#part_17post_5 📌📌يافتن تفكيك كننده غير خطي با استفاده از شبكه عصبي SVM
✅ جهت انجام اين كار بايد يك نگاشت غير خطي انجام دهيم.
✅نگاشت يعني به عنوان مثال يك نقطه اي را از فضايي خطي مانند x به فضايي غيرخطي مانند z انتقال دهيم.
⭕️جهت انجام نگاشت از توابع كرنل استفاده ميكنيم. كه توابع كرنل انواع متفاوتي دارند: ١-چند جمله اي ٢-تابع كرنل MLP ٣-گوسي
✅يعني در حالت خطي، تفكيك كننده ما به شكل زير بود: y=sign(w’x+b) —-> y=sign[zigma (alpha(i)*y(i)*x’(i)*x) +b]
اما در حالت غيرخطي داريم: y=sign[zigma alpha(i)*y(i)*kernel(x(i),x)+b] —————————————— جهت آموزش به زبان ساده متلب به آيدي زير مراجعه كنيد👇 🆔@matlab_guidance
#part_17post_5 📌📌يافتن تفكيك كننده غير خطي با استفاده از شبكه عصبي SVM
✅ جهت انجام اين كار بايد يك نگاشت غير خطي انجام دهيم.
✅نگاشت يعني به عنوان مثال يك نقطه اي را از فضايي خطي مانند x به فضايي غيرخطي مانند z انتقال دهيم.
⭕️جهت انجام نگاشت از توابع كرنل استفاده ميكنيم. كه توابع كرنل انواع متفاوتي دارند: ١-چند جمله اي ٢-تابع كرنل MLP ٣-گوسي
✅يعني در حالت خطي، تفكيك كننده ما به شكل زير بود: y=sign(w’x+b) —-> y=sign[zigma (alpha(i)*y(i)*x’(i)*x) +b]
اما در حالت غيرخطي داريم: y=sign[zigma alpha(i)*y(i)*kernel(x(i),x)+b] —————————————— جهت آموزش به زبان ساده متلب به آيدي زير مراجعه كنيد👇 🆔@matlab_guidance
BY MATLAB_guidance
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Spiking bond yields driving sharp losses in tech stocks
A spike in interest rates since the start of the year has accelerated a rotation out of high-growth technology stocks and into value stocks poised to benefit from a reopening of the economy. The Nasdaq has fallen more than 10% over the past month as the Dow has soared to record highs, with a spike in the 10-year US Treasury yield acting as the main catalyst. It recently surged to a cycle high of more than 1.60% after starting the year below 1%. But according to Jim Paulsen, the Leuthold Group's chief investment strategist, rising interest rates do not represent a long-term threat to the stock market. Paulsen expects the 10-year yield to cross 2% by the end of the year.
A spike in interest rates and its impact on the stock market depends on the economic backdrop, according to Paulsen. Rising interest rates amid a strengthening economy "may prove no challenge at all for stocks," Paulsen said.
