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Allegro 16.5中PCB设置层叠结构,添加层后type只有dielectric一个选项

2023-08-10 02:36:01
共1条回复
我不懂运营

你需要添加3个层后,type中才会显示conductor和plane选项的。因为添加中间层时,top与中间层之间会有一个dielectric层(介质层),中间层和中间层之间也要有一层dielectric层的。

也就是层与层之间需要添加dielectric层。你添加一层,系统会默认为dielectric层的。

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2023-08-07 02:47:112

职业的英语单词是什么

问题一:表示职业的英语单词有几十个,分别是什么 教师 teacher 医生doctor 男演员 actor 女演员actress 农民peasant 工人worker 清洁工cleaner 文员clerk 销售员sale *** an 助理assistant 编辑editor 艺术家artist 电工electrician 出纳员cashier 会计accountant 护士nurse 翻译员translator 厨师chef 网管webmaster 司机driver 搬运工carrier 快递员dispatcher 保安guardian 服务员waiter 保姆babysitter 发型师hairdresser 设计师designer 望采纳,谢谢! 问题二:关于职业的英语单词有哪些 教师 teacher 医生doctor 男演员 actor 女演员actress 农民peasant 工人worker 清洁工cleaner 文员clerk 销售员sale *** an 助理assistant 编辑editor 艺术家artist 电工electrician 出纳员cashier 会计accountant 护士nurse 翻译员translator 厨师chef 网管webmaster 司机driver 搬运工carrier 快递员dispatcher 保安guardian 服务员waiter 保姆bab鸡sitter 发型师hairdresser 设计师designer 亲,这些够吗? 问题三:他们的职业的英语单词是什么 their occupation 问题四:(职业,工作)的英语单词怎么写? 职业:occupation 比较正式 工作: work或者job 问题五:英语中有哪些职业的单词? pilot 驾驶员 simultaneous 同时译员 publisher 出版人员 graphic designer 美术设计员 delivery boy 送报员 secretary 秘书 policeman 警察 journalist 记者 editor 编辑 interpreter 通译者 director 导演 talent 星探 actor 男演员 actress 女演员 photographer 摄影师 producer 制片人 scholar 学者 translator 翻译家 novelist 小说家 playwright 剧作家 linguist 语言学家 botanist 植物学家 economist 经济学家 chemist 化学家 scientist 科学家 philosopher 哲学家 politician 政治学家 physicist 物理学家 astropologist 人类学家 archaeologist 考古学家 geologist 地质学家 expert on folklore 民俗学家 mathematician 数学家 biologist 生物学家 zoologist 动物学家 statistician 统计学家 physiologist 生理学家 geologist : 地质学家 futurologist 未来学家 artists 艺术家 painter 画家 musician 音乐家 poser 作曲家 singer 歌唱家 designer 设计家 sculptor 雕刻家 designer 服装设计师 fashion coordinator 时装调配师 dres *** aker 女装裁剪师 cutter 裁剪师 sewer 裁缝师 tailor 西装师傅 beautician 美容师 model 模特 ballerina 芭蕾舞星 detective 刑警 firefigher消防人员 chief of police 警察局长 taxi driver 出租车司机 clerk 店员 mailman 邮差 newspaper boy 报童 bootblack 擦鞋童 poet 诗人 copywriter 撰稿人 newscaster 新闻评论人 milkman 送奶人 merchant 商人 florist 卖花人 baker 面包师 greengrocer 菜贩 fish-monger 鱼贩 butcher 肉贩 shoe-maker 鞋匠 saleswoman 女店员 stewardess 空中小姐 conductor 车长 station agent 站长 porter 行李夫 car mechanic 汽车修理师 architect 建筑师 civil planner 城市设计师 civil engineer 土木技师 druggist, chemist, pharmacist 药剂师 guide 导游 oil supplier 加油工 (public) health nurse 保健护士 dentist 牙科医生 supervisor 监工 forman 工头 doctor 医生 nurse 护士 Nurserymaid保姆 receptionist 接待员 typist 打字员 key puncher 电脑操作员 stenographer 速记员 telephone operator 电话接线员 programmer 电脑程序员 syst......>> 问题六:关于职业的英文单词 WORKER 工人 LABOURER 劳动者 PHYSICAL LABOURER体力劳动者 MENTAL WORKER 脑力劳动者 SKILLED WORKER 熟练工人 UNSKILLED WORKER 非熟练工人 STEEL WORKER 钢铁工人 TEXTILE WORKER 纺织工人 MINER 矿工 MECHANIC 机工,技工 DRIVER 汽车司机 ENGINE DRIVER 火车司机 ELECTRICIAN 电工,电气技师 SAILOR 水手 GARDENER 园丁,花匠,菜农 FORGER 锻工 TURNER 车工,镟工 FITTER 装配钳工 CASTER 铸工 FOUNDRY WORKER 铸造工人,翻砂工人 PAINTER 油漆工 PLUMBER 管子工 BRICKLAYER 砌砖工 CARPENTER 木匠,木工(尢指粗木工) JOINER 细木工 SANITATION WORKER 环卫工人,清洁工 SWITCHMAN 扳道工 CHEF 主厨 COOK 厨师 SALESMAN 男售货员,男推销员 SALESWOMAN 女售货员,女推销员 COPPERSMITH 铜匠,铜器制造人 BLACKSMITH 铁匠,锻工 MILLER 铣工 PLANER 刨工 WELDER 焊工 PRINTER 印刷工人 SHIP-BUILDER 造船工人 PORTER 搬运行李工人 DOCKER 码头工人,船坞工人 STEVEDORE 码头工人,装卸工 LONGSHOREMAN 码头搬运工人 DRILLER 钻控工,打眼工 BUILDER 建筑工人 MESON 石匠 TAILOR 裁缝,缝工,成衣工 SPINNER 纺纱工 DYER染工 TEMPORARY WORKER 临时工 PROBATIONER 试用人员,练习生 ENGINEER 工程师,技师 DESIGNER 设计师 DOCTOR 医生,医帅,大夫 PILOT 驾驶员,飞行员,领航员, STEWARDESS 空中小姐 CAPTAIN 船长,机长 PROFESSOR 教授 LECTURER 讲师 TEACHER 教师 PRESIDENT 大学校长,大学院长,总统,董事长 HEADMASTER 中小学的男校长 HEADMISTRESS 中小学的女校长 ARTIST 艺术家,美术家 PAINTER 画家 MUSICIAN 音乐家 VIOLINIST 小提琴手 PIANIST 钢琴家 SINGER 歌唱家 SONGSTER 歌手 DECORATOR 室内装饰师 SPORTSMAN 运动家,运动员 COACH 教练 REEREE 足球等的裁判员 SCOREKEEPER 记分员 LAWYER 律师 BUSINESSMAN 实业家,商人 TRADESMAN 零售商人,小商人 PEDLAR 小贩,商贩 FARMER 农民 WEATHERMAN 气象员 VETERIANARIAN 兽医 BEE-KEEPER / APIARISE 养蜂人,养蜂家 FISHERMAN 渔民,捕鱼人...>>
2023-08-07 02:47:191

剖析 Aeron IPC 实现

最近玩了一下 Aeron ,主要用了其中的 IPC 通信功能,总的感觉封装的很好,用起来很方便,所以花了点儿时间研究了一下内部实现,简单做个笔记。 至于 UDP 通信和 archive、cluster 高级特性没有尝试,本文不涉及。 在 《Aeron Cookbook》 中有一个很清晰的架构图: 这张图画的很好,但是对应的是 UDP 通信的场景,至于 IPC 通信的场景实际上没那么复杂,所以我简化了一下: 在 IPC 通信的场景下: 要理解两个 Conductor 之间的交互实现,首先得理解 cnc.dat 文件。 cnc 全称是 command and control(命令与控制),顾名思义通过这个文件实现管理操作。 这里需要关注两个部分: [to-driver Buffer] 和 [to-clients Buffer]。 Client 通过 [to-driver Buffer] 这个“通道”向 Driver 发送命令;Driver 通过 [to-clients Buffer] 这个“通道”向 Client 回复命令或者通知。 [to-driver Buffer] 这个“通道”的封装是 ManyToOneRingBuffer,也就是一个环形缓冲区。Many To One,也就是多个 Client 可以并发写入,但是只有一个 Driver 读取。 [to-clients Buffer] 这个“通道”是个广播的“通道”,所以在 Driver 这里的封装是 BroadcastTransmitter,在 Client 这里的封装是 BroadcastReceiver。 这个 BroadcastTransmitter 并不保证消息可靠交付,但是 [to-driver Buffer] 与 [to-clients Buffer] 一问一答,偶尔附加些通知的用法,基本也不会丢数据。 至于这个“一问一答”如何关联,实际上很简单,每一个命令里都一个唯一的 correlationId,对应的回复里也会有这个信息,所以通过这个唯一的 id 就能匹配请求与响应。 correlationId 通过 RingBuffer 尾部的 CORRELATION_COUNTER 生成,保证唯一性。 Driver Conductor 在处理完命令后,会更新 RingBuffer 尾部的 CONSUMER_HEARTBEAT,客户端可以通过这个心跳时间判断 Media Driver 是否正常。 第一个:并发写入 写入时用了 tryClaim + commit 这个组合,tryClaim 声明一定长度的空间,以供命令写入,对并发问题的解决也在 tryClaim 方法中。 简单来说就是 cas 更新 TAIL_POSITION 字段。 第二个:读取命令 由上面可知,不能简单的通过 TAIL_POSITION 读取命令,实际上 Driver Conductor 是通过 Length 字段是否大于 0 判断的。 这个行为是在 commit 操作时保证的,首先在 Length 字段写入负的长度,然后再写入接下来的 Type 和 Encoded Message,最后再在 Length 字段写入正的长度,此时就能保证读取到完整的命令。 第三个:写入线程异常 有上面可知,命令的写入不是原子性的,存在命令写了一半,写入线程异常的可能性,如果 Length 字段一直是负值,那么将会持续阻塞 Driver Conductor 的读取。 解决这个问题的方法也很简单:Driver Conductor 会在超时时间后主动 unblock,也就是识别跳过异常的区域。 [to-clients Buffer] 这个广播的逻辑就更简单了,因为写入是单线程的,所以没有并发的场景需要处理。 第一个:识别消息是否被覆盖 Driver Conductor 在写入消息(以及更新 TAIL_COUNTER 和 LATEST_COUNTER)之前会首先更新 TAIL_INTENT_COUNTER。Client Conductor 在消费之前首先会校验当前读的 cursor(本地缓存)是否落后于 TAIL_INTENT_COUNTER。当然这里没有加锁,是个乐观的策略。 上面两张图已经展示了 addPublication 和 addSubscription 的交互过程,下面看一下具体的发布订阅关系。 在进入具体的发布订阅逻辑之前,我们先看一下 logbuffer 的结构: 整个用于数据传输的共享内存分为了三个 Term,三个 Term 轮换使用,分为 active、dirty 和 clean 三个状态。( AeronCookbook 中有个动画演示 ) 具体到实现中,Term 的轮换是通过 Log Meta Data 中的 Active Term Count 完成的,active 的 Term 索引是 (Active Term Count % 3),轮换就是个自增操作。 另外 Log Meta Data 中的 Tail Counter # 指示当前的写入位置。 这个 Counter 分为两部分,高 32 位是 termId,通过 termId 可以计算出本 Term 的起始位置,低 32 为是 Term 中的最对偏移量。 由于 termId 是 32 位的,可想而知是可能溢出的,这就限制了单个 logbuffer 写“过”的最大数据量为 termBufferLength * (1L << 31)。 具体到发表的逻辑,Aeron 提供了支持并发的 ConcurrentPublication 封装,也提供了单线程的 ExclusivePublication 封装,可想而知支持并发会有一些性能损失。 跟第 2 节的 ManyToOneRingBuffer 一样,Publication 也提供了 offer 和 tryClaim+commit 两套 API,只是 Client Conductor 仅用了 tryClaim+commit,所以上面没有介绍 offer,在这里也不看 offer,原因是通过 tryClaim+commit 更容易理解其本质。 先看一下 ExclusivePublication 的实现,先理解主干逻辑,再理解并发控制比较容易。 这里有个背压的阈值,也就是 pub-lmt,这个值是在 Driver Conductor 中维护的,简而言之就是消费的位置加上 termWindowLength。这个 logbuffer 可以理解为 ManyToManyRingBuffer,所以在控制写入位置上会更复杂,需要一个独立的协调者(也就是 Driver Conductor),这跟第 2 节 ManyToOneRingBuffer 的处理方式是不同的。 接下来的主干逻辑就很直观了,首先找到待写的 term,然后调用 ExclusiveTermAppender 的 claim 方法。这里的逻辑与 ManyToOneRingBuffer 一脉相承,更新 Tail Counter,然后写入 header,并且 length 字段先写入一个负值,等到 commit 时再写入正值。 但是也有本 Term 剩余空间不够的情况,此时填充一个 PADDING_FRAME,然后返回 -1。 最后就是更新本地位置变量,如果返回 -1,那就是需要轮换 Term 了,具体操作就是更新 Active Term Count,以及对应的 Tail Counter #。 对于并发的 ConcurrentPublication 场景,主干逻辑的是一样的,需要保证线程安全的地方有两个: 第一个:写入线程异常 跟 2.1 节的情况一样,logbuffer 也存在写入一半,线程异常的可能性。此时依赖 Driver Conductor 这个协调者根据超时时间来做 unblock 操作。 由第 2 节的图可知,在消费之前,Conductor 的交互上有两步: 也就是说,订阅客户端的 Image 对应着具体的共享内存主体 IpcPublication,核心的读取逻辑也在 Image 中。 通过 position 就能计算出 term index,以及该 term 中的位置偏移,有了这两个信息就可以读取数据了。 读取的逻辑与 ManyToOneRingBuffer 也是一脉相承,通过 Length 字段是否大于 0 判断是否有消息。
2023-08-07 02:47:261

艺康斯 the conductor rca怎么样

艺康斯 the conductor rca总的看是相当不错的。艺康斯的线材虽然不同系列有一定区别,但这个品牌整体来说走的是细腻耐听,在同价位线材中属于均衡平均,偏向于好听和耐听线路。至于兄台所说的哪种程度,毕竟不知现在兄台期望值和现在声音的情况所以很难量化能提高到何种程度.。音质的好坏不单单看一个线材。
2023-08-07 02:47:362

如何看待 Nike 在科比退役时推出的广告 The Conductor

首先,这是湖人对阵开拓者的比赛。挺那个什么的……在赛季初的一场比赛湖人客场对阵开拓者,科比还未宣布赛季结束后退役。在一次上篮中,科比倒地不起,全场响起了刺耳的嘘声。虽然这种场面科比见多了,但是,自己已经处在生涯末期了,自己的球队又处在联盟倒数,听到这种嘘声,心里肯定不是滋味。这场比赛结束不久后,科比宣布赛季结束后退役。后来湖人有没有再一次做客开拓者我不知道,我没有跟着看。但是如果这就是科比最后一次客场对阵开拓者,其它球队都是很友好的欢送,而开拓者是这样,这就非常尴尬了………科比背身、晃动、转身、后仰、绝杀,一切都是科比经典的动作。大概也就是科比一生的写照了。这个广告的中心思想就是,科比即将在骂声中结束自己的职业生涯。当然了,这种骂不是唾弃,不是鄙夷,而是一种恨。恨科比打败自己的主队,恨科比打出不可思议的表现。对于科比而言,他对这种骂声对这种恨是非常享受的。他说过,恨我的人恨我的跳投,恨我的打铁,恨我的伟大,但是那些喜欢我的人,也是因为同样的理由。曾经戎马一生,从此解甲归田。我没有默默无闻地老去,还好离开的路上还有嘘声作伴,我在离去的路上不会无聊。我自然没有98神的最后一投那么光辉,但我已然满意。爱我的人谢谢你们,恨我的人请继续。
2023-08-07 02:47:541

如何看待 Nike 在科比退役时推出的广告 The Conductor

这个广告的中心思想就是,科比即将在骂声中结束自己的职业生涯。当然了,这种骂不是唾弃,不是鄙夷,而是一种恨。恨科比打败自己的主队,恨科比打出不可思议的表现。对于科比而言,他对这种骂声对这种恨是非常享受的。他说过,恨我的人恨我的跳投,恨我的打铁,恨我的伟大,但是那些喜欢我的人,也是因为同样的理由。曾经戎马一生,从此解甲归田。我没有默默无闻地老去,还好离开的路上还有嘘声作伴,我在离去的路上不会无聊。我自然没有98神的最后一投那么光辉,但我已然满意。爱我的人谢谢你们,恨我的人请继续。
2023-08-07 02:48:011

conductor through

一次侧:200A 5/3.75VA(一次额定200A的电流;额定负载5VA,轻载时3.75VA) 砸数:1砸(该互感器是一次侧穿心式) 精度:0.5(等级) 二次侧:5A 50/60HZ 660V -------- 倍率是40,来源:2000A/5A= 40
2023-08-07 02:48:111

琴行招待英文用语?

老外沟通日常英语!
2023-08-07 02:48:202

怎么用英文介绍电线和电缆?

电线、电缆是指用以传输电能信息和实现电磁能转换的线材产品。电线:通常把只有金属导体的产品和在导体上敷有绝缘层外加轻型保护(如棉纱编织层、玻璃丝编织层、塑料、橡皮等)、结构简单、外径比较细小、使用电压和电流比较小的绝缘线,叫做电线。电缆:把既有导体和绝缘层,有时还加有防止水份侵入的严密内护层,或还加机械强度大的外护层,结构较为复杂,截面积较大的产品叫做电缆。电线、电缆是指用以传输电能信息和实现电磁能转换的线材产品。电线:通常把只有金属导体的产品和在导体上敷有绝缘层外加轻型保护(如棉纱编织层、玻璃丝编织层、塑料、橡皮等)、结构简单、外径比较细小、使用电压和电流比较小的绝缘线,叫做电线。电缆:把既有导体和绝缘层,有时还加有防止水份侵入的严密内护层,或还加机械强度大的外护层,结构较为复杂,截面积较大的产品叫做电缆。Wire,cablemeansfortransmittingelectromagneticenergyinformationandachieveenergyconversionwireproducts.Wire:usuallyonlythemetalconductorproductsandontheconductorcoatedwithaninsulatinglayertoprotecttheappliedlight(suchascottonbraid,braidglass,plastic,rubber,etc.),thestructureissimple,relativelysmallouterdiameter,theuseofrelativelysmallvoltagesandcurrentsinsulatedwire,calledthewire.Cable:boththeconductorandtheinsulationlayer,andsometimesaddedtopreventwateringresstightinnersheath,oralsoaddedlargemechanicalstrengthoftheexternalsheathstructureismorecomplex,cross-sectionalarealargerproductcalledthecable.
2023-08-07 02:48:281

关于几个英语单词的翻译。

遇见,听见,响起,告诉
2023-08-07 02:48:5813

初二英语阅读理解答案

初二英语阅读理解答案   下面是我为大家提供的初二的英语阅读理解练习以及答案,有兴趣的`朋友可以阅读学习一下哦!   第一篇:   One day he went on a long way alone. Before he left home,his wife said,Now you have all these things. You need them on your way. Take care of your things on the way.He went to the station. He bought a ticket and got on the train with it.   About an hour later,the conductor began to see the tickets. He came to the old man and said,Will you please show me your ticket?The old man looked for his ticket in all his pockets but he could not find it. He was very worried. I cant find my ticket. I really bought a ticket before I got on the train,said the old man.   I think you are right. I believe you bought a ticket. All right,you dont have to buy another ticket,said the conductor kindly. But the old man still(仍然) looked worried and said sadly,You dont know why Im worried. If I dont find my ticket,I cant remember my station. Where am I going?   1. The old man bought a ticket _______.   A. after he got on the train   B. before he got on the train   C. when the conductor told him to buy one   D. when he found he had no ticket with him   2. About an hour later,the conductor began _______.   A. to buy the tickets   B. to look for the tickets   C. to check(检查) the tickets   D. to show the tickets   3. The conductor told the old man that he didnt need to buy another ticket because _________.   A. the man was very old   B. he thought the old man had no money with him   C. the old man showed him the ticket   D. he believed the old man   4. The old man still looked worried because _________.   A. he couldnt get on the train.   B. he lost his ticket and a lot of money   C. he thought his wife would get angry with him   D. he forgot where he was going   5. Which of the following(下列) is right?   A. The old man went on the trip with his wife   B. The old man didnt find his ticket   C. The conductor was also an old man   D. The old man had to buy another ticket   第二篇:   The story happened during the Second World War(战争).An old man lived in a small town of Germany. He had three sons and they all worked in the same factory where he had worked. After the war had begun , his sons were all made to join the army one after another and they all died in the frights . The old man was very sad . he didnu2019t have enough food and was often hungry . And nobody helped him and he didnu2019t know how to go in living .   It was a very cold winter night . The old man couldnu2019t go to sleep . He had been hungry for two days and it was so cold in his room that ice could be seen . He had to get up and begun to run in the room until he lay down on the ground. The next morning he had to beg from door to door. He had been to a lot of cities and knew a lot.   Once he came to a village , but the villages were all poor and couldnu2019t give him anything . He was too hungry to go to another village . He thought hard and found a way . He came to a police station and called out , “Hitler is a foolish pig (希特勒是蠢猪)!"   Out came an old policeman at once . He took the old man into a room , gave him some bread and a cup of tea . Then he said , “Donu2019t say in our village , sir !”   “Iu2019m sorry, sir.” Said the old man . “I donu2019t know itu2019s Hitleru2019s hometown .”   “No, no , sir.” The policeman said in a hurry. “Itu2019s pigu2019s hometown !”   1. The old man was ___________.   A. a German B. a French   C. an Australian D. an Englishman   2. The old man was sad because ________.   A. his three sons all died during the war   B. His three sons had to join the army   C. He had no food or clothes   D. He lived in the small town alone   3. The old man got up and ran in his room to ________.   A. keep healthy   B. Forget he was sad and hungry   C. Make him warm   D. Find a way to forget he was hungry   4. The old man shouted outside the police station because______   A. he hated Hitler very much   B. he hoped the policeman could help him   C. he wanted to make the policemen angry   D. he thought the he would be given some food in prison (监狱)   5. Which statement is true?   A. The old policeman hated Hitler , too   B. The old policeman found that the old man his best friend   C. The old policeman would send the old man in prison   D. The old policeman liked Hitler better than pigs   第三篇:   Long, long ago there were only a few thousand people in the world. These people move form place to place over the land, hunting animals for food.   No one knows how or when these people learned about growing food. But when they did, their lives changed. They did not have to look for food any more. They could stay in one place and grow it.   People began to live near one another. And so the first village grew. Many people came to work in the villages. These villages grew very big. When machines appeared(出现), life in the villages changed again. Factories were built. More and more people lived near the factories. The cities grew very big.   Today some people are moving back to small towns. Can you tell why?   1. The best title(题目)of the text should be ___.   A. Cities or Villages B. Back to Towns   C. How Cities Grew D. People and Animals   2. The underlined word "they" in the second paragraph refers to(指的是) ___.   A. villages B. animals C. cities D. people   3. When factories were built, ___.   A. more people live near the factories   B. people began to live in the factories   C. many people began to work in villages   D. many machines appeared in big factories   4. We can learn from the text that ___.   A. people like to work only in big cities   B. some people don"t like to live in big cities   C. there will be no small towns in the future(将来)   D. it is better to live in cities than in villages   5. In what order did people do the following things?   A. Worked in villages B. Lived near the factories.   C. Learned to grow food. D. Built factories.   E. Began to live near each other.   A. d, b, a, e, c B. e, a, c, d, b,   C. c, e, a, d, b D. a. c. d. e. b   >>>>>>参考答案<<<<<<   第一篇:B C D D B   第二篇:A A C D A   第三篇:1. C 2. D 3. A 4. B 5. C ;
2023-08-07 02:49:251

P型半导体和N型半导体的区别是什么?

P型半导体和N型半导体是两种基本的半导体材料,它们是由纯净的半导体材料(如硅或锗)通过掺杂引入杂质原子而形成的。P型半导体和N型半导体的区别决定了它们在半导体器件中的不同应用,例如二极管、晶体管等,通过P-N结构的组合,可以实现更复杂的电子元件和电路。我将他们的区别整理了如下表格,方便大家自己区分对比。P型半导体和N型半导体的特性使得它们在半导体器件中相互组合使用,形成了重要的半导体器件,如二极管、晶体管等。通过控制P型和N型半导体之间的P-N结构,可以实现电流的控制和电子元件的功能。P型半导体:P型半导体是通过掺入三价杂质元素(如硼、镓等)来制备的。这些杂质原子取代晶格中的一些原子,并在晶格中留下一个空位。掺入三价杂质后,会留下额外的自由电子能级,因为三价杂质原子的外层只有三个电子。这些额外的自由电子能级被称为“空穴”,可以看作是缺少一个电子的正电荷载流子。在P型半导体中,“空穴”是主要的载流子,并且表现出正电荷的导电性质。1.优点:高迁移率:P型半导体中的“空穴”作为主要的载流子,在晶格中移动时具有较高的迁移率,有利于电流的传输。低噪声:由于P型半导体中的电子数较少,其内部噪声相对较低,使其在一些低噪声应用中具有优势。低功耗:P型半导体的电流传输是通过“空穴”参与的,由于“空穴”的迁移率较高,相对较少的电荷移动可以实现较低的功耗。2.缺点:较低的电导率:由于“空穴”是正电荷载流子,其电导率相对较低,限制了P型半导体在一些高功率应用中的使用。电子寿命短:P型半导体中的“空穴”与自由电子很容易发生复合,导致电子寿命相对较短。温度敏感性:温度升高会增加“空穴”与自由电子的复合速率,影响P型半导体的性能稳定性。N型半导体:N型半导体是通过掺入五价杂质元素(如磷、砷等)来制备的。这些杂质原子取代晶格中的一些原子,同时提供额外的电子,因为五价杂质原子的外层有五个电子。这些额外的电子能级增加了导电性,使得N型半导体中的电子浓度较高,而载流子主要是自由电子,表现出负电荷的导电性质。1.优点:高电导率:N型半导体中的自由电子作为主要载流子,在晶格中移动时具有较高的迁移率和较高的电导率,适用于高功率应用。长电子寿命:N型半导体中的自由电子寿命相对较长,不容易与其他载流子复合,有利于长时间稳定的电流传输。温度稳定性:与P型半导体相比,N型半导体在高温下具有更好的性能稳定性。2.缺点:容易受到杂质污染:由于N型半导体中存在大量的自由电子,其容易被杂质原子吸附和掺杂,导致杂质污染问题。高噪声:由于自由电子数目较多,N型半导体内部噪声相对较高,不适用于一些低噪声应用。需要根据具体的应用场景和需求来选择使用P型半导体还是N型半导体,或者它们的组合结构(P-N结构)来满足特定的功能和性能要求。可以参考以下几方面:构建P-N结构:如果需要构建二极管、晶体管或其他类似器件,通常需要同时使用P型和N型半导体材料来形成P-N结构。在这种情况下,P型和N型半导体必须配合使用。导电性要求:考虑所需的导电性能。如果需要高电导率和高功率传输,N型半导体通常更适合,因为它具有较高的自由电子浓度和较高的电导率。如果功耗较低并且对电导率要求不高,P型半导体可能更合适。温度稳定性:考虑环境温度和设备工作温度。N型半导体通常在高温下具有较好的性能稳定性,而P型半导体在低温下可能更适用。噪声要求:对于对噪声敏感的应用,例如低噪声放大器,P型半导体可能更适合,因为它们通常具有较低的内部噪声。特殊要求:特定应用可能需要特殊的半导体材料。例如,硅基半导体通常适用于普遍的应用,而III-V族化合物半导体(如GaAs)通常在高频电子器件中使用。
2023-08-07 02:49:392

电流互感器的倍率怎么算?Primary 400A 5/3.75/VA Conductor 1T class0.5 Secondary 5A 50/60HZ 660V

你这个互感器ct,意思是,一次侧电流是400A的时候二次侧电流是5A,电流倍率是80:1,同时,二次侧带载能力是3.75VA。二次侧最高取样输出电压是660V.
2023-08-07 02:50:092

欧姆定律用英语怎么描述

上边的不错啊羡慕ING
2023-08-07 02:50:183

新概念二 第50课课文

Lesson 50 Taken for a ride 乘车兜风 I love travelling in the country, but I don"t like losing my way. I went on an excursion recently, but my trip took me longer than I expected. "I"m going to Woodford Green," I said to the conductor as I got on the bus, "but I don"t know where it is." "I"ll tell you where to get off." answered the conductor. I sat in the front of the bus to get a good view of the countryside. After some time, the bus stopped. Looking round, I realized with a shock that I was the only passenger left on the bus. "You"ll have to get off here," the conductor said. "This is as far as we go." "Is this Woodford Green?" I asked. "Oh dear," said the conductor suddenly. "I forgot to put you off." "It doesn"t matter," I said. "I"ll get off here." "We"re going back now," said the conductor. "Well, in that case, I prefer to stay on the bus," I answered. 【New words and expressions】 生词和短语 ★ride n. 旅行 trip(出差性的)旅行 travel(周游世界性的)旅行 journey(陆地上的)旅行 flight(空中)旅行 voyage(海上)旅行 tour 游玩 sightseeing 观光游 ride v. 骑(车),骑(马) ★excursion n. 远足 excursion n.游玩,郊游(近距离的) weekend"s excursion ★conductor n. 售票员 ★view n. 景色 sight n.景色,视线,视野 in one"s view = in one"s opinion 就某人看来 view n. 景色(主观性较强) sight n.景色;视线,视野(强调客观) 参考译文 我喜欢在乡间旅行,但却不愿意迷路.最近我作了一次短途旅行,但这次旅行所花费的时间比我预计的要长. “我要去伍德福德草地,”我一上车就对售票员说,“但我不知道它在那儿.” “我来告诉您在哪儿下车,”售票员回答说. 我坐在汽车的前部,以便饱览农村风光.过了一些时候,车停了.我环视了一下身旁,惊奇地发现车里就只剩我一个乘客了. “您得在这里下车,”售票员说,“我们的车就到此为止了.” “这里是伍德福德草地吗?”我问道. “哎呀,”售票员突然说,“我忘了让您下车了.” “没关系,”我说,“我就在这儿下吧.” “我们现在要返回去,”售票员说. “好吧,既然如此,我还是留在车上吧.”我回答说. 【课文讲解】 love doing/like doing 强调一种习惯,喜欢做某事 I love my brother,but I don"t like his girlfriend. I love having dinner with you,but I don"t like paying for dinner. go on an excursion = have an excursion take 花费 take sb.some time Eg.: My trip took me a long time. it 形式主语 it takes sb.some time to do sth. it takes sb.some time that... Eg.: It took me a month to learn book 2. sb.spend some time doing sth. Eg.:I spent a month learning English. sb.spend some time on sth. 金钱上的花费 cost,pay for sth. than I expected [口语化]比我所预料的 The quesion is easier than I expected. You are greater than I expected. You are more beaufiful than I expected. You are better than I expected. than I thought 比我原以为的 The holiday took you longer than I expected. The English class took me longer than I thought. where it is/注意单纯连读 get on the bus 上车 get off the bus 下车 I will tell you where you can(should)get off. I will tell you where to get off 语法结构: 特殊疑问词 + to + 动词原型 可用来取代宾语从句 How can I get there? Can you tell me how I can get there? Can you tell me how to get there? Can you tell me how I should do? Can you tell me what to do? I don"t know which to choose. I wonder when to have a meeting. Exercise 1. Did you find out____the pie out of oven? A.to take B.have taken C.when to take D.pile up find out发现 pie 馅饼 oven 火炉 take sth.out of 取出来 Answer : C Did you find out when we could (can) take the pie out of oven? in the front of/in front of the 特指,范围 in the front of 前者属于后者的范围 in front of 前者不属于后者的范围 The teacher stands in the front of the classroom. The teacher stands in front of the students. to 表目的 get a good view of...欣赏……的美景 I stood at the window to get a good view of the city. after some time = after a time looking round 现在分词或过去分词做状语,那么这个动作必然与主句主语相关 1.非谓语动词做状语,这个动作必然于主句主语相关; -ing 与主句主语构成主动关系 -ed 与主句主语构成被动关系 to do 与主句主语构成目的关系 2.如果非谓语动词做定语,只与被修饰词相关,与主语无关; passing plain 路过的飞机 ploughed field 耕过的地 3. 如果 -ing/-ed 做宾补,与宾语有关 I find the door locked. I realized with a shock that... I do sth.with an excitement. with+n. 表示状语 that 引导宾语从句 left 放在被修饰词之后 as far as we go 我们能够走的一样远 This is as far as I can do. as far as + 从句: 最大程度的,最大限度的 as far as we go = we couldn"t go any more. I can"t bear (it any more.) It was more than I oculd bear. This is as far as I bear. This is as far as I can understand. This is as far as I can afford. oh dear 欧,天呐 forget to do 忘记去做某事 forget doing 忘记已经做了什么事 I forget to shut the door. I forget shutting the door. put sb.off put off the meeting/put off the appointment 表示推迟,延期 put sb.off off adv. = remind sb.to do 表示提醒 put sb.off 推脱,敷衍 My son always asks me to take him up,I always put him off. We"re going back now.我们马上就要回去 in that case 如果那样的话 in this case 如果这样的话 prefer do do sth. 宁可做某事 prefer to do...rather than...宁可.也不... 总结: love doing/like doing 喜欢做某事 sth.take sb.some time 花费时间做某事 It takes sb.some time to do sth./It take sb.some time that... than I expected 比预料的…… as far as + 句子:表示最大限度的,最大程度的 1. 非谓语动词做状语,这个动作必然与主句主语有关; -ing与主句主语构成主动关系 -ed 与主句主语构成被动关系 to do 与主句主语构成目的关系 2. 如果非谓语动词做宾语,只与被修饰词相关,与主语无关; passing plane 路过的飞机 ploughed field 耕过的地 3. 如果-ing/-ed做宾补,与宾语有关 语法结构:特殊疑问词 + to + 动词原型 可用来取代宾语从句 How can I get there? Can you tell me how I can get there? Can you tell me how to get there? Can you tell me how to begin a letter? in that case 如果那样的话 in this case 如果这样的话 累!加油哦!
2023-08-07 02:50:271

有哪位大侠知道日本多次签证的备注栏有GT CONDUCTOR是什么意思啊?多谢!

这个是领队专用签证。日本签证类别划分的很细,领队带团去日本,需要专门的签证,不像美国、申根那样用个人旅游签证也行的。领队不能用日本的个人旅游签证带团去。
2023-08-07 02:50:341

约翰·巴里的作品年表

参与的电影:《 James Bond"s Greatest Hits 》 (2006) ...Himself《马达加斯加/狂野大自然 Madagascar 》 (2005) ...composer: theme Born Free《 Dances with Wolves: The Creation of an Epic 》 (2003) ...《 Dances with Wolves: The Creation of an Epic 》 (2003) ...Himself《 James Bond: A BAFTA Tribute 》 (2002) ...Himself《 The Making of "Zulu": Roll of Honour 》 (2002) ...《 Best Ever Bond 》 (2002) ...Himself《 Andere tijden de vergeten James Bond 》 (2002) ...composer: theme music (uncredited)《 Party at the Palace: The Queen"s Concerts, Buckingham Palace 》 (2002) ...(song Goldfinger)《 The Making of "Zulu":...and Snappeth the Spear in Sunder 》 (2002) ...《 Party at the Palace: The Queen"s Concerts, Buckingham Palace 》 (2002) ...composer: song Goldfinger《拦截密码战 Enigma 》 (2001) ...《拦截密码战 Enigma 》 (2001) ...conductor《 The Real Shirley Bassey 》 (2001) ...Himself (interviewee)《 Elizabeth Taylor: A Musical Celebration 》 (2000) ...Himself《 Back to "Somewhere in Time" 》 (2000) ...Himself《 The Music of James Bond 》 (2000) ...Himself《 A Song of Africa 》 (2000) ...《 Inside "From Russia with Love" 》 (2000) ...Himself《 Cubby Broccoli: The Man Behind Bond 》 (2000) ...《 The Music of James Bond 》 (2000) ...still photos provided by《 Back to "Somewhere in Time" 》 (2000) ...《 Harry Saltzman: Showman 》 (2000) ...Himself《 Inside "Diamonds Are Forever" 》 (2000) ...Himself《 A Song of Africa 》 (2000) ...Himself《 John Barry: Licence to Thrill 》 (2000) ...Himself《随心所欲/从心所爱 Playing by Heart 》 (1998) ...《终极密码战 Mercury Rising 》 (1998) ...《终极密码战 Mercury Rising 》 (1998) ...conductor《碧海奇缘 Swept from the Sea 》 (1997) ...《穿越时间之海 Across the Sea of Time 》 (1995) ...《哭泣的大地 Cry, the Beloved Country 》 (1995) ...《真爱一生 Scarlet Letter, The 》 (1995) ...《真爱一生 Scarlet Letter, The 》 (1995) ...conductor《炸弹专家/魔鬼专家/炮弹专家 Specialist, The 》 (1994) ...conductor《炸弹专家/魔鬼专家/炮弹专家 Specialist, The 》 (1994) ...《情深到来生 My Life 》 (1993) ...《桃色交易 Indecent Proposal 》 (1993) ...《桃色交易 Indecent Proposal 》 (1993) ...conductor《第63届奥斯卡金像奖颁奖典礼 63rd Annual Academy Awards, The 》 (1991) ...Himself - Best Score Winner《与狼共舞 Dances with Wolves 》 (1990) ...conductor《与狼共舞 Dances with Wolves 》 (1990) ...《化装舞会 Masquerade 》 (1988) ...《007系列:黎明杀机 Living Daylights, The 》 (1987) ...Orchestra Conductor (uncredited)《007系列:黎明杀机 Living Daylights, The 》 (1987) ...《007系列:黎明杀机 Living Daylights, The 》 (1987) ...conductor《 Hearts of Fire 》 (1987) ...《天降神兵 Howard the Duck 》 (1986) ...《金童子 Golden Child, The 》 (1986) ...(songs)《佩姬苏要出嫁/时光倒流未嫁时/帕姬·苏结婚了 Peggy Sue Got Married 》 (1986) ...conductor《佩姬苏要出嫁/时光倒流未嫁时/帕姬·苏结婚了 Peggy Sue Got Married 》 (1986) ...《雷霆杀机/铁金刚勇战大狂魔 View to a Kill, A 》 (1985) ...《雷霆杀机/铁金刚勇战大狂魔 View to a Kill, A 》 (1985) ...conductor《走出非洲/远离非洲/非洲之旅 Out of Africa 》 (1985) ...《走出非洲/远离非洲/非洲之旅 Out of Africa 》 (1985) ...conductor《血网边缘 Jagged Edge 》 (1985) ...conductor《血网边缘 Jagged Edge 》 (1985) ...《直到九月 Until September 》 (1984) ...《棉花俱乐部 Cotton Club, The 》 (1984) ...《棉花俱乐部 Cotton Club, The 》 (1984) ...music supervisor《危险的情人 Mike"s Murder 》 (1984) ...《金海豹 Golden Seal, The 》 (1983) ...《东游记 High Road to China 》 (1983) ...《007系列:八爪女 Octopussy 》 (1983) ...《007系列:八爪女 Octopussy 》 (1983) ...conductor《搞(口野)神探汉密特 Hammett 》 (1982) ...《搞(口野)神探汉密特 Hammett 》 (1982) ...conductor《大审判 Verdict, The 》 (1982) ...(from Lion in Winter, The (1968))《红伶劫 Frances 》 (1982) ...《体热 Body Heat 》 (1981) ...conductor《体热 Body Heat 》 (1981) ...《血盟兄弟 Legend of the Lone Ranger, The 》 (1981) ...《真正朋友 Inside Moves 》 (1980) ...《恩深情更深 Touched by Love 》 (1980) ...《冲出地狱海 Raise the Titanic 》 (1980) ...《时光倒流七十年 Somewhere in Time 》 (1980) ...conductor《 Murder by Phone 》 (1980) ...《师弟出马 Shi di chu ma 》 (1980) ...(uncredited) (Chinese version)《迷离夜合花 Night Games 》 (1980) ...《时光倒流七十年 Somewhere in Time 》 (1980) ...《 Corn Is Green, The 》 (1979) ...《007之登月计划 Moonraker 》 (1979) ...《汉诺瓦街 Hanover Street 》 (1979) ...《黑洞 Black Hole, The 》 (1979) ...《 Starcrash 》 (1979) ...《死亡游戏 Game of Death 》 (1978) ...《死亡游戏 Game of Death 》 (1978) ...music producer (uncredited)《贝丝 Betsy, The 》 (1978) ...《第一次性接触 First Love 》 (1977) ...《肯尼迪--失落的英雄 Young Joe, the Forgotten Kennedy 》 (1977) ...《深深深 Deep, The 》 (1977) ...《 Eleanor and Franklin: The White House Years 》 (1977) ...《合家欢 Gathering, The 》 (1977) ...《 White Buffalo, The 》 (1977) ...《铁金刚大战女魔星 Sporting Chance 》 (1976) ...(The Persuaders theme)《金刚 King Kong 》 (1976) ...conductor《金刚 King Kong 》 (1976) ...《罗宾汉与玛莉安 Robin and Marian 》 (1976) ...《蝗虫之日 Day of the Locust, The 》 (1975) ...conductor《蝗虫之日 Day of the Locust, The 》 (1975) ...《废墟中的爱情 Love Among the Ruins 》 (1975) ...《勇气 Dove, The 》 (1974) ...《铁金刚大战金枪客 Man with the Golden Gun, The 》 (1974) ...《铁金刚大战金枪客 Man with the Golden Gun, The 》 (1974) ...music arranger《激情 Tamarind Seed, The 》 (1974) ...conductor《激情 Tamarind Seed, The 》 (1974) ...《傀儡家庭 Doll"s House, A 》 (1973) ...《玻璃动物园 Glass Menagerie, The 》 (1973) ...《猛龙过江 The Way of the Dragon》 (1972) ...(uncredited)《爱丽斯漫游仙境 Alice"s Adventures in Wonderland 》 (1972) ...《与我同行 Follow Me! 》 (1972) ...《与我同行 Follow Me! 》 (1972) ...conductor《英宫恨 Mary, Queen of Scots 》 (1971) ...《小姐弟荒原历险 Walkabout 》 (1971) ...《大风云 Last Valley, The 》 (1971) ...conductor《大风云 Last Valley, The 》 (1971) ...《007系列:永远的钻石 Diamonds Are Forever 》 (1971) ...music arranger《007系列:永远的钻石 Diamonds Are Forever 》 (1971) ...《新战海浮生 Murphy"s War 》 (1971) ...(main themes)《 They Might Be Giants 》 (1971) ...《 The Persuaders! 》 (1971) ...composer: theme music (24 episodes, 1971-1972)《 Monte Walsh 》 (1970) ...《午夜牛郎 Midnight Cowboy 》 (1969) ...《午夜牛郎 Midnight Cowboy 》 (1969) ...music supervisor《 Appointment, The 》 (1969) ...(theme: foreign version)《女皇密使 On Her Majesty"s Secret Service 》 (1969) ...《女皇密使 On Her Majesty"s Secret Service 》 (1969) ...music arranger《冬狮 Lion in Winter, The 》 (1968) ...《冬狮 Lion in Winter, The 》 (1968) ...conductor《富贵浮云 Boom 》 (1968) ...《 Deadfall 》 (1968) ...Symphony Conductor《 Deadfall 》 (1968) ...《芳菲何处 Petulia 》 (1968) ...《芳菲何处 Petulia 》 (1968) ...conductor《疯狂世家 Whisperers, The 》 (1967) ...《007系列:雷霆谷 You Only Live Twice 》 (1967) ...《007系列:雷霆谷 You Only Live Twice 》 (1967) ...music arranger《凯德警长 Chase, The 》 (1966) ...《凯德警长 Chase, The 》 (1966) ...conductor《谍海群英会 Quiller Memorandum, The 》 (1966) ...conductor《谍海群英会 Quiller Memorandum, The 》 (1966) ...《狮子与我 Born Free 》 (1966) ...《 Wrong Box, The 》 (1966) ...《诀窍 Knack, The 》 (1965) ...《黑狱枭雄 King Rat 》 (1965) ...《雷霆万钧 Thunderball 》 (1965) ...conductor《雷霆万钧 Thunderball 》 (1965) ...《伊普克雷斯档案 Ipcress File, The 》 (1965) ...
2023-08-07 02:50:531

精简一下英语短文(七年级)!!!

最简单了已经。。。。。。
2023-08-07 02:51:074

假如你是家庭卫生大扫除的小指挥,你准备怎样做,用5句话简要描述一下英语作文

I am a general cleaning small conductor我是个大扫除小指挥I am a general cleaning small conductor.我是一个大扫除小指挥.I like house to be cleaned.我喜欢我的家时刻都是干净的.I don"t like my house to be dirty.我不喜欢我的家里很脏.If I saw some places very dirty,I will not very comforable.如果我看见一些地方非常的脏,我将会非常的不舒服.(头皮发麻)In my house gereral cleaning,perhaps I am a conductor for cleaning the house.在我的家里,我是一个喜欢大扫除的人,我喜欢家里的每一处都是干净的.I told my mother cleaning the some dirty corner,and tidied my locker.我告诉我的母亲让我家里的一些角落显得很干净,并且我也会自己整理自己的橱.When I saw every place to be cleaned,I will very comfortable.当我看见每一处都是干净才舒服
2023-08-07 02:51:172

请问ul 1007 22号线 能允许通过的最大电流是多少 有没有一个大概估算的方法

UL1007电子线,电器内部配线,定电压300V,温度范围:-30度-+80度,导体:单股或多股绞合裸铜或镀锡铜线导体,绝缘体:PVC(聚氯乙烯)导体大小从32AWG-16AWG 导体截面积从0.03平方到1.3平方,具体电流3A左右,这个没有一个估算方法。但有些电流、线规对应表格可以作为参考。
2023-08-07 02:51:264

what use is a conductor

这里是一个句式:a is to b what c is to d.
2023-08-07 02:51:341

小学英语阅读~求答案和每一题的过程

很难 不会
2023-08-07 02:51:456

安全用电英语作文70词

There were so many people died of electricity,so we should use the electricity very carefully,it is really dangerous if you do not take care about the electricity.First,we should know which things are conductor,and be careful of the conductor when you near from electricity,the bodies of people are also a conductor,and including water,we mustn"t touch the bnc connector plugs(插销) when our hands are wet,and do not touch the electrical wire when it broken,it is important to take care of our life from electricity,that"s all we should know.Or we could learn more about the safety of electricity.
2023-08-07 02:51:591

电流互感器的倍率怎么算?Primary 400A 5/3.75/VA Conductor 1T class0.5 Secondary 5A 50/60HZ 660V

400/5=80倍
2023-08-07 02:52:104