长报告表得分为(83.5±11.6)分。Rintala评分量表得分与QOL量表得分存在正相关关系(r=0.64,P=0.018);DVAISS评分量表得分与QOL量表得分存在负相关关系(r=0.66,P=0.014)。结论多数一穴肛畸形患儿术后排便功能与排尿功能预后较好,但共同管长度≥3 cm的患儿预后较差。排便或排尿功能较差会对患儿的QOL评分产生负面影响。针对一穴肛患儿应建立完善的多学科随访模式。

关键词：肛门直肠畸形泄殖腔畸形预后

Freeman-Burian综合征的临床表现、诊断及遗传学特征

在线全文

学校读者我要写书评

暂无评论

中华手外科杂志 2024年第1期40卷 9-13页

作者：陈丹田文孙丽颖钟文耀郭阳黄志峰赵宗璇北京大学第四临床医学院北京100035 北京积水潭医院手外科北京100035

目的探究既往临床诊断为Freeman-Burian综合征(Freeman-Burian syndrome,FBS)患者的诊断情况及相关遗传学特点。方法选择我科就诊的6例临床诊断为FBS并且进行了全外显子组基因检测的患者,男5例,女1例,平均年龄2.6岁,开展回顾性研究。对... 详细信息

目的探究既往临床诊断为Freeman-Burian综合征(Freeman-Burian syndrome,FBS)患者的诊断情况及相关遗传学特点。方法选择我科就诊的6例临床诊断为FBS并且进行了全外显子组基因检测的患者,男5例,女1例,平均年龄2.6岁,开展回顾性研究。对既往留存的患者信息、临床资料、照片、检查结果以及二代测序检测结果进行分析,总结6例患者的临床表现特征及遗传学特点。结果这6例临床诊断为FBS的患者中仅1例符合FBS诊断标准。余下5例患者均为DA 2.型,其中1例DA 2.1型、2.DA 2.2.、1例DA 2.3型、1例DA 2.4型。6例患者均无相关家族史,5例患者为新发突变。1例符合FBS诊断标准的患者存在基因MYH3突变,但遗传形式表现为常染色体隐性遗传。结论本组仅1例为FBS,余5例DA 2.型患者被误诊。

关键词：先天畸形遗传学 Freeman-Burian综合征 Sheldon-Hall综合征远端关节挛缩

Sunspot rotation and magnetic transients associated with flares in NOAAAR 1142.

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2017年第8期17卷 47-56页

作者： Jian-Chuan Zheng Zhi-Liang Yang Jian-Peng guo Kai-Ming guo Hui {2. Xuan Song Wei-Xing Wan department of Astronomy Beijing Normal University Beijing 100875 China Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy ofSciences Beijing 100029 China College of Earth Sciences University of Chinese Academy of Sciences Beijing 100049 China

We analyze sunspot rotation and magnetic transients in NOAA AR 1142. during two X-class(X5.4 and X1.3)flares using data from the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory.A large leading sunspot with positive magnetic polarity rotated *** expected,the rotation was significantly affected by the two *** transients induced by the flares were clearly evident in the sunspots with negative *** were moving across the sunspots with speed of order 3-7 km ***,the trend of magnetic flux evolution in these sunspots exhibited changes associated with the *** results may shed light on understanding the evolution of sunspots.

关键词： sunspots—Sun rotation—Sun magnetic fields

Ultralong cycle life enabled by in situ growth of CoMo_(1-x)P/Mo heterostructure for lithium-sulfur batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2022年第10期31卷 5-12,I0001页

作者： Donghua guo Mengwei Yuan Xingzi Zheng Miaomiao Li Caiyun Nan Genban Sun Xianqiang huang Huifeng Li beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry&Chemical EngineeringLiaocheng UniversityLiaocheng 252059ShandongChina department of Physics and Applied Optics beijing Area Major Laboratory Beijing Normal UniversityBeijing 100875China

Lithium-sulfur batteries(Li-S batteries) are considered as promising new-generation electrochemical energy storage devices due to their extremely high theoretical energy density(2.00 Wh kg-1) and theoretical specific capacity(1675 m Ah g^(-1)). However, numerous problems such as poor conductivity and the shuttle effect during discharge-charge process limit the practical application of lithium-sulfur batteries. In this work, porous tubular Co Mo_(1-x)P/Mo constructed by in situ growth of metal Mo was designed as the sulfur host for lithium-sulfur batteries. The introduction of Mo modulated the electronic structure of Co Mo P to improve the conductivity of cathode and facilitate the redox kinetics, as well as the Co Mo_(1-x)P/Mo heterostructure was beneficial to inhibit the shuttle effect through the interaction with lithium polysulfides, which improved cycling stability. As a result, Co Mo_(1-x)P/Mo/S cathode had a low-capacity decay rate of only 0.02.% per cycle after 2.00 cycles at 0.5 C. This work provided a new perspective for the further design of high-performance lithium-sulfur battery cathode materials.

关键词： Metal phosphide Heterostructure Long cycle Shuttle effect Li-S batteries

Safety and efficacy of transjugular intrahepatic portosystemic shunt combined with palliative treatment in patients with hepatocellular carcinoma

在线全文

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2019年第13期7卷 1599-1610页

作者： Shi-Hua Luo Jian-guo Chu He huang Ke-Chun Yao department of Radiology Zhongnan Hospital of Wuhan University Wuhan 430071 Hubei Province China department of Radiology Air Force Medical Center of PLA Beijing 100142 China department of Ultrasound Air Force Medical Center of PLA Beijing 100142 China

BACKGROUND There is a close relationship between cirrhosis and hepatocellular carcinoma(HCC).Transjugular intrahepatic portosystemic shunt(TIPS)has good clinical effect in treating the complication of portal ***,because of the risk of postoperative liver failure,severe complications,and low survival rate for HCC,TIPS is contraindicated in patients with portal hypertension and liver *** studied a large cohort of patients with cirrhosis and HCC who underwent TIPS for recurrent variceal bleeding and/or *** To assess the safety,efficacy,and survival rate in patients with HCC who underwent *** THODS Group A comprised 2.7 patients with HCC and portal hypertension who underwent the TIPS procedure between 1999 and *** TIPS deployment,these patients received palliative treatment for *** B comprised a cohort of 136 HCC patients with portal hypertension who did not undergo TIPS *** B received palliative treatment for HCC plus medical therapy for portal *** clinical outcomes and survival rate were *** UL TS In Group A,the primary technical success rate was 97.69%for TIPS placement,and no severe procedure-related complications of TIPS placement were *** control of variceal bleeding(VB)within 1 mo did not differ significantly between the groups(P=0.2.1).Absorption of refractory ascites within 1 mo,recurrence of VB,and recurrence of refractory ascites differed significantly between the groups(P=0.017,0.02.,and 0.009,respectively).By comparison,the rate of hepatic encephalopathy in Group B was lower than that in Group A(P=0.036).The 1-,2.,3-,4-,and 5-year survival rates were significantly different between Groups A and B(X2.12.2.7,P=0.018;X2.12.457,P=0.014;X2.2..490,P=0.013;X2.2..956,P=0.009,and X2.2..596,P=0.006,respectively).The mean survival time was 43.7 mo in Group A and 31.8 mo in Group *** survival time was 50.0 mo in Group A and 33.0 mo in Group *** and median survival differe

关键词： Hepatocellular carcinoma Portal hypertension Transjugular intrahepatic portosystemic shunt Transarterial chemoembolization Radiofrequency ablation

Influence of terminal alkyl chain length on helical twisting property of chiral 1,2.propanediol derivatives

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2009年第12期20卷 1435-1438页

作者： Wei huang Guang Da Yang Zhen Yu Bian Xiao Juan Wu guo Jing Ma Qi huang Huai Yang department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China National Laboratory of Electro-Optics System Technology Hebei 065201 China china Classification Society Certification Company Beijing 100006 China

In this study, a novel series of chiral 1,2.propanediol derivatives with different terminal alkyl chain length were synthesized and characterized by FT-IR, ^1H NMR and DSC. After doped into a nematic liquid crystal host, all the chiral dopants induced chiral nematic liquid crystals exhibiting a helix inversion with temperature variation. The results indicate that terminal alkyl chain length has a prominent influence on helical twisting property of the chiral dopants. With increasing the terminal alkyl chain length, the molecular twisting power increases, the helix inversion temperatures varies slightly while the phase transition temperature decreases. An odd-even effect may exist in the molecular twisting power of the chirai dopants.

关键词： Chiral dopant Liquid crystal Helix inversion Molecular twisting power