查询词典 based

The creative point of this dissertation consists firstly in that monochromatic stimuli instead of combined spectral power distribution were used as visual object, and spectral luminous efficacy curves were drawn from the performance-based method; Comparison between performance-based method and brightness-matching method was then done and therefore connection between these two methods was developed; One more creative point is that the analysis based on the theory of neurophysiology and psychophysics leads to the conclusion that contribution of the colour channel during visual information processing is reflected from performance-based method, which should be considered when CIE develops the new mesopic photometry system.

论文的新颖之处在于实验中使用了单色光谱代替复合谱或物体色作为视觉目标，在分析中间视觉状态下视觉功能的光谱响应特性的基础上反推了人眼的光谱光视效率函数；论文更进一步验证了基于视觉功能法和传统的视亮度匹配法之间的联系，在两种方法之间构造了一座桥梁，为基于视觉功能法的使用初步建立了理论依据；同时论文创新地采用心理物理学的方法进行实验和结合物理学和视神经生理学的知识对实验结果进行分析，从而从视觉信息处理的神经机制层面证明了基于视觉功能法获得的结果包含了视觉颜色通道效应，并对CIE在建立新的中间视觉光度学系统时要充分考虑这一视觉颜色通道的影响提出了建议。

Under torch brazing condition, using brazing filler metals of Cu-based and Ag-based, a series of tests are investigated to braze Ti based cermets and 45 steel, the micrographic structure of joints and shearing test results are analyzed, they show that Ti based cermets has good brazability.

通过观察和分析钎焊接头的结合情况及剪切试验，表明 Ti基金属陶瓷具有较好的钎焊性；火焰钎焊条件下，以 H 6 2为钎料的接头的平均剪切强度为37MPa，以 BAg10 Cu Zn为钎料的接头的剪切强度达 114 MPa，以 BCu Zn Mn为钎料的接头的平均剪切强度为 4 9MP

Methods 160 reverse flow axial flaps were used to repair the defects of eyelid, nose,chin,lip,neck,vagina,and penis,including retroauricular flap based on superficial temporal artery,auricular composite flap based on supraorbital vessels,neck-submandibular flaps based on contralateral side mental artery,nape-scapulo-dorsal flap based on transverse cervical artery,and medial ...

方法随机选择160例近22年来应用较广的5种动脉跨区供血反流轴型皮瓣，即：颞浅血管为蒂的乳突区皮瓣、眶上血管为蒂的岛状耳廓复合组织瓣、颏下动脉蒂的对侧颏颈皮瓣、颈横动脉供血的项肩背皮瓣、会阴动脉供血的股内侧皮瓣，考查其完全成活率、部分成活率、完全坏死率、动脉缺血发生率、动脉缺血致皮瓣坏死率、静脉淤血发生率、静脉淤血致皮瓣坏死率等指标，并与我院同期内应用的常规顺流轴型皮瓣随机样本120例进行比较。

L Based on the analysis on the current NC programming systems, an interactive NC programming system is studied: First, due to the over sophisticated calculation of cross and tangent points in NC programming, a knowledge based math processor is proposed, then, to provide more convenint graph entry method, a dynamic figure based graph entry system is devised, at last, based on the above mentioned studies, an integrated (including preprocessor, post processor and program testor), interactive, bi-dimensional NC programming system is developed.

围绕语音数控自动编程系统研究：(1)首先，在分析现有编程系统基础上，研究了交互式数控自动编程系统：针对自动编程系统交切计算复杂的特点，提出并实现了基于知识的数学处理子系统；为了方便图形输入，构造了动态表格图形输入子系统。

In this paper, the first identity-based proxy signature scheme without random oracles is proposed based on Paterson, et al's identity-based signature scheme. The unforgeability of the proposed scheme is based on the hardness of the well known computational Diffie-Hellman problem.

利用Paterson等的基于身份的签名方案构造了一个基于身份的代理签名方案，并在标准模型下基于计算Diffie-Hellman假设证明了它的安全性。

This research was untaken by observing the construction of the school-based teaching research system, the school-based teaching research guided by tasks, the teaching research based on reading, the school-based teaching research of exploring teaching. All tasks carried out in this research reflect the original form of teachers\' professional development under the background of new curriculum reform.

本研究考察了校本教研制度的建立；课题导引的校本研修活动；以读书为载体的校本研修；关于探究性课程的校本研修；学校里的研究课等内容，反映了新课程背景下教师集体专业成长的原生形态。

The main results in this paper as follows: First, a prototype of a shape-based image database retrieval system is completed, it can receive the query mode both by giving an example image and by sketching the desired object on the screen, Second, five shape-based image retrieval methods are realized; Third, an algorithm based on triangulation for shape-based image retrieval is brought forward. In this algorithm, firstly, the edge of the original image is followed and the candidate corners in the original image are detected. Then the counterpoints of the candidate corners in the result of edge follow are found, and the boundary corners whose counterpoints have been found are queued in the order of their counterpoints in edge follow. After these steps, the boundary corners are triangulated and triangles are obtained which can show the true shape of the original image. Finally, shape feature is obtained by calculating the angle histogram of the triangles.

同时本文中主要完成了以下三方面的工作：完成了一个基于形状特征的图象检索的原型系统，可实现例子图象或徒手绘草图两种查询方式；实现了五种利用形状特征进行图象检索的具体方法，并对其进行了分析比较；并且在继承将三角剖分引入形状检索的思想基础上提出了利用三角剖分进行形状检索的一种新算法：先对原图象进行边界跟踪和角点检测；然后寻找初始角点在边界跟踪中的对应点，并对找到对应点的角点按其对应点在边界跟踪中的顺序进行排序；再对排序后的角点进行德洛内三角剖分，得到能表示目标真实形状的三角形序列；最后计算三角形序列的角度直方图作为形状特征，并进行相似性匹配。

The method includes following steps:(1) initial frequency selection;(2) based on modulation mode adopted, the sending end carries out symbol mapping, changes signal spectrum based on label information of sub channel, and sends signal in time domain;(3) based on label information of sub channel, the receiving end carries out equalization for received signal, demodulates signal and accomplishes judgment;(4) carrying out channel estimation or prediction, the receiving end obtains updated information of signal state, and determines whether label information of sub channel is needed to update based on self-adapting judgment rule.

本发明提供了一种移动宽带信道中的自适应选频分块传输方法，该方法包括以下步骤：(1)初始选频；(2)发端根据所采用的调制方式进行符号映射，根据子信道标记信息改变信号频谱，并发送时域信号；(3)收端根据子信道标记信息对接收信号进行均衡，解调信号并完成判决；(4)收端进行信道估计或预测得到更新的信道状态信息，根据自适应判断规则，判断是否需要更新子信道标记信息。

The first chapter of the paper mainly states the research of HPM source and HPM appliance based on the transit-time effect,the second chapter introduces a variety of HPM source in investgating course,capability,fabric,research condition,developing tendency aspects and so on,the third chapter descants HPM source based on the axial transit-time effect , the radial transit-time effect and the low diode impedance HPM source based on the axial transit-time effect,the forth chapter includes a conclusion of HPM source and HPM appliance based on the transit-time effect,and gives a assumption of the work in the future.

本文第一章主要简述了高功率微波源和基于渡越时间效应的器件的研究情况，第二章从研发过程、性能参数、结构特点、研究现状、发展趋势等方面系统介绍了各种高功率微波源。第三章则从各个方面详尽介绍了基于轴向渡越时间效应、基于径向渡越时间效应的器件以及低阻抗的轴向渡越时间振荡器，第四章则对高功率微波源和基于渡越时间效应的器件的发展做出了结论，并对以后的工作提出了构想。

There are four parts in this thesis: the first mainly describes what in-service teacher education has changed in information age and the relationship between constructivism and web-based in-service teacher education; the second and the third are the main part of this thesis, mainly analyzing scaffolded instruction theory, and constructing a web-based scaffold theory model and its implementation model based these analyses, then discussing some problems those should be noticed in the development of web-based course; the fourth discusses a practical study for how to apply the model into practice.

论文分成四大部分：第一部分主要论述了在信息时代教师继续教育的变化以及建构主义理论与网络化教师继续教育的关系；第二部分和第三部分是论文的主体部分，主要针对支架式教学进行理论分析，并在分析的基础上建构了基于网络的支架模型及其实施模型，然后以此模型为指导论述了网络课程开发应注意的一些问题；然后在第四部分以前面的分析为基础进行了一个实例研究，以进一步探讨此模型的实际可行性。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。