Results 151 to 160 of about 2,412,507 (179)
Some of the next articles are maybe not open access.
Nonparametric regression estimators in dual frame surveys
Communications in statistics. Simulation and computation, 2019Dual frame surveys, in which independent samples are selected from two frames to decrease survey costs or to improve coverage, can present challenges for regression estimation because of complex designs and unknown degree of overlap. In this research, we
Yan Lu, Ye Fu, Guoyi Zhang
semanticscholar +1 more source
Acta Applicandae Mathematicae, 2008
Frames provide unconditional basis-like, but generally nonunique, representations of vectors in a Hilbert space H. The redundancy of frame expansions allows the flexibility of choosing different dual sequences to employ in frame representations. In particular, oblique duals, Type I duals, and Type II duals have been introduced in the literature because
Jae Kun Lim +2 more
openaire +2 more sources
Frames provide unconditional basis-like, but generally nonunique, representations of vectors in a Hilbert space H. The redundancy of frame expansions allows the flexibility of choosing different dual sequences to employ in frame representations. In particular, oblique duals, Type I duals, and Type II duals have been introduced in the literature because
Jae Kun Lim +2 more
openaire +2 more sources
IEEE Transactions on Vehicular Technology, 2020
In this work, wideband dual-polarized dielectric resonator antenna (DRA) arrays are designed for 5G mobile handsets and integrated with the sub-6GHz antenna. The dielectric resonators, surrounded by concentric air holes and metal vias, are excited by two
Hui Li, Yibo Cheng, Liang Mei, Lei Guo
semanticscholar +1 more source
In this work, wideband dual-polarized dielectric resonator antenna (DRA) arrays are designed for 5G mobile handsets and integrated with the sub-6GHz antenna. The dielectric resonators, surrounded by concentric air holes and metal vias, are excited by two
Hui Li, Yibo Cheng, Liang Mei, Lei Guo
semanticscholar +1 more source
VLSI Implementation of an Interference Canceller Using Dual-Frame Processing for OFDM-IDMA Systems
IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences, 2015Due to increasing demand for machine-to-machine (M2M) communication, simultaneous connections for many terminals are requested for current wireless communication systems.
S. Yoshizawa, Mai Nozaki, H. Tanimoto
semanticscholar +1 more source
Dual-Polarized Frame-Integrated Slot Arrays for 5G Mobile Handsets
IEEE Antennas and Wireless Propagation Letters, 2020In this letter, dual-polarized cavity-backed bow-tie slot arrays are designed and integrated on the frame of the mobile handset. The bandwidth is firstly enhanced for the cavity-backed slot antenna using hybrid modes, with a wide band of 4.1 GHz achieved
Hui Li, Yibo Cheng, Liang Mei, Fei Wu
semanticscholar +1 more source
Hilbert–Schmidt frames and their duals
International Journal of Wavelets, Multiresolution and Information Processing, 2021The concept of Hilbert–Schmidt frame (HS-frame) was first introduced by Sadeghi and Arefijamaal in 2012. It is more general than [Formula: see text]-frames, and thus, covers many generalizations of frames. This paper addresses the theory of HS-frames.
Ya-Nan Li, Yun-Zhang Li
openaire +2 more sources
The Structural design of tall and special buildings, 2020
In this paper, concentric braced frames are combined with moment‐resisting frame (MRF) as a dual system subjected to near‐field (NF) pulse‐like and far‐field ground motions.
H. Beiraghi, Hao Zhou
semanticscholar +1 more source
In this paper, concentric braced frames are combined with moment‐resisting frame (MRF) as a dual system subjected to near‐field (NF) pulse‐like and far‐field ground motions.
H. Beiraghi, Hao Zhou
semanticscholar +1 more source
Optimal dual frames for uniform frames with erasures
2015 12th International Conference on Fuzzy Systems and Knowledge Discovery (FSKD), 2015Given a frame as a coder, its optimal dual as encoder can make the reconstruction error arising from erasure minimum. According to the eigenvalues of the frame operator, we give some sufficient conditions under which the unique optimal dual frame can be identified.
Qing Gao +3 more
openaire +2 more sources
Equiangular Frames and Their Duals
2021Systems of m equiangular lines spanning \(\mathbb {R}^d\) or \(\mathbb {C}^d\) that satisfy the so-called Welch bound have recently gained a lot of attention due to various applications in signal processing. Such sets are called equiangular tight frames (ETFs).
openaire +2 more sources
A Case of a Dual Frame of Reference
Perception, 1992It is demonstrated that observers may relate to two parts of the same object by using two different frames of reference. Subjects were asked to indicate directions within a model of a hallway in which signs were posted on a single prism. The majority of subjects interpreted a sign frontally facing them as indicating the direction which is ahead of ...
openaire +3 more sources