PPT Design Requirements: Academic Research Background Page (16:9, White Background | Dual Concentric Circle Comparison Layout) Core Visual Concept: Employ a dual, side-by-side concentric circle structure to visually represent the paradigm shift and upgrade from "traditional chemical methods" to "innovative biological methods." Through the layers of the circles, logically present the core characteristics, problems, or advantages of each method from the inside out, ultimately pointing to their industrial connections to form a complete technical profile. --- Page Layout and Design Tips: 1. Overall Structure: * Title: Placed at the top. Suggested title: "Paradigm Evolution of Rare Earth Leaching Technology: From Chemical Dissolution to Biological Recognition." * Main Body: Place two large concentric circle graphics side by side in the center of the page. The left circle represents "traditional chemical methods," and the right circle represents "the biological method of this project." * Connection and Guidance: Between the two large circles, add a prominent, left-to-right bold arrow (or a technological streamline bridge illustration), labeled above: "Demand-Oriented · Technological Innovation · Industrial Upgrading." * Bottom Guidance: At the bottom of the page, a line of guiding text can be added in the center to introduce the three research contents on the next page, such as: "Deconstructing the core mechanism of biological enhancement, moving towards precise recycling," or directly list icon previews of the three questions. 2. "Traditional Chemical Method" Concentric Circle (Left Side) Design: * Color Scheme: The main color scheme uses dark, warning colors (such as dark gray, dark red, brown) to convey a sense of pollution, energy consumption, and roughness. * Structure: * Innermost Core (Center Circle): Label "Chemical Leaching Method," and the background can use blurred chemical apparatus or molecular structure diagrams. * Middle Ring (Problem Layer): Surrounding the core, divided into 4 sectors or equidistant nodes, use icons + keywords to visually display its inherent defects: * 🔄 Full-Area Leaching (with a schematic diagram of full-range coverage) * ⚠️ Ammonia Nitrogen Pollution (with sewage icon or warning sign) * ⚡ High Energy Consumption (with lightning or rising line graph icon) * 🧪 Complex Ion Phase (with messy intertwined lines or molecular formula) * Outermost Ring (Industrial Connection Layer): The upper part of the ring is labeled "Industrial Connection," and the lower part shows the subsequent processes it leads to: "Complex Impurity Removal → Liquid-Liquid Extraction" (can be equipped with a simple multi-step arrow flowchart). The entire outer ring can visually present a feeling of "heavy" and "cumbersome." 3. "Biological Method of This Project" Concentric Circle (Right Side) Design: * Color Scheme: The main color scheme uses fresh,
**PPT Design Requirements: Academic Research Background Page...