Between the two consecutive points , there are two knot intervals , and the combination of the two knot intervals is used to define the final knot interval . a comparison of the new method with several existing methods is included 每一个数据点处都可构造一条二次曲线，该二次曲线可为两个相邻的参数区间指定节点值，所以每一个节点区间对应两个节点值。
In this study , the author puts forward a conic model for brand development . this model focuses on the continuous development of a known brand , and it will help direct the brand development of all enterprises 在研究中笔者还提出了一个品牌发展二次曲线模型，该模型着重强调了一个知名品牌今后的可持续性发展，它将在指导所有企业的品牌发展战略中，具有一定的现实意义。
4 . the results indicated that the applied nitrogen amount had a quadratic curve relation with grain yield . yield and profit increased with the amount of nitrogen applied under a certain amount of nitrogen 田间试验结果表明，施氮量与产量呈二次曲线关系，在一定的施氮量范围内，产量和经济效益都随施氮量增加而提高，超过施氮量阈值，增加施氮量，产量和经济效益下降。
Expatiate the substance of projective reconstruction is solving fundamental matrix , substance of affine reconstruction is solving infinite homography or infinite plane and substance of metric reconstruction is solving absolute conic images 阐述了射影重构的实质是求解基本矩阵，仿射重构的实质是求解无穷远平面或无穷远平面单应，欧氏重构的实质是求解绝对二次曲线的像。
In order to verify the feasibility of ann , adopting same training sample the author establishes quadratic curve model and index model of tourism foreign exchange income and cubic curve model and index model of total inbound tourist quantity 为了验证人工神经网络模型的可行性，笔者用同样的训练样本分别建立了旅游外汇收入二次曲线模型、指数曲线模型和入境游客三次曲线模型、指数曲线模型。
The results indicated that there were significantly positive correlation among most amino acids and protein contents ; and 4 linear regression , 5 quadri - curve and 7 cubic - curve respectively between each amino acid and protein content 结果表明，大多数氨基酸及其与蛋白质含量之间存在显著的正相关关系；各氨基酸与蛋白质含量之间分别有4种呈线性回归关系， 5种呈二次曲线关系， 7种呈三次曲线关系。
The algorithm of camera ' s self - calibration is always a important research domain . in this paper by taking advantage of parallel lines and orthogonal lines in architecture as usual , we can calculate the absolute conic image and vanishing points 摄像机自标定的线性算法一直是计算机视觉领域的研究热点，本文利用场景中的两两正交三条直线，计算直线的消失点，进而线性计算绝对二次曲线的像。
Furthermore , the forms of slip surface are generalized into conic curve no longer taking the magnitude of cohesion into account . and the method of slope stability analysis for anchor - reinforced or discharged slope is also presented 假定滑面上应力分布形式，文中进一步将粘性土坡和无粘性土坡的滑面形式统一起来，在计算过程中不再根据粘聚力的大小来假定不同的滑面形式，均将滑动面形式假定为二次曲线。
4 . the relation between the degree of power distribution and performance is a conic , and it lies a reasonable value to make performance highest . it will make against to get high performance that power is centralized or decentralized excessively 在结论3下进行具体分析，集权度与企业绩效之间是二次曲线的关系，存在一个较合理的集权度数值使企业具有最好绩效，权力过于集中或者过于分散都不利于企业获得高绩效。
The program we made can calculate all kinds of compensating errors of quadric curve whose calculation accuracy can reach 10 - 6mm . the machining tools we devised can perform the functions of interception of quadric curves and errors compensation , which meets the demand of basic movements 编制出的程序可计算出各种二次曲线的补偿误差，精度可达10 ~ ( - 6 ) mm ，设计出的加工机床可完成二次曲线的截取，补偿等功能，满足基本运动要求。
