前沿 从quartus ii 10.1开始，altera推出了Qsys Beta版，而从11.0开始则正式推出了Qsys取代了sopc builder。 Qsys的特性 Qsys在成功的SOPC Builder基础上，实现了新的系统开发特性以及新的高性能互联，从而进一步提高了FPGA设计人员的效能。Qsys为FPGA设计人员提供的优势包括： 自动产生互联，提供即插即用Qsys编译知识产权(IP... [阅读全文]

收集的标准是， 1. 翔实，能够讲清楚，说明白，不是简单的罗列 2. 准确 3. 简单，我看不懂的就不列了 不断增加 0. Book Addison Wesley Algorithms 4th Edition Robert Sedgewick最新出品，目前是我看到的最漂亮的电子书，内容对程序员来讲，难度适中，讲解翔实，难得的佳作 1. Red Black Tree & 2-3-4 Tree 红黑树... [阅读全文]

built-in functions: range() len(object) keyword in, return boolean filter(function,sequence) map(function,*sequence) reduce(function,sequence) enumerate(object) – [(0,item0),(1,item1),…] zip(seq1,seq2... [阅读全文]

XS: eXternal Subroutine, 也叫做xsub. 它是perl代码中调用c或者c++ 子例程的接口。 在许多情形下，如一些CPU或内存密集型的任务，单纯使用PERL很难满足这些需求，这时，可以使用c或c++语言完成该任务，提供好接口后，通过XS接口可以直接被PERL 代码以module的形式调用。 环境: OS :debian 5 lenny PERL: This is perl... [阅读全文]

如果您有疑问或建议，请进入技术讨论区交流 F# Tutorial - Sample Code - 让初学者了解F#第一步 // F# Tutorial File // // This file contains sample code to guide you through the // primitives of the F# language. /... [阅读全文]

Select a rounded rectangle shape tool.　　Drag the tool to create a rounded rectangle as shown below.　　Press Ctrl+T. Right Click and select Warp.　　Adjust the handles as shown.　　In layer palette double c... [阅读全文]

　　Vector illustrations are known to be rather popular in web graphics today. Professional designers are able to create such illustrations in a matter of couple hours. If you are a beginner or an amate... [阅读全文]

In this lesson I’ll tell in detail how to draw burning candle. The flame is in general complex enough theme, and there is a of ways to draw it. I’ll show you _disibledevent="Photoshop Bur... [阅读全文]

In this tutorial we are going to practice some paing techniques and design a car concept.　　For this _disibledevent="Photoshop Concept car design Tutorial" / 　　Click image to expand.　　Enjoy and try it!... [阅读全文]

I choose to make my self portrait. If you want place reference image _disibledevent="Photoshop Drawing cartoon character from reference image Tutorial" /... [阅读全文]

The first you open the picture below:　　Press Ctrl+J to duplicate layer　　Go to Image - Adjustments - Brighness/Contrast and do as the picture below　　You will get:　　Press Ctrl+B to open Color Balance, ... [阅读全文]

Step 1 　　First of all open the image in photoshop and apply layer mask to it to hide the background.ul Underwater Scene" /　　Step 2 　　Make a layer. Set the foreground colour to #002156 and background ... [阅读全文]

本文举例源代码或素材下载 　　We will start with the following image:　　We are going to use the Heal tool (" alt="Photoshop How to Fix Blemishes in Photos Tutorial" /) to clear the skin in this photo.　　We wi... [阅读全文]

Here I will teach you about Photoshop Image Modication Blend　　Lets read & understand of the following steps　　[1]-First of all Open New Document of Custom size, Height & Width 500×500 pixels, Res... [阅读全文]

In a previous Photoshop effects tutorial, we looked at how to add a soft glow effect to a photo using a method that gave us the added bonus of increased image contrast and color saturation (see our Ea... [阅读全文]

to write something in black using the “Creampuff” font.　　　　3. Choose “Color Overlay” from the Layer Style options.　　　　4. Select a pinkish color. Because it makes most people t... [阅读全文]

Note: This is not the latest version of this document. It applies to NetBeans IDE 6.0/6.1 _disibledevent="File Type Integration Tutorial" / 　　Make it available to others via, for example, e-mail. The ... [阅读全文]

Webkit-border-horizontal-spacing: 2px; -Webkit-border-vertical-spacing: 2px; "So you just install .NET framework and want to start using C# but you don't know where to start ? well...First you could d... [阅读全文]