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Linearity optimization of edge filter demodulators in FBG_s 被引量:2
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作者 LI Dong-sheng SUI Qing-mei CAO Yu-qiang 《Optoelectronics Letters》 EI 2008年第3期193-195,共3页
A kind of electric circuit is improved to optimize the linearity of edge filter demodulators in FBG .By using a logarithm amplifier and an extraction operation, the linear range of optimized edge filter demodulators h... A kind of electric circuit is improved to optimize the linearity of edge filter demodulators in FBG .By using a logarithm amplifier and an extraction operation, the linear range of optimized edge filter demodulators has been broadened effectively, and the requirement of optical filter's linear range has been reduced. Theoretical analyses and the simulation results indi-cated that the linear range of optimized edge fdter demodulator's covers the whole transition region of the edge filter, while a strict linearity of the optical filter is not necessary. 展开更多
关键词 光纤 解调器 线性分析 分析方法
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Mediators of Parental Status (Single or Both Parenting) and Academic Performance of Primary School Pupils in Ghana 被引量:1
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作者 Theresa Antwi 《Sociology Study》 2014年第1期1-17,共17页
This multivariate study investigated whether Parental Support, Teacher Support, and Academic Motivation mediate the relationship between Parental Status (i.e., children from single or both parents homes) and Academi... This multivariate study investigated whether Parental Support, Teacher Support, and Academic Motivation mediate the relationship between Parental Status (i.e., children from single or both parents homes) and Academic Performance, The research design used for the study was a cross sectional survey using the quantitative approach. Data set from 250 primary school pupils from the Effutu Municipality were analysed using partial correlation and multiple regression analytical techniques. Among the study findings, that were when the effects of Parental Status were controlled for, Parental Support, Teacher Support, and Academic Motivation still related significantly to Academic Performance. Among the conclusions of the findings are that, whether the child was from a single or both parent home was not important with regard to his or her academic performance but rather it was the quality of support that the child gets from whoever is doing the parenting, teacher support and the child's own academic motivation that were important to determine the child's Academic Performance. The study also found that Parental Support was the best predictor of the pupils' Academic Performance out of the three factors includingTeacher Support and Academic Motivation. 展开更多
关键词 MEDIATORS parental status teacher support academic motivation academic performance
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What is "Chinese Modem Calligraphy"? An Exploration of the Critical Debate on Modem Calligraphy in Contemporary China
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作者 Adriana lezzi 《Journal of Literature and Art Studies》 2015年第3期206-216,共11页
Since the mid-1980s Chinese calligraphy art has undergone a radical change and has opened itself to experimentation. Nowadays in China this artistic revolution has sparked a vivid debate among the art critics on three... Since the mid-1980s Chinese calligraphy art has undergone a radical change and has opened itself to experimentation. Nowadays in China this artistic revolution has sparked a vivid debate among the art critics on three main topics: (1) definition of the phenomenon; (2) analysis of its nature; and (3) classification of the artistic production. In this article, all these aspects are analysed in order to give a comprehensive view of the present theoretical discussion and of its future development. 展开更多
关键词 Chinese Modem Calligraphy (CMC) contemporary China art critic critical debate modernity contemporary art modem art
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Diatom distribution in surface sediments from Chinese inshore waters and the relationship to modern environmental variables
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作者 陈淳 赵广涛 +2 位作者 陈敏 蓝东兆 兰彬斌 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2014年第4期828-844,共17页
Diatoms are widely used to study past and present changes in the marine environment. Unimodal models are appropriate for exploring the relationship between environmental properties in Chinese inshore waters and fossil... Diatoms are widely used to study past and present changes in the marine environment. Unimodal models are appropriate for exploring the relationship between environmental properties in Chinese inshore waters and fossil diatom species derived from modem surface sediments. The best-fit relationships between two multivariate datasets (diatom species and environmental variables) were identified using canonical correspondence analysis (CCA), which is a constrained ordination technique. The absolute abundance of diatoms in the Chinese inshore waters ranged from 500 to 48 000 valves/g, and the average absolute abundance of all the 29 sites was l l 300 valves/g. 153 species and varieties of diatoms belonging to 42 genera in all were identified in the Chinese inshore waters. There were 28 dominant diatom species in all. According to the absolute abundance of the dominant species and the spatial distribution of the currents from the Chinese inshore waters, 12 diatom assemblages were distinguished from north to south, which reflected the different oceanographic conditions at the regional scale. Of the eight environmental variables considered, the most important environmental variable is winter sea surface salinity (WSS), which was also the only environmental variable with statistical significance. Therefore, it may be used to establish a transfer functions for the Chinese inshore waters in future paleoclimate studies. 展开更多
关键词 inshore waters diatom assemblages environmental variables canonical correspondence analysis (CCA)
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A Preliminary Evaluation of Global and East Asian Cloud Radiative Effects in Reanalyses 被引量:1
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作者 LI Jian-Dong MAO Jiang-Yu 《Atmospheric and Oceanic Science Letters》 CSCD 2015年第2期100-106,共7页
Cloud radiative effects (CREs) at the top of the atmosphere (TOA) in three reanalysis datasets (the Eur- opean Center for Medium-Range Weather Forecasts In- terim Reanalysis (ERA-Interim), the Japanese 55-yr Re... Cloud radiative effects (CREs) at the top of the atmosphere (TOA) in three reanalysis datasets (the Eur- opean Center for Medium-Range Weather Forecasts In- terim Reanalysis (ERA-Interim), the Japanese 55-yr Re- analysis Project (JRA-55), and the Modem-Era Retro- spective Analysis for Research and Applications (MERRA)) are evaluated using recent satellite-based observations. The reanalyses can basically capture the spatial pattern of the annual mean shortwave CRE, but the global mean longwave CRE in ERA-interim and JRA55 is weaker than observed, leading to overestimations of the net CRE. Moreover, distinct CRE biases of the reanalyses occur in the Intertropical Convergence Zone (ITCZ), coastal Pa- cific and Atlantic regions, and East Asia. Quantitative examination further indicates that the spatial correlations of CREs and TOA upward radiation fluxes with corre- sponding observations in ERA-Interim are better than in the other two reanalyses. Although MERRA has certain abilities in producing the magnitudes of global mean CREs, its performance in terms of spatial correlations in winter and summer are worse than for the other two re- analyses. The ability of JRA55 in reflecting CREs lies between the other two datasets. Compared to the global mean results, the spatial correlations of shortwave CRE in East Asia decrease and the biases of regional mean CREs increase in the three reanalyses. This implies that, cur- rently, it is still difficult to reproduce East Asian CREs based on these reanalyses. Relatively, ERA-Interim de- scribes the seasonal variation of East Asian CREs well, albeit weaker than observed. The present study also sug- gests that in-depth exploration of the ability of reanalysis data to describe aspects relating to cloud properties and rad- iation is needed usin~ more comprehensive observations. 展开更多
关键词 cloud radiative effect East Asia reanalysisdata EVALUATION
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Nuclear Properties of Carbon Nanotubes for Fast Neutron Detection
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作者 Jorge Antonio Garcia Gallardo +2 位作者 Sebastián Beneitez Pupo Mauricio Petaccia Juana Gervasoni 《Journal of Energy and Power Engineering》 2018年第4期192-196,共5页
Fast neutron detection is a subject of great relevance in modem nuclear science and engineering, in particular, with the recent advances in nuclear fusion research, detection of fast neutron became a key issue. Nuclea... Fast neutron detection is a subject of great relevance in modem nuclear science and engineering, in particular, with the recent advances in nuclear fusion research, detection of fast neutron became a key issue. Nuclear properties of carbon are of special interest due to its relatively high capture cross section for fast neutrons. Devices made of silicon carbide and diamond are based on these properties, and so are being developed to be used with the proper wiring. In addition, in recent years carbon nano-tubes unveiled their electrical and mechamical properties, which can be exploited for neutron detection. In this work, we use MCNP5 Monte Carlo code to analyze the carbon nuclear properties and discuss the way nano-tubes can be used for fast neutron detection. 展开更多
关键词 Fast neutron nuclear fusion carbon nano-tube nano-device.
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The Guidance and Meaning directed by the Three Phases of Memory on the Reading of Literature Works Written by the Style of Stream of Consciousness ——taking the Work Hear the Wind Sing by Haruki Murakami as an Example
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作者 Li Ying 《International English Education Research》 2014年第11期28-31,共4页
Recently, the researchers put their attention on the literature works on Virginia Woolf or James Joyce too heavily just because the skill of stream of consciousness is used through the novel completely. Choosing this ... Recently, the researchers put their attention on the literature works on Virginia Woolf or James Joyce too heavily just because the skill of stream of consciousness is used through the novel completely. Choosing this novel by Japanese writer as an example is an experiment, because the stream of consciousness as a composing method has melted its impression into the modem novel. And in the researcher's opinion, regardless the traditional part, the researching focus should be shifted on the works written by nowadays writer. To begin this paper, there are four questions should be solved: First, the definition of stream of consciousness should be known clearly; another question is the structure analysis of structure of Hear the Wind Sing; secondly, compared with the mental space theory and blending theory by Fauconnier, how to judge the function of Three Phases of memory's direction on reading should be focused on; thirdly, the reason why readers meet the problem of barrier when they read the stream of consciousness novel, and how the memory helps to solve the problem should be study in this section. Fourth, the extra factors which support the function of memory will enhance the skill of reading the SOC novel and finally foreground the meaning. 展开更多
关键词 stream of consciousness Novel the lhree Phases of memory mental space theory blending theory (Juidance andMeaning
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Implicit Variational Inclusions and Algorithms Involving (A, η)-monotone Operators in 2-uniformly Smooth Banach Spaces
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作者 N. K. Sahu 《Journal of Mathematics and System Science》 2015年第6期269-278,共10页
This paper deals with a new class of nonlinear set valued implicit variational inclusion problems involving (A, η)-monotone mappings in 2-uniformly smooth Banach spaces. Semi-inner product structure has been used t... This paper deals with a new class of nonlinear set valued implicit variational inclusion problems involving (A, η)-monotone mappings in 2-uniformly smooth Banach spaces. Semi-inner product structure has been used to study the (A, η)-monotonicity. Using the generalized resolvent operator technique and the semi-inner product structure, the approximation solvability of the proposed problem is investigated. An iterative algorithm is constructed to approximate the solution of the problem. Convergence analysis of the proposed algorithm is investigated. Similar results are also investigated for variational inclusion problems involving (H, η)-monotone mappings. 展开更多
关键词 Semi-inner product space Generalized resolvent operator Variational inclusion 2-uniformly smooth Banach space.
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一起维修质量纠纷引发的启示
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作者 路林林 齐胜 《汽车维护与修理》 2000年第7期45-45,共1页
最近我们协助市工商局“3·15”行政执法大队成功地调解了一起由汽车配件引发的维修质量纠纷。1 纠纷情况个体车主陈某在某汽车配件商店购买了自称是6110A发动机大修的四配套组件到个体修理业户用某处对其解放大货车进行发动机大修... 最近我们协助市工商局“3·15”行政执法大队成功地调解了一起由汽车配件引发的维修质量纠纷。1 纠纷情况个体车主陈某在某汽车配件商店购买了自称是6110A发动机大修的四配套组件到个体修理业户用某处对其解放大货车进行发动机大修。修理过后,发现该车发动机油耗大幅度增加,排气管冒黑烟,汽车的动力性明显不足。于是他又找到承修方,承修方经过检查告知陈是喷油泵问题。可是,在反复5次校泵后发动机仍不能正常工作。 展开更多
关键词 汽车维修 维修质量纠纷 调解分析 行业管理
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Analysis of the Tunable Asymmetric Fiber F-P Cavity for Fiber Strain Sensor Edge-Filter Demodulation 被引量:4
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作者 Haotao CHEN Youcheng LIANG 《Photonic Sensors》 SCIE EI CAS 2014年第4期338-343,共6页
An asymmetric fiber (Fabry-Perot, F-P) interferometric cavity with the good linearity and wide dynamic range was successfully designed based on the optical thin film characteristic matrix theory; by adjusting the ma... An asymmetric fiber (Fabry-Perot, F-P) interferometric cavity with the good linearity and wide dynamic range was successfully designed based on the optical thin film characteristic matrix theory; by adjusting the material of two different thin metallic layers, the asymmetric fiber F-P interferometric cavity was fabricated by depositing the multi-layer thin films on the optical fiber's end face. The asymmetric F-P cavity has the extensive potential application. In this paper, the demodulation method for the wavelength shift of the fiber Bragg grating (FBG) sensor based on the F-P cavity is demonstrated, and a theoretical formula is obtained. And the experimental results coincide well with the computational results obtained from the theoretical model. 展开更多
关键词 Fiber sensor DEMODULATION ASYMMETRIC F-P cavity edge-filter
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The Change-Over of Yin-yang and Gene Regulation in Kidney Deficiency Syndromes 被引量:1
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作者 董飞侠 何立群 《Journal of Traditional Chinese Medicine》 SCIE CAS CSCD 2009年第3期237-239,共3页
The present paper studies gene regulation in kidney deficiency syndromes from the simple Nephrotic Syndrome and with the principle of positive-negative regulation to control the change-over ofyin-yang, the modem molec... The present paper studies gene regulation in kidney deficiency syndromes from the simple Nephrotic Syndrome and with the principle of positive-negative regulation to control the change-over ofyin-yang, the modem molecular biological techniques can be used, such as gene chip, representational difference analysis (RDA) and gene sequence analysis, so as to investigate the inner relationship between the genes and kidney deficiency syndromes and prove the effect given by these genes on the pathophysiological status of change-over ofyin-yang in kidney deficiency syndromes. This philosophical approach and method can also be adopted for studies of the related genes in other TCM syndromes. 展开更多
关键词 nephritic syndrome kidney-deficiency syndrome change-over ofyin and yang gene regulation
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The twoscale asymptotic error analysis for piezoelectric problems in the quasi-periodic structure 被引量:1
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作者 FENG YongPing DENG MingXiang GUAN XiaoFei 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2013年第10期1844-1853,共10页
Applications for piezoelectric effect have grown rapidly, and piezoelectric materials play important roles in countless areas of modem life. By means of twoscale method and coupled boundary layer, some new kinds of tw... Applications for piezoelectric effect have grown rapidly, and piezoelectric materials play important roles in countless areas of modem life. By means of twoscale method and coupled boundary layer, some new kinds of twoscale asymptotic expansions for solutions to the electrical potential and the displacement in quasi-periodic structure under coupled piezoelectric effect are derived, and the homogenization constants of piezoelectric materials are presented. The coupled twoscale relation between the electrical potential and the displacement is set up, and some improved asymptotic error estimates are analyzed. 展开更多
关键词 twoscale method PIEZOELECTRICITY quasi-periodic structure homogenization constants
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