Share008資訊科技公司

我是資深的電腦資訊從業員,曾於 Motorola 及 Philips 等跨國大型公司管理層工作十多年,具各類ERP資源管理系統及其它應用系統經驗,如QAD之MFG/PRO、SAP、Ufida(用友)、Kingdee(金蝶)、Microsoft's Dynamic、Wonderware's In-Track (SFC)、Webplan (SCM)、Hyperion (business intelligence)、Informatics (Data Warehouse)...等等。另外,我精於廠房車間之電腦資訊運作,擁有 CISSP 及 ITIL 認證,能提供日常資訊運作之檢測及審查,以提高操作效率。 本人誠意為各類大中小型廠房提供資訊審計、支援及意見,歡迎聯絡,電郵為 au8788@gmail.com

「ERP資源管理系統」已是現今廠房管理必不可少的工具,提高它的效能,絕對能改善公司之盈利,請多多留意。

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提供香港股票價位歷史數據

我想很多人會對"香港股票價位的歷史數據"有興趣,我已下載成Microsoft Access database version 2000 的文檔,資料由2008/1/1至2009/12/2,zip壓縮後也有11M,若索取請留你的PM我 。

祝願各瀏覽者股壇威威!

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2016年6月9日

Power Calculation for UPS Selection

Power calculations is approx as below example:
- 2 x Billion 7300GX modems 2 x (12V * 1A) = 2 x (12W) = 24W
- 1 x Linksys RV082 router (240V * 0.2A = 48W)
- 1 x 24 port HP Procurve 2524 switch (approx 36W)
- 1 x Dell PowerEdge 2850 with 2 x CPU's and 4 x hard drives (700W max)
TOTAL = 808W

Because 1.4VA = 1W (approx), those devices would consume 808*1.4 = 1131VA
Support using a 3000VA UPS, it can last for 2.6 hours (approx 3000/1131)
With a 5000VA UPS, it can last around 5000/1131 = 4.4 hours

In actual case, with respect to run time, it is not the 3000VA or 1000VA that determines your runtime – its the capacity of the batteries. You can get a 3000VA UPS with quite a small battery (= short runtime) and you can get 1500VA UPS with additional plug-in batteries for super long runtime. For example, a second hand 3000VA UPS from ebay might have the ability to support 15A of load but the shagged out batteries may give you less than 5mins of runtime. Hence, you have better check the UPS configuration from vendor web site.

3KVA is the maximum load the UPS can handle.
The AMP HOUR rating of the battery system is what determines runtime.
eg a 12V battery with a 7AH rating will run a 12V 1A load for 7 hours, or a 12V 2A load for 3.5 hours.
7AH/1A = 7 Hours
7AH/2A = 3.5 Hours
Our 12 V Sealed Lead Acid (SLA) 7AH battery has an energy density of 12V at 7Amps for 1 hour = 84Watt Hours = 5040 Joules.
except that's not quite correct because of battery aging.
In most cases, it would recommend a max of 2 hrs for commercial installs. This is because AC and lights, phone system are also off, resulting in H&S issues. For home use, it would recommend 30 min max.

Runtime Example from UPS vendor web site:

2016年5月29日

中國城市級別

中國一線城市  4個
北京、上海、廣州、深圳
中國二線城市  31個
例如:南京、成都、天津、重慶
中國三線城市  35個
例如:洛陽、溫州、吉林、三亞

2016年5月23日

2016年5月19日

Problem to create virtualenv for python3

Error of creating a virtual environment under LINUX with command:

virtualenv env3 --python=python3

The error message is as below:
...
Installing setuptools, pip...
  Complete output from command /home/swamydkv/py_virenv/test/bin/python3 -c "import sys, pip; pip...ll\"] + sys.argv[1:])" setuptools pip:
  Traceback (most recent call last):    
  File "<string>", line 1, in <module>
  File "<frozen importlib._bootstrap>", line 1565, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1532, in _find_and_load_unlocked
...
 
Solution:
uninstall virtualenv  -->  sudo pip uninstall virtualenv
 
reinstall virtualenv  -->  sudo easy-install "virtualenv<1.11"

do not reinstall using command  --> sudo pip intall virtualenv , it does not work.
 
 

2016年5月5日

List of popular open source cms application

List of popular open source cms application as below:
Drupal
Expression Engine
Wordpress
Umbraco
Sitecore
Ektron
Joomla
Teamsite

Recently, I found one more cms application --> python + django-cms.

This django-cms includes all the common features as below:
Page & Menu Creation
User Management
User Permissions
Page Moderation
Multi-site
Multi-lingual
Frontend Editing
Plugin system

Reference Link:
http://www.django-cms.org/en/
http://docs.django-cms.org/en/latest/