实验
- 与 实验 相关的网络例句 [注:此内容来源于网络,仅供参考]
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On the basis of researches above, a prototype which consists of two paralleled DC/DC SEPIC converters with coupled inductors is designed. Some experiments have been made. The experimental results show that the approach proposed is accurate and feasible again.
同时,在此基础上,本文搭建了由两个具有耦合电感的SEPIC变换器并联所构成的实验平台,并通过该实验平台对所提出的单周期均流控制策略进行了实验研究,实验结果再次证明了该均流控制策略的正确性和可行性。
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The morphological changes: The morphological observation of the aorta section showed that, in model group, space in subendothelial layer area widened, and there presented many small vacuoles and even large vacuoles in some areas.
血清中炎性因子含量的变化:CRP和TNF-α是早期炎症反应的两种较为敏感的指标,本实验观察到,随着实验天数的增加,模型组和预防组大鼠血清CRP含量均急剧上升。与实验前相比,实验开始后10天、17天以及24天的CRP含量均明显升高(P.05)。
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Similar to that, compared to the mouse model of memory impairments of acquisition, retention and retrieval induced by scopolamine, sodium nitrite and ethanol D-galactose, the blank control group, SZF group and positive control group could prolong the latency and reduce errors in step-down test and avoiding dark test.The result bioassay showed that SZF group incresed the activity of SOD and level of TChE and decreased the level of MAD in mice brain tissue.
东莨菪碱、亚硝酸钠和乙醇分别诱导的小鼠学习记忆获得、巩固和再现障碍实验结果表明,与模型组比较,在跳台和避暗测试中,空白对照组、SZF复方和阳性对照组均能延长跳台实验和避暗实验的潜伏期(P.01,P.05),均能减少实验中的错误次数(P.01,P.05)。D-半乳糖、东莨菪碱、亚硝酸钠和乙醇诱导的小鼠脑组织生化测定的结果显示,与模型组比较有显著差异,SZF复方表现为能使脑组织中总SOD活力上升,MDA含量降低,TChE含量上升。
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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。
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An experimental platform based on a three-dimensional digital imaging system with a microlens array was setup to reconstruct the elemental image array of a die captured in experiment, a volumetrically original image was reconstructed through this algorithm successfully.
搭建了基于微透镜阵列的三维数字成像系统实验平台,利用此算法对实验中获得的骰子基元图像阵列进行重构,成功地重构出原始物体的三维立体图像,在理论上和实验上证明了这种重构算法的有效性和可行性,并对实验中影响成像质量的因素进行了分析。
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An experimental platform based on a three-dimensional digital imaging system with a microlens array was setup to reconstruct the elemental image array of a die captured in experiment,a volumetrically original image was reconstructed through this algorithm successfully.It is proved that the algorithm is feasible and valid both theoretically and experimentally.
搭建了基于微透镜阵列的三维数字成像系统实验平台,利用此算法对实验中获得的骰子基元图像阵列进行重构,成功地重构出原始物体的三维立体图像,在理论上和实验上证明了这种重构算法的有效性和可行性,并对实验中影响成像质量的因素进行了分析。
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The rats in control group were given distilled water, and the rats in experimental groups were given different doses of capsule(4.0、2.0、1.0g/kg), then enhance the capillary permeability of abdominal skin of rats by using xylic acid,and the OD numerical value was detected.
(1)抗炎实验:将40只小鼠随机分为补肾利浊胶囊高、中、低剂量组及对照组各10只,补肾利浊胶囊高、中、低剂量组分别给予相应剂量的补肾利浊胶囊(分别为4.0、2.0、1.0 g/kg),对照组给予蒸馏水,采用二甲苯酸致小鼠腹部皮肤毛细血管通透性增高,测定光密度值;(2)镇痛实验:40只小鼠分组及给药同抗炎实验,采用腹腔注射醋酸致小鼠出现扭体反应,纪录扭体次数并计算镇痛百分率;(3)抗前列腺炎实验:将雄性大鼠50只随机分为补肾利浊胶囊高、中、低剂量组及模型对照组及正常对照组,各10只。
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Methods ①anti-inflammatory trial: 40 rats were randomly divided into control group, high-dose bushenlizhuo capsule group, middle-dose bushenlizhuo capsule group and low-dose bushenlizhuo capsule group(10 rats in each group).the rats in control group were given distilled water, and the rats in experimental groups were given different doses of capsule(4.0、2.0、1.0g/kg), then enhance the capillary permeability of abdominal skin of rats by using xylic acid,and the od numerical value was detected.
(1)抗炎实验:将40只小鼠随机分为补肾利浊胶囊高、中、低剂量组及对照组各10只,补肾利浊胶囊高、中、低剂量组分别给予相应剂量的补肾利浊胶囊(分别为4.0、2.0、1.0 g/kg),对照组给予蒸馏水,采用二甲苯酸致小鼠腹部皮肤毛细血管通透性增高,测定光密度值;(2)镇痛实验:40只小鼠分组及给药同抗炎实验,采用腹腔注射醋酸致小鼠出现扭体反应,纪录扭体次数并计算镇痛百分率;(3)抗前列腺炎实验:将雄性大鼠50只随机分为补肾利浊胶囊高、中、低剂量组及模型对照组及正常对照组,各10只。
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To promote a test zoologic of course of this one foundation deepen and the system develops, highlight course characteristic, hold experimental animal to study horizontal forward position, decide definitely below the times setting that accords with existing course development, ask to fall in the consistent proposal of wide readership and author, in April 2006 classics country news publishs total arrange to approve, rise from January 2007 " experimental animal science and management " will formal more the name is " experimental animal science ".
为推动实验动物学这一基础学科的深化和系统发展,突出学科特征,把握实验动物探究水平前沿,在符合现有学科发展的时代背景下准确定位,在广大读者和作者的一致建议要求下,于2006年4月经国家新闻出版总署批准,自2007年1月起《实验动物科学和管理》将正式更名为《实验动物科学》。
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The anti-aging performance of the two paving asphalts was characterized with the changes of conventional and unconventional properties.
以两种国产道路沥青为研究对象,分别以薄膜烘箱实验和薄膜烘箱实验组合压力容器老化实验模拟沥青的短期老化与长期老化,以老化实验前后沥青的常规和非常规性质的变化表征抗老化性能。
- 推荐网络例句
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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.
随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。
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But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.
不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。
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Closes the eye, the deep breathing, all no longer are the dreams as if......
关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。