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求n维凸包与求线性相关性，凸表示，分析算法复杂度？

https://en.wikipedia.org/wiki/Directed_set with the additional property that every pair of elements has an upper bound. why every pair has an upper bound not every element has an upper bound?

https://en.wikipedia.org/wiki/Net_(mathematics)

https://libgen.pm/

[27] Duhamel, P. and Hollmann, H., Split-radix FFT algorithm, Electron. Lett., 20(1), 14–16, 5 January 1984.

https://en.wikipedia.org/wiki/Lagrange_polynomial

https://en.cppreference.com/w/cpp/language/move_constructor class-name ( cv class-name && ) (1) (since C++11) class-name ( class-name && ) = default; (2) (since C++11) class-name ( cv class-name && ) = delete; (3) (since C++11)

why second constructor do not require cv specifier?

https://en.cppreference.com/w/cpp/language/direct_initialization braced-init-lists

https://en.cppreference.com/w/cpp/language/aggregate_initialization Aggregate initialization

1#yHbj53

man 3 printf following n conversion corresponds to a pointer ?

man 3 stdarg

/etc/network/interfaces /etc/network/interfaces.d/eth0 sudo /etc/init.d/networking restart

play -n -c1 synth sin %-12 sin %-9 sin %-5 sin %-2 fade q 0.1 1 0.1 plays a synthesised 'A minor seventh' chord with a pipe-organ sound,

C++ type_trait是干什么用的？

audacity Signal读值为什么会是负的呢？

Audacity pitch tempo speed, sox ?

服务器启动，slave端什么时候下载下来的？

Nyquist Shannon 采样定理

change pitch tempo speed

QT lingusist 怎么用的?

-platform linuxfb

为什么通过python 启动和直接启动有区别 一个停在No Image 一个是摄像头 为什么需要sudo来启wmcam_slave_v2 Working Thread processDetectLFI时为什么需要QMutexLocker FloatingForm是干什么用的，用在哪里 Forminformation.ui的上标0.001是怎么打出来的

-lopencv_wechat_qrcode -lopencv_barcode

barCode 定位

batcode.cpp 132 ------- std::vectorstd::string qr_codes = qr_detector->detectAndDecode(image, qr_points);

F:\wmcamv2_src_2023.01.03\wmcamv2\modules\algorithms\util.cpp:238

F:\wmcamv2_src_2023.01.03\wmcamv2\apps\wmcam_slave_v2\workthread.cpp:78

/usr/local/include/opencv4/opencv2/wechat_qrcode.hpp:36

cv::wechat_qrcode::WeChatQRCode std::vectorcv::Mat qr_points; std::vectorstd::string qr_codes = qr_detector->detectAndDecode(image, qr_points);

返回的4个点在Mat[0][0] mat[0][1] mat[1][0] mat[1][1]上?

为什么一次二维码开始会检测4次 ----------------------------------0----------------------------------------- decode-1: 61: https://logistics-mrd.jd.com/cmail?deliveryId=JDX002089769870 ----------------------------------1----------------------------------------- decode-1: 61: https://logistics-mrd.jd.com/cmail?deliveryId=JDX002089769870 ----------------------------------1----------------------------------------- decode-1: 61: https://logistics-mrd.jd.com/cmail?deliveryId=JDX002089769870

样机是如何采样的15帧每秒

为什么会连续收到IDLE信号？ (((((((((((((((((((((((((0)))))))))))))))))))))) (((((((((((((((((((((((((0)))))))))))))))))))))) (((((((((((((((((((((((((0)))))))))))))))))))))) (((((((((((((((((((((((((0)))))))))))))))))))))) (((((((((((((((((((((((((0)))))))))))))))))))))) (((((((((((((((((((((((((0)))))))))))))))))))))) (((((((((((((((((((((((((0))))))))))))))))))))))

-------------------------Time elapsed: 128 ms decode-1: 61: https://logistics-mrd.jd.com/cmail?deliveryId=JDX002089769870 ----------------------------------1----------------------------------------- -------------------------Time elapsed: 84 ms decode-1: 61: https://logistics-mrd.jd.com/cmail?deliveryId=JDX002089769870 ----------------------------------1----------------------------------------- -------------------------Time elapsed: 98 ms decode-1: 61: https://logistics-mrd.jd.com/cmail?deliveryId=JDX002089769870