Optimizing the Target Error Rate for Link Adaptation

2014 ◽  
Author(s):  
Sungwoo Park ◽  
Robert C. Daniels ◽  
Robert W. Heath
Keyword(s):  
Error Rate ◽  
Link Adaptation ◽  
Target Error

scholarly journals PENERAPAN METODE LEARNING VECTOR QUANTIZATION UNTUK IDENTIFIKASI PENYAKIT PADI BERDASARKAN BENTUK BERCAK DAUN

2020 ◽  
Vol 6 (1) ◽  
pp. 28-35
Author(s):  
Ery Murniyasih ◽  
Luluk Suryani
Keyword(s):  
Vector Quantization ◽  
Error Rate ◽  
Learning Vector Quantization ◽  
Learning Rate ◽  
Rate Data ◽  
Target Error

Penelitian ini bertujuan : (1). Membuat suatu aplikasi untuk identifikasi jenis penyakit pada tanaman padi berdasarkan bentuk bercak daun padi.;(2). Menerapkan metode Learning Vector Quantization (LVQ) pada identifikasi penyakit tanaman padi. Pada tahapan learning dan testing pada LVQ citra diproses menjadi Grayscale, Thresholding, dan segmentasi. Di tahap pelatihan, metode LVQ digunakan untuk menentukan bobot, target error, max epoch, dan laju pelatihan (Learning rate). Data yang dijadikan sebagai input adalah citra identifikasi jenis penyakit tanaman padi berdasarkan bentuk bercak daun padi  yaitu dengan ukuran piksel 95x35 dan berekstensi BITMAP (.bmp). Standar keberhasilan sistem identifikasi ini adalah menghitung nilai Termination Error Rate dan tingkat keakuratan dalam identifikasi bentuk bercak daun. Dari simulasi ini diperoleh struktur Jaringan Syaraf Tiruan dengan jumlah nilai learning rate 0,02 dan jumlah epoch sebesar 5 kali. Sistem yang terbentuk mampu mengenali citra yang berisi bentuk bercak daun yang digunakan sebagai bobot dengan nilai keakuratan optimum yaitu 73,33% dengan komposisi penyakit bercak coklat (BC) 20 %, Blast  20 % dan cercak cercospora 33,33%.

scholarly journals SIMULASI PENGENALAN TULISAN MENGGUNAKAN LVQ (LEARNING VECTOR QUANTIZATION )

MATICS ◽  
2012 ◽  
Author(s):  
Fachrul Kurniawan ◽  
Hani Nurhayati
Keyword(s):  
Vector Quantization ◽  
Error Rate ◽  
Learning Vector Quantization ◽  
Learning Rate ◽  
Rate Data ◽  
Gray Scale ◽  
Target Error

<p>Proses simulasi yang dilakukan untuk menghasilkan sebuah sistem pengenalan meliputi beberapa tahap, yaitu tahap pengolahan citra dan  tahap pelatihan dan pengenalan. Tahap pengolahan citra dimulai dari Gray Scale,  Thresholding, segmentasi, dan normalisasi. Pengolahan citra diperlukan untuk memudahkan pengolahan data gambar sebelum masuk dalam tahap pelatihan. Kemudian tahap kedua adalah pelatihan dan pengenalan. Pada tahap ini, metode LVQ mulai digunakan dan menentukan bobot, target error, maxepoch, dan laju pelatihan (Learning rate). Data yang dijadikan sebagai input adalah citra huruf yang dinormalisasi sehingga berukuran 20x20 dan berekstensi bitmap (.bmp). Simulasi pengenalan tulisan ini dilakukan dalam beberapa tahapan sehingga bisa dengan membuat pengenalan menjadi lebih tajam. Tolak ukur keberhasilan sistem pengenalan tulisan tangan ini adalah dengan menghitung nilai Termination Error Rate dan tingkat keakuratan dalam pengenalan tanda tangan. Dari simulasi ini diperoleh struktur JST dengan jumlah nilai learning rate 0,003 nilai target error 0,00001 dan jumlah epoch sebesar 10.000 karena dalam rentang epoch 1000 sampai 10000 perubahan  epoch tidak mempengaruhi kinerja sistem. Sistem yang terbentuk mampu mengenali citra yang berisi huruf yang digunakan sebagai bobot dengan nilai keakuratan rata – rata sebesar  61,07% dan rata – rata keakuratan hasil pengenalan terhadap citra yang belum dilakukan pembelajaran sebesar 48,17%.</p><p> </p><strong>Kata Kunci</strong> : Pengolahan Citra, Learning Vector Quantization

Perceptual Characteristics of Consonant Production in Apraxia of Speech and Aphasia

2019 ◽  
Vol 28 (4) ◽  
pp. 1411-1431 ◽  
Author(s):  
Lauren Bislick ◽  
William D. Hula
Keyword(s):  
Error Rate ◽  
Error Rates ◽  
Group Differences ◽  
Diagnostic Process ◽  
Apraxia Of Speech ◽  
Contextual Variables ◽  
Error Type ◽  
Type Distribution ◽  
Phonetic Features ◽  
Syllable Position

Purpose This retrospective analysis examined group differences in error rate across 4 contextual variables (clusters vs. singletons, syllable position, number of syllables, and articulatory phonetic features) in adults with apraxia of speech (AOS) and adults with aphasia only. Group differences in the distribution of error type across contextual variables were also examined. Method Ten individuals with acquired AOS and aphasia and 11 individuals with aphasia participated in this study. In the context of a 2-group experimental design, the influence of 4 contextual variables on error rate and error type distribution was examined via repetition of 29 multisyllabic words. Error rates were analyzed using Bayesian methods, whereas distribution of error type was examined via descriptive statistics. Results There were 4 findings of robust differences between the 2 groups. These differences were found for syllable position, number of syllables, manner of articulation, and voicing. Group differences were less robust for clusters versus singletons and place of articulation. Results of error type distribution show a high proportion of distortion and substitution errors in speakers with AOS and a high proportion of substitution and omission errors in speakers with aphasia. Conclusion Findings add to the continued effort to improve the understanding and assessment of AOS and aphasia. Several contextual variables more consistently influenced breakdown in participants with AOS compared to participants with aphasia and should be considered during the diagnostic process. Supplemental Material https://doi.org/10.23641/asha.9701690

Using the Computer to Minimize SDS User Error Rate and Facilitate SDS Interpretation and Research

1978 ◽  
Vol 11 (3) ◽  
pp. 150-154
Author(s):  
Gary E. Price ◽  
Robert D. Michal ◽  
James M. O'Neil
Keyword(s):  
Error Rate

How Useful is the Power Law of Practice for Recognizing Practice in Concentration Tests?

2007 ◽  
Vol 23 (3) ◽  
pp. 157-165 ◽  
Author(s):  
Carmen Hagemeister
Keyword(s):  
Logistic Regression ◽  
Reaction Time ◽  
Power Law ◽  
Error Rate ◽  
Reaction Times ◽  
Practice Effect ◽  
Practice Effects ◽  
Rate Decrease ◽  
Small Practice

Abstract. When concentration tests are completed repeatedly, reaction time and error rate decrease considerably, but the underlying ability does not improve. In order to overcome this validity problem this study aimed to test if the practice effect between tests and within tests can be useful in determining whether persons have already completed this test. The power law of practice postulates that practice effects are greater in unpracticed than in practiced persons. Two experiments were carried out in which the participants completed the same tests at the beginning and at the end of two test sessions set about 3 days apart. In both experiments, the logistic regression could indeed classify persons according to previous practice through the practice effect between the tests at the beginning and at the end of the session, and, less well but still significantly, through the practice effect within the first test of the session. Further analyses showed that the practice effects correlated more highly with the initial performance than was to be expected for mathematical reasons; typically persons with long reaction times have larger practice effects. Thus, small practice effects alone do not allow one to conclude that a person has worked on the test before.

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