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1.It is useful for the improvement of administrative efficiency;
其对促进行政效率,实现行政目标;收藏指正
2.On-board Processing(OBP) is an important direction in satellite communications, where on-board conversion from FDMA to TDM is very useful in raising channel efficiency and decreasing cost of earth stations.
星上处理是卫星通信技术发展的重要方向,其中星上频分多址至时分复用(FDMA-TDM)多址/复用方式的转换是一个研究热点,因为它能用于构成一种信道利用率很高、地面站成本很低的FDMA/TDM体制的卫星通信系统。收藏指正
3.It is very useful for technicians using these technology in synthetically to improve the efficiency of applying Pro/E,to boost development ability of series manufacture,to speed up the step of changing product,etc.
综合应用这些技术,对于提高Pro/E软件的应用效率,提高系列产品开发能力,加速产品的更新换代步伐有着举足轻重的作用。收藏指正
4.The results show:the groove depth is more important for diffraction efficiency than the duty cycle,which is useful for fabrication of the BSG.
研究发现,在占宽比和槽深这两个光栅结构参量中,槽深的变化对衍射效率更敏感。 这些都为取样光栅的实际制作提供了有意义的结果。收藏指正
5.Because of its simplicity and high efficiency, Cre/loxP site-specific recombination system has been widely used in gene deletion and function identification, gene site-specific integration, gene trapping and chromosome engineering. It has been used as a useful tool for DNA recombination in transgenic yeast, plants, insects and mammals.
由于其作用方式高效简单 ,Cre loxP定位重组系统已在特定基因的删除、基因功能的鉴定、外源基因的整合、基因捕获及染色体工程等方面得到了有效的利用 ,在转基因的酵母、植物、昆虫、哺乳动物的体内外DNA重组方面成为一个有力的工具。收藏指正
6.Here we put forward some useful techniques and suggestions that we have practiced in our classes such as predication,skimming and scanning,reading according to the sense of group,up-down and down-up comprehension and the information gap by the board covering method in addition to learning new words,phrases,analysis of sentences,paragraphs and recitation of texts to raise the efficiency of teaching and learning.
为此 ,我们在实践的基础上 ,提出一些方法与建议 :诸如预测、快读与略读、按“意群”阅读、“自上而下”与“自下而上”理解法、使用“板罩” ; 适当学习生词、短语 ,适当分析句子、段落 ,背诵等 ,以提高这门课的教学质量。收藏指正
7.(19.75%) THG efficiency with chirp pulse of(3.5 nm) bandwidth at average power of (1.5 GW/cm~2) was achieved at(25 mm) optimum distance between two triples in the experiment. It will be useful to solving the problem of the large bandwidth of the THG in the high power laser system.
在1.5 GW/cm2平均功率密度下,实验中最佳距离25 mm处,对带宽3.5 nm的啁啾脉冲取得了19.75%的三倍频效率,这对于高功率激光宽带三次谐波转换的解决很有意义。收藏指正
8.Like F ̄+_2 color center,F ̄+_2 -type center has a strong dipole moment,3 sufficient Stokes shift to allow low self-absorption,yet high efficiency,and broad tunable emission ranges in 0.8-4.0 μm NIR,and made it a potentially useful laser medium,The energy level diagram of F ̄+_2-type center shows an excellent agreement with H ̄+_2model.
F~+_2型心具有跃迁偶极矩大、Stokes位移适当、效率高、调谐范围覆盖0.8~4.0μm近红外区等优点,是一种具有实际应用价值的色心激光工作心。 它的能级结构可用H~+_2模型加以描述。收藏指正
9.Abstract: In this paper,we propose an improved Lagrangian relaxation algorithm to solve job-shop scheduling problems.Besides the addition of augmented objective,we expand the search scope of near-optimal solutions and improve the computational efficiency greatly by restricting the solution scope of sub-problems and modifying the search method of dual problem.At the same time,we develop a genetic algorithm combining with the LR(Lagrangian relaxation)method.Using the numerous useful solutions we get in the Lagrangian relaxation as the original genes,we can improve the solution further.Test results show that these methods achieve satisfied outcome for job-shop problems.They can also be applyed to other programming problems with constraints.
文摘:针对车间调度问题,提出了一种改进的拉氏松弛算法.在增加辅助目标函数的基础上,通过对子问题的限制和搜索策略的改变,使拉氏算法的计算量减少,近优解的搜索能力有很大改善.本文还提出了一种基因优化算法,充分利用拉氏算法得到的多个近优解,进一步优化结果.仿真结果表明对车间调度问题得到了较好的结果.本方法也可用于其它有约束的规划问题.收藏指正
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