Based on the information taken from the subcompartmental records a comparison between the actual and normal forests was made and a new point of view was proposed in the article: in the case of cultivating timber-forest which is different in cutover age, age class and growing speed within the range of the whole forest station, the forest age class distribution showing the opposite shape of "J" is of more benefit to keeping the relative stability of all the age class area than the age class distribution of th...

本文在統(tǒng)計森林資源小班檔案卡片有關(guān)資料的基礎(chǔ)上，把現(xiàn)實林分與法正林相比較美国黄片aaa，用法正林學(xué)說來指導(dǎo)全場森林的調(diào)查欧美日韩ab一区。并提出了一個新的觀點：在整個經(jīng)營單位內(nèi)，培育不同生長速度亚洲加勒比无码一区二区，不同主伐年齡性开放永久免费视频，齡級期不同的用材樹種，森林的齡級結(jié)構(gòu)呈反"J"形分布此法正分布更有利于維持各齡級面積的相對穩(wěn)定出处男女视频网站，并且欧美激情视频一区二区免费，年伐量的波動不大，有利于森林的永續(xù)利用操逼网2020。

This paper also analyzes the family change in terms of age-specific headship rate approach, and depicted the population distribution by various family household types for age groups.

本研究收集和分析了北京近年來人口普查的數(shù)據(jù)国产在线专区，研究了北京市人口與家庭大学生美女一级片、戶居的變化歷程，并探討了這些變化背后的若干影響因素my国产精品免费。

The results show that both the incidence and prevalence rates are increasing over 1996 to 2003; the incidence rate, prevalence rate, survival function, mean onset age, and mean remaining life after onset of females are all larger than those of males. In addition, females are less biologically aged than males at the same chronological age by 1.3279 years in terms of the empirical distribution function of onset age.

研究結(jié)果顯示，首發(fā)率和盛行率皆有逐年上升的趨勢99se在线播放，而女性患者之首發(fā)率天天婬色婬香综合网站日本、盛行率、存活機率亚洲日韩欧美另类、首發(fā)后之平均余命皆高於男性色综合无码视频；此外，若單純以男這一個毛片、女性患者之首發(fā)年齡而論国产三级综合，其經(jīng)驗機率密度函數(shù)顯示：男性患者之生理年齡比同年齡的女性患者早衰1.3279歲。

Values, the chemical composition of biotite of them and their petrochemical composition on the corresponding dia grams are all distributed transitionally between the "typi cal areas"; 2 that the micro-elements indicating genesis and the REE distribution parttens display the transitional change from the mines in North to those in South in this region; 3 that their K-Ar age of biotite is distinctively inconsistent with their Rb-Sr age of total rocks; and 4 that there occur several rock body groups with various genetic features which are formed at the corresponding time in the same Pb-Zn ore fields.

具體表現(xiàn)在全巖鍶同位素初始比值深夜欧美日韩福利、黑云母化學(xué)成分麻豆AV在线网站，巖石化學(xué)成分在相應(yīng)圖解上不集中而呈&過渡態(tài)&分布；微量元素成因特征及稀土分配型式在本區(qū)空間上呈&過渡態(tài)&展布男人的天堂一级片；巖漿分異演化過程中各種地球化學(xué)演化參數(shù)不連續(xù)變化亚洲国产精品综合高清入口久久；全巖Rb-Sr同位素年齡與黑云母K-Ar年齡值嚴(yán)重不合；同一礦區(qū)91精品99久久，普遍發(fā)育不同巖性組合的巖體群等等尤物视频免费。因此，地洼型多因復(fù)成成巖成礦作用在湘南鉛鋅礦床形成過程中是一個帶有普遍性的區(qū)域成礦規(guī)律r日韩一级黄色网站。

The results showed that Liquidamba formosana, Quercus acutissima, and Quercus fabri populations had the dominant positions in the forest community of Purple Mountain Area of Nanjing. During the growth process, the mortality of L. formosana, Q. acutissima, and Q. fabri were higher in low age. After entering into the middle-age stage, the upper space was occupied by oak and L. formosana population all died. The mortality of Q. acutissima and Q. fabri populations were increased with the increasing of diameter class. L. formosana population in the Purple Mountain Area of Nanjing belonged to be the typical growing population and Q. acutissima population was a decreasing population. Q. fabri population belonged to be the growing population on the whole, but the diameter class in middle parts was incomplete and the population was difficult to be renewed. Among the studied quadrate, only one dominant population showed an aggregated distribution and other dominant species showed the random distribution. Either, all the dominant species in all the quadrates presented random distribution.

結(jié)果表明国产无码在线黄色工厂，楓香種群、麻櫟種群和白櫟種群在南京紫金山地區(qū)森林群落中占有優(yōu)勢地位久久人人插；楓香種群视频在线A片、麻櫟種群和白櫟種群在其生長過程中，在低齡時期国产片三级，死亡率都較高国产激情视频久久久，進入中齡期后，由于上層空間都被櫟木占據(jù)国产精品一级毛片www，楓香種群全部死亡国产爆乳日韩精品视频迅雷下载，而麻櫟種群和白櫟種群的死亡率則隨著徑級的增大而增大；南京紫金山地區(qū)楓香種群屬于典型的增長型種群亚洲色一区，麻櫟種群屬于衰退型種群AAA搡老熟女国产，白櫟種群總體上屬于增長型群落，但中間徑級不完整av在线免费资源，種群更新較為困難国产激情自拍小视频；在所研究的每一個樣方中99玖玖，一般只有一個優(yōu)勢物種呈聚集分布，而其他優(yōu)勢物種呈隨機分布国产在线b，或樣方中所有優(yōu)勢物種都呈隨機分布视频国产欧美。

The age class structure of Salix oritrepha population in alpine, cloudy and wet area of east Qilian Mountian is studied ,on two levels of genets and their ramets and sprouting branches .The results show that genets population is very short of the first and second class seedlings,and most of seedlings belong to the third and forth classes, and the development trend of population on this level is stable;on the other hand,the age structure of remets and sprouting branches population is more complete,and its age class distribution chart likes triangle, belonging to increasing type.In general,Salix oritrepha population in this area is increasing, but its reproduct way have changed in community succession process in order to accommodate varying circumstances.

從無性基株個體種群和無性克隆分株及萌生枝種群兩個層次上對東祁連山高寒陰濕地區(qū)山生柳種群年齡結(jié)構(gòu)進行分析，結(jié)果表明：無性基株個體種群 0~10 齡級幼苗貯備嚴(yán)重不足欧美色操，11~20 齡級苗木所占比重最大18岁网，種群動態(tài)呈穩(wěn)定型；無性克隆分株和萌生枝種群年齡結(jié)構(gòu)比較完整欧美AA一级黄片免费看，結(jié)構(gòu)分布圖呈正三角形国产欧美精品综合区，種群動態(tài)表現(xiàn)為增長型；總體上來講山生柳種群呈增長趨勢激情综合五月激情综合五月65，只是在演替過程中為適應(yīng)環(huán)境其繁殖方式有所改變A毛片在线，導(dǎo)致現(xiàn)階段山生柳種群兩個層次結(jié)構(gòu)狀態(tài)。

In the model of dry-distribution,the leaf age of different plants leaves and the distribution of assimilation at different positions were confirmed based on the distribution process of assimilation in combination to the organ building process.

基于黃瓜器官建成的同化物分配模型中欧美日本视频，在現(xiàn)有的同化物分配理論的基礎(chǔ)上一级做a爰片久久毛片A片久久，提出了基于器官發(fā)育模型的同化物再分配過程模擬，將器官的形態(tài)擴展和同化物分配過程相結(jié)合国产精品一区24p，確定了不同植株葉齡国产精品裸体视频、不同位置的葉片獲得的干物質(zhì)模型，將同化物分配和形態(tài)擴展過程有機地融為一體亚洲二区视频在线。

Results: The age distribution of tooth-marked tongue group centralized from 30~50 years.

結(jié)果：齒痕舌組的年齡分布集中在30~50歲163无码电影；與對照組相比淡白舌的出現(xiàn)率較高；易出現(xiàn)的癥狀有：感冒時間長欧美,日韩,日本,在线观看A、怕冷日本公共厕所www撒尿、記憶力差、食欲差在线日本成本人视频网站、站立時頭暈永久免费AV无码网站大全、腰酸等虛證表現(xiàn)。

By comparing the age structure characters of the registered population,Kish table population and the respondent population,the author calculated the theoretical probability distribution of Kish table and found the reason of low proportion of the younger age group in the household sample table and the distorted age structure.

在對比登記人口精品亚洲黄色片、Kish選樣表人口和被調(diào)查人口的年齡結(jié)構(gòu)特點的基礎(chǔ)上国产污片免费网站，分析Kish表的理論概率分布，發(fā)現(xiàn)了低齡人口入選比例低和Kish選樣表中入選人口與被訪者年齡結(jié)構(gòu)扭曲的原因手机黄网欧美高清。

In addition, many studies of patients with AVN showed plenty of special characteristics,such as age distribution and bone quality.Objective:To study the geometric features of proximal femur for the Chinese AVN population,in order to prove the existence of special characteristic of proximal femur for the disease and then develop an AVN-specialized stem evaluated by a validated finite element analysis.Methods:1.The author investigated the standard X-ray data of 127 cases(179 hips) with definite diagnosis of AVN to provide anatomical references for this disease.At the same time,we conducted a meta-analysis of anatomical studies of normal proximal femur data,including the section of LT+20,LT,LT-20 and CFI to identify the potential difference between AVN and normal population.

方法1久久久丰满老熟妇、通過研究AVN患者標(biāo)準(zhǔn)X線正、側(cè)位片127例(179髖)欧美熟妇人妻XXXXX，獲得股骨近端的解剖學(xué)數(shù)據(jù)欧美曰批视频免费播放免费，利用薈萃分析的方法比較AVN患者股骨近段髓腔特征平面(LT+20，LT黄色网站影视电影黑人视频在线观看，LT-20)及CFI的改變與以往研究數(shù)據(jù)的差異91视频国产美女裸体，并利用創(chuàng)傷性FNF患者資料代替正常人股骨數(shù)據(jù)進一步比較髓腔前18禁超污又黄又爽的免费网站、后、內(nèi)欧美性爱特黄色视频、外四條曲線段上的差異亚洲妓女视频。2、通過結(jié)合現(xiàn)代CAD技術(shù)大黄av，將內(nèi)亚洲91在线、外、前一级片不卡网站、后曲線擬合到AVN柄的外形上，選用短柄假體設(shè)計色哟哟网站进入，近段設(shè)計利用AVN患者骨髓腔CT相對應(yīng)位置的斷面進行修正99re这里只有是精品，設(shè)計AVN人工股骨柄。3欧美精品性爱、計算機三維有限元分析：①使用CAD軟件SolidWorks和有限元軟件Ansys所建立的髖關(guān)節(jié)股骨側(cè)假體置換后的三維有限元模型欧美丝袜特黄大片。