Struts framework based on MVC has brought the best code reuse and the legible code structure in entire system by far, but it has some problems such as complicated program, high coupling among layers and hard maintenance because its model part adopts JDBC to connect databases directly. The ORM characteristics of Hibernate make it simple and easy to implement… (More)
The performance of a satellite-to-ground optical communication system with phase modulation is limited by phase fluctuations induced by atmospheric turbulence. To improve the system performance, one effective way is to use coherent detection. In this paper, a satellite-to-ground coherent optical communication system with differential quadrature phase-shift… (More)
A scheme for the generation of high order ultra-wideband (UWB) pulses based on a single dual parallel March-Zehnder modulator (DPMZM) is proposed in this paper. By adjusting the working parameters of DPMZM, triplet pulses, quadruplet pulses and quintuplet pulse are achieved.
We demonstrate a new scheme of generating optical frequency combs (OFC) utilizing a single dual parallel Mach-Zehnder modulator. Gaussian-shaped OFC and flat OFC with a tunable spacing, flexible line-number and high side mode suppression ratio are generated.
To address the issue that the present nutrition/health care system can only provide qualitative services for pregnant women, a quantitative nutritional algorithm is proposed based on nutritional diagram & fuzzy theory, and a software system for providing quantitative nutritional guidance is developed based on a C/S & B/S hybrid architecture; the… (More)