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	<title>What do you learn this month?</title>
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	<description>Collection or codification of my knowledge</description>
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		<title>What do you learn this month?</title>
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		<title>Diode clamp basics</title>
		<link>http://zcambridge.wordpress.com/2009/08/12/diode-clamp-basics/</link>
		<comments>http://zcambridge.wordpress.com/2009/08/12/diode-clamp-basics/#comments</comments>
		<pubDate>Wed, 12 Aug 2009 12:56:17 +0000</pubDate>
		<dc:creator>zcambridge</dc:creator>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[Circuit]]></category>
		<category><![CDATA[Diode]]></category>
		<category><![CDATA[High voltage]]></category>
		<category><![CDATA[Low voltage]]></category>
		<category><![CDATA[Tips]]></category>

		<guid isPermaLink="false">http://zcambridge.wordpress.com/2009/08/12/diode-clamp-basics/</guid>
		<description><![CDATA[二极管钳位保护电路是指由两个二极管反向并联组成的，一次只能有一个二极管导通，而另一个处于截止状态，那么它的正反向压降就会被钳制在二极管正向导通压降0.5-0.7以下，从而起到保护电路的目的，具体电路需要具体分析，但只要把握了原理，就会很容易了 两端电压差较小（小于正向导通电压）时，相当于开路，这对于隔离高压电路和低压电路很有用处。 Tagged: Circuit, Diode, High voltage, Low voltage, Tips<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=zcambridge.wordpress.com&amp;blog=4404825&amp;post=50&amp;subd=zcambridge&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>This guy Reading Ultrasound Imaging from Bj&#248;rn A.J. Angelsen (III)</title>
		<link>http://zcambridge.wordpress.com/2009/07/04/this-guy-reading-ultrasound-imaging-from-bjrn-a-j-angelsen-iii/</link>
		<comments>http://zcambridge.wordpress.com/2009/07/04/this-guy-reading-ultrasound-imaging-from-bjrn-a-j-angelsen-iii/#comments</comments>
		<pubDate>Sat, 04 Jul 2009 19:55:20 +0000</pubDate>
		<dc:creator>zcambridge</dc:creator>
				<category><![CDATA[Ultrasound]]></category>

		<guid isPermaLink="false">http://zcambridge.wordpress.com/2009/07/04/this-guy-reading-ultrasound-imaging-from-bjrn-a-j-angelsen-iii/</guid>
		<description><![CDATA[My note will include the following content: Important concept. Factors affecting image quality. Pulse echo amplitude imaging VS. Doppler imaging and color flow imaging, requirement and application. Distinguishing and comparing PW/CW, LPRF/HPRF, different transducer arrays. Ultrasound scanline processing. Some problems according to the book and my confusing. Distinguishing and comparing PW/CW, LPRF/HPRF, different transducer arrays. [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=zcambridge.wordpress.com&amp;blog=4404825&amp;post=49&amp;subd=zcambridge&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>Reading Ultrasound Imaging from Bj&#248;rn A.J. Angelsen (II)</title>
		<link>http://zcambridge.wordpress.com/2009/07/03/reading-ultrasound-imaging-from-bjrn-a-j-angelsen-ii/</link>
		<comments>http://zcambridge.wordpress.com/2009/07/03/reading-ultrasound-imaging-from-bjrn-a-j-angelsen-ii/#comments</comments>
		<pubDate>Fri, 03 Jul 2009 14:12:03 +0000</pubDate>
		<dc:creator>zcambridge</dc:creator>
				<category><![CDATA[Ultrasound]]></category>
		<category><![CDATA[basic]]></category>
		<category><![CDATA[book]]></category>
		<category><![CDATA[imaging]]></category>
		<category><![CDATA[medical]]></category>
		<category><![CDATA[note]]></category>
		<category><![CDATA[signal]]></category>
		<category><![CDATA[summary]]></category>
		<category><![CDATA[wave]]></category>

		<guid isPermaLink="false">http://zcambridge.wordpress.com/2009/07/03/reading-ultrasound-imaging-from-bjrn-a-j-angelsen-ii/</guid>
		<description><![CDATA[My note will include the following content: Important concept. Factors affecting image quality. Pulse echo amplitude imaging VS. Doppler imaging and color flow imaging, requirement and application. Distinguishing and comparing PW/CW, LPRF/HPRF, different transducer arrays. Ultrasound scanline processing. Some problems according to the book and my confusing. Important concept refer to book. here if I [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=zcambridge.wordpress.com&amp;blog=4404825&amp;post=48&amp;subd=zcambridge&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>Reading Ultrasound Imaging from Bj&#248;rn A.J. Angelsen (I)</title>
		<link>http://zcambridge.wordpress.com/2009/07/03/reading-ultrasound-imaging-from-bjrn-a-j-angelsen-i/</link>
		<comments>http://zcambridge.wordpress.com/2009/07/03/reading-ultrasound-imaging-from-bjrn-a-j-angelsen-i/#comments</comments>
		<pubDate>Fri, 03 Jul 2009 10:06:28 +0000</pubDate>
		<dc:creator>zcambridge</dc:creator>
				<category><![CDATA[Ultrasound]]></category>
		<category><![CDATA[basic]]></category>
		<category><![CDATA[beamforming]]></category>
		<category><![CDATA[book]]></category>
		<category><![CDATA[imaging]]></category>
		<category><![CDATA[medical]]></category>
		<category><![CDATA[note]]></category>
		<category><![CDATA[signal]]></category>
		<category><![CDATA[study]]></category>
		<category><![CDATA[wave]]></category>

		<guid isPermaLink="false">http://zcambridge.wordpress.com/2009/07/03/reading-ultrasound-imaging-from-bjrn-a-j-angelsen-i/</guid>
		<description><![CDATA[picture source:http://www.ultrasoundbook.com/ When I was writing this post, I was sitting next to author’s office in NTNU. “Due to many requests, we are now offering Chapter 1 of Ultrasound Imaging as a special print. In a qualitative way, this new book gives an easy to read introduction into the technical methods of medical ultrasound imaging, [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=zcambridge.wordpress.com&amp;blog=4404825&amp;post=40&amp;subd=zcambridge&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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			<media:title type="html">zcambridge</media:title>
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		<item>
		<title>summarizing makes progress</title>
		<link>http://zcambridge.wordpress.com/2009/07/03/summarizing-makes-progress/</link>
		<comments>http://zcambridge.wordpress.com/2009/07/03/summarizing-makes-progress/#comments</comments>
		<pubDate>Fri, 03 Jul 2009 07:12:11 +0000</pubDate>
		<dc:creator>zcambridge</dc:creator>
				<category><![CDATA[PLAN]]></category>
		<category><![CDATA[progress]]></category>
		<category><![CDATA[summary]]></category>
		<category><![CDATA[to do]]></category>
		<category><![CDATA[work]]></category>

		<guid isPermaLink="false">http://zcambridge.wordpress.com/2009/07/03/summarizing-makes-progress/</guid>
		<description><![CDATA[That’s why I hold this blog. After arriving Trondheim, everything is new. Lots of stuff to learn and the most efficient way is to stop when in hurry, to summarize when studying. In this post, I want to make some rules for myself: Version 1.0&#160;&#160; 2009.07.03 by Kangqiao Do make note after certain time period [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=zcambridge.wordpress.com&amp;blog=4404825&amp;post=33&amp;subd=zcambridge&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>&#8220;vsftpd: refusing to run with writable anonymous root&#8221;problem solved</title>
		<link>http://zcambridge.wordpress.com/2009/05/28/vsftpd-refusing-to-run-with-writable-anonymous-rootproblem-solved/</link>
		<comments>http://zcambridge.wordpress.com/2009/05/28/vsftpd-refusing-to-run-with-writable-anonymous-rootproblem-solved/#comments</comments>
		<pubDate>Thu, 28 May 2009 13:02:06 +0000</pubDate>
		<dc:creator>zcambridge</dc:creator>
				<category><![CDATA[Linux]]></category>
		<category><![CDATA[anonymous]]></category>
		<category><![CDATA[Vsftpd]]></category>

		<guid isPermaLink="false">http://zcambridge.wordpress.com/2009/05/28/vsftpd-refusing-to-run-with-writable-anonymous-rootproblem-solved/</guid>
		<description><![CDATA[500 OOPS: vsftpd: refusing to run with writable anonymous root 很多人问这个问题 google中文没人回答 google英文说的都含糊 其实只要把anon_root目录本身的 w权限去掉就可以了 比如 在配置文件中设定了 anon_root=/var/ftp 那么 /var/ftp就是这样： dr-xr-xr-x 4 root root 4096 Nov 11 09:52 /var/ftp/ /var/ftp里就是这样： drwxrwxrwx 3 ftp ftp 4096 Nov 11 11:15 incoming dr-xr-xr-x 2 ftp ftp 4096 Jul 6 14:24 pub cat /etc/vsftpd/vsftpd.conf # Example config file /opt/etc/vsftpd.conf [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=zcambridge.wordpress.com&amp;blog=4404825&amp;post=32&amp;subd=zcambridge&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>Title</title>
		<link>http://zcambridge.wordpress.com/2009/04/23/title-2/</link>
		<comments>http://zcambridge.wordpress.com/2009/04/23/title-2/#comments</comments>
		<pubDate>Thu, 23 Apr 2009 14:37:28 +0000</pubDate>
		<dc:creator>zcambridge</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

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		<description><![CDATA[Title: Trends in Digital Marketing Abstract Since the discovery of the internet and improvement in digital technology, the race has been on for better ways of utilizing these advances to push products and services information to consumers. Companies are innovating on how best to attract and keep users and this has created many marketing opportunities [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=zcambridge.wordpress.com&amp;blog=4404825&amp;post=29&amp;subd=zcambridge&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>Title</title>
		<link>http://zcambridge.wordpress.com/2009/04/23/title/</link>
		<comments>http://zcambridge.wordpress.com/2009/04/23/title/#comments</comments>
		<pubDate>Thu, 23 Apr 2009 13:28:08 +0000</pubDate>
		<dc:creator>zcambridge</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://zcambridge.wordpress.com/2009/04/23/title/</guid>
		<description><![CDATA[Title: Trends in Digital Marketing Abstract Since the discovery of the internet and improvement in digital technology, the race has been on for better ways of utilizing these advances to push products and services information to consumers. Companies are innovating on how best to attract and keep users and this has created many marketing opportunities [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=zcambridge.wordpress.com&amp;blog=4404825&amp;post=28&amp;subd=zcambridge&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>昨天，Bluetooth v3.0 + HS (蓝牙 v3)发布</title>
		<link>http://zcambridge.wordpress.com/2009/04/22/%e6%98%a8%e5%a4%a9%ef%bc%8cbluetooth-v30-hs-%e8%93%9d%e7%89%99-v3%e5%8f%91%e5%b8%83/</link>
		<comments>http://zcambridge.wordpress.com/2009/04/22/%e6%98%a8%e5%a4%a9%ef%bc%8cbluetooth-v30-hs-%e8%93%9d%e7%89%99-v3%e5%8f%91%e5%b8%83/#comments</comments>
		<pubDate>Wed, 22 Apr 2009 07:20:58 +0000</pubDate>
		<dc:creator>zcambridge</dc:creator>
				<category><![CDATA[News]]></category>
		<category><![CDATA[Bluetooth]]></category>
		<category><![CDATA[蓝牙]]></category>
		<category><![CDATA[New technology]]></category>

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		<description><![CDATA[Bluetooth v3.0 如期而至，带来的会是什么。现在还不知道。不过可以期待，最引人瞩目的当然是802.11 PAL带给人们的高速享受。 NEW FEATURES Several new features are introduced in Bluetooth Core Specification v3.0 + HS. The major areas of improvement are: • AMP Manager Protocol (A2MP) • Enhancements to L2CAP including • Enhanced Retransmission Mode and Streaming Mode • Improvements to the L2CAP state machine for AMP channels • Fixed channel support [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=zcambridge.wordpress.com&amp;blog=4404825&amp;post=18&amp;subd=zcambridge&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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		<title>&#8220;Far from perfect, not even close.&#8221;</title>
		<link>http://zcambridge.wordpress.com/2009/04/06/far-from-perfect-not-even-close/</link>
		<comments>http://zcambridge.wordpress.com/2009/04/06/far-from-perfect-not-even-close/#comments</comments>
		<pubDate>Mon, 06 Apr 2009 09:20:11 +0000</pubDate>
		<dc:creator>zcambridge</dc:creator>
				<category><![CDATA[Mistakes]]></category>
		<category><![CDATA[PhD]]></category>

		<guid isPermaLink="false">http://zcambridge.wordpress.com/2009/04/06/far-from-perfect-not-even-close/</guid>
		<description><![CDATA[I went to the door and breath deeply in and out of my mouth. At the moment, sunlight became shinning so bright and so warm. lie down on the ground of our room. I got a bad news and a good news: BAD: I made a mistake in one email to query about PhD position [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=zcambridge.wordpress.com&amp;blog=4404825&amp;post=17&amp;subd=zcambridge&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
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