使用和原理的英文

个人意见数据结构数据库系统原理（数据库原理及应用可不学）数据库原理与实践网络数据库设计（数据库应该不是一门课程吧）我们学校的课程安排c语言----数据结构（c语言版）------数据库原理及应用(王--萨版)（实验课用的是oracle9i）----然后在这个基础上讲了几节分布式数据库的课程

The design is divided into three parts, namely, schematics, circuit diagrams and instructions for use, and where relevant, to note. When the drag conveyor belt runs empty containers to the appropriate location, the use of limit switch accurate positioning, the conveyor belt to stop a conveyor belt at the same time connected to another product with the conveyor belt running from the sensors into the box the product count, and the display displayed. Sensor selection infrared sensor, through the product through the infrared to count the number of times. Whenever to a product, it will produce a corresponding pulse, send it to your counter. Composed of 8421 yards with CD4518 counter synchronous decimal counter, because CD4518 contains two identical counters, can be first-class Q4 output then the second pole of EN-side to form two serial counting, to achieve a count of 0 ~ 99显示. Through the sensor sensing sensors, counters count, the numbers displayed on the monitor. Decoding circuit using two CD4543, were grouped into seven-segment BCD decoder, drivers, LED digital display. In addition, the use of two auxiliary circuit indicator light on the two motors to display operation status, helping to repair the circuit fault. Keywords: trip switches, infrared sensors, counters, displays, light

Solar power is the use of solar energy battery components directly into electrical energy.Solar power systems work by converting the Sun's electromagnetic energy into either solar thermal energy or solar electricity.Solar electric systems create solar electricity using solar power panels. The DC electricity generated by the solar panels is converted to AC current and can be used by all of our household appliances.太阳能发电是利用太阳能电池组件直接转化为电能。太阳能发电系统通过太阳的电磁能量转换成太阳热能或太阳电能。使用太阳能电池板发电系统可制造太阳能电。由太阳能电池板产生的直流电可转换为交流电流，可被所有的家用电器使用。