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油气田非金属管道失效预测及防控技术研究进展

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化工进展 2024年第3期43卷 1118-1132页

作者：张玉红李轩宇冯春健马春迅张晨周洋洋毕海胜青岛科技大学机电工程学院山东青岛266061 中国石油集团渤海石油装备制造有限公司辽河热采机械制造分公司辽宁盘锦124209 中石化石油工程设计有限公司山东东营257000

油气田金属管道腐蚀穿孔风险日趋严重,管道泄漏事故时有发生,玻璃钢管、钢骨架增强聚乙烯复合管、柔性复合管等非金属管道以其良好的耐蚀性和适用性在油气田开发生产系统中逐渐受到青睐。然而,由于管道在长期服役过程中遭受内外压载荷... 详细信息

油气田金属管道腐蚀穿孔风险日趋严重,管道泄漏事故时有发生,玻璃钢管、钢骨架增强聚乙烯复合管、柔性复合管等非金属管道以其良好的耐蚀性和适用性在油气田开发生产系统中逐渐受到青睐。然而,由于管道在长期服役过程中遭受内外压载荷、介质腐蚀等老化作用,随之而来的诸如基体开裂、管体脆断、纤维/基体界面脱黏、层间分离等各种失效问题亟待解决。基于此现状,文章综述了油气田常用非金属管道特点、应用、失效原因,以及非金属管道探测定位、无损检测技术、风险评估和寿命预测方法,针对非金属管道损伤失效的预防在管道制造、施工、运行、应用、维修及关键技术等方面提出了相关建议,并对非金属管道失效预防技术攻关方面进行展望,为非金属油气管道失效预测方法及其防控技术的相关研究提供有效支撑。

关键词：非金属管道失效检测技术风险评估预测方法

Enhancing gene editing efficiency for cells by CRISPR/Cas9 system-loaded multilayered nanoparticles assembled via microfluidics

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Chinese Journal of Chemical Engineering 2021年第10期34卷 216-220页

作者： xuanyu li Qiang Feng Ziwei Han Xingyu Jiang Shenzhen Bay Laboratory Department of Biomedical EngineeringSouthern University of Science and TechnologyShenzhen 518055China

Most non-viral carriers for in vitro delivery of nucleic acids suffer from low efficiency of introducing m RNA and other nucleic acids,especially large m ***9 protein is the nuclease part of the powerful gene-editing tool,CRISPR/Cas9 system,Cas9 m RNA is particularly large,thus presents a big challenge for *** assembled a multilayered biodegradable nanocarrier to load Cas9 m RNA inside to protect Cas9 m RNA from *** used a microfluidic chip to synthesize a small,positively charged,and degradable core to attract negatively charged Cas9 m *** microfluidic assembly allows the core to be small enough to incorporate into a cationic *** multilayered nanocarriers elevated the delivery efficiency of Cas9 m RNA by over 2 folds and increased the expression by over 5 folds compared to commercially used non-viral *** addition,the multilayered nanocarriers do not require reduced serum medium for *** using the standard complete medium for transfection,the multilayered nanocarriers could increase the expression of Cas9 m RNA by over 15 folds compared to commercially used non-viral *** co-delivery of Cas9 m RNA and sg RNA via LRC elevated the gene-editing efficiency by 3 folds compared to that via commercially used non-viral *** on the higher transfection efficiency of Cas9 m RNA/sg RNA than commercially used non-viral carriers,these multilayered nanocarriers may have a good prospect as efficient commercial delivery carriers for Cas9 m RNA/sg RNA and other nucleic acids.

关键词： Nanotechnology Biomedical engineering Microfluidics CRISPR/Cas9 system Poly(lactic-co-glycolic acid)

Enhanced piezoelectric performance of Cr/Ta non-equivalent co-doped Bi_(4)Ti_(3)O_(12)-based high-temperature piezoceramics

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Journal of Advanced Ceramics 2024年第3期13卷 263-271页

作者： xuanyu Chen Ziqi Ma Bin li Yejing Dai School of Materials Sun Yat-sen UniversityShenzhen 518107China

In this study,(Cr_(1/3)/Ta_(2/3))non-equivalent co-doped Bi_(4)Ti_(3)O_(12)(BIT)ceramics were prepared to solve the problem that high piezoelectric performance,high Curie temperature,and high-temperature resistivity could not be achieved simultaneously in BIT-based ceramics.A series of Bi_(4)Ti_(3-x)(Cr_(1/3)Ta_(2/3))_(x)O_(12)(x=0-0.04)ceramics were synthesized by the solid-state reaction *** phase structure,microstructure,piezoelectric performance,and conductive mechanism of the samples were systematically *** B-site non-equivalent co-doping strategy combining high-valence Ta^(5+)and low-valence Cr^(3+)significantly enhances electrical properties due to a decrease in oxygen vacancy ***_(4)Ti_(2.97)(Cr_(1/3)Ta_(2/3))_(0.03)O_(12)ceramics exhibit a high piezoelectric coefficient(d_(33)=26 pC·N^(-1))and a high Curie temperature(TC=687℃).Moreover,the significantly increased resistivity(ρ=2.8×10^(6)Ω·cm at 500℃)and good piezoelectric stability up to 600℃are also obtained for this *** the results demonstrate that Cr/Ta co-doped BIT-based ceramics have great potential to be applied in high-temperature piezoelectric applications.

关键词： high temperature piezoelectricity co-doped Bi_(4)Ti_(3)O_(12)(BIT)

Proton‑Prompted ligand Exchange to Achieve High‑Efficiency CsPbI_(3) Quantum Dot light‑Emitting Diodes

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Nano-Micro Letters 2024年第6期16卷 53-62页

作者： Yanming li Ming Deng xuanyu Zhang Lei Qian Chaoyu Xiang Laboratory of Advanced Nano‑Optoelectronic Materials and Devices Qianwan Institute of CNITECHNingbo 315300People’s Republic of China Division of Functional Materials and Nanodevices Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices Ningbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201People’s Republic of China Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211ZhejiangPeople’s Republic of China University of Nottingham Ningbo China Ningbo 315100People’s Republic of China

CsPbI_(3)perovskite quantum dots(QDs)are ideal materials for the next generation of red light-emitting ***,the low phase stability of CsPbI_(3)QDs and long-chain insulating capping ligands hinder the improvement of device *** in-situ ligand replacement and ligand exchange after synthesis were often difficult to ***,we proposed a new ligand exchange strategy using a proton-prompted insitu exchange of short 5-aminopentanoic acid ligands with long-chain oleic acid and oleylamine ligands to obtain stable small-size CsPbI_(3)*** exchange strategy maintained the size and morphology of CsPbI_(3)QDs and improved the optical properties and the conductivity of CsPbI_(3)QDs *** a result,high-efficiency red QD-based light-emitting diodes with an emission wavelength of 645 nm demonstrated a record maximum external quantum efficiency of 24.45%and an operational half-life of 10.79 h.

关键词： CsPbI_(3) perovskite quantum dots light-emitting diodes ligand exchange Proton-prompted in-situ exchange

Nanoliposome-encapsulated caged-GABA for modulating neural electrophysiological activity with simultaneous detection by microelectrode arrays

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Nano Research 2020年第6期13卷 1756-1763页

作者： Jingyu Xie Yilin Song Yuchuan Dai Ziyue li Fei Gao xuanyu li Guihua Xiao Yu Zhang Hao Wang Zeying Lu Xingyu Jiang Wenfu Zheng Xinxia Cai State Key Laboratory of Transducer Technology Institute of ElectronicsChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China Beijing Engineering Research Center for BioNanotechnology CAS Key Laboratory for Biological Effects of Nanomaterials and NanosafetyCAS Center for Excellence in NanoscienceNational Center for NanoScience and TechnologyBeijing100190China Department of Biomedical Engineering Southern University of Science and TechnologyShenzhen518055China

Effective and precise neural modulation with real-time detection in the brain is of great importance and represents a significant ***-encapsulated light-sensitive compounds have excellent characteristics such as high temporal and spatial resolution,delayed drug clearance,and restricted drug biodistribution for neural *** this study,we developed a nanoliposome-based delivery system for ruthenium-based caged GABA compounds(Nanolipo-Ru)to modulate neural activity and allow for real-time monitoring using the microelectrode arrays(MEAs).The Nanolipo-Ru nanoparticles had an average size of 134.10±4.30 nm and exhibited excellent stability for seven *** the in vivo experiment in the rat,release of GABA by Nanolipo-Ru under blue light illumination resulted in an average firing rate reduction in interneurons and pyramidal neurons in the same brain region of 79.4%and 81.6%,***,the average power of local field potentials in the 0–15 Hz range degraded from 4.34 to 0.85 *** addition,the Nanolipo-Ru nanoparticles have the potential to provide more flexible timing of modulation than unencapsulated RuBi-GABA in the *** results indicated that Nanolipo-Ru could be an effective platform for regulating neuronal ***,nanoliposomes with appropriate modifications would render promising utilities for targeting of specific types of neurons in the future.

关键词： neural modulation nanoliposome microelectrode array light-sensitive drug

服务型海关视角下饲用高粱进境关务优化与对策研究

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海关与经贸研究 2024年第2期45卷 41-51页

作者：李轩羽刘瑞嘉龚杰李袁志于思源焦彬彬凌霖上海海关学院上海海关学院海关检验检疫系

饲用高粱是我国重要的饲用粮食之一,保障饲用高粱进口贸易稳健运行是目前我国粮食安全面临的重要挑战。关务作为粮食供应链中的关键环节,与海关有大量交集。本文选取饲用高粱进口的关务问题进行研究,着重分析通关流程,强化海关与企业的... 详细信息

饲用高粱是我国重要的饲用粮食之一,保障饲用高粱进口贸易稳健运行是目前我国粮食安全面临的重要挑战。关务作为粮食供应链中的关键环节,与海关有大量交集。本文选取饲用高粱进口的关务问题进行研究,着重分析通关流程,强化海关与企业的双向互动,推动建设服务型海关,以海关职能推动国家高水平对外开放,构建新发展格局,并通过国内大循环促进我国进出口贸易行业的高质量发展。

关键词：关务优化海关服务饲用高粱通关流程

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Collaborative robust dispatch of electricity and carbon under carbon allowance trading market

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Global Energy Interconnection 2024年第4期7卷 391-401页

作者： Songyu Wu Xiaoyan Qi Xiang li xuanyu liu Bolin Tong Feiyu Zhang Zhong Zhang Electric Power Research Institute of State Grid liaoning Electric Power Co. Shenyang 110006P.R.China School of Electrical Engineering Dalian University of TechnologyDalian 116024P.R.China

The launch of the carbon-allowance trading market has changed the cost structure of the power *** is an asynchronous coupling mechanism between the carbon-allowance-trading market and the day-ahead power-system *** this study,a data-driven model of the uncertainty in the annual carbon price was ***,a collaborative,robust dispatch model was constructed considering the annual uncertainty of the carbon price and the daily uncertainty of renewable-energy *** model is solved using the column-and-constraint generation *** operation and cost model of a carbon-capture power plant(CCPP)that couples the carbon market and the economic operation of the power system is also *** critical,profitable conditions for the economic operation of the CCPP were *** studies demonstrated that the proposed low-carbon,robust dispatch model reduced carbon emissions by 2.67%compared with the traditional,economic,dispatch *** total fuel cost of generation decreases with decreasing,conservative,carbon-price-uncertainty levels,while total carbon emissions continue to *** the carbon-quota coefficient decreases,the system dispatch tends to increase low-carbon unit *** study can provide important guidance for carbon-market design and the low-carbon-dispatch selection strategies.

关键词： Asynchronous coupling mechanism Collaborative robust optimization Carbon price uncertainty Carbon capture power plant Low carbon dispatch

基于有限元仿真分析的卫星低频电缆传输特性研究

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光纤与电缆及其应用技术 2024年第3期 9-13,23页

作者：王赫余许晨航赵冰欣吴乐群李轩宇丁乃昭刘雨双中国空间技术研究院遥感卫星总体部北京100094 中国电子科技集团公司第二十三研究所上海201900

现有卫星低频电缆网主要基于经验和规范进行设计,无法有效保证系统运行的可靠性,致使电缆信号传输问题反复出现。为此,基于有限元分析建立了电缆信号传输的物理仿真模型,研究了卫星低频电缆传输特性。以仿真和试验相结合的方式研究了电... 详细信息

现有卫星低频电缆网主要基于经验和规范进行设计,无法有效保证系统运行的可靠性,致使电缆信号传输问题反复出现。为此,基于有限元分析建立了电缆信号传输的物理仿真模型,研究了卫星低频电缆传输特性。以仿真和试验相结合的方式研究了电缆导体规格、特征阻抗、屏蔽结构等对电缆传输性能的影响,在设计阶段即可有效预测和预防电缆信号传输问题。将有限元仿真分析和试验验证引入卫星低频电缆网设计,从理论上和实际上丰富了设计方法,形成有效的设计体系,提高设计水平,增加设计可靠性。

关键词：卫星低频电缆电缆传输性能有限元分析仿真模型

Mn-based cathode materials for rechargeable batteries

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Science China Chemistry 2024年第1期67卷 87-105页

作者： Xu Zhang Shiqi liu Boya Wang Guoqing Wang Haozhe Du xuanyu Wang Haidong Zhang Shu Zhao lin Wang Haijun Yu Institute of Advanced Battery Materials and Devices Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Key Laboratory of Advanced Functional Materials Ministry of EducationBeijing University of TechnologyBeijing 100124China Create Energy&Benefit Future Co.Ltd. Beijing 100176China

The rapid expansion of renewable energies asks for great progress of energy-storage technologies for sustainable energy supplies,which raises the compelling demand of high-performance rechargeable *** satisfy the huge demand from the coming energy-storage market,the resource and cost-effectiveness of rechargeable batteries become more and more ***(Mn)as a key transition element with advantages including high abundance,low cost,and low toxicity derives various kinds(spinels,layered oxides,polyanions,Prussian blue analogs,etc.)of high-performance Mn-based electrode materials,especially cathodes,for rechargeable batteries ranging from li-ion batteries,Na-ion batteries,aqueous batteries,to multivalent metal-ion *** is anticipated that Mn-based materials with Mn as the major transition-metal element will constitute a flourishing family of Mn-based rechargeable batteries(Mn RBs)for large-scale and differentiated energy-storage *** the other hand,several critical issues including Jahn-Teller effect,Mn dissolution,and O release greatly hinder the pace of Mn RBs,which require extensive material optimizations and battery/system *** review aims to provide an investigation about Mn-based materials and batteries for the coming energy-storage demands,with compelling issues and challenges that must be overcome.

关键词： manganese cathode materials Mn-based rechargeable batteries energy storage