摘要：Energetic particle radiation diagnoses mainly detect the particles(such as neutrons,gamma rays,hard X-rays,and escaping electrons)that are radiated in the discharge process of the experimental advanced superconducting tokamak device to characterize the operating state of the plasma in real *** upgrading of these diagnoses requires new instruments based on national(here,“national”means developed and produced by a Chinese company)core chips and open-source software with advanced digitization,a high sampling rate,and a high time *** new spectroscopy system designed in this study adopts the national field-programmable gate array(FPGA)and an analog-to-digital converter as the core chip,and it is developed using Qt on *** communication between the FPGA and embedded controller occurs via a high-speed peripheral component interconnect eXtension for instrument express protocol with a direct memory access *** this basis,the time resolution of the system is improved from 2 to 1 ms,the maximum channel address is increased to 4096,and the sampling rate is increased from 10 to 80 *** experiments of the spectroscopy system with 152Eu and 137Cs sources demonstrate that the best energy resolution is 0.27%and the measurement error is less than±0.5 keV.

摘要：In order to discover new generation of triazole antifungal agents,a series of novel antifungal triazoles were designed and synthesized by structural simplification of our previously identified triazolepiperdine-heterocycle lead *** target compounds showed good antifungal activity with a broad *** particular,compound 71 was highly active against Candida albicans and Candida ***,compound 71 showed potent in vivo antifungal efficacy in the Caenorhabditis *** infection model.

摘要：According to the principle of polarization imaging and the relation between Stokes parameters and the degree of linear polarization, there are much redundant and complementary information in polarized images. Since man-made objects and natural objects can be easily distinguished in images of degree of linear polarization and images of Stokes parameters contain rich detailed information of the scene, the clutters in the images can be removed efficiently while the detailed information can be maintained by combining these images. An algorithm of adaptive polarization image fusion based on regional energy dynamic weighted average is proposed in this paper to combine these images. Through an experiment and simulations,most clutters are removed by this algorithm. The fusion method is used for different light conditions in simulation, and the influence of lighting conditions on the fusion results is analyzed.

摘要：为在设计阶段更合理地确定全长黏结锚杆极限荷载,在前人的研究成果基础上,以在建高速公路项目土质挖方边坡为研究对象,基于FLAC3D,提出了在设计阶段通过数值分析研究拉拔力加荷与锚杆位移及位移增量双重判据的关系以确定极限荷载的方法。首先建立边坡模型分析加固前后的边坡稳定性,得到设计锚固力;然后分析不同加荷工况下的位移及位移增量关系,通过拐点法和规范法共同确定极限荷载,并提取锚杆轴向力获得水泥浆与锚杆界面的剪应力,分析界面剪应力与锚固深度的关系;最后通过施工阶段的拉拔试验进行对比校核。对比结果显示,在土体及加固锚杆物理力学参数准确的前提下,通过数值模拟分析不同加荷工况下的锚杆端头部位移及位移增量与荷载的关系确定出的极限荷载与拉拔试验最终确定的极限荷载完全一致。这说明,在设计阶段完全可通过数值分析确定不同岩土体情况下锚杆的极限拉拔荷载,并对设计锚固力与极限荷载进行数值对比,当设计锚固力大于极限荷载时再考虑施加预应力或选择其他支护形式,解决了设计中由于无法确定极限荷载而采用固定设计值导致设计偏保守的难题,进一步提升了设计阶段指导施工的准确性与合理性。

摘要：通过总结和比较明挖法、盖挖法及浅埋暗挖法在浅埋地形下的适用性,结合沟谷地形特征和地质情况,提出隧道在穿越沟谷浅埋段时应分区设计施工方案,并对过渡段在施工及支护方面的差异进行分析和对策探讨。结果表明:以超浅埋界限深度和浅埋界限深度作为U、V形沟谷施工方法选取的界限是切实可行的;采用设置变形缝或预留变形量的措施能有效消除结构间刚度差异;桩长渐变是结构基础埋深差异过渡的可行方案。

摘要：为了提高高速公路的造价控制水平,首先分析了工程定额测定的意义、基本原则及依据,随后分析了写实记录法、测时法、施工实测法、比较类推法等在定额测定中的具体应用,并从准备阶段、实施阶段、验证阶段三方面阐述了定额测定流程。最后,以宝岩河大桥为研究对象,将测定消耗量与定额消耗量进行对比,求出了定额测定误差,研究成果可为类似项目的定额测定提供理论指导。

摘要：基于SONY公司85万像素的图像传感器套件,采用CCD+DSP+FPGA配合单片机的构架完成了视频信号的采集、处理、显示和控制。首先使用单片机给时序信号发生器和DSP初始化,系统正常工作后完成视频信号的采集、A/D转换,输出原始数据信号送给DSP处理,得到YUV422格式信号给FPGA。FPGA采用两片SDRAM作为帧缓存,将帧率从15帧/秒提升到60帧/秒,从而可使图像传感器采集的图像在VGA显示器上实时显示。

摘要：差分衰减分析技术(Differential Die-away Analysis,DDAA)可用于特殊核材料(Special Nuclear Materials,SNM)主动探测分析,无论核材料是否置于屏蔽体内,它皆可通过外加脉冲中子诱发核材料发生裂变来揭示核材料的存在。通过Geant4蒙特卡罗模拟软件设计基于DDAA技术的SNM探测系统,优化探测系统关键参数以及系统不同几何布置,获得探测系统达到最优灵敏度时的几何结构参数。计算结果表明,当探测系统的几何参数选择压强为0.405 3 MPa、直径5.08 cm的3He管,3He管外包裹密度为1.10 g·cm^(-3)、厚度为4 cm的慢化体,样品周围采用厚度为7 cm、密度为0.85 g·cm^(-3)的慢化体时,可达到1 g的235U核材料高灵敏探测。计算结果对基于DDAA技术的SNM探测系统的参数设计具有重要意义。

摘要：Higher requirements for the accuracy of relevant models are put throughout the transformation and upgrade of the iron and steel sector to intelligent *** has been difficult to meet the needs of the field with the usual prediction model of mechanical properties of hotrolled *** data and difficult parameter adjustment limit deep learning models based on multi-layer networks in practical applications;besides,the limited discrete process parameters used make it impossible to effectively depict the actual strip processing *** order to solve these problems,this research proposed a new sampling approach for mechanical characteristics input data of hot-rolled strip based on the multi-grained cascade forest(gcForest)*** to the characteristics of complex process flow and abnormal sensitivity of process path and parameters to product quality in the hot-rolled strip production,a three-dimensional continuous time series process data sampling method based on time-temperature-deformation was *** basic information of strip steel(chemical composition and typical process parameters)is fused with the local process information collected by multi-grained scanning,so that the next link’s input has both local and global ***,in the multi-grained scanning structure,a sub sampling scheme with a variable window was designed,so that input data with different dimensions can get output characteristics of the same dimension after passing through the multi-grained scanning structure,allowing the cascade forest structure to be trained ***,actual production data of three steel grades was used to conduct the experimental *** results revealed that the gcForest-based mechanical property prediction model outperforms the competition in terms of comprehensive performance,ease of parameter adjustment,and ability to sustain high prediction accuracy with fewer samples.

摘要：为了跟踪国内外海上水面自主船舶(MASS)发展进程,深化对MASS自主性的理解,对国内外MASS在标准规范及科研项目上的发展进行梳理;通过绘制时间尺度上的人机运行机制图对MASS自主性进行解析并以航行感知系统为例进行实例化解读;对MASS的风险评估、模型基础、试验实践内容进行展望。总结分析目前MASS现状和主要问题,提出MASS的3种自主运行模式,为MASS的详细设计及未来发展提供依据和思路。