shunting yard

简明释义

档场

英英释义

例句

1.In the shunting yard 调车场, workers carefully organize the freight cars for efficient loading.

在调车场 调车场，工人们仔细整理货车，以便高效装载。

2.A new shunting yard 调车场 was constructed to handle the increased traffic in the region.

为了应对该地区日益增加的交通量，新建了一个调车场 调车场。

3.The railway company invested in modern technology to improve operations at the shunting yard 调车场.

铁路公司投资现代技术，以改善调车场 调车场的运营。

4.The manager checked the schedule to see when the next train would arrive at the shunting yard 调车场.

经理查看了时间表，看看下一列火车何时到达调车场 调车场。

5.The train was delayed because it had to wait at the shunting yard 调车场 for other trains to pass.

由于其他列车需要通过，火车在调车场 调车场等候，导致延误。

作文

The concept of a shunting yard is fundamental in the field of computer science, particularly in the area of parsing and syntax analysis. A shunting yard is an algorithm invented by Edsger Dijkstra that converts infix expressions (the common arithmetic notation) into postfix expressions (also known as Reverse Polish Notation). Understanding this algorithm is crucial for anyone interested in programming languages and compilers.Infix notation is the way we typically write mathematical expressions, such as '3 + 4'. However, for computers to evaluate these expressions efficiently, they need to be in a format that eliminates the ambiguity of operator precedence and parentheses. This is where the shunting yard algorithm comes into play.The shunting yard algorithm uses a stack data structure to hold operators and another output list for the final expression. The process begins by reading the input expression from left to right. When an operand (like a number) is encountered, it is immediately added to the output. When an operator (like '+') is found, the algorithm checks the stack for operators with higher or equal precedence and pops them to the output before pushing the new operator onto the stack.Parentheses are handled specially in the shunting yard algorithm. When a left parenthesis '(' is encountered, it is pushed onto the stack, and when a right parenthesis ')' is found, the algorithm pops from the stack to the output until a left parenthesis is at the top of the stack. This ensures that the operations within parentheses are evaluated first.The beauty of the shunting yard algorithm lies in its simplicity and efficiency. It allows for the conversion of complex expressions into a format that can be easily evaluated by machines. Once the entire expression has been read, any remaining operators in the stack are popped to the output, resulting in a complete postfix expression.In practice, the shunting yard algorithm is not only limited to mathematical expressions but can also be applied to other types of syntactic structures in programming languages. For example, it can be used to parse expressions in languages like Java, C++, and Python. By understanding how to implement the shunting yard algorithm, developers can create more efficient parsers and interpreters for their programming languages.In conclusion, the shunting yard algorithm is a powerful tool in computer science, providing a systematic way to convert infix expressions into postfix notation. Its relevance extends beyond mathematics, impacting the development of programming languages and compilers. Mastering the shunting yard algorithm is essential for anyone looking to deepen their understanding of parsing techniques and improve their skills in software development.

“调度场”这一概念在计算机科学领域，尤其是在解析和语法分析方面至关重要。“调度场”是由埃德斯格·迪克斯特拉发明的一种算法，它将中缀表达式（常见的算术符号表示法）转换为后缀表达式（也称为逆波兰表示法）。理解这个算法对任何对编程语言和编译器感兴趣的人来说都是至关重要的。中缀表示法是我们通常书写数学表达式的方式，例如“3 + 4”。然而，为了让计算机有效地评估这些表达式，它们需要以一种消除运算符优先级和括号歧义的格式呈现。这就是“调度场”算法发挥作用的地方。“调度场”算法使用堆栈数据结构来保存运算符，并使用另一个输出列表来存储最终表达式。该过程从左到右读取输入表达式。当遇到操作数（如数字）时，它会立即添加到输出中。当找到运算符（如“+”）时，算法会检查堆栈中是否有更高或相等优先级的运算符，并在将新运算符推入堆栈之前将它们弹出到输出中。括号在“调度场”算法中被特殊处理。当遇到左括号“（”时，它被推入堆栈，而当找到右括号“）”时，算法会从堆栈中弹出到输出，直到左括号位于堆栈顶部。这确保了括号内的操作首先被评估。“调度场”算法的美在于其简单性和高效性。它允许将复杂表达式转换为机器可以轻松评估的格式。一旦整个表达式被读取，堆栈中剩余的运算符就会被弹出到输出中，从而生成完整的后缀表达式。在实践中，“调度场”算法不仅限于数学表达式，还可以应用于其他类型的编程语言中的语法结构。例如，它可以用于解析Java、C++和Python等语言中的表达式。通过了解如何实现“调度场”算法，开发人员可以为他们的编程语言创建更高效的解析器和解释器。总之，“调度场”算法是计算机科学中的一个强大工具，提供了一种系统化的方法，将中缀表达式转换为后缀表示法。它的相关性超越了数学，对编程语言和编译器的发展产生了影响。掌握“调度场”算法对于任何希望深入理解解析技术并提高软件开发技能的人来说都是必不可少的。