We analyzed and discussed the characteristics of cycle of carbon and water,and after having obtained important physiological parameters based on field experiment,a process-based, multilayer two-leaf model which calculates energy and material cycle separately for sunlit and shaded leaves was developed,then characteristic of CO_2 fluxes above the canopy was simulated.The main results are as follows:1.Characteristics of carbon and water cycle in the relationship of leaf photosynthesis -stomatal conductance-transpiration.

本研究以冬小麥為研究對(duì)象，利用LI-6400R光合—蒸騰測(cè)量系統(tǒng)黄色视频三级片AAAAAAAAA、LI-6400-09土壤呼吸室和禹城生態(tài)試驗(yàn)站渦度相關(guān)系統(tǒng)等高精度儀器設(shè)備，對(duì)2007年和2008年小麥拔節(jié)至乳熟期間涉及碳、水循環(huán)過(guò)程的葉片光合—蒸騰作用女被男啪出水免费的网站、土壤呼吸作用及相關(guān)農(nóng)田氣象要素和植被特征進(jìn)行了野外試驗(yàn)測(cè)定和分析特黄特色大片无码特性视频，在試驗(yàn)觀測(cè)基礎(chǔ)上提取了重要生理參數(shù)，建立了基于過(guò)程的農(nóng)田與大氣間物質(zhì)輸送和能量交換的多層—雙葉模型久久综合加勒比金八天国，并對(duì)2008年試驗(yàn)期間冠層上方碳通量特征進(jìn)行了模擬可以免费看黄色网站，試驗(yàn)分析和模擬的主要結(jié)論如下：1。

The paper introduces the latest development and application in the production of engineering survey technology. GPS allocation technology and the combination of GPS and total station have been widely used in plane surveying of control survey. Electron distance trigonometric leveling can replace third and fourth-order spirit leveling in vertical survey. Data collection, processing and drawing by total station has achieved automation and integration in topographic survey, etc.

隨著工程測(cè)量技術(shù)的發(fā)展亚洲区欧美区综合区自拍区免，控制測(cè)量中平面測(cè)量已廣泛地采用了GPS定位技術(shù)热久久伊人、GPS與全站儀相結(jié)合的技術(shù)，高程測(cè)量中電子測(cè)距三角高程能代替三丰满美女黄网站AV、四等幾何水準(zhǔn)測(cè)量人人爽人人爽人人COm；地形圖測(cè)繪中，實(shí)現(xiàn)了全站儀從野外數(shù)據(jù)采集欧美操屄视频在线播放、處理到繪圖過(guò)程的自動(dòng)化和一體化无码免费毛片毛机在线ww；攝影測(cè)量和高分辨率遙感技術(shù)在大比例尺地形測(cè)圖中的應(yīng)用等。

CANBERRA - Australian firefighters are hoping for a barbecue, snow and a few hours sleep on Christmas Day as bushfires continue to blacken the country's southeast.

據(jù)路透社12月21日?qǐng)?bào)道人妻啪啪视频，澳大利亞?wèn)|南部地區(qū)的森林大火最近一直燒個(gè)不停黄色在线专区，而對(duì)那些始終奮戰(zhàn)在撲火最前沿的消防員來(lái)說(shuō)，他們眼下最希望看到的情景就是幾天后能迎來(lái)一個(gè)雪花飛舞的圣誕節(jié)人人操人人操人人操人人爽，這樣便可以借機(jī)吃上一頓野外燒烤国产精彩小视频，然后抓緊時(shí)間睡上幾個(gè)小時(shí)。

CANBERRA - Australian firefighters are hoping forabarbecue, snow and a few hours sleep on Christmas Day asbushfirescontinue to blacken the countrys southeast.

據(jù)路透社12月21日?qǐng)?bào)道欧美一级a大黄片，澳大利亞?wèn)|南部地區(qū)的森林大火最近一直燒個(gè)不停国产永久亚洲18禁在线，而對(duì)那些始終奮戰(zhàn)在撲火最前沿的消防員來(lái)說(shuō)，他們眼下最希望看到的情景就是幾天后能迎來(lái)一個(gè)雪花飛舞的圣誕節(jié)一级性生活强奸免费不卡视频，這樣便可以借機(jī)吃上一頓野外燒烤一级黄色视频免费网站，然后抓緊時(shí)間睡上幾個(gè)小時(shí)。

This paper is aimed to study the characteristics of slack-water deposits in Jiacha Gorge which is located at the middle reach of Yalu Tsangpo River. During field investigations and laboratory analyses, the observation was focused more on the sediment granularity.

根據(jù)雅魯藏布江加查峽谷段古洪水平流沉積物的野外調(diào)查與室內(nèi)分析18禁网站。，結(jié)合內(nèi)陸大江大河古洪水研究經(jīng)驗(yàn)所確立起來(lái)的分析判斷指標(biāo)體系91色色视屏，確定了雅魯藏布江的古洪水平流沉積特征，尤其是粒度指標(biāo)的相關(guān)特點(diǎn)亚洲鲁在视频在线观看。

On the basis of field investigation about the arbor, shrub and steppe communities in Wuqi county, the authors quantitatively analyzed the vegetation recovery and the relationship between vegetation recovery and soil erosion.

中文摘要：在對(duì)吳旗縣喬木林AAA亚洲无码高清、灌木林和草原群落野外調(diào)查的基礎(chǔ)上，對(duì)其植被恢復(fù)及植被恢復(fù)與水土流失的關(guān)系進(jìn)行了定量分析俄国av在线播放，結(jié)果表明一级免费SV黄片，在吳旗縣這樣的自然地理?xiàng)l件下，通過(guò)退耕還林日本一本之道高清不卡免、封山禁牧www..cao，植被完全可以得到恢復(fù)，完全可以控制水土流失的發(fā)生男人的天堂最新网址。

Based on the field investigation in Aug 2001 and Aug 2002, digital China Vegetation Map in 2001 and Qinghai-Xizang Plateau Vegetation Regionalization Map in 1996, vegetation characteristic along two sides of Qinghai-Xizang highway and railway is studied in this article Meanwhile, the impacts of Qinghai-Xizang highway and railway constructions on the ecosystems are analyzed using ARCVIEW人人上人人操超碰、ARC/INFO and PATCH ANALYSIS It was found that:(1) Qinghai-Xizang highway and railway span 9 altitudes,12 longitudes and 6 natural regions (East Qinghai and Qilian mountain steppe region, Chaidamu mountain desert region, South Qinghai alpine meadow steppe region, Qiangtang alpine steppe region, Guoluonaqu alpine scrub meadow region and South Xizang mountain shrub steppe region);(2) the constructions of Qinghai-Xizang highway and railway destroyed natural vegetation and landscape, especially in 50m-wide buffer regions along both sides of the roads, it was estimated that the Primary Productivity deceased by about 30504.62t/a and the gross biomass deceased by 432919.25～

：根據(jù)2001-08和2002-08月野外調(diào)查數(shù)據(jù)及2001年1∶100萬(wàn)中國(guó)植被圖人人曰、1996年1∶400萬(wàn)青藏高原植被區(qū)劃圖和2000年青藏鐵路沿線自然保護(hù)區(qū)分布及功能區(qū)界調(diào)整圖，以青藏公路鐵路沿線植被生態(tài)系統(tǒng)為研究對(duì)象欧美乱交牲交乱频，運(yùn)用ARCVIEW和ARC/INFO軟件研究青藏公路鐵路建設(shè)對(duì)沿線生態(tài)系統(tǒng)結(jié)構(gòu)的影響黄页网在线观看免费视频，結(jié)論如下：①青藏公路鐵路南北跨越9個(gè)緯度，東西跨越12個(gè)經(jīng)度国产拍精品，共穿越青東祁連山地草原地帶男女互插在线观看、柴達(dá)木山地荒漠地帶、青南高寒草甸草原地帶人人摸日日干、羌塘高寒草原地帶欧美日韩久荜、果洛那曲高寒灌叢草甸地帶和藏南山地灌叢草原地帶6個(gè)自然區(qū)，對(duì)植被類(lèi)型的統(tǒng)計(jì)結(jié)果顯示了地帶性国产免费一级二级AV。②青藏公路鐵路的建設(shè)對(duì)生態(tài)系統(tǒng)產(chǎn)生直接的切割成年男人深夜在线视频播放，使景觀更加破碎。

The time series in Magnetotelluricscontains multiple spectra and often has unneeded natural electromagnetic signals and the interference of 50 Hz and its harmonic frequency.

大地電磁測(cè)深法野外觀測(cè)得到的原始資料是包含多種頻譜的時(shí)間序列欧美黄色性爱综合网A片，這種時(shí)間序列中常包含不需要的信息和50 Hz及其諧波的干擾91av超碰在线观看。

Fully play roles of knowledge economy in loss assessment of seismic disasters, making the work of loss assessment intelligent or semi-intelligent, making the hard field work after a strong earthquake become data collections and establishment of database in normal time.

把地震后的高強(qiáng)度野外考察工作分散在平時(shí)的資料收集和數(shù)據(jù)庫(kù)的建立上，從而逐步達(dá)到在室內(nèi)就能完成快速評(píng)估的任務(wù)亚州一级毛片干带视频。

Based on the thorough study of the mechanism of self-potential and exploration method for oil and gas, some problems related to the theory of self-potential have been examined in detail in this dissertation; The origin of self-potential from the oil and gas deposits was re-expounded with the mechanism of the ionic polarization; The interpretation methods for field data collection and data processing are put forward.

本文通過(guò)對(duì)油氣藏自然電位產(chǎn)生機(jī)理及勘探方法研究毛片啪啪片A片，從理論和應(yīng)用兩個(gè)方面分析了現(xiàn)有理論存在的問(wèn)題，嘗試運(yùn)用離子極化機(jī)理重新闡述油氣自然電位的成因黄网免费观看在线网站，作為對(duì)現(xiàn)有理論的補(bǔ)充黄页网站免视频9，并給出了一套較完善的野外數(shù)據(jù)采集和室內(nèi)數(shù)據(jù)處理解釋方法。