Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Modified nonlinear conjugate gradient method with sufficient descent condition for unconstrained optimization
Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article High-Resolution Source Localization Algorithm Based on the Conjugate Gradient
What-if models of pavement management analysis such as RTIM, HERS and HDM-4 predict the consequences of different maintenance options to be tested that are specified exogenously. Therefore, although they are often used to “optimize” maintenance options, they are not optimizing them in its true sense; they are merely used to find the best options among those tested. Since there are usually infinite numbers of options, it is impossible to exhaust all of them and only suboptimal optimizers are found.
At a meeting in Moscow in June 2005, Gil Strang suggested that there be a
collection of Gene Golub's work to highlight his many important contributions
to numerical analysis. The three of us were honored to undertake this pleasant
task, with publication timed for February "29", 2007, the 75th anniversary of
Gene chose 21 papers to include here, and we are grateful to the publishers
for permission to reprint these works. We asked each of the coauthors to write
about how the paper came to be written.
A prototypical problem road agencies are faced with is to find the optimal application schedule of maintenance works for a given road section. To solve such problems what-if models such as the road transport investment model (RTIM), the highway economic requirements system (HERS), and the highway development and management tool (HDM-4) are widely used to predict the consequences of different maintenance options.