cloud

问题 I have a cloud of points scattered in a 2D Euclidean space. I would like to calculate the area inside the polygon linking the most extreme (=peripheral) points of the cloud. In other words, I would like to estimate the area covered by the cloud in this space. Is there a formula in R? Thanks a lot for any response Julien 回答1: This is called the convex-hull problem; R built-in chull function should do the work. To count area, you may use a formula from here. EDIT: Even better; splancs package

问题 What's the difference between zookeeper vs spring cloud config server? They both store configurations in server and make them available to clients. When should one be used over the other? 回答1: What's the difference between zookeeper vs spring cloud config server? With the Spring Cloud Config Server you have a central place to manage external properties for applications across all environments. The concepts on config server map identically to the Spring Environment and PropertySource

问题 What do you see as the advantages and disadvantages of Amazon Web Services S3 compared with Google Application Engine? The cost per gigabyte for the two is, at the time I ask, roughly similar; I have not seen any widespread complaints about the quality of service; so I think the decision of which one to use may depend on the API (of all things). Google's API breaks your content into what they call static content, such as your CSS files, favicons, images, etc and non-static dynamically

问题 I'm trying to implement a cluster using Erlang as the glue that holds it all together. I like the idea that it creates a fully connected graph of nodes, but upon reading different articles online, it seems as though this doesn't scale well (having a max of 50 - 100 nodes). Did the developers of OTP impose this limitation on purpose? I do know that you can setup nodes to have explicit connections only as well as have hidden nodes, etc. But, it seems as though the default out-of-the-box setup

问题 NoSQL databases like Couchbase do hold a lot of documents in memory, hence their enormous speed but it's also putting a greater demand on the memory size of the server(s) it's running on. I'm looking for the best strategy between several contrary strategies of storing documents in a NoSQL database. These are: Optimise for speed Putting the whole information into one (big) document has the advantage that with a single GET the information can be retrieved from memory or from disk (if it was

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . On Windows Azure Portal ( as of Jan 2013) What do i get when i scale the Windows Azure Website instance from 1 to 6? Does it mean there will be 6 physical instances of my website on the same server? In IIS terms are there 6 running websites all automatically load balanced? But judging from the help text it

问题 I am new to Parse.com and trying to the quick start project. I am following each and every step to build an app on android platform. But I am getting "no data yet" message everytime I click on Test button . What I've done so far is: MainActivity: public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Parse.initialize(this, "AMRjGNY53W2HFZILS7M64rZy3b8mSz3qGkf1KeOE",

问题 I am new to azure cloud service. I want to publish nodejs (express) api on as azure nodejs cloud service. I follow below link to create express app in nodejs. http://azure.microsoft.com/en-us/documentation/articles/cloud-services-nodejs-develop-deploy-express-app/ Above tutorial is very good. I am able to create express app and i run successfully on azure emulator. Problem :- But when i publish on cloud it also published successfully (hope so) but when i am trying to open web-service URL , it

问题 I am looking to take the Cloud Carousel by Professor Cloud on http://www.professorcloud.com/mainsite/carousel.htm and make it scroll vertically. I can see that reflections may be an issue with a vertical scroll and if they are that's okay, I can do without them, I'd like an option to enable them if possible. Thanks for all of your help. (I need it to fit here: http://www.inspiritandintruth.com on the right bar.) 回答1: I have the same problem. I found these two that have the same 3d effect and

问题 I've started to use Google Cloud SQL and I need to improve my IOPS and network speed. I've seen that this it's only possible improving the type of machine and/or improving the size of disk. And this is my question. In my case, I need to migrate 2 MySQL databases (from 2 different projects) and I don't know what is better: 1 big instance with 2 databases? 2 small instances with the database in each instance? or 1 regular instance + 1 read replica instance? Thank you in advance! 回答1: The answer