Bøker av Xu Han

Say cheese! Join Mr. Octopus and friends as they take pictures with their new camera. Colorful illustrations and cute characters encourage young readers to pay attention to detail be themselves! Reading tips and help enrich the learning experience while entertaining stories and fun activities keep young readers engaged.

Where did Mr. Octopus go? Join the animal friends as they try to find Mr. Octopus during a game of hide and seek. Colorful illustrations and cute characters invite young readers to recognize details and identify hidden images! Reading tips and help enrich the learning experience while entertaining stories and fun activities keep young reader...

Mr. Octopus wants to make music! Join the animal friends as they make sounds using everyday objects. Colorful illustrations and cute characters introduce young readers to patterns onomatopoeia and making music! Reading tips and help enrich the learning experience while entertaining stories and fun activities keep young readers engaged.&nbs...

Everyone is good at something! Join Mr. Octopus and friends as they showcase their unique talents. Colorful illustrations and cute characters introduce young readers to celebrating ourselves and having fun! Reading tips and help enrich the learning experience while entertaining stories and fun activities keep young readers engaged.

Mr. Octopus feels like dancing! Join in on the fun as he and his friends share their favorite dance moves. Colorful illustrations and cute characters introduce young readers to fun dances and the importance of moving their bodies while encouraging self-confidence! Reading tips and help enrich the learning experience while entertaining storie...

It's fun to be creative! Join Mr. Octopus and friends as they use their special skills to create works of art. Colorful illustrations and cute characters introduce young readers to different art styles and the importance of creativity! Reading tips and help enrich the learning experience while entertaining stories and fun activities keep you..

Today is Mr. Octopus's birthday! Join the animal friends as they put on the perfect party for his big day. Colorful illustrations and cute characters introduce young readers to counting telling time and celebrating! Reading tips and help enrich the learning experience while entertaining stories and fun activities keep young readers engaged..

It's raining today! Join Mr. Octopus as he gives out umbrellas to his animal friends. Colorful illustrations and cute characters introduce young readers to colors matching and staying dry! Reading tips and help enrich the learning experience while entertaining stories and fun activities keep young readers engaged.

Firstly, adopting a mathematical programming theory perspective, it develops an innovative mathematical transformation model to deal with general nonlinear interval uncertain optimization problems, which is able to equivalently convert complex interval uncertain optimization problems to simple deterministic optimization problems.

This book focuses on numerical simulation-based design theory and methods inmechanical engineering. The simulation-based design of mechanical equipmentinvolves considerable scientific challenges including extremely complex systems,extreme working conditions, multi-source uncertainties, multi-physics coupling, andlarge-scale computation. In order to overcome these technical difficulties, this booksystematically elaborates upon the advanced design methods, covering high-fidelitysimulation modeling, rapid structural analysis, multi-objective design optimization,uncertainty analysis and optimization, which can effectively improve the designaccuracy, efficiency, multi-functionality and reliability of complicated mechanicalstructures.This book is primarily intended for researchers, engineers and postgraduate studentsin mechanical engineering, especially in mechanical design, numerical simulation andengineering optimization.