查询词典 experimental method

In chapter 4, by AREELS, the Generalized Oscillator Strength Density Spectra were measured in the energy region from 56 to 66eV, with the incident energy 2. 5 keV and energy resolution 80 meV, at scattering angles from 0°to 6°, corresponding to the momentum transfer K〓=0.03~2. 01 a. u. The Fano profile parameters f〓 and q for the optically allowed transition 〓(0, 1)〓P°and the optically forbidden transitions 〓(1, 0)〓S〓and 〓(1, 0)〓D〓 were obtained as a function of K〓. With the hyperspherical coordinate wavefunctions, the dynamical correlation are discussed qualitatively. So, a new experimental way to study dynamical electron correlation effect is opened.In chapter 5, the widely used R-matrix theory was introduced. Then, the GOSDS for the optically allowed excitation series (1s〓)〓S〓→〓(0, 1)〓P°(n=2-4) were calculated by this method, and the Fano profile parameters f〓 and q were obtained sequently. So the electron correlation effect can be described by these parameters quantitatively, and the theoretical results were compared with our AREELS experimental results.

在第四章中，实验上，同样使用角分辨的高能量分辨快电子能量损失谱仪，在2.5keV电子入射能量和80meV的能量分辨下，测量了0°到6°散射角下的He原子双电子激发态在56~66eV的广义振子强度密度谱，这种情况，0°~6°对应的动量转移范围K〓=0.03~2.01a.u。，得到了光学允许跃迁的双电子激发态〓（0，1）〓P〓和光学禁戒跃迁的双电子激发态〓（1，0）〓S〓、〓（1，0）〓D〓的Fano线形参数f〓，q等随动量转移变化的曲线；观测到了几个强度很弱、能级很窄的光学允许和禁戒跃迁双电子激发态，用前人准确的理论结果进行了标识；通过比较弱共振〓（1，0）〓S〓和〓（-1，0）〓S〓的强度随动量转移K〓的变化规律，结合超球坐标理论计算的波函数，定性地阐述了在电子碰撞散射过程中它们各自不同的动力学电子关联效应，发展了一套在实验上研究电子关联效应的新方法。

This research mainly adopts experiment, survey questionnaire, interview method, the experimental chemistry of several typical topic such as "separation of iodic element of kelp and inspection" and the properties of aluminum compounds "toothpaste and match in some ingredients" sodium nitrite and identification of salt experimental subjects were studied.

本研究主要采用实验法、调查问卷法、访谈法，对《实验化学》中的几个典型课题如&海带中碘元素的分离及检验&&铝及其化合物的性质&&牙膏和火柴头中某些成分的检验&&亚硝酸钠和食盐的鉴别&等实验课题进行研究。

Methods The nitroglycerin experimental migrainous animal model was reconstructed for the expression of c-fos and c-jun by means of immunohistochemical method Results The nitroglycerin experimental migrainous rats appeared reddish two ears, head shaking,scratching head with forepaws, activity increasing, both the number increasing and the area enlarging of the positive cells of the expression of c-...

免疫组化ABC法研究偏头痛大鼠脑组织即刻早期基因c -fos、c -jun的表达。结果硝酸甘油型实验性偏头痛大鼠出现双耳发红、甩头、前肢频繁搔头，活动增加等外在表现，脑组织c -fos、c -jun基因表达阳性细胞数增加，基因表达阳性细胞的面积扩大、灰度降低或变化不大。结论硝酸甘油型实验偏头痛大鼠模型复制方法简单、重复性较好、脑组织c -fos和c -jun基因异常表达明显，可以作为偏头痛治疗药物筛选、药效评价和发病机理研究的动物模型。

This research was conducted under the standard experimental method,"nonequivalent pretest-posttest control group design", sampling from two third grade classes in Xing-xing elementary school in Taipei County as experimental class and control class respectively.

本研究旨在依据Williams创造思考教学模式，发展国小自然科教材设计，并经八周共32节的实验教学后，以探讨威廉斯创造思考教学模式教材设计对国小学生创造力认知、情意及自然科学业成就之影响。

Experimental studies were conducted at the Yucheng Comprehensive Experimental Station of the Chinese Academy of Sciences during the period from March to June in 2003 . Respiration of a pulverous sandstone soil was studied under cultivation of winter wheat over a growth season . Soil CH4 was measured by the Static-Chamber method combined with Gas Chromatography technique .

本文利用静态箱／气相色谱分析的方法，在中国科学院禹城综合试验站，对华北平原冬小麦生长旺季期间麦田土壤中CH_4气体通量进行了测定，试验起止时间为2003年3～6月，得出华北平原典型冬麦田土壤是大气CH_4的弱吸收汇。

With the support of a major research grant of Zhejiang Province (No. 001101027) and the Plan of Promoting Education of Excellence of Zhejiang University in the 21st Century, this dissertation is devoted to address the above problems and fabricate an L-band EDFA with low cost, high performance and technological innovation.First the mechanism of an erbium doped fiber amplifier is introduced. Various theoretical models based on classical rate propagation equations are summarized and compared for their applications. We use a modified numerical model based on the Giles model, which agrees with the experimental results well. This serves as the theoretical base for the whole thesis and will be used to optimize the characteristics of EDFAs. A novel method based on a map of noise figure and gain is proposed to analyze efficiently the dependence of the noise figure and gain for EDFAs on the EDF length and the pump power. The characteristics of various EDFAs are studied and compared.Secondly, some important parameters are introduced to describe the characteristics of EDFAs. The methods and the experimental setups for measuring the gain and noise figure of an EDFA are emphasized. We introduce how to measure the characteristics of each component of an EDFA, especially the gain and absorption coefficient of an erbium doped fiber.Thirdly, four types of simple and novel L-band EDFA structures with low noise, high gain and low gain ripple are proposed to satisfy the requirement of a DWDM system. They can be classified into two categories. In the first category, a single ASE pumping is served asa secondary pump. This category includes the following three types. Type: a new construction using a fiber Bragg grating in an unpumped EDF section at the input side. Type: a new structure of L-Band EDFA with two-stage pumps, which utilizes the forward ASE as a second pump.

本论文本着科技创新、服务于生产实践的精神，以设计价格低廉，性能优越、结构合理简单的L-band EDFA为目标，依托浙江省科技厅重大科学基金资助项目(001101027)和浙江大学振兴教育计划资助的全光网络的搭建—《光通信技术》课程实验建设项目，展开了如下工作：首先，介绍了掺铒光纤放大器的工作原理，归纳总结了基于速率方程基础的EDFA的各种理论模型，分析比较了各个模型的特点和适用场合，最终选择完善的Giles理论模型作为本论文分析设计EDFA的理论基础；针对实际实验条件提出了修正的EDFA模型的数值计算方法；创新地提出了增益—噪声系数全局分析法，直观有效地分析了EDFA的增益和噪声系数与掺铒光纤长度和泵浦功率的依赖关系，并对各种EDFA的性能作了全面的比较；第二，介绍了掺铒光纤放大器特性参数的定义与测量方法，重点介绍了噪声系数和增益系数的测量方法及实验装置；介绍了组成掺铒光纤放大器各组件的特性测量方法，重点介绍了测量掺铒光纤参数的方法和实验装置；第三，针对WDM系统对L-band EDFA谱平坦、低噪声、高增益的要求，我们创新地提出了四种不同的L-band EDFA结构，按设计思路可以分为两大类：一类是基于单抽运二级泵浦法，这一类包括在未泵浦掺铒光纤的输入端插入一根布拉格光纤光栅的两段L-band的EDFA的新结构；基于前向ASE光作为二级泵浦源推动下一级EDF工作的泵浦分配、两段级联L-band的EDFA的新结构；基于单根光纤光栅、泵浦分配、两段级联的EDFA；另一类则是基于同时应用前后向C-band ASE作二级泵浦源的双抽运法，如基于前后向ASE光作为二级泵浦源的三段级联L-band的EDFA的新结构。

Hypoxic-ischemic encephalopathy experimental grouping: Sixteen successful C57/BL6J mice models, aged 7 days, were randomized into 2 groups: experimental group (n =8), following ligation of right common carotid artery, mice were placed in the closed container containing 0.08 volume fraction of oxygen and 0.92 volume fraction of Nitrogen gas, and taken out 1.5 hours later; 3 μL ESCs were injected into the right cerebral ventricle at about 1 week, and control group (n =8), in which, the same amount of PBS was injected into the right cerebral ventricle.③ At 12 weeks after transplantation, the survival and migration of induced ESCs labeled by Lac-Z in the spinal cord and brain were observed by zymologic method.

缺氧缺血性脑病实验分组：将造模成功的鼠龄7 d的C57/BL6J16只小鼠随机分为2组：实验组8只，结扎右侧颈总动脉后将小鼠置入含体积分数0.08氧气和体积分数0.92氮气的密闭容器内，1.5 h后取出；1周后在右侧脑室内注入3 μL诱导胚胎干细胞。

Finally, the experimental setup of MR intelligent boring bar was built on the CA6140 type lathe. The experimental results show that the method can suppress the chatter efficiently and can improve the surface quality of workpieces significantly, whose roughness has decreased from 10 μm to 1.5 μm.

最后，在车床CA6140上搭建了磁流变智能镗杆的颤振抑制实验系统，实验结果表明，变结构刚度方法能够快速高效地抑制镗削过程中产生的颤振，并且使加工表面的粗糙度Ra从10μm降至1.5μm，大幅度提高了加工表面质量。

An application of conjugate gradient method to fit concrete creep coefficient is in good agreement with experimental results. 4. There are 8 CFST members bearing capacity tests with different initial stress factor and eccentric distances having been launched. 5. A generalized analysis program which could be considered steel tube initial stress influence of CFST arch bridge is developed. The correct and accuracy of the program were verified by the experimental results of the axis, eccentric compression initial stress CFST member and a model of CFST arch bridge.

应用共轭斜量法拟合混凝土徐变系数，拟合结果与试验值吻合良好； 4、开展了8根不同初应力系数和偏心距的钢管混凝土初应力构件承载力试验； 5、编制了钢管混凝土拱桥考虑钢管初应力影响的综合分析程序，程序得到轴心受压、偏心受压初应力试验构件和模型拱桥的验证。

Taguchi Method was used to do experimental designs and analysis in the study. Cypress essential oil was selected to use in the slim therapy process to get the best experimental result.

本研究透过田口方法进行实验设计与分析，將檜木精油运用於瘦身疗程，產生出最佳瘦身效果之参数组合。

Green function defined inphase space differs from one in coordinate space by its struc-ture which exhibits nonlocatity in coordinates and oscillatorybehavior with respect to momenta.

在相空间中定义的Green函数不同于通常坐标空间的Green函数，在结构上显示出对坐标的高度非局域性，而对动量则显示出振荡行为。

The upper front part of a saddle;a saddlebow.

前鞍桥马鞍前面的上部分；前鞍桥