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For fitting ROC curves and getting the area under the ROC curve, we applied the parametric methods of binormal models and ordinal regression models, the semiparametric method of Cox proportional hazards model, the nonparametric methods of Hanley, Delong This paper also include estimation of required sample size, evaluation of confounding effects, and estimation of standard error and confidence interval by resampling method for ROC analysis.

目前该模型用于ROC分析的统计学方法比较完善,属于"经典"的ROC分析参数法。本文探讨了单变量、双变量双正态ROC模型的构建及其参数的最大似然估计方法;采用双变量卡方检验、真阳性率z检验、面积z检验三种方法比较了ROC曲线间是否具有显著性差异。

Energy distribution function and chemical reaction rate coefficient s were calculated through Boltzmann equation analysis and collision theory.

应用碰撞理论和波尔兹曼方程分析,对能量分布函数及反应速率常数进行数值模拟,得到离解反应速率常数与温度的曲线,分析预报各反应过程及表现。

In terms of HHT improving, some new algorithms for curve fitting and boundary processing are proposed.

在完善HHT分析方法方面,提出了基于新的曲线拟合及边界处理算法的改进HHT分析方法。

This paper , which aims at the developing strategy of express service ,researching and analyzing Chinese and foreign express corporations current situation ,forecasts the demand of Chinese express market in 15 years with conic section model on the base of statistics.

本文立足于快递业的发展战略,调查并分析了中外快递公司在我国发展的现状,根据实际的快递业务数据,利用二次曲线预测模型方法对未来15年内的快递市场需求量进行预测,并在分析快递业存在问题的基础上,提出了快递业谋求发展的措施以及应付激烈竞争的对策。

Two common methods of GPS signal coarse acquisition are analyzed and compared in this paper, and an optimized method is adopted. Two common algorithms of calculating fine frequency are analyzed and compared and the conics fitting is designed to calculate the fine frequency. Based on the distributing character of Doppler frequency shift, swing frequency style of Doppler frequency shift search is employed.

对比分析了两种常用的GPS信号粗捕获实现方法,设计了一种优化的实现方法;同时对常用的两种精细载波频率算法进行了比较分析,设计了一种二次曲线拟合的方法计算精细载波频率;基于多普勒频移的分布特点,改变以往顺序搜索的方式,采用跳频搜索的方法。

The structure feature of the sensor was described in comparison with the classical Stewart platform-based six-component force sensor.By using the finite element method,the elastic dynamics theoretical model of the sensor was established based on the conditions of displacement consistency and force balance.According to this model,the numerical analysis was carried out,and the variety relationship curves between the natural frequencies and the structural parameters are plotted.

描述了该传感器相对于经典Stewart平台六维力传感器所具有的结构特点;利用有限元法,采用位移协调和力平衡条件建立了传感器弹性动力学理论模型,依此模型进行数值分析,绘制了固有频率与各结构参数间变化关系曲线;并利用ANSYS软件建立了传感器有限元模型,进行了振动模态分析,得到其固有频率和振型。

The continuous cooling transformation curve was constructed chiefly by means of dilatometry,and combined with metallography to exact fix on the phase transition points of different cooling rate.

连续冷却转变曲线的建立主要应用膨胀法,并辅助以金相分析法来精确分析不同工艺条件下的相变点。

To confirm and expand the mass transit scale of a city is a complex nonlinear convex programming problem.

运用电力系统分析中的负荷持续时间曲线和盈亏平衡点理论对公交车辆规模和静态扩张问题进行了分析,建立了数学模型,并给出了相应的算法。

Through using the method of deflection correlation and curve regression, this paper makes dynamic analysis on the fifth census data of sport ground in Jiangxi province.

研究方法:运用时序分析、偏相关、曲线回归等方法对江西省第5次体育场地普查的数据资料进行动态分析。

Then correlation analysis and ROC curve analysis were performed.

对262例受试者(正常103例,糖耐量减低98例,糖尿病61例)测定尿白蛋白、尿转铁蛋白、尿肌酐;进行相关分析及ROC曲线分析。

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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。