نتایج جستجو برای: online detection

تعداد نتایج: 810429  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران - دانشکده فنی و مهندسی 1389

کنترل نویز به روش فعال (anc) تکنیکی است که نویز هایی با فرکانس پایین را به طور موثر کاهش می دهد.در این سیستم از فیلتر های وفقی به منظور تولید سیگنال ضد نویز استفاده می شود . یکی از الگوریتمهای وفقی که در سیستم anc مورد استفاده قرار می گیرد الگوریتم least mean square(lms) می باشد.اما به دلیل تاخیری که مسیر ثانویه ناشی از ادوات الکترونیکی ومسیر عبور سیگنال در این سیستم ایجاد می کند، سبب می شود که...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده علوم 0

تا بحال طیف سنجی نوترونهای سریع به صورت offline انجام می گرفته که محققین و پزشکان را با مشکلات زیادی مواجه می کرد، چرا اولا سیستم خاصیت برگشت پذیری نداشته و ثالثا زمان زیادی برای بدست آوردن طیف انرژی لازم بود. طراحی سیستم offline به این صورت است که بعد از آشکارساز باید از یک سیستم جداسازی نوترون و کاما استفاده کرد که معمولا از روش کسر ثابت یا گذر از صفر برای این منظور استفاده می شود (که روشهای ...

1997
Beth A. Schroeder Karsten Schwan Sudhir Aggarwal

Hazard situations in safety-critical systems are typically complex, so there is a need for means to detect complex hazards and react in a timely and meaningful way. This paper addresses the problem of hazard detection through the development of an on-line analysis tool. The approach allows the user to specify complex multi-source hazards using a query-like language, uses both synchronous and as...

2002
M. Kezunovic S. Vasilic F. Gul - Bagriyanik

This paper introduces two new techniques: one for fault detection and classification and one for fault location. The techniques are quite unconventional and have numerous advantages over the existing techniques used for the same purpose. In a combination, the two techniques may be used to improve either the protective relaying of transmission lines or the off-line fault analysis. Some simulatio...

2000
Jinhong Katherine Guo David S. Doermann Azriel Rosenfeld

Research has been active in the field offorgeiy detection, but relatively little work has been done on the detection of skilled forgeries. In this paper, we present an algorithm for detecting skilled forgeries based on a local correspondence between a questioned signature and a model obtained a priori. Writer-dependent properties are measured at the substroke level and a cost function is traine...

2000
Dragan Gamberger Nada Lavrac Goran Krstacic Tomislav Smuc

The work presents the results of inconsistency detection experiments on the data records of an atherosclerotic coronary heart disease database collected in the regular medical practice. Medical expert evaluation of some preliminary inductive learning results have demonstrated that explicit detection of outliers can be useful for maintaining the data quality of medical records and that it might ...

2002
Aurora Pons-Porrata Rafael Berlanga Llavori José Ruiz-Shulcloper

In this paper we propose an incremental clustering algorithm for event detection, which makes use of the temporal references in the text of newspaper articles. This algorithm is hierarchically applied to a set of articles in order to discover the structure of topics and events that they describe. In the first level, documents with a high temporal-semantic similarity are clustered together into ...

2013
S. M. Shashidhara

Through this paper issue of on-line detection of short winding fault in three-phase induction motors is presented, and a technique, based on the computer-aided monitoring of the stator current Park’s Vector, is proposed. The park's vector model is realized by employing Virtual instrumentation. The Virtual Instrumentation is acquired by programming in Lab-view software. Laboratory analysis was p...

2013
Matthias Borowski Nikolaus Rudak Birger Hussong Dominik Wied Sonja Kuhnt Wolfgang Tillmann

The detection of structural changes in time series from industrial processes monitoring is of great interest. We investigate the limits and possibilities of two recently developed methods, one for the off-line detection of changed volatilities [Wied et al., 2011] and one for the on-line detection of changes in the course of the time series [Borowski and Fried, 2011]. The investigation is carrie...

Journal: :international journal of information science and management 0
ching-chuan lin department of business administration national chiayi university chiayi te-king chien department of information management national formosa university yunlin

recently, internet is widely used in our daily life, caused online customer growing rapidly, then the amount of online store rising quickly. therefore, it is an important issue for online stores to stand out from the crowd, even boost sales and profit. many enterprises had invested resource on online store, but great amount of stores were closedown. the major reason is operator spend many effor...

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