diff --git a/OPC_Client_Utgard/.classpath b/OPC_Client_Utgard/.classpath
index 850c2f7..eced7ec 100644
--- a/OPC_Client_Utgard/.classpath
+++ b/OPC_Client_Utgard/.classpath
@@ -13,12 +13,12 @@
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER">
+	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
diff --git a/OPC_Client_Utgard_Performance/.classpath b/OPC_Client_Utgard_Performance/.classpath
index 7ed68b1..6c0c5bb 100644
--- a/OPC_Client_Utgard_Performance/.classpath
+++ b/OPC_Client_Utgard_Performance/.classpath
@@ -13,12 +13,12 @@
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER">
+	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
diff --git a/README.md b/README.md
index 4391ad0..74fb71f 100644
--- a/README.md
+++ b/README.md
@@ -24,3 +24,6 @@ Also for the real produce environment, there's two example for <b>performance</b
 + `书籍` OPC开发参考书籍
 + `学习笔记` 个人OPC学习笔记和一个测试结果文档`OPC压力测试结果统计`
 + `安装文件` 一个OPC Server 模拟器 ·Matrikon Simulation OPC Server·
+
+##学习笔记
++ [个人学习OPC学习笔记](http://www.hifreud.com/tag/#OPC-ref)
\ No newline at end of file
diff --git a/org.openscada.opc.dcom.test/.classpath b/org.openscada.opc.dcom.test/.classpath
index 8f89c61..9b37f2e 100644
--- a/org.openscada.opc.dcom.test/.classpath
+++ b/org.openscada.opc.dcom.test/.classpath
@@ -1,16 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
 	<classpathentry kind="src" path="src"/>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER">
-		<attributes>
-			<attribute name="maven.pomderived" value="true"/>
-		</attributes>
-	</classpathentry>
 	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
 	</classpathentry>
 	<classpathentry kind="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/4"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5">
+		<attributes>
+			<attribute name="maven.pomderived" value="true"/>
+		</attributes>
+	</classpathentry>
 	<classpathentry kind="output" path="target/classes"/>
 </classpath>
diff --git a/org.openscada.opc.dcom/.classpath b/org.openscada.opc.dcom/.classpath
index 2911ff5..edd809a 100644
--- a/org.openscada.opc.dcom/.classpath
+++ b/org.openscada.opc.dcom/.classpath
@@ -2,12 +2,12 @@
 <classpath>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry kind="con" path="org.eclipse.pde.core.requiredPlugins"/>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER">
+	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
diff --git a/org.openscada.opc.lib.test/.classpath b/org.openscada.opc.lib.test/.classpath
index 00cb339..d3d0606 100644
--- a/org.openscada.opc.lib.test/.classpath
+++ b/org.openscada.opc.lib.test/.classpath
@@ -1,12 +1,12 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <classpath>
 	<classpathentry kind="src" path="src"/>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER">
+	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
diff --git a/org.openscada.opc.lib/.classpath b/org.openscada.opc.lib/.classpath
index 6821461..ddf3398 100644
--- a/org.openscada.opc.lib/.classpath
+++ b/org.openscada.opc.lib/.classpath
@@ -2,12 +2,12 @@
 <classpath>
 	<classpathentry kind="src" path="src"/>
 	<classpathentry combineaccessrules="false" kind="src" path="/org.openscada.opc.dcom"/>
-	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER">
+	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
 	</classpathentry>
-	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
 		</attributes>
diff --git a/学习笔记/OPC 学习笔记 1-技术准备.docx b/学习笔记/OPC 学习笔记 1-技术准备.docx
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deleted file mode 100644
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diff --git a/学习笔记/OPC 学习笔记 5-Client调用之Utgard.docx b/学习笔记/OPC 学习笔记 5-Client调用之Utgard.docx
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