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基于图卷积的动态航线网络链路预测模型研究

舰船电子工程 2024年第5期44卷 36-40页

作者：赵联政张培文黎砾丹中国民用航空飞行学院机场学院广汉618307 中国民用航空飞行学院经济与管理学院广汉618307 成都双流国际机场股份有限公司成都610000

为了克服航线网络传统链路预测模型的局限性,考虑网络拓扑特征和时间特性,提出一种基于图卷积网络(Graph Convolution Network,GCN)的动态航线网络链路预测模型。通过图卷积、图池化操作聚合节点及邻域信息,更新节点特征表示,识别节点... 详细信息

为了克服航线网络传统链路预测模型的局限性,考虑网络拓扑特征和时间特性,提出一种基于图卷积网络(Graph Convolution Network,GCN)的动态航线网络链路预测模型。通过图卷积、图池化操作聚合节点及邻域信息,更新节点特征表示,识别节点间潜在联系。实验表明,GCN模型相较于传统链路预测模型具有更高的预测精度、预测效率和性能稳定性,是进行动态航线网络链路预测的一种有效工具。

关键词：航空运输链路预测图卷积网络动态航线网络航线预测

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高水头、大涌水、裂隙密集等复杂条件下的浆砌石坝防渗加固技术研究

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大坝与安全 2024年第1期 55-61页

作者：赵连政张肖肖姜金利张文进周琦青岛市市政工程设计研究院有限责任公司山东青岛266000 山东省调水工程运行维护中心青岛分中心山东青岛266000 青岛市水利勘测设计研究院有限公司山东青岛266000

以青岛市崂山区大河东水库除险加固工程为例,通过前期专项勘察,分析浆砌石大坝渗漏部位及渗漏原因,结合施工条件,选择最佳的防渗加固方案:“防渗面层+帷幕灌浆+固结灌浆”。根据防渗加固后的工程运行效果,重点研究高水头、大涌水、裂隙... 详细信息

以青岛市崂山区大河东水库除险加固工程为例,通过前期专项勘察,分析浆砌石大坝渗漏部位及渗漏原因,结合施工条件,选择最佳的防渗加固方案:“防渗面层+帷幕灌浆+固结灌浆”。根据防渗加固后的工程运行效果,重点研究高水头、大涌水、裂隙密集等复杂条件下浆砌石坝的防渗加固技术。解决复杂条件下的浆砌石坝体渗漏问题,查明渗漏原因是前提,多种防渗加固方式联合应用是手段,长期运行监测是辅助,多管其下才能保障水库大坝的长期安全稳定运行。

关键词：浆砌石坝渗漏原因施工条件防渗加固

Target Tracking Algorithm Using Finite-time Convergence Smooth Second-order Sliding Mode Controller for Mobile Robots

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Chinese Journal of Mechanical Engineering 2011年第3期24卷 414-419页

作者： GE lianzheng zhao Lijun GAO Tong State Key Laboratory of Robotics Technique and System Harbin Institute of Technology Harbin 150001 China

Target tracking control for wheeled mobile robot （WMR） need resolve the problems of kinematics model and tracking ***-order sliding mode control is a valid method used in the nonlinear tracking control system,which can eliminate the chattering of sliding mode *** there lacks the research of robustness and uncertain factors for high-order sliding mode *** address the fast convergence and robustness problems of tracking target,the tracking mathematical model of WMR and the target is *** on the finite-time convergence theory and second order sliding mode method,a nonlinear tracking algorithm is designed which guarantees that WMR can catch the target in finite *** the same time an observer is applied to substitute the uncertain acceleration of the target,then a smooth nonlinear tracking algorithm is *** on Lyapunov stability theory and finite-time convergence,a finite time convergent smooth second order sliding mode controller and a target tracking algorithm are designed by using second order sliding mode *** simulation results verified that WMR can catch up the target quickly and reduce the control discontinuity of the velocity of WMR.

关键词： mobile robots second order sliding mode finite-time convergence observer

DDB1 maintains intestinal homeostasis by preventing cell cycle arrest

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Cell Regeneration 2022年第1期11卷 168-171页

作者： lianzheng zhao Hongwei Liao Xiaodan Wang Ye-Guang Chen The State Key Laboratory of Membrane Biology Tsinghua-Peking Center for Life SciencesSchool of Life SciencesTsinghua UniversityBeijing 100084China Guangzhou Laboratory GuangzhouChina

Dear Editor,The intestinal epithelium is a rapidly self-renew-ing tissue for absorbing nutrients and providing bar-rier functions,and its homeostasis is orchestrated by several signaling pathways(Vermeulen and Snip-pert,2014;Zhu et al.,2021).Growing evidence dem-onstrates the importance of cell cycle regulation in intestinal homeostatic maintenance(McKernan and Egan,2015).Here,we report that the E3 ubiquitin ligase adaptor DDB1(Damaged DNA Binding Protein 1)is highly expressed in the intestinal epithelium and regulates the intestinal homeostasis by preventing cell cycle arrest.

关键词： DDB1 Intestine Homeostasis Cell cycle

The Research and Development of Integrated Operation-Maintenance Simulation Training System

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Journal of Power and Energy Engineering 2014年第4期2卷 470-476页

作者： Feng Gao Xiue Zhang lianzheng zhao Beijing Kedong Electric Control System Co. Ltd. Beijing China Datong Electric Power Senior Technical School Datong China Jibei Electric Power Training Center Beijing China

With deep development of state grid’s system of "Three Sets of Five [1]", China is in urgent need of establishing an appropriate type of simulation system to rapidly improve operation efficiency and the level of maintainers, which aim at the integrated operation of substation operation and maintenance service. This article gives an introduction of a simulation training system which is designed for operation-skills training in electrical systems. By the composition of the multiple subjects and skills training for operations staff, this system can provide human guarantee and intellectual support for the "Big-Centralized Overhal".

关键词： Substation Operation and Maintenance Integration The Simulation Training

Automatic modeling algorithm of stochastic error for inertial sensors

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Control Theory and Technology 2024年第1期22卷 81-91页

作者： Luodi zhao Long zhao School of Automation Science and Electrical Engineering Beihang UniversityBeijing100191China Digital Navigation Center Beihang UniversityBeijing100191China Science and Technology on Aircraft Control Laboratory Beihang UniversityBeijing100191China

This paper proposes an automatic algorithm to determine the properties of stochastic processes and their parameters for inertial error. The proposed approach is based on a recently developed method called the generalized method of wavelet moments (GMWM), whose estimator was proven to be consistent and asymptotically normally distributed. This algorithm is suitable mainly (but not only) for the combination of several stochastic processes, where the model identification and parameter estimation are quite difficult for the traditional methods, such as the Allan variance and the power spectral density analysis. This algorithm further explores the complete stochastic error models and the candidate model ranking criterion to realize automatic model identification and determination. The best model is selected by making the trade-off between the model accuracy and the model complexity. The validation of this approach is verified by practical examples of model selection for MEMS-IMUs (micro-electro-mechanical system inertial measurement units) in varying dynamic conditions.

关键词： GMWM Stochastic process Inertial sensor Sensor calibration Error model Allan variance

Meeting the challenges of invasive alien species

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National Science Review 2024年第3期11卷 296-298页

作者： Weijie zhao NSR news

The Xinjiang Uygur Autonomous Region of China is famous for its tomato production. Abundant sunshine, large day–night temperature difference and the abundant irrigation by snowmelt from the Tianshan Mountains produce...

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Ling-Ling Chen: RNA has its own features;don't study it as a protein

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National Science Review 2024年第2期11卷 301-305页

作者： Weijie zhao NSR

Non-coding RNA(ncRNA) has been a very active research area over the past 30 years. From small nc RNA – the discovery of RNA interference won the lead researchers the Nobel Prize, to long ncRNA(lncRNA), which has attracted much attention in recent years, various nc RNAs participate in all kinds of biological processes and show a variety of biomedical application prospects.

关键词： RNA

One dimensional CeO_(2) nanorods/poly(ethylene oxide) solid composite electrolyte for all-solid-state lithium-ion batteries

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Journal of Rare Earths 2024年第3期42卷 570-577,I0005页

作者： Yudi Guo Erqing zhao Xiaofang zhao Shuailei Liu School of Chemistry and Materials Engineering Xinxiang UniversityXinxiang453003China School of Chemistry and Chemical Engineering Henan Institute of Science and TechnologyXinxiang453003China

The research of poly(ethylene oxide)(PEO)-based solid composite electrolyte with high ionic conductivity and excellent interfacial stability is the key to the development of all-solid-state lithium-ion batteries(ASSLIBs). Herein, uniform nanorod structured CeO_(2) fillers were controllably synthesized by electrospinning, which were subsequently filled into PEO polymer to prepare CeO_(2)/PEO solid composite electrolyte. The addition of CeO_(2) nanorods can reduce both the glass transition temperature and the melting point of PEO polymer, and also interact with PEO and lithium bis(trifluoromethanesulphonyl)imide(LITFSI) by Lewis acid—base reaction. Therefore, the solid composite electrolyte exhibits a high ionic conductivity of 4.52 × 10^(-4)S/cm, a wide electrochemical stability window of about 4.8 V, and a good interfacial stability with Li at 55℃. Moreover, the LiFePO_4/Li ASSLIB divulges the discharging specific capacity of 165, 162, 156 and 146 mA,h/g at 0.2, 0.5, 1 and 2 C, respectively, and achieves the capacity retention of 90.3% after 150 cycles at 0.5 C. Consequently, one dimensional CeO_(2) nanorods can be considered as an alternative filler for polymeric solid electrolyte.

关键词： Poly(ethylene oxide) Solid composite electrolyte CeO_(2)nanorods Ionic conductivity Rare earths