20071009听力原文

基于MATLAB的太阳能光伏电力仿真,模拟每日太阳能发电,可视化功率曲线,并通过数值积分计算总能量输出。.zip 1.版本:matlab2014a/2019b/2024b 2.附赠案例数据可直接运行。 3.代码特点:参数化编程、参数可方便更改、代码编程思路清晰、注释明细。 4.适用对象:计算机,电子信息工程、数学等专业的大学生课程设计、期末大作业和毕业设计。 立即下载
下面就是20071009的听力原文:
 Now, the VOA Special English program, Words and Their Stories.

Some unusual words describe how a person spends his or her time. For example, someone who likes to spend a lot of time sitting or lying down while watching television is sometimes called a " couch potato."( 电视虫,指一有时间就坐在沙发上看电视的人) A couch is a piece of furniture that people sit on while watching television.

Robert Armstrong, an artist from California, developed the term couch potato in nineteen-seventy-six. Several years later, he listed the term as a trademark with the United States government. Mister Armstrong also helped write a funny book about life as a full-time television watcher. It is called the "Official Couch Potato Handbook."

Couch potatoes enjoy watching television just as " mouse potatoes"( 网虫,指整天坐在电脑前的电脑迷) enjoy working on computers. A computer mouse is the device that moves the pointer, or cursor, on a computer screen. The description of mouse potato became popular in nineteen-ninety-three. American writer Alice Kahn is said to have invented the term to describe young people who spend a lot of time using computers.

Too much time inside the house using a computer or watching television can cause someone to get " cabin fever."( 厌烦的,不安的) A cabin is a simple house usually built far away from the city. People go to a cabin to relax and enjoy quiet time.

Cabin fever is not really a disease. However, people can experience boredom and restlessness if they spend too much time inside their homes. This is especially true during the winter when it is too cold or snowy to do things outside. Often children get cabin fever if they cannot go outside to play. So do their parents. This happens when there is so much snow that schools and even offices and stores are closed.

Some people enjoy spending a lot of time in their homes to make them nice places to live. This is called "nesting" or "cocooning." Birds build nests out of sticks to hold their eggs and baby birds. Some insects build cocoons around themselves for protection while they grow and change. Nests and cocoons provide security for wildlife. So people like the idea of nests and cocoons, too.

The terms cocooning and nesting became popular more than twenty years ago. They describe people buying their first homes and filling them with many things. These people then had children.

Now these children are grown and have "left the nest." They are in college. Or they are married and starting families of their own far away. Now these parents are living alone without children in their " empty nest."( 空巢,儿女长大离家) They have become " empty nesters."( 空巢者,指年龄介于40岁和59 岁之间的人士,其儿女接近独立的年龄,自己处于事业的巅峰或将要退休,家累减轻,财力较强的阶段)

This VOA Special English program, WORDS AND THEIR STORIES, was written by Jill Moss. I'm Faith Lapidus.
 
【电力负荷预测】项目介绍 MATLAB实现基于BO-Transformer-LSTM贝叶斯优化算法(BO)优化Transformer-LSTM组合模型进行居民用户多步电力负荷预测(含模型描述及部分示例 内容概要:本文介绍了一个基于BO-Transformer-LSTM的组合模型,用于实现居民用户多步电力负荷预测的完整项目实例。该模型融合Transformer的全局注意力机制与LSTM的局部时序记忆能力,构建能够捕捉长时依赖与周期性特征的深度学习架构,并引入贝叶斯优化(BO)自动搜索最优超参数组合,提升预测精度与训练效率。项目涵盖从原始数据清洗、特征工程、滑动窗口样本构建、模型设计到超参数优化、反归一化及多步误差评估的全流程,强调时间顺序划分以防止信息泄露,并通过周期编码、外生变量融合等方式增强数据表达能力。文中提供了详细的MATLAB代码示例,包括数据预处理、网络搭建、贝叶斯优化配置和预测结果评估等关键步骤。 适合人群:具备一定机器学习和时间序列分析基础,熟悉MATLAB编程环境,从事电力系统预测、智能电网、负荷管理等相关领域的研究人员、工程师及研究生。 使用场景及目标:①应用于居民级或多用户聚合负荷的短期至中期多步预测(如未来24小时);②服务于配电系统运行调度、需求响应基线设定、家庭能源管理系统优化、分布式能源协调控制等实际工程场景;③为科研提供可复现的深度学习+贝叶斯优化的技术路线参考。 阅读建议:此资源以实际项目为导向,建议读者结合提供的代码逐步实现并调试模型,重点关注数据质量控制、时间特征编码、组合网络结构设计与贝叶斯优化稳定性之间的协同关系,在实践中深入理解多步预测中的误差累积机制与超参数敏感性问题。 立即下载

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