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Acta Mechanica Sinica 2008年第2期24卷 223-228页

作者： Jun Zhang Yingxi Liu Xiuzhen Sun Shen yu chi yu State Key Laboratory of Structural Analysis for Industrial Equipment Dalian University of Technology Dalian 116024 China Department of Otorhinolaryngology the Second Affiliated Hospital of Dalian Medical University Dalian 116027 China

To study the airflow distribution in human nasal cavity during respiration and the characteristic parameters of nasal structure, three-dimensional, anatomically accurate representations of 30 adult nasal cavity models were recons- tructed based on processed tomography images collected from normal people. The airflow fields in nasal cavities were simulated by fluid dynamics with finite element software ANSYS. The results showed that the difference of human nasal cavity structure led to different airflow distribution in the nasal cavities and variation of the main airstream passing through the common nasal meatus. The nasal resistance in the regions of nasal valve and nasal vestibule accounted for more than half of the overall resistance. The characteristic model of nasal cavity was extracted on the basis of characteristic points and dimensions deduced from the original models. It showed that either the geometric structure or the airflow field of the two kinds of models was similar. The characteristic dimensions were the characteristic parameters of nasal cavity that could properly represent the original model in model studies on nasal cavity.

关键词： Nasal cavity Characteristic dimension Three-dimensional reconstruction Numerical simulation of flowfield Computational fluid dynamic Finite element method

新工科下基于科教融合的“桥梁工程”教学改革

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教育教学论坛 2024年第3期 69-72页

作者：焦驰宇龙佩恒乔宏北京建筑大学古桥研究院北京100044 北京建筑大学土木与交通工程学院北京100044

如何立足新工科思维,开展针对“桥梁工程”的探索性教学改革成为道桥专业人才亟须解决的关键问题。在结合学科特点和当代大学生特征的基础上,深入分析当前桥梁课程教学方式的不足。基于科教融合理念,以“创新工程教育模式”为指引,提出... 详细信息

如何立足新工科思维,开展针对“桥梁工程”的探索性教学改革成为道桥专业人才亟须解决的关键问题。在结合学科特点和当代大学生特征的基础上,深入分析当前桥梁课程教学方式的不足。基于科教融合理念,以“创新工程教育模式”为指引,提出了将工程实践引入教学内容、将科研成果引入教学过程、将科研思维引入教学组织的教改实施路径,并给出“课堂教学催生问题提出”“实践教学推动科研进展”“学科竞赛提升科研质量”等创新理念。成果可为同类课程教学改革提供借鉴。

关键词：新工科科教融合桥梁工程工程实践

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模拟突触传递机制演示教具的设计和使用

生物学通报 2024年第2期59卷 58-60页

作者：黄婷婷虞驰浙江省宁海中学浙江宁波315600 浙江省宁波市第四中学浙江宁波315016

利用简单易得的材料进行改造,为学生提供基本模型部件,学生通过部件的选择、构建、移动自主演示“兴奋在神经元之间传递的机制”,实现学生思维可视化、抽象过程直观化、教具使用灵活化。在互评修正中完善对抽象过程的认识,突破学习难点... 详细信息

利用简单易得的材料进行改造,为学生提供基本模型部件,学生通过部件的选择、构建、移动自主演示“兴奋在神经元之间传递的机制”,实现学生思维可视化、抽象过程直观化、教具使用灵活化。在互评修正中完善对抽象过程的认识,突破学习难点,提高学习效果。

关键词：突触传递机制模型制作动态模拟

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传承红色基因弘扬国有企业先进精神

石油化工管理干部学院学报 2024年第4期26卷 19-22页

作者：赵庆李晶迟瑜中国大连高级经理学院辽宁大连116086 东北财经大学马克思主义学院辽宁大连116028

国有企业在党的领导下勇担重任、开拓进取,为祖国和人民创造了丰富物质财富的同时,也创造了宝贵的精神财富,形成了具有国有企业特色的深厚文化积淀。探究国有企业传承红色基因的重要意义,挖掘国有企业在不同历史时期凝结的先进精神文化... 详细信息

国有企业在党的领导下勇担重任、开拓进取,为祖国和人民创造了丰富物质财富的同时,也创造了宝贵的精神财富,形成了具有国有企业特色的深厚文化积淀。探究国有企业传承红色基因的重要意义,挖掘国有企业在不同历史时期凝结的先进精神文化,立足新时代提出国有企业传承红色基因、弘扬国有企业先进精神路径,推动国有企业做强做优做大,为经济高质量发展注入更多新活力。

关键词：国有企业红色基因国有企业先进精神实践路径

A Symbol Timing Recovery Algorithm of M-PSK Signals for Burst Modem Applications with Small Packet Size

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china Communications 2016年第6期13卷 138-146页

作者： yu chi Lan Chen Chao Lv Institute of Microelectronics Chinese Academy of Sciences

Feedforward symbol timing recovery techniques are particularly important for initial acquisition in burst modems. However, these techniques either have large calculation burden or sensitive to frequency offsets. In this paper, we proposed an efficient symbol timing recovery algorithm of MPSK signals named OMQ(Ordered Maximum power using Quadratic approximation partially) algorithm which is based on the Quadratic Approximation(QA) algorithm. We used ordered statistic sorting method to reduce the computational complexity further, meanwhile maximum mean power principle was used to decrease frequency offset sensitivity. The proposed algorithm adopts estimation-down sampling structure which is suitable for small packet size transmission. The results show that, while comparing with the QA algorithm, the computational complexity is reduced by 75% at most when 8 samples per symbol are used. The proposed algorithm shows better performance in terms of the jitter variance and sensitivity to frequency offsets.

关键词： symbol timing maximum mean power ordered statistic Quadratic Approximation

Short-term emergency response planning and risk assessment via an integrated modeling system for nuclear power plants in complex terrain

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Frontiers of Earth Science 2013年第1期7卷 1-27页

作者： Ni-Bin CHANG yu-chi WENG Department of Civil Environmental and Construction Engineering University of Central Florida Orlando FL 32816 USA Division of Environmental Engineering Graduate School of Engineering Hokkaido University Hokkaido Sapporo 060-8628 Japan

Short-term predictions of potential impacts from accidental release of various radionuclides at nuclear power plants are acutely needed, especially after the Fukushima accident in Japan. An integrated modeling system that provides expert services to assess the consequences of accidental or intentional releases of radioactive materials to the atmosphere has received wide attention. These scenarios can be initiated either by accident due to human, software, or mechanical failures, or from intentional acts such as sabotage and radioIogicaI dispersal devices. Stringent action might be required just minutes after the occurrence of accidental or intentional release. To fulfill the basic functions of emergency preparedness and response systems, previous studies seldom consider the suitability of air pollutant dispersion models or the connectivity between source term, disper- sion, and exposure assessment models in a holistic context for decision support. Therefore, the Gaussian plume and puff models, which are only suitable for illustrating neutral air pollutants in fiat terrain conditional to limited meteorological situations, are frequently used to predict the impact from accidental release of industrial sources. In situations with complex terrain or special meteorological conditions, the proposing emergency response actions might be questionable and even intractable to decision- makers responsible for maintaining public health and environmental quality. This study is a preliminary effort to integrate the source term, dispersion, and exposure assessment models into a Spatial Decision Support System （SDSS） to tackle the complex issues for short-term emergency response planning and risk assessment at nuclear power plants. Through a series model screening procedures, we found that the diagnostic （objective） wind field model with the aid of sufficient on-site meteorological monitoring data was the most applicable model to promptly address the trend of local wind field patt

关键词： emergency response nuclear power plants diagnostic model particle model source term model spatial analysis Spatial Decision Support System

N-doped NaTaO3 synthesized from a hydrothermal method for photocatalytic water splitting under visible light irradiation

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Journal of Energy Chemistry 2017年第3期26卷 515-521页

作者： Che-chia Hu Hui-Hsin Huang yu-chi Huang Department of Chemical Engineering and R&D Center for Membrane Technology Chung Yuan Christian UniversityTaoyuan City 32023TaiwanChina

NaTaONcatalysts were synthesized by a hydrothermal（H） and a solid-state（S） methods in this *** H-and S-NaTaONsamples were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, UV–visible（UV–vis） diffuse reflectance spectroscopy, and photoluminescence（PL） spectroscopy. The XRD patterns of the H-and S-samples showed peaks indexed to the pure phase of perovskite NaTaOand minor peaks assignable to TaNat various synthesis temperatures. Substitution of oxygen by nitrogen ions causes the light absorption of the H-and S-NaTaONsamples to be extended to the 600–650 nm region, thus making the samples visible-light active. The NaTaONsamples exhibited photocatalytic activity for Hand Oevolution from aqueous methanol and silver nitrate solutions under visible-light irradiation. The UV–vis and PL spectra of the Hand S-catalysts revealed the presence of cationic vacancies and reduced metallic species, which acted as recombination centers. These results demonstrated that the preparation method plays a critical role in the formation of defect states, thereby governing the photocatalytic activity of the NaTaONcatalysts.

关键词： Photocatalysis H2 production N-doped NaTaO3 Hydrothermal method Visible light

Husserl's Intercultural Implication of Ethical Renewal and Theoretical Rationality:A Reappraisal from an East Asian Perspective

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Frontiers of Philosophy in china 2020年第3期15卷 509-531页

作者： yu Chung-chi Department of Philosophy Sun Yat-sen UniversityKaohsiung City 80424China

In the Kaizo articles,written between 1922 and 1924,Husserl touched on the intercultural relationship between"the European"and"the non-European."Husserl addressed Japan as he dealt with ethical and cultural renewal in his Kaizo *** wished to spread the European spiritual gestalt,which he comprehended as a universal theoretical rationality to remote *** that time,Husserl imagined china as unfamiliar and *** even used china as a typical example of alienworld when he dealt with the problem of cultural *** paper reappraises Husserl's thesis by exploring Eurocentrism as a factor that might impede the willingness for non-Western or non-European cultures to accept the idea of European spiritual *** paper suggests that the non-Western or non-European cultures should take delight in learning from Europe and carry out what Husserl had in mind about the meaning of"renewal."

关键词： Husserl renewal theoretical attitude interculturality the idea of Europe

Study on hydrodynamic vibration in fluidic flowmeter

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第9期8卷 1422-1428页

作者： WANG chi-yu ZOU Jun FU Xin YANG Hua-yong Institute State Key Laboratory of Fluid Power Transmission amt Control Zhejiang University Hangzhou 310027 China

The characteristics of the fluidic flowmeter,which is a combination of impinged concave wall and bistable fluid amplifier,is investigated by experimental studies and numerical simulations. The numerical approaches are utilized to examine the time dependent flow field and pressure field inside the proposed flowmeter. The effect of varying structural parameters on flow characteristics of the proposed fluidic flowmeter is investigated by computational simulations for the optimization. Both the simulation and experimental results disclose that the hydrodynamic vibration,with the same intensity,frequency and 180° phase shift,occurs at axisymmetric points in the feedback channel of the fluidic flowmeter. Using the structural combination of impinged concave wall and bistable fluid amplifier and differential signal processing technique,a novel fluidic flowmeter with excellent immunity and improved sensibility is developed.

关键词： Flowmeter Fluidic Hydrodynamic vibration Coanda effect

Performance-based concept on seismic evaluation of existing bridges

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Earthquake Engineering and Engineering Vibration 2009年第1期8卷 127-135页

作者： yu-chi Sung Wen-I Liaoi W.Phillip Yen Department of Civil Engineering Taipei University of Technology Taipei 10608 Chinese Taipei Office of lnfrastructure R＆D Federal Highway Administration 6300 Georgetown Pike McLean VA 20121 USA

Conventional seismic evaluation of existing bridges explores the ability of a bridge to survive under significant earthquake excitations. This approach has several major drawbacks, such as only a single structural performance of near collapse is considered, and the simplified approach of adopting strength-based concept to indirectly estimate the nonlinear behavior of a structure lacks accuracy. As a result, performance-based concepts that include a wider variety of structural performance states of a given bridge excited by different levels of earthquake intensity is needed by the engineering community. This paper introduces an improved process for the seismic evaluation of existing bridges. The relationship between the overall structural performance and earthquakes with varying levels of peak ground acceleration （PGA） can successfully be linked. A universal perspective on the seismic evaluation of bridges over their entire life-cycle can be easily obtained to investigate multiple performance objectives. The accuracy of the proposed method, based on pushover analysis, is proven in a case study that compares the results from the proposed procedure with additional nonlinear time history analyses.

关键词： pushover analysis plastic hinge seismic capacity seismic demand performance-based concepts