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Better use of experience from other reservoirs for accurate production forecasting by learn-to-learn method

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Petroleum Science 2024年第1期21卷 716-728页

作者： Hao-Chen Wang Kai Zhang Nancy Chen Wen-Sheng Zhou Chen Liu Ji-Fu Wang Li-Ming Zhang Zhi-gang Yu Shi-ti Cui Mei-Chun Yang China University of Petroleum(East China) 66 Changjiang West RoadQingdao West Coast New AreaQingdao266580ShandongChina University of Calgary 2500 University Dr NWCalgaryT2N 1N4AlbertaCanada Qingdao University of Technology Qingdao266071ShandongChina State Key Laboratory of Offshore Oil Exploitation Beijing100028China CNOOC Research Institute Ltd. Beijing100028China CNPC Tarim Oilfield Branch company Korla841000XinjiangChina National Engineering Laboratory for Exploration and Development of Low-Permeability Oil and gas Fields Xi'an710000ShaanxiChina Sinopec Matrix co. LTDQingdao266000ShandongChina

To assess whether a development strategy will be profitable enough,production forecasting is a crucial and difficult step in the *** development history of other reservoirs in the same class tends to be studied to make predictions ***,the permeability field,well patterns,and development regime must all be similar for two reservoirs to be considered in the same *** results in very few available experiences from other reservoirs even though there is a lot of historical information on numerous reservoirs because it is difficult to find such similar *** paper proposes a learn-to-learn method,which can better utilize a vast amount of historical data from various ***,the proposed method first learns how to learn samples before directly learning rules in ***,by utilizing gradients from networks with independent parameters and copied structure in each class of reservoirs,the proposed network obtains the optimal shared initial parameters which are regarded as transferable information across different *** on that,the network is able to predict future production indices for the target reservoir by only training with very limited samples collected from reservoirs in the same *** cases further demonstrate its superiority in accuracy to other widely-used network methods.

关键词： Production forecasting Multiple patterns Few-shot learning Transfer learning

Metal-N_(4)model single‐atom catalyst with electroneutral quadri‐pyridine macrocyclic ligand for co_(2)electroreduction

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Carbon Energy 2024年第8期6卷 122-133页

作者： Jian‐Zhao Peng Yin‐Long Li Yao‐ti Cheng Fu‐Zhi Li Bo Cao Qing Wang Xian Yue guo‐Tao Lai Yang‐gang Wang Jun gu Department of Chemistry Southern University of Science and TechnologyShenzhenGuangdongChina Institute for Catalysis Hokkaido UniversitySapporoJapan

Metal–N–C single‐atom catalysts,mostly prepared from pyrolysis of metalorganic precursors,are widely used in heterogeneous *** metal sites with diverse local structures coexist in this type of material and it is challenging to characterize the local structure,a reliable structure–property relationship is difficult to *** macrocyclic complexes adsorbed on carbon support are well‐defined models to mimic the singleatom ***–N_(4)site with four electroneutral pyridine‐type ligands embedded in a graphene layer is the most commonly proposed structure of the active site of single‐atom catalysts,but its molecular counterpart has not been *** this work,we synthesized the conjugated macrocyclic complexes with a metal center(co,Fe,or Ni)coordinated with four electroneutral pyridinic ligands as model catalysts for co_(2)*** comparison,the complexes with anionic quadri‐pyridine macrocyclic ligand were also *** co complex with the electroneutral ligand expressed a turnover frequency of co formation more than an order of magnitude higher than that of the co complex with the anionic *** ab initio molecular dynamics simulations based on the well‐defined structures of the model catalysts indicate that the co complex with the electroneutral ligand possesses a stronger ability to mediate electron transfer from carbon to co_(2).

关键词： ab initio molecular dynamics co_(2)reduction electrocatalysis model catalyst single‐atom catalyst

Reinforcing oxygen electrocatalytic activity via selective dualphase heterointerface engineering for rechargeable Zn-air batteries

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Rare Metals 2024年第4期43卷 1524-1536页

作者： Chao Cheng Chuang Zhi Zhong-ti Sun Yong-Qiang Ming ting-ting Xiang Qing-Chao Zhu Zi-Rui Wu Bing Li Yi Li Cheng Jin Yong Cao Juan Yang School of Materials Science and Engineering Jiangsu UniversityZhenjiang212013China Faculty of Material Science and Engineering Kunming University of Science and TechnologyKunming650093China

Dual-phase heterointerface electrocatalysts(DPHE)constructed by oxygen reduction reaction(ORR)-and oxygen evolution reaction(OER)-active elements exhibit excellent bifunctional activity and long-term durability due to the abundant interface exposure and synergistic catalytic ***,low-dimensional N-doped graphene nanoribbons(N-gNRs)coupling with ultrathin coO nanocomposites(N-gNRs/coO)were controllably fabricated through a facile two-step approach using synthesized co(OH)_2 nanosheet as coO *** functional theory(DFT)calculations and experimental characterizations prove that the formation of interface between N-gNRs and coO can induce local charge redistribution,contributing to the improvement of catalytic activity and *** optimal N-gNRs/coO DPHE possesses hierarchically porous architectures and presents outstanding bifunctional activities with a small potential gap of 0.729 V between the potential at 10 mA·cm^(-2)for OER and the halfwave potential for ORR,which outperforms Pt/C+IrO_(2)and the majority of noble-metal-free bifunctional ***-and solid-state rechargeable Zn-air batteries assembled with N-gNRs/coO as the cathode also display high peak power density and fantastic cycle stability,superior to that of benchmark Pt/C+IrO_(2)*** is anticipated to offer significant benefits toward high activity,stability and mechanical flexibility bifunctional oxygen electrocatalysts for rechargeable Zn-air batteries.

关键词： Interface engineering graphene nanoribbons coO Bifunctional electrocatalyst Zn-air batteries

基于密度泛函的C_(4)F_(7)N/N_(2)/O_(2)三元混合气体击穿及分解特性分析

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工程科学与技术 2024年第5期56卷 127-135页

作者：刘提陈聪吴震陈桓国网浙江省电力有限公司建设分公司浙江杭州310016

C_(4)F_(7)N具有优异的绝缘性能和环保特性,是有潜力替代SF_(6)的环保型绝缘气体。目前,主要采用co_(2)作为C_(4)F_(7)N的缓冲气体,其含量一般大于90%,由于co_(2)为温室气体,将co_(2)替换为N_(2)后与C_(4)F_(7)N混合,会使混合气体环保... 详细信息

C_(4)F_(7)N具有优异的绝缘性能和环保特性,是有潜力替代SF_(6)的环保型绝缘气体。目前,主要采用co_(2)作为C_(4)F_(7)N的缓冲气体,其含量一般大于90%,由于co_(2)为温室气体,将co_(2)替换为N_(2)后与C_(4)F_(7)N混合,会使混合气体环保性大大提升。虽然,C_(4)F_(7)N/N_(2)混合气体在放电时可能有固体碳析出情况,严重影响气体绝缘设备正常运行,但是,O_(2)的加入能够改善C_(4)F_(7)N/N_(2)二元混合气体的击穿特性,抑制分解产物的产生。为此,本文基于密度泛函理论计算了O_(2)及C_(4)F_(7)N/N_(2)混合气体的电子亲和能、电负性、不同分子数量的O_(2)和N_(2)与C_(4)F_(7)N气体之间的相互作用能及电荷转移量,得出了C_(4)F_(7)N分子的福井函数、C_(4)F_(7)N/N_(2)/O_(2)各气体分子化学键的解离能,分析了C_(4)F_(7)N与O_(2)放电分解涉及的自由基反应过程,从微观角度研究O_(2)对C_(4)F_(7)N/N_(2)混合气体击穿特性及分解特性的影响。结果表明:相较于N_(2),O_(2)的电子亲和能及电负性更强,加入O_(2)有助于提高C_(4)F_(7)N/N_(2)混合气体的击穿电压。O_(2)-C_(4)F_(7)N的相互作用能约为N_(2)-C_(4)F_(7)N相互作用能的5倍;随着缓冲气体分子数量的增加,缓冲气体与C_(4)F_(7)N之间电荷转移量逐渐增加,使得C_(4)F_(7)N/O_(2)体系中C_(4)F_(7)N得到电子,而C_(4)F_(7)N/N_(2)体系中C_(4)F_(7)N失去电子。C_(4)F_(7)N未发生放电分解时,缓冲气体与C_(4)F_(7)N分子间主要以物理作用为主,O_(2)的加入消耗C_(4)F_(7)N分解产生的CF_(2)·与C·自由基,减少金属电极表面碳单质的附着。综上,O_(2)的加入能够减少碰撞电离,消耗C_(4)F_(7)N分解产生的自由基,抑制分解产物的产生,改善三元混合气体C_(4)F_(7)N/N_(2)/O_(2)的击穿特性及分解特性。

关键词： C_(4)F_(7)N/N_(2)混合气体密度泛函理论 O_(2) 击穿特性分解特性

基于企业战略管理的人力资源战略规划策略探索

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市场周刊 2024年第14期37卷 171-174页

作者：张媞山东天业国际能源有限公司山东济南250001

在当今竞争激烈的商业环境中,企业战略管理的重要性日益凸显。基于此,文章先阐述企业人力资源管理、企业战略管理的概念,说明人力资源战略规划在企业战略管理中的作用,然后分析企业战略管理和人力资源规划之间的关联以及当下企业人力资... 详细信息

在当今竞争激烈的商业环境中,企业战略管理的重要性日益凸显。基于此,文章先阐述企业人力资源管理、企业战略管理的概念,说明人力资源战略规划在企业战略管理中的作用,然后分析企业战略管理和人力资源规划之间的关联以及当下企业人力资源管理存在的主要问题,最后进行基于企业战略管理的人力资源战略规划策略的探讨。

关键词：企业战略管理人力资源战略规划

Ultra-Thin Layer HTaMoO6 Catalyst for the Upgrading of Carbohydrates into 5-Hydroxymethylfurfural

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Ultra-Thin Layer HTaMoO6 Catalyst for the Upgrading of Carbo...

第4届分子科学博士后学术年会

作者： Lei Zhang Bingfeng Chen ti Zhou Xiaomeng Cheng Minghua Dong Ye Liu Huizhen Liu Qingling Xu Buxing Han School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences Beijing National Laboratory for Molecular Sciences CAS Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesCenter for Carbon Neutral ChemistryInstitute of ChemistryChinese Academy of Sciences Shandong IFT Science & Technology co LTD.

The conversion of carbohydrates into 5-hydroxymethylfurfural（HMF）, a vital and valuable platform chemical, is sought after in industrial applications but poses significant challenges. In this research, we engineered an ultra-thin layer HTaMoO catalyst using ball-milling/liquid-exfoliation technique, demonstrating its efficiency in catalyzing the transformation of carbohydrates to HMF. In contrast to the conventional method utilizing tetra（n-butylammonium） hydroxide as the intercalation agent, the ball-milling/liquid-exfoliation technique not only reduces catalyst preparation time（within 12 hours） but also enhances the efficient intercalation, leading to the formation of an ultra-thin layer structure. The resulting catalyst exhibits high total acidity, a favorable Br?nsted/Lewis acid ratio, and improved accessibility of active sites due to the thin layer structure post-exfoliation. compared with bulk LiTaMoO, the ultrathin layer HTaMoO catalyst enables complete fructose dehydration with an HMF yield reaching 89.1% under moderate reaction conditions（120 ℃, 1 hour） and 47.2% yield of HMF is obtained from sucrose at 130 ℃. This work provides a new method to fabricate the solid acid for the transformation of carbohydrates.

关键词： High speed ball-milling Liquid-exfoliation Synergistic catalysis Ultra-thin layer nanosheets 5-hydroxymethylfurfural

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多无人机协同编队控制及试飞验证

航空学报 2024年第17期45卷 319-330页

作者：赵创新遆好建李照宏冯山杨述星唐鹏成都飞机工业(集团)有限责任公司成都610091

针对固定翼无人机(UAV)多机协同编队飞行控制与管理,提出适用于大规模编队组网的控制方法与状态管理框架。首先,给出了通用化的队形设计方法,利用最小编队单元可以组合设计任意队形,基于开放式的多机自组网架构,构建了“大队长-小队长-... 详细信息

针对固定翼无人机(UAV)多机协同编队飞行控制与管理,提出适用于大规模编队组网的控制方法与状态管理框架。首先,给出了通用化的队形设计方法,利用最小编队单元可以组合设计任意队形,基于开放式的多机自组网架构,构建了“大队长-小队长-僚机”三级动态组网体系。其次,建立起长机-僚机编队运动方程,针对僚机前向、横航向通道,提出了非线性编队保持控制律,理论证明了各通道对目标位置的收敛性。对于高度通道,以升降速率和高度信号为制导回路主控信号,给出了俯仰角动态调整目标值。针对多机编队解散问题,根据僚机与长机的相对位置关系,设计了滚转脱离策略,控制僚机有序解散,确保编队飞行安全。最后,基于某型缩比无人机开展了3机、4机与5机“人形”、“菱形”队形飞行试验,试验结果表明各无人机对目标位置、高度、航向及速度具有良好的跟踪性能,队形保持具有较强的鲁棒性能,多机协同飞行实现了从编队集结、保持、重构至编队解散、单机着陆全过程的控制与管理。

关键词：无人机动态组网编队控制编队保持非线性控制

无损检测技术在高速公路路基路面测定中的应用

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工程建设与设计 2024年第1期 186-188页

作者：窦体超云南交投集团云岭建设有限公司昆明650200

针对高速公路路基路面病害类型及传统检测技术的局限性,分析了频谱分析检测技术和图像检测技术,以及对精确快速定位和鉴定地下病变与异常问题的解决。结果表明,无损检测技术可以高效地定位和识别路基路面病害,提高高速公路维修的精度与... 详细信息

针对高速公路路基路面病害类型及传统检测技术的局限性,分析了频谱分析检测技术和图像检测技术,以及对精确快速定位和鉴定地下病变与异常问题的解决。结果表明,无损检测技术可以高效地定位和识别路基路面病害,提高高速公路维修的精度与效率,并准确评估已发生病害的影响范围,从而以更加科学的方式预防病害发生,具有良好的应用前景。

关键词：路基路面高速公路无损检测图像检测

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新疆伊吾县姜巴斯套组火山岩地球化学特征及构造意义

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四川地质学报 2024年第3期44卷 387-393页

作者：提振海秦彪河北省区域地质调查院(河北省地学旅游研究中心) 河北廊坊065000 新疆天道地质环境有限公司乌鲁木齐830000

通过对新疆伊吾县姜巴斯套组火山岩分布、成因与构造环境关系的调查研究,查明了该时期火山岩相从次火山相-爆发相-喷溢相-火山沉积相的分布特点;火山岩组合主要为-套岛弧相的中基性-中酸性火山碎屑岩、火山熔岩及火山沉积岩。结合该区... 详细信息

通过对新疆伊吾县姜巴斯套组火山岩分布、成因与构造环境关系的调查研究,查明了该时期火山岩相从次火山相-爆发相-喷溢相-火山沉积相的分布特点;火山岩组合主要为-套岛弧相的中基性-中酸性火山碎屑岩、火山熔岩及火山沉积岩。结合该区火山岩地球化学特征及沉积岩特征综合研究认为:研究区早石炭世早期处于大陆裂谷向大洋裂谷转变的动力学环境;到了早石炭晚期(姜巴斯套组沉积时期),研究区构造活动由伸展机制转换为挤压机制,其火山岩表现为岛弧型火山岩系列。因此,认为研究区早石炭世构造演化为一次“开”“合”构造。

关键词：火山岩成因地球化学构造环境姜巴斯套组