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光学译码器编码条接收效果蒙特卡罗模拟
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作者 王军 崔晓钰 《仪器仪表学报》 EI CAS CSCD 北大核心 2006年第z1期653-654,共2页
为了得到光学译码器编码条的光接收效果,使用蒙特卡罗方法对一特定尺寸的发光二极管封装结构及编码条进行了模拟研究。结果表明:编码条所接收到的光源发射的光子数目大约占发射光子数的16.3%。光接收效果与光源和编码条位置的选择以及... 为了得到光学译码器编码条的光接收效果,使用蒙特卡罗方法对一特定尺寸的发光二极管封装结构及编码条进行了模拟研究。结果表明:编码条所接收到的光源发射的光子数目大约占发射光子数的16.3%。光接收效果与光源和编码条位置的选择以及封装结构的构造有很大的关系,因此要提高编码条的光接收效果,有必要合理构造发光二级管光学封装结构并调整编码条的位置。 展开更多
关键词 蒙特卡罗模拟 光学译码器 编码条
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基于磁条编码器的水电机组蠕动监测装置的应用 被引量:1
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作者 王凯 《湖南电力》 2022年第4期60-63,共4页
针对水轮发电机组蠕动现象,设计了一套基于磁条编码器的蠕动监测装置。监测装置通过编码器感应磁条发出的脉冲信号,PLC控制器采集此脉冲信号后进行PLC程序处理和逻辑判断,可高性价比、高精度、高可靠性地实现水轮发电机组的蠕动信号监... 针对水轮发电机组蠕动现象,设计了一套基于磁条编码器的蠕动监测装置。监测装置通过编码器感应磁条发出的脉冲信号,PLC控制器采集此脉冲信号后进行PLC程序处理和逻辑判断,可高性价比、高精度、高可靠性地实现水轮发电机组的蠕动信号监测。同时设计了机组蠕动发生后的保护程序,确保机组的安全稳定运行。 展开更多
关键词 编码 机组蠕动 蠕动监测装置
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磁卡条编码和识读器中的DSP56F80x
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《电子产品世界》 2001年第11期58-59,共2页
关键词 数字信号处理器 磁卡编码 磁卡识读器 DSP56F80x
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207例手术多重编码分析
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作者 刘兰芳 何佩华 《西北国防医学杂志》 CAS 1994年第4期266-267,共2页
手术操作编码作为再现医疗质量的重要内容,在病案首页微机管理中具有很强的统计功能和检索功能.为了进一步做好手术分类工作,提高手术操作编码质量,我们对我院1993年1月至6月的手术操作编码进行了回顾性分析.1
关键词 手术编码 多重编码 手术操作 编码条 修补术 手术方式 探查术 切除术 解剖部位 白内障摘除术
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Fast estimation of fundamental matrix based on stripe constraints
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作者 杨安康 刘京南 +1 位作者 内田敬久 内田悦行 《Journal of Southeast University(English Edition)》 EI CAS 2008年第4期473-477,共5页
In order to improve the performance of estimating the fundamental matrix, a key problem arising in stereo vision, a novel method based on stripe constraints is presented. In contrast to traditional methods based on al... In order to improve the performance of estimating the fundamental matrix, a key problem arising in stereo vision, a novel method based on stripe constraints is presented. In contrast to traditional methods based on algebraic least-square algorithms, the proposed approach aims to minimize a cost function that is derived from the minimum radius of the Hough transform. In a structured-light system with a particular stripe code pattern, there are linear constraints that the points with the same code are on the same surface. Using the Hough transform, the pixels with the same code map to the Hough space, and the radius of the intersections can be defined as the evaluation function in the optimization progress. The global optimum solution of the fundamental matrix can be estimated using a Levenberg- Marquardt optimization iterative process based on the Hough transform radius. Results illustrate the validity of this algorithm, and prove that this method can obtain good performance with high efficiency. 展开更多
关键词 fundamental matrix structured-light stripe code pattern stereo vision
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新型力量训练器:帮你长力气
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作者 严庆铃 马国敏 《中国科技信息》 1998年第5期48-48,共1页
美国新近研制成功一种名为Pyramid Selex(金字塔)的渐进式举重操作系统——该系统用“加载重块”(以下简称“重块”)代替传统的杠铃片而成为一种可自由选择“重块”的新型系列力量练习器。这种练习器不仅改变了人们习惯的训练方法。
关键词 力量训练器 力量练习器 训练方法 重块 自由选择 新型系列 编码条 健身房 空间利用率 渐进式
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How can survival processing improve memory encoding? 被引量:1
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作者 LUO Meng GENG HaiYan 《Science China(Life Sciences)》 SCIE CAS 2013年第11期1028-1037,共10页
We investigated the psychological mechanism of survival processing advantage from the perspective of false memory in two experiments.Using a DRM paradigm in combination with analysis based on signal detection theory,w... We investigated the psychological mechanism of survival processing advantage from the perspective of false memory in two experiments.Using a DRM paradigm in combination with analysis based on signal detection theory,we were able to separately examine participants’utilization of verbatim representation and gist representation.Specifically,in Experiment 1,participants rated semantically related words in a survival scenario for a survival condition but rated pleasantness of words in the same DRM lists for a non-survival control condition.The results showed that participants demonstrated more gist processing in the survival condition than in the pleasantness condition;however,the degree of item-specific processing in the two encoding conditions did not significantly differ.In Experiment 2,the control task was changed to a category rating task,in which participants were asked to make category ratings of words in the category lists.We found that the survival condition involved more item-specific processing than did the category condition,but we found no significant difference between the two encoding conditions at the level of gist processing.Overall,our study demonstrates that survival processing can simultaneously promote gist and item-specific representations.When the control tasks only promoted either item-specific representation or gist representation,memory advantages of survival processing occurred. 展开更多
关键词 adaptive memory false memory survival processing advantage DRM paradigm signal detection theory
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Transcriptomics:Advances and approaches 被引量:17
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作者 DONG ZhiCheng CHEN Yan 《Science China(Life Sciences)》 SCIE CAS 2013年第10期960-967,共8页
Transcriptomics is one of the most developed fields in the post-genomic era.Transcriptome is the complete set of RNA transcripts in a specific cell type or tissue at a certain developmental stage and/or under a specif... Transcriptomics is one of the most developed fields in the post-genomic era.Transcriptome is the complete set of RNA transcripts in a specific cell type or tissue at a certain developmental stage and/or under a specific physiological condition,including messenger RNA,transfer RNA,ribosomal RNA,and other non-coding RNAs.Transcriptomics focuses on the gene expression at the RNA level and offers the genome-wide information of gene structure and gene function in order to reveal the molecular mechanisms involved in specific biological processes.With the development of next-generation high-throughput sequencing technology,transcriptome analysis has been progressively improving our understanding of RNA-based gene regulatory network.Here,we discuss the concept,history,and especially the recent advances in this inspiring field of study. 展开更多
关键词 TRANSCRIPTOMICS next-generation sequencing (NGS) non-coding RNA RNA-SEQ
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A Novel Quantum Covert Channel Protocol Based on Any Quantum Secure Direct Communication Scheme
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作者 徐淑奖 陈秀波 +1 位作者 钮心忻 杨义先 《Communications in Theoretical Physics》 SCIE CAS CSCD 2013年第5期547-553,共7页
By analyzing the basic properties of unitary transformations used in a quantum secure direct communication (QSDC) protocol, we show the main idea why a covert channel can be established within any QSDC channel which e... By analyzing the basic properties of unitary transformations used in a quantum secure direct communication (QSDC) protocol, we show the main idea why a covert channel can be established within any QSDC channel which employs unitary transformations to encode information. On the basis of the fact that the unitary transformations used in a QSDC protocol are secret and independent, a novel quantum covert channel protocol is proposed to transfer secret messages with unconditional security. The performance, including the imperceptibility, capacity and security of the proposed protocol are analyzed in detail. 展开更多
关键词 quantum information hiding quantum covert channel quantum cryptography quantum communication
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