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Space debris, in general, has been a growing concern for NASA and other spaceflight operators due to the unprecedented crash of a Russian and American satellite earlier this year. The Feb. 10 smashup in space created two new large clouds of debris that have been continuously tracked by the Department of Defense's Space Surveillance Network.

由于今年早些时候俄罗斯和美国的两颗卫星相撞在一起，现在美国宇航局和其他太空飞行操作员对太空垃圾更加关注。2月10日的撞击事件在太空形成两个新碎片云团，美国国防部空间监视网一直在对这些太空碎片进行追踪。

The results show that the models could correctly reflect the alteration of the smudginess coefficiency and give the advice of on-line soot-blowing to the operators.

大量试验表明，本文所建的模型能够准确地监测锅炉灰污的发展状况，并能起到指导和优化吹灰的作用。

Softbank in Japan is particularly keen on this, as are incumbent operators in France, Germany and Italy.

所以如同法国、德国和意大利的主体运营商一样，日本的软体银行公司对此情有独钟。

Ship operators can conduct, and regularly review, their TMSA assessments online at www.ocimf-tmsa.com. User names and passwords to access this database-driven website tool will be issued by OCIMF for a nominal software licence fee.

船舶管理者可以在网上定期进行自己 TMSA 评估，网址为：www.ocimf-tmsa.com，只需支付指定的软件许可证费即可从OCIMF 得到进入该网站的密码。

The major implementations of the developed model include: Pseudo-spectral and finite-difference schemes are employed to approximate the spatial-differential operators in the horizontal and vertical directions, respectively. A second-order Runge-Kutta method is adopted to integrate in time for the velocity field and the free-surface elevation. The solenoidal condition of the velocity field is satisfied by solving the transformed pressure Poisson equation. A modified secant method is used to accelerate the iterative solution of the non-separable Poisson equation.

模式的主要数值方法包括：分别以拟频谱法以及二阶有限差分法近似控制方程与边界条件中的水平与垂直导数；以二阶Runge-Kutta法进行非稳态的自由液面位移与流场速度的时间积分；利用改良式割线叠代法求解计算区间中不可分离的压力Poisson方程式，以满足不可压缩流条件。

As to the topology structure of the network with constraints, a new tree encoding for Genetic Algorithms was developed to represent a tree solution containing the information of degree and connectivity on for its corresongding genetic operators, which could be used to solve the minimum spanning tree problem with degree constraint, capacity constraint, and leaf constraint.

本项目主要研究了带约束网络拓扑结构的设计与优化；供应链网络拓扑结构的设计与优化；移动信息网络位置管理的策略与优化。

Using two new methods, this paper prores one pertubation theorem on the finite Hilbert space of 2×2 operator matrices, and gereralizes this theorem to the infinite Hilbert space of selfadjoint operators.

给出了有限维Hilbert空间中2×2算子矩阵的数值域扰动定理的两种证明方法，并且将该定理推广到无限维Hilbert空间上的自伴算子。

The eigenvalue and the spectral radius of linear completely continuous operators are very important and significant indexes.

线性全连续算子的特征值和谱半径是非常重要的、具有实际意义的指标。

Using Fourier Transform, then defined the Filtering Operators which can be used for remove the Swath Error quickly and exactly. I didn't know the appropriate spectral Calibration methods of space hyperspectral data before this study.

通过对不同种类的大气校正方法的研究，在缺少同步野外实测数据的情况下，运用大气辐射传输模型对数据进行了大气校正，取得了良好的校正效果。

The cheapest way to get one is to invoke the spectral theorem and to conclude that normal operators always have non-trivial invariant subspaces.

取得这样结果的最省力的尝试是引用光谱定理而得到正规算子恒有非平凡不变子空间的结论。

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。