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This paper presents an IFMC CAD model that consits of a geometry model and a material model, in which the geometry space acts as a base space and the material space acts as a bundle space. In this CAD model, the geometry model is based on the non-manifold model. In addition, a half-face data sturucture, which is derived from the half-edge data structure with the non-manifold feature of IFMC taken into account, is adopted to represent the geometry and topology information of the component.For the material model of IFMC, this paper focuses on the FGM component representation firstly and present a simplex-subdivision based CAD data exchange format, in which the material information is represented as a (n-1) simplex and material .distributing feature is represented by the interpolation on the simplex-subdivision. Based on those, a part-building orientation optimization algorithm and an adaptive slicing algorithm for FGM component are presented in the paper.For the IFMC material model, the IFMC material information representation is divided into a meso-scale and a macro-scale representation. In the meso-scale, a concept named parameterized periodic functional meso-structure is presented as a unique form to represent the FGM (the homogeneous materials are regarded as a special FGM), the composite and the functional meso-structure material. The model of PMS is a three-tuple that contains the space stateinformatation, the material parameter and the material meso-scale distribution feature. The macro-scale material information representation is similar to the FGM components by interpolation of the control parameter of the periodical functional meso-structure based on the simplex-subdivision.Through an example of manufacturing-oriented IFMC CAD data processing, it is proved that the IFMC CAD model and the material information representation and process method proposed in this paper can provide a reliable data support for IFMC digital concurrent design and manufacturing.
本文将理想材料零件CAD模型建立在以几何空间为底空间、以材料空间为丛空间的结构上,使用非流形几何模型作为理想材料零件几何拓扑模型的基础,并在半边数据结构基础上,针对理想材料零件的非流形特征局限内部边界上的特点,给出了一个半面数据结构来表述零件的几何拓扑信息;对于理想材料零件的材料模型,本文先从功能梯度材料零件的信息表述与CAD数据交换和处理入手,将材料信息表述为(n-1)维单纯形,然后通过对三维几何区域的单纯剖分,以插值的方式表述零件材料分布特征;在此基础上,根据功能梯度材料零件分层制造中对CAD数据处理的要求,给出了综合考虑零件几何特征与材料特征的生长方向优化算法和自适应切片算法;而对于文中所定义的理想材料零件,本文将其材料信息表述分解到细观和宏观两个尺度进行,首先给出了细观尺度上参数化的周期性功能细结构概念,以此来统一表述功能梯度材料(单质材料作为特殊的功能梯度材料看待)、复合材料和功能细结构材料;把周期性功能细结构模型化为一个包含空间状态信息、材料构成参数和材料细观分布特征参数的三元组,以表达零件的细观材料特征;对于零件宏观的材料变化特征,则同样在几何区域单纯剖分的基础上,通过对细观尺度上周期性功能细结构控制参数的插值来完成;通过理想材料零件CAD数据处理的算例,验证了本文中理想材料零件CAD模型及材料信息表述与处理方法完全可以为理想材料零件的数字化制造提供可靠的数据支持。
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As the track space increasing, the holding power which flexible holding parts act on sugarcane is dropping off. As the canvas layers and length of flexible holding part increasing, the track space is also increased when flexible holding parts act on sugarcane same holding power. As the length of flexible holding part increasing, the rate of slope of holding power following the track space to change would be decreased, so holding power would vary slowly. The holding power has a better linear relationship with the track space. Holding sugarcane stalk on knot or not on knot, sugarcane stalk having leaves or without leaves, the holding power would have not significant difference. Considering the structure of device and stress of sugarcane, 4-layers canvas conveyer belt was used as flexible holding part, while its length is 120mm, 160mm, or 200mm, the corresponding maximum track space is 135mm, 183mm, or 235mm. Experimental investigation of sugarcane windrowing was done on the arc-track-type flexible holding and conveying test mechanism.
随着轨道间距的增大,柔性夹持元件施加给甘蔗的夹持力逐渐减少;施加给甘蔗相同的夹持力,随着柔性夹持元件帆布帘层数和长度的增加,对应的轨道间距增加;随着柔性夹持元件长度的增大,柔性夹持元件施加给甘蔗的夹持力随轨道间距变化的斜率减小,夹持力大小的变化越缓慢;柔性夹持元件提供的夹持力与轨道间距均呈线性关系;柔性夹持元件夹在甘蔗节上还是不夹在节上,甘蔗有叶还是无叶,其施加给甘蔗的夹持力无显著差异;从夹持输送装置结构以及甘蔗的受力情况来考虑,选择4层帆布帘输送带作为柔性夹持元件更能平稳、柔和地夹持输送甘蔗,4层帆布帘120mm、160mm、200mm长的柔性夹持元件夹持甘蔗所需最大轨道间距为135mm 、183mm、235mm。
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Through capital gains tax and income tax differences between analysis and on readjustlnents in respect of the levy of a capital gains tax status and on the stock market, with emphasis on the sensitivity of meaning from the actual demonstration of levying capital profits tax on the feasibility of upcoming trends, while the levy of a capital gains tax on the limitations of China's securities, taxation should be elaborated in accordance with the tax burden of the principle of fairness for reform is to establish harmonious socialist society.
通过对资本利得税与所得税之间的差异分析和对目前我国就开征资本利得税现状及其对证券交易市场敏感性的探讨,着重从实际意义方面论证我国开征资本利得税的可行性趋势,同时提出近期开征资本利得税的局限,阐述我国证券税制应按照税负公平原则进行改革,是建立社会主义和谐社会的必然要求。
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In accordance with the relevant provisions of the Administrative Supervision Law of the People's Republic of China, the Work Safety Law of the People's Republic of China and the Regulations on the Reporting, investigation and Handling of the Accidents Disrupting Production Safety, the Ministry of Supervision has, by earnestly fulfilling its administrative supervision functions and responsibilities, joined relevant departments in seriously closing the cases of the 5 major accidents which are: an extremely serious road traffic black powder explosion in Shangrao, Jiangxi Province on March 17, 2005, an extremely serious fire accident in Nanshan Coalmine in Lingshi County of Jinzhong City of Shanxi Province on November 12, 2006, an extremely serious steel ladle capsizal accident at Qinghe Special Steel Co. Ltd. in Tieling City of Liaoning Province on April 18, 2007, a major methane explosion accident at Pudeng Coalmine in Linfen City of Shanxi Province on May 5, and an extremely serious bridge collapsing accident over Dixituo River in Fenghuang County of Hunan Povince.
根据《中华人民共和国行政监察法》、《中华人民共和国安全生产法》、国务院《生产安全事故报告和调查处理条例》等法律法规的规定,监察部认真履行行政监察职责,会同有关部门严肃查处了江西上饶"3.17"道路交通黑火药爆炸特别重大事故、山西省晋中市灵石县南山煤矿"11.12"特别重大火灾事故、辽宁省铁岭市清河特殊钢有限公司"4.18"钢水包倾覆特别重大事故、山西省临汾市蒲邓煤矿"5.5"重大瓦斯爆炸事故、湖南省凤凰县堤溪沱江大桥"8.13"特别重大坍塌事故等5起事故。
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I once had a friend called Grunwalski. We were sent to Siberia together. When you go to a Siberian work camp, you travel in a cattle car. You roll across icy steppes for days, without seeing a soul. You huddle to keep warm. But it's hard to relieve yourself, to take a shit, you can't do it on the train, and the only time the train stops is to take on water for the locomotive. But Grunwalski was shy, even when we bathed together, he got upset. I used to kid him about it. So, the train stops and everyone jumps out to shit on the tracks. I teased Grunwalski so much, that he went off on his own. The train starts moving, so everyone jumps on, but it waits for nobody. Grunwalski had a problem: he'd gone behind a bush, and was still shitting. So I see him come out from behind the bush, holding up his pants with his hands. He tries to catch up. I hold out my hand, but each time he reaches for it he lets go of his pants and they drop to his ankles. He pulls them up, starts running again, but they fall back down, when he reaches for me.
我曾经有个叫Grunwalski的朋友我们一起被派去西伯利亚,当你去西伯利亚的一个工作营地,你必须乘坐一辆牲口车,你整天穿行在冷冰冰的西伯利亚大草原上,连个鬼都看不见你为了取暖缩成一团这几乎不能让你感到好受些,你不能在火车上方便,唯一的机会是在火车停下来为机车加水的时候才可以可是Grunwalski很害羞,甚至是我们在一起洗澡的时候,他都有些尴尬我过去经常嘲笑他于是,当火车停下来每个人都跳出去在铁轨上方便的时候我狠狠地挖苦Grunwalski,他走开了一个人在那儿火车开动了,每个人都跳上了火车,它不会等人的Grunwalski遇到了麻烦:他已经去了丛林后面,而且还在方便所以我看见他从丛林里出来,用他的双手提着裤子他想赶上火车我伸出手,可是每一次他够到我的手时他的裤子就要掉下来一直掉到他的膝盖上他提起了裤子,重新追上来,但是当他抓住我的时候,裤子又掉了下来
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On the basis of the properties of central projection and orthographic projection, the differences of different rectification approaches based on orthographic projection are explained, and it is suggested that oblique-plane-rectified photograph can produce orthographic representation of flat terrain cover; differential rectification of RS imagery based on DEM can produce orthographic representation of waved terrain cover; and true orthographic rectification based on digital ground-object model can produce orthographic representation of single objects on ground.
根据中心投影和正射投影的特点,从理论上说明了不同正射投影纠正方法之间存在的差异,认为:基于透视变换的像片倾斜纠正可生成水平地表覆被的正射投影表达;基于DEM的正射影像微分纠正可生成起伏地表覆被的正射投影表达;基于数字地物模型的真正射纠正可生成独立地物的正射投影表达。
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A fact that does not dispute is, in recent years, on the net " evil do ", on the piracy on the bilk on net chromatically affection, net, net, net the as one falls such as the holiday is built on calumniatory, net, kill in already becoming public numerous life greatly --" net heart " be short of break become a very real difficult problem.
一个不争的事实是,近年来,网上"恶搞"、网上色情、网上诈骗、网上剽窃、网上诽谤、网上造假等此起彼伏,已成了公众生活中的一大害——"网德"缺失成为一个很现实的难题。
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The segment arrangement on circular curves has proven theoretical support; the segment arrangement on transition curves, however, has no theoretical support and is usually executed by means of VMT systems equipped on shield machines. On basis of the relevant survey theories and the actual conditions of the turning rings, the author probes into the segment arrangement on transition curves in the paper.
对于圆曲线的管片排版已有了相对较为成熟的理论,而缓和曲线上的管片排版以往通常是根据盾构机VMT来选择,没有成型的理论支持,为此,结合测量理论和弯环管片的实际,探索出在缓和曲线上准确选择弯环管片理论排版的方法。
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Poor and the boy was then placed on the altar and was about tobe knifed when a ram with golden fleece was sent down by thegods and carried off the two children on its back.as they flew over the strait that divides asia from europe,helle,faint at the vast expanse of water below ,fell into the sea and was drowned.thus the sea of helle,hellespont, became the ancient name of the strip of water.her brother kept on and arrived in colchis on the eastern shore of the black sea.there he sacrificed the ram to zeus and who nailed it on a sacred tree and put a sleepless gave its golden fleece to king aeetes, dragon in charge .
当他们飞过隔开欧洲和亚洲的海峡时,赫勒由于看到浩瀚的海洋而头晕目眩,最终掉进大海淹死了。这片海洋古时候的名称叫赫勒之海,赫勒拉旁海峡便由此而来。金色公羊驮着法瑞克斯继续向前飞去,来到了黑海东岸的科尔契斯。在那里,法瑞克斯将公羊献给了宙斯;而将金羊毛送给了埃厄忒斯国王。国王将羊毛钉在一棵圣树上,并派了一条不睡觉的龙负责看护。
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It has been observed that the presence of weldlines significantly reduces the mechanical property of injection molded parts . Therefore, in recent years, the analysis on injection molded parts with weldline obtains global concerns, this is. on the one hand , due to large-scale complex parts gradually manifold , on the other hand, the people desires on the appearance and internal performance of parts are increasing high , how to enhance the performance on the weldlind area becomes investigative emphasis .
因为熔接线的存在显著地减少注射制件的力学性能,因此,近些年来,对注塑制品熔接线的分析得到了普遍的关注,这一方面是由于大型复杂制件的逐渐增多,另一方面是人们对制品的外观和内在性能要求越来越高,如何提高制品熔接线区域的性能成为研究的重点。
- 相关中文对照歌词
- On And On And On
- On And On
- On And On
- Keep On Keepin' On
- Run On And On And On
- Come On Come On Come On
- On & On & On
- On And On And On
- On & On & On
- On And On And On
- 推荐网络例句
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This one mode pays close attention to network credence foundation of the businessman very much.
这一模式非常关注商人的网络信用基础。
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Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.
扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。
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There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.
双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。