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Natural gas characteristics and gas-source comparisons of the Lower Triassic Feixianguan Formation,Eastern Sichuan Basin,China

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Petroleum Science 2023年第3期20卷 1458-1470页

作者： Zi-Yun Zheng Yin-Hui Zuo hua-Guo Wen De-Ming Li yang Luo Jia-Zhen Zhang Mei-hua yang Jian-Cheng Zeng State Key Laboratory of Oiland Gas Gelogy and Exploitation Chengdu University of TechnologyChengduSichuan610059China PetroChina Southwest Oil&Gas Field Company ChengduSichuan610051China

There is great controversy regarding the origin and source of natural gas in the Lower Triassic Feix-ianguan Formation in the Eastern Sichuan *** seriously restricts the study of natural gas dy-namics in the Feixianguan Formation and thus hampers natural gas exploration in the region,so further study is urgently *** experimental tests of natural gas composition,stable isotopes,and noble gas isotopes with gas chromatography(GC)and mass spectrometry(MS)studies of source rock and reservoir asphalt saturated hydrocarbons,the natural gas geochemical characteristics,the genetic identification and a gas-source comparison of the Feixianguan Formation were ***,con-strained by the thermal history,the histories of gas generation and expulsion were restored by basin simulation ***,a gas accumulation model was established for the Feixianguan *** results showed that(1)the H_(2)S-rich and H2S-poor gas reservoirs of the Feixianguan Formation are distributed on the east and west sides of the Kaijiang-Liangping trough in the Eastern Sichuan Basin,*** carbon and hydrogen isotope compositions of the natural gas in the gas reservoirs are generally heavy and have typical characteristics of high-maturity dry gas reservoirs.(2)The natural gas of the Feixianguan Formation is organic thermogenic gas,which is mainly oil-type gas generated by the secondary cracking of crude *** gas-generating parent material is mainly type II kerogen.(3)The natural gas of the Feixianguan Formation in the Eastern Sichuan Basin was mainly generated by argil-laceous source rocks of the Upper Permian Longtan Formation.(4)Natural gas accumulation occurred as follows:the paleo-structure heights were filled with crude oil in the Early Jurassic,and paleo-oil res-ervoirs were formed in the Feixianguan Formation;during the Middle-Late Jurassic,the paleo-oil res-ervoirs were cracked when the reservoir temperatures rose above 160 C,and paleo-gas reservoi

关键词： Eastern Sichuan Basin Feixianguan Formation Natural gas origin Gas-source comparison Longtan Formation

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Study and Application of Nb-V-Ti Microalloyed Cast Steel

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Journal of Iron and Steel Research International 2005年第3期12卷 56-59页

作者： HANJian-min LIUYuan-fu LIWei-jing LIRong-hua XUXiang-yang WANGJin-hua BeijingJiaotongUniversity Beijing100044China

A new type of Nb-V-Ti microalloyed cast steel was produced. Computer simulation was adopted to optimize the content of alloying elements. The microstructure of the microalloyed steel was analyzed. The fatigue property, wear and friction properties and rupture toughness of the steel were investigated. The service and operating properties of Nb-V-Ti microalloyed cast steel coupler were also examined. The results show that the steel has excellent comprehensive mechanical properties. The granular bainite structure and precipitation strengthening are the primary strengthening mechanism. The fine grain brings the steel good plasticity and excellent toughness. Various service and operating properties of Nb-V-Ti microalloyed cast steel automatic coupler are excellent.

关键词： microalloying cast steel microstructure mechanical property

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Comparison of microstructure, mechanical and wear behaviour of laser cladded stainless steel 410 substrate using stainless steel 420 and Colmonoy 5 particles

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Journal of Iron and Steel Research International 2020年第12期27卷 1446-1455页

作者： N.Jeyaprakash Che-hua yang KRRamkumar Guang-zhou Sui Additive Manufacturing Center for Mass CustomizationProduction National Taipei University of TechnologyTaipei 10608TaiwanChina Institute of Manufacturing Technology National TaipeiUniversity of TechnologyTaipei 10608TaiwanChina Department of Metallurgical and Materials Engineering Indian Institute of Technology MadrasChennai 600036India Graduate Institute of Mechanical and Electrical Engineering National Taipei University of TechnologyTaipei 10608TaiwanChina

Stainless steel (SS) 410 is widely used in many components of nuclear reactors due to its good corrosion resistance and high strength. However, wear is a major issue of these components due to its continuous sliding. SS 420 and Colmonoy 5 particles were deposited over SS 410 substrate by laser cladding process. Then, X-ray diffraction was used to find the phases present after cladding process. Further, coating morphologies were analysed by scanning electron microscopy (SEM) twinned with energy-dispersive spectroscopy. The obtained morphology indicates the hard laves phase present in the Colmonoy 5 cladding surface and needle-like structure in SS 420 cladding surface. Then, Vickers microhardness test was carried out in order to study the hardness and load-carrying capacity of the cladding specimen. Among those, Colmonoy 5 cladding specimen provide higher hardness due to the presence of laves phase formation. Then, the dry sliding wear study was conducted to calculate the mass loss after 2500 m of sliding. The combined effect of hardness and laves phase formation were reflected in dry sliding wear study analysis of the specimens. Then, to study the wear mechanism and roughness, worn surface morphologies were captured using SEM and white light interferometer, respectively.

关键词： Stainless steel(SS)410 Stainless steel(SS)420 Colmonoy 5 Laser cladding Laves phase Wear behaviour Mechanism Roughness

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Effect of sitagliptin combined with Yiqi yangyin huoxue decoction on clinical efficacy and hemorheology in early diabetic nephropathy

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World Journal of Diabetes 2023年第9期14卷 1412-1421页

作者： Jun Ling Yan-hua yang Department of Pharmacy Changzhou Geriatric Hospital Affiliated to Soochow UniversityChangzhou NO.7 People’s HospitalChangzhou 213000Jiangsu ProvinceChina

BACKGROUND Early diabetic nephropathy(DN)is a complication of diabetes *** mainly affects kidney microvessels and glomerular function,and its timely and effective treatment is critical for early ***,the effects of treatments comprising simple Western medicine are not *** the promotion and implementation of integrated Chinese and western medicine treatments,remarkable results have been achieved for many *** this end,we explored the clinical efficacy of integrated traditional Chinese and western medicines for the treatment of early *** To investigate the effect of sitagliptin tablets combined with Yiqi yangyin huoxue decoction on clinical efficacy and hemorheology in patients with early *** Through a retrospective analysis,123 patients with early DN were admitted to the endocrinology clinic of the Changzhou NO.7 People’s Hospital from January 2021 to October 2022 and were selected as study *** rigorous screening,100 patients with early DN were *** control group(CG,n=50)and the observation group(OG,n=50)were divided according to the treatment *** CG were treated with sitagliptin,and the OG were treated with sitagliptin plus the Yiqi yangyin huoxue *** groups were treated for 3 *** both groups,the baseline data and clinical efficacy were compared,and changes in blood glucose levels,lipid levels,renal function,and hematological indicators before(T0)and after(T1)treatment were *** The total effective rate for the OG was 94.00%and that of the CG was 80.00%(P<0.05).After treatment(T1),the levels of fasting blood glucose,2 h postprandial glucose,total cholesterol,triacylglycerol,and low-density lipoprotein cholesterol in OG patients were obviously lower than those in the CG(P<0.05),and cystatin C,homocysteine,urinary microalbumin,and blood creatinine values in OG patients were also obviously lower than those in the CG(P<0.05);erythrocyte deposition,plasma viscosity,whole blood hig

关键词： Sitagliptin Yiqi yangyin huoxue decoction Early diabetic nephropathy Renal function Clinical effects Hemorheology

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Evoluf ion from TD-SCDMA to TD-LTE

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China Communications 2008年第3期5卷 86-89页

作者： yang hua TD-SCDMA Industry Alliance TD SCDMA Ind Alliance Alliance OH USA

This paper gives the brief introduction to key features of TD-SCDMA and TD-LTE(TDD Long Term Evolution).For the TD-SCDMA system,key technologies such as joint detection,smart antenna and synchronization are described and *** the TD-LTE system,important technologies such as OFDM,MIMO,uplink timing control,inter-cell interference coordination are *** is shown that the TD-SCDMA can be evolved to TD-LTE smoothly.

关键词： TD-SCDMA TD-LTE joint detection smart antenna synchronization OFDM MIMO

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Efficacy and safety of adalimumab in comparison to infliximab for Crohn's disease:A systematic review and meta-analysis

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World Journal of Clinical Cases 2022年第18期10卷 6091-6104页

作者： hua-hua yang Yi huang Xu-Chun Zhou Ruo-Nan Wang Department of Gastroenterology The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Endocrinology Liyuan HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430077Hubei ProvinceChina

BACKGROUND Adalimumab(ADA)and infliximab(IFX)are the cornerstones of the treatment of Crohn’s disease(CD).It remains controversial whether there is a difference in the effectiveness and safety between IFX and ADA for *** To perform a meta-analysis to compare the effectiveness and safety of ADA and IFX in *** Pub Med,Embase,Cochrane Library,and Web of Science databases were *** studies were considered for *** primary outcomes were induction of response and remission,maintenance of response and remission,and secondary loss of *** events were secondary *** Fourteen cohort studies were *** was no apparent difference between the two agents in the induction response[odds ratio(OR):1.27,95%confidence interval(CI):0.93-1.74,P=0.14]and remission(OR:1.11,95%CI:0.78–1.57,P=0.57),maintenance response(OR:1.08,95%CI:0.76–1.53,P=0.67)and remission(OR:1.26,95%CI:0.87–1.82,P=0.22),and secondary loss of response(OR:1.01,95%CI:0.65–1.55,P=0.97).Subgroup analysis revealed ADA and IFX had similar rates of response,remission,and loss of response either in anti-tumor necrosis factor-αna?ve or non-na?ve ***,there was a similar result regardless of whether CD patients were treated with optimized therapy,including dose intensification,shortening interval,and combination ***,ADA had a fewer overall adverse events than IFX(OR:0.62,95%CI:0.42–0.91,P=0.02).CONCLUSION ADA and IFX have similar clinical benefits for anti-tumor necrosis factor-αna?ve or non-na?ve CD *** adverse events rate is higher in patients in the IFX group.

关键词： Crohn disease Adalimumab Infliximab Clinical efficacy Adverse effects Meta-analysis

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Effects of Contaminations on Corona Pulse Inception Characteristics of HVDC Conductor

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高压电器 2017年第6期53卷 42-47页

作者： WANG Qingliang yang hua ZHANG Qiaogen State Grid Shijiazhuang Electric Power Supply Company Shijiazhuang 050000 China State Grid Hebei Electric Power Research Institute Shijiazhuang 050000 China State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Xi'an 710049 China

Contaminations adhering on HVDC transmission line will change its corona characteristics to generate electromagnetic pollution. The corona-induced radio interference and audible noise become important factors influencing the configuration and costs of transmission project. For understanding the effects of contaminations on the corona pulse characteristics of an HVDC transmission line,a corona cage was adopted to experimentally investigate corona pulse inception voltage and corona pulse characteristics of the conductors with different contaminations on surfaces. The contaminations include simulated contaminations,carbon powder,cement and fine sand. The results show that when conductor is covered with contaminations,the positive polarity corona pulses have high amplitude and low frequency,while the negative polarity corona pulses have low amplitude and incremental high frequency components. The corona pulse inception voltage presents a negatively exponential decrease with the increase of contamination density,showing a saturation trend. Fine sand shows the greatest effect on the corona pulse inception voltage with positive polarity,while cement shows the least effect. A function of corona inception voltage and surface contamination density is given. This study may provide reference for design of transmission lines.

关键词：高压电器电压技术电力技术电力管理

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Concept Association and Hierarchical Hamming Clustering Model in Text Classification

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Wuhan University Journal of Natural Sciences 2004年第3期9卷 339-342页

作者： SuGui-yang LiJian-hua MaYing-hua LiSheng-hong YinZhong-hang SchoolofElectronicEngineering ShanghaiJiaotongUniversityShanghai200030China

We propose two models in this paper. The concept of association model is put forward to obtain the co-occurrence relationships among keywords in the documents and the hierarchical Hamming clustering model is used to reduce the dimensionality of the category feature vector space which can solve the problem of the extremely high dimensionality of the documents' feature space. The results of experiment indicate that it can obtain the co-occurrence relations among key-words in the documents which promote the recall of classification system effectively. The hierarchical Hamming clustering model can reduce the dimensionality of the category feature vector efficiently, the size of the vector space is only about 10% of the primary dimensionality. Key words text classification - concept association - hierarchical clustering - hamming clustering CLC number TN 915. 08 Foundation item: Supporteded by the National 863 Project of China (2001AA142160, 2002AA145090)Biography: Su Gui-yang (1974-), male, Ph. D candidate, research direction: information filter and text classification.

关键词： text classification concept association hierarchical clustering hamming clustering

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On the extra edge-connectivity of hypercubes

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Applied Mathematics(A Journal of Chinese Universities) 2016年第2期31卷 198-204页

作者： ZHANG Ming-zu MENG Ji-xiang yang Wei-hua College of Mathematics and System Sciences Xinjiang University Department of Mathematics Taiyuan University of Technology

The classical hypercube structure is a popular topological architecture in parallel computing environments and a large number of variations based on the hypercube were posed in the past three decades. Reliability evaluation of systems is important to the design and maintenance of multiprocessor systems. The h-extra edge-connectivity of graph G（V, E） is a kind of measure for the reliability of interconnection systems, which is defined as the minimum cardinality of a subset of edge set, if any, whose deletion disconnects G and such that every re- maining component has at least h vertices. This paper shows that the h-extra edge-connectivity 2n-1 2n-1 of the hypercube Qn is a constant 2n-1 for 2n-1/3≤ h2n-1, and n ≥ 4, which extends the result of [Bounding the size of the subgraph induced by m vertices and extra edge-connectivity of hypercubes, Discrete Applied Mathematics, 2013, 161（16）： 2753-2757].

关键词： Edge fault tolerance Extra edge-connectivity Hypercube

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R-mode instability of strange stars and observations of neutron stars in LMXBs

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Research in Astronomy and Astrophysics 2015年第6期15卷 871-878页

作者： Chun-Mei Pi Shu-hua yang Xiao-Ping Zheng Department of Physics and Engineering Hubei University of Education Institute of Astrophysics Central China Normal University

Using a realistic equation of state （EOS） of strange quark matter, namely, the modified bag model, and considering the constraints on the parameters of EOS by the observational mass limit of neutron stars, we investigate the r-mode instability window of strange stars, and find the same result as in the brief study of Haskell, Degenaar and Ho in 2012 that these instability windows are not consistent with the spin frequency and temperature observations of neutron stars in low mass X-ray binaries.

关键词： dense matter -- stars: neutron -- stars: oscillations

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