查询词典 for the first time

In chapter 5, in allusion to the shortcoming of the existing high resolution radar target detection algorithm, taking the problem of high resolution radar target detection as the problem of true-false target recognition, and borrowing ideas from the dealing with novelty problem, this paper introduces one-class SVM into high resolution radar true-false target recognition for the first time. That can provide a new idea for solving high resolution radar true-false target recognition problem.

第五章针对现有的高分辨雷达目标检测算法的缺陷，将高分辨雷达目标检测问题等效为真假目标识别问题，并借鉴处理异常值问题的思想，首次将1类支持向量机引入高分辨雷达真假目标识别之中，为解决高分辨雷达真假目标识别问题提供了一条崭新的思路。

It is clarified for the first time that the thermal fatigue failure of solder joint is actually a creep strain low cycle fatigue failure, and a physical model for creep fatigue crack propagation has been proposed. It was pointed out that creep strain increases in the high stress area ahead of the tip of thermal fatigue crack, results on one hand that the slide of crack tip increase, inactivation more serious and crack close length increases, the other hand, that intergranular crack exists, whose direction will affect the fatigue crack propagating.

本文首次阐明了焊点的热循环失效本质上是以焊点内循环蠕变为主要应变的低周疲劳失效，并在此基础上提出了蠕变疲劳裂纹扩展的物理模型，指出热循环裂纹前端的高应力区内，蠕变加剧，使裂纹前端滑移增加，裂纹钝化加剧，导致随后的裂纹闭合扩展长度增加；同时蠕变也使裂纹前端的高应力区出现晶间裂纹，蠕变沿晶裂纹对主裂纹扩展的影响取决于沿晶裂纹的连接方向。

By using Fourier Optics a theoretical model based on single-pass compression is set up for the study of the pulse-front distortion. For the first time the effects of the pulse-front distortion on the spatial-temporal properties of the output pulse from the compressors.

利用傅立叶光学方法，建立了一个基于单程压缩构型的研究脉冲前沿畸变效应的理论模型，首次分析不同种脉冲前沿畸变效应对于压缩器输出脉冲的近场时空特性的影响。

Anna for the first time chemotherapy, vomiting, Taylor Enron beat her, to her chewing gum, silk do not mind his girlfriend has a lot of falling hair; their participation in organized ball for patients - even when Taylor with embarrassing talking about "It's like is the same as the school's dance ", the really hard to hold back the tears - Taylor, wearing a suit and waiting, like a nervous groom, a hair fall out because of chemotherapy, Anna, wearing a wig, gorgeous dress, slowly walking down the stairs; they run hand in hand, in the wards making love - no plot not but burst into tears.

安娜第一次化疗呕吐，泰勒安然的拍打她，给她口香糖，丝毫不介意女友已经大把掉落的头发；他们参加为病人举办的舞会——当泰勒甚至还带着难为情的说起&就像是学校里的舞会一样&时，真的很难忍住眼泪——泰勒穿着西装等待，紧张不安的像是新郎，因为化疗掉光了头发的安娜，戴着假发，华丽的礼服，缓缓从楼梯上走下来；他们手拉手奔跑，在病房里做爱——没有哪个情节不让人泪流满面。

Anna for the first time chemotherapy, vomiting, Taylor Enron beat her, to her chewing gum, silk do not mind his girlfriend has a lot of falling hair; their participation in organized ball for patients - even when Taylor with embarrassing talking about "It's like is the same as the school's dance ", the really hard to hold back the tears - Taylor, wearing a suit and waiting, like a nervous groom, a hair fall out because of chemotherapy, Anna, wearing a wig, gorgeous dress, slowly walking down the stairs; they run hand in hand, in the wards making love - no plot not but burst into tears.

安娜第一次化疗呕吐，泰勒安然的拍打她，给她口香糖，丝毫不介意女朋友已经大把掉落的头发；他们参加为病人举办的舞会——当泰勒甚至还带着难为情的说起&就像是学校里的舞会一样&时，真的非常难忍住眼泪——泰勒穿着西装等候，紧张不安的像是新郎，因为化疗掉光了头发的安娜，戴着假发，华丽的礼服，缓缓从楼梯上走下来；他们手拉手奔跑，在病房里ML——没有哪一个情节不让人泪流满面。

As a special micro-power source, thermoelectric micro-generator is of interest for its applications in Micro-Electro-Mechanical Systems. Electrochemical deposition method took the advantage at the fabrication of thermoelectric material in micrometer scale. In this paper, the detailed reduction processes of Bi~(3+) and HTeO~(2+) were studied for the first time. And thermoelectric nanowires were also prepared by electrochemical deposition. On the basic study of thermoelectric material, detailed exploration was made to the design and fabrication process of thermoelectric micro-generator.

作为一种特殊的微动力能源，微型温差发电器在微机电系统中的应用前景引起了人们极大的兴趣，电化学沉积方法在制备微米级尺寸的温差电材料方面具有显著的优势，本文对Bi~(3+)和HTeO~(2+)离子的电化学还原过程展开了详细的研究，并尝试了利用电化学沉积方法制备Bi_2Te_3纳米线材料，在温差电材料研究的基础上，对微型温差发电器的结构设计和制造过程进行了详细的探讨。

In addition, the blank holding force that is required to avoid wrinkle and rupture during conical part deep drawing is researched. The necessity of reasonable blank holding force in pressing is expounded. From the view of mechanical analysis, the wrinkle critical condition of side-wall is derived for the first time by the stress state of side-wall, the main deformation region on blank. According to the critical condition of plastic instability for flange, side--wall, corner of punch on blank, The blank holding force in conical part deep drawing is divided into four different regions within its forming figure. The basic principle of reasonable blank holding force during stamping is summarized and provided. The mathematical model of reasonable blank holding force that avoids the wrinkle and rupture is established and verified by the finite element numerical simulation and the grid experiment method. The result shows that it is accurate and reliable.

此外，本文还研究了圆锥形件拉深成形过程中，随着拉深变形过程的进行，毛坯为避免产生起皱、破坏缺陷而对压边力的需求情况，阐明了圆锥形件拉深成形过程中压边力合理变化的必要性；由毛坯主要变形区悬空锥壁部分的受力变形情况，从力学分析的角度，首次推导得出了圆锥形零件悬空锥壁起皱失稳的临界条件；并根据主要变形区法兰、悬空锥壁及凸模圆角部分的塑性失稳临界条件，在其成形范围图中，将圆锥形件成形过程中的压边力划分为四个区域；总结并提出了圆锥形件成形过程中压边力合理变化的基本原则；建立了防止起皱、破坏缺陷产生的压边力合理变化的数学模式，并得到了有限元数值模拟及网格实验法的验证，证实了理论分析结果的正确性和可靠性。

The subject under discussion is studied for the basic point of departure with a kind of calligraphy document on the basis of putting a large amount of calligraphy preface and postscripts in order all- sidedly, Through own value of preface and postscript to the calligraphy being overall and cognitive and understands, regard classifying as the basic research approach, Study all-sidedly about calligraphy preface and postscript and calligraphy in Song dynasty for the first time.

本题在对大量书法题跋进行全面整理的基础上，以一类书法文献研究为基本出发点，通过对书法题跋本身价值的全面认知与解读，以分类为基本研究方法，首次对宋代书法题跋与书法加以全面研究。

In the paper, Professor Zhao's historical course engaged in coral reef study and academic results are reviewed: he established the representative section for geological research on Quaternary coral reef, developed engineering geology research on coral reef, elaborated systematically landform development rules of coral reef in the South China Sea, uncovered certain paleo-oceanographical conditions and the new tectonic movement features, studied the historical climate recorded by lagoon of coral reef in the South China Sea and marine geography of coral reef for the first time, investigated comprehensively the only fringing reef of the seacoast of South China continent on western shore of Xuwen County, summarized initially the history of modern coral reef research in China.

文中回顾其从事珊瑚礁研究的历程，并评述其珊瑚礁研究的学术成果：建立了我国第四纪珊瑚礁地质研究的典型剖面；开拓了我国珊瑚礁工程地质研究；系统论述了南海珊瑚礁地貌发展规律，揭示了某些古海洋学状况和新构造运动性质；首次研究了南海珊瑚礁潟湖沉积记录的历史气候；首次进行了我国珊瑚礁区综合海洋地理学研究；较全面开展华南大陆沿岸唯一岸礁徐闻西岸珊瑚礁调查研究；初步总结了我国现代珊瑚礁研究史。

The following main results are obtained: The TiO_2 photocatalyst with small crystallite size, high surface area, narrow and uniform pore size distribution, and microporous frameworks could be prepared out by applying MW radiation in the preparation process. The microwave-induced fluorescence technique verified for the first time that microwave enhanced the formation rate of hydroxyl radical, leading to the increase in the photocatalytic efficiency. Compared with the conventional catalyst, TiO_2 prepared by MW dielectric heating owns a higher UV absorption ability, and its optical absorption edge and photovoltaic response are shifted toward the short wavelength region, resulting in increase of photooxidation efficiency. The photocatalytic conversion and the mineralization ratio of acetaldehyde are increased respectively by 30% and 40% over the TiO2 prepared by MW radiation when compared to the TiO2 prepared by the conventional heating. For the MW-assisted photocatalytic reaction over the MW-prepared TiO2, production of hydroxyl radicals is enhanced by 22.5%, and the photocatalytic conversion is accordingly increased by 20%. Similarlly, applying MW also increased the photocatalytic conversion and the mineralization ratio of acetaldehyde over TiO2/Al2O3 sample.

论文得到如下主要结果和结论：(1)微波介电加热TiO_2 溶胶可得到晶粒度小、光催化活性高、比表面积大和孔径分布窄而均一，且微孔发达的TiO_2光催化剂；在溶胶干燥处理过程中微波可使催化剂表面缺陷增加，进而导致光催化反应过程有更多的活性羟基自由基产生；(2)微波制备能显著增强TiO_2 样品的紫外光吸收率，并使其光吸收和光伏响应阈值发生蓝移，从而提高TiO_2的氧化还原能力；(3)与常规加热法所制TiO_2比较，微波法制备的TiO_2对乙醛的光催化降解转化率提高30%，CO_2生成率提高40%以上；(4)与未加微波辐射时相比，发现在光催化反应过程中施加微波，TiO_2 的羟基自由基生成速率提高了22.5%，相应CH_3CHO 光催化降解转化率提高了20%；对Al_2O_3/TiO_2催化剂，CH_3CHO 光催化降解转化率甚至提高了33%，同时CO_2 的生成率也都大幅度提高；(5)微波辐射可改变光催化降解乙醛的产物分布，推断施加微波时乙醛光催化降解按照羟基自由基引发的链式反应机理进行，微波&非热效应&起主要作用。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。