对于初学者相当不错的技术文档 [Q]怎么样查询特殊字符，如通配符%与_ [A]select * from table where name like 'A\_%' escape '\' [Q]如何插入单引号到数据库表中 [A]可以用ASCII码处理，其它特殊字符如&也一样，如 insert into t values('i'||chr(39)||'m'); -- chr(39)代表字符' 或者用两个单引号表示一个 or insert into t values('I''m'); -- 两个''
经典线性规划算法 while a<0.05 c=[-0.05,-0.27,-0.19,-0.185,-0.185]; A=[zeros(4,1),diag([0.025,0.015,0.055,0.026])]; b=a*ones(4,1); Aeq=[1,1.01,1.02,1.045,1.065]; beq=1; LB=zeros(5,1); [x,Q]=linprog(c,A,b,Aeq,beq,LB); Q=-Q; plot(a,Q,'*r'); a=a+0.001; end x
状态控制电路的VHDL实现如下： LIBRARY IEEE; USE IEEE.STD_LOGIC_1164.ALL; USE IEEE.STD_LOGIC_UNSIGNED.ALL; USE IEEE.STD_LOGIC_ARITH.ALL; ENTITY controllor IS PORT( RESET:IN STD_LOGIC; --复位信号 KEY: IN STD_LOGIC_VECTOR(3 DOWNTO 0); --输入时间 SET_T:IN STD_LOGIC; --时间设置信
十进制计数器 library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity count10 is port(clr,start,clk: in bit; cout: out bit; library ieee; daout: out std_logic_vector(3 downto 0)); end count10; architecture a of count10 is signal
C----------------------------------------------------------------------- program runocc C----------------------------------------------------------------------- c C OCCAM 2.0: Steven Constable IGPP/SIO La Jolla CA 92093-0225 c Program Revision 2.01,
首发国美飞触二代刷机方法图文教程 【声明】刷新固件，是为了获得更好的使用体验，增强系统的稳定性，增加软件的功能。但是，也可能造成资料丢失，甚至当机变砖，本站不承担任何责任，特此说明！ x; ^9 A1 {( e, Y; i0 g7 d' @; f7 P Warning : Upgrade the system will bring good experience, but may cause data loss, machine damage ! It require great consid
