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The rational points of an elliptic curve forms an additive group. The discrete logarithm problem of this group is called elliptic curve discrete logarithm problem.

椭圆曲线上的有理点会形成一个加法群，此加法群上的离散对数问题称为椭圆曲线离散对数问题(elliptic curve discrete logarithm problem)。

Materials and Methods:236 pathology-confirmed breast lesions(155 malignanty,81 benignancy) and 221 disease-free contralateral breast tissues were examined using EPI-DWIb values=0,1000 s/mm~2TR/TE=8400ms/93.8ms; FOV=30×30cm;matrix=128×128;ASSET=2,slice thickness=4mm.DCE-MR imaging was also performed for accurate location of the lesion using VIBRANT sequence.The mean ADC values of malignant and benign lesions and the disease-flee contralateral breast tissues were calculated from the ADC map for each patient.One-way analysis of variance was applied to compare the mean ADCs of malignant lesions with benign lesions and disease-flee contralateral breast tissues.The threshold ADC value for malignant lesion was determined using a receiver operating characteristic(ROC curve analysis.Each lesion was classified into two major types:mass and non-mass lesion.The diagnostic performance of DWI was compared in breast mass and non-mass lesions.Results:155 malignant and 81 benign lesions were confirmed in 236 lesions.

材料与方法：搜集术前行乳腺MR检查并经穿刺或手术病理证实的236例乳腺病变，以对侧正常乳腺腺体作为正常对照，采用横轴位的平面回波-扩散加权成像序列，TR=8400ms，TE=93.8ms，层厚=4mm，激励次数=2：视野=30×30cm，矩阵=128×128，ASSET=2，b值=0和1000s/mm~2；参考动态增强图像准确定位，测量病变区和对侧正常乳腺腺体的ADC值，应用t检验比较良、恶性病变及正常腺体ADC值的差异，采用接收者工作特征曲线(receiver operating characteristic curve，ROC)确定良恶性病变的ADC界值；根据BI-RADS MRI将乳腺病变按照形态学表现分为肿块性病变和非肿块性病变两组，比较ADC值在肿块和非肿块性病变中定性诊断的效能。

To use linear program, we have to take care of two problems. The first problem is that the actual relationship between intensity and duration is nonlinear convex function. In this study, we propose to use piece-wise linear curve to approximate the nonlinear convex curve. The second problem is that there are many feasible event sequences.

使用线性规划遭遇的困难有二：第一，作业强度与作业时间呈非线性之凸函数关系，因此本研究将使用片段线性曲线(piece-wise linear curve)近似作业强度与作业时间呈非线性之凸函数关系；第二，专案有很多组可能事件顺序，事件顺序的不同会产生不同的资源限制式，本研究提出一个系统化的方法求解问题。

The Pythium ultimum (soil-borne pathogen) damping-off, which wasmeasured by AUDPC (area under disease process curve), oscillated with significant harmonicsand similar periods to Copiotrophic CFUs after nutrient impulses.

土传病菌P。 ultimum致病性的AUDPC(area underdisease process curve)在添加牛粪堆肥后短期内呈简谐振动模型变化，且与Copiotrophic菌数量的变化有相同的简谐振动频率与周期。

Therefore, the proposed parallel algorithm can be applied to speed the selection of the base point of the elliptic curve cryptography over GF, improving the speed of encryption and decryption of ECC.

因此该算法可用于椭圆曲线密码(Elliptic Curve Cryptography， ECC)中基点的快速选取，从而提高ECC的加／解密速度。

The other attributes of the Bold 9700 are like the BlackBerry Curve 8900 and Tour: They all have cameras with flashes that are capable of capturing 3.2-megapixel photographs, bright 480x360-pixel displays, built-in GPS and slots for microSD memory cards so as to expand their memory.

Bold 9700的其他一些特性跟Curve 8900和Tour一样，它们都有内置闪光灯的照相功能，可拍320万像素的照片，拥有明亮的480×360像素显示屏、内置GPS，还有microSD扩展记忆卡插槽。

Environmental Kuznets Curve roughly reveals inverse U relationship between environmental pollution and economic development.

环境库兹涅茨曲线(Environmental Kuznets Curve，EKC)粗略地揭示了环境污染与经济发展之间的倒U形关系。

Moreover we formulize the optimal path according to the theory of B-spline Curve, so the path which is composed by the grid point can transform into a continuous and smooth curve. By formulizing path we can also calculate angular velocity, angle acceleration, and torque in dynamics.

另外我们根据B-spline Curve的理论将最佳路径参数化，使由格点所组成的最佳路径转换为一条连续且平滑的曲线，藉此我们也可以计算动力学中的瞬间角速度、角加速度与力矩。

And we by the NDR curve of the IV curve can be observed, NDR device has a very special non-linear phenomenon, Usually composed of a non-linear circuit components are usually chaotic phenomenon, so we raise our six different structure in addition to the new frequency, and to explore the phenomenon of chaos, and the use of the cycle of chaotic phenomena in addition to the frequency multiplier effect achieved .

而我们由NDR的I-V curve曲线可以观察到，NDR元件具有非常特别的非线性现象，而通常一个非线性元件所组成的电路通常会有混沌现象，因此我们提出六种不同架构的新型除频器，并且探讨其中的混沌现象，而利用混沌现象中的周期倍增所实现除频效果。

Figure 4 c curve curve shapes can make the image darkened deepen and high-profile sulci.

图四c的Curve弧线轮廓可以使图像暗调增浅而低调变浅。

We are interested in your suggestions about appointing us to be the single dealer.

对贵方建议由我方担任独家经销商一事，我们颇感兴趣。

Three types of empty-shell marriages have been identified. In a devitalized relationship husband and wife lack excitement or any real interest in their spouse or their marriage.

一种是死气沉沉的婚姻：在这种婚姻关系中夫妻俩对于配偶或婚姻缺乏激情，或者缺乏真正的兴趣。