unsteady state

简明释义

不稳定状态

英英释义

例句

1.The weather conditions can cause an unsteady state in atmospheric pressure.

天气条件会导致大气压力处于不稳定状态。

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

在实验过程中，我们观察到系统在达到平衡之前处于不稳定状态。

3.The machine operates in an unsteady state, which leads to inconsistent output.

这台机器处于不稳定状态，导致输出不一致。

4.When the car accelerates rapidly, it enters an unsteady state of motion.

当汽车快速加速时，它进入了一个不稳定状态。

5.The fluid dynamics simulation showed that the flow was in an unsteady state during the initial phase.

流体动力学模拟显示，在初始阶段，流动处于不稳定状态。

作文

In the realm of physics and engineering, the term unsteady state refers to a condition where the properties of a system change over time. This is in contrast to a steady state, where all variables remain constant. Understanding the concept of unsteady state is crucial for analyzing various phenomena, from fluid dynamics to heat transfer. For example, consider a heating system in a building. When the heater is turned on, the temperature of the air in the room begins to rise. Initially, the temperature is low, but as time progresses, it gradually increases until it reaches a certain level. During this process, the system is in an unsteady state, as the temperature is not constant and is changing with respect to time.The significance of studying unsteady states lies in its application across multiple fields. In environmental science, understanding how pollutants disperse in the atmosphere can be modeled as an unsteady state problem. The concentration of pollutants may vary due to changes in wind speed, temperature, and other atmospheric conditions. By developing models that account for these variations, scientists can predict how long it will take for an area to recover from pollution or what measures need to be taken to minimize impact.In engineering, especially in the design of systems like reactors or turbines, engineers must often deal with unsteady state conditions during the startup or shutdown phases. For instance, when a chemical reactor is turned on, the reaction rates and temperatures do not instantly reach their desired values. Instead, they fluctuate until a stable operation point is achieved. Engineers must carefully monitor these unsteady state conditions to ensure safety and efficiency.Moreover, in the field of control systems, the analysis of unsteady states is essential for designing feedback loops that stabilize systems. For example, in an autonomous vehicle, the control system must constantly adjust to changes in speed, direction, and external conditions. These adjustments occur in an unsteady state environment, where rapid changes require immediate responses to maintain stability and safety.In conclusion, the concept of unsteady state is vital for understanding how systems behave when they are not in equilibrium. Whether in thermal systems, environmental science, or engineering applications, recognizing and analyzing unsteady states allows for better predictions, designs, and interventions. As we continue to explore complex systems in various disciplines, the importance of mastering the principles surrounding unsteady states cannot be overstated. It is a fundamental aspect that underpins many scientific and engineering challenges we face today.

在物理和工程领域，术语unsteady state指的是系统属性随时间变化的状态。这与稳态相对，在稳态中，所有变量保持不变。理解unsteady state的概念对于分析各种现象至关重要，从流体动力学到热传递。例如，考虑一个建筑物中的加热系统。当加热器开启时，房间内空气的温度开始上升。最初，温度较低，但随着时间的推移，它逐渐升高，直到达到某个水平。在这个过程中，系统处于unsteady state，因为温度不是恒定的，并且随时间变化。研究unsteady states的重要性在于其在多个领域的应用。在环境科学中，了解污染物在大气中的扩散可以建模为一个unsteady state问题。由于风速、温度和其他大气条件的变化，污染物的浓度可能会有所不同。通过开发考虑这些变化的模型，科学家可以预测一个地区恢复污染所需的时间或需要采取什么措施来最小化影响。在工程领域，特别是在反应器或涡轮机的设计中，工程师必须在启动或关闭阶段处理unsteady state条件。例如，当化学反应器开启时，反应速率和温度不会立即达到所需值。相反，它们会波动，直到达到稳定的操作点。工程师必须仔细监测这些unsteady state条件，以确保安全和效率。此外，在控制系统领域，分析unsteady states对于设计稳定系统的反馈回路至关重要。例如，在自动驾驶汽车中，控制系统必须不断调整以应对速度、方向和外部条件的变化。这些调整发生在unsteady state环境中，快速变化需要立即响应以维持稳定性和安全性。总之，unsteady state的概念对于理解系统在非平衡状态下的行为至关重要。无论是在热系统、环境科学还是工程应用中，认识和分析unsteady states能够更好地进行预测、设计和干预。随着我们继续探索各个学科中的复杂系统，掌握围绕unsteady states的原理的重要性不容小觑。这是支撑我们今天面临的许多科学和工程挑战的基本方面。