2022年1月27日 星期四

倉頡輸入查詢

src :  

https://www.hkcards.com/cj/cj-char-%E9%BC%A0.html

notes:

prons:

- It's a good website to let you inquiry how the 倉頡 code combination for a Chinese character.

Ex: 繩 , how you know it consist of 女火口難山

cons:

- Expect to have character analysis for Simplified Version as well

2018年4月14日 星期六

C++ & Java Comparison



Function Pure Virtual or Abstract:

  • (Java) : abstract func( ... ) 
  • (C++) : virtual func(...) = 0
        ps : if virtual func(...){...}  --> this is okay to use the base function

2017年6月18日 星期日

HW Utility : PCB Viwer

src:
https://www.zuken.com/en/products/pcb-design/cr-8000/products/bv (pcb)

notes:
NA

Bus Analyzer : Bus Hound


src:
http://perisoft.net/bushound/details.htm

notes:
a good utility for BUS analysis and emulation

2016年10月1日 星期六

IoT Cloud Solution

mot:
[16'10/2]:
   - find solution for IoT cloud service

src:
[16'10/2]:
  http://www.digikey.tw/zh/articles/techzone/2014/aug/mcu-vendors-make-iot-connections-to-the-cloud-practically-plug-and-play

ref:
[16'10/2]:
  http://electronics.stackexchange.com/questions/28792/what-is-dual-quad-i-o


notes:
[16'10/2]:
  - LAMP is not feasible due to security concern. Ex: DoS,
  - solution w/ security communication : SSL/TLS
   - Encrypt : AES, DES, CRC, SHA, MD5 
  -  MCU w/ security module : PIC32MZ EC (Microchip Technology)  , Tiva C (Texas Instruments) 
   - SQI is flash interface w/ 4 IO could have 4 times speed than SPI. No mater 1,2,4 line communication, they are still half-duplex instead of full-duplex
   - IAAS/PAAS provider : Amazon, Salesforce, Microsoft, IBM, Google, Fujitsu, NTT, AT&T, Verizon, Deutsche Telekom
...etc.

TODO:
[16'10/2]:
  - keep to track solution w/ security & account management.

2016年2月1日 星期一

2015年9月6日 星期日

Hadoop



Commetns:
- distributed architecture for compunting & storage
- could run in 3 modes : standalone , pseudo districuted, fully distributed
- client-server architect :
Server : run Name Node + Job Tracker
Client : run Data Node + Task Tracker
- the execution liverage counts on : MapReduce which is executed in slave side
-  HDFS is the filesystem used in hardoop, it will be kept in 3 different place. 2 is near-end side and the other is in far-end side
- HBASE is like a database could use for saving data after Reduce


Reference book:
- Windoop應用實作指南-掌握Hadoop翱翔雲端 by 許清榮,林奇暻, 買大誠


Thinking:
- if our traget data is distributed everywhere, maybe it's a way to handle locally and migrate.
- the point is map & key, the application must be divided & indexed via a key.