communication

问题 I am new to MPI and I am trying to manage arrays of different size in parallel and then pass them to the main thread, unsuccessfully so far. I have learned that MPI_Gatherv(const void *sendbuf, int sendcount, MPI_Datatype sendtype, void *recvbuf, const int *recvcounts, const int *displs, MPI_Datatype recvtype, int root, MPI_Comm comm) is the way to go in this case. Here is my sample code, which doesn't work because of memory issues (I think). #include <stdio.h> #include <stdlib.h> #include

问题 I'm considering using 2 NSStream for up/down channels. However, it looks somewhat complex. If you know simpler way (or recommendations) to do this, please let me know! -- edit -- This is a kind of fast prototyping of internal/in-house remote controller. Low latency is best, but not required. Binary formatted data, but not so heavy. Most of them are short control messages, and sometimes big chunks exceptionally. On Cocoa / Cocoa touch. Platforms are limited to them. Two peers are on LAN or at

问题 How do I pass data and messages between 2 Firefox Add-Ons (the way Google Chrome does it, here)? 回答1: All Firefox add-ons share the same global scope when you do an overlay (which essentially every add-on uses). You just need to create some shared object to pass data back and forth on. 来源： https://stackoverflow.com/questions/2869477/communicating-between-2-firefox-add-ons-cross-extension-communication

问题 I need to send data form one process to another. Constraints : Sender process is very expensive call. It needs to be done using vbscipt. For Sender process,this data transferring is an additional work.It shouldn't get affected much by this feature. There are around 1000 threads in a sender process in 4-5 mins. Faster IPC is important.If it can be done asynchronoulsy it will be better. I read about the named pipe.Is it possible to open a named pipe using vbscript .Also is there any other

问题 I want to develop an App that requires wired communication between Web cam type video camera and iPad2. Basically I will directly connect Web cam and iPad2 using cable and when I start web cam, whatever images(picture/video) captured by web cam should be displayed on iPad2. Based on my research on this I found that iPad2 cable is only made for iPod Program so the connector is not a traditional USB port I can't do direct communication between web cam and iPad2. Am I missing anything? We are

问题 I am in the process of developing a project that will require communication both ways between a ASP.NET website and a C# Application. For example if I wanted to click a button on an ASP.NET webpage to retrieve the status of something. How could I implement this communication between them? Please note I have never used ASP.NET before, hence my question. 回答1: You can use same database in both website and application. If you want to transfer something from application to website, like a file,

问题 We can use any tag of our choice in XML. If we have a DTD and style associate with it, we can parse it in browser. We can transfer data in XML format. But if XML tags are not fixed like HTML, how two systems come to know each other's meaning of the tags while talking (ex web services)? How can XML be a general data exchange language on the vast Internet?? 回答1: XML is a general language but pretty much any communication using XML will use a specific XML application such as XHTML, RDF, Atom,

问题 I'm trying to open a serial communication between Scilab and Arduino. However, Arduino is always recognized by Linux Ubuntu in the /dev/tty**ACM0** port. When I write h=openserial(1,"9600,n,8,1) in Scilab I know that I'm saying to it, to open a serial comunication to COM1 or /dev/tty**S0** in Linux. But, for example, if I use h=openserial(N,"9600,n,8,1) , assuming N=port number , I will always have COMN, in Windows and /dev/tty**S**(N-1) in Linux. How do I open a serial comunication through

问题 I have two WPF applications, I need these two applications to be able to communicate with each other. I just need these applications to send some notifications to each other and nothing more. I have found two techniques yet, one is using WCF, and another is using DDE. But to me these seems too much complicated for my requirement. Please suggest what is the simplest way to go about this? What other options I have? 回答1: If they are both on the same network(otherwise you need to port foward the

问题 I've made an app which connects to Arduino Mega 2560 by means of HC-05 Bluetooth module. I succeed in giving commands to Arduino via bluetooth, but the opposite communication doesn't apparently work. I don't know if the problem is in Arduino or Android side. Arduino sends messages with this simple instructions: #include ... SoftwareSerial bluetooth(12, 11); void setup(){ Serial.begin(9600); bluetooth.begin(9600); ... } void loop(){ ... bluetooth.listen(); while (bluetooth.available() > 0) {