HMX粒度对其机械感度的影响研究

本文分别采用H3．5-10W落锤式撞击感度仪和摆式摩擦感度仪对不同粒度HMX的撞击感度和摩擦感度进行了实验研究，得到了相应的变化规律，并对实验结果进行了分析。     

疑是银河落德天

德天跨国大瀑布源起广西靖西县归春河,终年有水。流入越南又回流广西,经大新县德天村处遇断崖跌落而成瀑布。这里距大新县城78公里。距首府南宁市140多公里。景点距中越边境53号碑约50米。主体瀑布宽100米,纵深60米,三级落差约50米,与越南的板约瀑布连为一体。瀑布总宽200余米,是东南亚最大的天然瀑布也是世界第二大跨国瀑布。     

An Elastic Architecture Adaptable to Various Application Scenarios

The quantity of computer applications is increasing dramatically as the computer industry prospers. Meanwhile, even for one application, it has different requirements of performance and power in different scenarios. Although various processors with different architectures emerge to fit for the various applications in different scenarios, it is impossible to design a dedicated processor to meet all the requirements. Furthermore, dealing with uncertain processors significantly aggravates the burden of programmers and system integrators to achieve specific performance/power. In this paper, we propose elastic architecture （EA） to provide a uniform computing platform with high elasticity, i.e., the ratio of worst-case to best-case performance/power/performance-power trade-off, which can meet different requirements for different applications. It is achieved by dynamically adjusting architecture parameters （instruction set, branch predictor, data path, memory hierarchy, concurrency, status~zcontrol, and so on） on demand. The elasticity of our prototype implementation of EA, as Sim-EA, ranges from 3.31 to 14.34, with 5.41 in arithmetic average, for SPEC CPU2000 benchmark suites, which provides great flexibility to fulfill the different performance and power requirements in different scenarios. Moreover, Sim-EA can reduce the EDP （energy-delay product） for 31.14% in arithmetic average compared with a baseline fixed architecture. Besides, some subsequent experiments indicate a negative correlation between application intervals＇ lengths and their elasticities.     

Prevention from Soft Errors via Architecture Elasticity

Due to the decreasing threshold voltages, shrinking feature size, as well as the exponential growth of on-chip transistors, modern processors are increasingly vulnerable to soft errors. However, traditional mechanisms of soft error mitigation take actions to deal with soft errors only after they have been detected. Instead of the passive responses, this paper proposes a novel mechanism which proactively prevents from the occurrence of soft errors via architecture elasticity. In the light of a predictive model, we adapt the processor architectures h01istically and dynamically. The predictive model provides the ability to quickly and accurately predict the simulation target across different program execution phases on any architecture configurations by leveraging an artificial neural network model. Experimental results on SPEC CPU 2000 benchmarks show that our method inherently reduces the soft error rate by 33.2% and improves the energy efficiency by 18.3% as compared with the static configuration processor.     

基于LoRa协议的智能防溜系统多信道数据通信

设计了一种基于LoRa协议的多信道智能防溜系统,实现了对智能铁鞋业务数据的实时、可靠上传。通过无线数据终端构建多级、多信道通信网络、业务数据及心跳数据以多种信道方式传输,数据有序上传,对不同来源、优先级数据打包发送,优先发送智能铁鞋溜逸数据帧。该数据传输方法实现了智能铁鞋数据的快速、可靠传输,有利于提高对站场智能铁鞋的管理效率,具有很高的理论意义和实用价值。     

空气加热管路的管材校核计算及管形设计

本文针对自行设计的气体爆炸试验装置中的空气加热管路部分所选用的管材进行了校核计算及管形设计,通过实验证明能达到设计要求,并对实验中出现的问题进行了分析。     

创意与时俱进

接触摄影是在20世纪90年代初，当时使用“乐凯”黑白盘片，“公元”光面照片纸自学黑白暗房，在一盏昏暗的红灯下品尝显影的乐趣。10年后，数码摄影技术迅猛发展，将摄影推向一个新顶点，于是，我在退休之际放弃了胶片，决心学习数码摄影。     

片上多核处理器存储一致性验证

存储一致性验证是片上多核处理器功能验证的重要部分.由于验证并行程序的执行结果是否符合存储一致性模型理论上是NP难问题,现有的验证方法中只能采用一些时间复杂度大于O(n3)的不完全方法.发现在支持写原子性的多处理器系统中,两条执行时间不重叠的操作之间存在确定的时间序.通过引入时间序的概念,设计并实现了一种线性时间复杂度的存储一致性验证工具LCHECK.LCHECK利用时间序将验证局部化,使得在表示程序执行结果的有向图中,序关系边的推导和正确性检测都被限定在有限范围内.与现有其他方法相比,LCHECK时间复杂度低,对程序长度和访存地址数没有限制,因此验证效率更高.作为国产片上多核处理器龙芯3号的重要验证工具, LCHECK发现了一些存储系统的设计错误.     

智能铁鞋定位纠偏及被盗判定的设计与实现

基于位置信息和运动状态数据,设计了一种融合多种数据的智能铁鞋定位纠偏及被盗判定方法。智能铁鞋首先根据位置信息和电子围栏,对自身被盗状态进行判定;然后融合多个位置信息和运动状态数据,实现自身定位信息的偏差纠正;最后通过LoRa通信数据终端将相关数据发送给服务器。该方法提供了一种智能铁鞋定位纠偏和被盗判定的有效手段,有效解决了智能铁鞋的定位漂移问题,提高了智能铁鞋定位的合理性,有利于对智能铁鞋的监控和管理,对保障铁路安全运行具有非常重要的理论意义和实用价值。