查询词典 yield capacity

Based on the results, there is an increase in total emergy input from 1.126×10^22 to 1.661×10^22 seja(-1), with an ob-served increase in total emergy output from 5.002×10^20 to 1.383×10^22 seja^(-1) for 1952~2005. Ecological function potential drops from 54.08% to 37.02% and the basic population capacity increases from 199 400 to 315 100. Emergy self-support ratio drops from 74.58% to 54.13%, while emergy investment ratio increases from 34.0% to 85.0%. Emergy density increases from 1.34×10^11 to 1.97 ×10^11 sejm^(-2) and emergy/money ratio decreases from 4.93×10^14 to 1.81×10^13 sej$^(-1). There is an increase in environment load ratio and net energy yield ratio from 0.85 to 1.70 and from 0.18 to 1.82 respectively.

结果表明，1952~2005年期间，阿坝州农业生态系统总能值投入从1.126×10^22 seja^(-1)增加到1.661×10^22 seja^(-1)，总能值产出从5.002×10^20 seja^(-1)增加到1.383×10^22 seja^(-1)，生态功能潜力从54.08%下降到37.02%，人口基本承载力从19.94万人增加到31.51万人，能值自给率从74.58%下降到54.13%，能值投资率从34.0%上升到85.0%，能值密度从1.34×10^11 sejm^(-2)上升到1.97×10^11 sejm^(-2)，能值货币比率从4.93×10^14 sej$(-1)降低到1.81×10^13 sej$(-1)，环境负荷率从0.85上升到1.70，净能值产出率从0.18上升到1.82，可持续发展指数从0.20增加到1.07。

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。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。