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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。

Then through solving that equation, a set of nonnegative linear independence weight vectors of principal components was obtained, by which a low-dimensional spectral space was spanned.

针对经典主成分分析法进行多光谱图像数据降维会使重构光谱反射比出现负值的问题，提出一种非负主成分分析法，并用该法构造低维光谱空间，实现高维多光谱数据与低维光谱空间的转换。

Daris took his size as a sign of strength by being a lineman and throwing shot put and discus, but was always self-conscious about his weight.

过去作为线上球员，他扔铅球掷铁饼，以自己的穿衣尺码为强壮的体现，丝毫不以胖为耻。

LOAD FACTOR, The ratio of the lift being produced by the wings to the weight of the aircraft.

装载系数，机翼产生的升力和飞机重量的比值。

And by a wide range of measures, their weight is looming larger.

而且用一个更广范围的指标衡量，他们的比重在增大。

When chitosan dissolved in 2% lemon acid solution, it appeared lucency or translucence, its transparency was not influenced by molecular weight.

溶于2％柠檬酸的壳聚糖溶液呈棕色透明或半透明，其透明度与分子量的大小关系不大，但随着溶液浓度的增加而大幅度地减小。

Mucin is high molecular weight glycoproteins expressed by specialized epithelial cells lining the luminal surface of different organs.

黏蛋白是由特殊的上皮细胞分泌的大分子量糖蛋白。

First, the average weight loss on any diet, regardless of the macronutrient content, is very modest (about 2– 4 kg in total) and certainly does not back up the claims of dramatic results usually made by commercial products.

首先，无论含有什么营养素，从每餐减掉的平均体重都是非常适度的（大约总计2-4千克）而且无疑的不会有被商业食品造成剧烈反弹的结果。

First, the average weight loss on any diet, regardless of the macronutrient content, is very modest (about 2–4 kg in total) and certainly does not back up the claims of dramatic results usually made by commercial products.

首先，任何饮食，无论包含什么营养元素，让人体能够减轻的体重是很有限的（大约总共2-4千克），完全不像一些商业食品所描述的那样会产生明显效果。

"There was a very big seller out there whose order has been completed and the stock, without that heavy weight of selling over, it has bounced up," Andrew Sekely, head of Australian equities at Intersuisse Ltd. in Sydney, said today by phone. There's speculation Magnitogorsk has been selling its stake of 150 million shares over the past few months, he said.

今天，悉尼澳大利亚证券公司 Intersuisse 公司总裁 Andrew Sekely 在电话中说，"卖方很强大，他的订单都已完成了，就算股份没有全部卖掉，它仍然反弹了，市场上正在对过去几个月 Magnitogorsk 公司已经出手了价值1.5亿美元股份进行投机。"

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。