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相关概念视频

Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

11.4K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
11.4K
Titration Calculations: Strong Acid - Strong Base02:28

Titration Calculations: Strong Acid - Strong Base

33.8K
Calculating pH for Titration Solutions: Strong Acid/Strong Base
A titration is carried out for 25.00 mL of 0.100 M HCl (strong acid) with 0.100 M of a strong base NaOH. The pH at different volumes of added base solution can be calculated as follows:
(a) Titrant volume = 0 mL. The solution pH is due to the acid ionization of HCl. Because this is a strong acid, the ionization is complete and the hydronium ion molarity is 0.100 M. The pH of the solution is then:
33.8K
Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

26.6K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
26.6K
Strong Acid and Base Solutions03:22

Strong Acid and Base Solutions

35.3K
A strong acid is a compound that dissociates completely in an aqueous solution and produces a concentration of hydronium ions equal to the initial concentration of acid. For example, 0.20 M hydrobromic acid will dissociate completely in water and produces 0.20 M of hydronium ions and 0.20 M of bromide ions.
35.3K
Titration of a Strong Acid with a Strong Base01:23

Titration of a Strong Acid with a Strong Base

10.2K
During the titration of a strong acid with a strong base, pH calculations are primarily based on the concentration of residual hydronium or hydroxide ions. Initially, a strong acid like hydrochloric acid fully dissociates, creating hydronium and chloride ions, resulting in a low pH. The addition of a strong base like sodium hydroxide alters the concentration of hydronium ions by neutralizing them. As more base is added, the pH gradually increases. At the equivalence point, all hydronium ions...
10.2K
Bewley Lattice Diagram01:12

Bewley Lattice Diagram

1.5K
The Bewley lattice diagram, developed by L. V. Bewley, effectively organizes the reflections occurring during transmission-line transients. It visually represents how voltage waves propagate and reflect within a transmission line, making it easier to understand the complex interactions that occur.
1.5K

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相关实验视频

Updated: Jan 23, 2026

Transaxillary First Rib Resection for Treatment of the Thoracic Outlet Syndrome
06:57

Transaxillary First Rib Resection for Treatment of the Thoracic Outlet Syndrome

Published on: September 13, 2020

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肋骨增强超轻型和超强型外网格.

Winston Wai Shing Ma1, Lei Zhang2, Junhao Ding3

  • 1Department of Mechanical Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|January 22, 2026
PubMed
概括

研究人员开发了新的肋状外格子,以提高超轻材料的强度. 这种设计提高了承载能力,并防止在轻量级应用中出现曲故障.

关键词:
耐曲的设计设计.曲率的方向 曲率的方向有条纹的贝 格子 格子三重周期性的最小表面.超轻型和超强型网格.

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Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting
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Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting

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A Surgical Procedure for Resecting the Mouse Rib: A Model for Large-Scale Long Bone Repair
08:42

A Surgical Procedure for Resecting the Mouse Rib: A Model for Large-Scale Long Bone Repair

Published on: January 21, 2015

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相关实验视频

Last Updated: Jan 23, 2026

Transaxillary First Rib Resection for Treatment of the Thoracic Outlet Syndrome
06:57

Transaxillary First Rib Resection for Treatment of the Thoracic Outlet Syndrome

Published on: September 13, 2020

4.0K
Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting
08:32

Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting

Published on: May 14, 2016

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A Surgical Procedure for Resecting the Mouse Rib: A Model for Large-Scale Long Bone Repair
08:42

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科学领域:

  • 材料科学 材料科学 材料科学
  • 机械工程 机械工程
  • 增材制造 增材制造 增材制造

背景情况:

  • 贝格为轻量化应用提供独特的几何和机械性能.
  • 格的低相对密度 (RDs) 会导致由于屈服到曲的故障模式导致强度降低.
  • 优化超轻型和超强型外格子是一个挑战.

研究的目的:

  • 提出一种新的肋骨增强外格子设计,称为肋骨外格子.
  • 为了增强超轻的三重周期性最小表面 (TPMS) 格的强度.
  • 为了研究肋骨位置对机械性能的影响.

主要方法:

  • 揭示TPMS薄外格子中曲率和应力方向之间的内在关系.
  • 沿着代表性曲率方向编排两组肋骨:异位线 (LOA) 和主要曲率线 (LOC).
  • 物理实现和数值模拟以验证设计.

主要成果:

  • 将沿着LOA和LOC穿过外点的肋骨结合在一起,增强了112.3%的强度,RD约为1.28%.
  • 肋骨重新分配压力,加强薄的外,并抑制曲变形,特别是在带区域.
  • 连续的肋骨提供额外的负载路径,提高承载效率.

结论:

  • 肋骨增强外网格为增强超轻TPMS结构的强度提供了一个实用的设计策略.
  • 拟议的方法有效地解决了shell格子中的微架构曲故障.
  • 这种进步有助于开发更强,更高效的轻质材料.