ABS - A durable plastic/nylon material used in and on many percussion stands. Adjustable angle clamp - A rack clamp that connects two horizontal support bars without the use of a leg. Anodized steel - Electric paint process for metal in colored and brushed finishes. ATS (Advanced Tripod System) - Leg brace which utilizes separately adjustable collars to position legs. Ball-and-socket (or 360 degree adjustment) - A tilting mechanism used on various mounts which utilizes an ABS ball to swivel mount. Bass drum beater - A metal shaft topped by a beater ball, which is inserted into a hole in the beater hub of a bass drum pedal. Bass pedal spring - The spring that connects to the cam assembly and a receptor in the base of the frame of a bass drum pedal, which pulls the pedal back from the head when the pedal board isn't depressed. Batter head - The top head of a drum which is struck. Bearing edge - Point of drum shell where the head makes contact. Beater hub - The bass pedal assembly that attaches the bass drum beater to the drive shaft. Beater pad - The pad that affixes to the bass drumhead at the point of impact. Boom stand - A stand that has a boom arm attachment. Brushed finish - Metal which has a slightly rough finish. Sometimes anodized, sometimes tumbled to smooth rough finishes. Butt end (see snare butt) - Usually found on the side of a snare drum opposite the throw-off. This piece holds the snares in a fixed position. Cable hi-hat pedal - A pedal that allows the hi-hat cymbals to be positioned anywhere on a drum kit. Cam drive - A non-tooth or toothless chain drive mechanism. Chain drive - A pedal with a bicycle chain that connects the beater hub to footboard. Chrome finish - A three-step process of electrically adhering several metal to steel to give a brilliant covering. Claw hooks - The hooks that grip the outer edge of the bass drum hoop. Clutch - The clamping mechanism that holds the top hi-hat cymbal to the pull rod. Counterhoop - A circular piece of steel, brass or wood that applies tension on the drumhead when the tension rods are tightened. Counterweight - On bass drum beaters, attaches to the beater shaft to fine-tune the pedal action. On boom cymbal stands, attaches to the bottom of a boom arm to counteract the weight of cymbal. Cymbal sleeve - A plastic or nylon sleeve that prevents a cymbal from touching the metal rod of a cymbal stand. Cymbal stacker - Allows two cymbals to be mounted above and below each other on one stand. Die-cast - Made by casting metal in a mold. Double-bass pedal - A two-pedal system that enables the drummer to play a single bass drum with both feet. Double-braced - Tripod legs constructed of two parallel pieces of stamped metal that meet and attach at both the rubber foot and the top collar. Drop clutch - A hi-hat clutch that allows a drummer to close the hi-hat cymbals by hitting the clutch's release arm with a stick. Elliptical leg base - A stand leg base which utilizes round to oval tube stock. Rock or Turbo plate - A metal plate connected to the underside of a bass pedal's heel plate and to the bottom of the pedal's frame, replacing the standard radius rod. 45 Degree Angle System - A leg system that supports the weight of an item on an angle. Freefloating - Drum tensioning hardware which does not touch the shell. Hardened steel - Steel which has gone through a special process of heating and cooling to increase its strength. Hideaway boom - A cymbal stand which can double as a straight or boom stand. Hihat stabilizer - Secures cable hi-hat pedals to other pieces of hardware. Knurl - A small projecting ridge to assist in gripping an object. L-rod - L-shaped rod used to mount percussion instruments. Lug - The bracket attached to a drum that accepts a tension rod. Lugnut - The receptacle which fits inside a lug and accepts a tension rod, allowing a drum to be tuned. Memory clamp - Holds chosen positions on stands and rack systems. Multi-clamp - A clamp which mounts various instruments and/or stands to each other. (Traditionally used on cymbal stands.) | ||||
Remember. If you limit yourself to only doubling with your leading hand... Then... You'll be limiting yourself to only doubling with your leading hand... | ||||
2011年9月11日 星期日
2011年4月19日 星期二
2011.4.19 -- 電磁 -- VOLUM CURRENT , SUBFACE CURRENT 新理解
http://www.2dix.com/view/view.php?urllink=http%3A%2F%2Fwww.phys.unsw.edu.au%2FPHYS2939%2Fpdf%2FMagnetic_Materials.pdf&searchx=volume%20current%20surface%20current%20magnetic
2011.4.19 -- 電磁 -- Magnetic Vector Potential , 新理解
http://www.2dix.com/view/view.php?urllink=http%3A%2F%2Fwww.ittc.ku.edu%2F~jstiles%2F220%2Fhandouts%2FThe%20Integral%20Definition%20of%20Magnetic%20Vector%20Potential.pdf&searchx=magnetic%20vector%20potential
A .. . .好難講, 裡面有些比較好懂的圖
A .. . .好難講, 裡面有些比較好懂的圖
2011年3月28日 星期一
2010年12月1日 星期三
android -- Good tutor for Starting (GUI)
http://mobiforge.com/developing/story/getting-started-with-android-development
2010年11月29日 星期一
android -- 開發環境 for window
我是參考這2個網站的 :
http://forum.hkgphone.com/thread-36-1-1.html
http://developer.android.com/sdk/index.html
步驟如下:
1)有java jdk 才可以安裝下面2個工具
安裝 java JDK: http://java.sun.com/javase/downloads/index.jsp
2)安裝 Eclipse : http://www.eclipse.org/downloads/
3)安裝 android JDK http://developer.android.com/sdk/index.html
4)把eclipse和android連接起來 !!!!!!!!!!
ADT Plugin for Eclipse : http://developer.android.com/sdk/eclipse-adt.html#installing
有一點麻煩 有2種版本 Eclipse 3.4 (Ganymede) 和 Eclipse 3.5 (Galileo)
我的是galileo , 所以給大家參考一下:
i) Start Eclipse, then select Help > Install New Software.
II)In the Available Software dialog, click Add....

III)In the Add Site dialog that appears, enter a name for the remote site (for example, "Android Plugin") in the "Name" field.
In the "Location" field, enter this URL:
https://dl-ssl.google.com/android/eclipse/

Note: If you have trouble acquiring the plugin, you can try using "http" in the URL, instead of "https" (https is preferred for security reasons).
Click OK.
IIII) Back in the Available Software view, you should now see "Developer Tools" added to the list. Select the checkbox next to Developer Tools, which will automatically select the nested tools Android DDMS and Android Development Tools. Click Next.

IIIII) In the resulting Install Details dialog, the Android DDMS and Android Development Tools features are listed. Click Next to read and accept the license agreement and install any dependencies, then click Finish.
IIIIII)
Restart Eclipse.
5)go to window menu option and select preferences.
Here you can specify the android sdk from the android download file
要選到包含"tool" 資料夾的上一層. 例如 c:/a/b/tool 你要選資料夾b

by : http://androidforums.com/application-development/11432-new-project-sdk-target-must-specified.html
6)可以開始進行hello world 官方教學: http://developer.android.com/resources/tutorials/hello-world.html
http://forum.hkgphone.com/thread-36-1-1.html
http://developer.android.com/sdk/index.html
步驟如下:
1)有java jdk 才可以安裝下面2個工具
安裝 java JDK: http://java.sun.com/javase/downloads/index.jsp
2)安裝 Eclipse : http://www.eclipse.org/downloads/
3)安裝 android JDK http://developer.android.com/sdk/index.html
4)把eclipse和android連接起來 !!!!!!!!!!
ADT Plugin for Eclipse : http://developer.android.com/sdk/eclipse-adt.html#installing
有一點麻煩 有2種版本 Eclipse 3.4 (Ganymede) 和 Eclipse 3.5 (Galileo)
我的是galileo , 所以給大家參考一下:
i) Start Eclipse, then select Help > Install New Software.
II)In the Available Software dialog, click Add....

III)In the Add Site dialog that appears, enter a name for the remote site (for example, "Android Plugin") in the "Name" field.
In the "Location" field, enter this URL:
https://dl-ssl.google.com/android/eclipse/
Note: If you have trouble acquiring the plugin, you can try using "http" in the URL, instead of "https" (https is preferred for security reasons).
Click OK.
IIII) Back in the Available Software view, you should now see "Developer Tools" added to the list. Select the checkbox next to Developer Tools, which will automatically select the nested tools Android DDMS and Android Development Tools. Click Next.

IIIII) In the resulting Install Details dialog, the Android DDMS and Android Development Tools features are listed. Click Next to read and accept the license agreement and install any dependencies, then click Finish.
IIIIII)
Restart Eclipse.
5)go to window menu option and select preferences.
Here you can specify the android sdk from the android download file
要選到包含"tool" 資料夾的上一層. 例如 c:/a/b/tool 你要選資料夾b
by : http://androidforums.com/application-development/11432-new-project-sdk-target-must-specified.html
6)可以開始進行hello world 官方教學: http://developer.android.com/resources/tutorials/hello-world.html
2010年11月9日 星期二
matlab -- exmple of Gram-Schmidt process
find the orthoggonal set of w1,w2,w3 , then save to v( , );
w1=[1 0 1]';
w2=[0 1 1]';
w3=[1 3 3]';
i=3;
w=zeros(i,i);
v=zeros(i,i);
w(:,1)=w1
w(:,2)=w2
w(:,3)=w3
v(:,1)=w1;
for j=2:i,
v(:,j)=w(:,j);
for k=1:j-1,
wdv=w(:,j)' * v(:,k)
v2=v(:,k)' * v(:,k)
v(:,j)=v(:,j)- vdw/v2 *v(:,k);
end
end
w1=[1 0 1]';
w2=[0 1 1]';
w3=[1 3 3]';
i=3;
w=zeros(i,i);
v=zeros(i,i);
w(:,1)=w1
w(:,2)=w2
w(:,3)=w3
v(:,1)=w1;
for j=2:i,
v(:,j)=w(:,j);
for k=1:j-1,
wdv=w(:,j)' * v(:,k)
v2=v(:,k)' * v(:,k)
v(:,j)=v(:,j)- vdw/v2 *v(:,k);
end
end
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