近于...

And in the third chapter, we give the estimation of variance of the estimation value of each parameter by using the Delta method and show that the asymptotic property that the estimation value tend to the real value as X tends to be infinite.

在第三章中，我们利用δ-法给出了各参数估计量的方差，证明了当λ趋向无穷大时，估计值趋近于真值的渐近性质。

The origin of the No. 7 nugget found in south suburbs of Yiyang city of Hunan mainly comes from plaeovolcanic rock and the gold veins and the basic volcanic clastic rock in Nenjiaxi Group slate around the plaeovolcanic rock. Its origin belongs to near source or autochthon sedimentary regeneration.

湖南益阳南郊 7号"狗头金"的金源主要来自古火山岩及其边部冷家溪群板岩中的含金矿脉与基性火山碎屑岩系，属近源甚至近于就地的沉积再生成因。

Best made in summer and aged six months. Look for a thick, gray rind. Made in Auvergne from 2,000 years. Cantalet is a modern, smaller, barrel-shaped version.

在近于100磅的奶酪轮上有铝印标明生产者；最好的奶酪制作于夏季并贮藏6个月，其外壳厚，呈灰色；此奶酪自 2000年前即产于Auvergne，Cantalet是一款更现代、更小、桶形版本的奶酪。

In processing high sampling data system, discrete time model using delta operator approaches corresponding continuous time model, and the results also tends to the corresponding ones of its continuous counterpart.

在处理高速采样过程时，Delta算子离散模型接近于原来的连续模型，所得结果也趋近于连续模型的相应结果，较好地解决了传统的移位算子方法在高速采样时引起的数值不稳定问题。

Since 1980 the river net pattern began to show typical features of artificial river system with straight watercourse, low curvilinearity.

近百年来扬中的渠网系统发生了显著变化。1935年和1958年河港为近于自然树枝状水系。1980后河港格局表现出典型的人工水系特征，到1994年河港数量和长度明显增加，网络的结构趋于复杂，河港网络趋于完善，但城镇及其附近的渠道和池塘逐渐减少。

Finally, in the third section, by constructing some functional which similar to the conservation law of evolution equation and the technical estimates, we prove that in the inviscid limit the solution of generalized derivative Ginzburg—Landau equation converges to the solution of derivative nonlinear Schrodinger equation correspondently in one-dimension; The existence of global smooth solution for a class of generalized derivative Ginzburg—Landau equation are proved in two-dimension, in some special case, we prove that the solution of GGL equation converges to the weak solution of derivative nonlinear Schr〓dinger equation; In general case, by using some integral identities of solution for generalized Ginzburg—Landau equations with inhomogeneous boundary condition and the estimates for the L〓 norm on boundary of normal derivative and H〓 norm of solution, we prove the existence of global weak solution of the inhomogeneous boundary value problem for generalized Ginzburg—Landau equations.

第三部分：在一维情形，我们考虑了一类带导数项的Ginzburg—Landau方程，通过构造一些类似于发展方程守恒律的泛函及巧妙的积分估计，证明了当粘性系数趋于零时，Ginzburg—Landau方程的解逼近相应的带导数项的Schr〓dinger方程的解，并给出了最优收敛速度估计；在二维情形，我们证明了一类带导数项的广义Ginzburg—Landau方程整体光滑解的存在性，以及在某种特殊情形下，GL方程的解趋近于相应的带导数项的Schr〓dinger方程的弱解；在一般情形下，我们讨论了一类Ginzburg—Landau方程的非齐次边值问题，通过几个积分恒等式，同时估计解的H〓模及法向导数在边界上的模，证明了整体弱解的存在性。

This chapter is dedicated to the study of the properties of close-to-convex univalent harmonic mappings.

在这一章中，我们主要研究了单叶调和映照的近于凸子族，首先给出了近于凸单叶调和映照与正实部解析函数之间的一个关系。

SHRIMP and LA-ICP-MS zircon U-Pb dating yielded some age data: the Longchahe porphyritic granite is (81.2±1.4)~(83.2±1.4) Ma, the porphyritic granite in Malage-Songshujia area is (82.8±1.7) Ma, the porphyritic granite in Laochang area is (83.3±1.6) Ma and the Baishachong equigranular granite is (77.4±2.5) Ma.

文章首次采用LA-ICP-MS和SHRIMP U-Pb方法对研究区内的花岗岩进行了精确定年，数据表明，不同类型的花岗岩同时或近于同时形成。龙岔河似斑状花岗岩主要形成于(82.0±0.3)~(83.2±1.4)Ma，马拉格－松树脚似斑状花岗岩形成于(82.8±1.7)Ma，老厂似斑状花岗岩形成于(83.3±1.6)Ma，白沙冲等粒花岗岩形成于(77.4±2.5)Ma，均集中形成于晚白垩世。

Molal contents of alkalescence component and alumina showed in the Seger-formula were similar to each other in the same series. Mixture of materials was melted at 1 270～1 290 ℃, and treated with heat preservation in the range of crystallization temperatures (at 1120 ℃) for 25 minutes. Results showed: if CaO/MgO≈1, crystallate was melilite when O/Si was cl...

结果显示：CaO/MgO≈ 1时，O/Si值近于3 。1时析出钙镁黄长石，在 3左右同时出现黄长石和透辉石，小于 3为透辉石，继续减小开始产生少量硅灰石；CaO/MgO≈0 。5时，O/Si值大于 3 。1时同时形成钙镁黄长石和透辉石，近于 3时仅出现透辉石。

The DNG structure unit is composed of square split ring resonator and strip wire. The modified NRW method is used to extract the equivalent permittivity, permeability, and refractive index from the scattering parameters of the two-port waveguide with DNG structure. At the designed operating frequency, the refractive index approximates zero, which makes the nondirective electromagnetic wave tend to approximate plane wave along the normal direction of the superstrate and congregate the radiation energy.

以方形的SRR环和金属条带构成双负媒质结构单元，使用修正的NRW方法，通过放置双负媒质结构的二端口波导的散射参数，提取了等效的介电常数、磁导率和折射率，在所设计的工作频率，折射率接近于0，可以将原本发散的电磁波整理成趋近于覆层面法线方向的近似平面波，起到能量汇聚的功能。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。