查询词典 low-pressure

Meanwhile, the concentration of Pb,Zn and other heavy metals is rather high in the oxidation zone and decreasesdownward to levels that are unbelievably low for Pb-Zn mine tailings. Theseobservations suggest that heavy metals should be re-immobilized by secondaryminerals, rather than primary minerals, in the oxidation zone, and could be leachedout from suboxic environment due to low rate oxidative dissolution which preventsthe precipitation of secondary minerals in significant amount. Thus, cover scenarioswhich establish a suboxic environment beneath the cover layer might not always beeffective in preventing heavy metal release from mine tailings.Sequential extraction studies indicate that, in addition to heavy metal leaching,oxidation of the mine tailings increased the mobility of residual Zn, and Cu, while Pb remains immobile due to the formation of anglesite (PbSO4). Using the seven-step extraction technique developed by Dold (J. Geochem. Explor., 2003, 80: 55-68), galena dissolves in significant amount at step 2 most probably due to the strong complexing of Pb2+ by acetate, while other metal sulfides dissolve at step 6, which suggest that this extraction technique could not be used to evaluate the mobility of lead in natural environment

重金属含量均低于新鲜尾矿，但以硬化层中的含量最高(Pb、Zn含量分别为0.47%和0.93%)，往下大幅度降低，表明尾矿风化过程中形成的次生矿物对Pb、Zn等重金属元素有较强的固定作用，而次氧化带的淋溶作用造成了金属元素的大量流失；(4)与新鲜尾矿相比，硬化层中铅的可迁移性大大降低，硬化层之下尾矿样品中铅的可迁移性也不同程度降低，这是由于硫化物氧化产生的硫酸根与尾矿中的铅反应形成铅矾(PbSO_4)的缘故；(5)氧化作用使尾矿中的zn、Cu等重金属的可迁移性不同程度地增大，其中对锌的可迁移性影响最大，铜的可迁移性与铁比较相似，铅则容易与硫化物氧化形成的SO_4~(2-)反应形成铅矾(PbSO_4)；(6)为了减少尾矿污染和修复矿山环境，人们提出了各种不同的尾矿覆盖方案，本文的研究结果表明，这些方法不一定能够有效地阻滞污染元素的迁移。

Moreover, aiming at the complex geological characteristics such as the heterogeneity and anisotropism, etc. of low-resistivity oil/gas reservoirs, the statistics model method and artificial neural network model method are introduced in the low resistivity oil/gas reservoir interpretation and evaluation for the first time.

另外，针对各种低电阻率油气储集层的非均质性和各向异性等复杂地质特征，第一次把统计模型方法和人工神经网络模型方法引入到了低电阻率油气储集层解释与评价之中，并建立起了一套相应的测井解释与评价方法。

Data of body of fluid wrap up reveals those who give this bed to be a model is medium antimonial bed of low tepid fluid, its are into mine fluid in microtherm, low salinity, medium density heats up fluid.

流体包裹体资料揭示出该矿床为典型的中低温热液锑矿床，其成矿流体为中低温、低盐度、中等密度热液。

Owing to many advantages, such as high aperture ratio, high resolution, low cost and low power consumption, LCOS display becomes a promising display technology in recent years.

LCOS技术以高开口率、高分辨率、低价格和低能耗等优点成为近些年最具发展潜力的显示技术。

Owing to many advantages, such as high aperture ratio, high resolution, low cost and low power consumption, LCOS display becomes a...

LCOS技术以高开口率、高分辨率、低价格和低能耗等优点成为近些年最具发展潜力的显示技术。

The main lithology is lithic arkose and the average porosity of reservoir is 8.21%, the average permeability is 0.256×10-3μm2, and the reservoir belongs to low porosity ultra-low permeability, slender throat-micro throat reservoir.

储层的岩石类型为岩屑长石砂岩，储层平均孔隙度为8.21%、平均渗透率为0.256×10-3μm2，属于低孔特低渗、细喉～微喉型储层。

Stepping motor is applied to fuze safety and arming system as a low power motor at low frequency.

步进电机在引信安全系统中是一种小功率的低频应用。

Time is very, very much so-called period of market information is very low, very low confidence, the stabilization fund is the very means for the sake of the mayor's arraignment, to correct the pricing error.

时间是非常非常所谓的市场信息是非常低的时期，非常低的信心，稳定基金是非常手段对市长的传讯为了纠正错误的定价。

We have investigated the Suzuki cross-coupling reaction of aryl bromides at low catalyst loading and low temperature.

经过一系列实验条件的摸索，采取了在比较低的催化剂用量和比较低的温度的实验条件下进行了一系列底物的Suzuki偶联反应，结果以极好的收率得到相应的偶联产物。

Existing prominent issue is as far as my department be concerned , at present: The notion falls behind , management system is obsolete , control level is low , project profit is not taller than , the staff and worker living standard is partial to low grade.

就我司而言，目前存在的突出问题是：思想观念落后，经营机制陈旧，管理水平低下，工程利润不高，职工生活水平偏低等。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。