unsteady state

简明释义

非稳定态

英英释义

例句

1.During the experiment, we observed that the temperature was in an unsteady state before reaching equilibrium.

在实验过程中，我们观察到温度处于不稳定状态，还未达到平衡。

2.Engineers need to account for the unsteady state of the fluid flow when designing pipelines.

工程师在设计管道时需要考虑流体流动的不稳定状态。

3.In climate modeling, an unsteady state can indicate rapid changes in weather patterns.

在气候建模中，不稳定状态可能表明天气模式的快速变化。

4.The system is currently in an unsteady state, which means it is not yet stable and may fluctuate.

该系统目前处于不稳定状态，这意味着它尚未稳定，可能会波动。

5.The financial market is often characterized by an unsteady state during major political events.

在重大政治事件期间，金融市场常常表现出不稳定状态。

作文

In the realm of physics and engineering, the term unsteady state refers to a condition in which variables change over time, as opposed to a steady state where conditions remain constant. Understanding the concept of unsteady state is crucial for analyzing dynamic systems that are subject to fluctuations, such as temperature changes in a heated object or pressure variations in a fluid flow. This concept is not only limited to physical sciences but also extends to various fields, including economics, biology, and environmental science.For instance, consider the case of a car accelerating from a stoplight. Initially, the car is at rest, but as the driver presses the accelerator, the speed of the car increases. During this period of acceleration, the car is in an unsteady state because its velocity is changing. Once the car reaches a constant speed, it transitions into a steady state where the velocity remains unchanged. This example illustrates how many real-world scenarios involve periods of unsteady state before reaching equilibrium.In engineering applications, the analysis of unsteady state conditions is essential for designing systems that can respond effectively to changes. For example, in thermal engineering, when a metal rod is heated at one end, the temperature distribution along the rod changes over time until it reaches a steady state. During the heating process, the system is in an unsteady state, and engineers must calculate how long it will take for the entire rod to reach a uniform temperature. This involves solving complex differential equations that describe the heat transfer process.Similarly, in fluid dynamics, the flow of water through a pipe can also exhibit unsteady state behavior. If a valve is suddenly opened or closed, the flow rate changes rapidly, creating pressure waves that propagate through the fluid. Engineers need to consider these unsteady state effects to ensure that pipelines can withstand the resulting pressures and avoid failures.Biological systems also demonstrate unsteady state characteristics. For instance, when a population of bacteria is introduced to a nutrient-rich environment, it initially grows rapidly. This growth phase is marked by an unsteady state as the population size increases exponentially. Over time, as resources become limited, the growth rate slows down, and the population eventually stabilizes. Understanding these dynamics is vital for ecologists who study population behaviors and interactions within ecosystems.In conclusion, the concept of unsteady state plays a significant role across various disciplines. Whether in engineering, physics, biology, or economics, recognizing and analyzing unsteady state conditions enables us to predict how systems respond to changes and ultimately reach equilibrium. As we continue to explore complex systems in our world, the ability to understand and manage unsteady state phenomena will remain a critical skill for scientists and engineers alike.

在物理和工程领域，术语unsteady state指的是变量随时间变化的状态，与保持不变的稳态相对。理解unsteady state的概念对于分析受波动影响的动态系统至关重要，例如加热物体的温度变化或流体流动中的压力变化。这个概念不仅限于物理科学，还扩展到经济学、生物学和环境科学等多个领域。例如，考虑一辆汽车从红绿灯处加速的情况。最初，汽车处于静止状态，但当驾驶员踩下油门时，汽车的速度增加。在加速期间，汽车处于unsteady state，因为其速度在变化。一旦汽车达到恒定速度，它就转变为一个稳态，在这个状态下，速度保持不变。这个例子说明了许多现实世界的场景涉及unsteady state的时期，然后达到平衡。在工程应用中，分析unsteady state条件对于设计能够有效应对变化的系统至关重要。例如，在热工程中，当金属棒的一端被加热时，棒的温度分布会随着时间变化，直到达到稳态。在加热过程中，系统处于unsteady state，工程师必须计算整个棒达到均匀温度所需的时间。这涉及解决描述热传递过程的复杂微分方程。类似地，在流体动力学中，水通过管道的流动也可能表现出unsteady state行为。如果阀门突然打开或关闭，流量会迅速变化，产生压力波在流体中传播。工程师需要考虑这些unsteady state效应，以确保管道能够承受由此产生的压力并避免故障。生物系统也显示出unsteady state的特征。例如，当细菌种群被引入营养丰富的环境时，最初它们会迅速增长。这一增长阶段以unsteady state为特征，因为种群数量呈指数增长。随着资源变得有限，增长率会减缓，种群最终稳定下来。理解这些动态对于研究生态系统内种群行为和相互作用的生态学家至关重要。总之，unsteady state的概念在各个学科中发挥着重要作用。无论是在工程、物理、生物还是经济学中，识别和分析unsteady state条件使我们能够预测系统如何响应变化并最终达到平衡。随着我们继续探索世界中的复杂系统，理解和管理unsteady state现象的能力将始终是科学家和工程师的重要技能。