Research on Spatially Adaptive High-Order Total Variation Model for Weak Fluorescence Image Restoration

Photoacoustic imaging acquires the absorption contrast of biological tissue with ultrasound resolution. It has been broadly investigated in biomedicine for animal and clinical studies. Recently, a micro-electro-mechanical system (MEMS) scanner has been utilized in photoacoustic imaging systems to enhance their performance and extend the realm of applications. The review provides a recap of recent developments in photoacoustic imaging using MEMS scanner, from instrumentation to applications. The topics include the design of MEMS scanner, its use in photoacoustic microscopy, miniature imaging probes, development of dual-modality systems, as well as cutting-edge bio-imaging studies.     

深圳市“轨道+物业”开发实践及发展策略

"轨道+物业"开发模式促进了城市土地集约化利用、为轨道交通建设的可持续发展提供资金保障,在轨道交通行业已形成共识。轨道交通沿线土地综合开发是当前轨道交通企业采用的主要融资模式,是中国主要城市迫切需要推行的模式。阐述对"轨道+物业"开发的认识,对深圳市土地作价出资政策、开发模式、上盖物业与轨道交通建设衔接、持有优质物业等核心问题进行详细分析。探讨未来深圳市轨道交通上盖开发面临政策调整风险、土地资源稀缺、保障性住房建设等多种挑战。最后,提出积极走市场化路线参与城市更新、建设安居型可售人才房和保障房、实施走出去战略、"轨道+物业"开发经验输出等发展策略,以实现轨道交通建设可持续发展。     

起停控制策略对整车油耗及排放的影响

介绍了几种混合动力模式的特点,对起停系统的构成和零部件进行分析;建立起停控制系统起动过程的动力学方程,描述了起停系统的工作模式;在AVL Cruise仿真软件中对4种工作循环进行工况油耗的仿真计算;在NEDC循环中对带与不带起停控制系统的整车进行国Ⅳ排放和油耗的测试.实车试验结果表明,仿真模型准确;加装了起停系统的车辆排放性能基本与不带起停系统车辆相当,而其油耗水平则有较大改善.     

基于ADAMS的12自由度动力总成悬置系统怠速隔振分析

以某轻型客车为研究对象,建立了包括动力总成和车身两个刚体的12自由度动力总成悬置系统的ADAMS动力学模型,提出了一种试验与理论计算相结合确定发动机怠速激励的方法。采用该模型对动力总成悬置系统怠速隔振性能进行了仿真计算与分析。仿真结果与试验结果对比表明二者吻合较好,说明所建立的12自由度ADAMS模型和确定的发动机激励是准确的。     

一种自动张紧装置阻尼系数影响因素的研究

建立了发动机前端附件驱动系统张紧装置阻尼系数的数学表达式,并通过了实验验证;进而研究了该张紧装置的结构参数对其阻尼系数的影响规律.结果表明:扭簧中径、摆臂与摩擦片摩擦因数和摩擦片外径是影响其阻尼系数的主要因素.     

浅谈城市道路水泥混凝土路面提质改造设计

湖南省湘阴县滨江大道是县城一条重要的城市主干道。分析了提质改造中原有水泥混凝土路面加铺沥青混凝土设计的原理、设计要点、具体加铺方案及注意事项,可为类似的城市道路路面提质改造建设提供参考。     

寒山大桥加宽工程主桥设计与施工简介

简要介绍了寒山大桥加宽工程概况。详细介绍了该桥主桥设计要点,并对该桥上部结构,包括混凝土主梁段、钢梁架设、钢管拱架设等主要施工方法进行了阐述。     

沉井工程施工的环境效应及防治措施

该文针对沉井施工对井周边环境的影响,提出环境效益的概念,采取合理防治措施,使工程获得最佳的经济效益和社会效益。其成果可为同类型工程设计及施工提供参考。     

浅谈公路桥梁施工安全控制技术

在公路桥梁的施工过程中,安全控制技术非常重要。该文对公路桥梁中常见的安全事故原因进行了分析,并对其详细的安全控制技术进行了探讨,希望能够对人们在这方面的研究起到一定的指导和促进作用。     

Modeling and control strategy development of a parallel hybrid electric bus

This paper presents the system modeling, control strategy design, and experiment validation of a parallel hybrid electric bus with an automatic manual transmission (AMT) and a dry clutch. The mathematical model representation and the system architecture of the powertrain are first described. Next, a complete control scheme including energy management strategy and coordinated control of the AMT and the clutch is presented. The controller and powertrain models are then integrated in a way that the power management and the hybrid driveline perform in real world. The analysis and validation through model simulation and comparison with experiment data are conducted. A good agreement between the model and experiment demonstrates the efficacy and credibility of the integrated model. The integrated model is employed in both simulation and bench-test assessments for the development of a hybrid control unit. The results indicate that the model-based design methodology is beneficial to systematically analyzing and understanding the dynamics of hybrid electric powertrain.