查询词典 bulk density

This article indicates that when the average temperature of gas in gas-insulated electric equipment is some greater than the temperature of gas density relay then the gas density relay can't reflex the gas density correctly too and gives a positive error.

本文指出，当电气设备内气体平均温度高于密度继电器温度一定程度时，气体密度继电器也不能正确反映电气设备内的气体密度，而出现正误差。

The rusults indicated that the temperature in forest was lower and the growth of ginseng was slower than out of forest, the yields were also lower; with the increase of ginseng age, the rate of net photosynthesis became higher; when the canopy density of forest reached to about 0.7～0.8, the net photosynthesis, hight, root weight, transpiration,chlorophyll conten of ginseng were higher than others, indicating that both lower and higher canopy density would reduce the rate of net photosynthesis of ginseng, and that the canpoy density of stand could be adjusted to satisfy the temperature and lighting for ginseng, and to provide the optimum ecology enviorment for the growth of ginseng.

结果表明，在生长季节内，林内温度低于林外温度，林下人参生长发育较差，产量较低；林分郁闭度为0.7~0.8时，人参的净光合速率、株高、单根重、叶绿素含量等指标较高；而郁闭度过高或过低都会影响人参生长发育；随着人参年龄的增加，净光合速率有逐渐升高的趋势。通过人为调节林分郁闭度的方式来满足人参对温度和光照因子的需求，为林下人参生长发育提供最适宜的生态环境。

The laryngeal lymphatic system is characterized by regional differences in lymphatics density with the highest density in the larynx surface of epiglottis and lowest density in the vocal folds.

喉各分区淋巴管分布具有显著差异，其中以会厌喉面分布密度最高，声襞淋巴管的分布密度最低。

At equilibrium,the rate of the metal dissolution is equal to the rate of the cathodic reaction,and the rate of the reaction is directly proportional to the current density by Faradar's law ;therefore:（6）and the Nernst equation can be rewritten(7)where B is a constant and i0 is the exchange current density,which is defined as the anodiccurrent density at the standard electrode potential.

在平衡，金属溶解的率与负极反应的率是相等的，并且反应的率与电流密度直接地是比例由Faradar的法律；因此：(6)和能斯脱等式可以被重写(7) B是常数的地方，并且i0是交换电流密度，被定义作为正极电流密度在标准电极电位。

The main research work of this dissertation is as follows: Based on the chemical reaction engineering theory and the nitrobenzene electroreduction mechanism, the plate and frame electrolyzer was designed and applied to the process of electroreduction nitrobenzene to p-aminophenol. This dissertation measured the residence time distribution data of the electrolyzer by means of the pulse response method and studied the rule of flow pattern along with the current capacity change. Under different conditions ,this dissertation studied the cyclic voltammetry properties of nitrobenzene on different electrodes by means of the dynamic cyclic voltammetry method and the electrode materials applied to the NB electroreduction have been selected primarily.Baseed on the results of cyclic voltammetry tests, this dissertation used p-electrode systems to measure the steady-state- polarization curves of nitrobenzene on different electrodes in H-type diaphragm cell, and obtained each primary factor s influence rule and the exchange current density value of each electrode.And then on the basis of the conclusions of fundamental researchs upword, the effects of influence factors on the the yield of p-aminophenol and the current efficiency,such as electrode material, current density, quantity of electricity circulated, nitrobenzene concentration . sulpuric acid concentration and so on, have been studied in detail in the systems of hign temperature , strong acidity and oxygen-poorthrough a series of electrolysis experiments in this paper.After all using Pb as anode Monel metal as cathode Dupont Nafion 417 cation-exchange membrane as membrane, this dissertation obtained the optimum technological condition: reaction temperature about 85C, current density 500A m-2, sulphuric acid concentration 20%wt.

论文的主要研究工作为：运用化学反应工程理论，结合硝基苯的电还原机理，设计出用于硝基苯直接电还原合成对氨基苯酚实验的板框式电解槽，并利用脉冲响应法测定了该板框式电解槽的停留时间分布数据，研究了流型随流量变化的规律；通过动态循环伏安法研究了硝基苯在不同电极上、不同条件下的循环伏安特性，初步评选出了用于硝基苯电还原的电极材料；结合循环伏安的测定结果，在H型隔膜电解槽中采用三电极体系测定了硝基苯在不同电极上、不同条件下的稳态极化曲线，得到了各主要因素的影响规律及硝基苯在各个电极上电还原的交换电流密度数值；在基础研究结论指导下，采用板框式电解槽，在高温、强酸、贫氧系统中，进行了一系列的电解实验，分别考察了电极材料、电流密度、通电量、硝基苯浓度、硫酸浓度等因素对收率及电流效率的影响，最终选择以蒙乃尔合金电极作为阴极、铅合金为阳极、Dupont Nofion 417阳离子交换膜为隔膜，得到由硝基苯直接电还原制对氨基苯酚的最佳电解工艺条件：反应温度85℃，电流密度500A·m~(-2)，硫酸浓度20％wt。

To improve the purple soil storage capacity, to prevent soil erosion in hunan province, the choice of HengYangXian 20o purple soil slope, setting Guan waste land, grassland, natural forest and grassland and agrimony slight composite 4 processing, the water treatment performance and its mechanism, and the results show that, compared to the purple soil LuoDe HuangShanPo ground implement agrimony and three-dimensional planting trees for 1-2 years later, reduce soil bulk density 0.10 g/cm3 0.09 ~, soil porosity, permeability of soil moisture 14.01% increase rate increase 2.20 ~ 2.29 times.

为提高紫色土蓄水能力，防止水土流失，在湖南省衡阳县选择20o 左右的紫色土荒山坡地，设置祼地、自然草地、龙须草地和龙须草与林地复合4 个处理，比较分析各处理贮水性能及其改良机理。结果表明，与裸地相比，在紫色土荒山坡地上实行龙须草与林木立体种植1～2 年后，土壤容重降低0.09～0.10g/cm3，土壤总孔隙度增加14.01%，土壤水分渗透速率提高2.20～2.29 倍。

Based on the applied situation of deploying the air jamming corridor, the formation scenario and diffusion model of the chaff curtain wall is established, and the related parameters, length, width, thickness, drift velocity, bulk density, and tropism of the chaff, are described quantificationally.

在此基础上，依据布撒空中干扰走廊的应用实况，给出了箔条幕墙的生成想定与扩散模型，并对幕墙的长度、宽度、厚度、漂移速度、体密度及幕内箔条取向予以定量描述。

Results show that:(1) For each particle size of andalusite, variation tendency of the properties of the material is generally the same: the maximum of bulk density, compressive strength and rupture strength appears in the range of 5%-10% content of fiber, these properties of the material remarkably decrease as the fiber content exceed 10%; while at the same fiber content, the properties of the material increase with the increase of firing temperature.

结果表明：(1)对于不同粒度的原料，性能变化规律大致相同：在同一烧成温度下，体积密度、常温耐压强度、常温抗折强度在5％～10％之间出现峰值，加入量超过10％之后材料的性能明显下降；在相同的纤维含量下，随着烧成温度的提高，试样的各项性能均有所上升。

Under contented the used intensity,the anorthite ceramic substrate which prepared with pyrophyllite at low-sintering temperature has small dielectric constant,good dielectric property which compared with common aluminum substrate,the anorthite ceramic substrate has light bulk density,which is advantage to reduc.

研究了用叶蜡石、碳酸钙与适量的氧化铝，在加入添加剂的条件下，用原位反应烧结法制备出低温烧结( 12 0 0℃)的新型钙长石质陶瓷基片材料。

The results show that: the fillers of SiO_2 based investment consist of SiO_2,Al_2O_3 and MgO,and the binder is NH_4H_2PO_4;for SiO_2 based investment,the bulk density and the compression strength decrease,the apparent porosity and the thermal expansion increase,when the specimens are heated to 900 ℃;the fil.

结果表明：氧化硅系包埋料的骨料是氧化硅、氧化铝、氧化镁，结合剂为磷酸二氢铵，其900℃煅烧后显气孔率增加，体积密度下降，耐压强度降低，热膨胀增大；氧化铝系包埋料的骨料是氧化铝和氧化镁，结合剂为磷酸二氢铵，其900℃烧后显气孔率增加，体积密度下降，热膨胀变化不大；氧化镁系包埋料的骨料是氧化镁和氧化铝，结合剂是铝酸钙水泥，其900℃烧后耐压强度明显降低，热膨胀明显增大。

The quality of both red and white wine depends very much on the wine maker talent and on the quality of the grapes.

他的红酒和白酒的品质，根据酿造者的能力和葡萄的质量，各有差异。

No, I don't want to get drunk before my next match.

" "不，我不想让我的下一场比赛前喝醉了。