952 resultados para Minamoto, Yoshitsune, 1159-1189


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介绍了应用油团聚(SGHFF) 技术高效脱除煤炭中硫的过程, 探讨了煤炭粉碎粒度及水量对煤炭中硫的脱除率的影响。实验结果表明, 硫含量为2.16 % 的烟煤, 脱除率可达到67 % 。

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垃圾是困扰中国许多城市的一个严重问题。本文对中国城市垃圾的产量、成分、物化性质、垃圾的各种处理方式进行了简要的介绍。并对垃级焚烧过程中污染物的产生及控制作了一定的阐述。从能量回收和资源利用两个角度介绍了解决中国垃圾问题的方法。

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应用热扩散式树干茎流计(TDP)于2008年4~10月对黄土高原安塞县侧柏人工林树干液流速率进行了连续测定,并对周围气象、土壤水分等多个环境因子进行了同步测定。结果表明:侧柏在不同月份晴天树干液流速率变化具有明显的昼夜节律性,呈单峰曲线;且各月液流速率日均值受土壤供水水平限制总体上呈下降趋势,即4月份最大,为0.00135cm.s-1;10月份最小为0.00011cm.s-1;树干液流速率与光合有效辐射、大气温度、水汽压差呈极显著正相关,与相对湿度呈负相关,其相关程度:光合有效辐射>水汽压差>大气温度>相对湿度,并可用线性表达式来估算;侧柏边材面积和地径呈幂指数关系,并以此结合密度估算出样地侧柏人工林的边材面积为4.65m2,最终估算出侧柏人工林生长季总耗水量为1159.6t.hm-2。

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This paper presents an LC VCO with auto-amplitude control (AAC), in which pMOS FETs are used,and the varactors are directly connected to ground to widen the linear range of Kvco. The AAC circuitry adds little noise to the VCO but provides it with robust performance over a wide temperature and carrier frequency range.The VCO is fabricated in a chartered 50GHz 0.35μm SiGe BiCMOS process. The measurements show that it has - 127. 27dBc/Hz phase noise at 1MHz offset and a linear gain of 32.4MHz/V between 990MHz and 1.14GHz.The whole circuit draws 6. 6mA current from 5V supply.

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We analyze a wide-band,high-linearity down-conversion mixer for cable receptions that is implemented in 0. 35μm SiGe BiCMOS technology. The bandwidth of the RF (radio frequency) input covers the range from 1 to 1.8GHz. The measured input power at the - 1dB compression point of the mixer reaches + 14.23dBm. The highest voltage conversion gain is 8. 31dB, while the lowest noise figure is 19.4dB. The power consumed is 54mW with a 5V supply. The test result of the down-conversion mixer is outlined.

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介绍了偏振差分反射光谱的原理,并结合半导体材料平面内光学各向异性的来源,总结了偏振差分反射光谱作为一种重要的表面、界面分析技术在半导体材料研究中的应用,并分析指出其在Si基材料电光改性研究中将会起到重要作用。

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该文介绍了优先度排序径向基函数(PORBF)神经网络的结构与算法,并提出了将其应用于与文本无关说话人确认时的训练算法,似然度的计算方法以及识别规则。为了增强PORBF网络的泛化能力,该文用压缩矢量构造抑制样本集,提出了顺序选取、最近邻选取和最远距离选取等3种选择抑制样本集中说话人的方法,并对PORBF神经元的输出进行了等比递减加权。在相同条件下的与文本无关说话人确认实验中,传统的矢量量化方法的等差错率可达10.56%,而基于PORBF网络的确认系统使用最近邻选择方法构造抑制样本集,其等差错率可达6.83%,性能提高很多。

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