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数据库系统 实验描述:分布式数据库的算法partition的具体实现。即通过该算法找到关系数据库最优分裂点(2个)
实验描述:分布式数据库的算法partition的具体实现。即通过该算法找到关系数据库最优分裂点(2个),使得结果最优。
1、 首先根据所输入的attribute usage matrix得到AQ( )
2、 对CA矩阵中划分点预先设在n-1处,并将属性列分成3个集合,TA和BA和MA,
3、 确定集合TQ、BQ,MQ和OQ,其中TQ={ qj| AQ(qi) TA},BQ= TQ={ qj| AQ ...
电子书籍 OSInit() OSTaskCreate(Task1, &task_1, &TaskStk[0][TASK_STK_SIZE-1], 1) OSTaskCreate(Task2, &ta
OSInit()
OSTaskCreate(Task1, &task_1, &TaskStk[0][TASK_STK_SIZE-1], 1)
OSTaskCreate(Task2, &task_2, &TaskStk[1][TASK_STK_SIZE-1], 2)
OSTaskCreate(Task3, &task_3, &TaskStk[2][TASK_STK_SIZE-1], 3)
OSStart()
return 0
Java编程 实现一个类
实现一个类,描述二维平面的直线Line。
描述属性:私有属性
&#61550 直线所通过的点:Point p;
&#61550 直线的斜率:double m
实现方法:
&#61550 直线的构建;
&#61550 返回直线的两个属性;
&#61550 返回直线在Y轴上的截距:yIntercept ;
&#61550 判断两条直线是否相等;
&#61550 显示直线的内容:y = mx + b
& ...
其他 AtomicParsley is a lightweight command line program that can read and set iTunes-style metadata ta
AtomicParsley is a lightweight command line program that can read and set
iTunes-style metadata tags in MPEG-4 files & 3gp assets in 3GPP/3GPP2 files.
文章/文档 Level Crossing Rate in Terms of the Characteristic Function: A New Approach for Calculating the Fa
Level Crossing Rate in Terms of the Characteristic Function: A New Approach for
Calculating the Fading Rate in Diversity Systems
汇编语言 设计任务及要求 1. 以8255接八个开关K1~K8
设计任务及要求
1. 以8255接八个开关K1~K8,做电子琴按键输入。
2. 以8253控制扬声器,使用简易键盘,发出相应的音阶。
要求: K1—静音
K2—发si的音493Hz
K3—发la的音440Hz
K4—发sol的音392Hz
K5—发fa的音349Hz
K6—发mi的音329Hz
K7—发re的音293Hz
K8—发do的音261Hz ...
数据库系统 DataDraw is an ultra-fast persistent database for high performance programs written in C. It s so fa
DataDraw is an ultra-fast persistent database for high performance programs written in C. It s so fast that
many programs keep all their data in a DataDraw database, even whi le being manipulated in inner loop s
of compute intensive appl ications.
汇编语言 DESCRIPTION : 0.2S级三相电子式电能表 功能: (1)、LCD显示 (2)、内部通讯:通讯规约采用部颁规约(DL/T645-1997) (3)、红外通讯:通讯规约
DESCRIPTION : 0.2S级三相电子式电能表
功能:
(1)、LCD显示
(2)、内部通讯:通讯规约采用部颁规约(DL/T645-1997)
(3)、红外通讯:通讯规约采用部颁规约(DL/T645-1997)
(4)、日历时钟:采用软时钟(TA或TB)
(5)、停电或全失压时:低功耗模式3 ...
其他 AUTOMGEN runtime is an open source royalty free runtime for open PLCs. By using this runtime, any ta
AUTOMGEN runtime is an open source royalty free runtime for open PLCs. By using this runtime, any target systems can become compatible with the AUTOMGEN automation workshop: IEC1131 languages (ladder, SFC, etc.), 2D and 3D scada, WEB SCADA, etc
单片机开发 this MAX 7000 Programmable Logic reference book,in this book,you can learn how to usr the Max7000 Fa
this MAX 7000 Programmable Logic reference book,in this book,you can learn how to usr the Max7000 Family s
CPLD