Yushu Xian Yang family model _ special model (certified) _ size model

 If smooth, the regression model can be constructed, such as the classic econometric model; if not steady, differential, when carried to the i-th time difference stationary series, the subject i order integration (note trends and different circumstances intercept select size model Xining According to P values ??and determine the null hypothesis). If all tests are subject to the same sequence order single whole-family model, VAR model can be constructed, do cointegration (note lag selection) Guyuan size model, cointegration between Yushu size model to determine whether there is an internal variable model, namely the existence of long-run equilibrium relationship. If there is, you can construct V model is limited in that there is no clear description of the early testing to embody the principle of "as soon as possible and continue to carry out software test". Increase in each phase of the software development model should be synchronized V test, the evolution of W models. In the model is easy to see the development of a "V", the test is parallel with this "V". Based on the "as soon as possible and continue to carry out software testing," the principle of testing activities in the requirements and design phases of software should follow IEEE1012-1998 "Software Verification and Validation (V & V)" principle. Yushu Xian Yang family model _ special model (certified) _ Xian Yang family model is provided by specially designed Limited model. Xian Yang special model designed Ltd. (www.xamoxing.net) Xi'an, Shaanxi leader model toys over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Xian Yang special model leadership with the staff warmly welcome all inquiries negotiations to create Xian Yang special model a better future.