每日英语听力 Day8

Welcome to the Listening Time podcast. Hey everybody this is Coner and you are listening to episode 123 of the Listening Time podcast I hope you are all doing great at the time of recording this it’s the very end of summer here in the Northen of ?hemisphere and so autumn is just around the corner in English when we say that something is just around the corner we are saying that it’s just about to appear or it’s about to happen it’s gonna happen very soon.

So fall is just around the corner and a lot of people are really happy about this because a lot of people here like this season they like autumn they like to see the colors'->\ changing they like this season or food->seasonal food there are a lot of different kind->types of food that people start to eat during the->\ autumn that they don’t eat in->during the spring or summer and so a lot of people like this season.

One fun thing about this season is there’re a lot of activities for childern for example pangkong->pumpkin patches these are->\ places where they see->sell pumpkins but they also have a lot of activities for kids and me and my family we are planing on going to a couple of pumpkin patches this season and I think i will do an episode on pumpkin pathches so you’ll get to hear about that hopefully.

And I was thinking about this episode->topic of fun activities for children because I was thingking of pumpkin patches and a->about different things like that and i decided that i wanted to do an episode about some of my favorite activities that I did when I was a kid. So my childhood activities specific things that I did outdoors. Things I did outside I thought I->it would be fun to look back and remember my childhood and some of my favorite things that i did outside so i hope that this is->will be an interesting episode for you today.

And before we start i want to remind you that my new podcast is avaliable now Us conversations where I talk to different English teachers from around the US and we talk about many things and have natural conversations with->at normal speed and you have a->the transcript availbale with the definations of keywords and phrases we use so make sure to sign up for that if you are interested the link is in the episode description below this episode that is patreon.com/usconversations.

And if you want my specialized training to help you undersatand native speakers when they speak fast then make sure to join my membership the link is also in the description of->below this episode so click on that and join if you are interested in getting my specialized training.

And of course if you are a Spanish or Portuguess speaker you can also check out my e-book if you want to start reading fictions->\ in English those links are down below as well and if you like this episode please share it with anyone else you know who is learning English and please give it a five-star rating and write a review. Alright let’s get started.

Are you ears ready? you know what time it is. It’s listening time.

Alright let’s talk about some of my favorite childhood activities that i did. some of my favorite things i did outdoor->outdoors because i did somethings in doors->indoors as well i have->had some fun activities that i did inside. but i want to focus on the outdoors activies today. so the first one that i want to talk about is buiding a tree house so you’ve probably seen this in movies or TV shows before where the kids build an some types->some type of house in their back yard->backyard maybe in a big tree and this is something that is pretty class->classic trandition here in the US.

带开环升压转换器和逆变器的太阳能光伏系统 太阳能光伏系统驱动开环升压转换器和SPWM逆变器提供波形稳定、设计简单的交流电的模型 Simulink模型展示了一个完整的基于太阳能光伏的直流到交流电力转换系统,该系统由简单、透明、易于理解的模块构建而成。该系统从配置为提供真实直流输出电压的光伏阵列开始,然后由开环DC-DC升压转换器进行处理。升压转换器将光伏电压提高到适合为单相全桥逆变器供电的稳定直流链路电平。 逆变器使用正弦PWM(SPWM)开关来产生干净的交流输出波形,使该模型成为研究直流-交流转换基本操作的理想选择。该设计避免了闭环和MPPT的复杂性,使用户能够专注于光伏接口、升压转换和逆变器开关的核心概念。 此模型包含的主要功能: •太阳能光伏阵列在标准条件下产生~200V电压 •具有固定占空比操作的开环升压转换器 •直流链路电容器,用于平滑和稳定转换器输出 •单相全桥SPWM逆变器 •交流负载,用于观察实际输出行为 •显示光伏电压、升压输出、直流链路电压、逆变器交流波形和负载电流的组织良好的范围 •完全可编辑的结构,适合分析、实验和扩展 该模型旨在为太阳能直流-交流转换提供一个干净高效的仿真框架。布局简单明了,允许用户快速了解信号流,检查各个阶段,并根据需要修改参数。 系统架构有意保持模块化,因此可以轻松扩展,例如通过添加MPPT、动态负载行为、闭环升压控制或并网逆变器概念。该模型为进一步开发或整合到更大的可再生能源模拟中奠定了坚实的基础。
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