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相关概念视频

Typical Model Studies01:30

Typical Model Studies

344
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
344
Modeling and Similitude01:12

Modeling and Similitude

248
Scaled modeling is a fundamental technique in engineering, enabling the study of large and complex systems by creating smaller, manageable replicas that recreate critical characteristics of the original. In hydrology and civil infrastructure, for example, scaled models of dams help analyze water flow, turbulence, and pressure. This method allows for accurate predictions of real-world behavior within a controlled environment, significantly reducing the cost and time involved in full-scale...
248
Design Example: Creating a Hydraulic Model of a Dam Spillway01:21

Design Example: Creating a Hydraulic Model of a Dam Spillway

135
Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.
135
Deformation of Member under Multiple Loadings01:11

Deformation of Member under Multiple Loadings

159
When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
In the case of a member with a variable cross-section, the strain is not constant but depends on the position. The deformation of an...
159
Bending of Members Made of Several Materials01:08

Bending of Members Made of Several Materials

143
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
143
Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving01:29

Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving

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Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
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使用DEM展示了两种混合器类型之间的可扩展性.

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此摘要是机器生成的。

离散元件方法 (DEM) 模拟优化了制药粉末的混合和滑剂分散. 这种方法准确地预测了平板电脑的抗拉强度,提高了制造效率和产品的一致性.

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科学领域:

  • 制药制造业 制药制造业 制药制造业
  • 粉末技术技术 粉末技术
  • 计算流体动力学的流体动力学.

背景情况:

  • 粉末混合对于制药品质量至关重要,它会影响平板电脑的性能,如抗拉强度.
  • 优化混合过程对于一致的药物制造至关重要.
  • 了解混合过程中的粒子行为是过程控制的关键.

研究的目的:

  • 使用离散元件方法 (DEM) 模拟来研究粉末混合和滑剂分散.
  • 开发基于混合参数的平板电脑拉伸强度的预测模型.
  • 探索不同混合器设计之间的混合过程的可扩展性.

主要方法:

  • 利用离散元件方法 (DEM) 模拟,在5升迷你批量和2升Turbula混合机中进行混合分析.
  • 使用小规模粉末特征测试校准的DEM参数.
  • 开发了一个平板电脑拉伸强度的预测模型,其中包含滑能量.

主要成果:

  • DEM模拟准确地反映了颗粒的行为,并允许混合器尺寸之间进行缩放.
  • 预测模型成功地将混合参数 (速度,持续时间,填充水平) 与平板电脑的抗拉强度相关联.
  • 确定了最佳的工艺条件,以改善滑剂分散和混合均性.

结论:

  • DEM是理解和优化制药粉末混合的强大工具.
  • 开发的模型提供了一种方法来预测平板电脑的抗拉强度,帮助工艺设计.
  • 这些发现支持开发半连续制造工艺,以提高效率和一致性.