4,488 research outputs found

    Building detection from aerial imagery using inception ResNet UNet and UNet architectures

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    Buildings are one of the key components in change detection, urban planning, and monitoring. The automatic extraction of the building from high-resolution aerial imagery is still challenging due to the variations in their shapes, structures, textures, and colours. Recently, the convolutional neural networks (CNN) show a significant improvement in object detection and extraction that surpasses other methods. To extract building, in this paper two segmentation architectures, the UNet and the Inception ResNet UNet are implemented and then tested on the Inria aerial image datasets. The Inception ResNet UNet utilizes the Inception architecture and residual blocks. This makes the model wide and deep, though there are a few differences between numbers of UNet and Inception ResNet UNet parameters. The analyses show that UNet has a high rate of metrics in the training progress. However, on the unseen dataset, Inception ResNet UNet extracts buildings more accurately (97.95% accuracy and 0.96 in the dice metric) in comparison with UNet (94.30% accuracy and 0.55 in the dice metric)

    Survey of Relation between Organizational Learning Elements and Development of Professional Skills of Engineers

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    Abstract:The present study deals with surveying the relation of organization learning and professional development of engineers. The study was conducted as descriptive-correlative work. Statistic society is comprised of 188 engineers of Electro System Fars. As the size of the society is not considerable, the whole society was studies as sample society. For data gathering two questionnaires for assessment of organizational learning and professional skills were used. To make sure validity of the questionnaire the experts were consulted. Regarding reliability, Cronbach’s Alpha was used. Reliability of the questionnaires was obtained 0.93 and 0.87 for learning and professional skill respectively. The data were analyzed regarding Pierson’s correlation and regression analyses and significant relation was found between organizational learning and development of professional skill. Regression analysis showed that organizational learning elements are significant predictor for develop of professional skills. Square sum of 0.476 showed that 47.6 of the distribution in the development of professional skills is determined by organizational learnin

    A Review of the Quality of Engineering Training Programs using Servqual Model

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    In this research, descriptive and surveying method is used to evaluate the quality of engineering training programs. The statistical society of the research consists of 130 engineers of AzarAb Company covered by training programs in 2012. Since the statistical society has a low volume, the whole society is considered as a statistical sample. Data was collected using Servqual standard questionnaire.  The Cronbach Alpha coefficient was used to determine the reliability of the questionnaire and the obtained coefficient was estimated at 91%. To determine the validity of the questionnaire, the comments of several experts from industry and university professors were used and their recommendations and propose amendments were applied to the questionnaire. Data analysis was conducted by dual sample t test to identify the difference of each of the dimensions of the model. The obtained results show that engineers are not satisfied with the quality of trainings and that the provided trainings have not met their expectations

    Exploration of the ISO9000 Quality Management System Introduced to Local Government: The Analysis Based on Five Main Standards

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    随着现代经济的蓬勃发展,国际贸易日益繁荣,科学技术日新月异,政府职能覆盖范围也日益扩大。政府作为公共权力行使者,在整个社会中扮演着非常重要的角色。政府的工作质量关系到政府自身的发展、人们的生活和社会的稳定。地方政府导入ISO9000质量管理体系不仅提高了政府的办事效率,增强了公民满意度,而且为建设服务型政府、全面质量管理型政府、廉洁透明型政府和节约型政府提供了有效途径。在加入了WTO后,如何让我国更好更快地融入了世界经济一体化的进程中,这就对中国政府质量提出了更高的要求。 本文主要采用文献研究和文本分析的方法,通过文献研究法检索和通读国内外有关质量管理相关理论的教材、专著、论文等各种研究成果...With the vigorous development of the modern economy, international trade is growing prosperity and abundance. Science and technology are developing rapidly, The coverage of the government functions is also increasing. The government plays an important role in entire society as a public authority executor. The quality of the governments work relates to government's own development, people's lives a...学位:管理学硕士院系专业:公共事务学院公共管理系_行政管理学号:1392009115045

    Measurement of the cross-section and charge asymmetry of WW bosons produced in proton-proton collisions at s=8\sqrt{s}=8 TeV with the ATLAS detector

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    This paper presents measurements of the W+μ+νW^+ \rightarrow \mu^+\nu and WμνW^- \rightarrow \mu^-\nu cross-sections and the associated charge asymmetry as a function of the absolute pseudorapidity of the decay muon. The data were collected in proton--proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS experiment at the LHC and correspond to a total integrated luminosity of 20.2~\mbox{fb^{-1}}. The precision of the cross-section measurements varies between 0.8% to 1.5% as a function of the pseudorapidity, excluding the 1.9% uncertainty on the integrated luminosity. The charge asymmetry is measured with an uncertainty between 0.002 and 0.003. The results are compared with predictions based on next-to-next-to-leading-order calculations with various parton distribution functions and have the sensitivity to discriminate between them.Comment: 38 pages in total, author list starting page 22, 5 figures, 4 tables, submitted to EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-13

    Measurement of the quasi-elastic axial vector mass in neutrino-oxygen interactions

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    The weak nucleon axial-vector form factor for quasi-elastic interactions is determined using neutrino interaction data from the K2K Scintillating Fiber detector in the neutrino beam at KEK. More than 12,000 events are analyzed, of which half are charged-current quasi-elastic interactions nu-mu n to mu- p occurring primarily in oxygen nuclei. We use a relativistic Fermi gas model for oxygen and assume the form factor is approximately a dipole with one parameter, the axial vector mass M_A, and fit to the shape of the distribution of the square of the momentum transfer from the nucleon to the nucleus. Our best fit result for M_A = 1.20 \pm 0.12 GeV. Furthermore, this analysis includes updated vector form factors from recent electron scattering experiments and a discussion of the effects of the nucleon momentum on the shape of the fitted distributions.Comment: 14 pages, 10 figures, 6 table

    Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in √s=13 TeV pp collisions with the ATLAS detector

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    A search for supersymmetry through the pair production of electroweakinos with mass splittings near the electroweak scale and decaying via on-shell W and Z bosons is presented for a three-lepton final state. The analyzed proton-proton collision data taken at a center-of-mass energy of √s=13  TeV were collected between 2015 and 2018 by the ATLAS experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 139  fb−1. A search, emulating the recursive jigsaw reconstruction technique with easily reproducible laboratory-frame variables, is performed. The two excesses observed in the 2015–2016 data recursive jigsaw analysis in the low-mass three-lepton phase space are reproduced. Results with the full data set are in agreement with the Standard Model expectations. They are interpreted to set exclusion limits at the 95% confidence level on simplified models of chargino-neutralino pair production for masses up to 345 GeV

    Measurement of the Branching Fraction for B- --> D0 K*-

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    We present a measurement of the branching fraction for the decay B- --> D0 K*- using a sample of approximately 86 million BBbar pairs collected by the BaBar detector from e+e- collisions near the Y(4S) resonance. The D0 is detected through its decays to K- pi+, K- pi+ pi0 and K- pi+ pi- pi+, and the K*- through its decay to K0S pi-. We measure the branching fraction to be B.F.(B- --> D0 K*-)= (6.3 +/- 0.7(stat.) +/- 0.5(syst.)) x 10^{-4}.Comment: 7 pages, 1 postscript figure, submitted to Phys. Rev. D (Rapid Communications

    Study of e+e- --> pi+ pi- pi0 process using initial state radiation with BABAR

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    The process e+e- --> pi+ pi- pi0 gamma has been studied at a center-of-mass energy near the Y(4S) resonance using a 89.3 fb-1 data sample collected with the BaBar detector at the PEP-II collider. From the measured 3pi mass spectrum we have obtained the products of branching fractions for the omega and phi mesons, B(omega --> e+e-)B(omega --> 3pi)=(6.70 +/- 0.06 +/- 0.27)10-5 and B(phi --> e+e-)B(phi --> 3pi)=(4.30 +/- 0.08 +/- 0.21)10-5, and evaluated the e+e- --> pi+ pi- pi0 cross section for the e+e- center-of-mass energy range 1.05 to 3.00 GeV. About 900 e+e- --> J/psi gamma --> pi+ pi- pi0 gamma events have been selected and the branching fraction B(J/psi --> pi+ pi- pi0)=(2.18 +/- 0.19)% has been measured.Comment: 21 pages, 37 postscript figues, submitted to Phys. Rev.

    Search for squarks and gluinos in events with isolated leptons, jets and missing transverse momentum at s√=8 TeV with the ATLAS detector

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    The results of a search for supersymmetry in final states containing at least one isolated lepton (electron or muon), jets and large missing transverse momentum with the ATLAS detector at the Large Hadron Collider are reported. The search is based on proton-proton collision data at a centre-of-mass energy s√=8 TeV collected in 2012, corresponding to an integrated luminosity of 20 fb−1. No significant excess above the Standard Model expectation is observed. Limits are set on supersymmetric particle masses for various supersymmetric models. Depending on the model, the search excludes gluino masses up to 1.32 TeV and squark masses up to 840 GeV. Limits are also set on the parameters of a minimal universal extra dimension model, excluding a compactification radius of 1/R c = 950 GeV for a cut-off scale times radius (ΛR c) of approximately 30
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