Nucleate Pool Boiling of Pure Liquids and Binary Mixtures：PartI－Analytical Model for Boiling Heat Transfer of Pure Liquids on Smooth Tubes

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使用光纤放大器的频分复用光纤传输系统

报道了一个使用光纤放大器的两路非相干频分复用光纤传输实验系统。系统采用国产ＤＦＢ激光器作光源，用意大利生产的光纤放大器作在线放大器，用自制的光学谐振腔作光学滤波器和解复用器，采用ＦＳＫ调制制式，将１４０Ｍｂ／ｓ非归零伪随机码传输了５０公里，得到了很好的眼图。在频道间距为１０ＧＨｚ情况下，未观测到邻道干扰和光纤放大器的非线性现象。     

控制决策的信息传输

本文讨论了在一条通讯通道上执行基本控制决策的信息传输问题。结果表明当且仅当第一条通道可模拟另一条通道的操作时，则第一条通道在任何情况下比另一条通道都有优势。     

A broadly cross-protective monoclonal antibody binding to Escherichia coli and Salmonella lipopolysaccharides

During the last decade, episodes of sepsis have increased and Escherichia coli has remained the most frequent clinical isolate. Lipopolysaccharides (LPS; endotoxin) are the major toxic and antigenic components of gram-negative bacteria and qualify as targets for therapeutic interventions. Molecules that neutralize the toxic effects of LPS are actively investigated. In this paper, we describe a murine monoclonal antibody (MAb; WN1 222-5), broadly cross-reactive and cross-protective for smooth (S)-form and rough (R)-form LPS. As shown in enzyme-linked immunosorbent assay and the passive hemolysis assay, WN1 222-5 binds to the five known E. coli core chemotypes, to Salmonella core, and to S-form LPS having these core structures. In immunoblots, it is shown to react with both the nonsubstituted core LPS and with LPS carrying O-side chains, indicating the exposure of the epitope in both S-form and R-form LPS. This MAb of the immunoglobulin G2a class is not lipid A reactive but binds to E. coli J5, an RcP+ mutant which carries an inner core structure common to many members of the family Enterobacteriaceae. Phosphate groups present in the inner core contribute to the epitope but are not essential for the binding of WN1 222-5 to complete core LPS. Cross-reactivity for clinical bacterial isolates is broad. WN1 222-5 binds to all E. coli clinical isolates tested so far (79 blood isolates, 80 urinary isolates, and 21 fecal isolates) and to some Citrobacter, Enterobacter, and Klebsiella isolates. This pattern of reactivity indicates that its binding epitope is widespread among members of the Enterobacteriaceae. WN1 222-5 exhibits biologically relevant activities. In vitro, it inhibits the Limulus amoebocyte lysate assay activity of S-form and R-form LPS in a dose-dependent manner and it neutralizes the LPS-induced release of clinically relevant monokines (interleukin 6 and tumor necrosis factor). In vivo, WN1 222-5 blocks endotoxin-induced pyrogenicity in rabbits and lethality in galactosamine-sensitized mice. The discovery of WN1 222-5 settles the long-lasting controversy over the existence of anti-core LPS MAbs with both cross-reactive and cross-protective activity, opening new possibilities for the immunotherapy of sepsis caused by gram-negative bacteria.     

广播电视中心发展新趋势——多媒体化初探

本文讨论了多媒体技术所需的软硬件基础和网络传输技术，及其在数字化广播电视中心节目制作中的应用，展望了无磁带广播电视中心有美好前景，在此基础上提出了完整的广播电视中心多媒体系统结构图。     

一种用于DS扩频信号非相干检测的差分延迟SAW相关器

本文介绍了用于ＤＰＳＫ调制的ＤＳ扩频信号非相干检测的一种ＳＡＷ器件的设计方法。对所研究的差分延迟功能均集于单一器件中。因为没有采用独立的延迟线，故消除了带限影响，ＤＰＳＫ解调器延迟支路无插入损耗。     

Conductivities and some other properties of oxymethylene-linked 2-vinylpyridine-oxyethylene multiblock copolymers

Oxymethylene-linked 2-vinylpyridine-oxyethylene (2VP-EO) mulitblock copolymers doped with LiClO₄ or/and tetracyanoquinodimethane (TCNQ) showed ionic electronic and mixed (ionic-electronic) conductivity. Effects of the poly(oxyethylene) content and of the molar ratios of EO/Li and TCNQ/2VP on the conductivities of the complexes were studied. The optimum molar ratios of EO/Li and TCNQ/2VP were 10 and 1.0, respectively. The copolymers emulsified benzene/water systems and exhibited good phase-transfer catalysis properties in the Williamson reaction of solid potassium phenolate with n-butyl bromide. After neutralization with HCI solution, the copolymers showed polyelectrolyte solution properties.     

高岭土生产硫酸铝及沉淀法除铁的研究

对工业品硫酸铝的制备及沉淀法除铁的工艺进行了研究。实验结果表明，硫酸原料的质量分数可提高至６３％，用高锰酸钾作为除铁剂可除去产品中４５％～５０％的铁。     

硼酸铝钕(NAB)晶体光学均匀性的测量

NAB晶体是一种综合性能较好的新型激光工作物质,有希望做成高效的小型固体激光器。本文介绍一种测量这种晶体光学均匀性的方法。 一般都采用在干涉仪上观测干涉图样来判定激光棒的光学均匀性。NAB晶体的吸收光谱曲线显示出其在可见光光谱区内有多个吸收峰。我们注意到:通常用做激光干涉仪光源的He-Ne激光器发射的632.8nm谱线正位于NAB晶体的一个吸收峰,并用输出约为45mW     

千兆比以太网技术

千兆比以太网是一种新型高速局域网，它一方面兼容传统以太网的主要标准结构，保护了用户先前的投资和系统配置，并使系统升级方便，以较实际的价格赢得了支持的发展。另一方面，它又采纳了光纤通道的低层协议以及其他一些在行兆比速率下应作的改进，使它获得了高速宽带性能。本文还列举了从快速以太网和ＦＤＤＩ向千兆比以太网迁移的网络配置策略。