1) Knowledge gradient
知识梯度
2) knowledge density gradient
知识密度梯度
1.
Thirty Chinese core bioinformatics journals were determined using the concept of knowledge density gradient in combination with the distribution pattern of journal papers,and the newly founded Chinese bioinformatics journals were evaluated using the impact weight,reputation coefficient and H index.
以知识密度梯度的概念和期刊论文分布特征相结合确定了30种生物信息学中文核心期刊,以影响权重、声誉系数和H指数对新创刊的生物信息学中文期刊进行了评价。
3) ladder knowledge
阶梯知识
1.
By using the above two characteristics,the concepts of ladder knowledge,the generation of ladder knowledge and the attribute dependence of knowledge were presented,the attribute dependence mining theo-rem of knowledge and the attribute dependence mining-state recognition criterion of knowledge were proposed,and the applica-tions of attribute dependence.
给出阶梯知识,阶梯知识生成,知识属性依赖的概念,提出知识的属性依赖挖掘定理,知识的属性依赖挖掘-状态识别准则,给出知识的属性依赖挖掘的应用。
4) perception gradient
感知梯度
1.
Firstly,the study transformed the inverse halftoning image and the original image into S-CIELab color space,by defining perception color difference and perception gradient,a quantitative index is constructed for apraising the color inverse halftoning image.
首先,将图像变换到视觉均匀颜色空间S-CIELab空间,通过定义人眼感知色差图像和感知梯度图像,构造评价彩色逆半调图像质量的定量指标。
补充资料：G(?)teaux梯度
G(?)teaux梯度
Gateaux gradient
‘凌如以梯度【珑加倒优脚曲斌;raTo rp”脱.TI，田-咖李回H的俘甲f夺丁卓x0牛的 H中与f在x。的C自妞.玫导数(G云姗uxderi珊tiVe)f。(x。)相等的向量.换句话说，G舀teaux梯度由公式 f(x。+h)二f(凡)+(无(x。)，h)+。(h)定义，其中。(th)/t~0，当t~0.在”维Eodid空间中C冶姗以梯度f。(x。)为具有坐标 了叮(x。)___盯(凡)、 \口x:”口x，了的向量，并简称为梯度(脚djent).C冶如ux梯度概念可以推广到下列情形:X为侧组日的n流形(有限维)或无穷维Hilbert流形，而f为X上光滑实函数.f在其C冶如以梯度方向上的增长大于过此点任何其他方向的增长. B.M.THxo栩叼Po.撰郑维行译沈永欢、王声望校
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条