Though there are many hearsay, the former expected iPhone5 product is not released.  However, researchers think iPhone5 will be released with the iOS5.

The cloudy service called ‘iCloud’ is a break out. Analysis thinks it will let apple take over more cloudy service market. Apple users can use iCloud to backup all their files for free. Apple offered a 5GB free file volume for each user. Users will be able to purchase more volume sooner. Apple build up a big Data Center in  North Carolina.

The powerful services and functions bring by Apple makes its phones perfect gadgets. The iCloud is no doubt another fascinate service.

There are reason to believe that iPhone will gain more users because there will be no worry about losing any important data you Apple gadgets. I’m also a iPhone fan though I don’t have any apple products now. But I think it’s time to sell phone, I’m using now, the time I get enough money for a new iPhone.  Compared with iPhone, the BlackBerry is so weak.

While the right web hosting plan plays a crucial role succeed on  e-business.  After reading this post, you should gain a sense on how to choose the suitable server plan for your online business.

Shared Web Hosting: Shared Web Hosting plan means you share one server and one server OS with many other websites. Some of this plans offer a private for each user. The advantage for this plan is simply cheap. This hosting plan is not recommended for a online business website only if your budget strain or you are not ambitious and  just want to run a very small business.

VPS: VPS is short for Virtual Private Server. In this plan, the server is  distributed by software and each user use a private IP, Operation System, Database, CPS Sources and so on. This plan makes users use it like a private server. In my opinion, this plan is suit for most e-commerce websites if they are not giants.www.zhangpeng.info

Dedicated Servers: It’s a solution offered by server manage company. Users rent a server from them and paid monthly. This plan is for those websites who need powerful hardware support. Monthly payment is also budget saving.

Managed Hosting: Managed hosting is so much like dedicated servers.  Customers can require a customized solution on manged hosting is the  difference. The payment period is also differ from dedicated servers.

Colocation: Some companies may purchased their server before. So the hosting provider many offer colocation plan. This plan is just for those who own a server prior to choosing a hosting provider.

Above all, different company need to choose different server plan in order to perform their websites excellent but budget saving.

中文黑莓评测参考：你有一千个理由不购买黑莓手机

As for a business aimed brand, blackberry is popular with people in North American. Obama is also use BlackBerry 8830 as reported. But it seems not meet Chinese market’s requirements especially in individual field. The not cheap price plus weak functions makes it not a good choice for most people.

Note: All of my opinions given here based on my experiences  on using blackberry 8830. My cell phone is purchased at ebay and unlocked by myself.

1、Renewed, substandard produce, etc. makes blackberry not a good idea for new buyers

As balckberry don’t have any official shop in China, also with the weak cooperation with China Mobile,  blackberry is not accessible for any consumers. So some business man get them from some illegal ways or use some used or substandard produces to cheat consumers. The best idea is to ask a friend who knows much about blackberry to help you choose or you may find you being cheated by seller. Surely, choose those sellers with most positive feedbacks will lower your risk.

2. The very weak Chinese input method

I don’t know the real reason why  RIM can not offer a perfect Chinese supported OS as well as Chinese input method. After all, blackberry can not support Chinese well. Blackberry 8830 even don’t provide a Chinese OS. It directly cause I can’t use a default Chinese input method.

As I need SMS others, I tried to find a solution. I once used 8820 Chinese ROM installed in my 8830. It do works. But every time I use Desktop Manager to install any software, it will automatically reinstall a comparable 8830 English OS in my cell phone. Finally, I installed a Chinese input software to solve this problem. However, I get many work to do for just replying a Chinese SMS. This is how I can reply: forward a Chinse SMS -> Clear field->Open Chinese input software->Input Chinese words->Close Chinese input softwar->Paste content->Sent. You see this is a very complicated process. And I can only forward a Chinese SMS. If I forward a English or Number SMS, the receiver will just see some ‘?’ instead of each word.

3. Frequently shut down for no reason

During my experience of using blackberry 8830, it frequently shut down for no reason. Maybe it is caused by my unlocking strategy. But more likely is caused by a unstable operation system. My blackberry shut down almost once a day or more. And you don’t know the exact time when it will shut down. Maybe when you are making a call or maybe during night.

4. Bad hardware quality

I just prefer the navigation ball of blackberry. But it finally turn a uselessness. It can’t perform good after one or two months. And the paint on my cell fade after no more than 4 months.

5. OS and Software is not strong enough

The operation system for blackberry can never be perfect. It doesn’t support enough entertainment function. And the supported software is far fewer than Iphone or Android can support. So, if you want to buy a phone with rich entertainment functions, blackberry is not a good idea.

6. Unlock

As I use my blackberry in China, I need to unlock my blackberry in order to let it support a China Mobile SIM card. It takes me hard work to achieve it.  There are not so much information you can turn to on the Internet. So, make sure the blackberry is unlocked before you make a final decision.

All these reasons above makes me suggest you make a careful decision if you want to purchase a Blackberry Cell Phone for your next cell.

Safety

Safety comes first for a baby car seat. Not like an adult, your kids face more danger in a moving machine. Safety belts can not suit your baby and airbag even be extremely dangerous when it come to a baby. So a car seat for baby is designed. When you are going to purchase one, it should be the safety comes first.  Do a safety research on each car seat you made as a choice.

Never not think about a used car seat just because it save money. This idea may turn to a huge loss after a crash.

If you are not so clearly about safety, refer to www.car-safety.org. They are expert on safety.

Comfort

Yeah, I know you want your baby has a comfort seat during the time on your trip to shopping mall. Otherwise, you will get a bad experience as your baby will weep all the way. There should be proper padding around the seat and additional head and neck support for infants.

Easy Installation

I have seen once a time in my company. There is a car seat supplier promote their new car seat. What a pity as there are few engineers know how to install their new proud product correctly on our vehicle. Even their instruction book can not help much.

But using your seat incorrectly endangers your child. Make sure you know how to work it. So just choose a simple car seat which is easy to install correctly. www.zhangpeng.info

Convertible

If you buy an infant-only seat, you’ll have to buy a rear- or forward-facing seat later and it cause a further cost. The convertible car seats are versatile and last the longest. These car seats are will accommodate a growing baby from infancy through his or her early toddler years, but remember fitting a car seat depends on weight and height not age.

Price

Price is always one of the concerns when we doing a purchasing research. But I lay it to the last thing come up in our mind. Do not concentrate on the cost. You should know a good car seat means a lot to your kids which can not evaluated by just money. Choosing a kind of car seat first and then compare price difference between various stores.

Best wordpress theme

I said “best” just to inform you that you should choose your wordpress theme carefully. Common users are likely to judge a website based on its lookout and contents. And a good lookout always comes first. While its not so absolutely said, if your blog seems ugly, it may loose many of its users it should attract.

So that is why I suggest you to choose a professional wordpress theme when starting to run a wordpress blog. A professional theme will add much attraction to you weblog.

You can pay for a perfect theme. But most time, especially at the beginning of blogging, best free wordpress themes may be your prefer. You don’t need to pay for so much money on a good looking wordpress theme at the beginning while you can improve your blog theme during the time you are running it.

Best wordpress hosting

As when your blog will attract big traffic, a good web hosting which can run perfect under a heavy burden is crucial for your success. When your user can not open your site within about 1 minute, it is dangerous that you will loss most of your readers. People are so busy that they don’t want to way for a long time just wasting on opening a web page. They will try to find another sources where they may get a similar information through Google or Yahoo as there so powerful search engines which will give all what they want.

Surely there are many good web hosting services providers. But if you need to purchase a good wordpress hosting, you can check this page for a hosting option : best 10 wordpress hosting.

Best content

After build your blog, the most important thing to achieve your goal is build up value added content. Good website will never be a site just give out junks. Write useful content and stick on your blog  major will let you succeed soon. A blog without good content will never be a good blog even if it use the best web hosting or with perfect  look.

Best content comes from your primary focus. Stick to your major field and expand as you are really sharing useful informations. Take care of your blog like your career.

中文用户可以浏览：无油涡旋压缩机国内外研究现状

Scroll compress another efficient positive displacement compressor after reciprocating compressors, rotor compressor and screw compressor. It’s know as the most advanced continuous compressor. This kind of compressor are known for operating more efficiently and quietly than conventional compressors. Compared to pistons, its main component is only 10% of the former, the volume reduced about 40%, efficiency improved 10%, weight is only 85% of the former.

With the development of industry, clean air is needed in some particular field. At this time, oil free compressor become the major option. Because of the advantages of oil free scroll compressor, it becomes the focus in the resarch of compressor.

Oil free compressor was founded between 1920s and 1930s. Sulzer Brothers Ltd., from Swiss, first patented Labyrinth seal oil lubrication compressor. At the beginning of 1950s, first oil free compressor appeared on the market. Shenyang air compressor factory and Lanzhou Institute of Chemical Physics, CAS, are the two institutions which engaged in researching oil free compressor first in China.

The oil free compressor has very favorable prospect of development. The first factory, which produce oil free compressor , in China, estimated to make about 5 billion in after 2011 when it go into full operation.

However, research on oil free scroll compressor is still fairly few. It faces many shortages. How to seal and lubricate remains the big challenges in improving its efficient. Compared to compressors work with lubricant oil, the leakage is much bigger.

In order to lubricate without oil, we need to inlay self-lubricatingmaterial. The most popular self-lubricatingmaterial are PTFE, PEEK, PESF and PES.

The old experience and the traditional method of 2-D design remains the major methods for design and manufacture. But these two methods have the same shortage of inefficiency and long development cycle. So it can not meet the needs now. To find a new method becomes important.

中文用户可以查看中文版：无油润滑涡旋压缩机设计计算步骤

Disclaimer:

This calculation method is suit for designing a compressor that you know the compressor displacement Q_d (V³/min) and suction pressure p_s as well as the exhaust pressure p_d (MPa). And according to a Chinese paper “Choice of Bask Geometric Parameters and Structure Parameter,λ=h/Pt , on a Scroll Compressor” by Gu Zhaolin, published on “Compressor Technology”, 1996, we choose Pt、t and h as bask geometric parameters. So I modified the calculate steps to this method:

1. Calculate the indicated power of electromotor. P_i (Kw)

equation for calculating the indicated power of electromotor

You can find this equation in document [2] at page 62. In this book, it use  kgf/cm² as unit of pressure. So I made a small change in order to change the pressure unit to IU MPa.

2. Compute motor power P_e (Kw)

The leakage and friction factors concerned, shaft power Pz can be counted through this equation:

P_z=1.12P_e

Make sure there are about 5%～15% power reserve, the motor power Pe should be:

P_e=(1.05～1.15)P_z

3. Select motor speed n_w, it should be between 1000 and 4000r/min

4. Calculate the exhaust volume V_d (m³/r)

V_d=Q_d/(i*nw)

‘i’ in this equation is a parameter defined by the amount of compression chamber. If there is just one orbiting scroll and one fixed scroll, i should be 2. For compressor with Z orbiting scrolls and fixed scrolls, i should be 2*Z.

5. Calculate the suction volume V_s (m³/r)

Use a ideal gas model to simplify the calculation and assume the cycle as adiabatic. So:

pV^k=C

k is the adiabatic exponent of working medium or refrigerant. The adiabatic exponent is 1.4. The suction volume can be defined:

equation for calculating the suction volume of scroll compressor

6. Geometric interior volume specific ratio ε_v

ε_v=V_s/V_d

7. Select  scroll pitch P_t(mm), scroll width t (mm). t should be 2～6mm

8. The angle that the involute beginning α (rad)

α=pi*t/P_t

pi=3.1415926535 897932

9. The maximum angle of involute Φ_e(rad) and the exhaust angle θ_d(rad)

ε_v=(2*Φ_e-3pi)/[2(Φ_e-θ_d)-3pi]

equation 1 for calculating the maximum angle of involute Φe and the exhaust angle θd

equation 2 for calculating the maximum angle of involute Φe and the exhaust angle θd

You will get the answer by combine the three equation. You may need tools like Matlab to get the  result. http://www.zhangpeng.info/

10. Scroll height h (mm)

V_s*1000000=P_t(P_t/2-t)h(2Φ_e-3pi)

You should adjust your parameters to use unit of ‘m’ other than ‘mm’. But I defined all the distance use the unit of ‘mm’, so I plus a 1000000 to make the change.

11. Check λ=h/P_t if it appropriate

Some paper said λ should between 1.5 and 2.5. If the λ you gained exceed the limit, duplicate step 7-11.

12. Radius of basic circle R_b (mm)

R_b=P_t/2pi

13. Radius of shaft circle R_or (mm)

R_or=(P_t-2t)/2

14. Balanced design of orbiting scroll.

15. Choose a oil-free format and the self-lubricatingmaterial

References:

1、刘振国.涡旋式流体机械与涡旋压缩机[M].机械工业出版社. 2009

2、编写组.活塞式压缩机设计[M].机械工业出版社. 1974

3、Gu Zhaolin, Yu Yongzhang. 涡旋压缩机设计计算研究[J].流体机械. 1996.2

4、Gu Zhaolin. Investigation of Scroll Compressor Design[J].低温工程. 1996.1

The pen warehouse provide you Promotional Pens. There are great gifts for childrens. It also can be games rewards on company annual meeting.

All these references are written in Chinese, you ask me if you have any question during reading these references.

中文用户请转移至：黑莓8830解锁方法及程序下载

I now want to share my experience on unlocking blackberry with peoples who want to use a locked blackberry. You should know, this free solution can not have effect on any model but some special models. As far as I know, MML can not unlock blcakberry 8820, 8900, 9500 and 9530. This unlocking progress can be splited into four steps. First is download softwares and install them into your computer. The second step is restoring blackberry. The third one is using MFI to unlock cell phone. Certainly, you need to install a new OS on your device.

1. Download softwares and intall them.

There are three applications you must use in unlocking a phone. They are BlackBerry Desktop Manager, .NET framework2.0 and MML. Some times, you may also need to download a few dll files.

Desktop Manager can be accesed at their official website. Go to download page here.

.NET Framework2.0 is a free soft by Microsft. Go to download page here.

I packed two MML files for you to choose:

A simplified edition for just 8100, 8110, 8120, 8200, 8300, 8310,8320, 8350, 8700, 8707, 8800, 8830 and 9530. Click here.

A complete MML file for most model. Click here.

Or you may need some dll files. Get them here.

If you find any problem in downloading files, contact me by leave a comment. I can send you one by email.

2. Restore blackberry

Use loader file to renew your phone to Factory OS. By click file name by specific model under HHFiles folder. For example, if you want to unlock a 8830, double click loader 8830.bat. You will continue with the third step when you see “No Application Linked” on the screen.

3. Unlock cell phone with MML

Please disconnect your network before you starting this step. You will see some error in runing MFI when you connet network. Follow this tips:

1. Copy all files to C: directory.

2. Open folder ‘bin’ and double click register.bat.

3. Double click bulding.bat

4. Run MML.exe

Uncheck Auto start.Click start and wait. About ten minutes later, you’ll see a big “1” on your phone screen and a “PASS” on MFI. When you see these, it’s to say, your blackberry is successfully unlocked.

4. Reinstall a OS

Do you still remember I suggest you download Desktop Manager? Use this to reinstall a new OS one your phone and all things get done.

Frequentlly appeared problems and solutions:

1. Cannot create CFP instance. Please ensure the BBCFPCOM driver is registered

You can download the simplified MML edition and run the buding.bat. Or you can do it yourself by input these code in Command Prompt Only:

regsvr32 c:\mml\bin\BBCFPCOM.dll
regsvr32 c:\mml\bin\GRSNVLibCOM.dll
regsvr32 c:\mml\bin\RIMRadioCOM.dll

2. NV library failed to load PRL file. Cannot find PRL-14672-001 on the server

Also I added all these files into the simplified MML edition.

3. Can not find ceutil.dll or rapi.dll in your system

Download them here. I packed the two dll files.

If you get problem during unlocking. You may check :

For anybody has problem to unlock by this method, it is because the new BDManager. You need to copy the file BbDevMgr.exe from c:\mml\bin to C:\Program Files\Common Files\Research In Motion\USB Drivers to replace the original one. Now, the unlock works like a charm…….

as Chris comments below.

The same unlocking manual book is posted on GadgetMech: How to Unlock Blackberry With MFI. You can download the simplified MML edition from there.

Make as whole theme

A theme contains much IDs. The id couldn’t appear twice protocol don’t allow it.  Make wp theme as a whole let you make less mistake.

Separate theme into models

This is a good way to let your theme have a great structure. For example, WP define a theme into Header, Siderbar, Footer and so on. And models can let you write codes more efficiency.

Optimize codes

Use less code. You can combine same CSS properties. For example, define a left tag like .left { float:left;} and use it when you need let a DIV float left.

Check compatibility

A site with error codes will never be trusted by users especially those webmasters. You may need to make your theme fit W3C standards. And make sure all data look correct.

SEO

Many wordpress users do not just write blog for themselves. So the may think of traffics when choosing a wp theme free. Put entry title front of blog title. Your title looks in search engines should be this format: post title + blog title. Add meta tag. Add keywords and description in your header tag. The third tip is to think about how to use <H> tag.

There are two kinds of wordpress themes: free or not free. I do think most blogger wouldn’t pay much for a blog theme. You may find some free services at most time. So where to get some great wordpress templates?

There are three ways you can get a free template.www.zhangpeng.info

First, you can find some great free template at wordpress.org. Many wordpress fans submit their templates here for users to download for free and get some honor.

Second, you can search for some free template directories. There are many websites collect some great template that wordpress.org don’t shows.

Third, ask a friend who know how to create wordpress template for a free one. Or you can ask me a wordpress theme and just buy me a coca cola. I will be happy to help you.