- Видео 45
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타블렛깎는노인
Добавлен 7 окт 2011
Видео
parabola grid curves
Просмотров 454 года назад
two different parametrizations, but the same image (surface)
one example of an elementary region in 3D
Просмотров 345 лет назад
the elementary region in the clip = {(x, y, z) | 0 ≤ x ≤ 1, 0 ≤ y ≤ x, x^2 y^2 ≤ z ≤ 2} Can you calculate the volume of the solid? You will get 2/3 by the triple integral.
Volume approximation by Riemann sums
Просмотров 1225 лет назад
f(x,y) = 16 - x^2 - 2y^2 over R: [0,2] x [0,2] The volume under graph f is approximated by Riemann sums. If the R is partitioned into infinite sub-rectangles, the limit of Riemann sum converges to the double integral of f over R. Matplotlib is used for the visualization
hypocycloid
Просмотров 255 лет назад
a hypocycloid, showing that it is not regular at four corner points though it is of class C1.
visualization of the Lagrange multiplier method
Просмотров 1,2 тыс.5 лет назад
f(x,y) = 0.5x^2 0.5*y^2 a constraint S: g(x,y) = 0.5x^2 y^2 = 1 (ellipse) as the constraint is closed and bounded, f | S must attain both an absolute maximum and minimum. in terms of geometry, grad f is perpendicular to grad g at the critical points of f | S.
an open constraint
Просмотров 355 лет назад
f(x, y) = x^2 - y^2 3 the open constraint: { (x,y) | x^3 - y 1 = 0 } How to calculate the extrema? Apply the Lagrange multiplier method ! The visualization was done by matplotlib. Will look into mayavi later for better 3D visualization.
strange path
Просмотров 195 лет назад
path c(t) = ( t sin(t*2*sin(t/2)), sin(2*t)-cos(t) ), t = [1, 5] for fun by matplotlib
circle by path
Просмотров 245 лет назад
path c(t) = (cos t, sin t) makes the circle curve by matplotlib
simple path example
Просмотров 165 лет назад
path c(t) = (t, t^2) the curve traced out by c coincides with the graph f(x) = x^2 visualized by matplotlib
complex eigenvalue geometric interpretation [2x2 real matrix]
Просмотров 5635 лет назад
complex eigenvalue geometric interpretation [2x2 real matrix]
diy 4k projector with diy edgless screen
Просмотров 8 тыс.5 лет назад
diy 4k projector with diy edgless screen
4k diy projector with diy edgeless screen test
Просмотров 3535 лет назад
4k diy projector with diy edgeless screen test
4k diy projector with diy edgless screen test
Просмотров 3655 лет назад
4k diy projector with diy edgless screen test
근데 PTZ630에 레티나 액정을 다신건가요?
도대체 이 영상은 언제 올라온 영상이길래 달린 댓글들이랑 게시일 날짜가 안 맞는거지?
핵신기해욥 😊
후 어려워요
귀엽네요 엄청
어렵다
언어의정원 rain 인생에서 제일 좋아하는 노래인데 허허 여기서 보니 반갑네용
Awesome, thanks a lot!
심쿵사..(크어억...)
정말 맛있어보이네요
존경합니다 타블렛깎는노인이여!
Hi, what setup did you use this time?
Hi, please take a look my instruction www.instructables.com/id/DIY-130-Inch-Edgeless-Screen-With-Ambilight-by-Tee/
Be great to see a video of how it was made from start to finish. Great idea and execution.
maybe next time. at that time i didnt consider it. thx for the idea
How thick is the acrylic that you used on the projector? 4mm? 6 mm?
most of them 5mm. detailed instructions are here www.instructables.com/howto/4k+beam/
Will it now get UHD in 10.1 inches without visual problems?
actually yes. but i use 12.5" instead of 10.1. 10.1 turns out to have a critical issue when building a diy projector. it shows dark foggy screen near its center. any kind of method couldnt resolve it. while u may have little blurry at edges, but no problem with uhd exprerience. 12.5" 4k diy projector is my daily one. i dont remember whether i wrote down how to build it in english. anyway, it uses same components of the 10.1 build (u can search in instructables or my blog).
@@타블렛깎는노인 I am aware of the issues you faced with 10.1. I have followed his blog for some years since I met the 4k projector project. It is likely that I use the 12-inch screen, even so I am evaluating alternatives, some 5.5 from Sharp and AUO "www.panelook.com/modelsearch.php?op=advancedsearch&order=panel_id&product_composition=20&inch_high=1210&resolution_pixels=8300&ppi_low=500" Or some between 9.8 and 12 inches www.panelook.com/modelsearch.php?op=advancedsearch&order=panel_id&inch_low=550&inch_high=1300&resolution_pixels=8720 My big question is focus, I've already used one with a low focus, and it bothered me a lot. Today I have almost all the necessary parts less the screen, I am just making the choices calmly (In Brazil, imports have taxes between 60% and 100%, and take months for deliveries, wrong choices are expensive)
@@BrunoTorrente Boa tarde... ja comprou algo??? use frete epacked se comprar no aliexpress... é mais caro de cara mas não para na taxa dos 15,00 e vem bem mais rapido... ja escolheu seus materiais??? tem lcd 5.5 pol de 2k com controladora por 60 doletas ... led pelo que vi tem que ser de 120w ou mais se usar no escuro se for no claro mais de 200w ...
@@takeomarcio Sim comprei algumas pecas, incluindo led 300w ( aprox 27 mil lumens real) estou esperando um dinheiro para pegar o LCD e controladora agora. Estou montando 4k 12 polegadas
@@takeomarcio Depois me manda seu contato para conversarmos melhor caso
하위^^
안녕하세요 저도 만들어보고싶은데 조언좀 해주세요
m.blog.naver.com/bumhee34/220646787924 제 블로그에 설명 있습니다
@@타블렛깎는노인 고맙습니다 ^^
@@타블렛깎는노인 선생님 , 한가지 더 조언 구하고 싶습니다 ruclips.net/video/AGbfaadASVk/видео.html 매직미러 계획중입니다 위의 링크와 비슷한 lcd 터치패널을 저렴하게 구입하는 방법을 혹시 알고 계실까요?
@@user-cg1my3cz2e 간단한 매직미러는 제 블로그에 있습니다. 매직미러는 사실 별건없고 스크린앞에 있는 투과거울만 중요한겁니다. 그 스크린자체에 기능을 어떻게 넣을거냐 터치를 넣을거냐 음성인식을 넣을거냐는 본인의 재량에 달린 문제같습니다
@@user-cg1my3cz2e 아 댓글을 끝까지 못봤네요. taobao를 통해서 사는게 제일 쌉니다
If i understand correctly you are "forced" to use a 12,5" screen, because you couldn't find a smaller one ? Did you try those 5.5" available now ? Like this one : www.aliexpress.com/item/2160-3840-5-5-inch-4k-LCD-panel-module-LCD-screen-display-HDMI-MIPI-driver-board/32893566760.html Hope to see the perfect final version in near future, good luck.
How the leds are affecting the view ? Is the picture more vivid or washed ?
washed obviously. This is just for showing off :) I don't have this anymore
And with your led... is the radiator is ok ?
Your led's are emitting way to low in comparison with the screen size itself ;) 90,000 Lumens will be enough ^^
안녕하세요 혹시 아두이노 음성인식 도어락 제작에 대해 문의드리고싶습니다
can you press in the screen normal ??
Not bad, why did you buy the 10.1 4k?
Do you know if somebody is selling the box to put all the parts in? That would be so much easier. Also, have you tried using R.G.B color filters before the LCD to boost contrast, LED doesn't work the same as a normal bulb it doesn't have IR light, since you have an open project box you could try some colored light with the bright LED? Thanks!
wow quite great. Do you have the name for your new led ? And was it really much more brigter than your previous one ? thanks
Will this work with The Intuos Pro series?
Is this DIY projector?
Ei amigo, como você resolveu o problema do jitter?
I know its been a bit but could you lend a hand with the coding? I've got mine setup with 260leds and have it running, but the last 6 or so LED's show nothing.
음성으로 되는건가요?
늦은 답변이지만 그렇습니다.
What model LEDs did you use?
Hey my friend! You did a great job building this kind of projector. Will you please publish all of the steps in English? Thank you in advance!
Video published in 2019 but your comment is two years old? Strange youtube
oh my god. when it breathes fire, I feel like it's coming out of the screen. it's awesome!!
Dude this looks so freakn sick! im fuqn jealous!!
How does it affect the watching experience? I would imagine that it could distract me from the video itself. What's your hands-on impression?
very impressive! what microphone did you use?
Nice! I started to look into digital arts a few months ago, bought a Huion H610, It works nice but I wanted something with a screen, but the prices are just too me. This seems to be a nice option. Thank you for this!:)