查询词典 first-order derivative

Furthermore, a method is also given to determine projecting image of the first derivative vectors on a sphere under the stereographic projection.

然后，逆投影回球面得到一条球面有理插值PH曲线。

The powder pharmaceutical samples of sulfaguanidine are analyzed nondestructive by conventional and first derivative near-infrared diffuse reflectance spectra.

用常规和一阶导数近红外漫反射光谱法非破坏分析了粉末药品磺胺脒。

What is unique about Australia is not its sun-baked, derivative society, clinging to the sea, but its first people, the oldest on earth, whose skill and courage in surviving invasion, of which the current onslaught is merely the latest, deserves humanity's support.

什麼是澳大利亚独特之处不是它的太阳烤，衍生的社会，抱住大海，但它的第一人，最古老的地球上，他们的技能和勇气，幸存的入侵，而目前的攻击仅仅是最新的，值得人类的支持。

The key of the algorithm is how to estimate the derived vector of the surface curve or the first derivative of the surface of revolution according to the given length or area constraint.

算法的关键在于如何利用已知的弧长或面积约束来估计空间曲线或旋转面的旋转曲线在节点处的导向量或一阶导数值。

It is proved by using the function approximation theory and martrix theory that for a degenerate elliptic equation of the first class, if the third boundary value condition is satisfied at its nondegenerate boundary and the given derivative values are satisfied at its degenerate boundary, then its solution is existent and unique.

摘 要 运用逼近理论及矩阵理论证明：如果一类退化椭圆型方程在非退化边界上满足第三边界条件，在退化边界上满足给定微商值，那么它的解是存在且唯一的。

It also testifies the intermediate variate in the system is servo valve loading pressure; compensator is a first derivative element.

可以证明本系统的这种观测量是伺服阀的负载压力，而所谓补偿器是一个一阶微分环节，因而容易实现。

First derivative spectrophotometric method for determining of micro samarium in electroplating solution is given,using xylenol orange as color reagent.

提出了利用二甲酚橙为显色剂测定电镀液中微量钞的一阶导数分光光度法。

METHODS:AsOR was conjugated to PL by EDC; The active ester of PEG derivative was reacted with the amino groups in PEI to form PEG-PEI conjugate; DNA was first complexed with PEG-PEI and then with AsOR-PL. In vitro transfection experiment was conducted in the galactose receptor positive Huh-7 cells.

分别制备AsOR-PL偶合物及PEG-PEI偶合物，然后按照不同的比例先后与报告基因DNA形成复合物，再进行Huh-7细胞的体外转染试验和静脉给药后小鼠体内的表达试验。

Since May this year, entries for the national assembly since thethird "Divine Charm" National Paper-cut paper-cutting competitionand the first national creative contest received a total of 2,000entries, after intense selection, of which more than 100 pieces ofpaper-cut fine, and product have been award and exhibition on thesame day to meet with the audience, in addition to "Top Ten Godscissors" and other fine paper-cut, the most creative audience orthose full of paper-cut derivative products.

自从今年5月份面向全国征集参赛作品以来，第三届&神州风韵&全国剪纸大赛暨首届全国剪纸创意大赛共收到2000余件参赛作品，经过紧张评选，其中100多件剪纸精品和产品获奖并在当天的作品展上与观众见面，除了&十大神剪&的剪纸精品以外，最受观众欢迎的还是那些创意十足的剪纸衍生产品。

Amino-monomethoxypoly(ethy1ene glycol)(mPEG-NH2) was synthesized based on the principle of Gabriel synthesis.Monomethoxypoly(ethy1ene glycol) tosylate was prepared at first,and then reaction with potassium salt of phthalimide as nucleophile to produce the monomethoxypoly(ethy1ene glycol)phthalimide derivative.

摘 要：首先合成了单甲氧基聚乙二醇对甲苯磺酸酯，然后根据盖布瑞尔合成法原理，以邻苯二甲酰亚胺钾盐为亲核试剂与mPEG-OTs反应，生成单甲氧基聚乙二醇的邻苯二甲酰亚胺衍生物，mPEG-PI与水合肼反应肼解生成伯胺，合成了一端为氨基的单甲氧基聚乙二醇(mPEG-NH2)。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。