word 全国六级万能作文 汽车对生活的影响 Along with the economic growth, private cars have penetrated into a wealth of citizens’ lives because of its convenience features. Undoubtedly, the widespread use of cars promotes the social productivity and enhances the eco
There is rapidly converging agreement that CO2 emissions need to be reduced in order to limit climate change and global warming effects. One way of disposing of carbon dioxide, which may be reasonable in the short term, is by subsurface mineralisati
Antibiotic fermentation processes are raw material cost intensive and the profitability is greatly dependent on the product yield per unit substrate consumed. In order to reduce costs, industrial processes use organic nitrogen substrates (ONS) such
Climate change has become the most globally concerned environmental issue. As the world’s largest carbon dioxide emitter and primary energy consumer, China has strong incentives to change its coal- dominated electricity structure. Various renewable
word 全国六级万能作文 汽车对生活的影响 Along with the economic growth, private cars have penetrated into a wealth of citizens’ lives because of its convenience features. Undoubtedly, the widespread use of cars promotes the social productivity and enhances the eco
这是复习及备战六级的秘籍,很赞的资源哦2008年6月大学英语六级A卷真题 Part I Writing (30 minutes) Will E-books Replace Traditional Books? 1.随着信息技术的发展，电子图书越来越多； 2.有人认为电子图书将会取代传统图书，理由是… 3.我的看法。 Part Ⅱ Reading Comprehension(Skimming and Scanning)(15 minutes) What Will the World Be Lik
A pioneer of artificial intelligence shows how the study of causality revolutionized science and the world 'Correlation does not imply causation.' This mantra was invoked by scientists for decades in order to avoid taking positions as to whether one
The formation process of silicon-nanocrystals (Si-NCs) in the amorphous silicon/silicon dioxide (a-Si/SiO2) multilayer structure during thermal annealing is theoretically studied with a modified model based on the Gibbs free energy variation. In this
Optical transmission at 532 nm from nonabsorbing disordered porous silicon dioxide has been studied experimentally. The transmission behaviors can be adjusted by filling the pores with liquids of different refractive indics, which are analyzed based
A novel nanopolycrystalline structure of vanadium dioxide thin films is deposited on silicon or fused silica substrates by reactive ion sputtering and followed by an annealing. The characteristic analysis shows that the films have a columnar nanostru
The photo-acoustic (PA) spectrum of nitrogen dioxide (NO2) in the range of 420-520 nm with a Nd:YAG pumped optical parametric generator and amplifier as radiation source is presented. The spectrum has a characteristic of banded structure superimposed
In this work a passively Q-switched dual-wavelength ytterbium-doped fiber laser using a titanium dioxide-based saturable absorber is proposed and proven. The system also utilizes a side-polished fiber in a ring cavity configuration to obtain the desi
A novel scheme for the design of an ultra-compact and high-performance optical switch is proposed and investigated numerically. Based on a standard silicon (Si) photonic stripe waveguide, a section of hyperbolic metamaterials (HMM) consisting of 20-p
Metamaterials have demonstrated exotic electromagnetic properties, which offer a good platform for realizing light absorption, photodetection, filtering, and so on. However, broadband multifunctional metamaterial absorbers are restricted in cascaded
