检索结果-南通市图书馆

Test results judgment method based on bit faults

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2015年第6期28卷 1650-1657页

作者： Wang Gang Qiu Jing Liu Guanjun Lyu Kehong Science and Technology on Integrated Logistics Support Laboratory National University of Defense Technology College of Mechatronics and Automation National University of Defense Technology

Built-in-test （bit） is responsible for equipment fault detection, so the test data correct- ness directly influences diagnosis results. Equipment suffers all kinds of environment stresses, such as temperature, vibration, and electromagnetic stress. As embedded testing facility, bit also suffers from these stresses and the interferences/faults are caused, so that the test course is influenced, resulting in incredible results. Therefore it is necessary to monitor test data and judge test failures. Stress monitor and bit self-diagnosis would redound to bit reliability, but the existing anti- jamming researches are mainly safeguard design and signal process. This paper focuses on test results monitor and bit equipment （bitE） failure judge, and a series of improved approaches is proposed. Firstly the stress influences on components are illustrated and the effects on the diagnosis results are summarized. Secondly a composite bit program is proposed with information integra- tion, and a stress monitor program is given. Thirdly, based on the detailed analysis of system faults and forms of bit results, the test sequence control method is proposed. It assists bitE failure judge and reduces error probability. Finally the validation cases prove that these approaches enhance credibility.

关键词： bit Composite bit program Stress monitor Test course Test sequence control

QUANTIZATION AND TRAINING OF LOW bit-WIDTH CONVOLUTIONAL NEURAL NETWORKS FOR OBJECT DETECTION

在线全文

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2019年第3期37卷 349-359页

作者： Penghang Yin Shuai Zhang Yingyong Qi Jack Xin Department of Mathematics University of CaliforniaLos AngelesCA 90095USA Department of Mathematics University of CaliforniaIrvineCA 92697USA

We presen t LBW-Net,an efficient optimization based method for qua nt ization and training of the low bit-width convolutional neural networks(CNNs).Specifically,we quantize the weights to zero or powers of 2 by minimizing the Euclidean distance between full-precision weights and quantized weights during backpropagation(weight learning).We characterize the combinatorial nature of the low bit-width quantization *** 2-bit(ternary)CNNs,the quantization of N weights can be done by an exact formula in O(N log N)*** the bit-width is 3 and above,we further propose a semi-analytical thresholding scheme with a single free parameter for quantization that is computationally *** free parameter is further determined by network retraining and object detection *** LBW-Net has several desirable advantages over full-precision CNNs,including considerable memory savings,energy efficiency,and faster *** experiments on PASCAL VOC dataset show that compared with its 32-bit floating-point counterpart,the performance of the 6-bit LBW-Net is nearly lossless in the object detection tasks,and can even do better in real world visual scenes,while empirically enjoying more than 4× faster deployment.

关键词： Quantization Low bit width deep neural networks Exact and approximate analytical formulas Network training Object detection

PID-Based bit Allocation Strategy for Asymmetric Stereoscopic Video Coding with Fuzzy Quality Controller

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Transactions of Tianjin University 2013年第3期19卷 202-210页

作者：侯永宏高志敏王丕超侯春萍 School of Electronic Information Engineering Tianjin University

Asymmetric stereoscopic video coding can take advantage of binocular suppression in human vision by representing one of the two views in lower *** paper proposes a bit allocation strategy for asymmetric stereoscopic video *** order to improve the accuracy of bit allocation and rate control in the left view,a proportionalintegral-derivative controller is ***,to control the quality fluctuation between consecutive frames of the left view,a quality controller is ***,a fuzzy controller is proposed to control the variation in quality between the left and right views by comparing the PSNR disparity of two views with a fixed threshold,which is used to quantize the binocular psycho-visual redundancy and adjust the quantization parameter (QP) of the right view *** proposed algorithm has been implemented in H.264/AVC video codec,and the experimental results show its effectiveness in rate control while keeping a good quality for the left view,and fewer bits are allocated for the right view so that the overall bit rate is saved by 7.2% at most without the loss of subjective visual quality for stereoscopic video.

关键词： stereoscopic video bit allocation proportional-integral-derivative (PID) controller fuzzy controller asymmetric coding

“Push back” technique: A simple method to remove broken drill bit from the proximal femur

在线全文

学校读者我要写书评

暂无评论

World Journal of Orthopedics 2015年第10期6卷 847-849页

作者： Devendra K Chouhan Siddhartha Sharma Department of Orthopaedics Postgraduate Institute of Medical Education and Research

Broken drill bits can be difficult to remove from the proximal femur and may necessitate additional surgical exploration or special *** present a simple technique to remove a broken drill bit that does not require any special instrumentation and can be accomplished through the existing *** technique is useful for those cases where the length of the broken drill bit is greater than the diameter of the bone.

关键词： Broken drill bit Interlocking nail Femoral fracture Surgical technique

bit-层状双金属氢氧化物纳米杂化物的制备及防霉性能研究

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

无机材料学报 2013年第9期28卷 1025-1032页

作者：张译轩李松梅刘建华于美北京航空航天大学材料科学与工程学院空天材料与服役教育部重点实验室北京100191

采用共沉淀法将防霉剂1,2-苯丙异噻唑啉-3-酮(bit)成功插入到Mg-Al层状双金属氢氧化物层间(LDH),合成Mg2Al-bit LDHs纳米杂化物。采用X射线衍射、傅里叶红外光谱、扫描电子显微镜进行表征。并在pH=4.8和7.2的介质中研究药物缓释动力学... 详细信息

采用共沉淀法将防霉剂1,2-苯丙异噻唑啉-3-酮(bit)成功插入到Mg-Al层状双金属氢氧化物层间(LDH),合成Mg2Al-bit LDHs纳米杂化物。采用X射线衍射、傅里叶红外光谱、扫描电子显微镜进行表征。并在pH=4.8和7.2的介质中研究药物缓释动力学。结果显示bit成功地插入到了LDH的层间,载药量为44.35%,释放动力学过程符合准二级动力学方程。将胶囊型防霉剂添加到醇酸树脂涂层中进行霉菌试验。结果表明Mg2Al-bit LDHs在耐耗、溶出、析出方面优于bit,后期防霉效果更好。

关键词：层状双金属氢氧化物 bit 缓释防霉持久性

THE LUBRICATING MECHANISMS OF LUBRICATINGDRILLING FLUIDS ON SYNTHETIC DIAMOND bit

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 1996年第1期8卷 87-89页

作者： Long Wei(Department of Geology, Central South University of Technology,Changsha 410083, China) Department of Geology Central South University of Technology Changsha China

The functions of lubricants in diamond drilling were discussedin this paper. The influences of lubricant on drilling efficiency and bit′s life were compared and analyzed with simulated drilling test and lubrication... 详细信息

关键词： lubricating drilling fluids diamond bit drilling pressure〖WT5BZ

青藏高原东北部青海湖距今12ka以来的四醚指标bit记录：对古环境重建的启示

在线全文

学校读者我要写书评

暂无评论

中国科学：地球科学 2016年第5期46卷 156-166页

作者：王欢业董海良张传伦蒋宏忱刘卫国中国科学院地球环境研究所黄土与第四纪国家重点实验室西安710075 中国科学院大学地球科学学院北京100049 中国地质大学北京生物地质与环境地质国家重点实验室北京100083 同济大学海洋地质国家重点实验室上海200092 中国地质大学武汉生物地质与环境地质国家重点实验室武汉430074

早期的研究认为湖泊沉积物中的支链GDGTs(b GDGTs)主要来自陆地土壤细菌,而奇古菌醇由水生奇古菌产生,因此湖泊中表示b GDGTs与奇古菌醇比值的bit指标可用于衡量陆源有机质的输入程度.然而越来越多的研究表明,湖泊环境中普遍存在着自生... 详细信息

早期的研究认为湖泊沉积物中的支链GDGTs(b GDGTs)主要来自陆地土壤细菌,而奇古菌醇由水生奇古菌产生,因此湖泊中表示b GDGTs与奇古菌醇比值的bit指标可用于衡量陆源有机质的输入程度.然而越来越多的研究表明,湖泊环境中普遍存在着自生的b GDGTs,这样,湖泊沉积物中的bit指标可能不能用来指示陆源物质输入.尽管如此,最近对非洲Challa湖的研究表明bit仍可作为一个有效的古水文指标,但是在不同的湖泊中bit对古水文变化的响应可能有所不同.本文调查了距今12 ka以来青海湖沉积物中的bit及其相关GDGTs含量的变化.结合已发表的表层样品数据发现,青海湖沉积物中bit的变化主要反映了奇古菌醇含量的变化,而不是细菌b GDGTs含量的变化.在青海湖中,由于奇古菌醇含量与水深正相关,因此bit与水深负相关.这与Challa湖bit与湖面或降雨正相关的情况相反,表明不同湖泊中bit对水文变化的响应有所差异.因而在应用bit重建特定湖泊古水文变化时,需要先确定控制其沉积物bit值的主要因素.

关键词：青海湖 bit 湖水深度降雨量古水文

同方期刊数据库

在线全文

学校读者我要写书评

暂无评论

机载计算机bit虚警及解决策略研究

西北工业大学学报 2011年第3期29卷 400-404页

作者：田心宇张小林吴海涛姚英西北工业大学365所陕西西安710072 中国科学院西安授时中心陕西西安710600 西安邮电学院电信系陕西西安710121

机内测试(Built-in Test,bit)技术是改善系统或设备测试性和维修性的重要途径,通过在机载计算机中设计专门的bit电路,配合专门的bit软件,以达到大幅度提高机载计算机的可靠性和安全性的目的。但是较高的虚警率一直是阻碍bit技术在机载... 详细信息

机内测试(Built-in Test,bit)技术是改善系统或设备测试性和维修性的重要途径,通过在机载计算机中设计专门的bit电路,配合专门的bit软件,以达到大幅度提高机载计算机的可靠性和安全性的目的。但是较高的虚警率一直是阻碍bit技术在机载计算机中广泛应用的一个重要原因。文章在对机载计算机bit虚警机理模式进行分析的基础上,提出一种新型的机载计算机bit虚警问题的分析方法,并给出bit设计策略及关键技术解决方案。经过实例分析证明该策略明显降低了虚警率,提高了机载计算机的可靠性及可维护性。

关键词： bit 机载计算机可靠性可维护性

在线全文

学校读者我要写书评

暂无评论

基于最优未知输入观测器的bit降虚警技术

国防科技大学学报 2005年第6期27卷 97-100页

作者：姜云春邱静刘冠军钱彦岭国防科技大学机电工程与自动化学院湖南长沙410073

针对基于模型的机电控制系统bit中的虚警问题,分析了系统中的信息不确定性和产生虚警的机理,基于最优未知输入观测器方法设计了bit故障检测诊断系统,该系统对信息不确定性具有较强的鲁棒性,能够充分地抑制虚警。在某机电跟踪与稳定伺服... 详细信息

针对基于模型的机电控制系统bit中的虚警问题,分析了系统中的信息不确定性和产生虚警的机理,基于最优未知输入观测器方法设计了bit故障检测诊断系统,该系统对信息不确定性具有较强的鲁棒性,能够充分地抑制虚警。在某机电跟踪与稳定伺服平台bit系统上进行了试验研究,结果表明机理分析正确,所提方法有效。

关键词： bit 虚警最优未知输入观测器故障检测