查询词典 spectrum line

Study on transmission spectrum of ZnO films;2. Study of Measuring Grating Parameters with Transmission Spectrum and Design of Perfect Anti-reflection Coating;3. Kinetics of the oxidation process of the copper films in the thickness range of 16～22 nm at 140 ℃ was studied by using transmission spectrum and sheet resistance methods.

采用方块电阻和透射光谱两种方法为表征手段，测量16～22nm范围内不同厚度Cu薄膜在140℃下完全氧化所需要的时间，得到了Cu薄膜氧化反应的动力学曲线，并利用X射线衍射分析了氧化产物的晶相结构和成分。

The invention chooses single or double color fixing wavelength to respectively project single spectrum, and the plurality of LEDs stable spectrum property project a constant spectrum with the range between 380nm-780nm, further the invention is low in energy-consumption, small in volume, environment-friendly, fast in response speed, long in useful life, fine in stability, and high in accuracy, thereby the invention is a product to take place tungsten halide lamp illuminant.

本发明选用单一或双色固定波长、分别发射出单色光、以及光谱性能稳定的多个LED组合发出光谱范围在380nm～780nm之间连续光谱，能耗低、体积小、环保、响应速度快、寿命长、稳定性好、精密度高，是卤钨灯光源更新换代产品。

The holistic design of the system and resolved the designs of software and hardware based on VXI bus are put forward according to the demand of test system. The hardware and software is designed, including the formation and design of hardware system, visual instrument software architecture, program design for instrument driver, high speed real-time data collection. In the dynamic test program, the idea of"software is instrument"was applied to meet the diverse test demands. Last, it is proposed that the VXI test system be developed to more totalization and networked. The basic theory of system identification was introduced briefly at first. The principle of spectrum analysis system identification based on Wiener-Hopf equation was expatiated. and the questions in applying Peusdo Random signal as spectrum analysis methods stimulate signal was studied, The generation principle of the peusdo random signal is researched, the characteristic of peusdo random are analyzed from time domain and frequency domain, the inverse repeat peusdo random signal is brought forward to make up the shortage of ordinary peusdo random signal. And a new chaos genetic algorithmis presented to solve the unprecise problem of the traditional method. In the servo valve dynamic characteristic test system, the spectrum analysis methods was applied successfully, the servo valve dynamic characteristic could be acquired rapidly and exactly, the test results were analyzed and the ameliorate methods were brought forward at last.

结合航天某集团液压测试中心测试系统的需求，提出了基于VXI总线的液压测试系统的整体设计方案，完成了测试系统的硬件设计与软件设计，包括硬件系统构成与设计、虚拟仪器软件结构、仪器驱动程序设计、高速同步实时数据采集等内容；以伺服阀动态特性测试为例设计了测试模块，该模块体现了VXI总线仪器软件开发所倡导的"虚拟仪器"的思想，以软件的灵活应用满足了不同的测试需求；结合自动测试系统的发展，研究了VXI测试系统与网络技术结合，实现各种软硬件资源共享，进一步提高设备及数据的利用率和系统的扩展性，使自动测试向综合化、网络化方向发展；研究了伪随机信号作为谱分析法辨识的激励信号时存在的问题，讨论了伪随机信号的产生机理，从频域和时域分析了伪随机信号的性质及其应用，提出了用逆重复伪随机信号弥补了普通伪随机信号的不足，并以混沌遗传算法对逆重复伪随机信号产生过程中的参数进行优化，可以更合理而不是凭经验产生需要的逆重复伪随机信号。

Based on the results of Fisher linear discrimination analysis,the first principal component score spectrum of three-dimensional fluorescence spectrum is chosen as the identification characteristic spectrum for Bacillariophyta and Pyrrophyta,and the phytopla...

根据Fisher判别分析结果，选用三维荧光光谱的第一主成分得分谱作为硅藻和甲藻的识别特征谱，建立了浮游植物荧光特征谱库。

Based on the results of Fisher linear discrimination analysis,the first principal component score spectrum of three-dimensional fluorescence spectrum is chosen as the identification characteristic spectrum for Bacillariophyta and Pyrrophyta,and the phytopla.

将浮游植物三维荧光光谱与主成分分析方法相结合，针对我国东海常见的12种藻建立了硅藻和甲藻的识别测定技术。

Based on the results of Fisher linear discrimination analysis,the first principal component score spectrum of three-dimensional fluorescence spectrum is chosen as the identification characteristic spectrum for Bacillariophyta and Pyrrophyta,and the phytopla.

将浮游植物三维荧光光谱。主成分分析方法相结合，针对我国东海常见的12种藻建立了硅藻和甲藻的识别测定技术。

The databases of NIRDRS for Hypericum、 Eucalyptus globules and broussonetia papyrifera were established within suitable spectral ranges with three kinds of data block(original spectrum, first-order derivative spectrum and second-order derivative spectrum) to discriminate unknown samples.

分别用三种数据块(原谱、一阶导数光谱、二阶导数光谱)在不同的谱区范围建立了金丝桃、蓝桉、楮实子3种中药材的NIRDRS指纹图谱库，对未知样品进行鉴别。

The characteristic of this method is to use two reflective spectra: one is the spectrum of cholesteric LC, the other is the spectrum of reflector compensating each other to broaden the spectrum of the display.

这个方法的特性是用胆固醇液晶和下板反射板的两个反射频谱叠加在一起来加大整个胆固醇液晶显示器的反射频谱。

The free radical scavenging properties of six Aloe species are to be investigated in some modified chemical system. The antioxidant was purified by silica column and thin layer chromatography and analyzed by HPLC. A fraction was purified from A. brevifolia Mill showed the most effective scavenging activities on 〓 and ·OH (66. 01% and 38. 98% respectively). With the analysis of IR spectrum, UV spectrum and mass spectrum, the structure of FA was identifed as 8-C-D-glucopyranosyl-2- [2-hydroxy] propyl-5-methyl-7-hydroxychromone. Its scavenging activity on free radicals is higher than that of aloe-emodin. Its antioxidant activity may be due to the phenoxyl on glucosyl chromone which can be react with free radicals and form relatively stable free radicals.

本研究利用分别产生超氧阴离子自由基和羟自由基的化学模型体系研究比较了不同品种芦荟提取物的清除活性氧自由基的抗氧化作用，进一步利用硅胶柱结合薄层层析法和反相高压液相色谱法，从短叶芦荟叶子中首次分离了具有较强自由基清除能力（超氧阴离子自由基和羟自由基清除率分别为66.01％和38.98％）的成分FA，利用红外光谱、紫外光谱和质谱等仪器分析结果推断出该活性成分的分子结构为8-C-吡喃葡萄糖-2-[2-羟基]-丙基-5-甲基-7-羟基对氧萘酮，它的自由基清除能力高于芦荟大黄素，是一种天然抗氧化剂。

In order to clarify the rules of POD isoenzyme in the hazelnut, identify their blood relations between female, male and filial generations and select the superior parents for cross-breeding, we have studied the characteristics of peroxidase isoenzyme which are distributed in the 34 hazelnut varieties or lines by polyarclamide gel electrophoresis, The results showed that:POD isoenzymes of Corylus heterophylla Fisch, Corylus avellana L, and the hybrid of Corylus heterophylla Fisch × Corylus avellana L had obvious difference; some hybrids had lost P10 spectrum band of parents; the enzyme spectrum of 32 hybrid hazelnuts produced 'new hybrid spectrum bands'that could be considered as a mean to identify hybrids.

为了阐明过氧化物同工酶在榛品种中的分布规律，探讨平榛、欧榛及其杂种榛之间的亲缘关系，选育优势杂交亲本，本试验采用聚丙烯酰胺凝胶垂直电泳，研究了34个榛品种成熟叶过氧化物酶同工酶酶谱特征，结果表明：平榛、欧榛及其平欧杂种榛品种间酶谱具有较大差异；有的杂种品种遗失了父母本共有谱带P10；32个平欧杂种榛品种出现了双亲所不具有的新酶带，可作为鉴别杂种的一条途径。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？