1Niche construction can lead to stable coexistence of diverse genotypes in spatially structured population, which supports a stable polymorphism even without heterozygote superiority.(2)With habitat deterioration, niche construction accelerates the formation of steady polymorphism and hence impedes the harmful influences of environment on the population, which might embody a life-history strategy of organism under the unfavorable environment.(3)Niche construction results in the coexistence with alternative polymorphism through genotype-environment feedback and limited gene flow.(4)The niche-constructing organism is an active force to alter its environment and hence the direction of natural selection in order to better survival.(5)Spatial dynamics and distribution pattern of metapopulation are profoundly influenced by time-lagged niche construction.(6)Metapopulation size can reach a fixed level in the recency effect and equal weighting of time lag but is statistical stability in primacy effect, which implies the primacy effect is most remarkable.(7)The increment in the relative weightingof each generation\' niche construction and the length of time lag are significant factors for system destabilization.(8)Moderate capacity of positive niche construction benefits the metapopulation persistence.(9)The narrowing of niche breadth can decrease the metapopulation size and thereby increase the extinction risk.(10)The coupled function of time lag and niche construction make the system oscillation and generate the spiral wave, spiral-broken and circular wave in heterogeneous habitat.The spatial distributions of metapopulation and resource content are complementary due to a phase lag of their both frequencies.(12)Metapopulation persistence with niche construction depends not only on the balance between colonization and extinction, but also on the balance between the ability of niche construction and natural dissipation of habitat.(13)Metapopula-tion can survive under certain condition when the percent of suitable patches in habitat is lower than the ration of extinction to colonization.(14)Two thresholds exist in the process of transition of habitat quality dynamics from unsuitable to suitable, which include the intensity of niche construction and the initial condition of system.(15)Metapopulation size is positive correlated with the ability of positive niche construction, which means that organism or population who has strongly positive influences on their environment plays an important role to maintain the available habitat.

通過上述幾個(gè)方面的研究，主要得出以下15條結(jié)論：(1)生態(tài)位構(gòu)建可使空間結(jié)構(gòu)種群，甚至是在沒有雜合子優(yōu)勢的條件下，形成多種可能的穩(wěn)定基因型分布模式；(2)隨著環(huán)境的破壞與惡化瑟网站，種群的生態(tài)位構(gòu)建作用加速其較早形成穩(wěn)定多態(tài)以阻礙環(huán)境對種群的不利影響，解釋了有機(jī)體在不利環(huán)境下的一種生活史對策国内自拍日韩经典视频；(3)生態(tài)位構(gòu)建作用通過基因型—環(huán)境反饋機(jī)制及有限的基因交流導(dǎo)致基因型多態(tài)的穩(wěn)定共存亚洲黄色网站AAA；(4)有機(jī)體的生態(tài)位構(gòu)建作用是一種積極的動力改變環(huán)境進(jìn)而改變其自然選擇的方向；(5)生態(tài)位構(gòu)建的時(shí)滯作用對集合種群動態(tài)和空間分布產(chǎn)生深刻影響最近手机中文字幕视频大全；(6)集合種群大小在時(shí)滯的嶄新效應(yīng)和等權(quán)重效應(yīng)下達(dá)到一固定值免费试看AV，而在首位效應(yīng)下達(dá)到統(tǒng)計(jì)穩(wěn)定，表明首位效應(yīng)的影響最顯著在线国产高清视频；(7)首位效應(yīng)下生態(tài)位構(gòu)建相對權(quán)重的增量和時(shí)滯的長度是影響系統(tǒng)不穩(wěn)定性動態(tài)的關(guān)鍵因素黃色A片一級一級一級毛片；(8)適中的生態(tài)位構(gòu)建強(qiáng)度有利于集合種群的續(xù)存；(9)生態(tài)位寬度變窄會減少集合種群的數(shù)量從而增加其滅絕風(fēng)險(xiǎn)性交小视频无码；(10)時(shí)滯和生態(tài)位構(gòu)建的雙重作用使系統(tǒng)產(chǎn)生周期振蕩亚洲天堂日，并在異質(zhì)性環(huán)境中產(chǎn)生穩(wěn)定的螺旋波，破碎的螺旋波和環(huán)形波三種分布模式国产骚妇视频在线观看；(11)集合種群與資源含量的空間分布因?yàn)橄鄿パa(bǔ)无码直播毛片久久；(12)具有生態(tài)位構(gòu)建的集合種群續(xù)存不僅取決于侵占率與滅絕率之間的平衡，而且依賴于生態(tài)位構(gòu)建能力同其生境的自然消耗速率之間的妥協(xié)人人摸人人搞人人射；(13)當(dāng)生境中適合侵占的斑塊比例小于其侵占率與滅絕率之比時(shí)插插com，生態(tài)位構(gòu)建作用促使集合種群在一定條件下續(xù)存：(14)生境斑塊的狀態(tài)從不適合到適合轉(zhuǎn)變過程中存在生態(tài)位構(gòu)建強(qiáng)度和系統(tǒng)初始條件這兩個(gè)閾值；(15)集合種群的大小同正生態(tài)位構(gòu)建能力正相關(guān)欧洲女人性开放视频一级a，意味著對環(huán)境具有較強(qiáng)正作用的有機(jī)體對維持有效生境起積極作用人人看人人摸人人操人人摸人人操人人看人人。

When it comes to why Fujimori, but I did not dare to say this is because, after all, the Carrefour work I did a year and a half, not that I would like to be able to easily go away, I will want to leave the first one is due to the pressure of classwork, secondly, because of the opposition in the House, so I have to quit the job.

說到為什麼要提出辭呈，但我又不敢說出來是因?yàn)橐患兑患兑患兑患兑患镀吘惯@個(gè)家樂福工作我做了一年半了天天夜夜人人爽人人爽，不是我想就能輕易離開的欧美激情精品视频一区二区，我會想離開第一是因?yàn)檎n業(yè)上的壓力国产自产拍一区精品，第二是因?yàn)榧依锏姆磳Γ晕乙欢ㄒo了這份工作亚洲VS天堂。

Therefore, the torque required to open the gate valve required torque than the closure of large, in addition, for a pair of contact between the sealing surface, the Non Rising Stem Resilient Seated Gate Valves coefficient of static friction between them than the dynamic friction coefficient, to make them from the static state generate the relative movement is required to exert greater force to overcome the static friction; due to temperature changes, so that the sealing surface pressure between the larger, need to overcome the static friction force also will be bigger, so that when you open the valve on the stem nut on the sometimes increase the torque exerted a lot.

所以黄色视频免费看高清版，開啟閘閥所需的力矩比關(guān)閉閘閥所需的力矩大，此外美女性爱一区二区在线，對于一對互相接觸的密封面來說97人洗澡人人澡人人爽人人摸国产农村妇，它們之間的靜摩擦系數(shù)也比動摩擦系數(shù)大，要使它們從靜止?fàn)顟B(tài)產(chǎn)生相對運(yùn)動97人人模人人爽人人喊免，需施加較大的力以克服靜摩擦力ww黄色；由于溫度變化思思热在线国产，使密封面間的壓力變大，需要克服的靜摩擦力也隨之變大www.日本黄色网站，從而使開啟閘閥時(shí)97午夜理论理论福利无码，對閥桿螺母上施加的力矩有時(shí)會增大很多。" Moment analysis of valve operation "是由中國閘閥網(wǎng)提供的國際閥門新聞羞羞无码不卡视频，譯文僅供參考精品偷拍日韩第一页视频网站。另外，中國閘閥網(wǎng)還提供相關(guān)產(chǎn)品搜索：閘閥型號天天干天天射夜夜拍、閘閥價(jià)格AAAAAA黄色片、閘閥技術(shù)、閘閥新聞一级大片网址、閘閥生產(chǎn)商等亚洲中文字幕一区二区精品。

The major findings include:(1) By using fuel as the base indicator of relative efficiency, we found the following input factors' distribution inefficiency for domestic airlines: The distribution inefficiency of labor and capital input factors differs from airline to airline, and is becoming more severe with time; the distribution inefficiency of other factors does not differ very much among airlines but varies with time. It is inefficient from 1989 to 1995 but becomes more efficient during 1996 to 1997;(2) Airline companies have higher economies of density before 1996, but tend to show a constant return to density in 1997 when considering allocative distortions. The technical efficiency of input factors as a whole has declined after the open-air policy;(3) The costs of airlines are increasing significantly due to their distribution inefficiencies;(4) The instrument variable generated through a quasi price function does not have significant influence on cost; this may imply that airline companies in this time period did not exhibit the phenomena of high-quality high-price.

其主要結(jié)論如下：(1)藉由相對燃油分配效率探討各投入要素之分配扭曲情形發(fā)現(xiàn)：勞動和因定投入要素之分配無效率因公司別而有所不同，且隨時(shí)間而嚴(yán)重欧美一区二区入口www，唯民國86年稍有改善91自拍日韩；其他要素之分配無效率則較不因公司別而有所不同，但亦隨時(shí)間發(fā)生變化人人H在线一区二区，初期為無效率久久WW黄色1级视品，在民國85、86年則較具效率女人特黄大片视频；(2)若考慮分配扭曲情形下18岁以下黄色网站，國內(nèi)航空業(yè)在民國85年之前具有較高之密度經(jīng)濟(jì)，民國86年則趨向固定密度報(bào)酬谁有可以直接看av的网站；此整體投入要素之技術(shù)效率而官在线观看黄A片免费AV网站，在天空開放政策后其技術(shù)效率隨時(shí)間變化而下降，但就燃油投入要素平均技術(shù)進(jìn)步率而言欧美www在线观看，則其技術(shù)效率逐年增加且幅度明顯怡红院老首页主页入口；(3)航空公司因分配無效率所造成成本增加的情形相當(dāng)明顯；(4)準(zhǔn)價(jià)格工具變數(shù)對成本之影響并不明顯日韩丝袜清纯自拍视频在线观看，此可能反映在此期間國內(nèi)航空公司似乎并未趨向於高品質(zhì)高價(jià)格之現(xiàn)象亚洲欧美自拍另类日韩。

This paper is trying to do some counterproposal studies pointing to main outstanding issues of transpacific market, but due to limited information, it is not able to solve all current problems and needs more theoretical analysis to this particular market in the future.

本文試圖對該航線的主要問題提出可行的對策和方案，但由于在信息搜集等方面的限制国产精品自拍一区在线播放，本文不可能對所有問題得出有效的結(jié)論欧美性爱A√视频在线，還有待進(jìn)一步的分析和研究。

The job of the guide or alpine climbing instructor is to progressively bring the student to use his feet better and with more precision. The harder grades due to steepness but above all quality of the ice, requires using crampon techniques similar to those used when climbing with rock shoes. The four front points take on a similar importance as it is often necessary to place them rather than kick them.

日益增多的向?qū)Ш透呱脚实墙叹毜娜蝿?wù)是讓學(xué)員們更好更精確的使用好他們的腳av呦呦，更高的難度級別意味著更加險(xiǎn)峻在线视频懂，但首要的是冰的質(zhì)量，因?yàn)樗赡苄枰愃葡衽蕩r鞋一樣運(yùn)用冰爪的技巧，冰爪的四個(gè)前齒承擔(dān)著跟攀巖鞋同樣重要的功能久久网色，有時(shí)候如何放置于好他們比如何踢它們顯得更有必要欧美性中文。

No matter how history changes, deep feeling of the blood is constantly cutting, but due to historical and political reasons, making Taiwan and Taiwan Solitary Suspended Therefore, Taiwan's various periods of literary works, for homesickness brought the subject to express the Taiwan compatriots Kepan eager to return to the reunification of the motherland and the strong feelings Hometown, homesickness is to leave their land, far away from their loved ones Youzi, the hometown of the missing Situation, the customs barrier Hill's hometown of personnel memories, the memory of Youzai is the hometown of nature, changes in the deep yearning Fengwu, a family with the demands of fantasy prayer!

無論歷史如何變遷，濃濃的血脈之情是剪不斷的国产无遮挡又黄又爽免费网站，但由于歷史和政治的原因尤物视频欧美性爱，使得臺灣寶島孤懸，因此全球持级黄毛片免费，臺灣各個(gè)時(shí)期的文學(xué)作品第一中文字幕AV在线，針對鄉(xiāng)愁這一主題淋漓盡致地表達(dá)了臺灣同胞渴盼祖國統(tǒng)一和渴望回歸故園的殷切之情，鄉(xiāng)愁是離開故土久久精品免费福利网、遠(yuǎn)離親人的游子中文欧美福利，對故鄉(xiāng)的思念之情，是對關(guān)山阻隔的故鄉(xiāng)的人事的回憶福利视频免费，是游子對記憶中的故鄉(xiāng)自然景物亚洲网络在线、風(fēng)物變遷的深切思念，一種親情的訴求與幻想的祈求手噜国产！

But the bits to bits arbitration of the CAN protocol defines a static priority to messages exchanged. Due to the fact of the lack of timing information for non periodic data transmission, it is impossible to find a static manner to attribute CAN identifiers to exchanged objects so that applications periods limit can be always be satisfied. When one or many network stations send data using the same identifier, at some point, data will differ and generate error. All stations will then back off and retransmit restarting the whole process. In this case, retransmission can lockup the network.

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The quality of interior environment in nursing home residents will become one of the attention-getting subjects due to the gradual increase of aging populations This paper directs at the research of nursing home's interior environment factors in Tainan We use the standard of international practice to analyze the intrinsical data of environmental monitoring and establish the characteristics which from environmental physical reaction of nursing home The research items are air environments (PM10 CO CO2 formaldehyde TVOC) temperate environments and light environment (illumination average brightness daylight factor) etc There are the inductive conclusions of this research: 1 In basic medicine the clinical diagnosis means the theory and technique about physical examination with patients The definition of clinical diagnosis in architecture should be the diagnosis of building preserve and improve the feasible way to extend building's service life and assure the residents of the healthy quality of interior environment The object of clinical diagnosis in architecture is not only to ensure the use of structure and environment quality but also keep the structure and environment quality in sustainable; therefore creating an efficient system of preserving plan is needed 2 It is an accurate and technical circumstance which about improving remedying and reconstructing the problems of structure space This circumstance includes finding questions ensuring causation ascertaining ultimate strength evaluating environment quality estimating the necessary of restoration and implementing on a suitable way Furthermore when reconstructing and ameliorating the appearance of structure space it should be respected and the memories of it should be preserved 3 In clinical diagnosis of environment quality of space the question of physical environment and the deficiencies of structure must be separated The structure space of construction and the high quality of space should be inspected strictly then observed the crucial reason that can find out any invisible and hidden causes The diagnosis of construction is to observe the reason of destroyed structure The environmental diagnosis of indoor and outdoor is to find out the crucial reason that influences health 4 In order to decrease the iterant problems the construction and environment of space should be diagnosed However the destruction by natural strength and artificial using by human are important causes that can affect the service life of construction Searching the cause of disease just like curing the patient which includes inspection diagnosis cure and prevention We tested the thermal conductivity of siding material in this research and then found out the roof east vertical face and west vertical face have most radiant heat especially the construction of RC The characteristics of opaquely outer casing have relations with the thermal conductivity of wall to wiz the ability of heat insulation Therefore increasing the efficiency of heat insulation and decreasing the endoergic factor of insolation are very important to temperate environments

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To test the respirators fitness, we used quantitative fit test system to measure the fitness of the three models of new respirators worn by real person. The testing method is to use a differential mobility analyzer to select the particles of 40nm in diameter. N95 respirators are capable of filtering out almost all 40nm particles, therefore, the 40 nm particles measured within the respirator would be considered due to the leakage caused by poor fitness.

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