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Single factor experiments were done with the factors including the width of protrusion and the trolley's velocity, which showed that the surface frictional coefficient decreases with the width of protrusion increasing, and doesn't change with the trolley's velocity changing, which was consistent with the results of the orthogonal experiment. A theoretical model of the horizontal projection of a corrugated bionic surface's contact area was built, which showed that the contact area's horizontal projection decreases with width and interval increasing respectively and that the ratio of the contact area's horizontal projection and the vertical load decreases with the vertical load increasing. It indicated that the surface frictional coefficient decreases with the above three factors increasing respectively. Finite element modeling and analysis of interactions of a plate and soils was done using ANSYS, which showed that the plate frictional coefficient is little relative to soil elastic modulus and decreases with vertical surface pressure and that trolley's pull and vertical displacement of bionic surface's control pilot keep constant almost during the plate being pulled. Finite element modeling and analysis of interactions of a corrugated bionic surface and soils was done using ANSYS, which showed that surface frictional coefficient is little relative to soil elastic modulus and decreases with bionic surface's structural parameters and vertical pressure increasing. However, the three factors all didn't affect the surface frictional coefficient remarkably on the condition of 90% dependability. For the first time, bionic surfaces were applied to screw piles, which formed bionic screw piles, and the contrast experiments showed the bionic screw pile had certain resistance-decreasing effects.
建立了波纹型仿生曲面与土壤的接触面积的水平投影的理论模型,表明接触面积的水平投影A随着波纹型仿生曲面突起宽度、两相邻突起间距的增大而减小,接触面积的水平投影与波纹型仿生曲面表面垂直载荷之比随着波纹型仿生曲面表面垂直载荷的增大而减小,进而得出仿生曲面摩擦系数随着波纹型仿生曲面突起宽度、两相邻突起间距以及表面垂直载荷的增大而减小;利用ANSYS软件对平板与土壤的相互作用进行了有限元建模与分析,表明平板摩擦系数与土壤弹性模量关系不大,而随着表面垂直载荷的增大而减小;平板牵引过程中台车牵引力和仿生曲面控制节点垂直方向位移基本保持不变;利用ANSYS软件对波纹型仿生曲面与土壤的相互作用进行了有限元建模与分析,表明波纹型仿生曲面系数在一定范围内基本不受土壤弹性模量的影响,随着波纹型仿生曲面突起宽度、两相邻突起间距以及表面垂直载荷的增大而减小,但在可信度为90%的前提下,三个因素影响都不显著;首次将波纹型仿生曲面应用于与土壤作用方式以挤压为主的螺旋桩,形成仿生螺旋桩,并与普通螺旋桩进行了沉桩对比试验,表明波纹型仿生曲面应用于螺旋桩桩体表面具有明显的降阻作用。
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Upon this, I told him the first Thing we had to do, was to stave the Boat, which lay upon the Beach, so that they might not carry her off; and taking every Thing out of her, leave her so far useless as not to be fit to swim; accordingly we went on board, took the Arms which were left on board, out of her, and whatever else we found there, which was a Bottle of Brandy, and another of Rum, a few Bisket Cakes, a Horn of Powder, and a great Lump of Sugar, in a Piece of Canvas; the Sugar was five or six Pounds; all which was very welcome to me, especially the Brandy, and Sugar, of which I had had none left for many Years.
于是,我告诉他,我们首先应该把搁浅在沙滩上的那只小船凿破,把船上所有的东西都拿下来,使它无法下水,他们就无法把它划走。于是我们一起上了小船,把留在上面的那支枪拿了下来,又把上面所能找到的东西通通拿下来。其中有一瓶白兰地,一瓶甘蔗酒,几块饼干,一角火药,以及一大包用帆布包着的糖,大约有五六磅重。这些东西我都非常需要,尤其是糖和白兰地,我已吃光好多年了。
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That innocent bud which opens, that adorable half-nudity which is afraid of itself, that white foot which takes refuge in a slipper, that throat which veils itself before a mirror as though a mirror were an eye, that chemise which makes haste to rise up and conceal the shoulder for a creaking bit of furniture or a passing vehicle, those cords tied, those clasps fastened, those laces drawn, those tremors, those shivers of cold and modesty, that exquisite affright in every movement, that almost winged uneasiness where there is no cause for alarm, the successive phases of dressing, as charming as the clouds of dawn,-- it is not fitting that all this should be narrated, and it is too much to have even called attention to it.
这纯洁的床被慢慢掀开,对着这可赞叹的半裸连自己也感到羞怯,雪白的脚躲进了拖鞋,胸脯在镜子前遮掩起来,好象镜子是只眼睛,听到家具裂开的声音或街车经过,她便迅速地把衬衣提起遮住肩膀。有些缎带要打结,衣钩要搭上,束腰要拉紧,这些微微的颤动,由于寒冷和羞怯引起的哆嗦,所有这些可爱的虚惊,在这完全不必害怕的地方,到处有着一种无以名之的顾虑。穿着打扮的千姿百态,一如曙光中的云彩那样迷人,这一切本来不宜叙述,提一提就已嫌说得太多。
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From this starting point,Aronrefuses both idealism,which protest unconditionally univeral peace,and realism,which assertspower politics,but advocates antinomic prudence,which recognizes both the antinomybetween unversal peace and particular interests of states,which make it necessary to supportinternationa normals with force,and the aspect of humanity which hope for peace,whichrequires states to admit multiplicity,and make some concession in a case if necessary,so as tokeep the world peaceful in the short run and the long run.
由此出发,阿隆既反对抽象地主张世界和平的理想主义,又反对主张强权政治的现实主义,而主张二律背反的审慎理性:既要注意到普遍和平与各国利益之间的二律背反,以武力支持国际规范的执行,又要注意到人性追求和平的一面,承认世界的多元性,并在一定条件下做出让步,才能维护和发展世界和平。
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The sixteen plants are firstly divided into six types according to evaluation grades and subject function statistical method:the first type is Cajanus cajan and Crotalaria mucronata,the best adaptability ,which can be used pioneer plant or constructive species; the second type is Cynodon dactylon,the better adaptability, which can be used constructive species ;the third type is Eragrostis curvula, Paspalam notatum,which can be used constructive species on rotten rock slope ; the forth type is kummerowia striata,Lotus corniculatus and Vitex negundo.The adaptability is centered,and can be used protection species and auxiliary species;the fifth type is Robinia pseudoacacia,Eremochloa ophiuroides,Vitex negundo,Lespedeza formosa,Leucaena leucocephala,Desmodium sequax, Rhus chinne- nsis,which can't be plant singly and be used accessory species;the sixth is Trifolium repens,which can be used pioneer plant.
根据评价边坡防护植物适应性的十个重要指标,首次运用隶属函数和聚类分析方法,对各供试植物的边坡适应性综合排序并分为六类:第一类为木豆和猪屎豆,边坡适应性最强,适宜作为先锋植物和建群种;第二类为狗牙根,边坡适应性强,适宜与豆科植物混播,作为建群种;第三类为弯叶画眉草和百喜草,边坡适应性较强,适宜与豆科植物混播,作为风化岩边坡的建群种;第四类为鸡眼草、百脉根和马棘,边坡适应性中等,适宜作为保护种与伴生种;第五类为刺槐、假俭草、荆条、美丽胡枝子、银合欢、波叶山蚂蝗和盐肤木,边坡适应性较差,不宜单独在边坡上种植,最好与速生型豆科草本混播,作为边坡防护植物群落的辅助植物;第六类为白三叶,边坡适应性最差,但因其出苗率高、生长速度快,作为先锋植物,起到前期覆盖坡面的作用。
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The category and number of arguments in the semantic structure of sentences in modem Chinese are represented as follows: 1 Subject, which is composed of agent, causer, sensor, possessor, carrier 2 Object, which is composed of patient, factitive, position, undertaker, causee, phenomenon, involvement, attribute 3 Alternative participant, which is composed of recipientlsource, collaborator 4 Complement The predicate and the argument constitute the basic predication structure, which becomes an extended predication structure in the presence of an adverbial argument, which is an optional semantic constituent in the semantic structure.
为此,本文把现代汉语动词按其跟相关语义成分的依存关系首先分为动作动词、致使动词、心理动词、性状动词、关系动词5大类,以确定各主事动元的类别;第二层级按动核所带动元的数量,对各类动词进行下位分类,分别得出一元动词、二元动词、三元动词,以显示动核所带动元的数量:第三层级按动核所带动元的性质和数量把现代汉语动词分为24个基本类,以确定动元即必有语义成分的基本类别和数量。
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1Niche construction can lead to stable coexistence of diverse genotypes in spatially structured population, which supports a stable polymorphism even without heterozygote superiority.(2)With habitat deterioration, niche construction accelerates the formation of steady polymorphism and hence impedes the harmful influences of environment on the population, which might embody a life-history strategy of organism under the unfavorable environment.(3)Niche construction results in the coexistence with alternative polymorphism through genotype-environment feedback and limited gene flow.(4)The niche-constructing organism is an active force to alter its environment and hence the direction of natural selection in order to better survival.(5)Spatial dynamics and distribution pattern of metapopulation are profoundly influenced by time-lagged niche construction.(6)Metapopulation size can reach a fixed level in the recency effect and equal weighting of time lag but is statistical stability in primacy effect, which implies the primacy effect is most remarkable.(7)The increment in the relative weightingof each generation\' niche construction and the length of time lag are significant factors for system destabilization.(8)Moderate capacity of positive niche construction benefits the metapopulation persistence.(9)The narrowing of niche breadth can decrease the metapopulation size and thereby increase the extinction risk.(10)The coupled function of time lag and niche construction make the system oscillation and generate the spiral wave, spiral-broken and circular wave in heterogeneous habitat.The spatial distributions of metapopulation and resource content are complementary due to a phase lag of their both frequencies.(12)Metapopulation persistence with niche construction depends not only on the balance between colonization and extinction, but also on the balance between the ability of niche construction and natural dissipation of habitat.(13)Metapopula-tion can survive under certain condition when the percent of suitable patches in habitat is lower than the ration of extinction to colonization.(14)Two thresholds exist in the process of transition of habitat quality dynamics from unsuitable to suitable, which include the intensity of niche construction and the initial condition of system.(15)Metapopulation size is positive correlated with the ability of positive niche construction, which means that organism or population who has strongly positive influences on their environment plays an important role to maintain the available habitat.
通过上述几个方面的研究,主要得出以下15条结论:(1)生态位构建可使空间结构种群,甚至是在没有杂合子优势的条件下,形成多种可能的稳定基因型分布模式;(2)随着环境的破坏与恶化,种群的生态位构建作用加速其较早形成稳定多态以阻碍环境对种群的不利影响,解释了有机体在不利环境下的一种生活史对策;(3)生态位构建作用通过基因型—环境反馈机制及有限的基因交流导致基因型多态的稳定共存;(4)有机体的生态位构建作用是一种积极的动力改变环境进而改变其自然选择的方向;(5)生态位构建的时滞作用对集合种群动态和空间分布产生深刻影响;(6)集合种群大小在时滞的崭新效应和等权重效应下达到一固定值,而在首位效应下达到统计稳定,表明首位效应的影响最显著;(7)首位效应下生态位构建相对权重的增量和时滞的长度是影响系统不稳定性动态的关键因素;(8)适中的生态位构建强度有利于集合种群的续存;(9)生态位宽度变窄会减少集合种群的数量从而增加其灭绝风险;(10)时滞和生态位构建的双重作用使系统产生周期振荡,并在异质性环境中产生稳定的螺旋波,破碎的螺旋波和环形波三种分布模式;(11)集合种群与资源含量的空间分布因为相滞而互补;(12)具有生态位构建的集合种群续存不仅取决于侵占率与灭绝率之间的平衡,而且依赖于生态位构建能力同其生境的自然消耗速率之间的妥协;(13)当生境中适合侵占的斑块比例小于其侵占率与灭绝率之比时,生态位构建作用促使集合种群在一定条件下续存:(14)生境斑块的状态从不适合到适合转变过程中存在生态位构建强度和系统初始条件这两个阈值;(15)集合种群的大小同正生态位构建能力正相关,意味着对环境具有较强正作用的有机体对维持有效生境起积极作用。
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The microwave oven of the present invention comprises a cavity assembly which defines a cooking chamber therein and functions as a framework of the microwave oven, an outer casing which includes a top portion and side portions formed at both ends of the top portion to enclose the cavity assembly and interior parts and is provided with convexo-concave reinforcements at the top portion and at least one side portion, a door of which one side is connected to the cavity assembly to be a pivot center and which selectively causes the cooking chamber to be open and close, and a back plate which defines a rear face of the cavity assembly and is provided with a convexo-concave reinforcement formed along at least one edge portion thereof.
本发明中的微波炉包括:空腔组件,其中限定烹饪室,并用作微波炉的主框架;外壳,其包括一个顶部部分和形成在顶部部分两端的侧面部分,用来围住空腔组件和内部的部件,在顶部部分和至少一个侧面部分设置凸凹面的加固件;门,其一侧和空腔组件相连作为枢轴中心,所述门可以选择性的将烹饪室打开和关闭;以及后面板,其限定空腔组件的后表面,设有在沿着其至少一个边缘部分形成的一个凸凹面的加固件。
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In addition, some modifications on several computational methods are also presented. Using LMTO method the electronic structure of several systems are studied, and some results are obtained. They are: The ideal Nb (100) surface has three surface states, the multi-layer relaxed surface has two surface states. The surface energy of the ideal surface is higher than that of the relaxed surface, that means that the multi-layer relaxed surface is more stable than the former one, which supports the LEED results. The mono-layer relaxed Ag (111) surface is the most stable one among several" stable surface models"presented by several researchers. The surface energy of Ag (111) surface is higher than that of surface Ag (001), which supports some experimental results such as different reaction rate at different surface orientations for the same material. The surafce states of Si (111) surface not only locate near the Fermi level, but also in the valence band, which agrees well with Cohen's conclusion. Si (111)-H is an effective model for analysing the surface states and H adsorbed on the back surface is a good method for improving the convincingness of the results obtained on thinner slab models. The surface stability depends on three different kinds of MoSi〓(001) surfaces, the surface with mono-layer Si is the most stable one, and the surface with Mo at the first layer is the most unstable one among them. These are consistant with the Kemoda's experimental results. The valence bands of clean or K adsorbed CdTe (111) surface agrees well with the synchrotron radiation studies. The surface of CdTe (111) consists of four kinds of surface models which show different surface electronic structures and different surface structure stabilities. The conclusion agrees well with Wu's experimental work. The different absorbed alkali metals on the CdTe (111) surface give different adsorption characteristics which have relations not only with the valence electrons, but also with the core ones of the alkali metals. The electonic structures of Si-C alloys are different from that of Si-Ge alloys, and the energy band gaps of Si-C alloys do not increase linearly with Carbon concentration, our conclusion supports Alexander's results, but conflicts with Soref's one.
现分述如下: LMTO方法及其应用方面:1)通过对Nb(100)表面电子态分析发现清洁理想表面有三个表面态,多层弛豫表面有两个表面态;表面能大小说明多层弛豫表面更稳定,支持了LEED结果。2)通过对采用不同方法获得的几种不同Ag(111)表面稳定结构的表面能计算分析,给出了单层弛豫表面为Ag(111)表面的最稳定结构;从Ag(111)单层弛豫表面和Ag(001)表面的表面能比较,发现了Ag(001)表面表面能要比Ag(111)小的,表明了同种物质不同表面取向将表现出不同物理、化学性质,这是与实验中得出的结论是吻合的,3)通过对Si(111)表面态分析,不仅发现了Si(111)表面不仅具有居于费米能级附近的悬挂键所对应的表面态,而且还有很多表面态位于价带能量范围内,与Cohen等结果一致,H饱和slab模型背表面相当于增加了slab层的厚度,是一有效的变相增加slab层厚的方法,弛豫表面较清洁理想表面价带谱们低能端的少许移动,预示着总能降低,说明弛豫表面较清洁理想表面稳定。4)MoSi〓具有三种表面,从费米能级上态密度值大小得到单层Si表面最稳定,Mo原子为表层原子的表面最不稳定,双层Si原子表面居中的结论,这与Kemoda等人实验结果是一致的。5)通过对CdTe(111)表面表面电子态、表面结构稳定性及表面H、碱金属吸附的电子结构系列研究,不仅得出了CdTe(111)清洁及碱金属K吸附价带谱与同步辐射光电子谱相吻合的结果,而且发现了CdTe(111)表面具有四类不同原子近邻特征,表现出四类不同的表面结构及电子结构特征:不同表面态分布、不同的表面结构稳定性(表层原子与次层原子成三键有一悬挂键的表面要比表层原子与次层原子成一键有三悬挂键稳定(与Wu等人实验结果一致))、不同的H吸附特性。
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The coordinate transformation and numerical integration was executed on the discretized tetrahedral elements based on which the 3-D MT vector-finite element method was implemented. A whole computation framework for 3-D vector-finite element method with unstructured mesh was given. Based on this some typical models were tested which has demonstrated that our algorithm could distinctively avoid problems caused by the fake solution and both the accuracy and efficiency were enhanced which made our algorithm has a bright future for further application.3. According to theory of Sobolev vector space and the discretization of Helmholtz space, the error estimate which was suitable for 3-D MT vector-finite element modeling was deduced by which the procedure of adaptive technique was guaranteed.4. Based on the fully unstructured tetrahedralization and optical strategy, the 3-D magnetotelluric h-adaptive vector-finite element method was presented through combining the error estimate. With this work, the accuracy and creditableness for 3-D MT complicatedly modeling was guaranteed.5. The 3-D magnetotelluric h-adaptive vector-finite element algorithm with unstructured mesh was implemented.
针对非结构化的四面体单元,采用坐标变换和数值积分方法,实现了MT三维矢量有限单元分析,建立起基于非结构化网格的三维MT矢量有限元计算流程,并对典型模型和国际标准电磁模型进行了数值模拟,结果对比和分析表明,基于非结构化网格的三维MT矢量有限元不仅消除了节点型有限元的伪解,而且具有很高的计算精度和速度,有广阔的应用前景。3、根据Sobolev函数的向量空间和Hemlholtz空间的分解,推导出基于残差的三维大地电磁矢量有限元后验误差估计公式,为三维大地电磁自适应矢量有限元数值模拟的实现奠定了基础。4、在完全非结构化四面体单元剖分及优化基础上,结合三维大地电磁矢量有限元后验误差估计公式,提出了基于非结构化网格的三维大地电磁h-型自适应矢量有限元计算策略,保证了对复杂大地电磁模型数值计算的精度和可靠性。5、实现了基于非结构化网格的三维大地电磁h-型自适应矢量有限元计算流程,对典型模型和国际标准电磁模型进行了数值模拟。
- 相关中文对照歌词
- Which One
- Any Which Way
- ¿Which Side Are You On?
- Bitch We Got A Problem
- Which One Of You
- Hand Of God
- Walt Whitman's Niece
- Which Of Us Is The Fool
- Love is The Groove
- Origami Crane
- 推荐网络例句
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It inculcates justification before God on the ground of human merits.
它说明在上帝灌输在地上人类优点。
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TH Leaguer has excellent Quality Control and Management System.
本公司具有完善的品管部门。
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The iron ore used to make steel comes from open-pit and underground mines.
译:炼钢用的铁矿石来自露天开采的矿山和地下矿井。