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First, the reason behind the negative data is analyzed and a nonnegative constraint is imposed on the classic PCA. Then a set of nonnegative linear independence weight vectors of principal components is obtained, by which a low dimensional space is constructed. Finally, a nonlinear optimization technique is used to determine the projection vectors of the high-dimensional multi-spectral data in the constructed space.

首先分析主成分分析法产生非光谱数据的原因，据此对经典主成分分析模型增加非负约束；然后求出一组线性无关的非负主成分权向量，用该组向量构造低维空间；最后用非线性优化技术确定高维数据在该低维空间中的投影值，实现了高维空间与低维空间的相互转换。

We propose a new method of inversion by probability tomography and that allows stable reconstruction of the RTP field with a high fidelity even at the magnetic equator. The inverse model for RTP calculation consists of a set of juxtaposed equivalent prisms.

本文基于概率成像技术提出了一种等效物性的反演方法，实现对地下等效场源的反演成像，取得了对低纬度磁异常稳定化极的效果。

By a more precise estimation of maximum value of a B-spline basis function and utilizing of the local support property of B-spline basis function, the control points of a set of compatible B-spline curves are reduced, which makes the skinning algorithm more effective.

对B样条基函数的最大值进行了更为精确的估计，并且充分利用B样条基函数的局部支撑性，尽可能多地删除相容性处理后B样条曲线的控制点，使得蒙皮算法更加有效。

The notification system block contains a message creator which is also exposed as a WCF service, a set of messaging APIs, an enumeration of message types and a Message Template Data store.

通知制度块包含一个信息的创造者也是一个WCF服务，一个消息的API，一个消息类型和消息模板数据存储枚举暴露。

A set of data standards is established, which controls the unstable factorys into a minimum deviation throught a data-based management ensure a stable improvement of product quality.

制定生产的一套数据标准，将诸多不稳定因素通过数据化管理，以控制住最小波动范围，确保了产品质量的稳步提高。

A common requirement is to define a class as the union of a set of mutually disjoint subclasses.

注意它只声明了Pasta与其它所有类是不相交的。

This project of extension is in a suburban zone of a district of the city of Nantes, facing in a set of building of the 1960s.

该项目位于法国南特郊区，周边是一片上个世纪六十年代的建筑。

Using an improved genetic algorithm combined with a BP algorithm a new method IGA-BP,QSAR model was developed that links molecular structures of a set of 50 alkylated and/or halogenated phenols with their polar narcosis toxicity.

采用改进的遗传算法和BP人工神经网络相结合的方法，研究了50个酚类化合物的麻醉毒性和分子结构之间的相关性，并与单纯用BP人工神经网络建立的模型进行比较。

Using Mellin transform and adopting the mixed boundary condition for stress and displacement differences and affer solving a set of triple integral equations and a Neumann's problem, we obtained a fundamental solution for a single crack.

本文采用裂纹二侧应力差和位移差的混合边界条件提法，通过Mellin变换，在求解了一组三节积分方程和一个Neumann问题后，精确地求得了单裂纹基本解，利用此解给出了解决这类问题的一般方法。

NEWBOLD, run by designer Paul Smith, released a set of Jamesen Etnies sneakers alongside a pair of flip-flop sandals featuring a sunglass all-over print. Exclusively sold at the R.

NEWBOLD，由设计师保罗史密斯负责操行，发布一套沿着一个对的Jamesen Etnies运动鞋以sunglass全面的印刷品为特色的啪嗒啪嗒的响声凉鞋。

I can still vividly recall the impressive scenes you gave. You were among my friends and relatives who accompanied me from my house to the seaport and when the porters were slow to show up, you obligingly carried my suitcase for me.

你对我的种种感人情意，使我记忆犹新，那天你随着我的亲友从家里送我上轮船，搬运工迟迟不来，你毅然替我提着皮箱上船。

St. Nicholas became the patron saint of Russia, where he was famous for his red cape, flowing white beard, and bishop's mitre.

圣尼古拉成了俄罗斯人的守护神，在那里，他以身披红斗篷，留着飘逸的白胡须，戴着主教法冠而闻名。