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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 state informatation, 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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Results 107 patients were treated with half gland and isthmic portion excision, 43 patients among which were treated with lymph node dissection ;306 patients were treated with half gland and isthmic portion and majority opposite side excision,163 patients among which were treated with lymph node dissection ;and both side of thyroid was removed with half lymph node dissection in 46 patients; 1, 3 and 5 years surviving rate of thyroid carcinoma after operation were 99.0%, 96.5% and 92.6%.
结果 单侧腺叶,峡部切除64例;单侧腺叶,峡部加同侧颈淋巴结清除术43例;单侧腺叶,峡部,对侧腺叶次全切143例;单侧腺叶,峡部,对侧腺叶次全切加同侧颈淋巴结清除术163例;双侧甲状腺全切术加一侧颈淋巴结清扫术46例;局部姑息性切除术28例。
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Chapter three is the degradation of Abamectin in soils. The results show:(1) The decomposition of Abamectin is fastest in Aquic Cambosols while slowest in Udic Cambosols in five kinds of different soils.(2) Organic matter content in soil is the most important factor which influences the degradation half-life of Abamectin in soil, and their relative coefficient arrives at 0.9323, but pH value, total nitrogen, CEC and field maximum moisture capacity correlate little.(3) Soil organic matter, soil temperature and pesticide concentration can obviously affect Abamectin degradation in soil, in addition, the degradation half-life of Abamectin in sterilized soil is far more than that in non-sterilized soil, which maybe contributes to microorganism in soil. Chapter four is the microbial degradation of Abamectin.
第三章研究了阿维菌素在土壤中的降解,结果表明:(1)五种不同类型土壤中,阿维菌素在潮湿雏形土中降解最快,而在湿润雏形土中降解最慢;(2)土壤有机质含量与阿维菌素半衰期相关性较强,相关系数为0.9323,而土壤酸碱度、总氮含量、阳离子交换量和田间最大持水量等因子与阿维菌素半衰期相关性较小,说明影响阿维菌素在土壤中降解的最主要因子为有机质含量;(3)土壤有机质、土壤温度和农药浓度等因素对阿维菌素在土壤中的降解有较大影响,此外灭菌条件下其降解半衰期远大于未灭菌时的半衰期,这表明阿维菌素在土壤中的降解可能和土壤微生物有关。
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The highest fruit set percentage was obtained when hand-pollination was done in one day (at the stage of half opened petals) before the anthers naturally dehisced. Hand-pollination could increase fruit set from 2 days to 4 hours (at the stage of tiny dehiscent petals to over half-opened petals) before the anthers naturally dehisced. The pistil compatibility was strong and fruit set percentage with hand-pollination was the highest one day before the anthers naturally dehisced (at the stage of half-opened petals).
从花药自然裂开前2 d到自然裂开前4 h(相当于花瓣呈微张开到超过半张开状态),雌蕊都具有容受性,这期间进行人工授粉能提高坐果率,但以花药自然裂开前l d(相当于花瓣呈半张开状态时),雌蕊容受性最强,人工授粉坐果率最高。
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By applying the drop testing machine to automatically simulate half-sine pulse,the calculating model was set up to describe the course of half-sine pulse generated by the rubber waveform generator,based on the basic mechanical principle of half-sine pulse generation and non-linear of the rubber waveform generation in the condition of quasi-static compress.
采用跌落式冲击试验机机械模拟半正弦冲击波,以半正弦冲击波形产生的基本力学原理以及橡胶波形发生器在准静态压缩情况下的材料非线性为基础,建立描述橡胶波形发生器生成半正弦冲击波过程的理论计算模型。
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Kutuzov simply shrugged his shoulders when they came to him one after another with projects of manuvres with the ill-shod, half-clothed, and half-starved soldiers, whose numbers had in one month dwindled to one-half without a battle, and who would even, under the most favourable circumstances, have a longer distance to traverse before they reached the frontier than they had come already.
当库图佐夫接到一个接一个的这种拙劣的作战计划时,他只耸耸肩:要执行这些计划,就要使用那些穿着破鞋、没有皮衣、饿得半死,在一个月中没有打仗就减少了一半的士兵,而且即便在最好的条件下继续追赶到边境。前面的路程比已经走过的还要远。
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Kutuzov simply shrugged his shoulders when they came to him one after another with projects of manuvres with the ill-shod, half-clothed, and half-starved soldiers, whose numbers had in one month dwindled to one-half without a battle, and who would even, under the most favourable circumstances, have a longer distance to traverse before they reached the frontier than they had come already.
当库图佐夫接到一个接一个的这种拙劣的作战计划时,他只耸耸肩:要执行这些计划,就要使用那些穿着破鞋、没有皮衣、饿得半死,在一个月中没有打仗就减少了一半的士兵,而且即便在最好的条件下继续追赶到边境。
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Half. We face a half-opened flowers, the dark half of the wing-dropping, we are gay, but we are human beings, or in such manner of a normal social life, looking at normal people, we must demonstrate our sun, we have to pretend love the sun, pretending to hate the dark, may our hearts are so yearning for darkness, hate the sun.
一半。 我们的脸上一半开出花朵,一半永坠黑暗,我们是gay,但我们也是人,还是在这样正常的社会苟且的活着,看着正常的人们,我们要表现出我们的阳光,我们要假装热爱太阳,假装讨厌黑暗,可我们的内心是那么的向往黑暗,讨厌阳光。
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The main process machinery and equipment are:(1) hit halo hemp electrical appliances, due to livestock and poultry species, varieties vary;(2) assassination put Xuedao, because different types of livestock and poultry, knives of different sizes, in order to ensure that medical and consumption of blood cleaning hollow knife can be used;(3) peeling or burning hair back hair machinery and equipment, medium and large slaughter plant machinery stripped of pigs, cattle, sheep skin, small factories and individual butcher knife while peeling by hand, Mao 60-68 ℃ hot hot hot flooding 3-8 minutes, easy to back hair, animal hair may be back with a different machine back hair;(4), cut open, cuts except internal organs, cutting off their heads and trimming hooves many different processes such as cutting tools complete with manual and electric saws and a half split two ways , hand-split and a half with machetes, saws chop and a half should be washed clean bone debris.
主要工序机械设备是:(1)击晕麻电器,因畜禽种类、品种不同而异;(2)刺杀放血刀,因畜禽种类不同,刀的大小也不同,为保证医用和食用血液的清洁,可采用空心刀;(3)剥皮或烫毛退毛机械设备,大中型屠宰厂用机器剥去猪、牛、羊的皮,小厂和个体屠户则用手工刀具剥皮,烫毛用60—68℃热水浸烫3—8分钟,便于退毛,畜禽均可用不同的退毛机器退毛;(4)开膛、剖除内脏、割头蹄和修整等工序多用不同的刀具完成,劈半有手工和电锯两种方法,手工劈半用砍刀,电锯劈半后应将骨屑冲洗干净。
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When seeing half-full water in a glass,an optimist will say it's half-full;the pessimist will say it's half-empty.
乐观者会认为装着一半水的水杯还有半杯水,悲观者则认为只剩半杯水。
- 推荐网络例句
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We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.
索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称;三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起,称之为挽歌体诗人或者史诗诗人,他们被称为诗人,似乎只是因为遵守格律写作,而非他们作品的模仿本质。
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The relationship between communicative competence and grammar teaching should be that of the ends and the means.
交际能力和语法的关系应该是目标与途径的关系。
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This is not paper type of business,it's people business,with such huge money involved.
这不是纸上谈兵式的交易,这是人与人的业务,而且涉及金额巨大。