No abstract

No abstract

No abstract

Needle coke is a type of high-quality coke with needle-like texture and layer structure. [1] Also, it presents a turbine carbon structure under the scanning electron microscope. [2,3] Needle coke was acknowledged as an exceptional raw material to obtain carbon materials, because it has low coefficient of thermal expansion (CTE), high mechanical strength, easy to graphitization, and other advantages. Therefore, it is widespread used in lithium battery anode materials, high-power, ultrahigh-power graphite electrodes, and so on. [4,5] At present, residual heavy oil, catalytic cracking slurry, and high-temperature coal tar pitch are commonly used to prepare needle coke. [6][7][8] The heavy pitch component of medium-and lowtemperature coal tar has the advantages of high aromaticity, low quinoline insoluble (QI) content, and narrower molecular weight distribution. [9] So, it is an excellent raw material for the preparation of needle coke. However, the higher heteroatom content and saturation in the raw materials lead to higher thermal reaction rate in a carbonization process, which is unfavorable to prepare needle coke and the mesophase with a wide-area streamline structure. [10,11] Because the mesophase with an orderly wide-area streamlined structure is precursor for the production of high-performance green needle coke during the coke is pulled by the airflow. [12] The appropriate pretreatment methods are used to reduce the thermal reactivity of raw materials, which is essential for preparing mesophase pitch. Garcia et al. [11] reported that the

The orbital angular momentum (OAM) holography has been identified as a vital approach for achieving ultrahigh-capacity multiplexation without a theoretical helical phase index limit. However, the encoding and decoding of an OAM hologram require a complete helical phase mode, which does not take full utilization of the angular space. In this paper, the partial OAM holography is proposed by dividing an OAM mode into several partial orbital angular momentums and encode each partial mode with a different target image. An image can only be reconstructed using an appropriate partial OAM mode within a specific illuminating angular range, henceforth holographic multiplexation of images can be realized. This method can significantly increase the holographic information capacity and find widespread applications.

Ti t l e Ex p e ri m e n t al inv e s ti g a tio n o n liq u ef a c tio n a n d p o s tliq u ef a c tio n d efo r m a tio n of s t r a tifi e d s a t u r a t e d s a n d u n d e r cyclic lo a di n g

The orbital angular momentum (OAM) holography has been developed and experimentally demonstrated capable of holographic multiplexation and high-security encryption. However, the helical phase of an OAM mode can only be encoded into one hologram associated with a target image, and this severely limits the information capacity in practical applications. The modulated orbital angular momentum (MOAM) holography is proposed by imposing multiple modulation phase modes onto one OAM mode. Three essential properties, including the MOAMpreservation, MOAM-selectivity and MOAM-multiplexation are investigated. This method can significantly enhance the holographic information capacity and it has broad prospects for optical encryption and beam manipulations.

No abstract