subcritical

简明释义

英[sʌbˈkrɪtɪkəl]美[ˌsʌbˈkrɪtɪkəl]

adj. 临界值以下的；（核物理用语）次临界的；（液流）次临界速度的

英英释义

单词用法

同义词

反义词

例句

1.During the modeling of hydrodynamic field, the rotational body and subcritical velocity models are utilized.

在水压场模型的建立过程中，采用了回转体模型和浅水亚临界模型。

2.The cleaning process has been applied on a subcritical pressure boiler in Douhe power plant with satisfied economical results.

在陡河电厂的亚临界参数锅炉上已采用了碱处理洗硅与钝化工艺，并取得了良好的经济效果。

3.SA213-T91 steel with inferior welding performance is used on end superheater of domestic-made 600MW subcritical boil- er.

针对国产600MW亚临界机组锅炉末级过热器采用焊接性能较差的SA 213-T91钢材。

4.Based on Experimental investigations, the DNB characteristics of steam-water mixtures in one-side heated vertical tubes under subcritical pressure are discussed.

在试验研究的基础上，讨论了亚临界压力单面受热垂直管内汽水混合物传热恶化的特点。

5.In a hole in the center of this system is placed a subcritical sphere of fissionable material.

在这个系统的中心圆洞中放置一枚次临界的球形可裂变物质。

6.The Influence of the quenching and tempering treatment and the different subcritical treatment on microstrcture and property of a high alloy white cast iron was studied.

研究表明，通过亚临界热处理可以使含有大量残留奥氏体的高铬铸铁产生二次硬化，从而提高高铬铸铁的硬度和耐磨性。

7.But the beginning of the acoustic emission sign is not the cracking point of main crack, and the preinstability stage may not be equal to the subcritical growth stage.

但是，声发射信号的起始点并不是主裂纹起裂点，失稳前阶段也不能与亚临界扩展阶段等同。

8.The scientists measured the neutron flux in the subcritical assembly to ensure safety.

科学家们测量了亚临界组件中的中子通量以确保安全。

9.The research focused on the behavior of materials under subcritical conditions.

研究集中在材料在亚临界条件下的行为。

10.The reactor operates in a subcritical state, meaning it is not capable of sustaining a nuclear chain reaction.

反应堆处于亚临界状态，意味着它无法维持核链式反应。

11.To prevent accidents, the design must ensure that the system remains subcritical at all times.

为了防止事故，设计必须确保系统始终保持亚临界状态。

12.In a subcritical environment, the material does not reach critical mass for fission to occur.

在亚临界环境中，材料不会达到裂变发生的临界质量。

作文

In the field of nuclear physics, the term subcritical refers to a state in which a nuclear reaction is not self-sustaining. This is an important concept when discussing nuclear reactors and their operation. A subcritical system is one where the number of neutrons produced by fission is less than the number of neutrons needed to sustain the reaction. Essentially, it means that if the system were to be left alone, it would not continue to produce energy on its own. Understanding subcritical states is crucial for ensuring safety in nuclear power generation. When a nuclear reactor operates in a subcritical state, it allows for careful control over the fission process. Operators can adjust the fuel and control rods to maintain this state, ensuring that the reactor does not reach critical mass, where a runaway reaction could occur. This controlled environment is vital for the safe production of energy. In contrast, a critical or supercritical state can lead to dangerous situations if not managed properly. The concept of subcritical is not limited to nuclear physics; it also finds applications in various scientific fields. For example, in the study of chemical reactions, a subcritical condition might refer to a situation where reactants do not have enough energy to overcome the activation barrier, thus preventing the reaction from proceeding. This highlights the importance of energy levels in determining whether a reaction will occur. In environmental science, understanding subcritical thresholds can help in assessing ecosystem stability. For instance, certain species may only thrive in conditions that are below a subcritical threshold of pollution or habitat degradation. If these thresholds are exceeded, the ecosystem could shift to a different state, potentially leading to loss of biodiversity. Moreover, in the context of engineering, subcritical designs are often employed to enhance safety. Engineers may create structures that operate under subcritical stress levels to prevent catastrophic failures. This principle is applied in various industries, from aerospace to civil engineering, where safety is paramount. In summary, the term subcritical signifies a state of being below a critical threshold, whether it pertains to nuclear reactions, chemical processes, ecological stability, or engineering safety. Its significance lies in the ability to control and manage systems effectively to prevent undesirable outcomes. By maintaining subcritical conditions, we can ensure safety and sustainability across various domains. As we advance in technology and our understanding of complex systems, the importance of recognizing and managing subcritical states will only grow. It is essential for scientists, engineers, and policymakers to be aware of these concepts to make informed decisions that protect both human life and the environment.

在核物理学领域，术语subcritical指的是一种核反应状态，该状态不具备自我维持的能力。这是讨论核反应堆及其操作时的重要概念。subcritical系统是指裂变产生的中子数量少于维持反应所需的中子数量。简单来说，这意味着如果该系统被单独放置，它将不会继续自行产生能量。理解subcritical状态对于确保核能发电的安全至关重要。当核反应堆在subcritical状态下运行时，可以对裂变过程进行仔细控制。操作员可以调整燃料和控制棒以维持此状态，确保反应堆不会达到临界质量，从而导致失控反应的发生。这种受控环境对于安全产生能量至关重要。相比之下，临界或超临界状态如果管理不当，可能会导致危险情况。subcritical的概念不仅限于核物理；它在各个科学领域也有应用。例如，在化学反应的研究中，subcritical条件可能指的是反应物没有足够的能量克服活化障碍，从而阻止反应的进行。这突显了能量水平在确定反应是否发生中的重要性。在环境科学中，理解subcritical阈值有助于评估生态系统的稳定性。例如，某些物种可能仅在低于subcritical污染或栖息地退化阈值的条件下繁衍生息。如果这些阈值被超过，生态系统可能会转变为不同的状态，可能导致生物多样性的丧失。此外，在工程学背景下，subcritical设计通常被用来增强安全性。工程师可能会创建在subcritical应力水平下运行的结构，以防止灾难性故障。这个原则应用于各个行业，从航空航天到土木工程，安全始终是重中之重。总之，subcritical一词表示低于临界阈值的状态，无论是涉及核反应、化学过程、生态稳定性还是工程安全。它的重要性在于能够有效控制和管理系统，以防止不良结果的发生。通过维持subcritical条件，我们可以确保在各个领域的安全和可持续性。随着科技的进步和我们对复杂系统理解的加深，识别和管理subcritical状态的重要性只会愈发增长。科学家、工程师和政策制定者必须意识到这些概念，以做出保护人类生命和环境的明智决策。