## 切换至Edge后如何找回Internet Explorer

HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\

{1FD49718-1D00-4B19-AF5F-070AF6D5D54C}

## 张教授在上海

BBC Radio 4的Rethink栏目在23号请来了Niall Ferguson，Francis Fukuyama（福山）还有Steve Hilton探讨疫情的影响。

## Writing Pix4D compatible tags into pictures

If you’re looking for a method to write camera pose information into JPG files so that it can be read by Pix4D, as shown in the below screenshot:

Here is how to do it with exiftool:

• First, you need a configuration file for exiftool. In the configuration file, you need the following content:
%Image::ExifTool::UserDefined = (
'Image::ExifTool::XMP::Main' => {
Camera=> {
SubDirectory => {
TagTable => 'Image::ExifTool::UserDefined::Camera',
},
},
},
);
%Image::ExifTool::UserDefined::Camera = (
GROUPS => { 0 => 'XMP', 1 => 'XMP-Camera', 2 => 'Other' },
NAMESPACE => { 'Camera' => 'http://ns.flyingfishtechs.com/Camera/1.0/' },
WRITABLE => 'string',
GPSXYAccuracy=> {},
GPSZAccuracy => {},
Pitch => {},
Roll=>{},
Yaw => {},
);
• Then you can using exiftool to add the information to any JPG file.
exiftool.exe -config config.min.cfg -Pitch="1.02" -Roll="2.03" -Pitch="3.04" original.jpg

If the command outputs: 1 image files updated. Then you’re done. Now the JPG file has the camera pose information encoded in. If you have more than 3 such pictures (only because Pix4D needs at least 3 pictures to work), you can see that Pix4D can get the data from the pictures.

The final twist, Pix4D displays Omega, Phi and Kappa instead of Pitch, Roll and Yaw. Basically, Pitch, Roll and Yaw are angles relative to the horizontal plane – orthogonal to the gravity while Omega, Phi and Kappa are related to earth. That means, with a fixed set of Pitch, Roll and Yaw, if you change your GPS location, you’ll get a different set Omega, Phi and Kappa. Personally I don’t see why should Pix4D use earth as the frame of reference instead of horizontal plane. Maybe just to hide the raw information in the pictures. Anyway, know you know how.

## AC-3 support gets back again in VLC for iOS

A year ago, VLC on iOS was forced to remove its support for AC3 codec. I found almost all my videos on iPad were muted.

Since then, I haven’t bothered to check other options. I don’t mind paying a few dollars but I’ve been using VLC since years on all of my computers and mobile phones. There’s simply no other comparable alternatives that works equally well on Windows, Linux, OS X as well as iOS.

Today, I opened VLC on my iPhone again and noticed that I can play my videos with sound again! I checked the official website for sure and got this:

The link on iTunes also confirmed this. However, nowhere did I find details how did the developers solved the patent issue. Let’s hope it’s fixed for good.

## 中国古诗文

• 在内容上，以原文为本。不要译文，基本没有注释。
• 在布局上，以内容为主，去除一切干扰因素。要求干净，大方。
• 各古诗文名家作者就是blog作者，既直观有趣，又方便组织。

1. 开发批量插入作者的功能——已完成；
2. 开发批量插入帖子的功能——已完成；
3. 建立分类目录：需要专业人员帮助。
4. 开发新的数据结构以存储传统计时方式：朝代，年号，年号纪年，公元纪年，季节，时令，时辰。
5. 扩展帖子属性，其中帖子发表时间采用新的数据结构。
6. 扩展作者属性，其中作者生卒时间采用新的数据结构。
7. 修改界面，使帖子能够显示传统计时（年号，天干地支）。

## 中国地图坐标(GCJ-02)偏移算法破解小史

2010年1月，网友wuyongzheng发现：

I accidentally found the Chinese version of Google Map ditu.google.com to be able to correlate satellite image with map, and it gives the amount of deviation for any location in China. This URL queries the deviation of 34.29273N,108.94695E (Xi’an): http://ditu.google.com/maps/vp?spn=0.001,0.001&t=h&z=18&vp=\$34.29273,108.94695 (seems it’ doesn’t work now)

2013年5月，Maxime Guilbot根据这个建议得到4-5米精度的逼近：

https://github.com/maxime/ChinaMapDeviation

2013年10月，wuyongzheng自己进行了回归，得到如下结果：

http://wuyongzheng.github.io/china-map-deviation/paper.html

Maxime Guibot和wuyongzheng的回归结果基本代表了在黑暗中摸索的最佳结果，因此得到了广泛的注意和应用。

2013年2月，这段代码被网友coolypf注意到，整理后用到了他自己的项目中：

https://on4wp7.codeplex.com/SourceControl/changeset/view/21483#353936

        const double pi = 3.14159265358979324;

//
// Krasovsky 1940
//
// a = 6378245.0, 1/f = 298.3
// b = a * (1 - f)
// ee = (a^2 - b^2) / a^2;
const double a = 6378245.0;
const double ee = 0.00669342162296594323;

//
// World Geodetic System ==> Mars Geodetic System
public static void transform(double wgLat, double wgLon, out double mgLat, out double mgLon)
{
if (outOfChina(wgLat, wgLon))
{
mgLat = wgLat;
mgLon = wgLon;
return;
}
double dLat = transformLat(wgLon - 105.0, wgLat - 35.0);
double dLon = transformLon(wgLon - 105.0, wgLat - 35.0);
double radLat = wgLat / 180.0 * pi;
magic = 1 - ee * magic * magic;
double sqrtMagic = Math.Sqrt(magic);
dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
dLon = (dLon * 180.0) / (a / sqrtMagic * Math.Cos(radLat) * pi);
mgLat = wgLat + dLat;
mgLon = wgLon + dLon;
}

2013年3月，coolypf在自己的博客中介绍了这一段代码：

http://blog.csdn.net/coolypf/article/details/8686588

2014年9月，wuyongzheng注意到了coolypf的项目。至此，两条路径合流，坐标偏移问题基本得到了完美解决。

## 笔记

Between 2009 and 2012, the recurrent neural networks and deep feedforward neural networks developed in the research group of Jürgen Schmidhuber at the Swiss AI Lab IDSIA have won eight international competitions in pattern recognition and machine learning.[12][13] For example, the bi-directional and multi-dimensional long short term memory (LSTM)[14][15][16][17] of Alex Graves et al. won three competitions in connected handwriting recognition at the 2009 International Conference on Document Analysis and Recognition (ICDAR), without any prior knowledge about the three different languages to be learned.

http://en.wikipedia.org/wiki/Artificial_neural_network#Improvements_since_2006