葛化有机磷农药废水生化处理中几个问题的探讨

<正> 武汉葛店化工厂是一个综合性的化工企业,1605、4049和乐果是其主要的有机磷农药产品。1976年以来,该厂对有机磷农药废水进行了表面曝气活性污泥法处理试验研

KHAWIA SAUROGOBII N. SP (CESTODA: CARYOPHYLLIDEA) FROM FRESHWATER FISH SAUROGOBIO SPP. (CYPRINIDAE) IN CHINA

Khawia saurogobii n. sp. is described from the intestine of the cyprinid fishes Saurogobio dabryi and Saurogobio dumerili in China. The new species belongs to the Lytocestidae and is placed in Khawia because of its afossate scolex, vitelline follicles in the cortical parenchyma, uterus not looping anterior to the cirrus sac, gonopores separate but close together in distinct genital atrium, external seminal vesicle absent, and postovarian follicles present. The new species differs from other congeneric species by the shape of the body markedly tapering posteriorly from the end of the anterior third, the shape of the scolex that is very short and markedly wider than the neck, spatulate without incisions, but shallow superficial grooves, vitelline follicles and testes starting immediately posterior to the scolex, and an ovary with long, posterior arms bent medially, thus giving the shape of an inverted A.

Design of Low Power Multi-Standard Active-RC Filter for WLAN and DVB-H

In this paper, a low-power, highly linear, integrated, active-RC filter exhibiting a multi-standard (IEEE 802.11a/b/g and DVB-H) application and bandwidth (3MHz, 4MHz, 9.5MHz) is present. The filter exploits digitally-controlled polysilicon resister banks and an accurate automatic tuning scheme to account for process and temperature variations. The automatic frequency calibration scheme provides better than 3% corner frequency accuracy. The Butterworth filter is design for receiver (WLAN and DVB-H mode) and transmitter (WLAN mode). The filter dissipation is 3.4 mA in RX mode and 2.3 mA (only for one path) in TX mode from 2.85-V supply. The dissipation of calibration consumes 2mA. The circuit has been fabricated in a 0.35um 47-GHz SiGe BiCMOS technology, the receiver and transmitter occupy 0.28-mm(2) and 0.16-mm(2) (calibration circuit excluded), respectively.

Hypersausage neural networks and its application in face recognition

In this paper, we firstly give the nature of 'hypersausages', study its structure and training of the network, then discuss the nature of it by way of experimenting with ORL face database, and finally, verify its unsurpassable advantages compared with other means.

黄埔发电厂5号机组保温状况的测试与评价

黄埔发电厂5号机组保温状况的测试与评价中科院广州能源研究所刘民义，仝兆丰黄埔发电厂陈丰保温是火力发电厂节能工作的重要方面，保温良好不仅可以减少散热损失，而且也可以提高机组运行的可靠性及快速启动能力［1］，改善环境并保证运行检修人员的人身安全。中科院广...

生长温度对InAs／GaSb超晶格晶体结构和表面形貌的影响

采用分子束外延（MBE）技术，在GaSb（100）衬底上外延生长InAs（4ML）／GaSb（8ML）超晶格（SLs）。研究了生长温度（400～440℃）对超晶格晶体结构和表面形貌的影响。结果表明，420℃生长的超晶格结构完整和表面粗糙度最小，其荧光光谱（PL）峰值波长在约2．54μm处，响应光谱50％截止波长在约2．4μm处。通过控制快门顺序形成InSb和混合两种界面，并发现生长温度强烈影响混合界面InAs／GaSb超晶格结构和表面形貌，而对InSb界面超晶格的影响较小。

1064nm RCE探测器光电响应特性分析

对1064nm谐振腔增强型（RCE）光电探测器（PD）的光电响应特性进行了分析研究．利用MBE生长技术得到有源区分别为量子阱和量子点的1064nm RCE探测器的外延片，并对制作的探测器进行了各种光电特性测试．结果表明量子阱结构的RCE探测器量子效率峰值达到57％，谱线半宽6～7nm，峰值波长1059nm；而量子点结构的RCE探测器量子效率峰值达到30％，谱线半宽5nm，峰值波长1056nm．通过分析量子效率和吸收系数之间的关系，对两种结构器件的吸收进行了比较，发现虽然量子点探测器的吸收小，但通过合理设计共振腔等方法也可以达到较高的量子效率．两种结构的器件都有很好的I-V特性．

Wet Oxidation of AlxGa1-xAs/GaAs Distributed Bragg Reflectors

The wet oxidation of AlGaAs with high Al content in a distributed Bragg reflectors （DBR） is studied by scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. Some voids distribute along the oxide/GaAs interfaces due to the stress induced by the wet oxidation of the AlGaAs layers. These voids decrease the shrinkage of the Al2O3 layers to 8% instead of the theoretical 20% when compared to the unoxidized AlGaAs layers. With the extension of oxidation time, the reactants are more completely transported to the front interface and the products are more completely transported out along the porous interfaces. As a result,the oxide quality is better.