基于时间触发的高可靠性实时系统架构

时间触发架构（TTA）为设计和实现高可靠性分布式嵌入式系统提供了软件和硬件的模型。在TTA系统中，全局时基和各种接口的精确定义，简化了节点间通信，保障了实时应用时限和错误检测。该文描述了TTA模型和TTA设计原则，并提出了基于TTA简单的车载节点模型。     

面向TTA结构的可重定向周期精确模拟器的设计与实现

给出了一种面向传输触发体系结构的可重定向周期精确模拟器的设计与实现。该模拟器能够在不修改的情况下，对不同的TTA硬件体系结构设计进行高效的模拟。同时提供了方便的用户自定义扩展指令的添加接口。为了加快模拟速度，提出了一种预解释模拟机制。     

基于一种类似TTA的特殊应用的资源估计方法

在嵌入式系统设计中，由于系统的日益复杂性和设计时限使得高级语言综合正在越来越受到重视。尽管可以在系统级进行功能验证，但是在设计的早期对其影射成相应硬件后的资源消耗的估计变得非常的困难。文中描述了一种将高级语言影射成一种类似TTA硬件结构的方法，以此得到了一种可用于硬件资源估计的模型，并提出了基于这种模型的硬件资源估计方法。我们得到的资源估计的相对误差小于10％，并通过一个GPS来演示了整个流程，最后的结果也验证了我们的方法。我们相信我们的方法在早期的设计空间探索中会对系统设计者和结构搭建者有很大帮助。     

魏德米勒2008倾情力作——WAVE TTA隔离器

魏德米勒新近开发了WAVE，TTA万能变送隔离器。新的TTA是一款通用的带变送功能和报警功能的隔离器。它集超高性能和灵活组态于一身。具有宽工作温度范围、宽供电范围和适用于绝大多数传感器类型的特点，并且在这些情况下仍然能够高精度和高稳定地运行使其非常适合应用于过程控制行业。     

魏德米勒WAVE TTA隔离器荣膺2008年度CEC编辑选择奖

魏德米勒新近开发了WAVE TTA万能变送隔离器。可以说一个TTA模块就是一个智能信号处理器。涵盖了信号隔离器、转换器、变送器、线性处理器和报警器等诸多功能。新的TTA是一款通用的带变送功能和报警功能的隔离器。它是魏德米勒隔离器产品线中久负盛名的WAVE系列产品家族中的新的一员。该系列隔离器已经广泛应用于过程自动化和工厂自动化领域。     

一种基于TD-SCDMA集群通信系统的AHP切换算法研究

为了提高移动用户的切换成功率,提出了一种基于TD-SCDMA集群通信系统的层次分析法(AHP)切换算法(TTA)。使用该算法综合考虑用户端的信息,根据相邻小区的负载和网络资源等因素来最终确定目标小区,并对其进行了仿真验证。仿真结果证明,利用该切换算法能有效提高切换成功率。     

深度学习在遥感影像云检测中的应用

针对传统云检测算法对噪声敏感、提取轮廓不精确等问题,提出一种结合语义分割神经网络结构U-Net和后处理算法TTA(test time augmentation)的云检测方法,实现了高精度云检测的同时还很好地保留了云边缘轮廓。首先,利用U-Net网络的U型结构挖掘云覆盖区域像元高级、低级特征;其次,通过TTA增强待云检测的影像特征,提升模型鲁棒性。实验结果表明,结合U-Net结构和TTA的云检测精度达到93.2%,高于其他传统算法约5%,解决了经典算法对噪声敏感的缺点,提高了仅使用U-Net时的云检测精度。     

传输触发体系结构指导下的ASIP自动生成

提出传输触发体系结构（TTA）指导下的专用指令集处理器自动生成方法,可有效地解决指令集生成、可重定向编译和微结构设计等问题. TTA只包括一种指令即传输指令,避免了指令集生成的问题;在该方法的软件工具链中,语义翻译和调度相互独立,调度器无需关心语义,解决了可重定向编译的问题;微结构设计遵循统一模板,其寄存器传输级描述可自动生成.另外,针对应用的性能优化与连接优化过程是自动完成的.在密码算法领域的应用验证了该方法的有效性.     

传输触发体系结构指导下的ECC整体算法处理器设计

以传输触发体系结构(TTA)为基础,为支持大数运算扩展寄存器堆,并增加模乘单元以加速模乘操作,提出一种ECC整体算法处理器.该处理器具有如下特点: ①利用TTA工具链可快速开发出ECC公钥系统;②模乘单元将以基数为处理字长的高基数Montgomery算法与行共享流水结构相结合,具有良好的可扩展性;③流水站实现矢量乘操作,并同时支持GF(p)和GF(2n)双有限域;④通过调整总线宽度和流水站个数,可满足不同性能/面积要求.在0.18μm CMOS工艺下,其高性能和紧缩面积版本的电路等效门数分别为117.4×103和40.6×103,可分别在0.87ms和7.83ms内完成一次GF(p)或GF(2n)上的192位EC标量乘运算.     

魏德米勒ACT20X安全栅

继2008年，魏德米勒向市场推出一款领先而成功的WAVE TTA万能隔离变送器之后，在2009年，一款对于魏德米勒具有里程碑意义的新产品ACT20X安全栅闪亮登场。ACT20X产品系列是魏德米勒最新推出的一款新型的可处理来自危险区域信号的安全栅：该产品系列涵盖了几乎所有危险区域的各种输入输出信号类型。     

Using AHP to determine intangible priority factors for technology transfer adoption

Technology has characteristics of inducing changes under competitive environment due to its dynamic property of being modified and accelerated over time. In order to improve profitability, the evaluation of technology transfer adoption (TTA) is very important for determining the weights of TTA factors, the influence of the organizational factors (i.e., the measures of TTA dimension) such as chief executive officer (CEO)’ mind and capacity, commercialization, and technology licensing office (TLO)’s competence on the profitability of emerging technologies (ET), and the size of these organizational factors in suppler and buyer.This research investigates the important intangible priority factors for the transfer of technology through analytic hierarchy process (AHP) method and correlation analysis. The study is based on three phases: (1) Phase 1: selection of TTA factors and the measures of ET, TTA, and bargaining power (BP) dimension; (2) Phase 2: correlation analysis between the measures of ET and TTA dimension (evaluation of TTA dimension based on the measures of ET); (3) Phase 3: evaluation of TTA dimension based on the measures of BP dimension. The quantitative weights of criteria, TTA factors and sub-factors are provided and they indicate the order of priority and the degree of importance for TTA. The results are interpreted in terms of the ET and BP dimensions of measures that need to be considered in order to provide assistance at the time of decision-making on adoption of technology transfer by companies.     

TTA结构数字信号协处理器数据Cache的设计与实现

论文分析了面向多媒体应用的TTA(TransportTriggeredArchitecture)微处理器的特点和访存要求,提出并设计实现了应用于此款微处理器、采用直接映象规则、写回和按写分配策略的4KB数据Cache,并在全系统环境下对其进行了模拟验证。实验结果说明数据Cache系统在降低命中时间和提高命中率两方面做到了良好的折中,命中时间与芯片流水线处理周期匹配,有效保证了全系统性能的发挥。     

Exploring the potential of unobtrusive proactive task support

This research concerns how to make task-related online resources accessible to users in a convenient manner in the context of work. It explores the potential of proactive but relatively unobtrusive task support: based on task progress, advice is displayed in separate and persistently present advice windows side-by-side to the Task Window, and the display is updated intermittently. The proposed approach is illustrated with a prototype, Telephone Triage Assistant (TTA), for supporting junior nurses' triage task. The usefulness and usability of TTA were assessed based on the results of an exploratory study at a medical call centre. Results show that subjects seemed to have spent a significant portion of the task time on TTA, and felt mostly positive about TTA. There was also a great deal of overlap between subjects' line of questioning and advice from TTA.     

Transystem tracing arrays: A macroflow analysis technique

The transystem tracing array (TTA) is the basic building block for a transystem flow analysis technique. It helps analyse and document the flow through a processing system. The TTA technique has helped improve the handling of system changes, diagnosis of data errors and system bugs, and user-analyst communication. It has provided a simple and clear method for obtaining a brief and unambiguous overview of the trace (flow) through an entire system. TTAs are very easy to understand; they help users and analysts avoid bogging down in numerous system details of secondary interest, while maintaining a system-wide scale of perspective. The TTA technique is well suited to both the computerized portion of information systems and to manual office tasks for forms processing. The TTA method is built on a novel technique of collapsing complex composite dimensional arrays into simple two-way arrays.     

基于X3D和GPS的立交区域车辆监控框架

针对立交区域的监控系统难以准确实时地对车辆进行监控的问题,该文以X3D和XML为基础,提出在真三维环境中进行车辆监控的技术框架。框架集成三维建模技术、X3D技术、差分GPS技术、数据库技术和车辆运动模型,对行驶在立交区域的车辆进行实时监控,准确定位当前车辆的具体路段。实验证明框架是可行的,可用于车辆监控及交通仿真和车辆行为的分析模拟。     

Role of triplet‐triplet annihilation in highly efficient fluorescent devices

Abstract— A study of delayed electroluminescence in model highly efficient OLEDs based on anthracene derivatives indicate that triplet‐triplet annihilation (TTA) contributes significantly to overall efficiency. Highly efficient devices (6–9% external quantum efficiencies) based on 9,10‐bis(2‐naphthyl)‐2‐phenylanthracene show that the TTA contribution depends primarily on operating current density, reaching as much as 20–30% of the overall emission intensity at moderate current densities (>5 mA/cm²). Revision of the classical estimates of maximum external quantum efficiency of fluorescent OLEDs to 8% and maximum internal quantum efficiency to 40% is recommended to account for TTA contribution (even further revision may be necessary to account for a better‐than‐20% optical outcoupling).     

基于线性扫描算法的TTA编译器优化

提出将线性扫描算法用于传输触发体系结构(TTA)编译器的后端优化设计中,实现全局寄存器分配。线性扫描算法的应用使TTA编译器具有生成目标代码质量高、算法的时间和空间复杂度低、易于实现等优点。实验结果表明,该算法在寄存器数目相同,且有大量的变量竞争时具有明显优势。     

基于热扩散模型的测试程序分类

提出基于热扩散模型的测试程序分类方法,根据峰值温度的高低对SPEC CPU2000的测试程序进行分类。讨论测试程序的热扩散特征和程序行为之间的对应关系。实验结果表明基于热扩散模型分类是一种有效的程序分类方法,其分类结果为不同类型多线程工作负载的组合提供了参考。