Aiming at hydronic road snow-melting systems based on renewable energy including solar and geothermal energy, the behavior of heat and mass transfer during the snow-melting process is studied theoretically and experimentally in the present work, which can be taken as references for system design and large-scale applications in future.

本文以基于太陽能、地?zé)崮艿瓤稍偕鸁嵩吹牧黧w加熱道路融雪系統(tǒng)為研究對象黄片mmm播放，主要針對融雪過程中的有關(guān)傳熱傳質(zhì)過程展開了一系列基礎(chǔ)理論與實(shí)驗(yàn)研究欧美日韩精品久久久久久，為進(jìn)一步優(yōu)化設(shè)計(jì)與規(guī)模化應(yīng)用提供了指導(dǎo)依據(jù)人人摸人人干。

And snow-melting of turnout is heated by sleeper and turnout snow-melting heating transformer.

道岔融雪分別由軌枕和道岔融雪加熱變壓器實(shí)施加熱97人人操网站。

Deicing chemicals are widely used to clear the pavement snow in the cold areas of China and many other countries, because of their simple operation, low price, and excellent snow-melting effect.

化學(xué)融雪劑用于清除道路積雪具有操作簡便、價格低廉及融雪效果良好等優(yōu)點(diǎn)99r视频国产在线观看免费，在國內(nèi)外的寒冷地區(qū)應(yīng)用廣泛人人操V潮。

The intensity of cold air activities in winter and the snow-melting status in the next spring in 2000-2005 over Northeast China are analyzed using the snow-cover data set obtained in this paper.

依照積雪覆蓋的時間序列圖及分布圖分析了各年份冬季冷空氣強(qiáng)度及變化和次年春季融雪狀況。

Soil analysis and site investigation were conducted, and the results showed that the salts content of the snow-melting agent-applied remained in snowmelt and soil were far higher than that in check samples, so it was deduced that the reasons which caused lots of avenue trees and fence plants died in Beijing city were the plants have been injured by salt for too much snow-melting agent being used.

通過現(xiàn)場調(diào)查和對土壤化驗(yàn)分析表明69操碰人操女人色，撒施了融雪劑的雪水和樹埯內(nèi)土壤中的鹽分和Cl-含量遠(yuǎn)遠(yuǎn)大于對照雪水和土壤99热在线观看精品免费，由此認(rèn)為造成2003年北京城市大量行道樹和灌木死亡的原因是由于融雪劑使用過多，使植株發(fā)生了嚴(yán)重鹽害所致黑人黄色网站。

Through studying the coupling effect of press-sensing response and thermal-electric performance, we developed the experimental and theoretic methods to supervise the temperature of concrete road surface online, and proposed a low energy-concuming snow-melting and deicing intellective control scheme. Therefore, the complete method for temperature self-diagnosis and snow-melting and deicing self-adapting control was developed.

通過研究壓敏感應(yīng)和熱電功能之間的耦合效應(yīng)jizzjizz日本在线，建立了進(jìn)行混凝土路面溫度在線監(jiān)測的實(shí)驗(yàn)與理論方法，提出了一種低能耗的融雪化冰的智能控制方案精品视频小说图片在线观看，建立了一種CFRC混凝土材料在路面結(jié)構(gòu)的優(yōu)化鋪設(shè)條件下溫度自診斷與融雪化冰自適應(yīng)實(shí)驗(yàn)與方法欧美指交视频在线观看。

Using Brian ADI algorithm, the model is solved numerically and a snow-melting simulation program is developed based on the compiler of Visual Basic. This program can output some important results including the pavement temperature field, the height of snow layers, the height of liquid film and the idling characteristic curve.

通過Brian ADI格式算法，對上述模型進(jìn)行數(shù)值求解黄片视频吗，并基于Visual Basic平臺a无码毛片免费视频，開發(fā)了一個通用型的道路融雪模擬分析軟件，可輸出路面溫度場欧美激情黑人、雪層厚度aa美国一级性爱片、液膜厚度以及路面待融特征曲線等重要結(jié)果。

Exploring a new technology for snow-melting and deicing of airports tracks is the research background of this project. Through a great amount of experiments, numerical value calculation and theory analysis, a great deal of experiment data are attained, and the resonance law of carbon-fiber reinforced concrete under various power and ice-layer thickness conditions was found.A low-energy concuming, low cost and high thermal effect CFRC road surface concrete structurel material was developed. The snow-melting and deicing mechanism of CFRC was analyzed in the point of view of energy conservation, and the electric-thermal resonance law of road surface structural materials to CFRC concrete materials was set up.

本項(xiàng)目以新型機(jī)場跑道的冬季融雪化冰為研究背景，通過大量實(shí)驗(yàn)欧美精品极品高清免费、數(shù)值計(jì)算與理論分析日韩精品中文国产字幕，獲得了碳纖維增強(qiáng)機(jī)敏混凝土在不同功率、不同冰層厚度下的響應(yīng)規(guī)律和大量試驗(yàn)數(shù)據(jù)91足交在线，找到了一種能耗低aaaaaa级黄片、熱效高、成本低的CFRC路面混凝土結(jié)構(gòu)材料欧美激情性爱视频小说，并從能量守恒的角度分析了CFRC混凝土融雪化冰機(jī)理h色网站在，建立了研究路面結(jié)構(gòu)材料的導(dǎo)熱性能對CRFC混凝土材料的電熱響應(yīng)規(guī)律。

The scant Indian path through this range filled with snow as the Corps of Discovery struggled through the treacherous terrain, and small avalanches fell on the men as they brushed against snow-laden pines.

貫穿山脈的印第安小路被冰雪覆蓋海外黄色视频，（路易斯和克拉克探險(xiǎn)隊(duì)努力穿過這個危險(xiǎn)地帶激情一级片，當(dāng)他們推開滿是積雪的松樹時，一場小規(guī)模的雪崩落在了他們身上视频一区二区公开。

The roller is the important components of this design, and it's size is directly related to snow-clearing efficiency. The size and the distribution arrangement of the blades are strictly requested, because they can guarantee snow efficient, and similarly also affects the organization stability.

磙子是此次設(shè)計(jì)的重要部件色黄乱婬伦免费网站耙，其大小直接關(guān)系到清雪的效率，而其上刀片的尺寸黄片一区二区三区、分布排列嚴(yán)格的要求，因?yàn)檫@些是保證清雪效果的重要參數(shù)18网站黄色入口，同樣也影響到機(jī)構(gòu)的穩(wěn)定性日韩一级啪啪。