数学基础

OBJECTIVE: To establish a three-dimensional finite element model of a mandibular molar with dental implant inserted in mandibular molar area using reverse engineering, and to provide mathematical model basis for biomechanics researches of stomatology.

目的：利用逆向工程快速建立含下颌磨牙种植义齿的颌骨三维有限元模型，为口腔生物力学的研究提供数学模型基础。

On the basis of Equivalent Heat Drop Theory of changeful heat quantity, a mathematical description that heating value enters or leaves thermodynamic system by absolute magnitude has been deduced.

在变热量等效热降法理论的基础上，推导出热质进出热力系统的数学描述———纯热量法。

The students in a topology course should have some knowledge of mathematical analysis and abstract algebra.

拓扑学要求学生具备一些数学分析和抽象代数的基础。

For there is no concrete mathematical expression to describe its complicate inner working process and theoretical calculation, and the movement of piston is a kind of nonlinear variable accelerated motion, we have to resort to computer technique to do theoretical research work.

油压夯管锤是高能量输出的油压马达，其工作性质是建立在流体力学、液压传动、运动学、动力学、机械学、波动力学等多学科基础上的流体机械，其内部工作过程和理论计算比较复杂，没有显示的数学表达式，而活塞的运动又是一种非线性的变加速的运动过程，因而，其理论研究必须借助电子计算机。

Based on indoor measurement of rock acoustic velocity,drillability, rigidity ,uniaxial compressive strength,the relationship between acoustic velocity and fragmentation parameters of rocks and that between the surface acoustic velocity and the underground mine logging acoustic velocity were explored by regression analysis.

在室内测定岩石声波速度、可钻性、硬度、单轴抗压强度试验的基础上，利用回归分析方法，探索声波速度与岩石机械破碎性能参数之间、地面声波速度与井下测井声波速度之间相关关系，建立了利用测井声波速度预测地层岩石机械破碎性能参数的数学模型，介绍了预测剖面及资料验证结果，并将这一方法用于计算PDC钻头可钻性以及中国南方海相碳酸盐岩地层的岩石力学参数。

The relationships between welding pool width, wire extension and welding parameters including welding current duty ratio, base current, peak current, welding speed and wire-feeding speed were studied. Through large numbers of welding experiments, aluminum alloy pulsed MIG welding dynamic process were identified by the curve fitting method, and the mathematical models between welding current duty ratio, base current, welding speed, wire-feeding speed and wire extension were obtained, succeeding the model between the above parameters and weld pool width.

介绍了铝合金MIG焊焊接电流占空比、基值电流、峰值电流、焊接速度、送丝速度对熔宽的影响规律，并在其基础上，通过平板堆焊试验研究了这些参数对焊接干伸长的影响规律；在铝合金机器人脉冲MIG焊平板堆焊过程各焊接参数与正面熔宽之间的传递函数的基础上，采用铝合金平板堆焊阶跃试验，利用曲线拟合法辨识了铝合金机器人脉冲MIG焊动态过程传递函数，建立了焊接电流占空比、基值电流、焊接速度、送丝速度与焊接干伸长之间的对象数学模型。

There are also several branches affiliated to the department now which include the Teaching and Research Section of Naval Architecture and Ocean Engineering, the Institute of Naval Architecture and Ocean Engineering (a first rate design institute in Guangdong Province), the Ship Model Towing Tank, the Marine Material Test Center, the Laboratory of Harbor and Channel.

本专业是以数学、力学、机电为基础，全面应用信息技术从事船舶与海洋工程结构物及相近领域的设计、研究、制造、规划、经营与管理等的工程学科，本专业长期以来奉行&厚基础、严要求、重能力、强适应&为办学宗旨。

This subject takes the thick metal sheet as the research object, adopting combination of physics analysis and mathematics calculation, combination of the theories study with computer simulating and concretely experiment, at the basic of analyze the stress strain of sheet"s thickness direction, consider the influence of sheet"s thickness variety and the stress straining neutral layers variety to the craft parameter, in the basic of using for reference of the sheet, figure out the craft process and craft parameter of the sheet.

本课题以金属厚板为研究对象，采用物理分析和数学计算相结合、理论研究与计算机模拟和具体实验相结合的方式，在分析板厚方向应力应变状况的基础上，考虑板厚变化和应力应变中性层变化对弯曲工艺参数的影响，在借鉴薄板弯曲的基础上总结出厚板弯曲的一般计算方法。

Major Courses: Advanced Mathematics , Physics , Engineering Drawing , Engineering Mechanics, Electrotechnics and Electronics , Mechanical Manufacture Basis , Materials Forming Basis, Mechanical Principle and Design, Mold CAD/CAM Software Application, Plastics Forming Machinery, Sheet Metal Forming Technology and Mold Design, Plastics Mold Design, Mold Manufacture Technology, and so forth.

主要课程：高等数学、大学物理、工程制图、工程力学、电工电子技术，机械制造基础、材料成型基础、机械原理和设计、模具CAD/CAM软件应用、塑料成型机械、冲压工艺及模具设计、塑料模具设计、模具制造技术等课程。

Attempts to correlate this metric output with both experimental target detection probability and detection time yield rather good results.(2)Based on the Search_2 dataset provided by TNO Human Factors Research Institute of Netherlands, via a simple mathematical model, the target structure similarity measure is used to quantitatively describe the effect of background clutter on the human false target detection probability.

2以目标结构相似性尺度为背景杂波度量因子，以荷兰TNO人类因素研究所提供的Search_2试验数据库为基础，通过构建数学模型的方法，定量分析了背景杂波对观察者目标虚警概率的影响，并在此基础上，讨论了人眼视觉在背景杂波干扰下的虚警概率表征模型。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。