Treating with coils as aeolotropy, this paper brings forward a set of mathematical mode for computing internal stress distribution of coil in the process of coil coiling, in which some factors are taken into account, such as the transverse distribution of shape, crown and curl tension of the strip, the friction between the strip and the reel, the friction between strips, and etc. Because the reel shrinkage and the inner circle of the strip losing radial restrain and circumferential restrain can induce interlayer slipping and the change of the whole coil compactedness , the assumption concerned ——"virtual reel" in the process of coil uncoiling is put forward, which takes the form of slow action to express the uncoiling process and, therefore clearly simulates the variation course of internal stress distribution of coil in the process of coil uncoiling.

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A finite element model is proposed to calculate the mechanical state of a moored aerostat system. The difficulty in matching the loads of the tethers is overcome by releasing the tether constraints and applying the load step by step. The causes of non-convergence during computation is investigated and solved by modifying the criterion appropriately.

針對浮空器地面系留系統(tǒng)采用多級(jí)系繩集束設(shè)計(jì)導(dǎo)致有限元建模中系留力難以施加的問題国产精品一线二线毛片，提出了分步加載，對系繩節(jié)點(diǎn)逐級(jí)建立載荷匹配關(guān)系的建模技術(shù)二级片视频免费观看；對囊體局部應(yīng)力集中導(dǎo)致計(jì)算難以收斂的問題進(jìn)行了分析并提出解決方法亚洲一级黄色卡。

Based on the idea, this paper proposed an efficient algorithm to compute 3P+Q directly over F in terms of affine coordinates, its computational complexity was 1I+3S+16M, saving one field inversion compared to Ciet's method.

根據(jù)這種思想，提出了素域F上用仿射坐標(biāo)直接計(jì)算3P+Q的算法色在线视频网站上，其運(yùn)算量為1I+3S+16M十八岁女生禁看网站，比Ciet等人提出的方法節(jié)省了一次求逆運(yùn)算久久香蕉国产线看观看精品蕉。

Compared with the invariant features of single parameter group, entirely global affine invariant features are more applicable, and chapter 4 introduces a new global affine invariant feature extraction method called EC-ARC, which is based on the invariance in affine geometry.

然后，提出了擴(kuò)展質(zhì)心(Extended Centroid国产三级精品三级在线播放， EC)和仿射區(qū)域劃分(Affine Region Cutting99re在线这里只有精品视频7， ARC)的新概念，并在EC和ARC的基礎(chǔ)上免费一级A男女牲交，結(jié)合仿射幾何性質(zhì)老妇女黄色视频，提出了構(gòu)造具有完全仿射不變性的特征提取方法EC-ARC。

With the society Of city develobing ,the value of urban forestry become More and more affirmable and is taken care by every City in the world ,this paper excerpt the history of Urban forestry and the need of constructing urban forestry ,refer to concept ,category ang area of urban forestry ,introduce the condition of natural and environment,the situation of society and economy of nanning simply, summarize status of forestry resource in nanning, analyze and evaluate urban forestry in nanning about city afforestation ,timber structure,biodiversity ,comprehensive development of forestry ,and so on ,in according with investigation of Nanning citys afforestation in 2000,and suburban forest resource survey in 1999 ,and so on ,suggest the antidote of sustainable development according to the problem existing at present and develobment tendency of ecology ,second, bersist the orientation development of urban forest ,third,persist the principle of "the same three paces"and "the three unity",the last,change the affaire of managed department

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Using air cylinder as the power supply for the punching of frivolous things is presented in the article.

提出用汽缸作為輕薄件沖孔的動(dòng)力源，同時(shí)提出氣缸沖孔時(shí)的動(dòng)作控制方式精品国产99久、動(dòng)作時(shí)間等手机免费看黄在线高清视频。

Based on mechanism and vehicle theories theoretical analysis is pursued and normal driving conditions are put forward. The relations are analyzed between load distribution and power consumption. Mechanical formula is proposed. Furthermore in this paper the theoretical model of the total power consumption is established, and the relations of the total minimized power consumption with the air-cushion pressure and the fan revolution are discussed. The optimum operation point is put forward. The dynamic digital simulation studies are carried out on the operating procedure of the half-track air-cushion vehicle on soft terrain. Mechanical parameters and soil mechanics characteristics affecting vehicle power consumption and riding performance are analyzed. At the same time according to the model formula, the automation control problem is discussed. It is a theoretical instruction for further automation control.

本文還從力學(xué)和車輛原理的角度進(jìn)行了理論分析，推導(dǎo)了半履帶式氣墊車的需求功率及正常行駛條件亚洲天堂aⅴ在线，研究了氣墊壓力和功率消耗之間的關(guān)系免费久久视频，提出了力學(xué)模型公式；建立了半履帶式氣墊車總功率消耗的理論模型中文黄色字幕网站，研究了最小功率消耗時(shí)功率與墊壓及表征氣墊車行駛狀態(tài)的各參數(shù)的關(guān)系国产精品国产国产AⅤ，分析了相應(yīng)的影響因素，并提出了最佳工作狀態(tài)的定義日韩av三级片；同時(shí)進(jìn)行了半履帶式氣墊車在軟地面的行駛過程的動(dòng)態(tài)數(shù)字仿真試驗(yàn)研究工作欧美激情中文字幕第八页视频，對影響車輛功率消耗和行駛平順性的各力學(xué)參數(shù)和土壤參數(shù)進(jìn)行了分析黄片免费区，得到了各運(yùn)行狀態(tài)參數(shù)的變化規(guī)律，驗(yàn)證了最佳工作狀態(tài)和最佳墊壓的理論精品国模一区二区，根據(jù)力學(xué)模型公式對進(jìn)一步的自動(dòng)控制問題進(jìn)行了探討欧美美女在线看，為系統(tǒng)的控制提供了理論指導(dǎo)。

A methodology of noise-like key generation is presented. Chaotic process of tentmap function is used as a deterministic generation of noise-like key, image storage and retrieval are completed in a algebraic form. A mathematics model of noise-like chaotic coding memory is constructed, meanwhile the basic mechanism of circulant convolution and circulant correlation in image information storage and retrieval are demonstrated.

在詳細(xì)闡明數(shù)字序列和字母序列的1-D映射函數(shù)設(shè)計(jì)方法的基礎(chǔ)上尤物在线草草一区二区，利用構(gòu)造出的1-D映射的穩(wěn)定周期環(huán)和不穩(wěn)定極限環(huán)完成了存儲(chǔ)和聯(lián)想記憶功能能看的黄色网站福利，為了識(shí)別有關(guān)的輸入信息，提出了映射函數(shù)直接控制的方法来部一级毛片；在此基礎(chǔ)上自拍灌醉迷j系列在线观看，提出了一種1-D映射型混沌神經(jīng)網(wǎng)絡(luò)模型，該網(wǎng)絡(luò)本身不當(dāng)作一個(gè)"黑箱"處理全网男人的天堂网站，網(wǎng)絡(luò)的參數(shù)值由網(wǎng)絡(luò)中實(shí)現(xiàn)的映射函數(shù)來確定色色亚洲视频，該網(wǎng)絡(luò)模型具有聯(lián)想記憶、容錯(cuò)性人人插人人操人人摸、模式識(shí)別和奇異濾波等一系列智能信息處理的基本功能www.99riav.com-。

As early as the early 1990s, conducting large-scale foreign Set text retrieval tests will be made on the field of automatic abstracting text structure analysis for information seized request area to enhance the retrieval accuracy, and have done a series of studies, presents a simple and effective logic of the division algorithm : TextTiling algorithm.

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On the presentation of Mn-P fixation, this paper reviews the latest advances in recent 10 years and concentrates on the mechanism of phosphorus fixation in acid soils. In addition, it brakes through the classical inorganic P fractionation in to Fe-P, Al-P, O-P and Ca-Pin the traditional P classification and considers Mn-P as one of the main phosphorus fixation modes in latosols, cultivated from the parent basalt material. Furthermore, fixation of P by Fe, Al, Mn is compared, and differentiation from chemical availability and bioavailability of P discussed. Based on the above, this paper presents some alienable measures for enhancing P utilization efficiency and postulates pivotal future research directions in the field of P fixation.

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