Filters








359 Hits in 4.7 sec

Characterization of SDP Designs That Yield Certain Spin Models [article]

Carl Bracken, Gary McGuire
2002 arXiv   pre-print
We characterize the SDP designs that give rise to four-weight spin models with two values. We prove that the only such designs are the symplectic SDP designs.  ...  The proof involves analysis of cardinalities of intersections of four blocks.  ...  Guo and Huang [8] considered certain types of four-weight spin models, which they called "four-weight spin models with exactly two values on W 2 " (we will explain this further in section 2).  ... 
arXiv:math/0212139v1 fatcat:ktkhvo42cvbl3hd4ncnbdnqyn4

Dynamic properties of water in breast pathology depend on the histological compounds: distinguishing tissue malignancy by water diffusion coefficients

Rustem F Baikeev, Roman A Gubanov, Kamil K Sadikov, Sufiya Z Safina, Farhat F Muhamadiev, Timur A Sibgatullin
2014 BMC Research Notes  
The parameters that characterize the intricate water diffusion in tumors may also reveal their distinct pathology.  ...  The present in vitro study aimed to discover connections between the NMR biexponential diffusion parameters [fast diffusion phase (D FDP ), slow diffusion phase (D SDP ), and spin population of fast diffusion  ...  These characteristics imply that intracellular water diffusion cannot be characterized by a single ADC.  ... 
doi:10.1186/1756-0500-7-887 pmid:25487139 pmcid:PMC4295355 fatcat:wfbaow23ibfovnd5h7usik6goq

The Spin-Plane Double Probe Electric Field Instrument for MMS [chapter]

P.-A. Lindqvist, G. Olsson, R. B. Torbert, B. King, M. Granoff, D. Rau, G. Needell, S. Turco, I. Dors, P. Beckman, J. Macri, C. Frost (+9 others)
2016 Magnetospheric Multiscale  
The mechanical and electrical design of SDP is described, together with results from ground tests and calibration of the instrument.  ...  The Spin-plane double probe instrument (SDP) is part of the FIELDS instrument suite of the Magnetospheric Multiscale mission (MMS).  ...  Acknowledgements The Swedish contributions to SDP were funded by the Swedish National Space  ... 
doi:10.1007/978-94-024-0861-4_6 fatcat:2hsxdfbagnelfkmh2tnjl73tvm

The Spin-Plane Double Probe Electric Field Instrument for MMS

P.-A. Lindqvist, G. Olsson, R. B. Torbert, B. King, M. Granoff, D. Rau, G. Needell, S. Turco, I. Dors, P. Beckman, J. Macri, C. Frost (+9 others)
2014 Space Science Reviews  
The mechanical and electrical design of SDP is described, together with results from ground tests and calibration of the instrument.  ...  The Spin-plane double probe instrument (SDP) is part of the FIELDS instrument suite of the Magnetospheric Multiscale mission (MMS).  ...  Acknowledgements The Swedish contributions to SDP were funded by the Swedish National Space  ... 
doi:10.1007/s11214-014-0116-9 fatcat:ftxw7yhg6jc3vgi57hhpjgkwem

How Robust are Reconstruction Thresholds for Community Detection? [article]

Ankur Moitra and William Perry and Alexander S. Wein
2016 arXiv   pre-print
We also explore this question in the broadcast tree model, and we show that the viewpoint of semirandom models can help explain why some algorithms are preferred to others in practice, in spite of the  ...  Here we revisit the stochastic block model from the perspective of semirandom models where we allow an adversary to make 'helpful' changes that strengthen ties within each community and break ties between  ...  Acknowledgements The authors would like to thank Philippe Rigollet and the MIT learning theory group for helpful discussion, and Roxane Sayde for reading a draft of this document.  ... 
arXiv:1511.01473v2 fatcat:ngxa6gwg6jbpdjdhp7cn4vef7i

How robust are reconstruction thresholds for community detection?

Ankur Moitra, William Perry, Alexander S. Wein
2016 Proceedings of the 48th Annual ACM SIGACT Symposium on Theory of Computing - STOC 2016  
We also explore this question in the broadcast tree model, and we show that the viewpoint of semirandom models can help explain why some algorithms are preferred to others in practice, in spite of the  ...  Here we revisit the stochastic block model from the perspective of semirandom models where we allow an adversary to make 'helpful' changes that strengthen ties within each community and break ties between  ...  Acknowledgements The authors would like to thank Philippe Rigollet and the MIT learning theory group for helpful discussion, and Roxane Sayde for reading a draft of this document.  ... 
doi:10.1145/2897518.2897573 dblp:conf/stoc/MoitraPW16 fatcat:zvovpzhbs5fqbok72vwgnntgca

First observation and amplitude analysis of theB−→D+K−π−decay

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle (+692 others)
2015 Physical Review D  
The D_J^*(2760)^0 resonance is determined to have spin 1.  ...  An amplitude analysis of the resonant structure of the B^-→ D^+K^-π^- decay is used to measure the contributions from quasi-two-body B^-→ D_0^*(2400)^0K^-, B^-→ D_2^*(2460)^0K^-, and B^-→ D_J^*(2760)^0K  ...  Simulated events are used to characterize the detector response to signal and certain types of background events.  ... 
doi:10.1103/physrevd.91.092002 fatcat:h2grdufeezf23gux7fr2tvhieu

Compressed Sensing Recoverability In Imaging Modalities [article]

Mahdi S. Hosseini, Konstantinos N. Plataniotis
2012 arXiv   pre-print
The effectiveness of the various designed patterns for sparse image recovery is studied through numerical experiments.  ...  This is done using the fact that the Spherical Section Property (SSP) of a sensing matrix provides a lower bound for unique sparse recovery condition.  ...  Following these developments, this paper studies the recoverability conditions for sparse signals in CS imaging modalities that are characterized in terms of a (given): • Sub-Sampling pattern: which defines  ... 
arXiv:1212.1187v1 fatcat:mj4xlie2hjbffdveyr4gp5trvu

Combinatorial Black-box Optimization for Vehicle Design Problem [article]

Ami S. Koshikawa, Masayuki Ohzeki, Masamichi J. Miyama, Kazuyuki Tanaka, Yusaku Yamashita, Johannes Stadler, Oliver Wick
2021 arXiv   pre-print
We demonstrate the use of BOCS and its variant for a vehicle design problem, which cannot be described in the QUBO form.  ...  A surrogate model used in BOCS is the quadratic unconstrained binary optimization (QUBO) form.  ...  In a previous study, a benchmarking test of BOCS was performed using a two-body Ising spin glass model as a black-box function. 34) In this test, a sparseness parameter that controlled the number of  ... 
arXiv:2110.00226v1 fatcat:he6zmpmokrh53a6y2guhn54tte

Optimal solutions and ranks in the max-cut SDP [article]

Daniel Hong, Hyunwoo Lee, Alex Wei
2021 arXiv   pre-print
The best polynomial time approximation scheme relies on semidefinite programming (SDP). We study the conditions under which graphs of certain classes have rank 1 solutions to the max-cut SDP.  ...  We then characterize the SDP solutions upon joining two triangle graphs by an edge sum.  ...  In statistical physics and magnetism, the Edwards-Anderson model for the ground states of spin glasses is an optimization problem in ±1-variables and can be reduced to the max-cut problem.  ... 
arXiv:2109.02238v1 fatcat:7erpnfns6jdtzejvgofkckm4jm

Dalitz plot analysis ofBs0→D¯0K−π+decays

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle (+692 others)
2014 Physical Review D  
model.  ...  A structure at m(D̅^0 K^-) ≈ 2.86 GeV/c^2 is found to be an admixture of spin-1 and spin-3 resonances.  ...  Simulated events are used to characterize the detector response to signal and certain types of background events.  ... 
doi:10.1103/physrevd.90.072003 fatcat:uhsjkyn2u5dfffj7dmst5qrane

Application of fermionic marginal constraints to hybrid quantum algorithms [article]

Nicholas C. Rubin, Ryan Babbush, Jarrod McClean
2018 arXiv   pre-print
Many quantum algorithms, including recently proposed hybrid classical/quantum algorithms, make use of restricted tomography of the quantum state that measures the reduced density matrices, or marginals  ...  We show that one can use fermionic n-representability conditions to reduce the total number of measurements required by more than an order of magnitude for medium sized systems in chemistry.  ...  measurement variance, and Sergio Boixo for helpful conversations about concentration of measure in random states.  ... 
arXiv:1801.03524v1 fatcat:zzm4tm2knjfkddntjvvhajovyq

Precise lower bound on Monster brane boundary entropy [article]

Daniel Friedan, Anatoly Konechny, Cornelius Schmidt-Colinet
2013 arXiv   pre-print
The same analysis applied to a second bulk CFT -- a certain c=2 Gaussian model -- yields a less strict bound, suggesting that the precise linear functional bound on s for the Monster CFT is exceptional  ...  We show that all g=1 branes must have the same low-lying boundary spectrum, which matches the spectrum of the known g=1 branes, suggesting that the known examples comprise all possible g=1 branes, and  ...  The second bulk CFT we study is a certain c = 2 Gaussian model -a nonlinear model with a particular two-torus as target manifold.  ... 
arXiv:1305.2122v1 fatcat:rqz3cu5knrdotiz4a74texwgum

Amplitude analysis ofB0→D¯0K+π−decays

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle (+708 others)
2015 Physical Review D  
The data are described by an amplitude model that contains contributions from intermediate K^*(892)^0, K^*(1410)^0, K^*_2(1430)^0 and D^*_2(2460)^- resonances.  ...  The model obtained will be an integral part of a future determination of the angle γ of the CKM quark mixing matrix using B^0 → D K^+ π^- decays.  ...  Simulated events are used to characterize the detector response to signal and certain types of background events.  ... 
doi:10.1103/physrevd.92.012012 fatcat:cxd5mvnjtjerjiaxj7rxlx6bna

Commutative association schemes

William J. Martin, Hajime Tanaka
2009 European journal of combinatorics (Print)  
The goal of the present survey is to discuss the most important new developments in several directions, including Gelfand pairs, cometric association schemes, Delsarte Theory, spin models and the semidefinite  ...  Association schemes were originally introduced by Bose and his co-workers in the design of statistical experiments.  ...  The work of HT was supported by JSPS Grantin-Aid for Scientific Research no. 20740003.  ... 
doi:10.1016/j.ejc.2008.11.001 fatcat:nk5enmppxrcaxglqv52wghbohu
« Previous Showing results 1 — 15 out of 359 results