特征参数

The basic parameters of symmetric arcuate tooth trace cylindrical gear can be calculated according to the comparative cylindrical gear.

还详细分析了对称弧线圆柱齿轮特殊参数的设计计算方法，并进行了基于特征的参数化计算机辅助设计，通过实例设计计算，得出三维仿真模型。

At the same time, on the base of analysis of the present situation, the development trend and the leading edge technology, the necessity and feasibility about the exploitation of the full hydraulic bulldozer"s sate monitoring and fault diagnosis system is given; According to the structure, working feature and working environment, it works out system schema and system composition; The system is divided into display module, communication module and fault diagnosis module by means of block design, the implementation method and key parameter are also given; In light of the features of the full hydraulic bulldozer, the state monitoring and fault diagnosis platform composed of controller RC6-9 and display DI2/10 is designed based on CAN-Bus and the hardware design is completed; It lists the measured values and state of monitored parameters which should be real-time displayed in monitoring module as well as the data which will be transmitted; Furthermore, On the base of the study of, it gives 34 kinds of constant faults" diagnosis methods; Using BODAS software and DPS software, it compile the program code of the controller and the displayer; At last, this paper design and make the simulation test device of control system of construction machinery, through the experiment, the realizability, the categoricalness, the reliability, the stability and real-time are tested, in addition, the improved methods are given.

本文收集整理了国内外智能推土机研究的相关文献资料，综合分析了国内外智能推土机的研究现状、发展趋势和前沿技术，论证了开发全液压推土机智能系统的重要组成部分&全液压推土机状态监测与故障诊断系统&的必要性和可行性；根据全液压推土机的结构、作业特点和作业环境，制定了全液压推土机状态监测与故障诊断系统方案，确定了系统的结构组成；采用模块化设计方法，将整个系统分成了显示、通信和故障诊断三个模块，给出了各模块功能的实现方法，确定了各模块的关键技术参数：选用RC6-9和DI2／10作为系统的控制器和显示器，用CAN总线搭建了系统的通信平台，完成了系统的硬件设计；确定了系统监测参数和通信数据，对全液压推土机常见故障特征进行了分析，给出了34种常见故障的诊断方法；在BODAS软件和DPS软件的集成编程环境下，编写了控制器和显示器程序；设计并制作了工程机械控制系统模拟试验板，并在此基础上通过多次的程序调试与试验，对所设计的全液压推土机状态监测与故障诊断系统功能的可实现性、完备性、可靠性、稳定性和实时性进行了检验，证实了此系统的可行性，并提出了进一步的改进方案和措施。

Based on the conclusion above and the special features of the colluvial landslides, the load parameter and the unload parameter of this type of landslides are determined, so the ratio dynamic predication model of the load-unload response is established in term of the load-unload responses ratio theory.

在系统分析降雨和地下水作用动力因素与边坡位移及稳定性作用关系的基础上，针对堆积层滑坡基本特征，运用加卸载响应比理论，研究和确定了该类滑坡的加卸载参数及加卸载响应参数，从而首次建立了基于堆积层滑坡加卸载响应比的位移物理预测模型。

The results showed that both of Michaelis-Menten equation and Dagneli equation primely simulated response of photosynthesis rate to light intensity, and their effect was consilient. But the parameters of maximum photosynthesis, initial quantum efficiency and dark respiration by Michaelis-Menten equation was very distinctly bigger than them by Dagneli equation.

结果表明，两种方程均能很好地描述大豆和玉米叶片光合速率对光强的响应特征，两种方程的模拟效果是一致的，但两种方程得到的参数存在极显著差异，用Michaelis-Menten方程模拟得到的表观初始量子效率、表观最大光合速率、表观暗呼吸速率极显著大于用Dagneli方程得到的参数。

After analysis and study of characters of observational parameters of these extragalactic H2O megamaser sources, the correlations among them have been obtained as follows: lg S peak is anticorrelated with lg V sys and lg D , respectively.

通过对这些河外H2O超脉泽源的观测参数的特征的分析和研究，得到这些观测参数之间的相关关系为：河外H2O超脉泽源的峰值流量密度的对数分别与系统速度的对数和距离的对数之间存在着反相关关系。

This dissertation, based on (1) field investigations and observation along Jiangsu coastal environment (including: sea bottom and tidal flat sediment sampling, water depth, salinity, current velocity and direction, core drilling and so on);(2) integrative laboratory analyses of micropalaeontology, sedimentology and computer-processed mathematical statistics on over 300 samples and about 100 thousand foraminifera tests, try to find and formulize the relations between foraminiferal thanatocoenose and environment.

本文的写作基础是：通过野外进行的海岸环境调查和测量（主要调查项目有：水深、盐度，流速、流向、含沙量、底质采样、浅地层地震剖面仪探测、潮滩钻孔取样、潮滩探槽的挖掘与沉积物取样、观测等等）取得了环境参数和大量样品；在实验室运用微体古生物学、沉积学、数理统计与计算机分析相结合的方法，对所采集的现代表层沉积物和钻孔岩芯样品共计三百多个进行了分析研究，鉴定统计有孔虫标本十万余枚，研究有孔虫埋葬群特征与环境参数之间的定性-定量关系。

The method we used in porosity and fractural parameters calculation has coincide well with practice.

系统分析研究区及其邻区火山岩测井响应特征，首次提出了基于交会图和多元统计方法的神经网络岩性识别技术，在解决复杂岩性地层的岩性识别中取得了很好的效果，提高了井孔岩性剖面解释精度，岩性解释符合率大于80％；运用多种参数评价火山岩裂缝—孔隙性储层，提出的计算孔隙度和裂缝参数的方法在实际应用中取得较好的效果。

This method consists of two steps: first, the image is divided into numbers of nonoverlapping blocks and the GMRF parameters are computed for each of these blocks, then a clustering method is used to merge these blocks, a coarse segmentation and texture types of the image are obtained. Second, a deterministic relaxation neural network is constructed, the parameters of the model estimated from the first step are used as input data, through neural network computation, a fine segmentation is obtained.

提出一种基于高斯-马尔可夫随机场和神经网络的无监督纹理分割方法，方法分为两步：第一步先将图像分为不重叠的小块，在小块中计算GMRF参数，并将此参数和该块的均值、方差作为该块的特征向量，然后进行聚类，得到原图像的一个初始分割和图像中所包含的类别数；第二步构造一个决定性松弛的神经网络，将第一步得到的结果作为初始输入，经过神经网络计算，得到一个精确的分割结果。

In this paper the structure of normal skin and the pathological character of PWS skin was analyzed in detail and the true structure were simplified into a hybrid layered mathematical model to character two most important aspects of PWS skin: layered structure and overabundant dermal vessels.

基于人体皮肤的组织结构、鲜红斑痣的病理特征、光在皮肤组织中的传输特性以及皮肤各层的组织光学参数，建立了一种具有多层组织结构的鲜红斑痣皮肤光学模型，介绍了该模型中组织光学参数的确定方法。

Firstly, the high resolution pictures of dragonfly wings from sample tests were studied thoroughly, and the unique feature of the reticulate vein distribution and the variation of the vein sizes and the grid shapes in different zones were figured out;then several computational models based on a dragonfly wing were established by using ANSYS, and beam 189 and shell 93 elements were used respectively in modeling of the veins and the membrane so as to ensure the compatibility between the veins and the membrane at a deformed state;these models subject to uniform loading cases were analyzed respectively so as to explore the unique performances of the wing structure, furthermore, through eigenvalue spectrum analyses of these models, the special role of the pterostigma in eliminating or suppressing the wing quivering effect was also evaluated.

首先，对实验中获取的高清晰度的蜻蜓翅膀数码图片进行了细致地分析，找出了翅膀网状翅脉结构中翅脉的分布规律与尺寸变化、网格形状的差异及不同形状网格的分布等独特的结构特征；再利用ANSYS建立蜻蜒翅膀网状翅脉结构模型，采用三节点等参数梁元beam189模拟翅脉和八节点等参数曲壳单元shell93模拟翅膜，以满足翅脉和翅膜间的变形协调性要求；通过非线性数值分析，探索了蜻蜓翅膀网状翅脉结构在均布荷载作用下所具有的独特的结构性能；通过模态分析，揭示了翅膀前缘靠近翼尖附近的翅痣在翅膀消震减振中所发挥的作用。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。