可降低的

The soil cutting experiment indicates that the interior friction angle and the shear intensity of soil is reduced;and the maximum principal stress is decreased due to the vibration load;it induces the decrease of digging resistance.

从理论上研究了振动掘削岩土的减阻机理，土壤剪切试验结果表明，振动载荷能够使土壤的内摩擦角变小、抗剪强度下降、最大主应力值减小，从而导致挖掘阻力降低；对土壤在静态载荷和振动载荷作用下的失效过程进行了对比仿真实验研究，可知土壤在振动加载的条件下强度显著下降，并提前于相同条件的静态加载而破坏，同时跟踪X方向的载荷发现，振动掘削最大掘削阻力可降低50%。

It was found that both the conversion and the initiating efficiency of methyl methacrylate polymerization system were decreased in the presence of small amounts of addition inhibitions 2,4,6-trinitrophenol or Benzoquinone, the system exhibited some retardation characteristics; at the same time, the molecular weights of obtained polymers was small and the molecular weight distributions was narrow, it was suggested that this polymerization system exhibited some ""living""/controlled radical polymerization characteristics.

发现在甲基丙烯酸甲酯的普通自由基聚合体系中加入少量的加成型阻聚剂2，4，6-三硝基苯酚或1，4-苯醌时，体系转化率降低，引发效率降低，呈现出一定的缓聚性质：同时得到的聚合物分子量变小，分子量分布变窄，具有一定的&活性&/可控的特征。

Meanwhile application of external re-circulation to calcining enhanced the thermal stability of calciner system. The required operating temperature inside a calciner may drop 30～ 50 ℃ by increasing recirculation ratio of 100％.

外循环方案有助于改善分解炉的热稳定性并降低分解炉的操作温度；在终分解率不变的情况下，物料循环率每增加100％，分解炉的操作温度可降低30～50℃。

As a result these types of fibre not only keep their own fine traits,but also own good conglomerating structure ,crystal limit ,calorifics performance and mechanics performance. Compared with the ordinary fiber ,the neatness of high-contracted polyester fiber increases and it s diameter also increases.

在力学分析方面：我们得到阳离子可染的涤纶纤维的于态断裂比强度较一般涤纶棉纤维的有所降低，断裂伸长反而上升：高收缩涤纶棉纤维干湿态的断裂强力和断裂伸长都较一般涤纶棉纤维的有所降低。

It is concluded that the ultrafiltration preconcentration combining with multieffect evaporation is a promising concentration procedure for straw black liquor, which can not only reduce the concentration costs, but also improve the subsequent evaporation and combustion operation due to the desilicification and purification of ultrafiltration.

两种膜比较，磺化聚砜膜更易清洗，而且水通量大。5）超滤浓缩后，黑液中木素的浓度和纯度大大提高，超滤是从黑液中分离木素的理想方法。6）与多效蒸发相比，用超滤法浓缩麦草黑液可降低能耗70~85%，若用于黑液的预浓缩，再结合多效蒸发，不仅可以降低黑液的浓缩费用，而且由于除硅和纯化作用，会大大改善后继的蒸发和燃烧的操作。

Some factors to influence the silicon content of hot metal were proposed on the basis of the experiment in the lab: increasing the binary basicity is favorable to desiliconization; the oxide in slag debases the silicon activity and is of great advantage to desiliconization; Al2O3 and SiO2 are disadvantageous to desiliconization, the volatilization content of SiO2 in coke increases with increasing smelting temperature, leading to increase the silicon content of hot metal; the silicon content of hot metal increases with increasing the drip zone's altitude.

在实验室进行了降低铁水中硅含量的实验，得到了铁水中硅含量的影响因素：提高二元碱度有利于降硅；增加渣中氧化物可降低SiO2的活度有利于降硅；Al2O3和SiO2不利于降硅；冶炼时焦炭中SiO2的挥发量随温度的升高而增多，使铁水中硅含量增加；随着滴落带高度的增加，铁水中硅含量不断增加。

At first,ecological mat can effectively reduce soil temperature of the soil layer from 0 cm to 15 cm,in detailed,the average daily soil temperature can decrease 2.06℃ to 4.56℃,which is benefit to reduce soil evaporation in high temperature;During the rainless period,the soil moisture content covered by ecological mat is much higher than mobile sand,especially,the soil moisture content of the layer form 0 cm to 15 cm always keep ...

首先生态垫能够显著降低沙地0~15 cm的土壤温度，日均温可降低2.06~4.56℃，有利于沙地高温条件下减少土壤蒸发；在连续无降雨的情况下，生态垫下各层次的土壤含水量都高于流动沙丘裸地，尤其是15~30 cm含水量相对稳定，人工植被建立后，其保存率、生长量较流动沙地均有较大幅度的提高。

Though the comparison between the experimental group and the control group, it was proved that planting Tamarix chinensis on the saline soil not only could increase the number of the soil micro-organisms, but also could increase the volume of air, the content of organic matter, and lower the pH value, increase in ornamental.

通过将实验组与对照组的比较，分析得出在滨海盐渍土上栽植柽柳不但可增加土壤中微生物的含量，而且可增加土壤中的空气和有机质的含量，提高土壤颗粒的贮水能力，还可降低土壤的pH值，增加观赏性。

Medium added inhibitor, could slow down the corrosion of equipment and valves, such as chrome-nickel stainless steel in sulfuric acid containing no oxygen, the great state of cremation within the range of solubility, corrosion more serious, but a small amount of copper sulfate or nitric acid and other oxidants, can change the passive stainless steel surface generates a layer of protective film to prevent the medium of etching, in hydrochloric acid, if a small amount of oxidant, which reduces the corrosion of titanium.

介质中添加缓蚀剂，可使设备和阀门的腐蚀减缓，如铬镍不锈钢在不含氧的硫酸中，很大的溶度范围内成火化态，腐蚀较严重，但加入少量硫酸铜或硝酸等氧化剂，可使不锈钢转变钝态，表面生成一层保护膜，阻止介质的的浸蚀，在盐酸中，如果加入少量氧化剂，可降低对钛的腐蚀。

Electric potential waveshapes of tower body and crossarms were presented by EMTP, also voltage waveshape between upper or lower crossarms and any given phase conductors.

分析结果表明，在高杆塔情况下，降低冲击接地电阻对耐雷性能的改善效果不大；在中横担外侧加设辐合地线和上横担中部增设避雷线以及适当调整导线与上下横担之间空气间隙的距离可有效的改善输电线路的耐雷性能；在条件允许的情况下，建议降低杆塔高度。

The big eared hedgehog, the little owl, the sand gecko, the three-toed jerboa, and every show needs a villain - saw-scale - the viper!

大耳刺猬，小猫头鹰，沙壁虎，三趾跳鼠，每场戏都需要反派角色：蝰蛇。

Plasmodiophora brassicae ; resting spores ; density gradient centrifugation of sucrose ; ultrasonic disruption

根肿；休眠孢子；蔗糖密度梯度离心；超声波破碎