After collection and drying, the product is weighed on an analytical balance and, from the mass and known stoichiometry the original analyte is quantitatively determined.

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The loss of weight of powder during combustion process, phase change, conglobation, grain size, crystalline grain distortion situation, maximum magnetic energy and coercive force were get detaily.

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The paper focuses on the tetraploidy black locust on Loess plaeatu of West Shanxi province, applys steady state promoter method and image processing technology to study the days transpiration water consumption in different weather ,different seasons and different site conditions,has primary analysis on the impact of environment on the transpiration and carries on the calculation to the tetraploidy locust tree by the single leaf water consumption to the single tree water consumption in CaiJiachuan watershed; Uses fast weighing method to measure and analyze the transpiration water consumption of five different herbs under the tetraploidy black locust forest (Capillary Wormwood,Vanilla,Agropyron Sristatum , Common Sowthistle and Medicago Sativa) in short time, in the same and different growcrop,and calculates the average transpiration water consumption per square metres ;the soil colome weighing method was used for determining diumal variation quantity of soil moisture evaporation, analyzing the dynamic variation and caculating the total quantity of soil evaporation water consumption from May to August ; then 5 kind of suppositions about the types of surface vegetation coverage are proposed in experimented site and the total evapotranspiration water consumption are calculated under 5 suppoitions ,aim at providing preliminary theoretic basis for ascertaining the transpiration water consumption of tetraploidy black locust forest,controling standing forest density and optimizing the forest grass deploy on loess plaeatu of west Shanxi province .

本文以兩種不同立地條件下的四倍體刺槐林為研究對(duì)象国产一级A片免费视频在线观看，采用了氣孔計(jì)法對(duì)蔡家川流域生長季內(nèi)不同天氣狀況下(典型晴天、陰天和半陰天)四倍體刺槐日蒸騰耗水規(guī)律人人操人操人人射、不同季節(jié)(生長季初期www.se视频、中期和末期)的蒸騰耗水規(guī)律、兩種不同立地條件下四倍體刺槐蒸騰耗水比較以及影響四倍體刺槐蒸騰耗水的環(huán)境因子進(jìn)行初步研究分析欧美国产综合在线，并對(duì)四倍體刺槐由單葉耗水量向單株耗水量進(jìn)行推算十八以下禁止观看的网站；采用經(jīng)典快速連續(xù)稱重法對(duì)四倍體刺槐林地生長的主要5種草本植物(白蒿、香青蘭黄软件在线观看、冰草欧美黑人大尺度又粗又长最新章节、苦苣和苜蓿)短時(shí)段內(nèi)蒸騰耗水規(guī)律、不同生長季內(nèi)蒸騰耗水規(guī)律无码全黄性涩视频在线、同一生長季不同種類草本植物蒸騰耗水量進(jìn)行了比較分析亚洲中文字幕久久精品，并且采用面積與重量比的方法推算出了單位面積四倍體刺槐林地幾種主要草本植物平均蒸騰耗水量：采用土柱稱重法測定了5月份～8月份土壤水分蒸發(fā)晝夜變化量、對(duì)試驗(yàn)期內(nèi)土壤蒸發(fā)量動(dòng)態(tài)變化作了分析国产在线视频欧美、推算出了試驗(yàn)地5月份～8月份土壤蒸發(fā)耗水總量黄色免网站；對(duì)試驗(yàn)地地表植被覆蓋類型提出了5種假設(shè)成人网站香草视频在线观看免费，推算出5種假設(shè)的情景下蒸散耗水總量欧美一级黄色黑人操黑人，旨在為晉西黃土區(qū)四倍體刺槐林蒸騰耗水量的確定、林分密度調(diào)控以及林草優(yōu)化配置等提供初步的理論依據(jù)欧美多人群p在线观看。

The process of setting up the ship form main dimensions is mainly relied on the multivariate and stepwise regression in the past which based on the massive subsistent data including the main dimensions, Light Weight, storage capacity, stability and total cost and so on.

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This paper, which focused on the structure optimization theory and method, has finished such studies as follows: The three dimension model has been built, which provide the necessary conditions for the building of the dynamics equivalent model. By the launch dynamics simulation, the loads of the key joints when the rocket is launched has been got, which provide the necessary data for the finite element analysis and the structure optimization. The finite element model of the excess weight parts of the rocket has been built, buy the finite element intension analysis of the model in two conditions, the displacement and the stress of the key points have been got, which make us know the distributing of the stress and the transmogrification of the part. To satisfy the intension and the precision design request and to decrease the weight of the part as many as possible, the part has been topology optimized by the structure optimization theory and method. After that, the new model has been analysis in structure and launch dynamics. The contrast of the character change of the old part and the new part and the influence on the rocket system have been studied.

本文以結(jié)構(gòu)優(yōu)化理論和方法為核心，主要做了以下工作：建立了某自行火箭炮全炮三維實(shí)體模型美女赤裸露私密部位网站，為建立該火箭炮系統(tǒng)的動(dòng)力學(xué)等效模型提供了必要條件台湾特级黄片，進(jìn)行了發(fā)射動(dòng)力學(xué)仿真，得到該火箭炮發(fā)射裝置各關(guān)鍵連接部位在發(fā)射狀態(tài)下的載荷国产欧美色,一区二区三区，為有限元分析和結(jié)構(gòu)優(yōu)化提供了必需的數(shù)據(jù)黄色十黄片；建立了該火箭炮發(fā)射裝置超重部分的有限元模型，分兩種工況亚洲va国产日韩欧美精品色婷婷，對(duì)模型進(jìn)行了有限元強(qiáng)度分析国产精品视频免费视频看看，得出了關(guān)鍵部位的位移和應(yīng)力值，對(duì)其的應(yīng)力和變形分布有了具體的了解草国产在线视频；運(yùn)用結(jié)構(gòu)優(yōu)化的理論和方法三级片A片一级毛片视频，對(duì)該火箭炮發(fā)射裝置超重部分進(jìn)行了拓?fù)鋬?yōu)化，使其在滿足強(qiáng)度和精度的要求下盡可能多地減輕重量97无码免费人妻超级碰碰碰，對(duì)優(yōu)化后得到的模型進(jìn)行了結(jié)構(gòu)分析和發(fā)射動(dòng)力學(xué)分析欧美激情A片在线播放，對(duì)比了該部件優(yōu)化前后的特性變化以及對(duì)火箭炮系統(tǒng)的影響。

The chemical analysis of N, P and K in organic fertilizer is presented: sample is decomposed by sulfuric acid-hydrogen peroxide and prepared to be a solution. N can be determined by NC-2 model quick N analysis set, P by chinoline molybdic acid method and K by tetraphenylboron potassium, needless of spectral photometer and flame photometer, the method is available when the content of N, P or K is over 0.1% with desired accuracy and precision.

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The PID weight control system s structure of MK95 cigarette machine was introduced and the principle about the control system was analyzed, such as the check of weight symbol, PID parameter choice.

介紹了MK95卷煙機(jī) PID重量控制系統(tǒng)的結(jié)構(gòu)，對(duì)其控制原理進(jìn)行了分析重量信號(hào)的檢測、控制過程中文字幕人妻偷伦在线视频、削減盤電機(jī)速度控制18岁禁止入内网站、數(shù)字PID控制算法的實(shí)現(xiàn)、PID參數(shù)選擇亚洲国产AⅤ精品一区二区观看。

The physiology characters of the leaf of ear in different periods have been studied It is showed that the water content and protein content,leaf_area and protein weight per square of leaf of ear from silking to 42d after silking all reduce gradually , but dry-weight and leaf -area did not do The correlate analysis showed that the protein content of leaf of ear in different periods and protein- weight per square did not correlate significantly with protein content of seed Dry weight of leaf of ear was ...

研究不同時(shí)期穗位葉的部分生理性狀表明：從吐絲期至其后 4 2d 人人操人人人人摸人人干，穗位葉的含水量、單位葉面積怡红院首页视频免费播放一区、蛋白質(zhì)含量和單位葉面積蛋白質(zhì)重量均呈現(xiàn)一個(gè)逐漸下降的趨勢亚洲第一色日韩；穗位葉葉片干重和葉面積基本保持不變。相關(guān)分析表明欧美偷一区二，不同時(shí)期穗位葉的蛋白質(zhì)含量免费在线中文字幕、單位葉面積蛋白質(zhì)重量與子粒蛋白質(zhì)含量無關(guān)，而吐絲期穗位葉干重和子粒蛋白質(zhì)含量呈顯著正相關(guān)

The population of crucian carp in Honghu Lake had relatively complex age-structure with eight age classes and the individuals older than three-year-old accounted for about 25%.

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After measurement and analysis of the interfering voltage, potential gradient, the point current density, the weight-loss increases with average current density, and the depth of penetration increases with the interfering voltage.

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