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美股很高!但这3支股票还在地上趴着,可以买入

美股很高!但这3支股票还在地上趴着,可以买入

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61 2026-05-16
Which AI Image Generator Should You Actually Use?

Which AI Image Generator Should You Actually Use?

Best AI Image Generator - Midjourney vs GPT Image 2 vs Nano Banana 2 Try All AI Image Generators 👉 https://higgsfield.ai?fpr=dankieft&fp_sid=image Everyone wants to know which AI image generator is actually the best right now. In this video, we are throwing the top three into the ring: GPT-Image 2, Nano Banana Pro, and Midjourney 8.1. We already have a general idea of what they do well. GPT is amazing with text, Nano Banana Pro is a fantastic all around workhorse, and Midjourney is the king of art styles. This video is an open test to prove it. We are going to see exactly how each tool handles really difficult prompts. To make it super easy for Dan to view and compare the results instantly on camera, we are putting all the generated images side by side in a Figma board. No confusing numbered scores, just real results. Join my FREE community where you can find my prompts & chat about AI 👉 https://www.skool.com/nextgenai 📧 For business inquiries: business@dankieft.com Follow me on Instagram: https://www.instagram.com/dan.kieft/ Timestamps: 00:00 Intro 01:14 GPT Image 2 Walkthrough 02:37 Nano Banana 2 Walkthrough 03:30 Midjourney Walkthrough 05:10 prompting techniques 05:50 Realism Comparison 13:15 consistency comparison 16:15 Image editing comparison 20:19 Cinematic comparison 21:30 Fantasy comparison 22:46 Animation comparison 23:45 Graphic design comparson 27:54 Intelligence test comparison 29:22 Verdict: which AI Image Generator should you use?

273 2026-05-12
0511 深度學習

0511 深度學習

【課程段落】: 00:00 RNN結構回顧 - 說明循環網路基本架構 05:20 權重矩陣定義 - 介紹W_XH W_HY W_HH 11:10 隱藏層回饋 - 前一狀態形成記憶 17:30 時間展開表示 - 沿時間攤開RNN運算 24:00 歷史相依性 - 當前輸出受過去影響 30:40 BPTT訓練 - 透過時間反向傳播 37:20 Softmax分類 - 輸出類別機率 42:50 Cross Entropy - 計算分類損失 49:10 梯度累積 - 彙整各時間步影響 55:40 Truncated BPTT - 限制回看序列長度 01:03:00 START與END - 標記序列開頭結尾 01:09:20 Bi-directional RNN - 同時看前後文 01:16:40 雙向輸出整合 - 合併正向反向狀態 01:23:10 梯度不穩問題 - 消失與爆炸需處理 01:29:40 Gradient Clipping - 限制梯度更新幅度 01:36:20 Layer Normalization - RNN較適合層正規化 01:44:00 ESN概念 - 固定隱藏層只訓練輸出 01:51:10 Spectral Radius - 控制回饋矩陣穩定 01:58:40 Sparse Reservoir - 稀疏連接降低複雜度 02:05:20 LSTM前言 - 解決長期依賴問題 02:12:30 LSTM輸入輸出 - 隱藏狀態與記憶狀態 02:20:10 Forget Gate - 決定保留舊記憶 02:27:30 Input Gate - 決定寫入新資訊 02:34:20 Cell Candidate - 產生候選記憶內容 02:41:00 Output Gate - 決定輸出隱藏狀態 02:48:10 LSTM狀態更新 - 結合長短期資訊 02:55:00 矩陣維度整理 - 多層RNN與LSTM參數 03:01:20 考試與練習 - 預測資料與ESN設計 【課程重點整理】: 本集課程深入說明RNN的結構、訓練方式與進階模型,包含BPTT、雙向RNN、Gradient Clipping、Layer Normalization、Echo State Network與LSTM。 RNN的核心是隱藏層具有回饋連接。一般前饋網路只看當前輸入,但RNN會把前一時間點的隱藏狀態帶入目前運算,因此能保留歷史資訊。這讓RNN特別適合時間序列、語音、文字、手寫辨識與預測問題。 訓練RNN時使用BPTT,也就是把RNN沿著時間展開,再對所有時間步的損失進行反向傳播。若序列太長,完整回傳會造成計算量太大,因此常使用Truncated BPTT,只回看固定長度或以句子為單位切段。 RNN常遇到梯度消失與梯度爆炸,因此需要Gradient Clipping限制梯度大小。由於序列長度不固定,Batch Normalization不太適合RNN,課程中特別強調Layer Normalization,因為它在單一時間點、單一層內做正規化,更適合序列模型。 Echo State Network是一種降低訓練難度的方法。它將輸入到隱藏層與隱藏層回饋權重隨機設定並固定,只訓練最後輸出層,同時透過Spectral Radius控制系統穩定性。 LSTM是本集最重要的進階模型。它透過Forget Gate、Input Gate、Cell Candidate與Output Gate控制資訊的保留、寫入與輸出,解決傳統RNN難以學到長期依賴的問題。我的理解是,RNN提供了序列記憶的基本能力,而LSTM則進一步讓模型學會「什麼該忘、什麼該記、什麼該輸出」,這是處理長序列資料的關鍵。 【本集關鍵字重點】: 【RNN】:循環神經網路,利用前一時間點的隱藏狀態保存歷史資訊,適合處理序列資料。 【W_XH】:輸入層到隱藏層的權重矩陣。若輸入神經元數為D、隱藏神經元數為P,尺寸為P乘D。 【W_HY】:隱藏層到輸出層的權重矩陣。若輸出神經元數為O、隱藏神經元數為P,尺寸為O乘P。 【W_HH】:隱藏層到隱藏層的循環權重矩陣,尺寸為P乘P,用來把上一時間點的狀態傳到目前時間點。 【RNN公式參數】: x_t:第t個時間點的輸入資料。 h_t:第t個時間點的隱藏狀態。 h_t-1:前一時間點的隱藏狀態。 y_t:第t個時間點的輸出。 h_0:初始隱藏狀態。 W_XH:輸入到隱藏層權重。 W_HH:隱藏狀態回饋權重。 W_HY:隱藏層到輸出層權重。 【BPTT】:Backpropagation Through Time,透過時間反向傳播。將RNN沿時間展開後,計算各時間點對權重的梯度影響。 【Truncated BPTT】:截斷式時間反向傳播。只回傳固定長度或句子範圍,降低長序列訓練成本。 【Softmax】:將輸出轉成各類別機率,常用於序列分類或文字預測。 【Cross Entropy】:交叉熵損失,用來衡量正確類別機率是否足夠高。 【Softmax與損失參數】: p_tk:第t個時間點屬於第k類的預測機率。 j_t:第t個時間點的正確類別索引。 L:總損失,會加總各時間點的分類誤差。 【Bi-directional RNN】:雙向RNN,同時從前往後與從後往前讀取序列,能利用前後文提升辨識效果。 【Gradient Clipping】:梯度裁剪。限制梯度最大值或整體長度,避免梯度爆炸造成訓練不穩。 【Layer Normalization】:層正規化。在同一時間點的一層神經元內計算平均值與變異數,適合RNN與序列模型。 【Layer Normalization參數】: P:隱藏層神經元數。 a_ti:第t時間點第i個神經元的輸入總和。 mu_t:第t時間點該層平均值。 sigma_t平方:第t時間點該層變異數。 gamma:可學習縮放參數。 beta:可學習平移參數。 【Echo State Network】:回聲狀態網路。固定隨機隱藏層權重,只訓練輸出層,降低RNN訓練難度。 【Spectral Radius】:譜半徑,通常指W_HH最大特徵值的絕對值。ESN中常調整到接近1,以維持穩定動態。 【Sparse Reservoir】:稀疏儲備池。讓W_HH中許多權重為0,降低複雜度並增加動態多樣性。 【LSTM】:長短期記憶網路,透過記憶狀態與多個閘門解決長期依賴問題。 【LSTM參數】: h_t-1:前一時間點隱藏狀態。 c_t-1:前一時間點記憶狀態。 h_t:目前隱藏狀態。 c_t:目前記憶狀態。 f_t:Forget Gate,控制舊記憶保留比例。 i_t:Input Gate,控制新資訊寫入比例。 c_tilde_t:候選記憶內容。 o_t:Output Gate,控制輸出內容。 sigmoid:輸出0到1之間,用來當作保留比例。 tanh:將候選資訊壓到穩定範圍。 odot:逐元素相乘。 【LSTM公式文字表示】: c_t等於f_t乘以c_t-1,加上i_t乘以c_tilde_t。 h_t等於o_t乘以tanh作用後的c_t。 意思是先決定保留多少舊記憶,再加入多少新記憶,最後決定要輸出多少內容。 【本集重點練習】: 畫出RNN基本架構,標示W_XH、W_HH、W_HY、x_t、h_t與y_t。 用自己的話解釋為什麼RNN能保留歷史資訊。 將一段短句沿時間展開,練習理解BPTT的運作方式。 比較完整BPTT與Truncated BPTT,說明為何長序列需要截斷。 說明雙向RNN為何能在手寫辨識與翻譯中提升效果。 解釋Gradient Clipping如何避免梯度爆炸。 比較Batch Normalization與Layer Normalization,說明RNN為何較適合LN。 設計一個Echo State Network,固定W_XH與W_HH,只訓練輸出層。 寫出LSTM四個Gate的功能,說明Forget Gate與Input Gate差異。 使用一組預測資料練習RNN或LSTM,觀察長期依賴對結果的影響。

271 2026-05-12
Architecture Site Analysis – The Site Analysis Course for Beginners

Architecture Site Analysis – The Site Analysis Course for Beginners

Architecture site analysis might seem like a pointless task, but it is the first step to designing a great architectural project. Let us learn how to do an architecture site analysis. You know that site analysis is important for your architecture project. So, you go to site with some friends. You take a sketchbook, your laptop and a few other tools, ready to analyse the site. You arrive. Now what? You stand around and chat for an hour then go home with a simple observation of the site. You get on google maps, draw the sun path, guess which way the wind was coming from and call it a day. That is the extent of site analysis for a lot of us. Architecture site analysis might seem like a pointless task we do just to “tick the box”. But, as I have just discovered from my studio 7 project, it’s not only really helpful, but essential and the first step to building up a great sketch design and architecture project. If you complete a site analysis just to “tick the box” – you are setting yourself up for failure and leaving out a lot of key details that will help assist you in progressing your design forward. My name is Kyle. I am going to show you how to do a complete architecture site analysis that will form the foundation of your projects. As mentioned, I have just completed a site analysis for my studio 7 project. This was a task set out for the course, the first assessment being a site analysis. I think the assessment was structured extremely well. It was structured linearly, as in a step-by-step process that you can replicate for any project. The first step of site analysis is about finding the limitations to the site, for example, the sun that goes in a set direction. These are the constraints. The things you cannot change that you need to work around or work with. That is really important. Because after you find all the limitations and constraints, the next step is finding how you can take some of those aspects and use them to initiate some design ideas. We call these the “site moves”. The site moves are built upon from the initial site analysis. You are taking 2-3 key limitations about the site and using them to come up with small design ideas that you can implement to the site. The third step to site analysis is spatially organising the programs set out in the brief. What are the spaces required by the client? How do they connect to each other physically, visually and audibly? This step involves diagramming the programs in relation to each other using a mind map. To take it a step further, you can overlay this map over the top of your site in a plan drawing. This will help you understand where the different programs will go in relation to each other, but on the actual site. The final step to site analysis is finding precedents that can influence your design. This is similar to the site moves step. It is not just an inspiration board or searching on pinterest. Find built projects that have previously been built and take as many key ideas you can away from them. Draw them out yourself and consider you can use them in your project. This might be materials, spatial strategies, little moments in the building that you like. And there you have it. That’s how you successfully start an architecture project by doing a complete site analysis. Good luck! Prefer listening/reading? Check out the show notes: https://successfularchistudent.com/architecture-site-analysis-guide/ Check out my FREE online course for architecture students: ▼ 70 Hacks for Architecture Students▼ → https://successfularchistudent.com/ ←

308 2026-05-11
これからの未来に必要な教育とは?: Tomohisa Ote at TEDxSaku

これからの未来に必要な教育とは?: Tomohisa Ote at TEDxSaku

大手智之さんのトークです。長野県佐久市で2014年5月に開催されたTEDxSakuにて。 株式会社アソビズム代表取締役CEO タイトル: これからの未来に必要な教育とは? 紹介文: 1974年、群馬県高崎市生まれ。 8歳の時に父親のパソコンでプログラミングと出会い、 兄弟・友人が喜ぶのが嬉しくてゲーム作りにのめり込む。 2002年、勤めていたゲーム会社から独立し、株式会社アソビズムを設立。 現在65名の従業員とともにゲームの企画・開発等を行っている。 秋葉原にある本社オフィスは「第25回日経ニューオフィス推進賞」を受賞。 設立当初から新しいワークスタイルを模索している。 2012年、娘の幼稚園選びを機に長野への移住を決意。 翌年2013年に長野支社、愛称「長野ブランチ」を設立した。 現在のオフィスは長野駅近郊にある古い旅館をリノベーションしたもの。 将来的には自然豊かな北信州へ移転し、子どもの教育と仕事が両立できる環境を作ることを目指している。 また、長野ブランチ2階の和室で「未来工作ゼミ」を開催。 子どもたちに、ゲーム作りを通してICTを教えたり、ロボット工作を一緒に行うなどして、 「大自然の中で心を開き、自分で考え、楽しみ、生きる力を育てる」ことにも取り組んでいる。 株式会社アソビズム http://www.asobism.co.jp In the spirit of ideas worth spreading, TEDx is a program of local, self-organized events that bring people together to share a TED-like experience. At a TEDx event, TEDTalks video and live speakers combine to spark deep discussion and connection in a small group. These local, self-organized events are branded TEDx, where x = independently organized TED event. The TED Conference provides general guidance for the TEDx program, but individual TEDx events are self-organized.* (*Subject to certain rules and regulations)

319 2026-05-10
A Batalha de um Guerreiro | Filme Completo Dublado GRÁTIS | Filme de Ação | NetMovies

A Batalha de um Guerreiro | Filme Completo Dublado GRÁTIS | Filme de Ação | NetMovies

👉Inscreva-se no canal: https://www.youtube.com/netmovies?sub_confirmation=1 🤩​ Seja membro deste canal e ganhe benefícios: https://www.youtube.com/channel/UCK5RRQ3TdwAbbCWrtnXsN3Q/join ▶️ Você também pode gostar desses filmes: https://youtube.com/playlist?list=PLhQTgJ8wVv-nSjTi5jGdTyT_buM23l12o 💜​ Baixe já o aplicativo da Netmovies que está disponível para iOS e Android em seu celular ou Smart TVs: NetMovies - Filmes e Séries Uma plataforma exclusiva com mais de 3.000 filmes dublados e legendados com o máximo de qualidade e o melhor de tudo: É grátis! Tá esperando o quê? 🎥 𝙎𝙞𝙣𝙤𝙥𝙨𝙚: Om é um oficial de comando das forças especiais que perde a memória durante uma missão. Depois de se recuperar da amnésia, ele tem a missão de salvar a nação dos terroristas. Ao enfrentar os desafios que a missão apresenta, ele descobre uma verdade chocante sobre sua vida. 🎬 𝙉𝙤𝙢𝙚 𝙙𝙤 𝙁𝙞𝙡𝙢𝙚: A Batalha de um Guerreiro 𝙏𝙞́𝙩𝙪𝙡𝙤 𝙊𝙧𝙞𝙜𝙞𝙣𝙖𝙡: Rashtra Kavach On 𝙂𝙚̂𝙣𝙚𝙧𝙤: Ação 𝘾𝙡𝙖𝙨𝙨𝙞𝙛𝙞𝙘𝙖𝙘̧𝙖̃𝙤 𝙄𝙣𝙙𝙞𝙘𝙖𝙩𝙞𝙫𝙖: 16 anos 𝘿𝙞𝙧𝙚𝙘̧𝙖̃𝙤: Kapil Verma 𝙀𝙨𝙩𝙧𝙚𝙡𝙖𝙣𝙙𝙤: Petrosyan Armen | Vicky Arora | Amit Ghosh | Armen Greyg | Abudhar Al Hassan | Aditya Roy Kapur | Vikram Kochhar | Damian Singh Maan | Elnaaz Norouzi | Neeraj Pardeep Purohit | Mirko Quaini | Ashutosh Rana | Pururava Rao | Sunit Razdan | Sanjana Sanghi | Aarash Shah | Prachee Shah | Jackie Shroff | Nishant Taliyan | Bijou Thaangjam | Prakash Raj | Shubhangi Latkar 📲​ Estamos também no Facebook e Instagram! Facebook: https://www.facebook.com/netmovies Instagram: https://www.instagram.com/netmoviesbr 💬​Comente usando '@netmovies' no YouTube e nas redes sociais! Netmovies traz para você ótimos filmes online grátis. Os maiores lançamentos e sucessos dos últimos anos. São os melhores filmes dublados completos nos mais diversos gêneros, filmes de ação, filmes de aventura, filmes de drama, filmes de romance, filmes de suspense, filmes de terror e zumbi, filmes de luta, filmes de desenhos animados, filmes de comédia engraçado e comédia romântica, filmes gospel, filmes evangélicos, filmes de família, histórias de filmes baseadas em fatos reais, assim você pode assistir seus filmes dublados completos online em HD quando e onde desejar! #netmovies #filmegratis #filmecompleto #filmecompletodublado #filmedublado #filmegratis #filmeonline #filmeemportuguês #filmecompletodubladoemportuguês #filme ID: GMT.434983

495 2026-05-04
Air Midwest 5481 Crash Charlotte Airport Disaster

Air Midwest 5481 Crash Charlotte Airport Disaster

The Air Midwest Flight 5481 crash at Charlotte Airport unfolds as investigators discover fatal errors behind the disaster that killed everyone aboard the commuter plane moments after takeoff. 00:00:00 Air Midwest Flight 5481 Crashes at Charlotte Airport 00:11:31 Firefighters Battle the Inferno and Investigate Wreckage 00:22:02 Examining Wake Turbulence and Elevator Control Cables 00:31:31 Discovering Maintenance Errors and Improper Rigging 00:40:41 Weight and Balance Issues Lead to Recommendations 00:50:42 Southern Airways Flight 242 Encounters Severe Storm 01:00:39 Both Engines Fail and Emergency Landing Attempted 01:10:18 Flight 242 Crashes on Highway in New Hope 01:21:31 Investigating Engine Failure and Hail Damage 01:30:33 Missed Opportunities and Lessons from the Tragedy Welcome to Mayday: Air Disaster! This riveting series delves into the world's most catastrophic aviation accidents, uncovering the causes and consequences of each tragic event. Through expert analysis, compelling reenactments, and survivor testimonies, we explore how and why these disasters occurred. Join us as we investigate the crucial lessons learned from these incidents, aiming to make the skies safer for everyone. ✈️ Fascinated by aviation mysteries? Subscribe to Mayday Air Disaster for gripping air crash investigations, expert analyses, and the relentless pursuit of answers. 💥🔍 https://www.youtube.com/channel/UCeRxxz9ByOqdd8A-0iF_Idg?sub_confirmation=1 #MaydayAirDisaster #AirDisasters #AirCrash

513 2026-05-03
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