Skip to main content

My Computer Notes

科技 Technology
电脑 Computer

  现今社会，谁家没有科技？算一算，一个家庭里至少都会有一个电脑，何况现在是行动管制令期间。

  这里要来记录有关科技的一切，而第一篇自然要先简单说明电脑的结构。

如何选电脑？

  作为一名学生族或者上班族，这必然是很重要的一课。我做过搜查，然后以下便是搜查来的资料：

1. What is your budget
这个将关系到电脑的品质，建议在两千至五千马币之间。

2. What to do with the computer
电脑用来做什么？玩游戏呢？还是做工作呢？或者是用于课业？

3. What is the performance
电脑的性能该是怎么样的？以下是一些需要专注的电脑性能：
Processor- Intel & AMD (Intel 5i for work and study)
Graphic card- integrated（耗电低又便宜） & dedicated
Hard disk- HDD（便宜，容量大，处理慢） & SDD（容量小，处理快）

4. How to choose screen
色域：70以上
分辨率：主流1080P, 4K屏 4096×2160
刷新速度：高

5. Which is the perfect brand
ASUS, HP, Dell, Lenovo, MSI
(建议HP 15-DA0006TX Black或HP Pavilion)

6. How much memory is required
最好是8G内存，不然就4GB RAM，ROM则越大越好

电脑的结构

  要知道怎么样使用电脑，那就得先认识电脑的结构，不然连开关键在哪都不知道！

1. Classification
Personal computer 个人型
小型电脑，microprocessor，键盘（input），monitor（output），storage device（save data）

Workstation 工作站
比起个人型的还要强，microprocessor较有力，品质更好的monitor

Minicomputer 迷你型
多用户型，可供10至100个用户同时使用

Mainframe computer 大型主机式
较强大的多用户型，可供100至1000个用户同时使用

Super computer 超级型
极速型，可于一秒内演示百至万的指令

2. Computer structure

基本结构：

Input→CPU→Output
键盘。             屏幕。
滑鼠。              打印机。
迷你电话。      扬声器。
                         投射器。

3. Computer system

Hardware

CPU:
Arithmetic & Logic Unit(ALU)
Bus Interface Unit
Control Bus

Timing and Control

Address bus

Logic gates

Memory:
RAM-SODIMM,SDRAM,DDR,DDR2,DDR3
ROM-
PROM,EPROM,EEPROM
Virtual memory
Cache memory

Storage device:
Hard Disk Drive
Solid Disk Drive

I/O:
Keyboard
Mouse
Screen

Software

Comments

Post a Comment

Popular posts from this blog

My Writing Notes

ESSAY WRITING Title: Intelligent Machines Machines have taken a huge role in our day-to-day lives. They can either affect us in a good way or in a bad way. Granted, machines have impacted many people in the workplace but they help us finish the jobs. There are many ups and downs to the development of machines. Some people have become so dependent on machines they start to lose their “humanity”. Machines can take away the personal aspect of life. For example, we lose basic courtesy, respect, and tolerance for people due to using machines so much. Some machines that could make that happen are; cell phones, computers, and video games. When people purchase one of these machines they usually are on it and depend on it all the time. Due to the lack of self-motivation through machines we could lose our common courtesy. In the workplace, machines have effected jobs dramatically. They can perform at low-skill repetitive jobs and at high-speed precise jobs. They mostly are better than huma...
Post a Comment
Read more

My Microbiology Notes 2

Lect 7  Microbial genetics 1. Genetic Material DNA & RNA DNA=deoxyribonucleic acid RNA=ribonucleic acid  Basic building blocks: Nucleotides Phosphate group Pentose sugar Nitrogenous base 2. Structure of DNA  Double stranded (double helix)   Chains of nucleotides   5’ to 3’ (strands are anti-parallel)   Complimentary base pairing  ◦ A-T ◦ G-C #Prokaryotic chromosome 3. DNA Replication  Semiconservative ◦ Replication fork  Single origin  Bidirectional  2 Leading strands  2 Lagging strands  Enzymes  Helicases  DNA polymerases 5’ to 3’  I for leading strand  II RNA primer  III for lagging strand  DNA ligase  DNA gyrase  DNA is unzipped by unwinding enzyme helicase  RNA primer join at the replication site  This primer gives signal to enzyme DNA polymerase to synthesize new DNA strand • One new DNA strand (Leading strand) is synthesized continuously in the 5’ 3’ direction  • In contrast, the lagging strand is synthesized...
Post a Comment
Read more

My Biology Notes Example

Biology笔记可以这么做，这是Example: Cell Structure and Cell Organization 1. Cell Structure and Function Cell Structure and Abundance of Organelles in Specific Cells. Cells are basic units of all living organisms. Comparison between animal and plant cell. Exercise Paper 1 Paper 2 Section A Section B 2. Cell Organization Unicellular(one cell) organisms Multicellular(many cells) organisms cell ￬ tissue : similar cells, similar function ￬ organ : composed of tissue, specialised function ￬ system : several organs cooperate to carry out a living process ￬ organism : made up of all system 这三个mindmap是从网上搜来的。 Exercise Paper 1 Paper 2 Section A Section B 3. The Uniqueness of the Cell Formation of extracellular enzyme. Nucleus→Ribosomes→Transport vesicle→RER→GA→Secretory vesicle→Plasma membrane 4. K-BAT Explain why inner membrane of mitochondria is in the form of numerous folded layers. To increase surface area fo...
Post a Comment
Read more