2011年9月11日 星期日

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.)


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Little-Drummer-Boy

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« Reply #1 on: May 10, 2007, 10:37:58 PM »


Had to put this on another post because all of it wouldnt fit on one post.

Nodal lug mounting - A method of mounting a drum's lugs at points on the shell where the vibrations from stick hits coverage.

Nylon bushing - Internal collar that prevents metal-to-metal contact within a stand.

Pedal board - The flat surface of a bass or hi-hat pedal which is activated by foot pressure, usually consisting of a footplate and a heel plate, connected by a hinge.

Percussion table - Flat table usually padded with edges to hold hand percussion instruments.

Platform stand - A stand used to mount several items.

Pot metal - Slang for casted zinc.

Powder coating - Special color process which bakes paint onto metal.

Pull rod - The internal drive of a hi-hat pedal.

Rachet - A wheel or bar beating a series of notches in which a pivoted tongue engages to prevent backward movement.

Rack multi-clamp - A clamp which mounts instruments to a rack a systems.

Rack system - A combination of horizontal and vertical bars and clamps on which instruments are mounted.

Resonant head - Bottom head used on tom toms and snare drums or the front of a bass drum.

Single-braced hardware - Tripod legs made of a solitary piece of stamped metal tipped with a rubber foot.

Snare basket - The upper assembly of a snare stand which cradles the snare drum.

Snare butt - The clamping device that holds the snare strands firmly on the side of the shell opposite the throw-off.


Snare cord (or straps) - Holds snares to throw-off and butt assembly.

Snares - Coiled metal strands which vibrate against the bottom (snare side) head of a snare drum.

Snare side head - The thinner head found on the bottom of a snare drum.

Spanner system - A horizontal rack bar that connects to two cymbal or tom stands.

Sproket drive - A chain-drive mechanism with teeth.

Stand - A telescoping series of tubular tiers held vertically by a tripod base that suspends an instrument.

Straight stand - A stand that has a single central shaft that is vertical to the floor.

Strap drive - A pedal with a leather or synthetic strap that connects the beater hub to the footboard.

Swivel cam - A protruding, circular part at the top of a bass pedal's frame which transmits a back-and-forth motion to the horizontal shaft supporting the beater hub.

T-clamp - The clamp that connects a leg to a rack's support bar.

Tension rod (or key rod) - Flat-nosed straight-sided screws that insert into a drum's lugs and apply pressure to the counterhoop.

Throw-off - A locking mechanism that provides tension on the snare strands.

Tier - The modular tubes that nest inside one another in the central body of a stand.

T-leg system - A leg system found on rack systems which has equal balance in the front and rear.

Tripod - A three-legged base.

Tom mount - The bracket which accepts a tom tom arm to mount a tom-tom to a bass drum, rack or stand.

Tube lug - A tubular, low-mass lug, commonly made of brass.

U joint - Metal assembly which allows movement with multiple position adjustment. Usually connects secondary pedal to primary pedal on double-pedal systems.

Washer - A metal or felt disc that sits between two objects.

Wingscrew - A screw with wing-like finger grips.

==================================

copy by:http://www.drumsoloartist.com/live/drumforum/index.php/topic,334.0.html

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

2011年3月28日 星期一

機率 -- 網頁推介 , 有所有分布的証明

有所有分布的証明 . 包括他們的期望 , 方差

http://www.statlect.com

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

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