TENCEL纤维及织物性能

TENCEL纤维是Courtaulds公司以木浆纤维素为原料,以无公害工艺制取的人造纤维素纤维。TENCEL纤维具有优异的强伸性、混纺性和独特的原纤化,成为不断被开拓应用领域、实用价值极高的新一代纤维。TENCEL纤维的织物细致高贵、柔软顺滑的触感,将引导着21世纪衣着时尚的潮流。     

北缘蔗区甘蔗专用留种田栽培技术研究(续完)──Ⅲ.蔗种茎粗对大田生产的影响的研究

本研究以湘北蔗区常规甘蔗品种NCo310为材料,在1998年进行甘蔗蔗种茎粗对大田生产的影响试验,观察了甘蔗的出苗率、有效茎数、株高、茎粗、单茎重、产量等农艺性状,结果表明蔗种茎粗对大田生产有显著影响,当蔗种茎粗小于1．7cm时,甘蔗大田生产产量显著减少,本研究表明甘蔗中小茎品种如NCo310等只有当播种行距在0．5。～0．6m时,才能获得较多茎粗大于1．7cm的甘蔗种芽．通过1996～1998年三年研究表明,在北缘蔗区建立甘蔗专用留种田栽培制度是切实可行的,但要适当的控制行距和密度．采用甘蔗专用留种田栽培技术,可以明显地提高北缘蔗区的甘蔗生产水平。     

当前变性淀粉浆料使用中几个问题的探讨

针对当前国内在使用变性淀粉浆料中出现的一些问题以及某些与生产实际相背的误导,从淀粉学期本鲺变性的基本原理出发作了分析。指出了当前常用的变性淀粉浆料各自的适应性与使用时的注意点,特别是ＣＭＳ中的ＮａＣｌ、磷酸酯淀粉的适应性、以及干法征税与湿法生产商品听优缺点比较等,希望能为纺织品厂用好各种变性淀粉浆料提供一些依据。     

高粘切片在锦纶异形丝高速纺中的应用

介绍了用高粘度切片生产锦纶6有光异形全牵伸丝系列新产品的特点及开发过程,并论述了与此相关的设备改造和关键技术。     

小麦麸皮酶法制备低聚糖的研究

以小麦麸皮为原料采用生物技术制备新型低聚糖,低聚糖含量可达８０％,对双歧杆菌增殖效果明显,具有多功能特性,生产成本低,工业化经济效益十分明显。     

基于智慧因子的分布式可穿戴音频人体网络随机微分博弈功率控制模型

In this study, aiming at the characteristics of randomness and dynamics in Wearable Audio-o-riented BodyNets(WA-BodyNets), stochastic differ-ential game theory is applied to the investigation of the problem of transmitted power control inconsum-er electronic devices. First, astochastic differential game model is proposed for non-cooperative decen-tralized uplink power control with a wisdom regula-tion factor over WA-BodyNets with a one-hop star topology.This model aims to minimize the cost as-sociated with the novel payoff function of a player, for which two cost functions are defined: functions of inherent power radiation and accumulated power radiation damage. Second, the feedback Nash equi-librium solution of the proposed model and the con-straint of the Quality of Service (QoS) requirement of the player based on the SIR threshold are derived by solving the Fleming-Bellman-Isaacs partial dif-ferential equations. Furthermore, the Markov prop-erty of the optimal feedback strategies in this model is verified.The simulation results show that the pro-posed game model is effective and feasible for con-trolling the transmitted power of WA-BodyNets.     

光纤无线电系统的线性动态范围研究

针对ROF(光纤无线电)通信系统中的线性动态范围的拓展问题,综述了国内外相关研究进展,梳理和阐述了影响系统动态范围的限制因素。着重介绍了基于双平行调制器结构和预失真思想的可抗色散的高线性调制技术。实验验证了原理与最佳实验条件的正确性;在25km单模光纤传输下,相比于典型ROF系统,采用新技术的系统无失真动态范围测量值提高了至少20dB。     

Low series resistance high-efficiency GaAs/AlGaAs vertical-cavity surface-emitting lasers with continuously graded mirrors grown by MOCVD

GaAs/AlGaAs vertical-cavity top-surface-emitting lasers (VCSELs) with a continuously graded mirror composition have been grown by MOCVD, and planar devices with proton-implant current confinement have been characterized. Continuous grading of the heterointerfaces in the Bragg reflectors eliminated the energy-band discontinuities, thus improving carrier transport and resulting in a substantial reduction in the series resistance and threshold voltage of the laser diodes. These VCSELs have excellent room-temperature CW electrical characteristics, including some of the lowest series resistances, highest power efficiencies and lowest operating voltages ever reported.<>     

对引进离子注入机损坏部件进行国产化替换的尝试

国内引进了不少离子注入机,维修问题日渐重要。对其损坏部件,用国产配件进行替换,不乏为又快又省的维修方法。本文叙述了八年多来,我们在维修IM—200M型离子注入机的实践中,对损坏的吸极电源、氟里昂热交换器和化学机械泵等重要部件,用自制的或改制的国内配件进行替换,从而保证了设备安全运行二万五千多小时,注入八万五千多块硅及GaAs靶片,完成了集成电路研制和开发任务。