双口 RAM 在 DSP 处理系统中的应用

本文详细讨论了双口RAM器件在DSP处理系统中的应用，给出了双口RAM器件与不同字长总线系统的通用接口，以及双口RAM器件独特的分区工作方式。     

压电驱动微喷雾化器的研制及实验研究

作为一种重要的非注射给药途径，雾化吸入治疗方法具有起效快，药物毒、副作用小等特点，因此被越来越广泛地采用。基于压电驱动喷雾打印机工作基本原理，利用微机加工技术，研制了一种压电驱动微喷雾化器。流量、雾粒的直径和速度是微喷雾化器的重要指标，文中采用相关的仪器分别对这些指标进行了测试。由测试结果可知，微喷雾化器产生的雾粒的直径和速度分布集中，且雾粒直径和速度比较适合于雾化吸入治疗，可能成为一种重要的雾化吸入治疗装置。     

ZnO单晶声表面波谐振器传播特性的研究

基于有限元压电材料中表面波传播的有限元分析原理,利用有限元分析软件COMSOL对基于ZnO单晶材料的声表面波器件进行多物理域耦合建模与仿真,提取出了符合声表面波振型的对称模态变形图和反对称模态变形图。通过谐振频率分析,计算出了ZnO单晶的相速度和机电耦合系数;通过频率响应分析,得出谐振器输入导纳、阻抗与频率之间的关系图;最后讨论了叉指换能器的结构对谐振频率、反谐振频率的影响,得出输入、输出叉指换能器(IDT)的叉指电极对数越大,插入损耗值越大,信号衰减越小。     

高速双端口共享存储器 IDT7025及其应用

双端口共享存储器IDT7025是真正的双口存储单元,允许同一内存地址的同时存取.IDT7025为高速8K×16双口静态RAM,可用作单独的128K位双口RAM也可用作32位或者更多字系统的主从双口RAM的组合.它提供两个独立的口,这两个口可以单独控制、有独自的地址和I/O引脚,从而实现了对内存任何地址的独立的、异步的存取(读写).     

Polymer brush coatings for combating marine biofouling

A variety of functional polymer brushes and coatings have been developed for combating marine biofouling and biocorrosion with much less environmental impact than traditional biocides. This review summarizes recent developments in marine antifouling polymer brushes and coatings that are tethered to material surfaces and do not actively release biocides. Polymer brush coatings have been designed to inhibit molecular fouling, microfouling and macrofouling through incorporation or inclusion of multiple functionalities. Hydrophilic polymers, such as poly(ethylene glycol), hydrogels, zwitterionic polymers and polysaccharides, resist attachment of marine organisms effectively due to extensive hydration. Fouling release polymer coatings, based on fluoropolymers and poly(dimethylsiloxane) elastomers, minimize adhesion between marine organisms and material surfaces, leading to easy removal of biofoulants. Polycationic coatings are effective in reducing marine biofouling partly because of their good bactericidal properties. Recent advances in controlled radical polymerization and click chemistry have also allowed better molecular design and engineering of multifunctional brush coatings for improved antifouling efficacies.     

施工企业对装配式技术接受行为研究 ——基于UTAUT-IDT 整合模型的分析

装配式建筑是建筑业绿色转型的重要举措,政府出台多项政策措施推动装配式建筑的发展,但实践中推广效果不理想,究其原因是建筑企业对装配式建筑接受意愿不高。因此,在对UTAUT 和IDT 模型整合的基础上,从企业和技术扩散的双重视角构建企业接受意愿及行为的理论模型,利用结构方程模型来探究装配式建筑企业接受意愿与接受行为的影响因素。结果表明,兼容扩展性、社会影响、绩效期望、努力期望均对接受意愿存在正向显著影响;感知成本对接受意愿存在负向影响;接受意愿与促成因素对装配式建筑企业接受行为存在显著的正向影响。并在此研究基础上,对装配式建筑可持续发展提出了相应的建议。     

IDT70V9289型高速同步双口SRAM的原理及应用

IDT70V9289是IDT公司新推出的一款高速同步双口静态存储器（SRAM），可实现不同传输方式的双路高速数据流的无损传输。文中详细介绍该电路的结构和原理．给出IDT70V9289的典型应用电路及设计时应注意的问题。     

On the importance of graph search algorithms for DRGEP-based mechanism reduction methods

The importance of graph search algorithm choice to the directed relation graph with error propagation (DRGEP) method is studied by comparing basic and modified depth-first search, basic and R-value-based breadth-first search (RBFS), and Dijkstra’s algorithm. By using each algorithm with DRGEP to produce skeletal mechanisms from a detailed mechanism for n-heptane with randomly-shuffled species order, it is demonstrated that only Dijkstra’s algorithm and RBFS produce results independent of species order. In addition, each algorithm is used with DRGEP to generate skeletal mechanisms for n-heptane covering a comprehensive range of autoignition conditions for pressure, temperature, and equivalence ratio. Dijkstra’s algorithm combined with a coefficient scaling approach is demonstrated to produce the most compact skeletal mechanism with a similar performance compared to larger skeletal mechanisms resulting from the other algorithms. The computational efficiency of each algorithm is also compared by applying the DRGEP method with each search algorithm on the large detailed mechanism for n-alkanes covering n-octane to n-hexadecane with 2115 species and 8157 reactions. Dijkstra’s algorithm implemented with a binary heap priority queue is demonstrated as the most efficient method, with a CPU cost two orders of magnitude less than the other search algorithms.     

On the chemical kinetics of cyclopentadiene oxidation

The cyclopentadiene/cyclopentadienyl system forms a critical part in the oxidation chemistry of aromatic fuel components used in surrogate fuels and the importance of the cyclopentadienyl radical in poly-aromatic hydrocarbon (PAH) growth has also been noted due to its site dependent reactivity. The latter aspect has been subject to a number of studies along with the initial pyrolysis steps. By contrast, few studies have been performed of the corresponding oxidation chemistry under conditions of relevance to combustion applications. Thermochemical data for oxidation reactions featuring the cyclopentadienyl radical with O, OH, HO₂ and O₂ were determined at the G3B3 and G4/G4MP2 levels in combination with an analysis of internal rotations using density functional theory and with the Jahn–Teller effect treated as a pseudo-rotation. The calculated potential energy surfaces were subsequently used in a consistent manner for the determination of pressure dependent reaction rate parameters through the Rice–Ramsperger–Kassel–Marcus/master-equation approach with Eckart quantum tunnelling corrections applied to reactions involving hydrogen transfers. The accuracy of the method was further investigated by comparisons of computed rate parameters for pyrolysis reactions with alternative determinations. The resulting chemistry was incorporated into an evaluation framework for the study of cyclopentadiene oxidation using recent experimental flow reactor data and principal uncertainties in reaction pathways assessed.     

IDT70261在DSP高速实时通信中的应用

介绍了IDT70261的结构特点和基本功能，详细阐述了IDT70261的忙仲裁逻辑、双边中断逻辑和标识器逻辑，给出了一种基于IDT70261的TMS320LF240X和TMS320C54X之间高速实时通信接口设计以及软件实现方案。