气孔的

ZnO, MgO and SiO_2 powders were covered on top of the alloy as dopants, the effects and principles of the dopants were discussed. Based these, SiC particles were made into preforms with different distribution of air holes by changing the granularity of SiC particles and the content of graphite additive, and the oxidation growth of aluminum alloy melt into the air holes within the preform was controlled to prepare SiC/Al_2O_3/Al composite with inerratic shape. And the SiC particles effect principle to the oxidation of SiC/Al2O3/Al composite was studied.

以ZnO，MgO和SiO_2为引发剂，覆盖在合金表面，讨论了引发剂的添加效果和作用机理；在此基础上将α-SiC颗粒制作成为预制体，通过改变SiC的粒度和石墨造孔剂的含量，调整预制体内部的气孔分布，控制铝合金熔体在预制体孔隙内的氧化生长，制备出形状规则的SiC/Al2O3/Al复合材料，同时研究了SiC颗粒的存在对SiC/Al_2O_3/Al复合材料生长机理的影响。

As introduced by relative information, for foreign plants have not solved the joints between over-voltage crosslinked polythene cables so far, the second method should ensure that the crosslinked polythene layer of excessive thickness filled during the later pressed heating sulfuration process has nohuge air hole is produced and left if the thickness extruded at one time is overlarge to 15～30mm during the process of plastic extruding XLPE crosslinked polythene to recover insulation.

第二种方法，据有关资料介绍，由于国外厂家还未解决超高压交联聚乙烯电力电缆的中间接头，在绝缘恢复挤塑XLPE交联聚乙烯的工艺过程中，一次挤出的厚度如果过大，达的时候，要保证填充的过大厚度交联聚乙烯层在后期加压加热硫化工艺中，不产生留存有大的气孔。

Leaves needlelike, slender or stout, straight or twisted, triangular, flabellate-triangular, or semiorbicular in cross section, stomatal lines several, on 1, 2, or all surfaces, vascular bundles 1 or 2, resin canals 2-10 or more, marginal or median, rarely internal, base enclosed by persistent or deciduous, membranous sheath. Pollen cones usually borne in spikelike clusters at base of 1st-year branchlets, sessile, cylindric or ovoid; pollen 2-saccate.

叶针状，纤细的或粗壮，直的或扭曲，三角形，扇形三角形，或半圆形在横断面上，气孔线数个，在1，2上，或全部表面，在第1 年的小枝，无梗，圆筒状的或卵球形的穗状的簇生在基部里的雄球花通常着生；花粉2囊。

The results show that the zirconium sol has good spinnability when n: n= 1:3, reaction time is 6h and aging temperature is 15℃. The ZrO_2precursor fibers are made from hydrous zirconia chelated by acetylacetone. The sintercd fibers arecomposed of metastable tetragonal phase and sized about 15μm in diameter. Moreover, there aremany pores inside the fibers, but no cracks.4. ZrO_2/PVP hybrid fibers were prepared by blending the spinnable zirconium sol and 10 wt%PVP solution.

结果表明，当n(ZrOCl_2·8H_2O)：n(H_2O_2)=1：3，反应时间6h，陈化温度15℃时可得纺丝性能良好的锆溶胶，ZrO_2前驱体连续纤维的组成主要为经乙酰丙酮配位的ZrO_2水合物，热处理后的ZrO_2纤维的相结构为亚稳四方相，纤维的直径为15μm左右，纤维中存在大量的纳米级气孔，但无明显裂纹。4。

Variety widely cultivated in south China,were studied by foliar 1.5 g L-1 CCC application after pot planting virus-free plantlets at the stage of budding.It was found that at the stage of tuber bulking,spraying CCC plays a prominent regulating role in the photosynthesis of Zhongshu 3.The net photosynthetic rate,stomatic conductance,intercellular CO2 concentration and transpiration rate of leaves were superior to those of the control.CCC markedly increased the contents of chlorophyll and carotenoid.CCC significantly increased the leaf photosynthetic productivity and improved economic yield.

品种广泛种植，在中国南方，研究了叶面肥1.5克升- 1 CCC认证申请后，盆栽种植无病毒的植株在阶段budding.it被发现，在阶段的块茎膨胀，喷涂中华基督教会扮演一个突出的调节作用，在光合作用的中枢三，净光合速率（ 1 ），气孔导度的，胞间CO2浓度和蒸腾速率的叶片均优于那些该control.ccc显着增加的内容，叶绿素和carotenoid.ccc显着增加叶片光合生产力，以及改善经济产量。

Especially for the fluid containing sand, cutting may damage the sealing surface 5, soft sealing gate valve of the operating temperature limits by the valve seal material good throttle control when needed (such as control valves or bypass pipe had a small vent), the cut-off valve is the most appropriate valve.

尤其对于含有砂的流体，节流会损坏密封表面 5、软密封闸阀的操作温度受密封材料的限制截止阀当需要好的节流控制（如控制阀的旁通管路或有小的排气孔）时，截止阀是最合适的球阀。

Using high frequency induction brazing and TiZrNiCu filler metal, the shear strengths of the joints were low. The maximum shear strengh was only 102.1MPa, which was lower than the maximum strength of vacuum brazing. The reasons may be that excessive intermetallics, holes and oxidation existed in the joint. So TiZrNiCu filler metal isn't fit for non-vacuum brazing.The stress variation, stress distribution and crack-sensitive regions during the cooling process of brazing have been studied by Marc non-linear software.

采用气体保护高频感应加热、TiZrNiCu钎料钎焊时，接头的强度普遍偏低，最高的剪切强度只有102.1MPa，远远低于辐射加热真空钎焊的强度，其原因是接头中局部生成了过量的金属间化合物，且产生氧化，接头中含有较多的气孔等影响了接头强度，因此可以认为TiZrNiCu钎料不适合在非真空条件下的钎焊。

Where else can you witness such marvels of Mother Nature as a tremendous icecap and several glaciers, spouting geysers and steaming solfataras, volcanoes, raging rivers and magnificent waterfalls, a multitude of birds, cavorting whales just offshore and many other surprises.

在这里，你亲眼见证大自然宛如一个巨大的冰盖，上面冰川嶙峋，高涌的喷泉，蒸发的硫质喷气孔，成群的火山，奔腾的河流，壮观的瀑布，鸟类集群，海面上跳跃的鲸鱼，还有其他想不到的惊喜都在等着你。

The results showed that there were differences between the contents of osmotic regulators and the rate of bound water/free water of three kinds of privets leaves, it was the main reason that affects its anti-cold ability; there were differences among cuticle thickness, stomas density and size of the leaves, it was the main reason that affects its anti-drought ability.

结果表明：三种女贞叶片的渗透调节物质含量和束缚水与自由水的比值存在差异，这是影响其抗低温能力的主要因素；其角质层厚度和气孔密度与大小也有差异，这是影响其抗旱能力的主要因素；女贞的抗低温和抗旱能力均较强，金叶女贞的抗旱能力较差，金边女贞的抗旱能力较强而其抗低温能力较差。

The results showed that net photosynthetic rate P(subscript n, transpiration rate T(subscript r, stomatal conductance G(subscript s, intracellular concentration of CO2 C(subscript i, water use efficiency of cultivars and the light saturation point in leaves of 5 cultivars were different and had obvious differences, and the light compensation point was similar. Diurnal change of net photosynthetic rate among cultivars were different, three cultivars showed twin-peaked curve with an obvious midday-depress, others showed single peak curves.

结果表明：不同品种的净光合速率P(下标 n、蒸腾速率T(下标 r、气孔导度G(下标 s、胞间CO2浓度C(下标 i、水分利用率和光饱和点之间的差异明显，各品种的光补偿点均较低；净光合速率的日变化也存在明显的品种间差异，有3个品种呈&中午降低型&的双峰曲线，2个品种呈单峰曲线。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。