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A weak signal detection technology based on stochastic resonance system is proposed in this paper. The principle of stochastic resonance is analyzed. Also a system based on Duffing equation is introduced. Then, a model is built using simulink soft ware. Finally, simulation is done using matlab software. Simulation results show that this technology can reach(More)
BACKGROUND Impaired left ventricular (LV) diastolic function is a common pathophysiological feature of patients with hypertrophic cardiomyopathy (HCM). The noninvasive evaluation of diastolic function in these patients remains a challenge. Speckle tracking echocardiography (STE) provides direct information on intrinsic myocardial function and may improve(More)
OBJECTIVES Postsystolic shortening (PSS) has been proposed as a marker of myocardial dysfunction. Percutaneous transluminal septal myocardial ablation (PTSMA) is an alternative therapy for patients with hypertrophic obstructive cardiomyopathy (HOCM) that results in sustained improvements in atrial structure and function. We investigated the effects of PTSMA(More)
This paper proposes a network communication system based on OpenSSL command line tool. Root certificate CA is making and, based on its signature, server certificate and client certificate and their private key files are done. Also, the SSL communication module is implemented. A SSL channel between the server and the client is set up by calling the API(More)
BACKGROUND Percutaneous transluminal septal myocardial ablation (PTSMA) is an alternative therapy for patients with hypertrophic obstructive cardiomyopathy (HOCM) that results in sustained improvement in the global diastolic dysfunction. Regional diastolic abnormalities and diastolic asynchrony are very common and closely related to global diastolic(More)
OBJECTIVES Intra- and interatrial electromechanical delay (AEMD) can be used to evaluate the development of atrial fibrillation (AF). Percutaneous transluminal septal myocardial ablation (PTSMA) is an alternative therapy for patients with hypertrophic obstructive cardiomyopathy (HOCM) that results in sustained improvements in atrial structure and function.(More)
In order to meet the signal request of radar, sonar and communication transmitter, a multi-channel wideband and radio frequency signal generator based parallel direct digital frequency synthesis and high update rate digital to analog converter is proposed in this paper. The proposed parallel direct digital frequency synthesis design method improves the(More)
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