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主講人:Professor Xinfu Chen, University of Pittsburgh

  目:Dynamics of Spike

   期:108312日(星期二)

  間:下午16:10

  點:科學館S433

 摘要Abstract:

This talk addresses the dynamics of a spike in a chemotaxis model. The motion of the spike is described by a free boundary problem. Also explained are three stages of evolution of spikes: generation, propagation, and final settlement.

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主講人:Chang Yun Fah 張運華助理教授

(Department of Mathematical and Actuarial Sciences, LKC Faculty of                  
  Engineering and Science, Universiti Tunku Abdul Rahman, Malaysia.)

題  目:基於X-Y圖分解和二維無重複綫性函數關係模型的高效在線手寫漢字識別系統

Efficient Online Handwritten Chinese Character Recognition System Using X-Y Graphs Decomposition and 2-D Unreplicated Linear Functional Relationship Model

 

日  期:107年12月4日(星期二)

時  間:下午13:30開始

地  點:科學館S433室

摘要Abstract:

This talk presents novel feature extraction and classification methods for online handwritten Chinese character recognition (HCCR). The X-graph and Y-graph transformation is proposed for deriving a feature, which shows useful properties such as invariance to different writing styles. Central to the proposed method is the idea of capturing the geometrical and topological information from the trajectory of the handwritten character using the X-graph and the Y-graph. For feature size reduction, the Haar wavelet transformation was applied on the graphs. For classification, the coefficient of determination (R2 p) from the two-dimensional unreplicated linear functional relationship model is proposed as a similarity measure. The proposed methods show strong discrimination power when handling problems related to size, position and slant variation, stroke shape deformation, close resemblance of characters, and non-normalization. The proposed recognition system is applied to a database with 3000 frequently used Chinese characters, yielding a high recognition rate of 97.4% with reduced processing time of 75.31%, 73.05%, 58.27% and 40.69% when compared with recognition systems using the city block distance with deviation (CBDD), the minimum distance (MD), the compound Mahalanobis function (CMF) and the modified quadratic discriminant function (MQDF), respectively. High precision rates were also achieved.

This research was financially supported by E-Science Grant of the Ministry of Science, Technology and Innovation of Malaysia. This talk is based on the join work with Lee Jia Chii, Omar Mohd Rijal and Syed Abdul Rahman Syed Abu Bakar.

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主講人:Professor. Man-Ho Ling

(Department of Mathematics and Information Technology, The Education University of Hong Kong)

 目:Optimal simple SSALT plan for one-shot devices under exponential distributions

  期:1071023日(星期二)

   間:下午15:30開始

  點:科學館S433

 摘要Abstract:

Step-stress accelerated life tests (SSALTs) wherein devices are subject to elevated stress levels to induce rapid failures are more efficient and less costly than constant-stress accelerated life tests to collect lifetime information of the devices. In this talk, optimal simple SSALT plan for one-shot devices under exponential distributions is considered.
     The design minimizes the asymptotic variance of the maximum likelihood estimate of the mean lifetime under normal operating conditions in terms of three decision variables, including stress levels, inspection times, and sample allocation. An expectation-maximization algorithm will be presented to find the
maximum likelihood estimates of the model parameters and the mean lifetime. A procedure will then be presented to determine the decision variables when a range of stress levels, the experimental termination time and normal operating conditions are given.


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主講人:楊東城處長

 題  目:運用雲端 CRM 數據分析,挖掘客戶寶藏

 日  期:107年11月27日(星期二)

 時  間:下午14:10開始

地  點:科學館S433室

 摘要Abstract:

叡揚資訊公司簡介

客戶關係管理CRM(Customer Relationship Management)系統的應用

運用數據分析創造價值

雲端CRM系統的後續發展


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主講人:Professor N. Balakrishnan

        (Distinguished University, McMaster University

         Hamilton, Ontario,Canada)

 目:Exact Linear Likelihood Inference for Laplace Distribution

  期:1071023日(星期二)

  間:下午13:30開始

  點:科學館S433

 

摘要Abstract:

In this talk, I will discuss exact maximum likelihood estimators for the location and scale parameters of the Laplace distribution based on complete and censored data (Type-I and Type-II).  Then, I will develop the exact distribution theory for these MLEs using which exact linear likelihood inference will be developed for the life characteristics of Laplace distribution under censored data. Finally, some examples will be presented to illustrate the theoretical results established.


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107學年度數學系專業證照獎學金得獎名單 發佈時間: 2019-03-21, 週四
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108/3/12 Professor Xinfu Chen(University of Pittsburgh)-Dynamics of Spike 發佈時間: 2019-03-04, 週一
主講人:Professor Xinfu Chen, University of Pittsburgh 題  目:Dynamics of Spike  日  期:108年3月12日(星期二)...
107/11/27 楊東城處長(叡揚資訊公司)-運用雲端 CRM 數據分析,挖掘客戶寶藏。 發佈時間: 2018-11-20, 週二
主講人:楊東城處長  題  目:運用雲端 CRM 數據分析,挖掘客戶寶藏  日 ...
107/10/23 Professor Man-Ho Ling(Department of Mathematics and Information Technology, The Education University of Hong Kong)-Optimal simple SSALT plan for one-shot devices under exponential distributions 發佈時間: 2018-10-12, 週五
主講人:Professor. Man-Ho Ling (Department of Mathematics and Information Technology, The Education University of Hong Kong) 題...
107/10/23 Professor N. Balakrishnan(Distinguished University, McMaster University Hamilton, Ontario,Canada)-Exact Linear Likelihood Inference for Laplace Distribution 發佈時間: 2018-10-12, 週五
主講人:Professor N. Balakrishnan         (Distinguished University, McMaster University...