消去

For example, sometimes it is known apriori that only a smaller number of variables are of interest.

更一般的做法是，数据分析之前通常进行一个&特征选择&步骤，来消去与所需特征无关的或与其他特征高度相关的属性，以达到维度约简的目的。

The heating mechanism of chromosphere from coronal soft X-ray radiation, was introduced self-consistently for first time; in numerical technique, we developed an elaborative method to resolve and track the transition region as well as chromospheric condensation.

在计算方法上，提出了增加辐射损失项循环来迭代求解动力学方程组的总体计算方法；并详细阐述了精确分辨和跟踪过渡区的网格调整方法，包括插入、消去和跟踪色球压缩区的方法，并就整个计算实现过程进行了讨论。

Image scrambling transform ; Doolittle decomposition ; Crout decomposition ; Gauss-Jordan elimination ; inverse transform ; multiplication inversion

图像置乱变换；杜里特尔分解；克劳特分解；高斯-约当消去；逆变换；乘法逆元

The reaction products between disubstituted phosphinosilane and alkynes were those eliminating SiMe3 after addition rather than those via normal addition.

二取代膦基硅烷和炔类化合物之间的反应不是一般的加成产物，而是加成后SiMe3被H消去的产物。

SPWSG contains α-glucosidic bonds;furthermore the type of the glucosidicbonds was pyranose;protein was covalently linked with carbohydrate by O-glycosyllinkage.

红外光谱和β-消去反应表明：甘薯糖蛋白中含有α-糖苷键，糖苷类型主要为吡喃型；糖与蛋白的肽链之间的连接点类型是O-糖肽键。

Main monosaccharide were Arabinose, Xylose, Mannose, Glucose and Galactose. The structure of SPG was studied by IR and alkaline β-elimination reaction. It was found that:(1) SFG contains α-glucosidic bonds;(2) the type of the glucosidic bonds was pyranose,(3) the protein was covalently linked with the carbohydrate by 0-glycosyl linkage.

气相色谱分析表明甘薯糖蛋白中糖链部分含有鼠李糖、阿拉伯糖、甘露糖、葡萄糖、半乳糖；红外光谱和汗消去反应表明：甘薯糖蛋白中含有α-糖苷键，糖苷键类型主要为吡喃型；糖与蛋白的肽链之间的连接点类型是O-糖肽键。

The result showed that the reaction mechanism between niobium ion and CS2 is an insertion-elimination mechanism. Intersystem crossing may occur in the reaction Nb+ with CS2 and a minimum energy crossing point has been found.

结果表明Nb+与CS2的反应是插入－消去反应，在反应过程中会发生系间窜越，并且找到了两个势能面的能量最低交叉点。

By a large scale test ,we get the balance point of the traditional BEM and fast multipole BEM up to 1700~1800 degrees of freedom.

因此，需要大容量的内存，而方程组的求解一般采用高斯消去法或由它演变得到的其他方法。

The mechanism of the dehydrogenation reaction of OsO〓 with methane For the reaction, OsO〓+CH〓→OOs〓+H〓, the minimum energy reaction path involves two PESs of quartet and doublet states.

因此整个反应的速率决定步骤是分子氢从二重态的亚甲基二氢化物中还原消去，能垒大约为30.4kcal/mol.c。

With its beautiful scenery, profound culture and history and the primitive folk customs, Pingle, is a place where you can cast your worry and anxiety away.

山情水韵的平乐古镇，依山而建，因水而兴，以水为乐，是一处来了就消去烦恼的地方

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。