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Large-scale spatial data visualization method based on augmented reality
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作者 Xiaoning QIAO Wenming XIE +4 位作者 Xiaodong PENG Guangyun LI Dalin LI Yingyi GUO Jingyi REN 《虚拟现实与智能硬件(中英文)》 EI 2024年第2期132-147,共16页
Background A task assigned to space exploration satellites involves detecting the physical environment within a certain space.However,space detection data are complex and abstract.These data are not conducive for rese... Background A task assigned to space exploration satellites involves detecting the physical environment within a certain space.However,space detection data are complex and abstract.These data are not conducive for researchers'visual perceptions of the evolution and interaction of events in the space environment.Methods A time-series dynamic data sampling method for large-scale space was proposed for sample detection data in space and time,and the corresponding relationships between data location features and other attribute features were established.A tone-mapping method based on statistical histogram equalization was proposed and applied to the final attribute feature data.The visualization process is optimized for rendering by merging materials,reducing the number of patches,and performing other operations.Results The results of sampling,feature extraction,and uniform visualization of the detection data of complex types,long duration spans,and uneven spatial distributions were obtained.The real-time visualization of large-scale spatial structures using augmented reality devices,particularly low-performance devices,was also investigated.Conclusions The proposed visualization system can reconstruct the three-dimensional structure of a large-scale space,express the structure and changes in the spatial environment using augmented reality,and assist in intuitively discovering spatial environmental events and evolutionary rules. 展开更多
关键词 large-scale spatial data analysis Visual analysis technology Augmented reality 3D reconstruction Space environment
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Galaxy Interactions in Filaments and Sheets:Effects of the Large-scale Structures Versus the Local Density
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作者 Apashanka Das Biswajit Pandey Suman Sarkar 《Research in Astronomy and Astrophysics》 SCIE CAS CSCD 2023年第2期197-204,共8页
Major interactions are known to trigger star formation in galaxies and alter their color.We study the major interactions in filaments and sheets using SDSS data to understand the influence of large-scale environments ... Major interactions are known to trigger star formation in galaxies and alter their color.We study the major interactions in filaments and sheets using SDSS data to understand the influence of large-scale environments on galaxy interactions.We identify the galaxies in filaments and sheets using the local dimension and also find the major pairs residing in these environments.The star formation rate(SFR) and color of the interacting galaxies as a function of pair separation are separately analyzed in filaments and sheets.The analysis is repeated for three volume limited samples covering different magnitude ranges.The major pairs residing in the filaments show a significantly higher SFR and bluer color than those residing in the sheets up to the projected pair separation of~50 kpc.We observe a complete reversal of this behavior for both the SFR and color of the galaxy pairs having a projected separation larger than 50 kpc.Some earlier studies report that the galaxy pairs align with the filament axis.Such alignment inside filaments indicates anisotropic accretion that may cause these differences.We do not observe these trends in the brighter galaxy samples.The pairs in filaments and sheets from the brighter galaxy samples trace relatively denser regions in these environments.The absence of these trends in the brighter samples may be explained by the dominant effect of the local density over the effects of the large-scale environment. 展开更多
关键词 methods statistical-methods data analysis-galaxies evolution-galaxies interactions-(cosmology:)large-scale structure of universe
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Regularized focusing inversion for large-scale gravity data based on GPU parallel computing
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作者 WANG Haoran DING Yidan +1 位作者 LI Feida LI Jing 《Global Geology》 2019年第3期179-187,共9页
Processing large-scale 3-D gravity data is an important topic in geophysics field. Many existing inversion methods lack the competence of processing massive data and practical application capacity. This study proposes... Processing large-scale 3-D gravity data is an important topic in geophysics field. Many existing inversion methods lack the competence of processing massive data and practical application capacity. This study proposes the application of GPU parallel processing technology to the focusing inversion method, aiming at improving the inversion accuracy while speeding up calculation and reducing the memory consumption, thus obtaining the fast and reliable inversion results for large complex model. In this paper, equivalent storage of geometric trellis is used to calculate the sensitivity matrix, and the inversion is based on GPU parallel computing technology. The parallel computing program that is optimized by reducing data transfer, access restrictions and instruction restrictions as well as latency hiding greatly reduces the memory usage, speeds up the calculation, and makes the fast inversion of large models possible. By comparing and analyzing the computing speed of traditional single thread CPU method and CUDA-based GPU parallel technology, the excellent acceleration performance of GPU parallel computing is verified, which provides ideas for practical application of some theoretical inversion methods restricted by computing speed and computer memory. The model test verifies that the focusing inversion method can overcome the problem of severe skin effect and ambiguity of geological body boundary. Moreover, the increase of the model cells and inversion data can more clearly depict the boundary position of the abnormal body and delineate its specific shape. 展开更多
关键词 large-scale gravity data GPU parallel computing CUDA equivalent geometric TRELLIS FOCUSING INVERSION
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Trend Analysis of Large-Scale Twitter Data Based on Witnesses during a Hazardous Event: A Case Study on California Wildfire Evacuation
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作者 Syed A. Morshed Khandakar Mamun Ahmed +1 位作者 Kamar Amine Kazi Ashraf Moinuddin 《World Journal of Engineering and Technology》 2021年第2期229-239,共11页
Social media data created a paradigm shift in assessing situational awareness during a natural disaster or emergencies such as wildfire, hurricane, tropical storm etc. Twitter as an emerging data source is an effectiv... Social media data created a paradigm shift in assessing situational awareness during a natural disaster or emergencies such as wildfire, hurricane, tropical storm etc. Twitter as an emerging data source is an effective and innovative digital platform to observe trend from social media users’ perspective who are direct or indirect witnesses of the calamitous event. This paper aims to collect and analyze twitter data related to the recent wildfire in California to perform a trend analysis by classifying firsthand and credible information from Twitter users. This work investigates tweets on the recent wildfire in California and classifies them based on witnesses into two types: 1) direct witnesses and 2) indirect witnesses. The collected and analyzed information can be useful for law enforcement agencies and humanitarian organizations for communication and verification of the situational awareness during wildfire hazards. Trend analysis is an aggregated approach that includes sentimental analysis and topic modeling performed through domain-expert manual annotation and machine learning. Trend analysis ultimately builds a fine-grained analysis to assess evacuation routes and provide valuable information to the firsthand emergency responders<span style="font-family:Verdana;">.</span> 展开更多
关键词 WILDFIRE EVACUATION TWITTER large-scale data Topic Model Sentimental Analysis Trend Analysis
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Semi-supervised Affinity Propagation Clustering Based on Subtractive Clustering for Large-Scale Data Sets
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作者 Qi Zhu Huifu Zhang Quanqin Yang 《国际计算机前沿大会会议论文集》 2015年第1期76-77,共2页
In the face of a growing number of large-scale data sets, affinity propagation clustering algorithm to calculate the process required to build the similarity matrix, will bring huge storage and computation. Therefore,... In the face of a growing number of large-scale data sets, affinity propagation clustering algorithm to calculate the process required to build the similarity matrix, will bring huge storage and computation. Therefore, this paper proposes an improved affinity propagation clustering algorithm. First, add the subtraction clustering, using the density value of the data points to obtain the point of initial clusters. Then, calculate the similarity distance between the initial cluster points, and reference the idea of semi-supervised clustering, adding pairs restriction information, structure sparse similarity matrix. Finally, the cluster representative points conduct AP clustering until a suitable cluster division.Experimental results show that the algorithm allows the calculation is greatly reduced, the similarity matrix storage capacity is also reduced, and better than the original algorithm on the clustering effect and processing speed. 展开更多
关键词 subtractive CLUSTERING INITIAL cluster AFFINITY propagation CLUSTERING SEMI-SUPERVISED CLUSTERING large-scale data SETS
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The 8×10 GHz Receiver Optical Subassembly Based on Silica Hybrid Integration Technology for Data Center Interconnection 被引量:3
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作者 Chao-Yi Li Jun-Ming An +8 位作者 Jiu-Qi Wang Liang-Liang Wang Jia-Shun Zhang Jian-Guang Li Yuan-Da Wu Yue Wang Xiao-Jie Yin Yong Li Fei Zhong 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第10期39-43,共5页
An 8×10 GHz receiver optical sub-assembly (ROSA) consisting of an 8-channel arrayed waveguide grating (AWG) and an 8-channel PIN photodetector (PD) array is designed and fabricated based on silica hybrid in... An 8×10 GHz receiver optical sub-assembly (ROSA) consisting of an 8-channel arrayed waveguide grating (AWG) and an 8-channel PIN photodetector (PD) array is designed and fabricated based on silica hybrid integration technology. Multimode output waveguides in the silica AWG with 2% refractive index difference are used to obtain fiat-top spectra. The output waveguide facet is polished to 45° bevel to change the light propagation direction into the mesa-type PIN PD, which simplifies the packaging process. The experimentM results show that the single channel I dB bandwidth of AWG ranges from 2.12nm to 3.06nm, the ROSA responsivity ranges from 0.097 A/W to 0.158A/W, and the 3dB bandwidth is up to 11 GHz. It is promising to be applied in the eight-lane WDM transmission system in data center interconnection. 展开更多
关键词 AWG GHz receiver Optical Subassembly Based on Silica Hybrid Integration Technology for data Center Interconnection The 8 PD
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Switched-mode AGC circuits with internally created reset module for burst-mode unbalanced data optical receiver
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作者 Wang Rong Wang Zhigong +2 位作者 Wang Weibai Xu Jian Guan Zhiqiang 《High Technology Letters》 EI CAS 2011年第3期317-324,共8页
This paper presents an innovative switched-mode auto gain control (AGC) circuit with internally created reset module for DC-10Mb/s burst-mode unbalanced (BMU) optical data transmission. Conventional AGC circuit is... This paper presents an innovative switched-mode auto gain control (AGC) circuit with internally created reset module for DC-10Mb/s burst-mode unbalanced (BMU) optical data transmission. Conventional AGC circuit is inappropriate for BMU data transmission because it is based on average level detection and requires considerable time to settle on a predefined gain. Therefore, we adopt a fast switched-mode AGC based on peak level detection. After the gain is adjusted, the peak level detectors need to re-detect the peak level of the input signal. Thus, we develop an internally created reset module. This AGC with reset module exhibits a fast operation and achieves an adjusted stable gain within one-bit, avoiding any bit loss up to 10Mb/s data rate. During power-up, the peak level detectors possibly hold an uncertain level resulting in the bit-errors. We propose a power-up reset circuit to solve this problem. Designed in a 0.5μm CMOS technology, the circuit achieves an optical sensitivity of better than -30dBm and a wide dynamic range of over 30dB with a power dissipation of only 30 mW from a 5V supply. 展开更多
关键词 burst-mode unbalanced (BMU) data optical receiver auto gain control (AGC) internally created reset module bit loss
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一种集成DFE和CDR的56 Gbit/s PAM-4 SerDes接收机设计
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作者 郭嘉乐 张长春 +1 位作者 张翼 王静 《微电子学》 CAS 北大核心 2024年第3期450-457,共8页
基于65 nm CMOS工艺设计了一款1/4速率56 Gbit/s PAM-4 SerDes接收机,该接收机集成了可变增益放大、连续时间线性均衡(CTLE)、判决反馈均衡(DFE)、自适应阈值电压跟踪和无参考时钟数据恢复(CDR)等电路。可变增益放大技术被用来对接收信... 基于65 nm CMOS工艺设计了一款1/4速率56 Gbit/s PAM-4 SerDes接收机,该接收机集成了可变增益放大、连续时间线性均衡(CTLE)、判决反馈均衡(DFE)、自适应阈值电压跟踪和无参考时钟数据恢复(CDR)等电路。可变增益放大技术被用来对接收信号进行幅度调节;CTLE和2抽头DFE被用来进行信道畸变补偿;自适应阈值电压跟踪技术用来确定最优的PAM-4信号判决电平;无参考时钟CDR技术则在无外部参考时钟的前提下,被用来产生最佳判决时钟,同时基于边沿检测技术有效降低了PAM-4信号非对称电平转换引起的时钟抖动。后仿真结果表明,在1.2 V电源电压下,所设计的PAM-4接收机能够实现6.75~20.75 dB的可调增益范围和高达16 dB@14 GHz的信道高频衰减补偿,且在16.1 dB@14 GHz信道下,CDR提取出的7 GHz时钟抖动峰峰值为7.21 ps。工作于56 Gbit/s速率下,接收机功耗为227 mW,能效为4.05 pJ/bit。 展开更多
关键词 四电平脉冲幅度调制 SerDes接收机 判决反馈均衡器 时钟数据恢复 阈值电压跟踪
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基于热重力改正的接收函数与重力联合估计技术及福建地区的应用
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作者 唐晗晗 郭良辉 李永华 《地球物理学报》 SCIE EI CAS CSCD 北大核心 2024年第7期2668-2682,共15页
接收函数与重力联合估计技术是获取台站下方地壳厚度和波速比参数的一种有效手段,重力数据的引入可改善传统接收函数H-κ叠加法在壳内多次波信号不清晰时估计不准的问题.在大地热流较高的地区,热重力扰动成为布格重力异常的不可忽略的... 接收函数与重力联合估计技术是获取台站下方地壳厚度和波速比参数的一种有效手段,重力数据的引入可改善传统接收函数H-κ叠加法在壳内多次波信号不清晰时估计不准的问题.在大地热流较高的地区,热重力扰动成为布格重力异常的不可忽略的重要组成部分,此时常规接收函数与重力联合估计技术并不适用.本文给出基于热重力改正的接收函数与重力联合估计技术,通过热重力改正削弱热异常对重力数据的影响,同时采用接收函数Ps震相与重力数据的联合约束算法,避免多次波不清晰而引入误差的问题,实现高热流背景地区地壳厚度和波速比的有效估计.模型测试验证了本文技术的有效性和稳健性,给出了启动热重力改正的阈值(-10 mGal).典型高热流背景的福建地区实际数据应用结果表明,福建地区地壳向沿海地区减薄(约28 km),闽西和闽东南地区泊松比偏高(>0.26),暗示其下方存在地壳减薄的同时伴随着幔源物质的底侵. 展开更多
关键词 热重力 接收函数与重力联合估计 福建地区 地壳厚度 波速比
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基于智能手机的手持式树上苹果果径测量系统设计与试验
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作者 武振超 史宇飞 +3 位作者 贺磊磊 李瑞 CHEN Chao 傅隆生 《农业机械学报》 EI CAS CSCD 北大核心 2024年第10期31-36,50,共7页
为解决现有接触式果径测量过程耗时,长时间测量精度容易受试验人员主观影响的问题,结合机械设计、串口通信、自动控制等技术设计了一款手持式树上苹果果径测量系统。该系统由手持式果径测量工具和数据接收APP两部分组成。在果园树上果... 为解决现有接触式果径测量过程耗时,长时间测量精度容易受试验人员主观影响的问题,结合机械设计、串口通信、自动控制等技术设计了一款手持式树上苹果果径测量系统。该系统由手持式果径测量工具和数据接收APP两部分组成。在果园树上果径测量作业时,试验人员手持果径测量工具的握柄,通过按压握柄带动传动模块,夹持爪随之张开,从而实现夹持爪与被测果实表面贴合及果径测量,并通过蓝牙通讯来将数据传输到手机端APP以进行保存、删减、位置信息绑定及批量导出等操作。为衡量手持式果径测量工具精度,分别进行公制块规和苹果果径测量试验。公制块规测量试验结果表明,本文所提出的尺寸测量工具实现了亚毫米级别精度测量。苹果果径测量试验结果表明,测量误差随着果实尺寸的增加而增加,在测量成熟期果实时,尺寸测量工具获取结果的平均绝对误差(Mean square error,MAE)及均方根误差(Root mean squared error,RMSE)仍可控制在0.45 mm以下,可满足苹果果径测量精度需求。 展开更多
关键词 苹果 果径测量系统 智能手机 数据接收APP 果径测量工具 夹持爪
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一款0.16 mm^(2)基于180 nm CMOS采用全局去偏斜的半速率8×2.5 Gb/s时钟转发架构接收机
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作者 杨力宏 李世新 +4 位作者 韩晨曦 云越恒 刘术彬 赵潇腾 朱樟明 《集成电路与嵌入式系统》 2024年第4期1-9,共9页
在时钟转发架构的高速有线通信接收机中,需要去偏斜电路实现时钟与数据之间的最佳采样关系,并保证多路数据的同步。本文提出了一种全局去偏斜方案,仅采用一路数据与时钟进行对齐,并通过时钟延时匹配与分布技术实现多路数据同步,减小了... 在时钟转发架构的高速有线通信接收机中,需要去偏斜电路实现时钟与数据之间的最佳采样关系,并保证多路数据的同步。本文提出了一种全局去偏斜方案,仅采用一路数据与时钟进行对齐,并通过时钟延时匹配与分布技术实现多路数据同步,减小了各通道独立去偏斜方案带来的功耗与面积开销。所提出的接收机由8路数据通道、1路半速率转发时钟通道与基于延迟锁定环路的全局去偏斜电路构成。基于180 nm CMOS工艺,在2.5 Gb/s数据率下,可去除输入时钟与数据任意偏斜,得到位于数据中心的采样相位,同时具有时钟占空比校准能力。在1.8 V电源电压下,所提出的接收机总功耗为187 mW,总面积为0.16 mm^(2),对比各通道独立去偏斜方案,功耗和面积开销分别节约了45.2%与62.8%。 展开更多
关键词 时钟转发 多路接收机 全局去偏斜 延迟锁定环路 时钟分布 数据同步 半速率
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基于深度学习与RSS滤波的可见光室内定位算法
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作者 曹海锋 王晓亮 《光学技术》 CAS CSCD 北大核心 2024年第3期361-367,共7页
为了提高可见光室内三维定位的准确率与稳定性,提出一种基于深度学习与接收信号强度滤波的可见光室内定位方法。首先,采集每个参考点接收的所有接收信号强度样本,使用聚类算法对接收信号强度样本进行滤波,剔除低值簇与高值簇中的高偏差... 为了提高可见光室内三维定位的准确率与稳定性,提出一种基于深度学习与接收信号强度滤波的可见光室内定位方法。首先,采集每个参考点接收的所有接收信号强度样本,使用聚类算法对接收信号强度样本进行滤波,剔除低值簇与高值簇中的高偏差接收信号强度样本;然后,在高精度无线电地图上训练深度神经网络回归模型,学习接收器位置与接收信号强度样本之间的统计关系。仿真结果表明,方法在6m×6m×3m室内环境下的平均定位误差小于4cm,且支持LED数量的扩展。 展开更多
关键词 深度学习 数据聚类 无线电地图 接收信号强度 数据滤波
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基于ZYNQ的四通道数据采集系统设计
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作者 罗瑶 李亚柯 +1 位作者 王玉香 陈镇山 《光电子技术》 CAS 2024年第2期140-144,151,共6页
针对接收设备普遍价格昂贵且集成度不够高的问题,设计一种基于低成本高集成度的四通道ADS-B接收机。该设备在业内首先实现了低成本的实时信号采集、板上多频段ADS-B实时解码等功能于一体的四通道小型射频接收设备。设备以ZYNQ-7000系列... 针对接收设备普遍价格昂贵且集成度不够高的问题,设计一种基于低成本高集成度的四通道ADS-B接收机。该设备在业内首先实现了低成本的实时信号采集、板上多频段ADS-B实时解码等功能于一体的四通道小型射频接收设备。设备以ZYNQ-7000系列芯片为主控芯片,设计包含射频前端接收电路模块、信号采集电路模块、高速大容量的数据存储模块等,实现对ADS-B等目标信号的高速采样及处理。测试结果表明,该接收机可成功接收并解调ADS-B长报文信号,为高性能数据采集及实时信号处理提供了一套低成本低功耗整体解决方案。 展开更多
关键词 接收机 低成本接收设备 数据采集
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气象卫星遥感数据接收异常诊断系统设计
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作者 杨昆 付浩 +2 位作者 王雪迪 吴琼 吴瑾 《计算机测量与控制》 2024年第11期9-17,共9页
在传输气象卫星遥感数据的过程中,为了解决由干扰或衰减引起的信号质量下降对气象卫星遥感数据接收故障诊断精确性的影响,研究设计一种基于规则匹配的气象卫星遥感数据接收故障诊断系统;该系统硬件单元分别为卫星数据接收故障诊断框架... 在传输气象卫星遥感数据的过程中,为了解决由干扰或衰减引起的信号质量下降对气象卫星遥感数据接收故障诊断精确性的影响,研究设计一种基于规则匹配的气象卫星遥感数据接收故障诊断系统;该系统硬件单元分别为卫星数据接收故障诊断框架搭建单元、卫星数据接收状态监控单元、卫星数据接收故障推理机设计单元与卫星数据接收故障诊断报告生成器设计单元;系统软件部分首先对卫星数据接收状态信号预处理,提取接收状态信号与接收故障信号的特征,设计卫星数据接收故障诊断规则库,基于规则匹配实现卫星数据接收故障诊断;系统的主要参数包括信号预处理算法、特征提取方法、故障诊断规则库的构建以及推理机的逻辑设计;实验数据显示,应用设计系统获得的卫星数据接收状态信号特征提取结果与实际接收状态信号特征相同,卫星数据接收故障诊断结果与实际接收故障诊断结果相同,证实了设计系统的有效性。 展开更多
关键词 气象卫星 故障诊断 地面接收站 规则匹配 遥感数据 接收设备
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基于LoRa的果园管道自动顺序喷雾系统研究
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作者 胡圣洋 陈泽鸿 +4 位作者 刘伟康 代秋芳 刘洪山 宋淑然 李震 《农机化研究》 北大核心 2025年第2期171-175,共5页
我国南方果园多处于山地,大型喷雾器械无法进入,为实现山地果园自动顺序喷药,设计了一种基于LoRa无线通信技术的管道自动顺序喷雾系统。系统以Stm32单片机为核心,在管网上部署了6个电磁阀控制节点,采用LoRa无线收发模块进行节点之间的通... 我国南方果园多处于山地,大型喷雾器械无法进入,为实现山地果园自动顺序喷药,设计了一种基于LoRa无线通信技术的管道自动顺序喷雾系统。系统以Stm32单片机为核心,在管网上部署了6个电磁阀控制节点,采用LoRa无线收发模块进行节点之间的通信,设计程序控制6个电磁阀依次按顺序打开,并可以通过手机APP远程开启系统。试验结果表明:当节点之间距离为250 m时,数据接收率为95%;系统通信距离远,数据接收率高,具有较高的可靠性,适合于山地果园中使用。 展开更多
关键词 果园 顺序喷雾 LoRa无线通信 远程控制 通信距离 数据接收率
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基于MATLAB建模的电磁兼容测试中接收机数字化设计
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作者 殷广 高阳 +1 位作者 余旭东 朱晨迪 《自动化与仪表》 2024年第7期11-14,31,共5页
随着虚拟仪器的快速发展,对如何将虚拟仪器的可定制性、易扩展、价格低廉等优势应用于电磁兼容测试的接收机进行了研究。通过让数字化虚拟仪器部分取代乃至完全取代传统仪器,已成为日后电磁兼容技术革新的关注焦点。基于MATLAB软件搭建... 随着虚拟仪器的快速发展,对如何将虚拟仪器的可定制性、易扩展、价格低廉等优势应用于电磁兼容测试的接收机进行了研究。通过让数字化虚拟仪器部分取代乃至完全取代传统仪器,已成为日后电磁兼容技术革新的关注焦点。基于MATLAB软件搭建了接收机的模型,实现了接收机的数字化设计。其中中频滤波器的滤波窗函数采用高斯函数,带宽通过修正系数拟合;检波器经过傅里叶变换,实现信号的频谱计算以及包络线绘制。模型通过频选信号的变化,能够实现峰值和平均值两种检波效果。实际测试结果与模型仿真结果误差小于10%,符合企业测试要求。该模型具有较强的扩展性与兼容性,能对整车与高低压零部件的电磁兼容问题进行一定的监测,设计经验对后续电磁兼容测试过程整体数字化发展有着重要意义。 展开更多
关键词 EMI接收机 电磁兼容 信号采集 数据处理 数字化 中频滤波器
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Correlation-aware probabilistic data summarization for large-scale multi-block scientific data visualization
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作者 Yang Yang Kecheng Lu +2 位作者 Yu Wu Yunhai Wang Yi Cao 《Computational Visual Media》 SCIE EI CSCD 2023年第3期513-529,共17页
In this paper,we propose a correlationaware probabilistic data summarization technique to efficiently analyze and visualize large-scale multi-block volume data generated by massively parallel scientific simulations.Th... In this paper,we propose a correlationaware probabilistic data summarization technique to efficiently analyze and visualize large-scale multi-block volume data generated by massively parallel scientific simulations.The core of our technique is correlation modeling of distribution representations of adjacent data blocks using copula functions and accurate data value estimation by combining numerical information,spatial location,and correlation distribution using Bayes’rule.This effectively preserves statistical properties without merging data blocks in different parallel computing nodes and repartitioning them,thus significantly reducing the computational cost.Furthermore,this enables reconstruction of the original data more accurately than existing methods.We demonstrate the effectiveness of our technique using six datasets,with the largest having one billion grid points.The experimental results show that our approach reduces the data storage cost by approximately one order of magnitude compared to state-of-the-art methods while providing a higher reconstruction accuracy at a lower computational cost. 展开更多
关键词 correlation-awareness large-scale data multi-block methods probabilistic data summarization
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LNG储罐综合监控系统研发
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作者 文涛 冯贵荣 《石油化工自动化》 CAS 2024年第1期16-20,共5页
当前国内储罐状态相关的监测系统与LNG储罐仪表测量系统相互独立设置、不兼容,各系统均独立运行,无法为安全生产运行及决策提供更加充分的依据,提出了将多套独立监控运行的软件集成为1套监控系统软件来实现对LNG储罐的精细化管理的相关... 当前国内储罐状态相关的监测系统与LNG储罐仪表测量系统相互独立设置、不兼容,各系统均独立运行,无法为安全生产运行及决策提供更加充分的依据,提出了将多套独立监控运行的软件集成为1套监控系统软件来实现对LNG储罐的精细化管理的相关技术。介绍了LNG储罐综合监控系统的总体设计,以及7个子系统功能,通过建立该综合监控系统不同子系统模型,将工艺条件变化后系统间相互的影响和变化直观展示,实现罐区异常状态下原因的快速分析和决策响应。 展开更多
关键词 LNG罐区管理 综合监控系统 LNG接收站 数据模型
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基于FPGA的OFDM接收机处理数据高速传输系统
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作者 申育槐 杨环 刘棚 《现代信息科技》 2024年第3期79-83,88,共6页
根据正交频分复用(OFDM)接收机处理数据的高速传输需求,设计一种基于FPGA万兆以太网的高速传输系统。系统对子带、窄带和频谱子信道数据进行处理和储存,按照规定的自定义协议将数据组包,采用UDP/IP协议栈对数据包网络数据打包,通过万兆... 根据正交频分复用(OFDM)接收机处理数据的高速传输需求,设计一种基于FPGA万兆以太网的高速传输系统。系统对子带、窄带和频谱子信道数据进行处理和储存,按照规定的自定义协议将数据组包,采用UDP/IP协议栈对数据包网络数据打包,通过万兆光口传输至服务器。测试结果表明,该方案能够通过指定的协议高速实时地将多种信道化数据传输至服务器,实时传输速率高达5.7千兆字节/秒。该系统稳定性高、数据实时性高、控制时序精确,适合作为OFDM接收机处理数据的传输系统。 展开更多
关键词 FPGA 数据高速传输 UDP/IP OFDM接收机
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Large-scale data archiving: At the interface of archive science and computer science
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作者 Chaolemen Borjigin Qingwen Jin 《Data Science and Informetrics》 2023年第3期1-17,共17页
Both computer science and archival science are concerned with archiving large-scale data,but they have different focuses.Large-scale data archiving in computer science focuses on technical aspects that can reduce the ... Both computer science and archival science are concerned with archiving large-scale data,but they have different focuses.Large-scale data archiving in computer science focuses on technical aspects that can reduce the cost of data storage and improve the reliability and efficiency of Big Data management.Its weaknesses lie in inadequate and non-standardized management.Archiving in archival science focuses on the management aspects and neglects the necessary technical considerations,resulting in high storage and retention costs and poor ability to manage Big Data.Therefore,the integration of large-scale data archiving and archival theory can balance the existing research limitations of the two fields and propose two research topics for related research-archival management of Big Data and large-scale management of archived Big Data. 展开更多
关键词 data archiving Archive Science Computer Science large-scale data data storage
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