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Tiaozi Study notes: Two-step clustering algorithm (Twostep Cluster algorithm)-Improved birch algorithm

are read one by one, and the data points of clustered dense regions are formed while the CF tree is generated, and many small sub-clusters (sub-cluster) are created.2) cluster (clustering) stage. With the result of the pre-clustering phase-the sub-cluster as the object, using the condensation method (Agglomerative hierarchical Clustering method), the sub-clusters are merged one by one until the desired number of clusters.The key technology of two-step clustering algorithm:Figure 1: Key technolo

CS231N (c) Error reverse propagation

the neuron is implemented as follows:w = [2,-3,-3] # 假设一些随机数据和权重x = [-1, -2]# 前向传播dot = w[0]*x[0] + w[1]*x[1] + w[2]f = 1.0 / (1 + math.exp(-dot)) # sigmoid函数# 对神经元反向传播ddot = (1 - f) * f # 点积变量的梯度, 使用sigmoid函数求导dx = [w[0] * ddot, w[1] * ddot] # 回传到xdw = [x[0] * ddot, x[1] * ddot

Target Motion Model

model is too idealistic or the target is almost impossible to be stationary, the usual target tracking problem does not take into account the static model described above. However, in a soccer robot game, the target is still in a very high probability, such as the gatekeeper robot in most cases is static, and other play defensive or offensive role of the robot to reach its defensive position or the passing point will also stop to wait for further development of the situation. In these cases, on

Symbolic representation of latex mathematical formulae

Introduction Since Csdn's Markdown editor can easily support the formula representation of LATEX \latex.So, today, let's count the symbolic representation of the LATEX \latex mathematical formula so that we can look it up later. 1. Emphasis mode A^aˇ\hat{a}\check{a}a´a ' \acute{a}\grave{a}a¯a⃗\bar{a}\vec{a}a˙a¨\dot{a}\ddot{a}a˘a~\breve{a}\tilde{a} \begin{ Equation} \begin{array}{l} \hat{a} \text{\hat{a}} \acute{a} \text{\acute{a}} \bar{a} \text{

Markdown Adding Latex Math formulas

+\overbrace{b+\dots+b}^{m\mbox{\tiny 个}}}_{20\mbox{\scriptsize 个}}$ display as: \ (\underbrace{a+\overbrace{b+\dots+b}^{m\mbox{\tiny a}}}_{20\mbox{\scriptsize}}\) Mathematical Stress SymbolsTake a for example, if the letter I or J is accented, the letter i,y should be replaced with \imath, \jmath$$\hat{a}\check{a}\breve{a}\tilde{a}\bar{a}\vec{a}\acute{a}\grave{a}\mathring{a}\dot{a}\ddot{a}$$The results shown are:\[\hat{a}\check{a}\brev

Blas library Learning

Symmetric packed He Hermitian HB Hermitian band HP Hermitian packed Tr Triangular TB Triangular band TP Triangular packed Each operation is defined for four precisions, S Single real D Double real C Single Complex Z Double Complex Thus, for example, the name sgemm stands for "Single-precision general matrix-matrix multiply" and zgemm stands fo

Numerical Solution of partial differential equations-learning Summary

} (\ Omega )? \) Space \ (\ Omega _ {open} \ subset \ mathbb {r} ^ {d }? \), \ (D \ Ge 1? \), And \ (\ Omega? \) YesLebesgueMeasurable.\ [\ Begin {Align *} \ mit L ^ {p} : = \ left \ {v \, \, \ big | \ int _ {\ Omega }\, \ left | V (x) \ right | \, ^ p \, DX \ Leq \ infty \ right \}, \, 1 \ Leq p \, Its norm is\ [\ Begin {Align *} | v | _ {\ mit L ^ {P }}:=\ left (\ int _ {\ Omega }\, \ left | V (x) \ right | \, ^ p \, DX \ right) ^ {1/p}, \, 1 \ Leq p \, \ (\ Mit L ^ {2} (\ Omega) \) space is

Numerical Solution of partial differential equations-learning Summary

. \ [\ Begin {Align *} \ mit L ^ {p} : = \ left \ {v \, \, \ big | \ int _ {\ Omega }\, \ left | V (x) \ right | \, ^ p \, DX \ Leq \ infin \ right \}, \, 1 \ Leq p \, ? Its norm is\ [\ Begin {Align *} | v | _ {\ mit L ^ {P }}:=\ left (\ int _ {\ Omega }\, \ left | V (x) \ right | \, ^ p \, DX \ right) ^ {1/p}, \, 1 \ Leq p \, \ (\ Mit L ^ {2} (\ Omega) \) space is actually a Hilbert space assigned to the right inner product, $ (W, V){\ Mit L ^ {2} (\ Omega)} = \ int{\ Omega}, w (x

Two-hour Challenge Analysis Mechanics (updated)

displacement and does not require time. the "Time-variant"δ function is 0 on T and the other times the same as D. "Virtual" \ (δw=\textbf{f}\cdotδ\textbf{r}\) the "ideal constraint" internal and external binding of the virtual force is zero. \ (\sum\limits_i\textbf{f}_{ni}\cdotδ\textbf{r}_i=0\) where the binding is recorded as FN Common Ideal constraints: 1. Particles moving along smooth surfaces 2. Two particles are connected by a rigid light rod 3. Two rigid bodies with smooth table contact M

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