水性上光油技术及市场分析

20世纪90年代,随着我国印刷业逐渐引进大量的凹版及柔版印刷机,水性上光油也随之进入中国市场,并为广大印刷工作者所接受.但由于水性上光油成本较高,在我国的普及率还很低,主要局限于烟草、医药包装等高档印刷领域,而大多数印刷品的上光,仍以溶剂型产品为主.     

基于PTN系统的综合业务承载网建设方案

本文介绍了基于PTN系统构建的贯通全省的传输系统平台。该系统平台利用PTN系统柔性带宽且组网灵活的特点,可有效地承载专网类业务及二、三层电路应用类小颗粒业务,并可充分提升带宽的利用率,降低带宽成本,同时,也为今后河北广电网络开展其他各类专网业务提供了更多的解决思路。     

钛合金的应用和低成本制造技术

钛及钛合金具有优异的综合性能，是一种重要的金属结构材料，在军工、民用各个领域得到广泛的应用。简要阐述了钛合金的应用现状，分析了降低钛合金成本的可能性途径。     

A novel white-bluish emitting phosphor of (Ba0.49Sr0.49)2-B2P2O10:0.02Eu2+ for white LEDs

A novel white-bluish emitting phosphor of (Ba0.49Sr0.49)2B2P2O10:0.02Eu2+ is synthesized by the solid state reaction. (Ba0.49Sr0.49)2B2P2O10:0.02Eu2+ can be effectively excited by 370 nm ultraviolet (UV) light, and exhibits two emission bands at 430 nm and 522 nm which are attributed to the d-f transitions of the Eu2+ ions in two different cation sites in the host lattices. And the chromaticity coordinate of (Ba0.49Sr0.49)2B2P2O10:0.02Eu2+ phosphor is (0.29, 0.25).     

Photoluminescence properties of solid-state Tb3+ doped NaY(MoO4)2

A cost-effective ultra-dense wavelength-division-multiplexed passive optical network（UD-WDM PON） with speed of 12.5 Gbit/s and channel spacing of 12.5 GHz is proposed and demonstrated. The distributed feedback（DFB） lasers modulated in 4-level pulse amplitude modulation（4-PAM） format are used for downstream links, and the reflective semiconductor optical amplifiers（RSOAs） together with an optical frequency comb modulated in quadrature phase shift keying（QPSK） format are used for upstream links. We can achieve the error-free transmission of the upstream signals with speed of 12.5 Gbit/s even after 20 km single-mode fiber（SMF）. The power penalty obtained by using the frequency comb generator instead of a tunable laser is around 0.5 d B. By using 11 DFB lasers and a set of intensity and phase modulators, it is possible to provide the seed light for 297 optical network units（ONUs） within the C-band.