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相关概念视频

Design Example: Sustainability in Concrete Building01:26

Design Example: Sustainability in Concrete Building

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As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
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Energy Conservation and Bernoulli's Equation01:16

Energy Conservation and Bernoulli's Equation

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Applying the conservation of energy principle or the work-energy theorem to an incompressible, inviscid fluid in laminar, steady, irrotational flow leads to Bernoulli's equation. It states that the sum of the fluid pressure, potential, and kinetic energy per unit volume is constant along a streamline.
All the terms in the equation have the dimension of energy per unit volume. The kinetic energy per unit volume is called the kinetic energy density, and the potential energy per unit volume is...
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Potential-Energy Criterion for Equilibrium01:16

Potential-Energy Criterion for Equilibrium

635
Potential energy or potential function plays an essential role in determining the stability of a mechanical system. If a system is subjected to both gravitational and elastic forces, the potential function of the system can be expressed as the algebraic sum of gravitational and elastic potential energy. If the system is in equilibrium and is displaced by a small amount, then the work done on the system equals the negative of the change in the system's potential energy from the initial to...
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P-N junction01:11

P-N junction

690
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
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Sustainable Development01:43

Sustainable Development

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As the human population continues to grow and use resources, we must be mindful of our planet’s natural limits. Sustainable development provides a pathway to maintain and improve human life now while also ensuring that future generations will have the resources that they need. The long-term success of sustainability efforts rests on understanding the interplay between human actions and ecological systems.
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Production Efficiency01:01

Production Efficiency

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Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
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相关实验视频

Updated: Sep 17, 2025

Operation of a 25 KWth Calcium Looping Pilot-plant with High Oxygen Concentrations in the Calciner
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采购当地净零投资:英国的一个案例研究.

Colin Nolden1,2, Sean Fox3, Emilia Melville3

  • 1University of Sheffield, Sheffield, UK.

Energy efficiency
|July 4, 2025
PubMed
概括
此摘要是机器生成的。

英国地方当局面临着净零目标的资源减少. 公共采购,就像布里斯托尔城市飞跃,吸引投资,但增加风险和成本,需要谨慎管理,以获得公平的结果.

关键词:
气候融资就是气候融资.签订了合同 签订了合同能源服务 能源服务净零是零的净零.公共采购部门的采购风险 风险 风险 风险 风险

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科学领域:

  • 环境政策和经济学
  • 公共管理和治理公共管理和治理.
  • 可持续的城市发展

背景情况:

  • 英国地方政府因紧缩政策和成本上升而面临资源限制.
  • 中央政府的脱碳资金具有竞争力,限制了直接的资源配置.
  • 基于地点的零净投资至关重要,但难以获得.

研究的目的:

  • 检查公共采购对净零投资的风险和机会.
  • 分析布里斯托尔城市飞跃的公私合作伙伴模式.
  • 评估采购在确保长期净零投资方面的有效性.

主要方法:

  • 使用研讨会和与利益相关者和专家的采访进行定性研究.
  • 分析布里斯托尔市飞跃合资公司的采购和早期交付情况.
  • 交易成本经济学原理的应用.

主要成果:

  • 布里斯托尔城市飞跃模式显著增加了净零投资.
  • 这种采购方法给地方当局带来了更多的风险和交易成本.
  • 公私伙伴关系模型强调了投资量和成本/风险之间的权衡.

结论:

  • 尽管资源有限,但公共采购可以促进大量的净零投资.
  • 成功交付需要强大的采购能力,尽职调查和监督.
  • 确保公正和公平的净零结果需要持续的监测和验证.