GaAs VCSEL／MISS混合集成光子开关

报道了ＭＢＥ生长的ＧａＡｓ材料ＶＣＳＥＬ与ＭＩＳＳ混合集成构成的光子开关。将ＭＢＥ生长的超薄ＡｌＡｓ层氧化为ＡｘＯｙ层用作ＭＩＳＳ器件的超薄半绝缘层，从而解决了该半绝缘层厚度的精密控制以及与ＶＣＳＥ工艺相容的问题。该集成器件除光子开关功能外，还能实现光放大功能，并可用于自由空间光互连。     

商品条码在包装中的定位与印刷

商品条码在包装中的定位与印刷陈克愚ＰＯＳＩＴＩＯＮＩＮＧＡＮＤＰＲＩＮＴＩＮＧＯＦＢＡＲＣＯＤＥＳＯＮＣＯＭＭＯＤＩＴＩＥＳ￥ＣｈｅｎＫｅｙｕＡｂｓｔｒａｃｔ：Ｂａｒｃｏｄｅｉｓｂｒｉｎｇｉｎｇａｂｏｕｔａｒｅｖｏｌｕｔｉｏｎｔｏｔｈｅｃｉｒｃｕｌａ...     

RADISS——面向CIMS／MIS的快速开发平台

介绍了一个ＣＩＭＳ环境下的管理信息系统的快速开发平台。该平台采用ＣＬＩＥＮＴ／ＳＥＲＶＥＲ体系结构，在ＵＮＩＸ及ＷＩＮＤＯＷＳ操作系统和支持ＴＣＰ／ＩＰ网络协议的环境下，提供了一组快速开发ＣＩＭＳ／ＭＩＳ的主包括ＭＲＰ、ＢＯＭ处理在内的集成支持环境，可以极大地提高应用系统的开发效率，缩短应用系统的开发周期，并使应用系统具有较好的集成性和开放性。     

Introduction of IJPEM

ＩｎｔｒｏｄｕｃｔｉｏｎｏｆＩＪＰＥＭＡＩＭＳＡＮＤＳＣＯＰＥｈｅＩｎｔｅｒｎａｔｉｏｎａｌＪｏｕｒｎａｌｏｆＰｌａｎｔＥｎｇｉｎｅｒｉｎｇａｎｄＭａｎａｇｅｍｅｎｔ（ＩＪＰＥＭ）ｉｓａｎｅｗｊｏｕｒｎａｌｐｕｂｌｉｓｈｅｄｂｙｔｈｅＮｏｒｔｈｗｅｓ...     

CONTENTS OF NEW CARBON MATERIALS OF Vol.16

Ｎｏ .1ＲｅｓｅａｒｃｈａｒｔｉｃｌｅｓＳＴＵＤＹＯＮＴＨＥＭＩＣＲＯＷＡＶＥＡＢＳＯＲＢＩＮＧＰＲＯＰＥＲＴＹＯＦＣＯＭＰＯＳＩＴＥＭＡＴＥＲＩＡＬＣＯＮＴＡＩＮＩＮＧＣＡＲＢＯＮＮＡＮＯＴＵＢＥＳ　ＷＩＴＨＮＩＣＯＡＴＩＮＧＳＨＥＮＺｅｎｇ ｍｉｎ　ＺＨＡＯＤｏｎｇ ｌｉｎ(1) :1………………………………………………………………………ＡＮＥＦＦＥＣＴＩＶＥＭＥＴＨＯＤＦＯＲＰＩＴＣＨＣＯＭＰＯＳＩＴＩＯＮＤＥＳＩＧＮＺＨＩＬｉｎ ｊｉｅ　ＳＯＮＧＪｉｎ ｒｅｎ　ＬＩＵＬａｎｇ(1) :5………………………     

Introduction of IJPEM

ＩｎｔｒｏｄｕｃｔｉｏｎｏｆＩＪＰＥＭＡＩＭＳＡＮＤＳＣＯＰＥＴｈｅＩｎｔｅｒｎａｔｉｏｎａｌＪｏｕｒｎａｌｏｆＰｌａｎｔＥｎｇｉｎｅｒｉｎｇａｎｄＭａｎａｇｅｍｅｎｔ（ＩＪＰＥＭ）ｉｓａｎｅｗｊｏｕｒｎａｌｐｕｂｌｉｓｈｅｄｂｙｔｈｅＮｏｒｔｈｗ...     

Introduction of IJPEM

ＩｎｔｒｏｄｕｃｔｉｏｎｏｆＩＪＰＥＭＡＩＭＳＡＮＤＳＣＯＰＥｈｅＩｎｔｅｒｎａｔｉｏｎａｌＪｏｕｒｎａｌｏｆＰｌａｎｔＥｎｇｉｎｅｅｒｉｎｇａｎｄＭａｎａｇｅｍｅｎｔ（ＩＪＰＥＭ）ｉｓａｎｅｗｊｏｕｒｎａｌｐｕｂｌｉｓｈｅｄｂｙｔｈｅＮｏｒｔｈｗｅ...     

Introduction of IJPEM

ＩｎｔｒｏｄｕｃｔｉｏｎｏｆＩＪＰＥＭＡＩＭＳＡＮＤＳＣＯＰＥＴｈｅＩｎｔｅｒｎａｔｉｏｎａｌＪｏｕｒｎａｌｏｆＰｌａｎｔＥｎｇｉｎｅｒｉｎｇａｎｄＭａｎａｇｅｍｅｎｔ（ＩＪＰＥＭ）ｉｓａｎｅｗｊｏｕｒｎａｌｐｕｂｌｉｓｈｅｄｂｙｔｈｅＮｏｒｔｈｗｅ...     

抑制等信道间距陆上干线光纤通信系统中光纤色散和四波混频效应的新方案

提出了一种用以克服等信道间距划分、波分复用（ＷＤＭ）＋掺饵光纤放大器（ＥＤＦＡ）陆上光纤通信系统中光纤色散和四波混频（ＦＷＭ）效应的新方案。采用１５５０ｎｍ处色散为－２．８９ｐｓ／ｋｍ／ｎｍ的小色散单模光纤（ｓｍａｌｌ－ｄｉｓｐｅｒｓｉｏｎｓｉｎｇｌｅ－ｍｏｄｅ－ｆｉｂｅｒ，ＳＤＳＭＦ）可避免严重的ＦＷＭ效应，同时利用ＩＴＵ－ＴＧ．６５２非色散位移光纤（ｎｏｎ－ｄｉｓｐｅｒｓｉｏｎ－ｓｈｉｆｔｅｄｆｉｂｅｒ，ＮＤＳＦ），在ＥＤＦＡ整个带宽范围内（１５３０～１５７０ｎｍ）补偿ＳＤＳＭＦ引入的负色散。采用此方案，一个１０路×１０Ｇｂ／ｓ、１０级ＥＤＦＡ级联的等信道间距（１ｎｍ）光纤通信系统，经近千公里的光纤传输后，ＦＷＭ和色散引入的恶化量将分别小于１ｄＢ。     

Introduction of IJPEM

ＡＩＭＳＡＮＤＳＣＯＰＥＴｈｅＩｎｔｅｒｎａｔｉｏｎａｌＪｏｕｒｎａｌｏｆＰｌａｎｔＥｎｇｉｎｅｒｉｎｇａｎｄＭａｎａｇｅｍｅｎｔ（ＩＪＰＥＭ）ｉｓａｎｅｗｊｏｕｒｎａｌｐｕｂｌｉｓｈｅｄｂｙｔｈｅＮｏｒｔｈｗｅｓｔｅｒｎＰｏｌｙｔｅｃｈｎｉｃａｌＵ...     

HF酸电解液浓度对TiO2纳米阵列结构的影响

TiO2纳米阵列(纳米管、纳米棒)结构具有良好的力学性能、化学稳定性以及抗腐蚀性能,在许多技术领域具有广阔的应用前景。采用阳极氧化法在工业纯钛片表面制备出高度有序的TiO2纳米管阵列和纳米棒阵列,研究了电解液浓度和阳极氧化时间对TiO2纳米阵列结构的影响,并对其形成机理进行了初步探讨。结果表明,低浓度的HF酸电解液有利于制备纳米管阵列,高浓度的HF酸电解液有利于制备纳米棒阵列。     

Directional laser generation and detection of ultrasound with arrays of optical fibers

Some aspects of the generation and detection of ultrasound with laser beams are presented. The objective of the study is (1) to present some experimental results on the generation of ultrasound with an array of optical fibers, (2) to discuss the possibility of generating directional surface waves with acousto-optic scanning in a very narrow frequency band, thus increasing the signal-to-noise ratio, and (3) to discuss the feasibility of the directional detection of ultrasound by using an array of optical fibers as a receiver, also with the goal of increasing the signal-to-noise ratio.     

A simple scheme for self-focusing of an array

A self-focusing technique and its application to a linear array system are presented in this paper. By application of the technique the system is capable of both sonification and reception focusing. The array is first excited as an unfocused array. Next a cross-correlation technique is used to determine time delays of reception of the largest amplitude backscattered signals at the elements of the array. The original transducer signal is then reemitted with the appropriate time delays to achieve sonification focusing on the scatterer producing the largest signal. This process is repeated in an iterative mode to focus energy on the strongest scatterer. Once insonification focusing has been achieved the last time-delay calculations are used once more for reception focusing, i.e., to correct the signals received by the individual elements for differences in arrival times. A low cost linear array has been constructed to implement the self-focusing technique. Examples demonstrate the capability of the technique to focus on the largest hole of sets of three holes in an aluminum specimen.