青岛电视台《金环入海》节目直播技术实现与体会

本文介绍了青岛电视台新闻综合频道2010年1月15日日环食直播的技术要点与体会，重点介绍这次直播采用3G联通手机网络传输信号所带来的亮点。     

EVDO网络中QoS应用的探讨

EVDO是针对移动多媒体应用而进行优化的无线技术。介绍了电信业3G技术的演进路线,并对EVDO Rev A的QOS需求进行了分析,然后进一步描述了QoS在EVDO Rev A网络中的应用模式。     

B3G TDD系统的基带链路架构与时序设计

本文通过参与“863”FuTURE项目中B3G TDD系统的设计与实现过程,探讨B3G系统中基带时序设计和系统中存在的问题,并给出解决方法。     

基于USB 2.0的同步数据采集系统的设计

针对当前工程中数据采集要更快更精确的要求,提出了一种新的数据信号采集系统。他采用的方法是利用USB 2.0接口芯片CY7C68013A和AD7658来实现同步多路数据采集以及与计算机间的通信。实验结果说明,该系统数据传输效率高、工作稳定,很好地满足设计要求。这种设计方法不但切实可行,且具有同步、高速、电路简单等特点,可以满足多种工程设计的要求,是一种很值得推广的数据采集方法。     

基于TMS320 C5416芯片的低时延 G.729A声码器的研制

简要介绍了G.729A声码器的编解码算法和定点数字信号处理芯片TMS320C5416,给出了基于TMS320C5416芯片实现低时延的G.729A声码器的硬件和软件设计,并对软件设计过程中应该注意的若干问题进行了分析和总结,最后给出了实时实现的测试结果.     

Enzymic degradation and nature of the endosperm cell walls of germinating sorghums and barley

β-(1·3)(1·4)-Glucans are the major components of isolated endosperm cell walls of both sorghum and barley grains and the concentration declines from 75% in unmalted barley walls to 32% in those of the 6-day malts. In sorghums over the same period, the reduction was from 72 and 68% to 54 and 62% in varieties L187 and SK5912, respectively. Following germination wall pentosans, while enhanced in barley, decreased in sorghum. The enzymes which were unable to hydrolyse the walls of sorghum to release sugars (unlike those of barley) did so after the walls had been solubilised in alkali. Cellobiose accounted for 43% of the hydrolysates of the alkali-solubilised walls when incubated with sorghum malt enzymes and 79% when barley enzymes were used. Laminaribiose was not detected in either case which indicates that the polysaccharide of the sorghum walls is largely of a ‘cellulosic’ nature. Preliminary evidence suggests that fuco-xyloglucan may contribute to the resistance of the sorghum endosperm cell walls to enzymic attack during germination.     

可修排队系统中可靠性指标的分解

本文提出了一种分析可修排队系统的新信息处理－分解法，应用该方法我们重新讨论了服务器可修的Ｍ／Ｇ／１排队系统，获得服务器在时刻ｔ失效的概率和在（０，ｔ］中失效的平均次数这两个主要可靠性指标的分解结果，而且进一步分析了服务器可修的ＧＩ／Ｇ１排队系统。值得注意的是本文提出的解解法新颖、简洁。     

SEROS – A SELF-ROUTING OPTICAL ATM SWITCH

A fault-tolerant high-performance SElf-Routing 2 × 2 Optical ATM Switch (SEROS) is proposed. The switch is designed using all-optical components which allows the exploitation of spatial parallelism. SEROS can be used with any multistage interconnection network such as Omega, Banyan, Shuffle or Benes. For the purpose of this study, SEROS has been incorporated into a generic self-routing multistage interconnection network that uses 2 × 2 switches and is not fault tolerant. Reliability analysis is carried out and the results are compared with two major fault-tolerant networks. They show that without redundant switches, better network survivability is achieved. All the switches in the network are 2 × 2, making it easier to mass produce.     

Sex pheromone of aPlanotortrix excessana sibling species and reinvestigation of related species

The sex pheromone of aPlanotortrix excessana sibling species was investigated. Females were found to produce eight potential pheromone components: dodecyl acetate, tetradecyl acetate (14OAc). (Z)-5-tetradecenyl acetate (Z5-14OAc), (Z)-7-tetradecenyl acetate (Z7-14OAc), (Z)-9-tetradecenyl acetate, hexadecyl acetate, (Z)-7-hexadecenyl acetate, and (Z)-9-hexadecenyl acetate. When these compounds were bioassayed using field-trapping and wind-tunnel techniques, only 14OAc,Z5-14OAc, andZ7-14OAc were found to be behaviorally active. The sex pheromone glands of females of other species including,Planotortrix MBS,Planotortrix M,P. notophaea, Ctenopseustis servana, and aC. obliquana sibling species, were also found to containZ5-14OAc orZ7-14OAc, singly or in combination. In the case ofPlanotortrix M, the addition ofZ7-14OAc to the previously identified sex pheromone blend ofZ5-14OAc and 14OAc was found to increase trap captures of male moths of this species. Thus in these New Zealand species (and in some Australian species),Z5-14OAc andZ7-14OAc appear to be utilized in combination in pheromonal communication just as (Z)-11-tetradecenyl acetate and (E)-11-tetradecenyl acetate are used by many species of Holarctic Tortricidae in the tribe Archipini.Lepidoptera: Tortricidae: Tortricinae.     

Effects of maturation and storage on solubility,emulsion stability and gelation properties of isolated soy proteins

Solubility, emulsion stability and gelation of isolated soy proteins and their 7S and 11S fractions from three stages of seed maturity were studied. The pH-solubility profile was similar irrespective of maturation and six-month storage. The 11S protein was more soluble in the acidic pH range than the 7S protein. Oil-in-water emulsion stability of isolated soy protein from mature soybeans was higher than that from the immature ones. This is due to the fact that there was more 7S fraction in the mature soybeans, and 7S protein was found to form a more stable emulsion than that formed from 11S protein. The result suggests that isolated soy protein from mature soybeans would serve as a better emulsifying agent. Heat-induced soy protein gels became weaker as the soybeans became more mature. This can be attributed to the higher content in the immature soybeans of 11S fraction which gives a stronger gel than 7S fraction in the protein from immature soybeans.