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There is little literature to introduce the approaches for the feature selection, which plays an important role in the customer churn prediction. In addition, due to the imbalanced data classification problem occurring, most of the traditional approaches ineffectively select the important features for the churn prediction. This paper proposes a new filter feature selection approach for customer churn...
We report, for the first time, the reliability issues of tunneling field-effect transistors (TFETs) by experiments. We observed that the overall reliability performance of n-TFETs is very different from those of the conventional n-MOSFET. The degradation of n-TFETs under positive bias temperature instability (PBTI) stress is very large compared with the negligible degradation for the conventional...
The structure of amorphous compound semiconductor has been constructed successfully by ldquocontinuous random networksrdquo (CRN). Based on the first-principles calculations, the effects of different local disorder on density of states are studied in detail. The results show that the wrong bonds mainly have effect on the deeper energy band and introduce new electron states, and the dangling bonds...
By using first-principle energy calculations, we found that the coupling structures between As in-suit substitute impurities and Hg vacancy in HgCdTe having p-type characteristics no matter As in-suit substitute Hg or Te atom. However, the characteristics of the coupling structures between As in-suit interstitial atom and mercury vacancy depend on the relative site of the interstitial atom.
The objective of this work is to study the functional hand strength for ADL rehabilitation tasks based on EMG signals and gripping/pinch force measurement via multivariate data analysis (MVA): Principal Components Analysis (PCA) and Projections to Latent Structures (PLS). The study allows us to identify weak muscles of patients with motor weakness, such as spinal cord injury (SCI) and post-stroke...
Firstly realizable k-epsilon turbulent model (RKE) and Reynolds stress turbulent model (RSM) were tested against a swirl-cup flow field and the prediction results were compared with the experimental data. Generally, the max error of RKE model and RSM model is about 5% and 3% separately. Thus the RKE model was used in the simulation of a single swirl-cup gas turbine combustor (GTC) and a multi-injection...
Recently, Wheeler cap method was extended to measure wideband antennas. This paper presents an investigation on the effects of the loss of wheeler cap on antenna efficiency measurement results. Two caps/cavities (one large and one small) are employed for this study and numerical simulation is also conducted to aid the analysis. Both the experimental and numerical results show the loss due to the imperfection...
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