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With coupler embedded and acceleration sensitivity compensation design, the structure symmetry is insured, which can induce the acceleration sensitivity effectively. The acceleration sensitivity compensation design also improves the production efficiency of FOH for towed linear array application.2. A good theoretical simulation platform, utilizing the method of elastic mechanics and the finite element method, is established, which can provide an effect predictive design for FOH. The experimental results are in good agreement with the theoretical analysises.3. Some key technology problems in the making of FOH for towed linear array application are conquered. The new developed FOH, with an acoustic sensitivity of -143.0dB, has acceleration sensitivity less than -30dB, which exceeded to results from other international reports.
本论文的主要成果和创新在于:1、提出了耦合器内嵌、带加速度灵敏度微调补偿的低加速度灵敏度光纤水听器结构,最大程度保证了工艺结构的对称性,实现了对工艺误差的有效补偿,提高了低加速度灵敏度光纤水听器研制的成品率。2、采用弹性力学和有限元方法建立了拖曳线列阵光纤水听器理论设计平台,实验与理论分析结果相一致,这为优化光纤水听器的结构设计提供了有效的技术手段。3、解决了拖曳线列阵用光纤水听器制造的关键技术问题,研制出声压灵敏度为-143.0dB,加速度灵敏度低于-30dB的拖曳线列阵用光纤水听器,其加速度灵敏度优于国际上已报导的结果,并在国防水声一级计量站对其进行了性能指标测试(来源:A14BC论文网www.abclunwen.com)。
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To that end, Wadia and his colleagues found that iron pyrite—better known as fool's gold—was several orders of magnitude better than any of the alternatives, based on both cost and abundance.
为了这一目的,瓦迪亚和他的同事们发现硫化铁---俗称傻瓜金,从储量及价格上优于其它任何替代材料几个数量级之多。
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Forced oscillation is a convenient, quick, and noninvasive new method when applied to measure airway resistance and phase angle.
强迫振荡法是一种简便、快速、无创性测定气道阻力与相位角的新方法,适用于重症慢性阻塞性肺疾病患者,且对哮喘的用药观察优于传统肺功能测定。
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The Prophet said, A single endeavor in Allah's Cause in the afternoon and in the forenoon is better than the world and whatever is in it.
"该先知说,"一个单一的奋斗,在真主的事业在下午和在forenoon优于世界上无论是在它。
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The Prophet said, A single endeavor in Allah's Cause in the forenoon or in the afternoon is better than the world and whatever is in it.
"该先知说,"一个单一的奋斗,在真主的事业在forenoon还是在下午优于世界,无论是在它。
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That is why AMSOIL outperforms the other brands in the NOACK Volatility Test and the Four-Ball Wear Test.
这就是为什么AMSOIL优于在诺亚克波动测试其他品牌和四球磨损测试。
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The development direction changed direction according to the four-wheeler, the domestic and international company changes direction organization to control to the four-wheeler currently main adoption of is a numeral control, this is owing to a lot of advantages of numerical control:the procedure turn a control, the controller carries on the processing of operation and numerical information according to the control regulation designed, mainly passing procedure to carry out, if change control regulation need to change software, but need not change the hardware structure of system: control the accuracy is high, in the emulation the control the system, the accuracy of the controller from the accuracy of the component but settle, numerical controller accuracy from word long decision;Stability good;The software replies to use, needing a hardware environment of using the homology realization in the emulation the system, the numerical controller is a procedure control, the sub- procedure mold piece which need to be designed and write to carry out its model, can immediately carry out several links of functions expediently.
目前各个厂家大多采用的是PLC、单片机应用于四轮转向控制器中,功能基本能够实现,相比较之下,信号处理能力较强的数字信号处理器各方面均性能优于以上三种处理器。DSP是新世纪数字化革命的核心。它是一种独特的微处理器,具有可编程性,且实时运行速度远远超过通用微处理器。强大的数据处理能力和高速的运行速度,是DSP最值得称道的两大特色。DSP芯片是一种特别适合进行数字信号处理的微处理器。它强调运算处理的实时性,因此除了具备普通微处理器所强调的高速运算和控制功能外,主要针对实时数字信号处理,在处理器结构、指令系统和数据流程上做了很大的改动。它具有灵活、精确、可靠性好、体积小、功耗低和易于大规模集成等优点。
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The performance is significantly superior to the traditional Fourier analysis method.
仿真结果证明,提出方法的多普勒性能显著优于传统的傅里叶分析方法。
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Secondly, the difference of two Gaussians receptive field between fractional and integral differential of digital image was discussed in view of signal processing and biologic vision nerve model respectively.
计算机数值实验结果表明,对于纹理细节信息丰富的图像信号而言,分数阶微分对灰度变化不大的平滑区域中的纹理细节信息的增强效果明显优于整数阶微分运算。
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The results showed Antioxidant activity was very strong; at the concentration of 0.10g/L, The inhibition rate of superoxide anion free radical(Osuperscript – subscript 4 was 48.45%, The scavenging rate of hydroxyl free radical was 67.52%. Adding 0.1% of the extracts to lard, its antioxidant activity was better than that of 0.02% BHT. The extracts from peel showed higher activities than from juice.
结果表明:荸荠皮提取物的有明显的抗氧化活性,当浓度为0.10g/L时,对超氧离子自由基O(上标–下标 4的抑制率为48.45%,对羟自由基的清除率为67.52%,其0.1%提取物对猪油的抗氧化效果优于0.02%的抗氧化剂BHT,且其活性具有剂量效应关系。
- 推荐网络例句
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But we don't care about Battlegrounds.
但我们并不在乎沙场中的显露。
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Ah! don't mention it, the butcher's shop is a horror.
啊!不用提了。提到肉,真是糟透了。
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Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.
Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。