一种有效减少ADI-FDTD数值色散的方法

ADI—FDTD算法的数值色散效应较为明显，本文的研究表明一种通过添加各向异性媒质来修正相速误差，从而减少FDTD数值色散的方法，同样适用于ADI-FDTD，且收效更为显著。数值运算结果证明该方法能够简单有效地去除较宽频带范围内的色散。     

产业界对Java语言的评价

在过去的一年中，Ｊａｖａ语言欣起了计算机界的狂潮，世界和大计算机公司纷纷表明了Ｊａｖａ语言的支持态度。文章针对Ｊａｖａ语言和Ｊａｖａ操作系统介绍了业内人士的评价，并简单介绍了新成立的Ｊａｖａ联盟的有关情况。     

Study on Luminescence Properties of High-Density Phosphors BiTaO4∶Pr3+ and BiTaO4

The photoluminescence properties of BiTaO4∶Pr3+ and BiTaO4 at room temperature were studied, and the infrared transmission and diffusion reflection spectra of BiTaO4 were measured. The photoluminescence spectrum of BiTaO4 peaks at about 420, 440 and 465 nm. There has an obvious excitation band from 330 to 370 nm. The photoluminescence spectrum of BiTaO4∶Pr3+ consists of the characteristic emission of Pr3+, and its main peak is at 606 nm from 3P0→3H6 transition of Pr3+. Its excitation spectrum consists of the wide band with maximum at 325 nm, the wide band in the range of 375～430 nm, and the characteristic excitation of Pr3+. The bands at 325 nm and 375～430 nm may be from the absorption of the charge transfer transition of the tantalate group and defect energy levels in its forbidden band, respectively. There is energy transfer from host to Pr3+. Because both the host density and photoluminescence peak intensity of BiTaO4∶Pr3+ are superior to PbWO4, BiTaO4∶Pr3+ may be a potential heavy scintillator.     

对航天企业做强做大的思考

党的十六大提出了今后20年全面建设小康社会,国内生产总值翻两番的奋斗目标,国家的发展主要寄托于作为国民经济支柱的国有企业的发展。航天工业是一个国家综合国力的体现,航天企业整体规模和效益如何,是国家经济和国防实力的重要表现之一。要研究航天企业如何做强做大,就必须把它放到世界经济环境下去考量,并从如何改进、提升企业经营管理中寻找出答案。对标全球500强企业近年来,美国财经杂志《财富》发布的“全球500强企业”年度评选,已逐渐成为我国企业界关注的热点。这项评选活动成为世界经济及企业发展的重要参照和衡量标准,同时也为入…     

中兴宽带线路测试技术及功能介绍

宽带线路测试是中兴通讯ZXDSL综合宽带运维系统的核心功能，在DSL业务提供过程中主要应用在开通前的预测试、线路测试、开通后的例测试以及故障时的在线测试。对其测试技术和功能作了介绍。     

Study on Luminescence Properties of High-Density Phosphors BiTaO4：Pr^3＋ and BiTaO4

The photoluminescence properties of BiTaO4:Pr^3 and BiTaO4 at room temperature were studied, and the infrared transmission and diffusion reflection spectra of BiTaO4 were measured. The photoluminescence spectrum of BiTaO4 peaks at about 420, 440 and 465nm. There has an obvious excitation band from 330 to 370nm. The photoluminescence spectrum of BiTaO4:Pr^3 consists of the characteristic emission of Pr^3 , and its main peak is at 606 nm from ^3P0→^3H6 transition of Pr^3 . Its excitation spectrum consists of the wide band with maximum at 325nm, the wide band in the range of 375-430nm, and the characteristic excitation of Pr^3 .The bands at 325nm and 375-430nm may be from the absorption of the charge transfer transition of the tantalate group and defect energy levels in its forbidden band, respectively.There is energy transfer from host to Pr^3 . Because both the host density and photoluminescence peak intensity of BiTaO4:Pr^3 are superior to PbWO4, BiTaO4:Pr^3 may be a potential heavy scintillator.     

论社区服务产业化

社区经济作为一种优化的资源配置方式，利用社区服务为载体，将社区内互不相联的各种经济成份变为利益共同体，建立一种新的经济生产方式，从而带动社区乃至更广区域的经济发展。     

慢性咽喉炎食疗方6则

慢性咽喉炎是临床常见的一种咽喉疾病，主要表现为咽喉部干燥、发痒、灼热、微痛，严重春可导致咽喉部充血、肿大、声音嘶哑或咯痰不止，给患者的工作和生活带来不利影响。对于该病，根据具体情况对症采用饮食疗法往往会收到不错的效果。