Filters








1,035 Hits in 1.5 sec

A Noniterative Simultaneous Rigid Registration Method for Serial Sections of Biological Tissues

Chang Shu, Lin-Lin Li, Guoqing Li, Xi Chen, Hua Han
2020 Applied Sciences  
In this paper, we propose a novel noniterative algorithm to simultaneously estimate optimal rigid transformations for serial section images, which is a key component in performing volume reconstructions of serial sections of biological tissue. To avoid the error accumulation and propagation caused by current algorithms, we add an extra condition: that the positions of the first and last section images should remain unchanged. This constrained simultaneous registration problem has not previously
more » ... been solved. Our solution is noniterative; thus, it can simultaneously compute rigid transformations for a large number of serial section images in a short time. We demonstrate that our algorithm obtains optimal solutions under ideal conditions and shows great robustness under nonideal circumstances. Further, we experimentally show that our algorithm outperforms state-of-the-art methods in terms of speed and accuracy.
doi:10.3390/app10031156 fatcat:czpd6fw54ze6je4urkw4ggui4u

Evidence for water-filled cracks in earthquake source regions

Guoqing Lin, Peter M. Shearer
2009 Geophysical Research Letters  
(b) P velocity versus S velocity from the 3D seismic velocity model by Lin et al. [2007b] .  ...  This is discussed by Lin and Shearer [2007] , who performed synthetic tests to assess the accuracy of the technique.  ... 
doi:10.1029/2009gl039098 fatcat:gkxsmzo6vje7deubcsy2h6ddum

Semiparametric Methods for Mapping Quantitative Trait Loci with Censored Data

Guoqing Diao, D. Y. Lin
2005 Biometrics  
Recently, Diao, Lin, and Zou (2004) developed simple likelihood-based methods under the same model but with the baseline hazard function parameterized.  ... 
doi:10.1111/j.1541-0420.2005.00346.x pmid:16135030 fatcat:emz2wrvzcfbipl2e52oiy7isqu

NPP VIIRS geometric performance status

Guoqing Lin, Robert E. Wolfe, Masahiro Nishihama, James J. Butler, Xiaoxiong Xiong, Xingfa Gu
2011 Earth Observing Systems XVI  
Visible Infrared Imager Radiometer Suite (VIIRS) instrument on-board the National Polar-orbiting Operational Environmental Satellite System (NPOESS) Preparatory Project (NPP) satellite is scheduled for launch in October, 2011. It is to provide satellite measured radiance/reflectance data for both weather and climate applications. Along with radiometric calibration, geometric characterization and calibration of Sensor Data Records (SDRs) are crucial to the VIIRS Environmental Data Record (EDR)
more » ... gorithms and products which are used in numerical weather prediction (NWP). The instrument geometric performance includes: 1) sensor (detector) spatial response, parameterized by the dynamic field of view (DFOV) in the scan direction and instantaneous FOV (IFOV) in the track direction, modulation transfer function (MTF) for the 17 moderate resolution bands (M-bands), and horizontal spatial resolution (HSR) for the five imagery bands (I-bands); 2) matrices of band-to-band co-registration (BBR) from the corresponding detectors in all band pairs; and 3) pointing knowledge and stability characteristics that includes scan plane tilt, scan rate and scan start position variations, and thermally induced variations in pointing with respect to orbital position. They have been calibrated and characterized through ground testing under ambient and thermal vacuum conditions, numerical modeling and analysis. This paper summarizes the results, which are in general compliance with specifications, along with anomaly investigations, and describes paths forward for characterizing on-orbit BBR and spatial response, and for improving instrument on-orbit performance in pointing and geolocation.
doi:10.1117/12.894652 fatcat:rosh4may4raffenqrqi674rpte

Field-induced Metal-Insulator Transition in β-EuP_3 [article]

Guangqiang Wang, Guoqing Chang, Huibin Zhou, Wenlong Ma, Hsin Lin, M. Zahid Hasan, Su-Yang Xu, Shuang Jia
2020 arXiv   pre-print
Metal-insulator transition (MIT) is one of the most conspicuous phenomena in correlated electron systems. However such transition has rarely been induced by an external magnetic field as the field scale is normally too small compared with the charge gap. In this paper we present the observation of a magnetic-field-driven MIT in a magnetic semiconductor β-EuP_3. Concomitantly, we found a colossal magnetoresistance (CMR) in an extreme way: the resistance drops billionfold at 2 kelvins in a
more » ... c field less than 3 teslas. We ascribe this striking MIT as a field-driven transition from an antiferromagnetic and paramagnetic insulator to a spin-polarized topological semimetal, in which the spin configuration of Eu^2+ cations and spin-orbital coupling (SOC) play a crucial role. As a phosphorene-bearing compound whose electrical properties can be controlled by the application of field, β-EuP_3 may serve as a tantalizing material in the basic research and even future electronics.
arXiv:2007.07465v1 fatcat:wi4xnyb2brglnbtwwh2mdyhrhm

Topological semimetals and topological insulators in rare earth monopnictides [article]

Minggang Zeng, Chen Fang, Guoqing Chang, Yu-An Chen, Timothy Hsieh, Arun Bansil, Hsin Lin, Liang Fu
2015 arXiv   pre-print
We use first principles calculations to study the electronic properties of rock salt rare earth monopnictides LaX (X=N, P, As, Sb, Bi). A new type of topological band crossing termed 'linked nodal rings' is found in LaN when the small spin-orbital coupling (SOC) on nitrogen orbitals is neglected. Turning on SOC gaps the nodal rings at all but two points, which remain gapless due to C_4-symmetry and leads to a 3D Dirac semimetal. Interestingly, unlike LaN, compounds with other elements in the
more » ... ctogen group are found to be topological insulators (TIs), as a result of band reordering due to the increased lattice constant as well as the enhanced SOC on the pnictogen atom. These TI compounds exhibit multi-valley surface Dirac cones at three M̅-points on the (111)-surface.
arXiv:1504.03492v1 fatcat:u47mqgf2evdrveqoznydz4sohy

Low Resolution Information Also Matters: Learning Multi-Resolution Representations for Person Re-Identification [article]

Guoqing Zhang, Yuhao Chen, Weisi Lin, Arun Chandran, Xuan Jing
2021 arXiv   pre-print
As a prevailing task in video surveillance and forensics field, person re-identification (re-ID) aims to match person images captured from non-overlapped cameras. In unconstrained scenarios, person images often suffer from the resolution mismatch problem, i.e., Cross-Resolution Person Re-ID. To overcome this problem, most existing methods restore low resolution (LR) images to high resolution (HR) by super-resolution (SR). However, they only focus on the HR feature extraction and ignore the
more » ... information from original LR images. In this work, we explore the influence of resolutions on feature extraction and develop a novel method for cross-resolution person re-ID called Multi-Resolution Representations Joint Learning (MRJL). Our method consists of a Resolution Reconstruction Network (RRN) and a Dual Feature Fusion Network (DFFN). The RRN uses an input image to construct a HR version and a LR version with an encoder and two decoders, while the DFFN adopts a dual-branch structure to generate person representations from multi-resolution images. Comprehensive experiments on five benchmarks verify the superiority of the proposed MRJL over the relevent state-of-the-art methods.
arXiv:2105.12684v1 fatcat:wdesaeghrff53mqw7q43ttkjsq

JPSS-1 VIIRS at-launch geometric performance

Guoqing Lin, Robert E. Wolfe, James J. Butler, Xiaoxiong (Jack) Xiong, Xingfa Gu
2016 Earth Observing Systems XXI  
 Side-lobes of M11 in SNPP disappear in J1  Right focus for VisNIR FPA/bands in J1, while defocused/shorter EFL in SNPP M16B MTF Band/Det 0.25NF 0.50NF 0.75NF 1.00NF Scan LSF --MTF Lin  ...  526 km 0 km HSI Scan (m) 774(258) 1161(387) 774(387) 1295(648) 648(648) 1658(1658) HSI Track (m) 741 893 1123 1627 Sample No. 1600(3152) 1009(1377) 1008(1376) 641(641) 640(640) 1(1) Lin  ... 
doi:10.1117/12.2238804 dblp:conf/eos/LinW16 fatcat:lfcwvs6xkbfh7dzhglhxfyxz2y

Conjugated polymer-enhanced enantioselectivity in fluorescent sensing

Xuepeng Zhang, Chao Wang, Pan Wang, Jiajun Du, Guoqing Zhang, Lin Pu
2016 Chemical Science  
A new strategy to use conjugated polymers to conduct fluorescent enhancement sensing has been developed.
doi:10.1039/c6sc00266h pmid:29997853 pmcid:PMC6008581 fatcat:crzfg6m6iregzhfsratytvdjw4

Fibrillin-3 expression in human development

Laetitia Sabatier, Nicolai Miosge, Dirk Hubmacher, Guoqing Lin, Elaine C. Davis, Dieter P. Reinhardt
2011 Matrix Biology  
., 2001; Lin et al., 2002; Sabatier et al., 2009 ). An overview of these fragments is presented in Fig. 1A .  ... 
doi:10.1016/j.matbio.2010.10.003 pmid:20970500 pmcid:PMC4961473 fatcat:6fgvnmyzpnazljpt6wjikcbj74

Highly efficient spectrally encoded imaging using a 45° tilted fiber grating

Guoqing Wang, Chao Wang, Zhijun Yan, Lin Zhang
2016 Optics Letters  
A novel highly efficient, fiber-compatible spectrally encoded imaging (SEI) system using a 45° tilted fiber grating (TFG) is proposed and experimentally demonstrated for the first time. The TFG serves as an infiber lateral diffraction element, eliminating the need for bulky and lossy free-space diffraction gratings in conventional SEI systems. Under proper polarization control, due to the strong tilted reflection, the 45° TFG offers a diffraction efficiency as high as 93.5%. Our new design
more » ... ficantly reduces the volume of the SEI system, improves energy efficiency and system stability. As a proof-of-principle experiment, spectrally encoded imaging of a customer-designed sample (9.6 mm × 3.0 mm) using the TFG-based system is demonstrated. The lateral resolution of the SEI system is measured to be 42 m in our experiment
doi:10.1364/ol.41.002398 pmid:27244373 fatcat:4orlq2qmhfhw5gx6o3ewh57eyy

Network Coding Scheme Based on Key Nodes

Lin Guoqing, Wang Jing, Wang Xinmei
2007 2007 International Conference on Parallel Processing Workshops (ICPPW 2007)  
With the same routing algorithm and network coding scheme, the complexity of network coding (NC) increases with the network scale. In this paper, a network coding scheme based on key nodes is proposed, which is that only the subnet consists of important nodes adopts NC. Using this scheme, the scale of the network that performs NC is reduced, and the complexity of NC is decreased. In wireless network, choosing the steady-going existing nodes as key nodes can increase the stability of network
more » ... cture. For Some especial network which can not adopt linear NC, part nodes can be chosen as key nodes to perform NC. For super large network, the backbone nodes can be chosen as key nodes.
doi:10.1109/icppw.2007.59 dblp:conf/icppw/LinWW07 fatcat:zaj2zrs73fdctdkzhpnfwj3zya

Temporal Evolution of Water Quality in the Typical Semiarid Regiona

Lin Guoqing, Miao Xiaoyu, Ding Jidong, Zheng Xilai
2012 Procedia Environmental Sciences  
., Lin Q.Q.. Analysis on nitrogen pollution and eutrophication of the large and medium reservoirs for water supply in Guangdong Province. Chinese Journal of Ecology. 2004(3): 63-67.  ... 
doi:10.1016/j.proenv.2012.01.444 fatcat:vtwbmkndsbecdh2im45zbkmlie

Semiparametric methods for genome-wide linkage analysis of human gene expression data

Guoqing Diao, DY Lin
2007 BMC Proceedings  
Lin and Zou [6] and Lin [7] proposed an efficient Monte Carlo approach to adjusting for multiple comparisons in a genomic study.  ...  [4] , as is shown in the simulation studies in Diao and Lin [3] . Moreover, the SQTL approach is rank-based and less sensitive to non-normality and outliers.  ... 
doi:10.1186/1753-6561-1-s1-s83 pmid:18466586 pmcid:PMC2367566 fatcat:opn6nnvdzbhxbi4kf2k2ntyedm

A Fermi Arc Quantum Ladder [article]

Tyler A. Cochran, Guoqing Chang, Ilya Belopolski, Kaustuv Manna, Daniel S. Sanchez, Zǐjiā Chéng, Jia-Xin Yin, Horst Borrmann, Jonathan Denlinger, Claudia Felser, Hsin Lin, M. Zahid Hasan
2020 arXiv   pre-print
Known topological quantum matter, including topological insulators and Dirac/Weyl semimetals, often hosts robust boundary states in the gaps between bulk bands in energy-momentum space. Beyond one-gap systems, quantum crystals may also feature more than one inter-band gap. The manifestation of higher-fold topology with multiple nontrivial gaps in quantum materials remains elusive. In this work, we leverage a photoemission spectroscopy probe to discover the multi-gap topology of a chiral fermion
more » ... material. We identify two sets of chiral surface states. These Fermi arcs exhibit an emergent ladder structure in energy-momentum space, unprecedented in topological materials. Furthermore, we determine the multi-gap chiral charge C=(2,2). Our results provide a general framework to explore future complex topological materials.
arXiv:2004.11365v1 fatcat:t76enl2jgrgqvm2zhbijkyi3ge
« Previous Showing results 1 — 15 out of 1,035 results