读图时代内容营销     

吕辰 《声屏世界》2016,(7):122-122

从石刻到绘画,到印刷到自拍,五千多年来图片一直是人类沟通交流的载体。最近出现“图片＋”的概念,它的兴起和互联网的大环境是密不可分的。  相似文献   

Chromatic Dispersion Monitoring Method Based on Phase Shift Technique     

吕辰刚  武星  曾丽珠  秦一帆  祖鹏  胡志雄  葛春风 《天津大学学报(英文版)》2007,13(1):67-69

The chromatic dispersion( CD) degrades themodulation-phase relationships of lightwave signals,reducing information-carrying capacity through pulse-broadening in digital networks and distortion in analogsystems[1,2]. The widespread use of dense wavelengthd…  相似文献   

社会创业合法性形成机制研究述评     

厉杰  吕辰  于晓宇 《研究与发展管理》2018,30(2):148-158

社会创业如何突破合法性门槛、获取社会支持,从而创造更高的社会价值？既有文献对这一问题的研究非常零散,尚未形成系统的理论体系.遵循“社会创业—社会创业合法性—形成机制”的逻辑,对既有文献梳理发现：与一般商业创业相比,社会创业合法性有其独特性,社会企业可通过“精心设计”的管理举措与组织实践谋求合法性.本文从社会创业合法性形成机制的前因变量、策略及情境条件3个方面,多角度归纳社会创业合法性的形成机制,构建了社会创业合法性研究框架,并提供未来探讨的主要方向.  相似文献   

Demodulation system for fiber Bragg grating sensors using digital filtering technique     

吕辰刚  胡志雄祖鹏  葛春风武星 《天津大学学报(英文版)》2008,14(1):27-30

A discrimination measurement method and demodulation technique for fiber Bragg grating （FBG） sensors were presented using digital filtering technique. The system can control a tunable fiber Fabry-Perot filter with sawtooth wave voltage generated by digital clock to interrogate FBG sensors. Using the analogue digital converter （ADC）, the reflected FBG signals were sampled with synchronous digital clock. With the aid of digital matched filtering technique, the sampled FBG signals were processed to obtain the maximum signal-to-noise ratio （SNR） and the Bragg wavelength shift from the FBG signals was recovered. The results demonstrate that this system has a scanning range of 1 520 nm-1 575 nm,and the wavelength detection accuracy is less than 2 pm with 1.5 Hz scanning frequency.  相似文献