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Planar Archimedean antenna has some advantages as wideband,small volume and good performance in circularly polarizing ,so it has broad appliance prosperity.

平面螺旋宽带天线具有频带较宽、体积较小、圆极化性能较好等特点,应用范围很广。

The percentage of Cyanide, phenol, mercury and chromium which have little effect on water quality is small and the variation tendency is slow. The percentage of Ammoniac azote, TP, TN, Cd, potassium permanganate index and fluoride which have much effect on water quality is big and the variation tendency is great. The percentage of DO, BOD5, petrochemical compounds and lead lies in the mean place between two guidelines above, which plays a normal role in contributing to the water quality of Yuehai, but the variation tendency is obvious.

选取了15个参数作为评价因素,其中,氰化物、挥发酚、汞、六价铬等指标的权重较小,对水质变化的总体影响不大,并且年度变化趋势较平缓;氨氮、总磷、总氮、镉、高锰酸盐指数以及氟化物等指标在阅海湿地水质总体评价中所占比重较大,直接影响水道水质;DO、BOD5、石油类、铅等指标的权重介于上述指标的中间。

Such as angle grinder, wire brush, needle beam pneumatic rust, and wind knock rust hammers, gear-type rotary rust, etc., are semi-mechanized equipment, tools, light, mobility, and to more thoroughly to rust , old coatings, the coating can be played on the shelf hair treatment, significantly more efficient than manual derusting increased up to 1 ~ 2m2 / h, but can not remove the oxide skin, the smaller surface roughness and can not achieve high-quality surface to deal with quality, ergonomic handle lower than the jet.

如角向磨光机、钢丝刷、风动针束除锈器、风动敲锈锤、齿型旋转除锈器等,属于半机械化设备,工具轻巧、机动性大,能较彻底去除锈、旧涂层等,能对货架涂层进行打毛处理,效率比手工除锈大大提高,可达1~2m2/h,但不能除去氧化皮,表面粗糙度较小,不能达到优质的表面处理质量,工效较喷射处理低。

The rotational jet and local oxygen enrichment can improve the mixing of oxygen and pulverized coal, but the effect of coal injection is weak on the whole flow field in blowpipe. The mass and momentum transfer near the exit of lance are very strong.

结果表明,氧-煤喷枪的漩流、富氧率等仅在氧枪出口的有限区域内对流场有较大的影响;喷煤对整个直吹管内的流场影响较小,但在氧-煤喷枪出口附近区域会促使气相和煤粉激烈混合,动量和质量传输较强烈。

The results indicate that as the value of fractal dimension is increased, the interfacial static friction coefficient first increases and then decreases; the interfacial static friction coefficient decreases as the fractal roughness parameter increases; while the inter-facial static friction coefficient increases as the material property or total normal load increases; the curve of static friction coefficient versus dimensionless total normal load is convex when the fractal dimension becomes smaller or fractal roughness parameter is larger or material property becomes smaller.

研究结果表明:界面的静摩擦因数首先随分形维数的增加而增加,然后随分形维数的增加而减小;界面的静摩擦因数随分形粗糙度参数的增加而减小,但随材料特性的增加而增加,也随总法向载荷的增加而增加;当分形维数较小或分形粗糙度参数较大或材料特性较小时,静摩擦因数-量纲一的总法向载荷曲线为凸弧。

The effects of artificial viscosity coefficient and mesh density on simulation results were discussed. The larger artificial viscosity coefficients and coarser meshes can smear off peak pressure of shock wave severely, but affect impulse little.

讨论了人工粘性、网格密度对计算结果的影响:较大的人工粘性系数和较粗的网格会严重抹平冲击波峰值压力,但对冲量影响较小

And the upper neck force was affected by the contact force and the head inertial force.

假人模型的上颈部所受剪力和拉力均较大,而儿童人体有限元模型的上颈部剪力较小,拉力较大。

The results indicate that the weak election-withdrawing group 4-hydroxymethyl in 4-position of pyridine in 4-HMDPA could weaken the fluorescence intensity of the lanthanide complexes. The contradistinctive experimental results show that the fluorescence intensities of these complexes are related to pH value of the aqueous solution and the dipole moment of solvent molecule: in the neutral aqueous solution,the fluorescence intensities of these complexes were strongest,while the less the dipole moment was,the stronger the fluorescence intensity was.

结果表明,在吡啶4位引入弱吸电子基团4-羟甲基会减弱稀土配合物的荧光强度;在水溶液中稀土配合物与溶液的pH值有着密切的关联,中性水溶液中荧光强度较大;分子偶极矩较小的溶剂中稀土配合物荧光强度较强。

On IOPO,for high-power pumped KTP OPO in Nd:YAG laser(Q-switching and Xe-lamp pumped)cavity,convert efficiency up to 45% is measuredfor both linear and T-shape structure with various cavity mirrors.

脉冲宽度太宽,泵浦功率密度上升的较慢,参量光的增益较小,信号光建立时间就会被延迟,也不会获得较高的转换效率。

It is shown that in complex system like L-tyrosine, using a locally dense basis set with a large number of atomic basis functions for the carbon atom of interest and smaller sets of atomic functions for the other atoms can not only save the disk capacity and computing time but also produce satisfactory results.

由从头计算获得的结果与实验值符合较好,说明对于具有复杂结构的多原子体系,对杂原子使用较小的基函数,而对所关心的碳原子使用较大的基函数以提高计算精度,这样可以达到既节省计算机空间与计算时间而不影响计算精度的目的。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。