Qt-Based C++ Project Works If Run From cmd.exe But Not From Within Qt Creator
来源： https://stackoverflow.com/questions/63368262/qt-based-c-project-works-if-run-from-cmd-exe-but-not-from-within-qt-creator
visa
H-1B visa - H-1B 签证
H-1B visa - H-1B 签证 1. H-1B visa - H-1B 签证 The H-1B is a visa in the United States under the Immigration and Nationality Act, section 101(a)(15)(H) that allows U.S. employers to temporarily employ foreign workers in specialty occupations. A specialty occupation requires the application of specialized knowledge and a bachelor’s degree or the equivalent of work experience. The duration of stay is three years, extendable to six years; after which the visa holder may need to reapply. H-1B 是根据 《移民和国籍法》 第 101(a)(15)(H) 条在美国签发的签证，该签证允许美国雇主临时雇用外国工人从事特殊职业。专业工作需要应用专业知识和学士学位或等效的工作经验。停留时间为三年，可延长至六年；之后
How to Wait on Service Request (RQS)
问题 **Note: Cross-posted at LabVIEW forums: http://forums.ni.com/t5/LabVIEW/C-VISA-wait-on-RQS/td-p/3122939 I'm trying to write a simple C# (.NET 4.0) program to control a Keithley 2400 SMU over VISA GPIB and I'm having trouble with getting the program to wait for the Service Request that the Keithley sends at the end of the sweep. The sweep is a simple linear voltage sweep, controlled internally by the Keithley unit. I've got the unit set up to send a ServiceRequest signal at the end of the
How to Wait on Service Request (RQS)
问题 **Note: Cross-posted at LabVIEW forums: http://forums.ni.com/t5/LabVIEW/C-VISA-wait-on-RQS/td-p/3122939 I'm trying to write a simple C# (.NET 4.0) program to control a Keithley 2400 SMU over VISA GPIB and I'm having trouble with getting the program to wait for the Service Request that the Keithley sends at the end of the sweep. The sweep is a simple linear voltage sweep, controlled internally by the Keithley unit. I've got the unit set up to send a ServiceRequest signal at the end of the
Sending SCPI/GPIB commands over USB from C#
问题 I'm trying to communicate with some test equipment from C# over SCPI. I managed to communicate with one device that is connected through TCP/IP by using this code example. However, my other devices are connected through USB and I haven't find how to communicate with them over USB. BTW, I found this question, and the link from the answer to the IVI-COM programming examples in C# document, but I couldn't apply the code samples (e.g. in section 5.4) because all of the IVI and VISA COM libraries
ImportError: No module named
问题 I'm migrating PyVisa from Python 2.6 to Python 3.2. I'm able to install the module. It's listed in C:\Python32\Lib\site-packages\pyvisa The __init__.py file imports a module ( vpp43.py ) from this folder. At this line I get following error: Traceback (most recent call last): File "D:\Documents and Settings\grknbl16\My Documents\PatternControl.py", line 2, in <module> from taborAwg import configTabor File "D:\Documents and Settings\grknbl16\My Documents\taborAwg.py", line 1, in <module> from
PyVISA missing methods
问题 I am running Win 7 x64, NI 488.2, PyVISA 1.5, and python with numpy/scipy/ipython. I am attempting to contact a Keithley instrument through a GPIB-USB connection and send simple commands. However, when I attempt to create the instrument object, I discovered that PyVISA's ResourceManager was missing the required methods used for finding, reading, and writing to instruments. Following the example code on PyVISA's page, right now I have: import visa rm = visa.ResourceManager my_instrument = rm
Python instrument drivers
问题 I am an experimental physicist and am a big enthusiast of Python. I find it great for data analysis and scripting, and I actualy also use it to interface laboratory instruments (network analyzer, scopes, signal analyzers, and signal generators...). I think Python would be a very serious competitor for MATLAB in my field if there would exist a nice library incorporating instrument drivers. Up to now, I have been using several strategies to interface them directly from my IPython session: Using
PyVISA SCPI commands and queries (issue with value update)
问题 UPDATE: It seems to be working "OK" this am... although I am not sure why certain replies have /r/n at the end and why certain don't. I have explicitly turned Handshaking OFF... An example of the commands, queries, and replies is posted below. **I am using PyVISA frontend to communicate with a sensor. I am having to have to send a command or make a query three times before there is a change in the output... Do I have to add wait command before proceeding? I thought the SCPI commands were
Developing Mobile P2P Payment Apps
问题 Main Question: If I were to start developing a mobile peer-to-peer payment app (Namely on iOS and Android), where would I start? i.e. What APIs would I use to create transactions that can occur between to peers, using debit and/or credit cards? What are the recommended languages for a backend? My take: From the research I have done, it would seem that companies like Square Cash etc. made use of the MasterCard and VISA APIs. This is possible something I would have to use. I would also make use