结构上
- 与 结构上 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Because the olefinic hydroxyl groups are linked with olefinic carbon, so it can ionize H〓 ion and present the properties of weak acid, and so the olefinic hydroxyl groups change into the structure of alcoholate in the presence of alkali , but the structure of alcoholate may change into the structure of olefine alcohol again, after the Na〓 ions is removed, or when the pH value of its solution turn into pH. Because the structure of the olefine alcohol is not stable and is easy to isomerizate to become the structure of olefine ketone, so there appear the ca. 1730cm〓 C=O absorption peak in the IR spectra of the products.
明确指出了在C〓、C〓富勒醇中存在烯碳羟基与叔碳羟基等二类羟基,烯碳羟基由于与一个共轭体系相连,从而其羟基可以离解而呈现出弱酸的性质,因而在碱性条件下易形成烯醇钠盐的结构,当除去钠离子后或在酸性溶液中,烯醇钠盐结构转变为烯醇结构,但由于烯醇结构不如烯酮结构稳定,从而形成烯醇结构后,烯醇结构异构化为烯酮结构,因此在其产物的IR谱图上出现1730cm〓附近的C=0吸收信号。
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According to the studied results at present, the studied objects are mainly thin plate and beam about sound radiation mode, a method computed sound radiation mode of complex structure is presented in this dissertation, according to the results of the previous two chapter, a theoretical method to solve acoustical radiation mode and acoustical radiation efficiency of complex structure by boundary element method and acoustical radiation theory is posed, the acoustical radiation power is expressed as a Hermitian quadratic form, while the radiation modes is determined by general eigenvalue decomposing, and then the radiation efficiency is computed via the orthodoxy of radiation modes with regard to impedance matrix and average velocity matrix; lastly, the validity of the method is proved by pulsating sphere and radiating cube with analytical results. According to results of the form three chapter, the structure sound radiation sensitivity is studied in detail, the sound radiation power of structure can be expressed as positive Hermitian quadratic form, the sound radiation sensitivity can be expressed as two parts by partial differential with respect to design variable, which are sensitivity of boundary velocity and impedance matrix, combined with the theory of FEM and BEM, the structure sound radiation can be translated to the analysis of structure dynamic sensitivity and impedance matrix sensitivity. The theory posted in this dissertation is tested by the FEM software ANSYS and the software AAS programmed by author.
在前几章的基础上,通过结构声辐射的模态理论对结构的声辐射的机理进行了深入地探讨,针对目前声辐射模态的研究对象主要是简单的板和梁类结构,提出了一种计算复杂结构声辐射模态的方法,利用前两章研究所得的结论,将边界元方法与广义特征值的理论结合起来研究了复杂结构的声辐射模态与声辐射效率,先将结构的声辐射功率表示为一个正定的厄米特二(来源:ABb7C论文0909网www.abclunwen.com)次型,运用广义特征值分解求解了复杂结构的声辐射模态,然后利用声辐射模态关于阻抗矩阵与均方速度耦合矩阵的正交性,求解了复杂结构的声辐射效率,最后用具有解析解的脉动球与辐射立方体验证了该方法的有效性。
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By introducing the two dimensional homogeneous coordinates of an infinite point on Euclidian plane,the point coordinates and linear coordinates of an infinite point in straight lines,some theorems and conclusions referred to infinite points are applied in the classifications of structures in this paper.
引入了欧氏平面上无限远点的二维齐次坐标和直线上无限远点的点坐标及线坐标,引用了与无限远点有关的一些定理及结论于结构的分类中。从而给出了可变体系中的常变与瞬变在结构形式上的区别,完善了杆系平面结构几何组成规则的内容
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Then the MEMS solenoid type electromagnetic actuating and novel, frictionless and wear-free, and simple structure are designed for fiber-deflecting type MEMS VOA: One of the two coupled single mode fibers is completely fastened in one of the three aligned U-shaped grooves while the deflectable fiber is partially fixed in another groove with a long front section suspending over the wider groove as a cantilever beam. The two fibers, any one for input and the other for output, are well aligned initially so that the insertion loss is very low. Beside the deflectable fiber is a solenoid microactuator with a U-shaped permalloy core attracting a permalloy piece glued on side of the fiber cantilever so that the fiber is deflected and the optical power coupled between the fibers decreased continuously. Using MEMS solenoid as a continuous actuator and the novel structure of VOA are not seen in literature.
为光纤偏移型MEMS可变光衰减器设计了MEMS螺线管电磁驱动方式以及新颖的避免了静摩擦、磨损而且简单的整体结构形式:在硅基片的三段V形槽结构中,将两个对接单模光纤之一完全固定在基片上,只将另一根光纤的稍后部位固定于基片上而使其前端的一定长度悬空,形成一个悬臂梁结构;初始对准后两根光纤之间的光传输损耗很小;通过U型铁芯MEMS螺线管吸引固定于光纤悬臂梁上的坡莫合金片,驱动光纤悬臂梁连续偏移以使两根光纤之间功率传输系数连续变化,从而达到光功率连续衰减的目的。
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The word-to-sound rule and the structure of a speech database are modified during the implementation of TTS system, and then a filter algorithm based on part-of-speech is proposed to solve the polyphone problem. Prosodic research on Chinese characters plays a great role in speech recognition and speech synthesis system. In order to improve the naturalness of a speech synthesis system, the relationship among the sentence structure, the length of a sentence and the breath boundaries is analyzed and a breath boundary assigning algorithm based on such relationship is put forward. In addition, the author analyzes the process of a speech synthesis system and builds a prosodic markup language suitable for Chinese speech synthesis.
呼吸群边界划分作为汉语韵律的一种表现方式,它在语音感知和文语转换系统的性能方面起着十分重要的作用,作者在对汉语句法结构、句子长度和和呼吸群划分之间关系的研究基础上,设计并实现了基于句子长度和句法结构的呼吸群边界划分算法;为更好地描述文语转换过程,作者提出了适合汉语语音合成的SSML韵律标注语言,该标注语言不仅从声学层上对语音的韵律进行描述,而且从语言学层上标注句法结构信息,最后本文对基于语言理解的韵律规则用SSML进行了描述并用实验验证了语言学层面的标注对系统自然度的影响。
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Based on functional structure cell library, using self-organizing assembly technology gets the functional model in order to accomplish conceptual design. Based on genetic modelon library, using variant design gets technical model in order to accomplish detail design. The design can make the CAD system joined with devisers' thought get entity model, achieve intelligent and automatic design.
在功能结构单元库基础上,运用自组织配合技术完成功能模型的生成,实现零件结构的概念设计;在基因单元图形模板的基础上,运用变型设计和二次开发技术完成功能模型的工艺结构细节设计,实现零件结构的详细设计,使CAD系统能从概念设计师的角度出发,与设计思维很好融合,快速生成零件实体模型,从而实现产品的智能化、自动化设计。
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Its rule of change was obtained. On the basis of other studies, the flocculation kinetics and flocs structure was studied. By making some assumptions, collision frequency were presented. Then the the flocculation kinetics model was established through population balance equation. Comparison of experimental data and modeling results indicate that there are the same trend between the two. So the model can predict flocs number and size during flocculation of Yellow River's loess particles without using empirical parameters. The TEM and SEM were used to obsever flocs in the study of floc structure. The flocculation was divided as flocculi, floc and floc aggregate. The flocs structure model was established by assumption that particles position in floc accords with tetrahedron. The fractal dimension of model and experimental flocs was found to be coincident. So the model can reflect the structure of flocs formed in flocculation of Yellow River's loess particles by macromolecule flocculant at a certain extent.
最后,本文还对絮凝动力学和絮体结构进行了研究,在前人研究的基础上,针对高分子絮凝黄河泥沙,对絮凝过程作了一些符合试验条件的假设,建立了颗粒碰撞频率表达式,应用了颗粒数量平衡方程,从而建立了絮凝过程的动力学生长模型,模型计算结果与试验数据对比表明,二者趋势一致,在没有使用经验参数的情况下基本上能够描述黄河泥沙絮凝过程中絮体数量和尺寸分布的变化过程;对絮体结构的研究中,应用扫描电子显微镜和透射电子显微镜对絮体进行了观察,将絮体分为絮粒、絮团和絮网三个不同的生长阶段,通过假设颗粒结合位置符合正四面体,建立了絮体结构模型,计算得到的模型絮体分形维数基本与试验中的实际絮体相符,在一定程度上能眵反映高分子絮凝黄河泥沙生成的絮体结构。
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Its rule of change was obtained.On the basis of other studies,the flocculation kinetics and floes structure was studied. By making some assumptions, collision frequency were presented.Then the the flocculation kinetics model was established through population balance equation. Comparison of experimental data and modeling results indicate that there are the same trend between the two. So the model can predict floes number and size during flocculation of Yellow River's loess particles without using empirical parameters.The TEM and SEM were used to obsever floes in the study of floe structure.The flocculation was divided as flocculi,floc and floe aggregate.The floes structure model was established by assumption that particles position in floe accords with tetrahedron.The fractal dimension of model and experimental floes was found to be coincidentSo the model can reflect the structure of flocs formed in flocculation of Yellow River's loess particles by macromolecule flocculant at a certain extent
最后,本文还对絮凝动力学和絮体结构进行了研究,在前人研究的基础上,针对高分子絮凝黄河泥沙,对絮凝过程作了一些符合试验条件的假设,建立了颗粒碰撞频率表达式,应用了颗粒数量平衡方程,从而建立了絮凝过程的动力学生长模型,模型计算结果与试验数据对比表明,二者趋势一致,在没有使用经验参数的情况下基本上能够描述黄河泥沙絮凝过程中絮体数量和尺寸分布的变化过程;对絮体结构的研究中,应用扫描电子显微镜和透射电子显微镜对絮体进行了观察,将絮体分为絮粒、絮团和絮网三个不同的生长阶段,通过假设颗粒结合位置符西安建筑科技大学博士学位论文合正四面体,建立了絮体结构模型,计算得到的模型絮体分形维数基本与试验中的实际絮体相符,在一定程度上能够反映高分子絮凝黄河泥沙生成的絮体结构。
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The age class structure of Salix oritrepha population in alpine, cloudy and wet area of east Qilian Mountian is studied ,on two levels of genets and their ramets and sprouting branches .The results show that genets population is very short of the first and second class seedlings,and most of seedlings belong to the third and forth classes, and the development trend of population on this level is stable;on the other hand,the age structure of remets and sprouting branches population is more complete,and its age class distribution chart likes triangle, belonging to increasing type.In general,Salix oritrepha population in this area is increasing, but its reproduct way have changed in community succession process in order to accommodate varying circumstances.
从无性基株个体种群和无性克隆分株及萌生枝种群两个层次上对东祁连山高寒阴湿地区山生柳种群年龄结构进行分析,结果表明:无性基株个体种群 0~10 龄级幼苗贮备严重不足,11~20 龄级苗木所占比重最大,种群动态呈稳定型;无性克隆分株和萌生枝种群年龄结构比较完整,结构分布图呈正三角形,种群动态表现为增长型;总体上来讲山生柳种群呈增长趋势,只是在演替过程中为适应环境其繁殖方式有所改变,导致现阶段山生柳种群两个层次结构状态。
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This dissertation aims at finding anticancer and antibacterial polynuclear complexes targeting DNA with high activity and low toxicity. Sixteen compounds were synthesized, and characterized by means of X-ray single crystal diffraction, elemental analysis, molar conductivity and IR, and the influencing factors on structures of the compounds have been investigated. The actions of these compounds to DNA were also investigated by spectral, electrochemical and hydromechanical methods.
本论文以DNA为靶点,以寻找新结构类型的高效、低毒的抗癌、抗菌多核配合物为目标,从分子设计出发,共合成得到了16个化合物的单晶结构,对其进行了结构表征,探讨了结构影响因素,并研究了其超分子结构;采用紫外-可见吸收光谱法、荧光光谱法、电化学和粘度法,从分子水平上研究了所得配合物与DNA的相互作用;在细胞水平上,研究了草酰胺桥联双核配合物的抗菌和抗肿瘤活性。
- 推荐网络例句
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Fancy gold-plated dangling earrings with facetted White Opal crystals.
花式镀金悬垂耳环与facetted白欧泊水晶。
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This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.
本文选取石家庄市初中生物教师作为研究对象,运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查,调查结果发现,石家庄市初中生物教师这一群体普遍存在职业倦怠,情感枯竭程度偏高,成就感偏低,去个性化程度最为严重。
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In measurements of a day,generallyspeaking,the photosynthesis of birch in mesophytic habitat is better than that in xerophytichabitat(peak values are 12.8,10.33μmolCO2m-2s-1 respectively);that of sexual birch inmesophytic habitat is better than that of clone birch(peak values are 9.87,6.71μmolCO2m-2s-1respectively);that of young tree is better than that of seedling(peak values are12.37,10.05μmolCO2m-2s-1 respectively).
在一天中的各个时刻,总体说来,中生生境生长的白桦光合作用超过旱生生境生长的白桦光合作用(净光合速率峰值分别为12.8、10.33μmolCO2m-2s-1);白桦幼树的光合作用超过白桦幼苗(净光合速率峰值分别为12.37、10.05μmolCO2m-2s-1);中生生境有性白桦的光合作用超过无性白桦的光合作用(净光合速率峰值分别为9.87μmolCO2m-2s-1、6.71μmolCO2m-2s-1)。