In this paper, the Beijing mountain as a big ecosystems is studied, the use of RS technologies on the ecological degradation of mountain conditions of the remote monitoring of the dynamic, given explanatorily the ecological degradation monitoring indicators and calculation methods, the degradation of mountain ecosystems derived monitoring results, and in accordance with the monitoring results to identify the main reason for the degradation of mountain ecosystems.

本文把北京山區(qū)這么一個(gè)大的生態(tài)系統(tǒng)作為研究對(duì)象国产粗口粗暴国产一级视频，利用RS技術(shù)對(duì)山區(qū)的生態(tài)退化狀況進(jìn)行了動(dòng)態(tài)的遙感監(jiān)測(cè)手噜国产，探索性的給出生態(tài)退化相關(guān)的監(jiān)測(cè)指標(biāo)和計(jì)算方法先锋影音你懂的，得出山區(qū)生態(tài)退化的監(jiān)測(cè)結(jié)果强奸乱伦视频网站，并根據(jù)監(jiān)測(cè)結(jié)果識(shí)別山區(qū)生態(tài)退化的主要原因丝袜日韩中文无码视频。

The region in the altitude f rom 4400 to 4600 meters , which is mainly covered by alpine meadow and alpine swamp meadow , is st rongly degraded by the stock raising with it s influence radius of about 24 kilometers. The influence distance perpendicular to roads is also 24 kilometers , since road const ruction accelerates human2induced destruction to vegetation. Vegetation in shade aspect is rising due to the increase in precipitation , while vegetation in sunny aspect tends to be stable or degraded because of the enhancement in sunlight . Furthermore , the vegetation coverage is influenced by the groundwater level . In near riverbed fields , where the depth of groundwater is shallow , plant s can easily grow ; while in far riverbed fields , vegetation is prone to degrade due to drainage. The radius of river influence is 24 kilometers.

海拔4400～4600m的較低海拔地帶退化最強(qiáng)烈，主要為高寒草甸與高寒沼澤草甸受牧業(yè)影響較大欧美黄色视频,黑人黄色视频；牧業(yè)影響半徑為24km97人操人人插人人搞；道路的影響范圍為24km，道路的修建加速了人類對(duì)高原植被的破壞作用日本第一页；陽坡植被呈現(xiàn)趨于穩(wěn)定和退化的趨勢(shì)国产精品va在线观看一，陰坡植被表現(xiàn)為增長(zhǎng)的趨勢(shì)，降水量增加是源區(qū)植被国产在线观看黄A片免费网站，尤其是陰坡植被變好的重要原因2018偷拍视频，而太陽光照增強(qiáng)是導(dǎo)致陽坡干旱和植被趨于退化的潛在原因；近河床區(qū)地下水位埋深較淺欧美一级免费，植被生長(zhǎng)具有穩(wěn)定的地下水源欧美野外打野战A片视频；在遠(yuǎn)離河床的一定區(qū)域內(nèi)，地下水易于疏干黄色网站高潮视频免费观看，植被易于退化玖玖玖无码视频，河流影響范圍為24km。

Based on the existence condition of the solution for singular ordinary differential systems,the existence condition of the solution of the degenerate neutral differential system as well as the general solution are obtained by defining the solvable matrix pair and fundamental solution and using Laplace transformation.

討論了對(duì)于退化矩陣E不是方陣情形的一般退化中立型微分系統(tǒng)的解美女做视频在线播放网站，基于退化的常微分系統(tǒng)解的存在性條件日本黄色视频日本黄色视频，通過定義可解陣對(duì)和基礎(chǔ)解以及利用拉普拉斯變換，給出了一般退化中立型微分系統(tǒng)解的存在性條件以及通解表達(dá)式欧美一级免费看黄片视频。

In order to study the structure of tapetal degeneration in watermelon, especially on the relation-ship between the tapetal degeneration and pollen development, the light and electron microscopes were used.

為研究西瓜絨氈層退化的結(jié)構(gòu)特點(diǎn)欧美性爱23TB，尤其是絨氈層的退化與花粉發(fā)育的關(guān)系，用光學(xué)和電子顯微鏡研究了西瓜絨氈層退化過程。

The objectives of the study were to: 1 reveal the responses of vegetation and soil to degradation by investigating community characteristics and soil physic-chemical properties; 2 quantify the contributions of human factors and natural factors and the relationship among the factors by analyzing the variation of each factor in past decades; 3 understand the succession of fenced undegraded meadow, artificial pasture, semi-artificial pasture and degraded meadow, and to 4 provide suggestions for restoration and rehabilitation of the degraded rangeland in the region.

本項(xiàng)研究旨在通過對(duì)黃河源區(qū)退化高寒草甸的植物群落特征和土壤特征調(diào)查一a级视频，揭示植物和土壤養(yǎng)分對(duì)土地退化的響應(yīng)国产盗摄正在播放一区；對(duì)源區(qū)人口及牲畜數(shù)量和國(guó)內(nèi)生產(chǎn)總值，氣候變化特點(diǎn)等因子的分析A片免费视频网站入口，量化人為干擾因子和自然因子的貢獻(xiàn)率以及各因子之間的數(shù)量關(guān)系欧美一区二三区；以及對(duì)草地退化驅(qū)動(dòng)力分析以及原生草地植被封育、人工草地黄色免费观看网站网址、半人工草地的自然演替變化規(guī)律的研究凹凸黄色视频免费观看，為高寒草甸退化草地恢復(fù)與重建提供科學(xué)依據(jù)。

However, research on the relationship between herdman's production behavior and grassland degradation is not very much.Peasant problem is the core of"Three Agricultural Problems"in China.

大多相關(guān)研究集中在區(qū)域內(nèi)草地退化的表現(xiàn)和原因干干干干干干干色，而將牧民作為研究對(duì)象91av在线观看91，從牧民的生產(chǎn)生活出發(fā)探究草地退化之間成因、尋求抑制草地退化措施的研究尚不多見玖玖国产精品视频。

Var. chinensis Koidz was present in the grassland of middle degeneration. I. lactea was the dominant species in grassland of severe degeneration. I. lactea was the indicator plant of grassland of middle and severe degeneration.

馬藺的出現(xiàn)指示著草場(chǎng)出現(xiàn)了中度退化最新无码专区视频在线，而當(dāng)其成為優(yōu)勢(shì)種時(shí)，指示著草場(chǎng)已嚴(yán)重退化黄页在线免费观看色秀，馬藺是一種中度欧美在线视频首页、嚴(yán)重退化的指示物種。

Our study shows that Bax ,the protein of accelerating apoptosis, may participate in the proliferation and regression of hemangioma. 2 The expression of TGFβ1 in the involuting phase was higher than in the proliferative phase, the difference was statistically significant, p＜0.01. 3 This shows that Bax and TGFβ1 may be the important factors which cause the apoptosis of hemangioma and accelerate its regression as well.

1 Bax在血管瘤增生晚期開始表達(dá)永久在线精品免费播放，至退化期Bax的表達(dá)達(dá)到高峰一级a作爱在线视频观看，提示Bax這種促進(jìn)細(xì)胞凋亡的蛋白參與血管瘤的增生與退化過程。2 TGFβ1在血管瘤退化期的表達(dá)高于增生期欧美女肏屄，差異有統(tǒng)計(jì)學(xué)意義日韩一级A片在线高清视频，p＜0.01.3 提示Bax與TGFβ1可能是引起血管瘤凋亡，進(jìn)而促進(jìn)其退化的重要因素又爽又刺激的视频网站。

Now, as a result of the expansion of the hole in the ozone layer caused by global warming, Tibet has been facing problems of rising snowlines, dried-up lakes, and deteriorated grassland in recent years.

西藏的風(fēng)沙活動(dòng)歷史悠久美女任人插黄色视频，特別是受全球氣溫變暖、造成臭氧空洞擴(kuò)大的影響免费的看黄网站，近幾年西藏出現(xiàn)雪線上升欧美日韩人妻自拍、湖泊干涸、草場(chǎng)退化的問題最近高清在线视频观看，局部地區(qū)出現(xiàn)草地退化4438最新全国免费视频网、石質(zhì)化、低質(zhì)化等自然退化現(xiàn)象黄网站18岁禁。

Sandstorms have afflicted Tibet throughout its history. Now, as a result of the expansion of the hole in the ozone layer caused by global warming, Tibet has been facing problems of rising snowlines, dried-up lakes, and deteriorated grassland in recent years.

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degenerate Boolean algebra：退化的布林代數(shù)

退化失效 degeneracy failure | 退化的布林代數(shù) degenerate Boolean algebra | 退化函數(shù) degenerate function

degenerate Boolean algebra：退化的布爾代數(shù)

退化失效 degeneracy failure | 退化的布爾代數(shù) degenerate Boolean algebra | 退化函數(shù) degenerate function

declined：先端下傾的,退化的

下傾的 declinate | 先端下傾的,退化的 declined | 漸斜的 declivent

degenerate：退化的

線性函數(shù)(linear function);(零映射),(負(fù)映射),(矩陣的和),(負(fù)矩陣),(線性映射的標(biāo)量乘積),(矩陣的標(biāo)量乘積),(矩陣的乘積),(零因子),(標(biāo)量矩陣(scalar matrix)),(矩陣的多項(xiàng)式);(退化的(degenerate)方陣),(非退化的(non-degenerate)方陣),

rudimentary: a.1：基本的,初步的,早期的 2.未成熟的,已退化的

rival: v.與...匹敵,比得上 | rivalry: n.競(jìng)爭(zhēng),敵對(duì),敵對(duì)狀態(tài) | rudimentary: a.1.基本的,初步的,早期的 2.未成熟的,已退化的

vestigial：退化的,發(fā)育不全的

slur 含糊的發(fā)音:不清楚地發(fā)出 | vestigial 退化的,發(fā)育不全的 | prestigious 享有聲望的, 聲望很高的

catagenetic：退化的

catagenesis 退化 | catagenetic 退化的 | catalepsis 木僵

catagenetic：退化的,復(fù)舊的

\\"退化,復(fù)舊\\",\\"catagenesis\\" | \\"退化的,復(fù)舊的\\",\\"catagenetic\\" | \\"促骨折愈合的\\",\\"catagmatic\\"

non-degenerated linear substitution：非退化的線性變換

non-degenerated square formation 非退化的方陣 | non-degenerated linear substitution 非退化的線性變換 | nonlinear 非線性

degenerated linear substitution：退化的線性變換

degenerated square formation 退化的方陣 | degenerated linear substitution 退化的線性變換 | degree of freedom 自由度