检索结果-南通市图书馆

In-situ decorated cobalt phosphide cocatalyst on Hittorfs phosphorus triggering efficient photocatalytic hydrogen production

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

地方政府债务治理与企业劳动收入份额提升——基于新《预算法》实施的准自然实验

结构化学 2024年第2期43卷 13-16页

作者： Abiduweili Sikandaier yukun zhu Dongjiang Yang School of Environmental Science and Engineering State Key Laboratory of Bio-fibers and Eco-textilesQingdao UniversityQingdao266071China

Hydrogen production through semiconductor-based photocatalytic water splitting is an appropriate strategy to convert solar energy into hydrogen fuels[1].In recent years,metal-free elemental red phosphorus(RP)materials,including amorphous,fibrous,and Hittorfs phosphorus(HP)possessing moderate bandgap and bandstructure have been explored as potential visible-light-driven hydrogen evolution reaction(HER)photocatalyst[2].However,the slow charge migration capacity and sluggish surface reaction kinetics of RP materials have limited their HER efficiency to unsatisfactory *** overcome these limitations and improve the photocatalytic HER efficiency,various strategies,including building heterostructures,morphology control,and surface modification have been investigated[3].For instance,[001]-oriented HP nanorods decorated on polymeric carbon nitride exhibited excellent photocatalytic HER activity,which was attributed to accelerated photo-generated electron-holes transfer along the[001]direction of HP[4].In addition to enhancing the charge transfer ability by morphology regu-lation to allow more electrons to migrate to the surface to participate in HER,loading cocatalysts on RP surface to enhance HER kinetics is another effective strategy for altering HER activity[5].

关键词： EVOLUTION

来源：评论

学校读者我要写书评

暂无评论

南方经济 2024年第2期 1-20页

作者：武辉朱玉坤山东财经大学会计学院

文章以2009—2021年沪深A股上市公司数据为样本,以新《预算法》实施为准自然实验,检验了地方政府债务治理对企业劳动收入份额的影响。双重差分估计显示,地方政府债务治理显著提高了企业劳动收入份额,证实了地方政府债务管理体制改革有... 详细信息

文章以2009—2021年沪深A股上市公司数据为样本,以新《预算法》实施为准自然实验,检验了地方政府债务治理对企业劳动收入份额的影响。双重差分估计显示,地方政府债务治理显著提高了企业劳动收入份额,证实了地方政府债务管理体制改革有助于优化初次分配格局。上述结果在考虑内生性问题以及进行一系列稳健性检验后仍保持稳健。机制分析表明,地方政府债务治理缓解企业融资约束,进而通过要素组成效应和人力资本升级效应提升企业劳动收入份额。异质性分析发现,非国有企业、劳动密集型行业上述效应更为凸显。进一步研究发现,地方政府债务治理显著缩小了企业内部薪酬差距,普通员工劳动收入份额提升而高管劳动收入份额无显著变化。文章将地方政府债务治理的经济后果拓展到企业要素收入分配领域,强调地方政府债务治理不仅有利于缓解企业融资困境、优化要素投入和推动企业人力资本升级,而且为完善初次收入分配、增加居民收入以扩大消费、实现共同富裕奠定基础并提供决策依据。

关键词：地方政府债务治理企业劳动收入份额新《预算法》实施融资约束共同富裕

维普期刊数据库博看期刊

基于安全强化学习的电网稳控策略智能生成方法

在线全文

学校读者我要写书评

暂无评论

电力系统保护与控制 2024年第10期52卷 147-155页

作者：邱建朱煜昆张建新朱益华徐光虎涂亮中国南方电网有限责任公司广东广州510663 直流输电技术全国重点实验室(南方电网科学研究院有限责任公司) 广东广州510663 广东省新能源电力系统智能运行与控制企业重点实验室广东广州510663

新型电力系统的“双高”趋势改变了电力系统经典稳定特性,导致稳定机理更复杂,系统稳定模式更多样,因此基于典型运行方式的在线稳定控制策略面临挑战。为解决新型电力系统的功角稳定问题,提出了基于安全强化学习的稳控策略智能生成方法... 详细信息

新型电力系统的“双高”趋势改变了电力系统经典稳定特性,导致稳定机理更复杂,系统稳定模式更多样,因此基于典型运行方式的在线稳定控制策略面临挑战。为解决新型电力系统的功角稳定问题,提出了基于安全强化学习的稳控策略智能生成方法。首先,建立了电力系统稳控问题的含约束马尔可夫模型,归纳并提出了紧急控制切机动作涉及的安全约束。其次,为了提高对于电网暂态响应的时空特征提取能力,构建了基于图卷积层和长短期记忆单元的特征感知网络。然后,为了提高稳控策略智能体的训练效率,提出了基于内嵌领域知识约束的近端策略优化算法稳控策略训练框架。最后,在IEEE 39节点系统和某实际电网中进行测试验证。结果表明,所提方法能够根据系统运行状态和故障响应自适应生成切机稳控策略,其决策效果和效率均优于现有的稳控策略。

关键词：稳控策略安全强化学习时空特征领域知识

Singularly perturbed bifurcation subsystem and its application in power systems

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2008年第4期19卷 752-757页

作者： An Yichun Zhang Qingling zhu yukun Zhang Yan Inst. of Systems Science Northeastern Univ. Shenyang 110004 P. R. China Air Force Command Coll. Beijing 100097 P. R. China

The singularly perturbed bifurcation subsystem is described, and the test conditions of subsystem persistence are deduced. By use of fast and slow reduced subsystem model, the result does not require performing nonlinear transformation. Moreover, it is shown and proved that the persistence of the periodic orbits for Hopf bifurcation in the reduced model through center manifold. Van der Pol oscillator circuit is given to illustrate the persistence of bifurcation subsystems with the full dynamic system.

关键词： bifurcation subsystem persistence singular perturbation center manifold saddle-node bifurcation Hopf bifurcation.

基于时序卷积残差网络和鹈鹕优化算法的新能源电网安全稳定控制方法

在线全文

学校读者我要写书评

暂无评论

可再生能源 2024年第6期42卷 845-852页

作者：张建新邱建朱煜昆朱益华杨欢欢徐光虎涂亮中国南方电网有限责任公司广东广州510663 直流输电技术全国重点实验室(南方电网科学研究院有限责任公司) 广东广州510663 广东省新能源电力系统智能运行与控制企业重点实验室广东广州510663

随着“双碳”目标的推进,随机波动的新能源接入电网的规模和容量日益提升,严重影响电网的安全稳定运行。针对大干扰故障电压稳定控制问题,文章提出了一种基于时序卷积残差网络和鹈鹕优化算法的新能源电网电压安全稳定控制策略。首先,利... 详细信息

随着“双碳”目标的推进,随机波动的新能源接入电网的规模和容量日益提升,严重影响电网的安全稳定运行。针对大干扰故障电压稳定控制问题,文章提出了一种基于时序卷积残差网络和鹈鹕优化算法的新能源电网电压安全稳定控制策略。首先,利用时序卷积信息损失少、感受野宽以及残差网络深层特征提取能力强的优势,构建基于时序卷积残差网络的电压稳定预测模型,映射出敏感节点电压时序特征和电压稳定之间的关系;其次,构建电压稳定控制模型,利用鹈鹕优化算法收敛速度快、搜索能力强的优势求解控制模型,得出最佳切机和切负荷动作措施;最后,进行了仿真验证。验证结果表明,所提方法提高了新能源电网电压安全稳定预测的准确性,通过最佳的电压稳定控制策略提高了电网故障后的安全稳定运行水平。

关键词：新能源大干扰故障时序卷积残差网络鹈鹕优化算法安全稳定控制

A review on nanoconfinement engineering of red phosphorus for enhanced Li/Na/K-ion storage performances

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第10期30卷 531-552,I0014页

作者： Yuanyuan Sun Fanyou Zeng yukun zhu Ping Lu Dongjiang Yang School of Environmental Science and Engineering State Key Laboratory of Bio-fibers and Eco-textilesShandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological TextilesQingdao UniversityQingdao 266071ShandongChina Nanomaterial&Electrocatalysis Laboratory College of Materials Science and EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina Queensland Micro-and Nanotechnology Centre(QMNC) Griffith UniversityNathanBrisbaneQueensland 4111Australia

Secondary batteries are widely used in energy storage *** obtain high-performance batteries,the development and utilization of electrode materials with cheap price and ideal theoretical gravimetric and volumetric specific capacities have become particularly *** abundant and low-cost red phosphorus(RP)is recognized as an anode material with great promise because it has a theoretical capacity of 2596 mA h g^(-1) in lithium-ion batteries(LIBs)and sodium-ion batteries(SIBs).However,owing to the inferior discharging,the capacity of pure RP has a fast *** of RP nanoparticles within porous carbon framework is one of the efficient methods to overcome these *** this review,we introduce the recent progress of RP confinement into carbon matrix as an energy storage anode material in LIBs,SIBs and potassium-ion batteries(PIBs).The synthetic strategies,lithiation/sodia tion/potassiation mechanism,and the electrochemical performances of RP/carbon composites(RP/C)with kinds of designed structures and P-C and P-O-C bond by kinds of methods are ***,the challenges and perspectives of RP faced in the application development as anodes for LIBs/SIBs/PIBs are *** review will strengthen the understanding of composites of RP nanoparticles in porous carbon materials and aid researchers to carry out future work rationally.

关键词： Red phosphorus Anodes Nanoconfinement Carbon materials Energy storage

Ternary red phosphorus/CoP2/SiO2 microsphere boosts visible-light-driven photocatalytic hydrogen evolution from pure water splitting

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第30期125卷 59-66页

作者： Chen Yang yukun zhu Yiming Liu Hongwei Wang Dongjiang Yang School of Environmental Science and Engineering State Key Laboratory of Bio-fibers and Eco-textilesShandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological TextilesQingdao UniversityQingdao 266071China College of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China

Red phosphorus(RP) is a promising visible-light-driven semiconductor for photocatalytic hydrogen evolution,but the activity is restricted due to the rapid charge carrier recombination and sluggish surface reaction ***,cobalt phosphide(CoP_(2)) modified RP heterostructure was developed by in situ phosphorization of cobalt oxide from phosphorus *** tuning the amounts of CoP_(2) in the heterostructure,the optimized hybrid exhibited a HER rate reaching 11.79 μmol h^(-1) under visible light illumination,which is 3.5 times higher than that of the RP with Pt as *** was experimentally indicated that the intimate interaction between CoP_(2) and RP gave rise to improved visible light absorption and accelerated photogenerated electron-holes ***,the CoP_(2) as a noble-metal-free cocatalyst could promote the surface hydrogen evolution reaction,which synergetic benefited the photocatalytic hydrogen production activity.

关键词： Red phosphorus Cobalt phosphide Heterostructure Photocatalytic hydrogen evolution

光伏并网稳定控制系统设计方法及其在南方电网的应用与实践

在线全文

学校读者我要写书评

暂无评论

南方电网技术 2024年第7期18卷 139-147页

作者：邱建张建新朱煜昆朱泽翔常东旭朱益华杨欢欢徐光虎付超高琴中国南方电网有限责任公司广州510663 直流输电技术全国重点实验室(南方电网科学研究院) 广州510663 广东省新能源电力系统智能运行与控制企业重点实验室广州510663

随着新型电力系统的建设,电网的“双高”将显著影响电力系统的运行与稳定特性。因此提出了一种光伏并网稳控系统的标准化设计方案,包括组网通信架构、软硬件功能配置、出口方式设计和协调配合方法等,解决了目前光伏稳控出口仅能在“全... 详细信息

随着新型电力系统的建设,电网的“双高”将显著影响电力系统的运行与稳定特性。因此提出了一种光伏并网稳控系统的标准化设计方案,包括组网通信架构、软硬件功能配置、出口方式设计和协调配合方法等,解决了目前光伏稳控出口仅能在“全站整切”或“全站整调”中人为二选一的局限性。该方案已成功应用于南方电网首个水光互补项目,RTDS仿真试验结果表明,所设计的稳控系统实现了功率快速精细化调节,通信延时短,通信组网可靠性高,能够适应实际电网的各种稳定性需求。

关键词：光伏并网稳控系统标准化设计功率快调 RTDS仿真

Spontaneous polarization enhanced bismuth ferrate photoelectrode:fabrication and boosted photoelectrochemical water splitting property

在线全文

学校读者我要写书评

暂无评论

Frontiers in Energy 2021年第3期15卷 781-790页

作者： Yan ZHANG yukun zhu Yanhua PENG Xiaolong YANG Jian LIU Wei JIAO Jianqiang YU School of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Laboratory of Clean Energy Chemistry and Materials Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

In this paper,the fabrication of a highly orientated Bi_(2)Fe_(4)O_(9)(BFO)photoelectrode in the presence of two-dimensional(2D)graphene oxide(GO)was *** was found that the GO can be used as a template for controlling the growth of BFO,and the nanoplate composites of BFO/reduced graphene oxide(RGO)with a high orientation can be *** thickness of the nanoplates became thinner as the ratio of GO *** a result,the ferroelectric spontaneous polarization unit arranges itself in the space in a periodic manner,leading to the formation of a polarization field along a special ***,the created built-in electric field of the nanoplate composites of BFO/RGO is improved upon the increase of the amount of *** expected,carrier separation is enhanced by the built-in electric field,therefore substantially enhancing the photoelectrochemical(PEC)activity of water splitting compared to pure BFO under the irradiation of visible-light.

关键词： bismuth ferrate ferroelectric polarisation photoelectrochemical(PEC)water splitting graphene oxide(GO) high orientation