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Two-dimensional gersiloxenes with tunable band gap as new photocatalysts

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Rare Metals 2020年第6期39卷 610-612页

作者： shao-Wen Cao State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Designing highly efficient and stable photocatalysts is of vital importance for solar-to-fuel conversion,as a potential strategy to address the concerns of global energy crisis and environmental *** development of novel photocatalytic materials is desirable to overcome those shortcomings of traditional semiconductor photocatalysts.

关键词： catalysts overcome shortcomings

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海上漂浮式光伏多浮体间电缆跨接方法研究

工程科学学报 2025年第02期47卷 389-400页

作者：孔祥玉邵阳苹付强俞露杰刘宏斌天津市新能源电力变换传输与智能控制重点实验室(天津理工大学) 天津大学电气自动化与信息工程学院

浮体间跨接电缆因设计不合理，在运行期间出现过度弯曲、拉伸、与浮体碰撞等现象，影响系统可靠运行.针对跨浮体电缆容易出现疲劳失效的问题，本文提出一种海上漂浮式光伏多浮体间电缆跨接方法.首先，对浮体结构进行分析，确定典型六边... 详细信息

浮体间跨接电缆因设计不合理，在运行期间出现过度弯曲、拉伸、与浮体碰撞等现象，影响系统可靠运行.针对跨浮体电缆容易出现疲劳失效的问题，本文提出一种海上漂浮式光伏多浮体间电缆跨接方法.首先，对浮体结构进行分析，确定典型六边形浮体间的电缆跨接方案.其次，通过分析浮体结构对跨接方案的影响，确定电缆跨浮体设计步骤中的关键参数与限制条件；通过与现阶段跨接电缆保护手段对比，提出一种通过合理规划跨接参数满足运行要求的方法，建立电缆跨接方案两阶段求解框架；采用信赖域粒子群算法在第一阶段求解出跨接方案变量的可行解区域，第二阶段在可行解区域中求解出疲劳寿命最大值作为跨接方案最优解.最后，在Orcaflex软件搭建电缆跨接模型对最终方案进行校验，通过算例分析验证本文所提方法的有效性.研究表明，通过对合理规划跨接电缆路径，可以在一定程度上缓解电缆的弯曲状态，降低疲劳损伤，可以在运行年限期间可靠运行.

关键词：漂浮式光伏电缆跨浮体连接疲劳失效信赖域粒子群

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Research of Neural Network Structural Optimization Based on Information Entropy

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Chinese Journal of Electronics 2020年第4期29卷 632-638页

作者： WANG Danyang shao Fangming School of Science East China University of Science and Technology

In the application of deep learning, the depth and width of the neural network structure have a great influence on the learning performance of the neural *** paper focuses on structural optimization of depth and width, leveraging the information entropy model and decision tree strategy as feature selection and structural adjustment to optimize neural network ***, a decision tree-based heuristic optimization algorithm for neural network structural adjustment is ***, the proposed approach is applied to fully-connected neural networks trained on the Iris dataset, and the proposed approach is verified effective via experimental simulation.

关键词： Information entropy Decision tree Fully connected neural network Heuristic algorithm

Imaging supermassive black hole shadows with a global very long baseline interferometry array

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Frontiers of physics 2022年第4期17卷 1-4页

作者： Lijing shao Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China National Astronomical Observatories Chinese Academy of SciencesBeijing 100012China

The imaging of two supermassive black holes by the Event Horizon Telescope Collaboration proved to a new level the correctness of Einstein's general relativity,regarding its prediction of black hole shadows in the hig... 详细信息

关键词： Event Horizon Telescope very long baseline interferometry,black hole black hole shadow

Sampling Dependent Stability Results for Aperiodic Sampled-Data Systems

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Journal of Systems Science & Complexity 2021年第2期34卷 588-601页

作者： shao Hanyong YUAN Guangxia The Institute of Automation Qufu Normal UniversityRizhao 276826China

This paper investigates sampling dependent stability for aperiodic sampled-data systems by employing a Lyapunov-like functional that is time-dependent,and not imposed to be definite *** on the system information on the sampling interval wholly rather than partly,a new Lyapunovlike functional is constructed,which extends existing ones by introducing the integral of the system state and the cross terms among this integral and the sampled *** take advantage of the integral of the system state,integral equations of the sampled-data system are explored when estimating the derivative of the extended *** the Lyapunov-like functional theory,a new sampling dependent stability result is obtained for sampled-data systems without ***,the stability result is applied to sampled-data systems with polytopic uncertainties and a robust stability result is *** last,numerical examples are given to illustrate that the stability results improve over some existing ones.

关键词： Asymptotic stability Lyapunov-like functional polytopic uncertainties sampled-data systems

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NES cell

Applied Mathematics and Mechanics(English Edition) 2022年第12期43卷 1793-1804页

作者： Hu DING Yufei shao Shanghai Key Laboratory of Mechanics in Energy Engineering School of Mechanics and Engineering ScienceShanghai UniversityShanghai200072China

A broadband adaptive vibration control strategy with high reliability and flexible versatility is *** high vibration damping performance of nonlinear energy sink(NES)has attracted ***,targeted energy transfer may cause severe vibration of ***,it is difficult to realize pure nonlinear stiffness without the linear *** a result,the reliability of NES is not *** low reliability of NES has hindered its application in *** addition,the performance of NES depends on its mass ratio of the primary system,and NES lacks versatility for different vibration ***,this paper proposes the concept of NES *** advantages of the adaptive vibration control of NES are applied to cellular *** applying a large number of NES cells in parallel,the reliability of NES and its versatility to complex vibration structures are *** elastic beam is used as the primary vibration structure,and a limited NES is used as the *** relationship between the vibration suppression effect of NES cells and the number of NES cell is *** addition,the effect of the distribution of NES cells on the multi-mode resonance suppression of the beam is also *** summary,the mode of the primary structure can be efficiently controlled by a large number of lightweight NES ***,the lightweight NES cell is flexible for vibration control of complex *** addition,it improves the reliability of NES ***,the distributed application of NES cells proposed in this paper is a valuable vibration suppression strategy.

关键词： vibration nonlinear energy sink(NES) NES cell vibration control clamped beam harmonic balance method(HBM)

Challenges and countermeasures of urban water systems against climate change:a perspective from China

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Frontiers of Environmental Science & Engineering 2023年第12期17卷 189-195页

作者： Yisheng shao Yijian Xu China Academy of Urban Planning&Design No.5 Chegongzhuang West RoadBeijing 100044China

Urban water systems are facing various challenges against climate change,impacting cities’security and their sustainable ***,there are three major challenges:submersion risk of coastal cities as glaciers melt and sea level rises,more and severe urban flooding caused by extreme weather like intensified storm surge and heavy precipitation,and regional water resource patterns challenged by alteration of spatial distribution of *** this,two strategies including proactive adaptation and positive mitigation were proposed in this article to realize the reconstruction and optimization of urban water systems,to enhance their resilience,and eventually increase their adaptability and coping ability to climate *** proactive adaptation strategy consists of 1)construction of sponge cities to accommodate the increased regular rainfall and to balance the alterations of spatial redistribution of precipitation;2)reconstruction of excess stormwater discharge and detention system to increase capability for extreme precipitation events based on flood risk assessment under future climate change;3)deployment of forward-looking,ecological,and integrated measures to improve coastal protection capability against inundation risks caused by climate change and sea level *** positive mitigation strategy is to employ the systematic concept in planning and design and to adopt advanced applicable energy-saving technologies,processes,and management practices,aiming at reduction in flux of urban water systems,reinforcement in energy conservation and carbon reduction in both water supply systems and wastewater treatment systems,and thus a reduction of greenhouse gas emission from urban water systems.

关键词： Climate change Urban water system Resilience Adaptation Mitigation

Topologically Correct Intersection Curves of Two Trimmed Quadrics with Tolerance Control

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Journal of Systems Science & Complexity 2024年第5期37卷 2207-2239页

作者： shao Wenbing CHEN Falai Department of Mathematics University of Science and Technology of ChinaHefei 230026China

Surface/surface intersection is a fundamental problem in Compute Aided Design and Geometric Modeling since it is essential to solid modeling,numerically controlled machining,feature recognition,computer animation,*** practical applications,quadric surfaces,which are the most basic type of surfaces,are typically bounded surfaces trimmed by a sequence of *** this paper,a robust algorithm is proposed for computing the intersection curve segments of two trimmed quadrics based on the parametric representation of the intersection curves of two *** proposed algorithm guarantees correct topology and ensures that the approximation errors of the end points of the intersection curve segments are less than a given *** error control is based on an effective solution to a set of polynomial inequality system using the root isolation *** examples are presented to validate the robustness and effectiveness of the proposed algorithm.

关键词： Polynomial inequality system root isolation surface/surface intersection tolerance control trimmed quadrics

Theoretical Analysis of Crack Propagation Measurement for Brittle Materials Based on Virtual Principal Strain Field

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Acta Mechanica Solida Sinica 2022年第5期35卷 842-850页

作者： Liuning Gu Xinxing shao Department of Engineering Mechanics School of Civil EngineeringSoutheast UniversityNanjing211189China

The measurement of crack propagation is crucial for revealing the fracture mechanical properties of materials and *** on the virtual principal strain field and Steger’s algorithm,an accurate and automatic method has been proposed for measuring the geometric parameters of crack *** measured geometric parameters of crack propagation include the width,length,and tip location of each *** mechanism of the crack-induced virtual principal strain field and the effects of subset,step,and strain window size are analyzed and discussed *** effectiveness of the derived theoretical equations is verified by the simulation *** to the theoretical equations,it is determined that the distribution of the virtual principal strain field near the crack is similar to the grayscale distribution of the laser fringe image with optimized calculation *** are further conducted to validate the effectiveness of the derived *** the optimized calculation parameters,the minimum crack that can be measured is approximately 0.0362 pixel in the laboratory environment,while the measurement error of the crack width is less than 0.025 pixel for two-dimensional digital image correlation(DIC)and 0.020 pixel for three-dimensional DIC.

关键词： Crack propagation Brittle materials Digital image correlation Virtual principal strain Steger’s algorithm