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相关概念视频

Geometric Mean01:15

Geometric Mean

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The mean is a measure of the central tendency of a data set. In some data sets, the data is inherently multiplicative, and the arithmetic mean is not useful. For example, the human population multiplies with time, and so does the credit amount of financial investment, as the interest compounds over successive time intervals.
In cases of multiplicative data, the geometric mean is used for statistical analysis. First, the product of all the elements is taken. Then, if there are n elements in the...
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Routes of Persuasion02:20

Routes of Persuasion

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Persuasion is the process of changing our attitude toward something based on some kind of communication. Much of the persuasion we experience comes from outside forces. How do people convince others to change their attitudes, beliefs, and behaviors? What communications do you receive that attempt to persuade you to change your attitudes, beliefs, and behaviors?
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Geometric Sequences01:30

Geometric Sequences

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In systems where values diminish by a constant proportion at each stage, the resulting sequence follows a geometric structure. Each new value in the sequence is obtained by applying a fixed multiplier to the preceding term. This regular, proportional decline type is often used to represent processes involving gradual loss, such as energy dissipation or reduction in amplitude over time.When analyzing the total effect of such a process across unlimited iterations, the series of values is referred...
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Dosage Interval and Administration Route: Determination Methods01:19

Dosage Interval and Administration Route: Determination Methods

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A medication’s effectiveness largely depends on its appropriate dosage and the route of administration. Dosage ensures that a sufficient drug concentration is maintained in the bloodstream to elicit the desired therapeutic effect without causing toxicity. The route of administration affects the drug's bioavailability, rate of absorption, and onset of action, which are crucial for achieving optimal therapeutic outcomes. Drug dosage calculations are critical to tailoring therapy to...
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Routes of Drug Administration: Parenteral01:25

Routes of Drug Administration: Parenteral

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The administration of drugs via parenteral routes allows for direct drug introduction into the systemic circulation, resulting in high bioavailability because the medication bypasses the harsh conditions of the gastrointestinal tract and hepatic metabolism.
The intravenous route (IV) of drug administration can be further categorized into two types. The bolus injection administers the entire dose rapidly, while an intravenous infusion slowly delivers smaller doses steadily.
The IV route is often...
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Routes of Drug Administration: Overview01:22

Routes of Drug Administration: Overview

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Drug administration involves delivering drugs to the body through various routes, such as enteral, parenteral, and topical.
Enteral administration refers to drugs absorbed through the gastrointestinal tract. They can be swallowed (perorally), placed under the tongue (sublingually), or on the inner lining of the cheeks (buccally). Perorally administered drugs take time to be absorbed and have a slower onset of action. The rectal route is another form of enteral administration, which allows for...
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相关实验视频

Updated: Jan 31, 2026

Author Spotlight: Real-Time Imaging of Bonding in 3D-Printed Layers
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Author Spotlight: Real-Time Imaging of Bonding in 3D-Printed Layers

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3D LineExplore:用于多层PCB几何路由的3D线路探索方法.

Niannian Sun1, Jixin Zhang2, Ning Xu3

  • 1School of Computer Science, Hubei University of Technology, Wuhan, 430068, China.

Scientific reports
|January 29, 2026
PubMed
概括

一种新的3D几何路由方法,3D LineExplore,增强了多层印刷电路板 (PCB) 的设计. 这种先进的方法提高了路由成功率和效率,克服了传统基于网格和2D方法的局限性.

关键词:
这是一个3D的3D.勘探点是指勘探地点.没有网格的无网格.启发式成本函数是一种启发式成本函数.雷达扫描扫描雷达扫描.

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A Method for Determination and Simulation of Permeability and Diffusion in a 3D Tissue Model in a Membrane Insert System for Multi-well Plates
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科学领域:

  • 电气工程 电气工程
  • 计算机科学 计算机科学
  • 计算几何学的计算几何学

背景情况:

  • 印刷电路板 (PCB) 的路由复杂性正在随着先进的电子产品而增加.
  • 当前的多层PCB路由方法 (例如A*) 面临网格分辨率限制和高计算成本.
  • 现有的没有网格的方法通常仅限于2D,不适合多层设计.

研究的目的:

  • 为多层PCB引入一种基于3D线路探索的新型几何路由方法.
  • 克服电网分辨率限制,提高路由效率.
  • 为复杂的多层路由场景提供本机支持.

主要方法:

  • 一个以"雷达"为灵感的扫描算法根据设计规则和障碍物确定最佳的探索点.
  • 一个障碍回避启发式路径优化算法计划有效的路径,包括层过渡.
  • 一个多针网修复和电线形状优化模块确保了路由能力和路径流性.

主要成果:

  • 拟议的3D LineExplore方法在开源PCB数据集上取得了超过98%的路由成功.
  • 与最先进的方法相比,证明了更短的线长和更高的效率.
  • 它的性能优于商业工具,如FreeRouting,ELECTRA,DeepPCB和优化3D-A*.

结论:

  • 3D LineExplore 方法有效地解决了多层 PCB 路由方面的挑战.
  • 为现有的基于网格的和2D无网格的方法提供了优质的替代方案.
  • 在复杂的PCB设计中显著提高路由成功,效率和路径质量.