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相关概念视频

Manufacture of Concrete Masonry Units01:27

Manufacture of Concrete Masonry Units

88
The process of manufacturing concrete masonry units begins by mixing stiff concrete composed of Portland cement, aggregates, and water. This mixture is then poured into metal molds. To ensure the concrete settles uniformly and to avoid separation of its components, the mixture in the molds is subjected to vibration. Shortly after, the still-wet blocks are removed from the molds and placed on racks.
These wet blocks are then transported for curing, which can occur in one of two environments: a...
88
Design Example: Dimensioning of Concrete Masonry Construction01:13

Design Example: Dimensioning of Concrete Masonry Construction

92
For the construction of a storeroom using concrete masonry units, it's essential to align the dimensions of the structure with the actual sizes of the blocks and the intended mortar joints. On the site in question, there's a stockpile of concrete masonry blocks with a nominal size of eight by eight by sixteen inches, which are to be used in the construction of the storeroom.
The site engineer has laid out a plan for the storeroom with external dimensions of twelve feet in length and...
92
Production of Formed Elements01:34

Production of Formed Elements

1.3K
Hemangioblasts are multipotent stem cells originating from the mesoderm. They give rise to hematopoietic stem cells (HSCs), which undergo hematopoiesis to produce all the formed elements of blood. This process is regulated by a complex network of hematopoietic growth factors, including transcription factors, growth factors, and cytokines. These factors stimulate the HSCs to divide and differentiate, though some HSCs remain undifferentiated to maintain a self-renewing pool.
Most HSCs commit to...
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Steel Manufacturing01:26

Steel Manufacturing

390
Steel manufacturing is a multi-stage process that begins by smelting iron ore into cast iron in a blast furnace. This initial stage involves layering iron ore with coke, a type of fuel, and crushed limestone within the furnace. The coke is ignited with a high volume of air, leading to the creation of carbon monoxide, which acts to reduce the iron ore to pure iron.
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
390
Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

76
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
76
Concrete01:20

Concrete

320
Concrete is a vital construction material extensively used worldwide, primarily valued for its strength, durability, and versatility, which it provides for various structural designs. Concrete generally comprises ingredients like Portland cement, coarse gravel, fine sand, and water. Concrete can be mixed by simple hand methods or industrially at computer-controlled plants. The mixture consists of aggregates and a paste made from water and Portland cement. This paste coats the aggregates and,...
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相关实验视频

Updated: Jun 16, 2025

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

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Published on: May 14, 2016

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具体化 OBO 造厂内可实现的计划规格.

William D Duncan1, Matthew Diller2, Damion Dooley3

  • 1University of Florida, Gainesville, FL, USA. wdduncan@gmail.com.

Journal of biomedical semantics
|August 19, 2024
PubMed
概括

在本体学中表示计划执行的RC账户模式对于失败的计划是不够的. 建议使用"prescribed by"或纳入计划创建的新方法来更好地表示.

关键词:
共同的核心实体学.计划失败的计划失败的计划信息工件的本体学信息工件的本体学.这里是OBO造厂.存在论 (Ontology) 是一种存在论.生物医学研究的本体学.计划规格规格 计划规格规格

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相关实验视频

Last Updated: Jun 16, 2025

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08:32

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Published on: May 14, 2016

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科学领域:

  • 本体论的发展发展 本体论的发展
  • 生物信息学是一种生物信息学.
  • 科学建模的科学建模

背景情况:

  • 开放生物和生物医学本体学 (OBO) 造厂使用RC账户模式来表示计划执行.
  • 这种模式将计划规范与参与其实现的实体和流程联系起来.
  • 之前没有评估RC账户模式的充分性.

研究的目的:

  • 评估RC账户模式对表现计划执行的充分性.
  • 识别RC账户模式的局限性,特别是对于失败的计划.
  • 提出解决方案,以改善在本体学中的计划执行的表示.

主要方法:

  • 分析RC账户模式对计划执行的表现.
  • 确定风险投资账户模式不足的场景,例如失败的计划.
  • 开发替代代表策略. 开发替代代表策略.

主要成果:

  • 风险投资账户模式不足以代表失败的计划.
  • 当计划实现失败或有缺陷时,不清楚如何将实体和流程联系起来.
  • 这些问题加剧了动态或不断变化的计划.

结论:

  • 为表示失败的计划提出了两种解决方案:使用"规定的"关系或将计划创建纳入执行表示.
  • 假设"由"关系适用于大多数情况.
  • 需要进一步的研究来验证这些解决方案并探索替代方案.