异步电机无速度传感器矢量控制

一个粒子群优化算法的实例，对于初步学习者是一个不错的学习实例。(An example of particle swarm optimization algorithm for the initial learner is a good learning example. )

说明：  Bessel 函数与三角函数之积的级数展开及在微波滤波器中的应用.(Serie s Expansions of the Poduct of Be s sel Functions and Sine/ Co sine Functions and Their Applications in Microwave Filter)

pvm系统分析（4）——pvm消息机制.pdf(AN System (4)-- AN message mechanism. Pdf)

画箭头用的一个matlab程序，箭头是二维度的，需要说如箭头大小的控制参量(draw an arrow,only the two dimmentional arow,and the arrow is composed of three lines,two short an one long,the results may not viry beatuiful but is very simple)

坐标转换（四参数） [row col]=size(source) for i=1:row u(i)=source(i,2) v(i)=source(i,3) x(i)=source(i,4) y(i)=source(i,5) B(2*i-1,1)=1 B(2*i-1,2)=0 B(2*i-1,3)=u(i) B(2*i-1,4)=-v(i) B(2*i,1)=0 B(2*i,2)=1 B(2*i,3)=v(i) B(2*i,4)=u(i) L(2*i-1,1)=x(i) L(2*i,1)=y(i) end X=inv(B *B)*(B *L) Txy=[X(1) X(2)] xzjz(1,1)=X(3) xzjz(1,2)=-X(4) xzjz(2,1)=X(4) xzjz(2,2)=X(3) [row1 col1]=size(target) for i=1:row1 u1(i)=target(i,2) v1(i)=target(i,3) d=[u1(i) v1(i)] md=Txy+xzjz*d end end (Coordinate conversion： [row col]=size(source) for i=1:row u(i)=source(i,2) v(i)=source(i,3) x(i)=source(i,4) y(i)=source(i,5) B(2*i-1,1)=1 B(2*i-1,2)=0 B(2*i-1,3)=u(i) B(2*i-1,4)=-v(i) B(2*i,1)=0 B(2*i,2)=1 B(2*i,3)=v(i) B(2*i,4)=u(i) L(2*i-1,1)=x(i) L(2*i,1)=y(i) end X=inv(B *B)*(B *L) Txy=[X(1) X(2)] xzjz(1,1)=X(3) xzjz(1,2)=-X(4) xzjz(2,1)=X(4) xzjz(2,2)=X(3) [row1 col1]=size(target) for i=1:row1 u1(i)=target(i,2) v1(i)=target(i,3) d=[u1(i) v1(i)] md=Txy+xzjz*d end end )

低频信号先进行放大，再调制解调，设计发射(Low-frequency signal is first amplified, and then modulation and demodulation, the transmitter )

复杂网络领域大神Dorogovstev著作，evolution networks： biological net to INTERNET and WWW(evolution networks： biological net to WWW)

一个很好的个人管理软件 已经测试过的 可以使用 无毒 放心下载(A good personal management software has been tested using non-toxic assured Download)

参考文件，MMBT3904 datasheet(References，MMBT3904 datasheet)

RADAR RADIATION PATTERN for synthetic aperture radar system