Since leaky-wave antennas(LWAs)have the advantages of high directivity,low loss and structural simplicity,LWAs are very suitable for designing millimeter-wave(mmW)antennas.The purpose of this paper is to review the la...Since leaky-wave antennas(LWAs)have the advantages of high directivity,low loss and structural simplicity,LWAs are very suitable for designing millimeter-wave(mmW)antennas.The purpose of this paper is to review the latest research progress of LWAs for 5G/B5G mobile communication systems.Firstly,the conventional classification and design methods of LWAs are introduced and the effects of the phase constant and attenuation constant on the radiation characteristics are discussed.Then two types of new LWAs for 5G/B5G mobile communication systems including broadband fixed-beam LWAs and frequencyfixed beam-scanning LWAs are summarized.Finally,the challenges and future research directions of LWAs for 5G/B5G mobile communication systems are presented.展开更多
临床相关剂量的抗癌药物均可以导致恶性肿瘤及细胞系发生细胞衰老和凋亡。衰老逃逸是细胞存活和耐药的重要机制,通过逃避凋亡和死亡,细胞重新进入到细胞周期的S期。近年来的研究表明多倍体肿瘤巨细胞(polyploid giant cancer cells,PGCC...临床相关剂量的抗癌药物均可以导致恶性肿瘤及细胞系发生细胞衰老和凋亡。衰老逃逸是细胞存活和耐药的重要机制,通过逃避凋亡和死亡,细胞重新进入到细胞周期的S期。近年来的研究表明多倍体肿瘤巨细胞(polyploid giant cancer cells,PGCC)有助于肿瘤的发生、侵袭、转移和治疗抵抗,这些PGCC的形成是肿瘤细胞发生衰老逃逸的前提,通过去多倍体化的方式,它们能够产生具有增殖活性的子代细胞,进而逃脱细胞衰老。本文就PGCC与细胞衰老和治疗抵抗之间的相关研究进展以及靶向PGCC的治疗策略进行概述,为探索致命性癌症的治疗干预提供一个全新的模式。展开更多
基金the National Natural Science Foundation of China(NSFC)under Grants 62071306 and 61801299in part by the Mobil⁃ity Program for Taiwan Young Scientists under Grant RW2019TW001and in part by Shenzhen Science and Technology Program under Grants GJHZ20180418190529516 and JSGG20180507183215520.
文摘Since leaky-wave antennas(LWAs)have the advantages of high directivity,low loss and structural simplicity,LWAs are very suitable for designing millimeter-wave(mmW)antennas.The purpose of this paper is to review the latest research progress of LWAs for 5G/B5G mobile communication systems.Firstly,the conventional classification and design methods of LWAs are introduced and the effects of the phase constant and attenuation constant on the radiation characteristics are discussed.Then two types of new LWAs for 5G/B5G mobile communication systems including broadband fixed-beam LWAs and frequencyfixed beam-scanning LWAs are summarized.Finally,the challenges and future research directions of LWAs for 5G/B5G mobile communication systems are presented.
文摘临床相关剂量的抗癌药物均可以导致恶性肿瘤及细胞系发生细胞衰老和凋亡。衰老逃逸是细胞存活和耐药的重要机制,通过逃避凋亡和死亡,细胞重新进入到细胞周期的S期。近年来的研究表明多倍体肿瘤巨细胞(polyploid giant cancer cells,PGCC)有助于肿瘤的发生、侵袭、转移和治疗抵抗,这些PGCC的形成是肿瘤细胞发生衰老逃逸的前提,通过去多倍体化的方式,它们能够产生具有增殖活性的子代细胞,进而逃脱细胞衰老。本文就PGCC与细胞衰老和治疗抵抗之间的相关研究进展以及靶向PGCC的治疗策略进行概述,为探索致命性癌症的治疗干预提供一个全新的模式。
