Oct 12, 2025 · 7 min read · 🧱 What is Software Development Lifecycle (SDLC)? The Software Development Life Cycle (SDLC) is a structured process used by development teams to design, develop, test, and deploy software efficiently. It defines the stages from idea → deployment → m...
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Jun 10, 2025 · 4 min read · Designing the right API strategy for shared business capabilities is crucial when modernizing integration architectures. In this new “Integration Architecture Design Decisions” series, we unpack real-life architecture challenges. Each article tackles...
Join discussionJun 6, 2025 · 3 min read · Key Similarities, Differences, and When to Use Each in the Enterprise In conversations about modern architecture, Service-Oriented Architecture (SOA) and Microservices often come up together. While they share some foundational ideas, they’re not the...
Join discussionApr 26, 2025 · 4 min read · Introduction In today's fast-paced digital era, organizations across all sectors are under increasing pressure to meet evolving customer expectations, optimize operations, and deliver value with greater agility. At the core of this transformation is ...
MMahmoud commentedApr 11, 2025 · 1 min read · 單一決策樹 $$分割M-1次，得到M個節點R_m，反應變數可為有K個水準的分類變數或連續變數$$節點不純度(Impurity) Classification error rate $$\begin{aligned} E_m &= \frac{\text{# misclassified}}{\text{# samples in } R_m} \\ &= 1 - \max_k(\hat{p_{mk}}) \\ \text{(因為最大機率對應的 } &k \text{ 就是 } \hat{Y}_m\t...
Join discussionApr 4, 2025 · 2 min read · 弱平穩(Weak Stationary) $$\begin{aligned} \operatorname{E}(y_t)&=C \\ \operatorname{Cov}(y_t,y_s)&=R(t,s) \\ \operatorname{Var}(y_t)&=\operatorname{Cov}(y_t,y_t)=\sigma_y^2 \\\\ \rho_k&=\operatorname{Corr}(y_t,y_{t-k})=\frac{\operatorname{Cov}(y_t,y_{t-...
Join discussionMar 29, 2025 · 3 min read · 模型假設 Linear Exponential Family $$f(y;\mu,\theta)=\operatorname{exp}(\frac{y\theta-b(\theta)}{\phi}-S(y,\phi))$$$$\begin{array}{c|c|c|c|c} & \text{Bin}(n,\pi) \text{ (known } n\text{)} & N(\mu,\sigma^2) & \text{Poisson}(\lambda) & \text{Exp}(\lambda) ...
Join discussionMar 15, 2025 · 3 min read · 符號定義 $$\begin{aligned} {S_{xx}} &:=\sum(x_i-\bar{x})^2 \\ {S_{xy}} &:=\sum(x_i-\bar{x})(y_i-\bar{y}) \\ \operatorname{SST} &=\operatorname{TSS}=\sum\limits_{i=1}^n (y_i-\bar{y})^2 \\ \operatorname{SSR} &=\operatorname{RegSS}=\sum\limits_{i=1}^n (\hat...
Join discussionMar 20, 2024 · 2 min read · Service-Oriented Architecture (SOA) has emerged as a prominent architectural style in software development. It breaks down applications into independent, reusable components called services. These services communicate with each other over a network u...
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Apr 10, 2023 · 1 min read · *SOA is an architectural approach where we expose ‘service’ in a coarse-grained manner whereas ESB is a technical implementation that aids in delivering an SOA. *SOA brings cost-effective, reusable and low lead-time solutions to an organization where...
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