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Characteristics of Abnormal Pressure Systems and Their Responses of Fluid in Huatugou Oil Field,Qaidam Basin

Acta Geologica Sinica(English Edition) 2009年第5期83卷 939-950页

作者： CHEN Xiaozhi XU Hao TANG Dazhen ZHANG junfeng HU Xiaolan tao Shu CAI Yidong School of Energy Resources China University of Geosciences Beijing 100083 China Key Laboratory of Marine Reservoir Evolution and Hydrocarbon Accumulation Mechanism Ministry ofEducation China University of Geosciences Beijing 100083 China PetroChina Exploration and Production Company Beijing 100724 China

Based on the comprehensive study of core samples, well testing data, and reservoir fluid properties, the construction and the distribution of the abnormal pressure systems of the Huatugou oil field in Qaidam Basin are discussed. The correlation between the pressure systems and hydrocarbon accumulation is addressed by analyzing the corresponding fluid characteristics. The results show that the Huatugou oil field as a whole has low formation pressure and low fluid energy; therefore, the hydrocarbons are hard to migrate, which facilitates the forming of primary reservoirs. The study reservoirs, located at the Xiayoushashan Formation （N1/2） and the Shangganchaigou Formation （N1） are relatively shallow and have medium porosity and low permeability. They are abnormal low-pressure reservoirs with an average formation pressure coefficient of 0.61 and 0.72 respectively. According to the pressure coefficient and geothermal anomaly, the N1 and N1/2 Formations belong to two independent temperature-pressure systems, and the former has slightly higher energy. The low-pressure compartments consist of a distal bar as the main body, prodelta mud as the top boundary, and shore and shallow lake mud or algal mound as the bottom boundary. They are vertically overlapped and horizontally paralleled. The formation water is abundant in the Cl^- ion and can be categorized as CaCl2 type with high safinity, which indicates that the abnormal low-pressure compartments are in good sealing condition and beneficial for oil and gas accumulation and preservation.

关键词： abnormal pressure system low-pressure compartment fluid characteristics Huatugou oil field Qaidam basin

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Mechanical design and analysis of bio-inspired reentrant negative Poisson’s ratio metamaterials with rigid-flexible distinction

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International Journal of Smart and Nano Materials 2024年第1期15卷 1-20页

作者： Xinchun Zhang Junyu Wang Qidong Sun Jingyang Li Sheng Zhou junfeng Qi Ran tao Hebei Key Laboratory of Electric Machinery Health Maintenance&Failure Prevention North China Electric Power UniversityBaodingChina Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijingChina Beijing Spacecrafts Manufacturing Factory BeijingChina

Aiming at achieving tunable reentrant structures with rigidity and uniformity,respectively,the C-shaped and S-shaped reentrant metamaterials were proposed by the bionic design of animal *** beam theory and energy methodology,the analytical expressions of the equivalent elastic modulus of the metamaterials were *** in deformation modes,mechanical properties,and energy absorption capacities were characterized by using experiments and the finite element analysis *** effects of ligament angle and thickness on the mechanical characteristics of two novel metamaterials were investigated by using a parametric *** results show that the stiffness,deformation mode,stress-strain curve,and energy absorption effects of three metamaterials are significantly *** design philosophy can be extended from 2D to 3D and is applicable at multiple dimensions.

关键词： Re-entrant mechanical metamaterials negative poisson’s ratio enhanced stiffness rigid-flexible distinction energy absorption

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无性系倍性育种在铁皮石斛产业化发展中的可行性

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生物过程 2018年第2期8卷 48-53页

作者：苏娟钞晶晶陶俊锋王晓李昆华沈庆庆马田芝岳健云南山里红生物科技有限公司云南昆明

铁皮石斛属多年生草本植物,具有养胃生津、增强免疫力、抗衰老、抗肿瘤和降血糖等巨大的药用价值,同时也具有较大的商业价值。多倍体育种作为近代作物育种常用方法之一,其优点在于多倍体植物在相对不稳定的环境中具有更为强大的生存能力... 详细信息

铁皮石斛属多年生草本植物,具有养胃生津、增强免疫力、抗衰老、抗肿瘤和降血糖等巨大的药用价值,同时也具有较大的商业价值。多倍体育种作为近代作物育种常用方法之一,其优点在于多倍体植物在相对不稳定的环境中具有更为强大的生存能力,能够适应更为恶劣的环境。采用多倍体育种方法可以快速获得多倍体铁皮石斛,并为产业化生产提供了理论依据。本文概述了铁皮石斛基本生物学特征、多倍体育种技术的研究进展及多倍体植株的鉴定方法,指出了多倍体育种技术在铁皮石斛中的应用的可行性以及产业化生产中可能出现的问题。

关键词：铁皮石斛多倍体诱导药用植物

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China’s Drought Disaster Risk Management: Perspective of Severe Droughts in 2009–2010

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International Journal of Disaster Risk Science 2012年第2期3卷 84-97页

作者： tao Ye Peijun Shi Jing’ai Wang Lianyou Liu Yida Fan junfeng Hu State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing 100875China Academy of Disaster Reduction and Emergency Management Ministry of Civil Affairs and Ministry of EducationBeijing Normal UniversityBeijing 100875China Key Laboratory of Environmental Change and Natural Disasters Ministry of Education of ChinaBeijing Normal UniversityBeijing 100875China School of Geography Beijing Normal UniversityBeijing 100875China National Disaster Reduction Center Ministry of Civil AffairsBeijing 100053China

China has been frequently and heavily affected by drought disasters. During 2009–2010, three large-scale severe droughts struck China, caused considerable social, economic, and ecological losses. These droughts showed significant regional differences. This study employs a two-stage transition framework comprising “entry” and “exit” transitions to discuss disaster risk management of drought in China, by taking the three droughts as comparative case studies. Chinese society’s response in the exit transition is examined and the underlying factors that enable the entry trigger are diagnosed. The policy responses that lead to the exit transition from these drought disasters were appropriate, but there is substantial room for improvement in management strategy regarding both entry and exit transitions. This article suggests that government policies should emphasize entry-prevention measures that reduce adverse impacts early in a drought episode rather than focus solely on improving performance in achieving a rapid exit transition from drought.

关键词： drought disaster prevention

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Event-Triggered Control for Multi-Agent Systems with Output Saturation 36

Event-Triggered Control for Multi-Agent Systems with Output ...

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第36届中国控制会议

作者： Xinlei Yi tao Yang junfeng Wu Karl H.Johansson The ACCESS Linnaeus Centre Electrical EngineeringKTH Royal Institute of Technology The Department of Electrical Engineering University of North Texas

ISBN: (纸本)9781538629185

We propose distributed static and dynamic event-triggered control laws to solve the consensus problem for multiagent systems with output *** the condition that the underlying graph is undirected and connected,we show that consensus is achieved under both event-triggered control laws if and only if the average of the initial states is within the saturation *** simulations are provided to illustrate the effectiveness of the theoretical results and to show that the control laws lead to reduced need for inter-agent communications.

关键词： Consensus Event-triggered control Multi-agent systems Output saturation

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Effect of oxide scale on corrosion behavior of HP-13Cr stainless steel during well completion process

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Journal of Materials Science & Technology 2021年第5期64卷 153-164页

作者： Wenlong Qi Jidong Wang Xuanpeng Li Yanan Cui Yang Zhao junfeng Xie Guanxin Zeng Qiuying Gao tao Zhang Fuhui Wang Shenyang National Laboratory for Materials Science Northeastern University3-11 Wenhua RoadShenyang 110819China Corrosion and Protection Laboratory Key Laboratory of Superlight Materials and Surface TechnologyHarbin Engineering UniversityMinistry of EducationNantong ST 145Harbin 150001China Petrochina Tarim Oilfield Company Shihua RDKorla 841000China Engineering Technology Research Institute Sinopec Northwest Oil Field Branch CompanyUrumqi 830011China

The well completion process in oil and gas industry,aiming to build effective exploitation,is divided into acidizing and formation water production *** scale(OS)formed on the inner wall of the HP-13Cr stainless steel tubes during the hot extrusion process changes the surface *** effects of OS on the corrosion of HP-13Cr stainless steel during well completion process were studied by corrosion measurement,spectra analysis,microscopic observation and numerical *** results indicate that the OS make no change of phase distribution and element composition of corrosion scale,while the increasing OS roughness is the dominant factor for accelerating corrosion rate during the well completion *** acidizing process,the greater surface roughness OS of HP-13Cr stainless steel increases the corrosion rate obviously due to a larger interfacial area in contact with the aggressive *** subsequent formation water production process,the turbulence eddy,formed at locations characterized with greater surface roughness OS,can deteriorate the corrosion scale and accelerate the mass transfer of the corrosive species,resulting in more serious corrosion.

关键词： Stainless steel Oxide scale Roughness Interfacial area Turbulence eddy

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A new strategy for fabrication of unique heterostructured titanium laminates and visually tracking their synchronous evolution of strain partitions versus microstructure

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Journal of Materials Science & Technology 2022年第12期107卷 70-81页

作者： Hao Ding Xiping Cui Zhiqi Wang tao Zhao Yuchen Wang Yuanyuan Zhang Hongtao Chen Lujun Huang Lin Geng junfeng Chen School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Center for Analysis Measurement and ComputingHarbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Harbin University of Science and TechnologyHarbin 150080China School of Materials Science and Engineering Fuzhou UniversityFuzhou 350116China

Heterostructured(HS)material with extraordinary mechanical properties has been regarded as one of the most promising structural ***,we reported a new strategy for preparing heterostructured pure titanium laminates that possess a good combination of strength and ductility by combining gradient structure(GS)and heterogeneous lamella structure(HLS).The deformation characteristic versus microstructure evolution of GS/HLS titanium laminates,namely the strain partitions between different-sized grains(480–25μm)was visualized using a scanning electron microscope(SEM)equipped with electron backscattered diffraction(EBSD)mode combined with the digital image correlation(SEM-DIC)with an ultrahigh spatial resolution for the first *** a result,the hetero-deformation of unique GS/HLS structure by the characteristic of strain partitions could be accurately *** the hetero-deformation could result in the hetero-deformation induced(HDI)stress strengthening and HDI hardening,which were regarded as the key reason that the resulting GS/HLS Ti laminates showed a superior combination of strength and *** could promote a more in-depth understanding of the strengtheningtoughening mechanism of heterostructured material.

关键词： Gradient structure Heterogeneous lamella structure Digital image correlation Strain partition

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Provincial-level analysis of electrification feasibility and climate policy interactions

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Environmental Science and Ecotechnology 2024年第6期22卷 286-293页

作者： Huihuang Wu Haozhe Yang Xiurong Hu Yuhan Zhou Xian Wang junfeng Liu Ying Liu Shu tao Laboratory for Earth Surface Processes College of Urban and Environmental SciencesPeking UniversityBeijing100871China Bren School of Environmental Science and Management University of CaliforniaSanta BarbaraCA93106USA College of Economics and Management Nanjing University of Aeronautics and AstronauticsNanjing211106China School of Statistics University of International Business and EconomicsBeijing100029China

Improving electrification feasibility is essential for reducing emissions from non-electric energy sources,thereby enhancing air quality and public ***,climate mitigation actions,such as carbon pricing policies,have significant potential to alleviate increasing carbon dioxide(CO_(2))and other co-emitted air ***,the interactions between climate policy and the improvement of electrification feasibility at the provincial level remain unclear,collectively impacting the net-zero transition of energy-intensive *** we combine a technologically rich economic-energy-environment model with air quality modeling across China to examine the health,climate,and economic implications of large-scale upgrades in electrification feasibility and climate policies from 2017 to *** results indicate that advancing electrification feasibility,coupled with adopting carbon pricing policies,is likely to facilitate a transition towards electricity-dominant energy *** electrification feasibility is projected to yield a 7-25%increase in nationwide climate benefits and a 5-14%increase in health benefits by *** incremental benefits,coupled with reduced economic costs,result in a 22-68%increase in net ***,regionally,improvements in electrification feasibility will lead to heightened power demand and unintended emissions from electric energy production in certain provinces(e.g.,Nei Mongol)due to the coal-dominated power ***,in major coal-producing provinces like Shanxi and Shaanxi,enhanced electrification feasibility exacerbates the negative economic impacts of climate *** study provides quantitative insights into how improving electrification feasibility reshapes energy evolution and the benefit-cost profile of climate policy at the provincial *** findings underscore the necessity of a well-designed compensation scheme between affected and unaffected provinces and coordinated emission mitiga

关键词： Climate policy Net benefits Electrification feasibility Health benefits Climate benefits

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Preparation and Properties of Polyacrylamide/Sodium Alginate Hydrogel and the Effect of Fe^(3+)Adsorption on Its Mechanical Performance

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Journal of Renewable Materials 2021年第8期9卷 1447-1462页

作者： Zheng Cao Yang Zhang Keming Luo Yinqiu Wu Hongxin Gao junfeng Cheng Chunlin Liu Guoliang tao Qingbao Guan Lei Zhang Key Laboratory of High Performance Fibers&Products Ministry of EducationDonghua UniversityShanghai201620China Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials School of Materials Science and EngineeringJiangsu Collaborative Innovation Center of Photovoltaic Science and EngineeringChangzhou UniversityChangzhou213164China Changzhou University Huaide College Jingjiang214500China National Experimental Demonstration Center for Materials Science and Engineering Changzhou UniversityChangzhou213164China Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science MOECollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao266042China

The preparation and application of functional hydrogels based on natural polysaccharides have always been a hot research *** this study,using acrylamide(AM)monomer,N,N'-methylene bisacrylamide(MBA)as crosslinking agent,potassium persulfate(K2S2O8)as initiator,in the presence of natural polysaccharide sodium alginate(SA),the PAM/SA hydrogel was prepared by free radical *** transform infrared spectroscopy(FT-IR),swelling performance tests,scanning electron microscope(SEM),thermogravimetric analysis(TGA),UV-visible spectrophotometer,mechanical property measurements were carried out to analyze the composition,morphology,and performance of the *** swelling behavior,dye adsorption performance,and the mechanical properties of PAM/SA hydrogels before and after Fe^(3+)adsorption were *** experimental results showed that the introduction of SA with 4.7%,7.8%,and 10.3%effectively improved the mechanical and dye adsorption properties of PAM composite *** adsorption capacity of PAM/4.7%SA and PAM/10.3%SA hydrogels at equilibrium can reach 40.01 and 44.02 mg/g for methylene blue,which is higher than the value 13.58 mg/g of pure PAM *** compressive strength of pure PAM hydrogel is 0.124 *** the SA content is 4.7%,7.8%,and 10.3%,the compressive strength of the PAM/SA hydrogel was corresponding to 0.130 MPa,0.134 MPa,and 0.152 MPa,***^(3+)was introduced into the PAM/SA hydrogels,and PAM/SA/Fe^(3+)double-network hydrogels with excellent mechanical properties could be prepared by adjusting the SA content(4.7%,7.8%,and 10.3%),soaking time(1 h,2 h,3 h,4 h,5 h,6 h),and Fe^(3+)concentration(4.76%,7.41%,9.09%,and 13.04%).Under the same Fe^(3+)concentration of 9.09%and adsorption time of 4 h,the compressive strengths of the PAM/4.7%SA,PAM/7.8%SA,and PAM/10.3%SA hydrogels could reach 0.354 MPa,0.767 MPa,and 0.778 MPa,respectively.

关键词： Sodium alginate acrylamide hydrogel dye adsorption mechanical properties

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The impact of China’s high-speed rail investment on regional economy and air pollution emissions

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Journal of Environmental Sciences 2023年第9期131卷 26-36页

作者： Qiong Yang Yuqing Wang Ying Liu junfeng Liu Xiurong Hu Jianmin Ma Xuejun Wang Yi Wan Jianying Hu Zhaobin Zhang Xilong Wang Shu tao Laboratory for Earth Surface Processes College of Urban and Environmental SciencesPeking UniversityBeijing 100871China School of Statistics University of International Business and EconomicsBeijing 100029China College of Economics and Management Nanjing University of Aeronautics and AstronauticsNanjing 211106China

The high-speed rail(HSR)network in China has experienced rapid development since the *** 2016,the State Council of the People’s Republic of China issued a revised version of the“Mid-and Long-term Railway Network Plan”,detailing the expansion of the railway network and construction of an HSR *** the future,the HSR construction efforts in China will further increase,which is considered to impact regional development and air pollutant ***,in this paper,we apply a transportation network-multiregional computable general equilibrium(CGE)model to estimate the dynamic effects of HSR projects on economic growth,regional disparities,and air pollutant emissions in *** results indicate that HSR system improvement could generate a positive economic impact but could also increase *** gross domestic product(GDP)growth per unit investment cost stimulated by HSR investment is found to be the largest in eastern China but the smallest in the northwest ***,HSR investment in Northwest China contributes to a substantial reduction in regional disparities in terms of the GDP per *** regard to air pollution emissions,HSR construction in South-Central China results in the largest increase in CO_(2) and NO_(X) emissions,while for CO,SO_(2),and fine particulate matter(PM_(2.5))emissions,the largest increase occurs due to HSR construction in Northwest *** the regional level,the provinces with large changes in accessibility also experience large changes in their air pollutant emissions.

关键词： Computable general equilibrium model High-speed rail investment Economic impact Regional disparity Air pollution emissions

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