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The calculative results show that the efficient thermal conductivity rises as temperature rises under a constant fiber volume fraction, and it is proportional to the third power of absolute temperature; it decreases as fiber volume fraction increases under high temperature; it increases as fiber volume fraction increases under low temperature, and it is in agreement with that is described in the literature.

此式计算结果表明:在纤维体积分率一定时,其有效导热系数随温度的升高而升高,且它是绝对温度的三次方关系;在高温条件下,其有效导热系数随纤维体积分率的升高而四川大学硕土学位论文有减少趋势;在低温条件下,其有效导热系数随纤维体积分率的增大而增大,与所查文献描述规律一致。

The results show that the squeeze viscous force decreases with the slip parameter increases, rigid region of the fluid increases with the slip parameter increases.

结果表明,圆盘上的挤压力随着滑移参数的增加而减小,当流体全部处于流动状态时,即为圆盘挤压牛顿流体时的情况;当流体全部处于刚性状态时,即为圆盘挤压理想刚塑性介质时的情况。

Experiment shows that both the dry plate pressure drop and the wet plate pressure drop increase with the increase of the kinetic energy factor in plate hole but have no influence of the height of cap. The wet plate pressure drop linearly ascends as the clear liquid height increases. Liquid lift-up increases at first then decreases with the increasing of the kinetic energy factor in plate hole, increases with the clear liquid height increasing and the height of cap decreasing, but as the kinetic energy factor in plate hole increased, the influence of height of cap will gradually decreased.

实验表明干板压降、湿板压降均随板孔动能因子的增大而增大,不受罩体高度变化的影响,湿板压降随清液层高度的增大而增大,成正比关系;液体提升量随板孔动能因子的增大先增大后减小,随清液层高度的增大而增大,随罩体高度的增大而减小,但随板孔动能因子的增加,罩体高度的影响逐渐变小;漏液量随板孔动能因子的增大迅速减小,随清液层高度的增大而增大,但接近漏液点时清液层高度的影响不明显。

Under the different sowing seeds way the soil ulmin, the alkaline hydrolysis nitrogen, the fast-acting phosphorus content present the tendency which in 0-40cm various soil layers increases along with the soil layer depth reduces, take 0-10cm soil layer soil content as biggest; The change tendency which the colleague mixes broadcasts mixes with the interlacing broadcasts the change tendency which the lawn fast-acting potassium presents reduces, after the unicast awnless brome lawn presents falls first, increases again falls, take 0-10cm and 20-30cm soil layer soil content as biggest, is 80, and achieves the extremely remarkable difference with other soil layers between; pH presents increases the tendency.

混播草地上牧草根系死亡后,能在土壤中遗留大量的有机质,在土壤微生物的作用下形成土壤腐殖质,其中有丰富的氮、磷、钾等元素。无芒雀麦,又名禾萱草,无芒草,是世界上分布较广,应用较多的优良牧草;是草地补播和建立人工草地的理想草种。无芒雀麦生长快,竞争力强,在杂草较多的草荒地上种植,也能获得成功,为我国温带和寒温带建造人工草地的当家草种。

The addition ofIn significantly increases the overpotential of hydrogen evolution, decreases the corrosion currentdensity, increases Tafel slope 〓 and polarization, decreases Tafel slope 〓 and anode polarization,improves the reversibility of oxidation and reduction reaction, increases 〓 diffusion coefficientand avoids the oversaturation of zincate in electrolyte.

Zn-In合金电极主要是改善了锌电极的抗腐蚀能力和氧化还原反应的可逆性,其在放电容量和循环寿命方面的改善效果并不明显。

From the base to the crown in axial, the vessel-elements proportion increases in fluctuation, contrary to the ray proportion. The fiber proportions in the regions of base and crown are less than that in the trunk of tree, and fluctuate at 65% or so. The parenchym proportion increases quickly to the 1.3m height of tree, reaching the maximum at 9.52%, and then decreases quickly to the 3.3m height of tree (8.90%); afterward it leveled off and increases slightly.

组织比量轴向变异表现为随树高增加导管比量波动性递增,与木射线比量相反;纤维比量在近根区和近冠区稍小,而主干部稍大,并在65%左右波动;轴向薄壁细胞比量先随树高增加急剧增加,到1.3m树高处达最大值(9.52%)后又急剧降低至3.3m树高处的8.90%,以后基本稳定并在波动中略有增加。

In the case of granite, observation results indicate that the extending routes of active cracks are mainly intercrystalline, transcrystalline, inter-transcrystalline, and intracrystalline. When the strain rate is low, the long intercrystalline cracks are prevailing, and with increasing of the strain rate, the short transcrystalline and intracrystalline cracks gradually increase. The statistic results show that the active crack density increases with increasing of the strain rate, and the mean length of active cracks diminishes with increasing of the strain rate, that is, the induced damage in comminuted product increases with increasing of the strain rate. For the first time this dissertation integrates macroscopic results of comminution with active crack growth under impact loading. It elucidates why the dynamic comminution strength of mineral beds increases with increasing of the strain rate through the active crack extending, and analyzes the influence of structure and constitution of minerals on their damage under impact stress. It is authenticated that both the size distribution and the damage population of comminuted product can be characterized by the fractal.

为分析料层颗粒在冲击下的细观损伤效果,采用德国生产的ASM68K半自动图象分析仪对粉碎生成物中的损伤情形进行了观测,以花岗岩为例,观测结果表明花岗岩颗粒在冲击应力下的活化裂纹扩展路径主要表现为沿晶、穿晶、沿穿晶和晶内等形式,在低应变速率下,活化裂纹以沿晶裂纹较多,随着应变速率的提高,其它裂纹形式大量繁衍,统计结果表明活化裂纹密度随着应变速率的增大而增大,活化裂纹的平均长度随着应变速率的增大而减小,综合表现为颗粒的细观损伤程度随着应变速率的增大而增大;首次将应力作用下的活化裂纹演化特征与粉碎的宏观效果相联系,并就料层动态粉碎强度随应变速率增大而提高的现象从裂纹演化特征的角度进行了解释;分析了矿岩构造结构特性对损伤产生和分布的影响。

The element Sb exists in many forms in the film: transpositional atoms and compounds such as Sb2O3, Zn7Sb2O14 etc. ZnO crysal grains grow in mixing directions. The lattice relaxation and content of second phases increase when more Sb is doped. The UVA absorption of doped ZnO thin film obviously increases. The ultraviolet absorption peak narrows, the absorption intensity increases, the absorption margin becomes steep and moves to shorter wavelength about 5 nm, and the visible absorption increases in some sort.

薄膜中Sb以多种形态存在:替位原子和化合物(Sb2O3、Zn7Sb2O14)等,ZnO呈混晶方式生长;随着Sb含量的增加,其引起的晶格畸变和次晶相的含量逐渐增加;掺杂薄膜在远紫外波段的吸收显著增强,UV吸收峰变窄,强度增大,吸收边变得陡峭且向短波方向移动达5nm,在Vis波段的吸收有所增强。

The results indicate that in the synchronizing condition the MRF is unyielded, every point of MRF in the flow field has the same angular velocity. Under the slipping condition, with the increase of magnetic field or the decrease of slip speed, MRF may transfer from whole yield to partial yield. When the MRF wholly yields, the angular velocity of MRF increases nonlinearly with its radius, the non-linear distribution becomes more obvious as the magnetic intensity in the working gap increases. When the MRF partially yields, the yield region expands with the decrease of magnetic intensity or the increase of slip speed and the unyield region always reaches the driven rotor. The transfer torque of MRTD increases with the increase of the external magnetic field, but the transfer torque maintains a constant value approximately with the variation of slip speed at the same magnetic intensity.

研究结果表明,在同步工况下,传动装置流场中磁流变液未屈服,各点角速度相同;在滑差工况下,随外加磁场的增大和滑差转速的减小,磁流变液逐渐从完全屈服向部分屈服转变;磁流变液完全屈服时,磁流变液角速度随半径呈非线性增加,工作间隙中磁场越强,流场的非线性分布越明显;磁流变液部分屈服时屈服区域随外加磁场的增大而减小,随滑差转速的增大而增大,未屈服区与主动转子相连;稳态下磁流变传动装置传递的转矩随外加磁场的增加而近似呈线性增大,但在相同外加磁场下,传递转矩基本不随滑差转速改变而改变,表现出良好的恒转矩特性。

The capacity of single pile will enhance when the length and diameter of pile increases, but effect of pile diameter is more obvious. While pile diameter increases 20、40 and 60 percents, the capacity of pile will enhance 20.4、53.7 and 78.1 percents. And with the effect of mud-cake, the capacity of single bored pile will fall down nearly 20 percents, and pile-side resistance will also reduce 15 — 35 percents. In the centrifuge tests, when the relative displacement between pile and soil was 45 —85mm, which is much more than the criterions, the pile-side resistance will become most. Meanwhile the intenerated value of utmost resistance is close to the resistance in situ. In the pile group tests, the capacity of pile group , which the space among piles increases from 2D to 3D、 4D and 5D , will enhance 6.1、9.6、18 percents .

当桩径增加20%、40%、60%时,桩承载力分别增长了20.4%、53.7%和78.1%;在考虑泥皮效应后单桩侧摩阻力减小15~35%,极限承载力减小18%~24%,且减小率随桩径的增加而变小;试验中桩身侧阻软化值与原型桩实测侧阻软化值接近,且极限侧阻所对应的桩土相对位移试验要比规范值大得多,约为45~85mm;同时群桩极限承载力随桩距的增大而增加,其中桩距为3D、4D、5D的群桩承载力分别比间距为2D的群桩高6.1%、9.6%和18%;其承载力效应系数η接近或大于1,并随着桩间距的增大而不断提高;群桩侧摩阻力沿深度的分布与单桩略有不同,即桩身上部由于承台的作用,侧阻削弱,但桩身中部侧阻具有增加的趋势。

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