Liquid Flow in Shaped Fiber Bundle

By computation and comparison of the critical spreading coefficient parameter, it was found that shaped fiber bundle is better for wetting. Liquid-air interface tension of liquid arising the shaped fiber bundle body is considered as one critical factor besides liquid viscosity, inertia force and liquid-fiber interface tension. Experimental result simulation demonstrated that the liquid-air interface tension is correlated with the geometric size of the liquid arising in body, Φ0 （x） and which is affected by the cross sectional shape of fiber and the radius of single fiber. The shaped fiber bundle model is/ntroduced to/nvestigate liquid flow in fiber assembly. The model is generated based on a random function for stochastic forming of fibers in bundle and it is necessary to combine this fundamental model with physical explanation for investigation of liquid flow in fiber assembly.     

一种基于导频的OFDM系统信道估计方法

提出一种使用矩形导频图案的OFDM信道估计方法。接收端首先在频率方向估计信道,然后在时间方向插值。该方法仅需累加和少量乘法运算就能估计出信道冲激响应,复杂度低,实时性高。在未编码16QAM-OFDM系统中,通过仿真将提出的方法与线性、cubic和MMSE插值法进行均方误差和误比特率的比较。结果表明该方法性能优于前两者,接近后者。     

论江西红色旅游资源开发中的问题与对策

江西素有“物华天宝、人杰地灵“的美誉,红色旅游资源十分丰富,是全国红色旅游的发源地,发展红色旅游对江西地方经济具有重要的意义,但目前对红色旅游资源开发中存在一些问题和不足,本文试图分析其存在的问题,提出解决问题的对策.     

预设在翻译中的应用

预设是一种复杂的语言现象,具有经济性、有效性、突显性等功能。大部分语言共有的预设可以直译,但具有鲜明文化色彩的、不易于目标语文化接受的要分类待之,这样才有助于透彻理解原文,从而依据具体情况对源语预设信息进行处理。本文就预设的概念、功能及翻译技巧进行了讨论,力求将源语的预设信息通过各种手段在目标语中传达出来,以达到促进跨文化交流的目的。     

教育科学学院在师范大学教师教育改革中的作用

教育科学学院应坚持为教师教育改革服务的办院方针，将教师教育研究与反思肾密结合起来；按照教师培养终身化的要求构建课程体系，实现职前教育、入职教育和职后教育的一体化；推进教师教育信息化进程，提高教师教育的水平和质量。     

超声吹脱处理氨氮废水工艺条件的试验研究

通过对高浓度氨氮废水的超声吹脱正交试验,确定了试验的最佳工艺条件:pH为11,吹脱时间为90 min,吹脱温度为40℃,超声波功率为80 W.在此最佳吹脱条件下,氨氮的去除率可以达到99%以上,吹脱后废水中的氨氮浓度小于100 mg/L.     

固相萃取GC-MS/MS法检验家兔血液尿液中氯胺酮

目的:建立家兔血尿中氯胺酮的检验方法。方法:用1mol/L氢氧化钠溶液调待检血尿液pH为9~10,上GDX403柱,以氯仿洗脱。选取209m/z离子碎片为母离子,进行GC-MS/MS分析,通过与氯胺酮标准品的保留时间及二级质谱图比对定性,外标定量。结果:尿中氯胺酮在0·4~4·0μg/mL范围内线性关系良好,所得标准曲线的回归方程为:y=3990·31 47045·2x,r=0·9995;血中氯胺酮在40~200ng/mL范围内线性关系良好,所得标准曲线的回归方程为:y=7920·5 40137·2x,r=0·9998。血中最低检测浓度为2ng/mL,尿中最低检出浓度为4ng/mL。血液平均回收率96·62%;尿液的平均回收率为89·36%。     

半波损失的本质

本文分别讨论了机械波、电磁波、物质波在两种介质的分界面正入射传播时产生半波损失的本质.     

Photocatalytic degradation of trace-level of MicrocystinLR by nano-film of titanium dioxide

The occurrence of toxic water bloom of cyanobacte-ria algae, widely reported in eutrophic freshwater, hasbeen a serious pollution problem in recent years[1]. Mi-crocystins (MCs), the most common cyanobacteriatoxin with a cyclic heptapeptide structure (Fig…     

SHRIMP zircon U-Pb dating for volcanic rocks of the Dasi Formation in southeast Hubei Province, middle-lower reaches of the Yangtze River and its implications

The Jinniu Basin in southeast Hubei,located at the westernmost part of middle-lower val-ley of the Yangtze River,is one of the important vol-canic basins in East China. Volcanic rocks in the Jin-niu Basin are distributed mainly in the Majiashan Formation,the Lingxiang Formation and the Dasi Formation,consisting of rhyolite,basalt and basaltic andesite,(trachy)-basalt and basaltic trachy-andesite and (trachy)-andesite and (trachy)-dacite and rhyolite respectively,in which the Dasi volcanism is volumet-rically dominant and widespread. The Dasi volcanic rocks were selected for SHRIMP zircon U-Pb dating to confirm the timing of volcanism. The results indi-cate that there exist a large amount of magmatic zir-cons characterized by high U and Th contents in the volcanic rocks. The concordia ages for 13 points are 128 ± 1Ma (MSWD = 3.0). On account of the shape of zircons and Th/U ratios,this age is considered to represent the crystallization time of the Dasi volcan-ism. The volcanic rocks in the Dasi,Majiashan and Lingxiang Formations share similar trace elementand REE partition patterns as well as Sr-Nd isotopic compositions. In combination with the regional geol-ogy,it is proposed that the southeast Hubei volcanic rocks were formed mainly during the Early Creta-ceous,just like other volcanic basins in middle-lower Yangtze valley. A lithospheric extension is also sug-gested for tectonic regime in this region in the Cre-taceous Period.