平板膜SMBR装置处理焦化废水的试验

介绍了平板膜SMBR装置在焦化厂的试验,结果表明,利用平板膜SMBR处理焦化废水具有抗冲击能力强、氨氮及COD的脱除效率高、污泥浓度稳定、污泥产生量少、膜抗污染能力强、清洗周期长、出水指标稳定等优点,外排水可达国家一级排放标准。     

SOFC连接体用STS444/Y合金的高温导电性能研究

以固体氧化物燃料电池(SOFC)金属连接体为研究对象,分析铁素体不锈钢STS444涂覆稀土元素Y后在750℃下的高温氧化和导电行为。利用辉光放电光谱(GDS)和二次离子质谱(SIMS)技术研究了主要元素(Fe,Cr,Mn,Si)和稀土元素Y对氧化膜生长和高温导电性能的影响。结果表明,Y元素的活性元素效应使STS444/Y合金可以显著改善其抗氧化性和高温导电性,可作为SOFC金属连接体的候选材料。     

N2O decomposition over the circulating ashes from coal-fired CFB boilers

The catalytic decomposition of N₂O over the circulating ashes from coal-fired circulating fluidized bed (CFB) boilers was investigated with a fixed bed reactor. The associated kinetics was mimicked by four surrogate metal oxides of SiO₂, Al₂O₃, CaO and Fe₃O₄, which were found as the main components of the circulating ashes. The activation energies and collision coefficients for N₂O thermal decomposition over the circulating ashes and surrogates were individually measured. Experimental results showed that different metal oxides play different roles in the catalytic decomposition of N₂O. Among the components, CaO and Fe₃O₄ are very active, while Al₂O₃ and SiO₂ contribute much less to N₂O destruction. A model based on the specific surface-area-weighted kinetic data of individual surrogates was developed to predict the catalytic decomposition of N₂O over circulating ashes. The predictions agreed with the experimental data with a minor discrepancy acceptable in an engineering view. Some discussions on the discrepancy were given. The O₂ effect on the N₂O decomposition over the circulating ashes was experimentally assessed. It was found that the presence of O₂, even with a small amount, would deteriorate the catalytic decomposition of N₂O.     

纺纱张力控制技术的研究

在论述现有纺纱张力控制方法的基础上，提出采用模糊控制方法的合理性，实验结果表明，模糊控制纺纱张力对抑制张力峰值降低纱线断头率是行之有效的，不仅能降低纺纱张力的波动的幅值，还改善了张力的离散性指标。     

单线态氧与环境友好的纸浆漂白

简要介绍了单线态氧的性质、制备方法和应用领域,着重介绍了近期单线态氧用于纸浆漂白方面的有关研究和探索.相关研究表明,单线态氧对木素具有较强的降解能力,在漂白过程中具有较好的选择性,尤其是采用光催化法制备单线态氧用于纸浆的漂白,化学药品消耗少,对环境友好,进一步深入研究将具有广阔的应用前景.     

广西钦州:以林浆纸一体化为载体促进速丰林基地建设

介绍了广西饮州市实施林浆纸一体化，促进速丰林基地建设的经验。     

蒸发末效汁汽废热加热蔗汁的新工艺研究

提出了蒸发末效汁汽废热加热蔗汁的新工艺。通过喷射式直接换热器,用水吸收蒸发末效汁汽的热能,然后采用板式换热器,利用吸收了热能的热水来加热蔗汁。如果把蒸发末效汁汽温度控制到70℃,汁汽可以将水的温度从30℃提升到65℃,热水可将蔗汁的温度从25℃提升到60℃,满足了蔗汁一次加热的温度要求。此外还对新工艺进行了效益分析,对于日榨10 000 t甘蔗的糖厂,一个榨季可节约蔗渣25 229 t/a,即节约燃料费1 261万元人民币。工艺达到了节能减排的效果,且效益显著。     

A ROBUST ADAPTIVE VIDEO ENCODER BASED ON HUMAN VISUAL MODEL

A Robust Adaptive Video Encoder (RAVE) based on human visual model is proposed.The encoder combines the best features of Fine Granularity Scalabla (FGS) coding,frame-dropping coding,video redundancy coding,and human visual model.According to packet loss and available bandwidth of the network,the encoder adjust the output bit rate by jointly adapting quantization step-size instructed by human visual model,rate shaping,and periodically inserting key frame.The proposed encoder is implemented based on MPEG-4 encoder and is compared with the case of a conventional FGS algorithm.It is shown that RAVE is a very efficient robust videl encoder that provides improved visual quality for the receiver and consumes equal or less network resource.Results are confirmed by subjective tests and simulation tests.     

全空域多目标测控天线技术研究

航天技术的快速发展使得在轨飞行器的数量迅速增长,传统上基于抛物面天线的测控技术已经不能满足未来全空域内同时多目标测控的需求,为此,提出了一种解决方案,采用共形阵列天线和数字多波束形成技术,在全空域内同时形成多个波束,每个波束指向一个测控目标,实现同时对多目标的测控。根据提出的方案,研制了原理样机,进行了外场试验,结果表明样机的功能和主要技术指标与设计相符合,证明了技术方案的正确性。