نتایج جستجو برای: propagation pattern

تعداد نتایج: 451772  

Journal: :Computers in biology and medicine 2013
Fatemeh Saki Amir Tahmasbi Hamid Soltanian-Zadeh Shahriar B. Shokouhi

Classification of breast abnormalities such as masses is a challenging task for radiologists. Computer-aided Diagnosis (CADx) technology may enhance the performance of radiologists by assisting them in classifying patterns into benign and malignant categories. Although Neural Networks (NN) such as Multilayer Perceptron (MLP) have drawbacks, namely long training times, a considerable number of C...

2010
Patrice Pajusco Nadine Malhouroux-Gaffet

The channel capacity of a MIMO telecommunication system depends on different parameters such as the signal-tonoise ratio, the space-time characteristics of the propagation channel, the antenna array geometry and the antenna pattern. However, the propagation channel remains the strongest constraint imposed on designers of new radio air interfaces. Using a MIMO channel model, computer simulations...

Journal: :CoRR 2017
Mehmet Necip Kurt Vasanthan Raghavan Xiaodong Wang

The problem of detecting changes with multiple sensors has received significant attention in the literature. In many practical applications such as critical infrastructure monitoring and modeling of disease spread, a useful change propagation model is one where change eventually happens at all sensors, but where not all sensors witness change at the same time instant. While prior work considere...

2015
Wenting Tu David Wai-Lok Cheung Nikos Mamoulis Min Yang Ziyu Lu

Due to the increasing popularity of microblogging platforms (e.g., Twitter), detecting realtime news from microblogs (e.g., tweets) has recently drawn a lot of attention. Most of the previous work on this subject detect news by analyzing propagation patterns of microblogs. This approach has two limitations: (i) many non-news microblogs (e.g. marketing activities) have propagation patterns simil...

2015
Xiaofeng Zhao Robert W. Talbot

Owing to the absorbing, refracting and scattering effects of the propagation medium, electromagnetic (EM) energy will degrade with the increment of propagation range, and the maximum value exists at the point of the radiating source. Employing this phenomenon, this paper introduces a novel approach to detect the location of EM transmitters in an atmospheric duct environment. Different from prev...

2012
Tihomir Hristov

Radio tracking, communications and guidance at sea rely on interpreting of radar signals. This has motivated extensive studies of the physical factors governing the pattern of signal propagation over the ocean. Although over the last several decades the models of electromagnetic propagation have been substantially advanced (Kukushkin (2004); Levy (2000)), measurements and modeling results still...

2004
Kosuke Hamaguchi Masato Okada Kazuyuki Aihara

Repeated spike patterns have often been taken as evidence for the synfire chain, a phenomenon that a stable spike synchrony propagates through a feedforward network. Inter-spike intervals which represent a repeated spike pattern are influenced by the propagation speed of a spike packet. However, the relation between the propagation speed and network structure is not well understood. While it is...

2007
Karl J. Lieberherr Ignacio Silva-Lepe

Object-oriented programs often have a regular structure where methods are propagated to classes following the part-of and is-a relationships between classes. To abbreviate the description of programs we propose a graph-based propagation notation, called propagation patterns. In addition, we suggest a method for programming with propagation patterns. A propagation pattern consists of an interfac...

2015
Shuko Takeda Susanne Wegmann Hansang Cho Sarah L. DeVos Caitlin Commins Allyson D. Roe Samantha B. Nicholls George A. Carlson Rose Pitstick Chloe K. Nobuhara Isabel Costantino Matthew P. Frosch Daniel J. Müller Daniel Irimia Bradley T. Hyman

Tau pathology is known to spread in a hierarchical pattern in Alzheimer's disease (AD) brain during disease progression, likely by trans-synaptic tau transfer between neurons. However, the tau species involved in inter-neuron propagation remains unclear. To identify tau species responsible for propagation, we examined uptake and propagation properties of different tau species derived from postm...

2016
Akira Fushiki Maarten F Zwart Hiroshi Kohsaka Richard D Fetter Albert Cardona Akinao Nose

Animals move by adaptively coordinating the sequential activation of muscles. The circuit mechanisms underlying coordinated locomotion are poorly understood. Here, we report on a novel circuit for the propagation of waves of muscle contraction, using the peristaltic locomotion of Drosophila larvae as a model system. We found an intersegmental chain of synaptically connected neurons, alternating...

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