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Comprehensive precursor anomaly research based on earthquake corresponding relevancy spectrum 被引量:5
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作者 Haitao Wang Qiong Wang Lanlan Tang 《Earthquake Science》 CSCD 2009年第6期675-681,共7页
With the aim to the quantification of anomaly identification and extraction for observed or analyzed records, we present two statistical methods of earthquake corresponding relevancy spectrum (ECRS) and sliding mean... With the aim to the quantification of anomaly identification and extraction for observed or analyzed records, we present two statistical methods of earthquake corresponding relevancy spectrum (ECRS) and sliding mean relevancy (SMR). With ECRS method, we can obtain the abnormal confidence attribute of data in different value ranges. Based on the relevancy spectrum in different studied time-intervals, we convert the original time sequence into relevancy time sequence, and can obtain the SMR time series by using the multi-point cumulative sliding mean method. Then we can identify the seismic precursor anomaly. We test this method by taking the time sequence of r/-value in the northern Tianshan region as original data. The result shows that when the studied time-interval is 18 months, the precursor anomaly can be identified bet- ter from sliding mean relevancy. The anomaly corresponding rate is 83 percent, the earthquake corresponding rate is 86 per- cent, and the anomaly is characteristic of the middle term. To try the research on multi-parameter comprehensive application, we take the Kalpin tectonic block in Xinjiang as our studied region, and analyze the spatial and temporal abnormal characters of multi-parameter sliding extreme-value relevancy (MSER) before mid-strong earthquakes in the Kalpin block. The result indicates that ECRS and SMR sequence in different time-intervals can not only be used to identify the precursor anomaly of single-item data, but also offer the data of quantitative single-item anomaly for comprehensive earthquake analysis and prediction. 展开更多
关键词 earthquake corresponding relevancy spectrum(ECRS) sliding mean relevancy (SMR) multi-parameter sliding extreme-value relevancy(MSER) comprehensive precursor anomaly
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Grey Relevancy Degree and Improved Eight-Direction Sobel Operator Edge Detection 被引量:2
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作者 Yang Yang Lianxin Wei 《Journal of Signal and Information Processing》 2021年第2期43-55,共13页
Edge detection is an important aspect to improve image edge quality in image processing. The purpose of edge detection is to identify the points in digital images with great brightness variation. However, the accuracy... Edge detection is an important aspect to improve image edge quality in image processing. The purpose of edge detection is to identify the points in digital images with great brightness variation. However, the accuracy of traditional edge detection methods in edge extraction is low. For the actual image, the grey edge is sometimes not very clear, the image also contains noise. The detection result of </span><span style="font-family:Verdana;">the </span><span style="font-family:Verdana;">traditional Sobel operator is relatively accurate, but the detection result is rough and sensitive to noise. To solve the above problems, this paper proposes an improved eight-direction Sobel operator based on grey relevancy degree, which combines 5</span><span style="font-family:""> </span><span style="font-family:Verdana;">×</span><span style="font-family:""> </span><span style="font-family:Verdana;">5 Sobel operator with </span><span style="font-family:Verdana;">a </span><span style="font-family:Verdana;">grey relational degree and a new eight-direction grey relevancy method. The results show that this method can detect the useful information of edge more accurately and improve the anti-noise performance. However, the drawback is that the algorithm is not automatic. 展开更多
关键词 Edge Detection Grey relevancy Eight Directions Sobel Operator
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Effective resource scheduling scheme considering scheduling relevancy for downlink joint transmission system 被引量:1
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作者 LI Xiao-na CUI Qi-mei +1 位作者 MU Yan-lin TAO Xiao-feng 《The Journal of China Universities of Posts and Telecommunications》 EI CSCD 2012年第5期16-25,共10页
Coordinated multi-point (CoMP) transmission is a promising technique to improve both cell average and cell edge throughput for long term evolution-advanced (LTE-A). For CoMP joint transmission (CoMP-JT) in heter... Coordinated multi-point (CoMP) transmission is a promising technique to improve both cell average and cell edge throughput for long term evolution-advanced (LTE-A). For CoMP joint transmission (CoMP-JT) in heterogeneous scenario, if joint transmission (JT) users are firstly scheduled, other non-JT users will not be allocated sufficient resources, i.e., scheduling relevancy exists in the users under different cells in the same coordination cluster. However, the CoMP system throughput will decline remarkably, if the impact of scheduling relevancy is not considered. To address this issue, this paper proposes a novel scheduling scheme for CoMP in heterogeneous scenario. The principles of the proposed scheme include two aspects. Firstly, this scheme gives priority to user fairness, based on an extended proportional fairness (PF) scheduling algorithm. Secondly, the throughput of the coordination cluster should be maintained at a high level. By taking the non-CoMP system as a baseline, the proposed scheme is evaluated by comparing to random PF (RPF) and orthogonal PF (OPF) scheme. System-level simulation results indicate that, the proposed scheme can achieve considerable performance gain in both cell average and cell edge throughput. 展开更多
关键词 COMP JT resource scheduling relevancy cell edge throughput
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High rate of clinically relevant improvement following anatomical total shoulder arthroplasty for glenohumeral osteoarthritis
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作者 Marc Randall Kristensen Nyring Bo Sanderhoff Olsen +1 位作者 Alexander Amundsen Jeppe Vejlgaard Rasmussen 《World Journal of Orthopedics》 2024年第2期156-162,共7页
BACKGROUND The minimal clinically important difference(MCID)is defined as the smallest meaningful change in a health domain that a patient would identify as important.Thus,an improvement that exceeds the MCID can be u... BACKGROUND The minimal clinically important difference(MCID)is defined as the smallest meaningful change in a health domain that a patient would identify as important.Thus,an improvement that exceeds the MCID can be used to define a successful treatment for the individual patient.AIM To quantify the rate of clinical improvement following anatomical total shoulder arthroplasty for glenohumeral osteoarthritis.METHODS Patients were treated with the Global Unite total shoulder platform arthroplasty between March 2017 and February 2019 at Herlev and Gentofte Hospital,Denmark.The patients were evaluated preoperatively and 3 months,6 months,12 months,and 24 months postoperatively using the Western Ontario Osteoarthritis of the Shoulder index(WOOS),Oxford Shoulder Score(OSS)and Constant-Murley Score(CMS).The rate of clinically relevant improvement was defined as the proportion of patients who had an improvement 24 months postoperatively that exceeded the MCID.Based on previous literature,MCID for WOOS,OSS,and CMS were defined as 12.3,4.3,and 12.8 respectively.RESULTS Forty-nine patients with a Global Unite total shoulder platform arthroplasty were included for the final analysis.Mean age at the time of surgery was 66 years(range 49.0-79.0,SD:8.3)and 65%were women.One patient was revised within the two years follow-up.The mean improvement from the preoperative assessment to the two-year follow-up was 46.1 points[95%confidence interval(95%CI):39.7-53.3,P<0.005]for WOOS,18.2 points(95%CI:15.5-21.0,P<0.005)for OSS and 37.8 points(95%CI:31.5-44.0,P<0.005)for CMS.Two years postoperatively,41 patients(87%)had an improvement in WOOS that exceeded the MCID,45 patients(94%)had an improvement in OSS that exceeded the MCID,and 42 patients(88%)had an improvement in CMS that exceeded the MCID.CONCLUSION Based on three shoulder-specific outcome measures we find that approximately 90%of patients has a clinically relevant improvement.This is a clear message when informing patients about their prognosis. 展开更多
关键词 Minimal clinically important difference Patient reported outcome measures Glenohumeral osteoarthritis Anatomical total shoulder arthroplasty Clinically relevant improvement
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Application Analysis of Nursing Students'Grades in Course Relevance Based on Association Rule Mining Algorithm Apriori
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作者 Xuemei Li Edward CJimenez 《Journal of Contemporary Educational Research》 2024年第2期213-223,共11页
By analyzing the correlation between courses in students’grades,we can provide a decision-making basis for the revision of courses and syllabi,rationally optimize courses,and further improve teaching effects.With the... By analyzing the correlation between courses in students’grades,we can provide a decision-making basis for the revision of courses and syllabi,rationally optimize courses,and further improve teaching effects.With the help of IBM SPSS Modeler data mining software,this paper uses Apriori algorithm for association rule mining to conduct an in-depth analysis of the grades of nursing students in Shandong College of Traditional Chinese Medicine,and to explore the correlation between professional basic courses and professional core courses.Lastly,according to the detailed analysis of the mining results,valuable curriculum information will be found from the actual teaching data. 展开更多
关键词 Grade analysis Apriori algorithm Course relevance Data mining
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Typos Correction in Overseas Chinese Learning Based on Chinese Character Semantic Knowledge Graph
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作者 Jing Xiong Xue Zhai +1 位作者 Zhan Zhang Feng Gao 《Journal of Data Analysis and Information Processing》 2023年第2期200-216,共17页
In recent years, more and more foreigners begin to learn Chinese characters, but they often make typos when using Chinese. The fundamental reason is that they mainly learn Chinese characters from the glyph and pronunc... In recent years, more and more foreigners begin to learn Chinese characters, but they often make typos when using Chinese. The fundamental reason is that they mainly learn Chinese characters from the glyph and pronunciation, but do not master the semantics of Chinese characters. If they can understand the meaning of Chinese characters and form knowledge groups of the characters with relevant meanings, it can effectively improve learning efficiency. We achieve this goal by building a Chinese character semantic knowledge graph (CCSKG). In the process of building the knowledge graph, the semantic computing capacity of HowNet was utilized, and 104,187 associated edges were finally established for 6752 Chinese characters. Thanks to the development of deep learning, OpenHowNet releases the core data of HowNet and provides useful APIs for calculating the similarity between two words based on sememes. Therefore our method combines the advantages of data-driven and knowledge-driven. The proposed method treats Chinese sentences as subgraphs of the CCSKG and uses graph algorithms to correct Chinese typos and achieve good results. The experimental results show that compared with keras-bert and pycorrector + ernie, our method reduces the false acceptance rate by 38.28% and improves the recall rate by 40.91% in the field of learning Chinese as a foreign language. The CCSKG can help to promote Chinese overseas communication and international education. 展开更多
关键词 Chinese Character Meaning Knowledge Graph Typos Correction OpenHowNet Semantic relevancy
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Relevant Visual Semantic Context-Aware Attention-Based Dialog
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作者 Eugene Tan Boon Hong Yung-Wey Chong +1 位作者 Tat-Chee Wan Kok-Lim Alvin Yau 《Computers, Materials & Continua》 SCIE EI 2023年第8期2337-2354,共18页
The existing dataset for visual dialog comprises multiple rounds of questions and a diverse range of image contents.However,it faces challenges in overcoming visual semantic limitations,particularly in obtaining suffi... The existing dataset for visual dialog comprises multiple rounds of questions and a diverse range of image contents.However,it faces challenges in overcoming visual semantic limitations,particularly in obtaining sufficient context from visual and textual aspects of images.This paper proposes a new visual dialog dataset called Diverse History-Dialog(DS-Dialog)to address the visual semantic limitations faced by the existing dataset.DS-Dialog groups relevant histories based on their respective Microsoft Common Objects in Context(MSCOCO)image categories and consolidates them for each image.Specifically,each MSCOCO image category consists of top relevant histories extracted based on their semantic relationships between the original image caption and historical context.These relevant histories are consolidated for each image,and DS-Dialog enhances the current dataset by adding new context-aware relevant history to provide more visual semantic context for each image.The new dataset is generated through several stages,including image semantic feature extraction,keyphrase extraction,relevant question extraction,and relevant history dialog generation.The DS-Dialog dataset contains about 2.6 million question-answer pairs,where 1.3 million pairs correspond to existing VisDial’s question-answer pairs,and the remaining 1.3 million pairs include a maximum of 5 image features for each VisDial image,with each image comprising 10-round relevant question-answer pairs.Moreover,a novel adaptive relevant history selection is proposed to resolve missing visual semantic information for each image.DS-Dialog is used to benchmark the performance of previous visual dialog models and achieves better performance than previous models.Specifically,the proposed DSDialog model achieves an 8% higher mean reciprocal rank(MRR),11% higher R@1%,6% higher R@5%,5% higher R@10%,and 8% higher normalized discounted cumulative gain(NDCG)compared to LF.DS-Dialog also achieves approximately 1 point improvement on R@k,mean,MRR,and NDCG compared to the original RVA,and 2 points improvement compared to LF andDualVD.These results demonstrates the importance of the relevant semantic historical context in enhancing the visual semantic relationship between textual and visual representations of the images and questions. 展开更多
关键词 Visual dialog CONTEXT-AWARE relevant history computer vision natural language processing
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Handily etching nickel foams into catalyst-substrate fusion self‐stabilized electrodes toward industrial‐level water electrolysis
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作者 Zexuan Zhu Xiaotian Yang +2 位作者 Jiao Liu Mingze Zhu Xiaoyong Xu 《Carbon Energy》 SCIE EI CAS CSCD 2023年第10期2-12,共11页
The key challenge of industrial water electrolysis is to design catalytic electrodes that can stabilize high current density with low power consumption(i.e.,overpotential),while industrial harsh conditions make the ba... The key challenge of industrial water electrolysis is to design catalytic electrodes that can stabilize high current density with low power consumption(i.e.,overpotential),while industrial harsh conditions make the balance between electrode activity and stability more difficult.Here,we develop an efficient and durable electrode for water oxidation reaction(WOR),which yields a high current density of 1000 mA cm−2 at an overpotential of only 284 mV in 1M KOH at 25°C and shows robust stability even in 6M KOH strong alkali with an elevated temperature up to 80°C.This electrode is fabricated from a cheap nickel foam(NF)substrate through a simple one-step solution etching method,resulting in the growth of ultrafine phosphorus doped nickel-iron(oxy)hydroxide[P-(Ni,Fe)O_(x)H_(y)]nanoparticles embedded into abundant micropores on the surface,featured as a self-stabilized catalyst–substrate fusion electrode.Such self-stabilizing effect fastens highly active P-(Ni,Fe)O_(x)H_(y)species on conductive NF substrates with significant contribution to catalyst fixation and charge transfer,realizing a win–win tactics for WOR activity and durability at high current densities in harsh environments.This work affords a cost-effective WOR electrode that can well work at large current densities,suggestive of the rational design of catalyst electrodes toward industrial-scale water electrolysis. 展开更多
关键词 alkaline water electrolysis industrially relevant conditions oxygen evolution reaction self‐stabilized electrodes
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Research on the optimization strategy of customers’electricity consumption based on big data
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作者 Jiangping Liu Zong Wang +3 位作者 Hui Hu Shaoxiang Xu Jiabin Wang Ying Liu 《Global Energy Interconnection》 EI CSCD 2023年第3期273-284,共12页
Current power systems face significant challenges in supporting large-scale access to new energy sources,and the potential of existing flexible resources needs to be fully explored from the power supply,grid,and custo... Current power systems face significant challenges in supporting large-scale access to new energy sources,and the potential of existing flexible resources needs to be fully explored from the power supply,grid,and customer perspectives.This paper proposes a multi-objective electricity consumption optimization strategy considering the correlation between equipment and electricity consumption.It constructs a multi-objective electricity consumption optimization model that considers the correlation between equipment and electricity consumption to maximize economy and comfort.The results show that the proposed method can accurately assess the potential for electricity consumption optimization and obtain an optimal multi-objective electricity consumption strategy based on customers’actual electricity consumption demand. 展开更多
关键词 Big data Electricity consumption optimization Load elasticity Electricity consumption relevance
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Precise Multi-Class Classification of Brain Tumor via Optimization Based Relevance Vector Machine
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作者 S.Keerthi P.Santhi 《Intelligent Automation & Soft Computing》 SCIE 2023年第4期1173-1188,共16页
The objective of this research is to examine the use of feature selection and classification methods for distinguishing different types of brain tumors.The brain tumor is characterized by an anomalous proliferation of ... The objective of this research is to examine the use of feature selection and classification methods for distinguishing different types of brain tumors.The brain tumor is characterized by an anomalous proliferation of brain cells that can either be benign or malignant.Most tumors are misdiagnosed due to the variabil-ity and complexity of lesions,which reduces the survival rate in patients.Diagno-sis of brain tumors via computer vision algorithms is a challenging task.Segmentation and classification of brain tumors are currently one of the most essential surgical and pharmaceutical procedures.Traditional brain tumor identi-fication techniques require manual segmentation or handcrafted feature extraction that is error-prone and time-consuming.Hence the proposed research work is mainly focused on medical image processing,which takes Magnetic Resonance Imaging(MRI)images as input and performs preprocessing,segmentation,fea-ture extraction,feature selection,similarity measurement,and classification steps for identifying brain tumors.Initially,the medianfilter is practically applied to the input image to reduce the noise.The graph-cut segmentation technique is used to segment the tumor region.The texture feature is extracted from the output of the segmented image.The extracted feature is selected by using the Ant Colony Opti-mization(ACO)algorithm to improve the performance of the classifier.This prob-abilistic approach is used to solve computing issues.The Euclidean distance is used to calculate the degree of similarity for each extracted feature.The selected feature value is given to the Relevance Vector Machine(RVM)which is a multi-class classification technique.Finally,the tumor is classified as abnormal or nor-mal.The experimental result reveals that the proposed RVM technique gives a better accuracy range of 98.87%when compared to the traditional Support Vector Machine(SVM)technique. 展开更多
关键词 Brain tumor SEGMENTATION classification relevance vector machine(RVM) ant colony optimization(ACO)
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Sustainability Evaluation of Mangrove Forest Management System of Tagbanua Tribe in Bgy. Manalo, Puerto Princesa City, Palawan, Philippines
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作者 Mark Joseph J.Buncag Jaybie S.Arzaga +8 位作者 Liezl F.Tangonan Jeffrey H.de Castro Mary Claire M.Villanueva Lilia Margallo Imelda R.Lactuan Sheryl G.Docto Angelo V.Garcia Princes Eunice C.Denosta Sweet Angelikate L.Villaruel 《Journal of Environmental & Earth Sciences》 2023年第2期36-49,共14页
Community-based forest management agreement in the country is a needed instrument in attaining sustainability of mangrove management.Sadly,there is no assurance that the system implemented in the mangrove forest manag... Community-based forest management agreement in the country is a needed instrument in attaining sustainability of mangrove management.Sadly,there is no assurance that the system implemented in the mangrove forest management is sustainable.So,evaluating the mangrove management sustainability of the local tribe is a viable avenue for the appropriate management.In this study,the sustainability of the mangrove management system of the Tagbanua tribe in Bgy.Manalo,Puerto Princesa City,Palawan was evaluated.The study utilized various criteria with relevant indicators of sustainable mangrove forest management in assessing the mangrove forest management system.Focused group discussions were conducted to identify the relevant sustainable mangrove forest management C&I and verifiers.Each indicator was rated using the formulated verifiers in the form of the rating scale.Through household interviews,FGD,KII,mangrove assessment,and secondary data analysis,this study also used a mathematical model on the Sustainability Index for Individual Criteria(SIIC)to evaluate the scores for individual criteria and the Overall Sustainability Index(OSI)of the community.As a result,there are a total of seven relevant criteria,and 35 relevant indicators for Mangrove Management in Barangay Manalo.Based on the individual rating of seven criteria,the overall rating of the sustainable mangrove management system is 1.80,which implies a fairly sustainable mangrove management system.Also,the computed overall sustainability index is 0.26,which is fairly or moderately sustainable.Each criterion has strengths and weaknesses and needs to be improved to have a highly sustainable mangrove management system. 展开更多
关键词 Mangrove management system Relevant criteria and indicators Mangrove sustainability index
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On Topics in Quantum Games
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作者 Yshai Avishai 《Journal of Quantum Information Science》 2023年第3期79-130,共52页
This work concentrates on simultaneous move non-cooperating quantum games. Part of it is evidently not new, but it is included for the sake self consistence, as it is devoted to introduction of the mathematical and ph... This work concentrates on simultaneous move non-cooperating quantum games. Part of it is evidently not new, but it is included for the sake self consistence, as it is devoted to introduction of the mathematical and physical grounds of the pertinent topics, and the way in which a simple classical game is modified to become a quantum game (a procedure referred to as a quantization of a classical game). The connection between game theory and information science is briefly stressed, and the role of quantum entanglement (that plays a central role in the theory of quantum games), is exposed. Armed with these tools, we investigate some basic concepts like the existence (or absence) of a pure strategy and mixed strategy Nash equilibrium and its relation with the degree of entanglement. The main results of this work are as follows: 1) Construction of a numerical algorithm based on the method of best response functions, designed to search for pure strategy Nash equilibrium in quantum games. The formalism is based on the discretization of a continuous variable into a mesh of points, and can be applied to quantum games that are built upon two-players two-strategies classical games, based on the method of best response functions. 2) Application of this algorithm to study the question of how the existence of pure strategy Nash equilibrium is related to the degree of entanglement (specified by a continuous parameter γ ). It is shown that when the classical game G<sub>C</sub> has a pure strategy Nash equilibrium that is not Pareto efficient, then the quantum game G<sub>Q</sub> with maximal entanglement (γ = π/2) has no pure strategy Nash equilibrium. By studying a non-symmetric prisoner dilemma game, it is found that there is a critical value 0γ<sub>c</sub> such that for γγ<sub>c</sub> there is a pure strategy Nash equilibrium and for γ≥γ<sub>c </sub>there is no pure strategy Nash equilibrium. The behavior of the two payoffs as function of γ starts at that of the classical ones at (D, D) and approaches the cooperative classical ones at (C, C) (C = confess, D = don’t confess). 3) We then study Bayesian quantum games and show that under certain conditions, there is a pure strategy Nash equilibrium in such games even when entanglement is maximal. 4) We define the basic ingredients of a quantum game based on a two-player three strategies classical game. This requires the introduction of trits (instead of bits) and quantum trits (instead of quantum bits). It is proved that in this quantum game, there is no classical commensurability in the sense that the classical strategies are not obtained as a special case of the quantum strategies. 展开更多
关键词 Two-Players Two Strategies Quantum Game and SU(2) Strategies Relevance of Entanglement and Bell States Nash Equilibrium and Its Relation to Entanglement in Pure and Mixed Strategy Quantum Games Nash Equilibrium and Partial Entanglement Nash Equilibrium Despite Maximal Entanglement Two Players Three Strategies Quantum Games: Qutrits and SU(3) Strategies
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基于中红外光谱分析技术的香菇产地识别研究 被引量:11
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作者 朱哲燕 张初 +2 位作者 刘飞 孔汶汶 何勇 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 2014年第3期664-667,共4页
采用中红外光谱分析技术对香菇产地进行识别研究,并将相关向量机(relevance vector machine , RVM )算法应用于中红外光谱判别分析之中,取得了较好的效果。通过采集香菇粉末的中红外透射光谱,去除光谱噪声明显部分,对剩下的3581... 采用中红外光谱分析技术对香菇产地进行识别研究,并将相关向量机(relevance vector machine , RVM )算法应用于中红外光谱判别分析之中,取得了较好的效果。通过采集香菇粉末的中红外透射光谱,去除光谱噪声明显部分,对剩下的3581~689 cm-1透射谱线采用多元散射校正(multiplicative scatter correc-tion ,MSC)进行预处理,并基于预处理谱线建立了香菇产地识别的偏最小二乘判别分析(partial least squares-discriminant analysis ,PLS-DA)、簇类独立软模式分类(soft independent modeling of class analogy , SIMCA)、K 最邻近算法(K-nearest neighbor algorithm , KNN )、支持向量机(support vector machine , SVM )、RVM模型等五种判别分析模型。所有模型的识别正确率均高于80%,KNN ,SVM 和RVM 判别分析模型取得了相近的结果,建模集和预测集识别正确率高于90%。基于全谱的PLS-DA模型的加权回归系数,利用加权回归系数法选取了6个特征波数,并基于特征波数建立了PLS-DA ,KNN ,SVM 和RVM 模型。基于特征波数的PLS-DA模型的建模集和预测集识别正确率均低于80%,而KNN ,SVM和RVM模型的建模集和预测集的识别效果相近,且都高于90%。基于全谱和特征波数的模型中,RV M 算法表现出较好的效果,识别正确率优于90%。结果表明,基于中红外光谱技术能用于香菇产地的识别,特征波数的选择以及RVM算法可以有效的用于中红外光谱判别分析中。本文成功将中红外光谱用于香菇产地识别研究,为香菇品质以及其他农产品品质分析提供了一种新的想法,具有实际意义。 展开更多
关键词 中红外光谱 香菇产地 相关向量机 RELEVANCE VECTOR machine (RVM )
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一种基于QPSO-RVM的模拟电路故障预测方法 被引量:25
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作者 张朝龙 何怡刚 +2 位作者 邓芳明 袁莉芬 何威 《仪器仪表学报》 EI CAS CSCD 北大核心 2014年第8期1751-1757,共7页
提出了一种可应用于模拟电路故障预测的方法。通过提取被测电路的频域响应信号,计算皮尔逊相关系数,从而表征电路元件的健康度;在获取元件在不同时间点的健康度数据的基础上,推导出电路元件发生故障时的健康度阈值;将经量子粒子群算法... 提出了一种可应用于模拟电路故障预测的方法。通过提取被测电路的频域响应信号,计算皮尔逊相关系数,从而表征电路元件的健康度;在获取元件在不同时间点的健康度数据的基础上,推导出电路元件发生故障时的健康度阈值;将经量子粒子群算法优化的相关向量机算法用于故障预测,预测各个时间点的元件健康度变化轨迹并估计模拟电路的剩余有用寿命。该预测方法计算简单、通用性强,适用于实时预测。故障预测仿真实验与实例实验证明了方法的有效性与先进性。 展开更多
关键词 模拟电路 剩余有用寿命 健康度 皮尔逊相关系数 相关向量机 量子粒子群 Pearson product-moment correlation coefficient(PPMCC) relevance vector machine(RVM) quantum-behaved particle SWARM optimization(QPSO)
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基于综合健康指数与RVM的系统级失效预测 被引量:6
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作者 陈雄姿 于劲松 +1 位作者 陆文高 李行善 《系统工程与电子技术》 EI CSCD 北大核心 2015年第10期2298-2305,共8页
针对具有多维状态变量、多种工作模式和故障模式的复杂工程系统,提出一种基于综合健康指数(synthesized health index,SHI)与相关向量机(relevance vector machine,RVM)的系统级失效预测方法。在离线训练阶段,先根据有限失效历史数据建... 针对具有多维状态变量、多种工作模式和故障模式的复杂工程系统,提出一种基于综合健康指数(synthesized health index,SHI)与相关向量机(relevance vector machine,RVM)的系统级失效预测方法。在离线训练阶段,先根据有限失效历史数据建立各工作模式下的健康评估模型,并据此获得各历史退化轨迹的SHI序列;然后再使用RVM对这些序列进行回归处理,进而辨识出与回归曲线最为匹配的函数模型。在线预测阶段,先运用健康评估模型计算当前设备的SHI序列并进行RVM回归,再拟合出离线阶段确定的函数模型并添加时变噪声;最后,外推预测出系统剩余使用寿命的概率密度分布。该方法成功应用到涡轮发动机的失效预测案例。 展开更多
关键词 失效预测 综合健康指数 相关向量机 不确定性管理 SYNTHESIZED health index (SHI) RELEVANCE vector machine (RVM)
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Query Expansion Based on Semantics and Statistics in Chinese Question Answering System 被引量:2
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作者 JIA Keliang PANG Xiuling +1 位作者 LI Zhinuo FAN Xiaozhong 《Wuhan University Journal of Natural Sciences》 CAS 2008年第4期505-508,共4页
In Chinese question answering system, because there is more semantic relation in questions than that in query words, the precision can be improved by expanding query while using natural language questions to retrieve ... In Chinese question answering system, because there is more semantic relation in questions than that in query words, the precision can be improved by expanding query while using natural language questions to retrieve documents. This paper proposes a new approach to query expansion based on semantics and statistics Firstly automatic relevance feedback method is used to generate a candidate expansion word set. Then the expanded query words are selected from the set based on the semantic similarity and seman- tic relevancy between the candidate words and the original words. Experiments show the new approach is effective for Web retrieval and out-performs the conventional expansion approaches. 展开更多
关键词 Chinese question answering system query expansion relevance feedback semantic similarity semantic relevancy
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德里达翻译思想:回归、转变还是其他? 被引量:2
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作者 张霄军 《外语研究》 CSSCI 北大核心 2010年第2期77-81,共5页
雅克·德里达将解构思想应用于翻译研究,形成了解构的翻译理论。解构翻译理论主要体现在德里达的一篇演讲稿"Quest-ce que-unetraduction ‘relevante’?"中,文中提出了一种"Relevant翻译"理论。本文回顾了德... 雅克·德里达将解构思想应用于翻译研究,形成了解构的翻译理论。解构翻译理论主要体现在德里达的一篇演讲稿"Quest-ce que-unetraduction ‘relevante’?"中,文中提出了一种"Relevant翻译"理论。本文回顾了德里达的解构翻译思想,重点剖析了"Relevant翻译"理论,并针对国内翻译界对德里达这一思想的两种解读,尤其是其中的一种误解,提出不同看法,说明德里达的"Relevant翻译"理论及其解构翻译思想与哲学史上其他一些思想之间的关系不是"回归"而是传承,这一理论也更不是德里达本人解构思想的一种"转变",而只是其解构思想在翻译理论中的深入和延续。 展开更多
关键词 德里达 “Relevant翻译”理论 回归 转变 延续 解构
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Analysis on Industry Structure Adjustment and Energy Consumption Based on Grey Theory——A Case Study of Qinghai Province
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作者 ZHANG Yin-ling,WANG Dan-tong,ZHOU Wei School of Land Science and Technology,China University of Geosciences,Beijing 100083,China 《Asian Agricultural Research》 2011年第2期73-75,共3页
In view of the complexity and non-linearity of energy consumption system and the status quo of the development of energy in Qinghai Province,the relations between energy consumption and industrial structure is analyze... In view of the complexity and non-linearity of energy consumption system and the status quo of the development of energy in Qinghai Province,the relations between energy consumption and industrial structure is analyzed by using the quantitative analysis of grey relation degree by using the grey system theory.The relevancy degree among the primary industry,the secondary industry and the tertiary industry and living energy consumption are obtained,and then the trend of energy consumption in the following several years can be predicted.The results show that the secondary industry has the largest relevancy degree to the total energy consumption.In the end,according to the results of the research,several suggestions on how to saving energy are put forward.Firstly,the government should improve the high-tech industry and restrict the development of high-consumption and high-pollution industries.Secondly,the government should promote the low-carbon way of life;promote energy saving and control the energy consumption of the department of life.Thirdly,clean production should be actively promoted in the tertiary industry and the circular economy should be vigorously expanded. 展开更多
关键词 GREY relevancy ANALYSIS GREY CORRELATION DEGREE In
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To Split or to Unify?-A Comparative Study on Functional Equivalence Translation Theory and Relevance Translation Theory
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作者 刘静 孔燕 《海外英语》 2012年第22期157-158,共2页
Functional equivalence,a focus in the translation studies,has been bombarded with numerous criticisms.Meanwhile,relevance translation theory,proposed by Ernst-August Gutt,offers a united theoretical framework for tran... Functional equivalence,a focus in the translation studies,has been bombarded with numerous criticisms.Meanwhile,relevance translation theory,proposed by Ernst-August Gutt,offers a united theoretical framework for translation studies.The development of the translation theories does not rely on the appearance of a brand-new theory,but on the successful connection among various theories.To split or to unify,it is a question and it will direct the further development of translation studies.Analyzing the similarities and differences between these two theories,the author are striving for a unity of them and striking a better way to approach translation studies. 展开更多
关键词 FUNCTIONAL EQUIVALENCE RELEVANCE theory UNIFY
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Pragmatics and Its Significant Implications on EFL Teaching
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作者 任莉平 原源 《海外英语》 2016年第10期221-222,共2页
Based on pragmatics theories, this article will discuss its application and put forward the implications of pragmatics on EFL teaching.
关键词 PRAGMATICS context PRESUPPOSITION POOL RELEVANCE theory EFL teaching
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