diff --git a/source/_posts/AI.md b/source/_posts/AI.md
index 3d414fe7..24f175a6 100644
--- a/source/_posts/AI.md
+++ b/source/_posts/AI.md
@@ -395,4 +395,25 @@ Position-wise FFN (Similar to multi  convolution kernels in CNN, shared paramete
 
 #### Positional Encoding
 
-![1714986050538](../images/AI/1714986050538.png)
\ No newline at end of file
+![1714986050538](../images/AI/1714986050538.png)
+
+## Reasoning
+
+Reasoning (Probabilistic) = Modeling + Inference
+
+Modeling:
+* Bayesian Networks
+* Markov random fields
+
+Inference:
+* Elimination methods (变量消除法)
+* Latent variable models (因变量模型)
+* Variational methods (变分方法)
+* Sampling methods (采样方法) - 难学！
+
+### Bayesian Network
+
+$$
+p(x_1,...,x_K)=p(x_K|x_1,...,x_{K-1})\cdots p(x_2|x_1)p(x_1)
+$$
+
diff --git a/source/_posts/Antenna.md b/source/_posts/Antenna.md
index e4cf351f..acf32e1a 100644
--- a/source/_posts/Antenna.md
+++ b/source/_posts/Antenna.md
@@ -608,7 +608,7 @@ Resistance $R_r$ too small!
 
 ![1715324769403](../images/Antenna/1715324769403.png)
 
-
+![1715328812089](../images/Antenna/1715328812089.png)
 
 ### Modes of Loop antennas