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Articles by Qin Zheng
Total Records ( 3 ) for Qin Zheng
  Wang Weihong , Cao Yuhui and Qin Zheng
  Aiming at the contradiction question between terminal resources limited and terminal computation in mobile collaboration, a case-based reasoning computation migration mechanism (CBRCMM) was proposed. At first, the key factors influencing computation migration were abstracted from mobile collaboration environment and they were taken as main characters of the computation migration case. Secondly, adopt the value interval and grading methods to depict the main characters, Thus, which were then used to enhance ability of computation migration case. Thirdly, apply appointment priority and easy adaptation priority principle and select the appropriate case relative to the current situation by the matching degrees of migration case. At last, modify the case based on the specific application practice in current situation; make it as a new case and save it in succeed record or fail record. At present, the mechanism has been applied to the Mobile Collaboration Platform of Supporting Mobile Collaboration Services. The practice indicates mechanism that this simple and effective can alleviate the contradictory question between terminal resources limited and terminal computation in mobile collaboration in a certain extent and support powerful mobile collaboration.
  Wang Xin , Han Feng-Yan and Qin Zheng
  To solve the problem about software reliability testing cases and testing data generation of real-time control systems, this study applies the reliability testing cases generation approach based on the mixture of operation profile and Markov chain which describes software operation profile by the use cases of UML, establishes the use model based on UML model for automatically deriving the testing model from the use model, generates a reliability testing case set based on the testing model and generates testing input data of reliability testing semi-automatically by eliciting input and output variables and abstracting testing input and output classes. The results of reliability testing on the actual airborne software show that the framework of the test case set generated by the proposed model is fairly stable. Thus, the proposed approach is suitable for generating reliability testing data of the real-time control system software semi-automatically, greatly simplifies the reliability testing process, improves testing efficiency and ensures testing validity.
  Qin Zheng , Yongheng Shang , Zhiyu Wang , Jiarui Liu , Min Zhou , Xiuqin Xu , Liping Wang , Hua Chen , Zhengliang Huang , Zheming Lu and Faxin Yu
  In this study, an automated testing system for a reflection-type Vector Modulators (VM) comprised of a Field Programmable Gate Array (FPGA) and a LabVIEW based testing software is presented. The testing system with a friendly Graphic User Interface (GUI) is able to evaluate all the functionality of the VMs and allows the user to test the FPGA module step-by-step or to automate the testing in a sequential way. In case of multiple VM testing, all the VMs can be tested in one time by automatically sending the control commands to manipulate the bias voltage of each VM. Only one FPGA based hardware is needed in the testing system for the bias voltage control. This present testing system is highly efficient for VM testing and can be easily generalized to the testing of other VMs.
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