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油气混输工艺在低输量管道安全运行中的优势分析

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石油工程建设 2024年第1期50卷 38-43,59页

作者：陈丽丽孙建利刘志勇张光宇赵启昌郭晓军中国石油华北油田分公司河北任丘062550 中国石油工程建设有限公司北京设计分公司北京100085

为了保证华北油田某区块J-S输油管道能够在低输量下安全运行,对比分析油气混输和低含水油输送两种技术方案,优选通过油气混输的运行方式降低J-S输油管道最低启输量和启输温度。通过在J站新建伴生气压缩、注入、放空系统,在S站新建分离... 详细信息

为了保证华北油田某区块J-S输油管道能够在低输量下安全运行,对比分析油气混输和低含水油输送两种技术方案,优选通过油气混输的运行方式降低J-S输油管道最低启输量和启输温度。通过在J站新建伴生气压缩、注入、放空系统,在S站新建分离、过滤、放空系统,利用两相流在管道中的流动特性,提高管道内介质流速,并将J站富余的伴生气资源通过管输的方式输送至S站。设计采用PIPESIM软件及HYSYS软件进行模拟,计算结果相互验证。该方案不但解决了J-S输油管道低输量下安全运行的问题,同时缓解了J油田与S油田伴生资源分布不均匀的矛盾,降低了油田原油生产成本。

关键词：低输量油气混输两相流腐蚀速率安全经济

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羟胺衍生物的[3,3]σ迁移反应及其应用

有机化学 2021年第8期41卷 3002-3014页

作者：张广宇许家喜北京化工大学化学学院有机化学系化工资源有效利用国家重点实验室北京100029

[3,3]σ迁移反应作为有机化学中的经典反应,自发现以来,反应类型不断扩大,且一直广泛应用于有机与药物合成等领域.因为羟胺衍生物的N—O键强度较弱,较易断裂,[3,3]σ迁移反应在较为温和的条件下即可进行,得到含有羟基和氨基的复杂分子,... 详细信息

[3,3]σ迁移反应作为有机化学中的经典反应,自发现以来,反应类型不断扩大,且一直广泛应用于有机与药物合成等领域.因为羟胺衍生物的N—O键强度较弱,较易断裂,[3,3]σ迁移反应在较为温和的条件下即可进行,得到含有羟基和氨基的复杂分子,近年来,该类反应引起越来越多的关注.综述了羟胺衍生物的[3,3]σ迁移反应,包括N-芳基-O-烯基羟胺、N,O-二芳基羟胺、N,O-双烯基羟胺、N-烯基-O-芳基羟胺和N-烯基-O-酰基羟胺等化合物和中间体的重排反应,并对羟胺衍生物的[3,3]σ迁移反应及其未来的发展提出了新的展望.

关键词： σ迁移羟胺衍生物重排亲核反应 N—O键

The bright star survey telescope for the planetary transit survey in Antarctica

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Science Bulletin 2016年第5期61卷 383-390页

作者： Qiguo Tian Peng Jiang Fujia Du Jian Wang Zhengyang Li Xiaoyan Li Zhiyong zhang Haiping Lu Xiangyan Yuan Huigen Liu Hui zhang Luming Sun Liang Chang Jianguo Wang Shaohua zhang Tuo Ji Xiheng Shi Jie Chen guangyu zhang Minghao Jia Jiajing Liu Junyan Zhou Xiang Pan Shucheng Dong Fengxin Jiang Hongfei zhang Jilin Zhou Lifan Wang Hongyan Zhou Polar Research Institute of China Shanghai 200136 China School of Astronomy and Space Science Nanjing UniversityNanjing 210093 China National Astronomical Observatories/Nanjing Institute of Astronomical Optics and Technology Chinese Academy of Sciences Nanjing 210042 China State Key Laboratory of Technologies of Particle Detection and Electronics Department of Modern Physics University of Science and Technology of China Hefei 230026 China Key Laboratory of Modern Astronomy and Astrophysics(Nanjing University) Ministry of Education Nanjing 210093China Key Laboratory for Research in Galaxies and Cosmology Department of Astronomy University of Science and Technology of China Chinese Academy of Sciences Hefei 230026 China National Astronomical Observatories/Yunnan Observatory Chinese Academy of Sciences Kunming 650011 China Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of Sciences Kunming 650011 China Purple Mountain Observatory Chinese Academy of ScienceNanjing 210008 China

Transiting extrasolar planets(exoplanets),especially those orbiting bright stars, are desired for study of the diversity of planetary compositions, internal structures and atmospheres beyond our solar system. Dome A at Antarctica is a promising site for planetary transit surveys,where the continuous darkness and the large clear-sky fraction in the winter months greatly enhance the detection efficiency. The Chinese Small Telescope ARray and the Antarctic Survey Telescopes are the first facilities that have been operated at Dome A for use in exoplanet surveys. To increase the sky coverage, a low-temperature-resistant wide-field robotic telescope, named the bright star survey telescope(BSST), has been developed to join the ongoing planetary transit survey in Antarctica. The BSST has an aperture size of 300 mm and is equipped with a largeframe 4K×4K CCD camera to receive starlight from a 3.°4×3.°4 field of view. The BSST was operated at Lijiang observatory in April and May 2015 for a test *** precision of 3.5 mmag was achieved for stars with V～11 mag using 75 s exposures. The transiting events of two Jupiter-size exoplanets, HAT-P-3b and HATP-12 b, were observed on May 10 and May 20, 2015,respectively.

关键词： Instrumentation Exoplanet Photometry Antarctic Site

以颈部抬起无力为首发表现的颅内静脉窦血栓1例报告

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华北理工大学学报（医学版） 2024年第1期26卷 75-77页

作者：吴浩凯王博瑶张光宇郑富霞范海燕王秀杰李群喜赵晓晶华北理工大学附属医院神经内科四病区河北唐山063000 华北理工大学附属医院神经外科二病区河北唐山063000

颅内静脉窦血栓形成(cerebral venous sinus thrombosis,CVST)是一种缺血性脑血管疾病,临床上较为少见且临床表现无明显特异性。华北理工大学附属医院神经内科四病区收治的1例以颈部抬起无力为首发症状的颅内静脉窦血栓形成患者,现对其... 详细信息

颅内静脉窦血栓形成(cerebral venous sinus thrombosis,CVST)是一种缺血性脑血管疾病,临床上较为少见且临床表现无明显特异性。华北理工大学附属医院神经内科四病区收治的1例以颈部抬起无力为首发症状的颅内静脉窦血栓形成患者,现对其临床资料进行报道并对相关文献进行复习,以讨论颅内静脉窦血栓形成的病因、发病机制、临床表现、辅助检查、治疗及预后,旨在为此类患者的早期诊治提供参考性意见。

关键词：颅内静脉窦血栓临床表现治疗

油田采出液余热资源梯级利用设计方法与工程实践

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石油石化节能与计量 2024年第8期14卷 102-108页

作者：张光宇陈丽丽亢清波敬蜀蓉敬小龙李秉军路遥军中国石油工程建设有限公司北京设计分公司中国石油华北油田分公司

随着低碳(零化石)采油厂建设的深入开展,华北油田近年来通过热泵技术或者直接换热等方法对矿内油田中高温采出液余热资源进行开发利用替代站场传统加热炉供热系统,降低采出水回注温度。基于采出液一次换热过程中取热温差大、回注温度高... 详细信息

随着低碳(零化石)采油厂建设的深入开展,华北油田近年来通过热泵技术或者直接换热等方法对矿内油田中高温采出液余热资源进行开发利用替代站场传统加热炉供热系统,降低采出水回注温度。基于采出液一次换热过程中取热温差大、回注温度高的特点,利用热泵等技术进一步把热量提取出来,导致运行费用较高。冀中南部SN油田通过采用n级梯度换热设计计算方法与流程框图,新建采出液处理区、采液及回注管线、换热系统、增压单元、回注系统,对ze90井中高温采出液余热资源进行梯度高效利用。该技术成功应用后不但实现S站场3240 kW加热炉热负荷全替代,同时与一次换热相比,采出液余热资源热能利用率提高90%以上,站场采出液量降低56%,节约运行成本70.2%。该方法形成热源梯级利用标准化设计,持续助力采油厂零化石油田建设,打造无烟站场。

关键词：余热利用清洁替代 n级梯度换热设计方法标准化

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New Discovery of the Devonian Orthoclase Granite of Nenjiang–Heihe Structural belt, China and its Zircon U-Pb Data

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Acta Geologica Sinica(English Edition) 2018年第2期92卷 874-875页

作者： YANG Fan NA Fuchao zhang guangyu WANG Yan FU Junyu SUN Wei CHEN Jingsheng LI Bin LIU Miao PANG Xuejiao SHI Yi SHI Lu College of Earth Sciences Jilin University Shenyang Geological Survey Center China Geological Survey Key Laboratory of Mineral Resources Evaluation in Northeast Asia Ministry of Land and Resources of China

Objective The Nenjiang-Heihe structural belt is located in the eastern Xing＇anling Mongolian Orogenic Belt between the Songnen block and Xiang＇an block. This structural belt has long been the focus of geological scholars （Miao Laicheng et al., 2003; Liang Chenyue et al., 2011; Li Chao et al., 2017）, which has complex geological condition, strong metamorphism and deformation and serious vegetation cover. There is a great dispute about the time limit of collage of the structural belt. In order to solve the problem, this paper reports a newly discovered Devonian orthoclase granite near Hadayang in Molidawa banner in the middle of this structural belt, which will provide evidence for the tectonic evolution of Nenjiang-Heihe structural and Xing＇anling Mongolian Orogenic Belt.

关键词： Pb ICP MS China and its Zircon U-Pb Data

Precisely controlling the twist angle of epitaxial MoS_(2)/graphene heterostructure by AFM tip manipulation

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Chinese Physics B 2022年第8期31卷 173-177页

作者： Jiahao Yuan Mengzhou Liao Zhiheng Huang Jinpeng Tian Yanbang Chu Luojun Du Wei Yang Dongxia Shi Rong Yang guangyu zhang Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China College of Semiconductors(College of Integrated Circuits Hunan UniversityChangsha 410082China Songshan Lake Materials Laboratory Dongguan 523808China Department of Control Engineering Faculty of Electrical EngineeringCzech Technical University in PragueCzech Republic

Two-dimensional(2D)moirématerials have attracted a lot of attention and opened a new research frontier of twistronics due to their novel physical *** great progress has been achieved,the inability to precisely and reproducibly manipulate the twist angle hinders the further development of ***,we demonstrated an atomic force microscope(AFM)tip manipulation method to control the interlayer twist angle of epitaxial MoS_(2)/graphene heterostructure with an ultra-high accuracy better than 0.1°.Furthermore,conductive AFM and spectroscopic characterizations were conducted to show the effects of the twist angle on moirépattern wavelength,phonons and *** work provides a technique to precisely control the twist angle of 2D moirématerials,enabling the possibility to establish the phase diagrams of moiréphysics with twist angle.

关键词： AFM tip manipulation MoS_(2)/graphene heterostructure twist angle moirésuperlattice

Weakened interlayer coupling in two-dimensional MoSe2 flakes with screw dislocations

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Nano Research 2019年第8期12卷 1900-1905页

作者： Xiangzhuo Wang Huixia Yang Rong Yang Qinsheng Wang Jingchuan Zheng Lu Qiao Xianglin Peng Yongkai Li Dongyun Chen Xiaolu Xiong Junxi Duan guangyu zhang Jie Ma Junfeng Han Wende Xiao Yugui Yao Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement (MOE) Beijing Key Lab of Nanophotonics & Ultrafine Optoelectronic Systemsand School of PhysicsBeijing Institute of TechnologyBeijing 100081China Micronano Center Beijing Institute of TechnologyBeijing 100081China Institute of Physics Chinese Academy of SciencesBeijing 100190China

The screw dislocations are intriguing defects that are often observed in natural and artificial materials. The dislocation spirals break the reflection and inversion symmetries of the lattices and modify the interlayer coupling in layer-structured materials, inducing additional complexity in layer stacking and thus novel properties in materials. Here, we report on the interlayer coupling of two-dimensional (2D) MoSe2 flakes with screw dislocations by atomic force microscopy (AFM), Raman spectra and photoluminescence (PL) spectra. By controlling the supersaturation conditions, 2D MoSe2 flakes with screw dislocations are grown on amorphous SiO2 substrates by chemical vapor deposition (CVD). AFM measurements reveal that the interlayer spacing in such 2D MoSe2 flakes with screw dislocation is slightly widened with respect to the normal AA- or AB-stacked ones due to the presence of the screw dislocations. Raman and PL spectra show that the interlayer coupling is weaker and thus the band gap is wider than that in the normal AA- or AB-stacked ones. Our work demonstrates that the interlayer coupling of 2D transition metal dichalcogenides (TMDCs) flakes can be tuned by the induction of screw dislocations, which is very helpful for developing novel catalysts and electronic devices.

关键词： transition-metal dichalcogenides molybdenum selenide screw dislocations interlayer coupling band gap

Estimation of Daily Vapor Pressure Deficit Using MODIS Potential Evapotranspiration on the Tibetan Plateau

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Journal of Resources and Ecology 2018年第5期9卷 538-544页

作者： SHEN Zhenxi SUN Wei LI Shaowei zhang Haorui FU Gang YU Chengqun zhang guangyu Lhasa Plateau Ecosystem Research Station Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China College of Resources and Environmental Sciences China Agricultural UniversityBeijing 100193China Tibet Agriculture and Animal Husbandry University LinzhiTibet 860000China

Vapor pressure deficit（VPD） is an important parameter in modelling hydrologic cycles and vegetation productivity. Meteorological stations are scarce in remote areas,which often results in imprecise estimations of VPD on the Tibetan Plateau. Moderate Resolution Imaging Spectroradiometer（MODIS） provides evapotranspiration data,which may offer the possibility of scaling up VPD estimations on the Tibetan Plateau. However,no studies thus far have estimated VPD using MODIS evapotranspiration data on the Tibetan Plateau. Therefore,this study used MODIS potential evapotranspiration（PET） to estimate VPD in alpine meadows,alpine steppes,croplands,forests and shrublands for the year,spring,summer,autumn and winter in 2000-2012. A series of root-meansquared-error（RMSE） and mean-absolute-error（MAE） values were obtained for correlating measured VPD and estimated VPD using MODIS PET data for each listed time period and vegetation type： whole year（0.98-2.15 hPa and 0.68-1.44 hPa）,spring（0.95-2.34 hPa and 0.72-1.54 hPa）,summer（1.39-2.60 hPa and 0.89-1.96 hPa）,autumn（0.78-1.93 hPa and 0.56-1.36 hPa）,winter（0.48-1.40 hPa and 0.36-0.98 hPa）,alpine steppes（0.48- 1.39 hPa and 0.36-1.00 hPa）,alpine meadows（0.58-1.39 hPa and 0.44-0.90 hPa）,croplands（1.10-2.55 hPa and 0.82-1.74 hPa）,shrublands（0.98-1.90 hPa and 0.78-1.37 hPa）,and forests（1.40-2.60 hPa and 0.98-1.96 hPa）,respectively. Therefore,MODIS PET may be used to estimate VPD,and better results may be obtained if future studies incorporate vegetation types and seasons when the VPD data are estimated using MODIS PET on the Tibetan Plateau.

关键词： alpine ecosystems MOD16A2 vegetation types seasons