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A new synthetic route of 2‐nitrothiophenes was described through a tetra‐n‐butylammonium fluoride‐promoted or diisopropylethylamine‐promoted tandem Henry reaction and nucleophilic substitution of nitromethane with 3‐thiocyanatopropenals, which were conveniently prepared by the replacement reaction of 3‐chloropropenals with potassium thiocyanate under a mild acidic condition.
Epilepsy is a brain dysfunction disease, which is caused by brain neuron excessive discharge. The damage induced by seizure is irreversible, so it is necessary to propose a new method to prevent epileptic seizure and protect the brain. Therefore, the best way is to predict preictal state accurately and to give preventive treatment. In this paper, the calculation of the largest Lyapunov exponent based...
Structure visualization and identification for ultrasound (US) arthral structure images is essential in US-guided arthrosis operation and diagnosis for arthrosis disorder. US imaging can image arthrosis tissues and cartilaginous, but it often depicts the structure poorly, because of speckle, reverberation, shadowing feature and other artifacts. The enhancement of arthrosis structure visualization...
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