乖乖给我发的情人节视频贺卡

A Brief History of Sensor Networks

A Brief History of Sensor Networks

Publish at Scribd or explore others: Research network sensor

WSRF Tutorial

Tutorial 1

Publish at Scribd or explore others: Manuals Internet & Technolog 2008 powerpoint

WWII Posters

http://afsf.lackland.af.mil/images/wwii/index.htm

PASSED! Sun Certificated Specialist for NetBeans IDE

Dear Peng (Certification ID#: SUN484247)

Congratulations on completing all the requirements for the
Sun Certified Specialist for NetBeans IDE certification. You were certified on 10/31/2008.

......
......

Congratulations!

Certification Department

 

Actually, this is my first IT skill certificate

Simple EHCACHE Application

Ehcache is a widely used java distributed cache for general purpose caching, Java EE and light-weight containers.
It features memory and disk stores, replicate by copy and invalidate, listeners, cache loaders, cache extensions, cache exception handlers, a gzip caching servlet filter and much more ...
Ehcache is available under an Apache open source license and is actively developed, maintained and supported.

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package helloehcache;

import java.util.Random;
import net.sf.ehcache.Cache;
import net.sf.ehcache.CacheManager;
import net.sf.ehcache.Element;

/**
 *
 * @author Administrator
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        //Create a CacheManager instance using defaults.
        CacheManager manager = new CacheManager();
        //Create a Cache and add it to the CacheManager, then use it.
        /*
         * @param name                the name of the cache. Note that "default" is a reserved name for the defaultCache.
         * @param maxElementsInMemory the maximum number of elements in memory, before they are evicted
         * @param overflowToDisk      whether to use the disk store
         * @param eternal             whether the elements in the cache are eternal, i.e. never expire
         * @param timeToLiveSeconds   the default amount of time to live for an element from its creation date
         * @param timeToIdleSeconds   the default amount of time to live for an element from its last accessed or modified date
         */
        Cache memoryOnlyCache = new Cache("CacheName", 5000, true, false, 7, 2);
        manager.addCache(memoryOnlyCache);
        Cache testCache = manager.getCache("CacheName");

        for (int i = 0; i < 10; i++) {
            //Queries are coming
            Random random = new Random();
            String key = "Key" + String.valueOf((int) (random.nextFloat() * 10f));
            String value = "Value" + String.valueOf(random.nextFloat() * 10f);
            System.out.println(i + ". Quering " + key);
            if (testCache.get(key) == null) {
                System.out.print("Cache is not hit! ");
                testCache.put(new Element(key, value));
                System.out.print(key + " " + value + " has been put into cache.");
            } else {
                System.out.print("Cache is hit! ");
                Element cachedResult = testCache.get(key);
                System.out.print("The value is " + cachedResult.getObjectValue());
            }
            System.out.println();
            System.out.println();
        }
        System.out.println(testCache.getStatistics().getCacheMisses() + "/10 missing");
        manager.shutdown();
    }
}

For more code samples, please visit: http://ehcache.sourceforge.net/documentation/samples.html

ISSNIP Summer School 2008

I gave a talk in Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP) yesterday. My talk covers 2 topics, one is Sensor Network Analyzer from company I am working for and Sun SPOT.

Issnip Presentation

View SlideShare presentation or Upload your own.

Daintree's Sensor Network Analyzer (SNA) provides the industry's most comprehensive solution for ZigBee and 802.15.4 testing, analysis and commissioning. For more information, please check: http://www.daintree.net/

For more information about ISSNIP, please check:http://www.ee.unimelb.edu.au/ISSNIP/events/summerschool08.html