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分析曲线

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For the key of vector- Distance algorithm , Curve fitting is used for the derivation of deviation angle algorithm, demonstrating the feasibility of deviation angle Algorithm and the error analysis.

针对矢量距离算法的关键,采用曲线拟合对计算偏离角的关系式进行了推导,论证了偏离角算法的可行性,对算法进行误差分析,用归纳的方法推导出计算磁短节中点与直井之间距离的关系式。

From the simulation analysis, we can get yaw angular velocity and lateral acceleration respond curves and analyze in detail several common evaluation targets of handling stability.

通过仿真,得到汽车在不同车速、不同转向盘转角输入速度和不同载荷下的横摆角速度与侧向加速度响应曲线,并详细分析了几个常用的操纵稳定性评价指标。

Based on the laminate theory, a laminate weakened by damage is treated as an anisotropic thin plate. Using the complex potential method in the plane theory of elasticity of an anisotropic body, the series solution of finite anisotropic thin plate containing an elliptical inclusion is proposed with the help of Faber series. A hybrid element with an elliptical inclusion for anisotropic materials is obtained by using the hybrid variable principle, and the element efficiency is verified by numerical examples. The state of the damage is modeled by an elliptical soft inclusion, and using the point stress criterion based on characteristic curve and Yamada-Sun etc. criteria, the prediction of the strength of a composite laminate with damage is set up. The effects of various parameters on the stress distribution and the residual strength of a composite laminate weakened by damage are detailedly studied.

首先基于经典层板理论,将复合材料层板的弹性问题化归为均匀各向异性板来求解;采用各向异性体平面弹性理论中的复势方法,以Faber级数为工具,给出了有限大含椭圆核各向异性板弹性问题的级数解形式;利用杂交变分原理,成功导出含椭圆核各向异性板杂交应力有限元,并用算例验证了该单元的可行性和有效性;采用含刚度折减椭圆形弹性核的冲击损伤模型,引入基于特征曲线和Yamada-Sun破坏准则的点应力判据,建立了含损伤复合材料层板剩余强度的分析方法;通过数值计算详细讨论了各种几何参数对损伤层板应力分布、剩余强度的影响,得到了一系列对工程应用具有实用价值的结论。

With this approximation, detailed error analysis was completed, and two new methods were proposed: the like triangle method and the sinusoid method.

通 过对经典计算方法的误差分析,推出了2种新的计算方法:相似三角形法和正弦曲线法。

Department of Scientific History and Archaeometry; Graduate University of Chinese Academy of Sciences; Beijing 100049;4.Institute of Archaeology; Chinese Academy of Social Sciences; Beijing 100710; China;The fabrication technologies in terms of phase composition,structure,firing temperature,porosity,density and water permeability of ceramic water pipes and contrastive ceramic tilesexcavated from Anyang Yin Ruins of Shang dynasty were studied by X-ray fluorescence,X-ray diffraction and dilatometer,respectively.It was found that the contents of CaO,K2O,MgO and P2O5 in CWP were relatively higher than those in contrastive CT.The difference was further confirmed by the mass ratio of flux...

采用X射线荧光、X射线衍射、热膨胀等分析手段对比研究了安阳商代陶水管的制作工艺,发现陶水管化学成分中各类熔剂的质量分数均略高于对比陶片中熔剂的质量分数,CaO、K2O、MgO等助熔剂与A l2O3的质量比进一步证实该现象,而这种差异性则外在地表现为陶水管的气孔度低于对比陶片以及陶水管热膨胀曲线中出现玻璃化现象,该结果表明陶水管原料应为一种易熔粘土,或者在沉淀粘土中人为地掺和了草木灰类掺和料,这有利于陶水管烧制与成型,有助于熔剂在熔融状态下,较好地进入陶水管中的空隙,使陶水管变得更加致密,一定程度上有利于防止陶水管的渗水,显示出陶水管制作工艺的特殊性。

The ceramic mud of concentration of 40%-60% are measured, the measured voltage and its corresponding ceramic mud's argil content relationship was analyzed, it is liner for ceramic mud of concentration between 40%-60%.

分别检测浓度为40%-60%的陶瓷泥浆样本,记录、分析这组电压值和陶瓷泥浆浓度的关系后知道:在陶土含量为40%-60%之间的数据曲线是线性的。

According to the geometric relations, the relationship expression of the residual asperity height between the average dilatancy angle is established.

通过对节理试验前后的表面特征、循环剪切试验曲线的分析,提出了一个节理表面磨损的等效计算模型。

The foundation of this system provides a good reference to promote the standardization and intelligence of the overhaul and maintenance of vacuum switches. This paper develops a special HF pulse power supply for internal pressure estimation, which achieves the output of HF-HV sinusoidal pulse wave whose frequency and amplitude can be modified respectively, and meets the design requirements according to the results of Simulink simulation and practical experiments. With the help of AT89S52, this paper designs an I~2C serial bus based signal detection system for peak value signal acquisition of HF pulse currents, which communicates with the upper computer by asynchronous serial communication for uploading the data. In the upper computer, a human computer interface is developed by Matlab software, whose functions are to do some computation and graphic display, such as calibrating the relation curve of vacuum degree and peak value of HF pulse currents, vacuum degree computation, and vacuum lifetime evaluation analysis basing on grey forecasting model as well as making relative suggestions.

本文研制了用于真空度检测的高频脉冲电源,通过Simulink仿真和试验检验其满足设计要求,实现了电压幅值和频率独立可调的正弦波高频高压脉冲输出;利用以AT89S52为核心基于I~2C串行总线的信号检测系统实现高频脉冲电流峰值信号的采集,通过异步串行通信实现单片机与计算机之间的数据通信,将检测数据传至上位机;在上位机利用Matlab开发人机交互界面,实现相关数据处理和图形显示,包括真空度——高频脉冲电流峰值关系曲线标定、真空度数值计算、基于灰色预测模型的真空寿命评估分析和提出相应决策建议。

This paper use ABAQUS software to analyze different shapes of concrete columns under axially loading strengthened by fiber reinforced composite materials and the relationship of axil stress and axial strain.

中文摘要本文利用有限元素软体ABAQUS分析复合材料围束不同断面形状之混凝土构材的轴向抗压强度与其应力-应变曲线之力学行为。

ABSTRACT Objective:To study the ultrasonographic and acoustic contrast features of axillary lymphatic metastasis of breast cancer.

分析24例乳腺癌腋窝恶性淋巴结的声像图表现与4例恶性淋巴结超声造影曲线形态的变化。

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And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时,论述了一体化管理体系构建中的几个主要问题,包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。

If you're huffing and puffing at any point during the run, slow down and make sure you can take deep breathes.

如果你任何时候在跑步过程中气喘如牛,降低速度并且确保你能够深呼吸。