查询词典 bulk density

A field trial for plant density has been used for practical remediation in 2004 and 2005, it has four treatments, 10 cm×10 cm、20 cm×20 cm、10 cm×40 cm and 40 cm×40 cm, respectively. The results were follows: the optimization plant density was 20 cm×20 cm; Peteris vittata L. was a herbaceous plant fit to adequacy increased density for enhancing the biomass and removalling of arsenic; with increased the plant density, the plant were accumulated more proportion arsenic in their fronds, and then made promote the efficiency of arsenic removal from contaminated soils.(2) It was a complicated pyrolysis course for plant incineration.

1在10cm×10cm、20cm×20cm、10cm×40cm与40cm×40cm 4个种植密度下，利用蜈蚣草对砷污染土壤进行了2年的田间实际修复，得出如下结论：蜈蚣草是一种适宜于密植的草本植物，具有通过提高栽培密度来提高其地上部生物产量的潜力；同时蜈蚣草密植有利于促使其吸收的砷向地上部富集，从而有利于进一步提高其对砷污染土壤的修复能力；综合考虑修复过程中的收获方式、经济成本与可操作性，在4个密度处理中密度20cm×20cm为蜈蚣草的最佳栽培密度。

objective to investigate whether hypoxia preconditioning exist in adipose tissue,and construct the hypoxemic model of adipose tissue.methods after injected different density cocl2 to rat's subcutaneously of groin,use immunohistochemical method detect hif-1α protein,and use rt-pcr detect hif-1α mrna.results after injected different density cocl2,the adipose tissue of rat's groin express different degree of hif-1αprotein and hif-1αmrna.,and reach the peak when the density is 20-40 mg/kg and the time is 3 h.conclusion hypoxia preconditioning exist in adipose tissue,and the effect of preconditioning is most evidence when the density is 20-40 mg/kg and the time is 3 h.

目的 探讨脂肪组织中是否存在缺氧预适应现象，构建cocl2致缺氧的缺氧模型。方法不同浓度的cocl2大鼠腹股沟区皮下层浸润注射，分别用免疫组织化学法和rt-pcr法检测该区脂肪hif-1α蛋白和hif-1α mrna的表达情况。结果用不同浓度的cocl2行化学缺氧后在不同时间点观察有不同程度的hif-1α蛋白和hif-1α mrna表达，其中，在浓度为20～40 mg/kg，时间为3 h时脂肪组织中hif-1α表达达高峰。结论脂肪组织存在缺氧预适应现象；cocl2的浓度选择20～40 mg/kg，时间选择3 h时缺氧预适应效果较佳。

The results were as follows the airdried density ( moisture content of wood is 12%), the basic density and the ovendry density were 0.583 g·cm-3, 0.462 g·cm-3 and 0.507 g·cm-3 respectively, the airdried density was at the medium level in domestic wood species;the shrinkage coefficient of radial, tangential and volumetric were 0.099%, 0.183% and 0.296% respectively, the maximum swelling were 4.106%, 7.958% and 12.627% respectively;the ratio of tangential shrinkages to radial shrinkages was 1.5-1.9;the toughness was 52.12 kJ·m-2;the hardness of cross, radial and tangential section were 41.53 MPa, 31.41 MPa and 35.51 MPa respectively;the compressive strength parallel to grain was 44.50 MPa ;the modulus of elasticity in static bending and the bending strength were 12.63GPa and 127.31 MPa respectively;the shearing strength parallel to grain of radial and tangential were 8.76 MPa and 10.54 MPa respectively;the cleavage strength to grain of radial and tangential were 124.3 N·mm-1 and 138.6 N·mm-1 respectively.

结果表明大叶栎木材的气干密度（含水率为12％）、基本密度和全干密度分别为0.583 g·cm-3、0.462 g·cm-3和0.507 g·cm-3，气干密度属于国产木材的中等级水平；径向、弦向和体积干缩系数分别为0.099%、0.183%、0.296%，湿胀率依次为4.106%、7.958%和12.627%，差异干缩为1.5-1.9，其尺寸稳定性较好；冲击韧性为52.12 kJ·m-2，端面、径面和弦面硬度分别为41.53 MPa、31.41 MPa和35.51 MPa，顺纹抗压强度为44.50 MPa，抗弯弹性模量和抗弯强度分别为12.63 GPa和127.31 MPa，径面和弦面顺纹抗剪强度分别为8.76 MPa和10.54 MPa，抗劈强度依次为124.3 N·mm-1和138.6 N·mm-1。

The results were as follows: the air-dried density(moisture content of wood is 12%),the basic density and the oven-dry density were 0.583 g·cm-3,0.462 g·cm-3 and 0.507 g·cm-3 respectively,the air-dried density was at the medium level in domestic wood species;the shrinkage coefficient of radial,tangential and volumetric were 0.099%,0.183% and 0.296% respectively,the maximum s...

结果表明：大叶栎木材的气干密度(含水率为12%)、基本密度和全干密度分别为0.583 g.cm-3、0.462 g.cm-3和0.507 g.cm-3，气干密度属于国产木材的中等级水平；径向、弦向和体积干缩系数分别为0.099%、0.183%、0.296%，湿胀率依次为4.106%、7.958%和12.627%，差异干缩为1.5-1.9，其尺寸稳定性较好；冲击韧性为52.12 kJ.m-2，端面、径面和弦面硬度分别为41.53 MPa、31.41 MPa和35.51 MPa，顺纹抗压强度为44.50 MPa，抗弯弹性模量和抗弯强度分别为12.63 GPa和127.31 MPa，径面和弦面顺纹抗剪强度分别为8.76 MPa和10.54MPa，抗劈强度依次为124.3 N.mm-1和138.6 N.mm-1。

Currently in a surface warship of the our country everyplace all provided with the sail coal gas body to report to the police the instrument on the boat, gas density that sensor adopt to convey gas density value traditional 4-20mA mode of analog signal, have to each measure passway allocate one is it is it report to the police to measure to have and density value show measuring board of function, as the density of gas measures the passway board of the different quantities of different outfit of the figure of the passway, but there is many figure of the large-scale naval vessel passway, so the volume of warning system will become very huge , unfavorable to attenbants to use, and traditional 4-20mA electric current ring transmits the signal, unfavorable to transmitting at a long distance, easy to bring and interfere.

核心提示：摘要目前在我国各地型水面舰船上都配备了航煤气体报警仪，气体浓度传感器采用的是传统的4-20mA模拟信号的模式传送气体浓度值，只好每个检测通道配备一块具有检测报警及浓度值显示功能的检测板，随着气体浓度检测通道数目的不同配备不同数量的通道板，但大型舰船通道的数目比较多，因此报警系统体积会变得十分庞大，不利于操作人员使用，而且传统的4-20mA电流环传输信号，不利于长距离传输，容易带来干扰。为了巡检的需要，需要将其改造成现场智能仪表，通过将传感器检测结果

With analysing the the fatigue mechanism, the general mode of interply fatigue damage propagation is denoted by delamination length and crack density. Based on the power-law, the relationship between number of cycles and delamination length and crack density are established. The specimen is modeled as an equivalent six-ply material system. Starting with the analysis of interply stress, the interply shear stress under cyclic loading is calculated by using nonlinear three-demension FEA. According to the stage regularity of fatigue damage propagation, such models as average strain, effective modulus, ratio of delamination length and crack density, experimental relationship between crack density and effective modulus, are proposed by introducing subsection coefficient.

通过对疲劳机理的分析，确定了以脱层长度和裂纹密度表示的层间疲劳损伤演化的一般模式，利用指数法则建立了脱层长度和裂纹密度随疲劳循环周次变化的关系；从层间应力分析入手，以等效六层的材料模型对循环载荷下的层间剪切应力进行了三维非线性有限元分析；根据疲劳损伤扩展的阶段性，引入分段系数，分别建立了平均应变与载荷循环周次的分段线性模拟模型、有效刚度随载荷循环周次的变化关系模型、裂纹密度变化和脱层长度变化关系随载荷循环周次变化的分段线性模型以及疲劳裂纹密度和有效刚度关系的经验模型。

The results suggested that the exponential variation of volumetric charge density with the bulk electrolyte concentration is more favorable to describe the membrane potential and to evaluate the induced fixed charge density.

结果表明，当体积电荷密度随浓度呈指数变化时，拟合的膜电位与实验结果更接近，得到的固定电荷密度更精确。

Part 3 : determination of water absorption, apparent porosity, apparent relative density and bulk density.

第3部分：吸水率、外表孔隙率、外表相对密度和松密度的测量

In the interior of PP films bulk density is obtained,while density drops off sigmoidally over a distance of ～0.8 nm near the free surfaces.

发现薄膜内部密度等于聚丙烯的本体密度，而离自由表面0.8nm处薄膜的密度开始跌落。

The thin layer of microbiotic crusts with lower bulk density, lower density, higher soil porosity and higher water-holding capacity will markedly influence the soil hydrological processes, such as the processes of penetration, the interception, the redistribution and the evaporation of precipitation, which will threat the soil-water environment in Shapotou area.

容重较小、比重低、孔隙度高和持水性能强的薄层微生物结皮对土壤水文过程产生了深刻的影响。在沙坡头地区，微生物结皮改变了降雨在沙丘土壤中的渗透、再分配、拦截和蒸发等过程，并最终导致固定沙丘土壤水环境的恶化。

This matter overthrew all basises I learned from Sunday school .

这件事把我从周日学校学到的所有道理都颠覆了。

It's one of the cruel ironies of aging: if you want to remember your favorite restaurants, the less you should eat at them.

这是一个老化的残酷讽刺：如果你想记住你最喜欢的餐馆，你应该更少吃到它们。