检索结果-南通市图书馆

Superb creep lives of Ni-based single crystal superalloy through size effects and strengthening heterostructure γ/γ' interfaces

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

National Science Open 2024年第4期 145-155页

作者： Haibo Long Yunsong zhao junbo zhao Xiaoyi Yuan Hao Fan Yushi Luo Wei Li Zibing An Shengcheng Mao Gang Liu Xiaodong Han Beijing Key Laboratory of Microstructure and Property of Advanced Materials Beijing University of Technology Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Institute of Aeronautical Materials Department of Mechanical Engineering Southern University of Science and Technology Department of Materials Science and Engineering Southern University of Science and Technology

This study presents a design strategy to enhance the high-temperature creep resistance of Ni-based superalloys. This strategy focuses on two principles:(1) minimizing the dimensions of γ/γ′ interfaces and γ channels by reducing the size of the γ′phase;(2) key alloy composition control to strengthen the heterostructure γ/γ′ interfaces. This strategy proved very effective by the designed three superalloys' prolonged creep lives. An alloy exhibits ultra-long creep life by 388 h at 1100°C/137 MPa,which runs at the highest level among those alloys without Ru addition. With Ru addition, an alloy that lasted for 748 h with a creep strain of ～6% at 1110°C/137 MPa is developed. This study provides a new route of high-temperature creep lives through heterostructure interfacial design with size effects and key alloying elements.

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

水肥调控对茶树土壤酶及土壤养分的影响

山西农业大学学报（自然科学版） 2024年第2期44卷 130-140页

作者：赵俊波胡兵辉西南林业大学生态与环境学院云南昆明650224

[目的]探究茶树土壤酶活性、土壤养分和茶树地上部分对水肥调控的响应,揭示水肥调控下土壤酶活性和土壤养分的变化规律,可为基肥施用和灌水互作下对土壤理化性质和幼龄茶树生长影响提供理论依据。[方法]采用盆栽实验方法,设置了施肥量... 详细信息

[目的]探究茶树土壤酶活性、土壤养分和茶树地上部分对水肥调控的响应,揭示水肥调控下土壤酶活性和土壤养分的变化规律,可为基肥施用和灌水互作下对土壤理化性质和幼龄茶树生长影响提供理论依据。[方法]采用盆栽实验方法,设置了施肥量和灌水量2个因素。基肥施肥量设C0(0 kg·盆^(-1))、C1(0.05 kg·盆^(-1))、C2(0.1 kg·盆^(-1))、C3(0.15 kg·盆^(-1))4个梯度。灌水量设W1(90 mL·盆^(-1))、W2(140 mL·盆^(-1))、W3(190 mL·盆^(-1))、W4(240 mL·盆^(-1))、W5(290 mL·盆^(-1))5个梯度。[结果](1)在C2W3处理下土壤蔗糖酶活性最高,在C3W4处理下的过氧化氢酶活性最高;冬季时C2W4处理下土壤养分含量最大;春季时速效钾和有效磷在C2基肥施肥下含量最高,C3基肥施肥下的碱解氮和有机质含量最大;(2)在C3处理下速效钾、碱解氮对冬春季蔗糖酶和过氧化氢酶活性影响最大;其它养分在通过速效钾影响后,多个因素共同影响不同时期的蔗糖酶和过氧化氢酶活性;(3)结合茶树地上生长指标可知,茶树在C2基肥下株高、地径增长量最大,在W4灌水时叶分枝数增长量最大。[结论]随着越冬期的结束,钾元素不需要追肥补充,而茶树因生长需要须进行氮、磷元素的追肥补充;在240 mL·株^(-1)的灌水处理下茶树地上生长指标达到最大。

关键词：基肥施肥量灌水量土壤酶土壤养分追肥补充

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

论民国赋作中的抗战书写

重庆文理学院学报（社会科学版） 2024年第1期43卷 74-83页

作者：赵俊波四川师范大学文学院四川成都610066

抗战赋从多个方面真实记录了抗战经过,反映了整个中华民族反抗外侮、争取民族与国家独立的伟大斗争,堪称赋史。与前代同类赋作不同,抗战赋慷慨激昂,充满必胜的信念。同时,抗战赋雅俗并存,充分发挥了报刊文学的宣传、鼓动功能,尤其是通... 详细信息

抗战赋从多个方面真实记录了抗战经过,反映了整个中华民族反抗外侮、争取民族与国家独立的伟大斗争,堪称赋史。与前代同类赋作不同,抗战赋慷慨激昂,充满必胜的信念。同时,抗战赋雅俗并存,充分发挥了报刊文学的宣传、鼓动功能,尤其是通俗之作,语言通俗、押韵自由、骈散随意,在一定程度上消解了赋的文体规范。以上三个方面反映了抗战赋对古代同类赋作的超越,不仅体现了抗战赋的价值,也体现了传统赋体写作的现代转型。

关键词：抗战文学赋报刊转型

监护人知情同意原则在App未成年人个人信息保护中的适用分析

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

昆明理工大学学报（社会科学版） 2024年第3期24卷 9-19页

作者：李伟赵俊博山东科技大学文法学院山东青岛266590

在未成年人使用App软件过程中,准确理解与严格遵循监护人知情同意原则对未成年人的个人信息保护至关重要。通过对24款App隐私政策协议中未成年人使用条款下监护人知情同意原则的落实适用情况进行分析,发现其中存在着年龄保护范围不一致... 详细信息

在未成年人使用App软件过程中,准确理解与严格遵循监护人知情同意原则对未成年人的个人信息保护至关重要。通过对24款App隐私政策协议中未成年人使用条款下监护人知情同意原则的落实适用情况进行分析,发现其中存在着年龄保护范围不一致且缺少分层设计、监护人非理性决策、知情同意虚设、撤回同意规范不清等问题。基于法益保护界分模糊、监护人“理性假设”尚不明晰、识别提示技术相对落后等原因分析发现,要发挥好监护人知情同意原则在App未成年人个人信息保护中的应有作用,应当针对性地从立法上强化法律规定、司法上区分设计场景、实务上优化技术路径以完善体系构建,从而更好地落实监护人知情同意原则及相应法律条款的具体适用,促进未成年人个人信息合法权益的有效保护。

关键词：监护人知情同意 App 未成年人个人信息保护应用场景

A Hybrid Agent-based Model Predictive Control Scheme for Smart Community Energy System with Uncertain DGs and Loads

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2021年第3期9卷 573-584页

作者： Xiaodi Wang Youbo Liu junbo zhao Junyong Liu the College of Electrical Engineering Sichuan UniversityChengdu 610065China the Department of Electrical and Computer Engineering Mississippi State UniversityStarkville 39762USA

A multi-agent consensus-based market scheme is proposed for the cooperation of community and multiple microgrids(MGs)in a distributed,economic and hierarchal *** proposed community-based market framework with frequency regulation(FR)market is formulated as a two-level scheduling problem:the global decision-making process of community agent(CA)to participate in the FR market and the interaction and control process of local MGs to achieve collaboration in response to the global target with efficient pricing ***,the model predictive control(MPC)is integrated with the consensus-based theory to allow MG to obtain an economic and reliable dispatch in the presence of uncertainties of distributed generators and *** to the distributed nature of the proposed scheme,its robustness to communication issues has been strengthened and a win-win situation for all energy stakeholders can be *** robustness of the proposed scheme is investigated in various conditions,including different implementation strategies,communication topologies,and the level of uncertainties.

关键词： Community market model predictive control(MPC) energy management consensus-based market scheme

Unified optimal power flow model for AC/DC grids integrated with natural gas systems considering gas-supply uncertainties

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2018年第6期6卷 1193-1203页

作者： Jiale FAN Xiaoyang TONG junbo zhao School of Electrical Engineering Southwest Jiaotong University Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University

A unified optimal power flow(OPF) model for AC/DC grids integrated with natural gas systems is proposed for the real-time scheduling of power ***, the primary physical couplings underlying this coordinated system are modeled and investigated. In addition, the uncertainties of gas loads are considered when studying the role of gas supply for gas-fired units in power system operations. The nonlinear gas system constraints are converted to the second-order cone forms that allow for the use of the Benders decomposition techniques and the interior-point method to obtain the optimal solution. The numerical results of the modified IEEE 118-bus test system that integrates the Belgium 20-node natural gas system demonstrate the effectiveness of the proposed model. The effects of gas demand uncertainties on the optimal schedule of thermal generators are investigated as well.

关键词： AC/DC optimal power flow(OPF) Natural gas system Benders decomposition Second-order cone programming

非高斯噪声背景的水下INS-LBL组合导航方法

在线全文

学校读者我要写书评

暂无评论

舰船科学技术 2024年第15期46卷 121-124页

作者：成月曹园山赵俊波李锦葛锡云中国船舶科学研究中心江苏无锡214082

自主水下航行器(AUV)是水下自主协同作业的重要装备,在水下获取持续可靠的高精度定位导航信息是AUV实施任务的重要前提。针对实际环境中系统噪声不再满足高斯分布、难以获得准确模型,进一步造成传统组合导航系统无法精准定位的问题,设... 详细信息

自主水下航行器(AUV)是水下自主协同作业的重要装备,在水下获取持续可靠的高精度定位导航信息是AUV实施任务的重要前提。针对实际环境中系统噪声不再满足高斯分布、难以获得准确模型,进一步造成传统组合导航系统无法精准定位的问题,设计了一种基于最大熵卡尔曼滤波的水下INS-LBL组合导航方法。以INS与LBL之间的水声伪距为系统量测量,建立组合导航系统模型,削弱水下声通信产生的时延误差;采用最大熵卡尔曼滤波算法实现数据融合,提高复杂噪声干扰下的系统定位精度及鲁棒性。仿真结果表明,在非高斯噪声背景下,基于最大熵卡尔曼滤波的水下INS-LBL组合导航方法能够有效抑制干扰,提高系统定位精度。

关键词：最大熵卡尔曼滤波水下导航长基线自主水下航行器

Distributed Real-time State Estimation for Combined Heat and Power Systems

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2021年第2期9卷 316-327页

作者： Tingting Zhang Wen Zhang Qi zhao Yaxin Du Jian Chen junbo zhao the Key Laboratory of Power System Intelligent Dispatch and Control Ministry of EducationShandong UniversityJinan 250061China the Department of Electrical and Computer Engineering Mississippi State UniversityStarkvilleMS 39762USA

This paper proposes a distributed real-time state estimation(RTSE)method for the combined heat and power systems(CHPSs).First,a difference-based model for the heat system is established considering the dynamics of heat *** heat system model is further used along with the power system steady-state model for holistic CHPS state estimation.A cubature Kalman filter(CKF)-based RTSE is developed to deal with the system nonlinearity while integrating both the historical and present measurement ***,a multi-timescale asynchronous distributed computation scheme is designed to enhance the scalability of the proposed method for largescale *** distributed implementation requires only a small amount of information exchange and thus protects the privacy of different energy *** carried out on two CHPSs show that the proposed method can significantly improve the estimation efficiency of CHPS without loss of accuracy compared with other existing models and methods.

关键词： Combined heat and power system(CHPS) cubature Kalman filter(CKF) heat dynamics multi-time-scale asynchronous distributed scheme real-time state estimation(RTSE)

Dynamic State Estimation for DFIG with Unknown Inputs Based on Cubature Kalman Filter and Adaptive Interpolation

在线全文

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2023年第4期11卷 1086-1099页

作者： Maolin Zhu Hao Liu junbo zhao Bendong Tan Tianshu Bi Samson Shenglong Yu State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijingChina Department of Electrical and Computer Engineering University of ConnecticutStorrs06269USA School of Engineering Deakin University75 Pigdons RoadWaurn PondsVIC3216Australia

Dynamic state estimation(DSE)accurately tracks the dynamics of power systems and demonstrates the evolution of the system state in real *** paper proposes a DSE approach for a doubly-fed induction generator(DFIG)with unknown inputs based on adaptive interpolation and cubature Kalman filter(AICKF-UI).DFIGs adopt different control strategies in normal and fault conditions;thus,the existing DSE approaches based on the conventional control model of DFIG are not applicable in all ***,the DSE model of DFIGs is reformulated to consider the converter controller outputs as unknown inputs,which are estimated together with the DFIG dynamic states by an exponential smoothing model and augmented-state cubature Kalman ***,as the reporting rate of existing synchro-phasor data is not sufficiently high to capture the fast dynamics of DFIGs,a large estimation error may occur or the DSE approach may *** this end,in this paper,a local-truncation-error-guided adaptive interpolation approach is *** simulations conducted on a wind farm and the modified IEEE 39-bus test system show that the proposed AICKF-UI can(1)effectively address the divergence issues of existing cubature Kalman filters while being computationally more efficient;(2)accurately track the dynamic states and unknown inputs of the DFIG;and(3)deal with various types of system operating conditions such as time-varying wind and different system faults.

关键词： Adaptive interpolation cubature Kalman filter doubly-fed induction generator(DFIG) dynamic state estimation unknown input