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In this dissertation, first, based on theory of cutting tooth about the gleason spiral bevel gear, the equation of meshing in the process of cutting tooth, the surface equation of generating gear as well as the general tooth surface equation of the double circular arc spiral bevel gear, using GB12759-1991 type of double circular arc gear as a basic gear profile, a three-dimension solid model of double circular arc spiral bevel gear which has the good adaptability was carried out by used of Unigraphics software;Second, by researching of the algorithm about contact and collision as well as various contact types based upon Contacting Finite Element Method, a foundation was laid for selecting the contact type in analyzing contact stress of double circular arc spiral bevel gearing;Finally, through the connection port of PARASOLID between UG software and ANSYS/LS-DYNA software, the three-dimension solid model of double circular arc spiral bevel gearing obtained above in UG was imported into ANSYS/LS-DYNA, a finite element analyzing about contact stress of double circular arc spiral bevel gearing was carried out by applying new loading method.
本文首先基于格利森弧齿锥齿轮加工原理及切齿啮合过程中的啮合方程、产形轮齿面方程以及双圆弧弧齿锥齿轮的齿面方程,选用GB12759-1991型双圆弧齿轮基本齿廓为基准齿形,利用Unigraphics软件的建模功能,绘制了有较好适应性的双圆弧弧齿锥齿轮传动三维实体模型。其次,描述了应用有限单元法进行实体接触与碰撞问题算法的公式,研究了有限元分析中的各种接触类型以及双圆弧弧齿锥齿轮接触应力分析中所选择接触类型的依据。最后,通过UG软件和ANSYS/LS-DYNA之间的PARASOLID接口工具包,将UG软件中得到的啮合齿轮模型导入ANSYS/LS-DYNA有限元分析软件,给出一种新的加载方法,进行了双圆弧弧齿锥齿轮传动的接触应力的有限元分析。
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The photoinduced cis-trans isomerization reaction occurs after photo-irradiation of this compound, and the rate of conversion depends strongly on the polarity of solvents used.
八 研究了C5位联有含氮茋的三芳基-2-吡唑啉化合物(TPP15)的光物理行为,发现:该化合物在不同极性溶剂中的荧光量子产率值呈倒钟形状,这与在不同极性溶剂中邻近效应的大小以及吡唑啉环和含氮芪基团间的电子转移的难易程度有关。
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From pregnancy to now I have drawn nine bottles of blood, a blood test more dazzling projects, to capacity yesterday seized a doctor of color plus a 421 yuan 5 tests alone, there are three blood is found, a the urine is a post-mortem blood sugar, which add up to five tests a single block四五百Also, I do not have to pay, according to those on the 420 color, color Doppler ultrasound showed good BB, before the pumping amniotic fluid have been excluded from the BB some congenital problem.
从怀孕到现在我已经抽了九瓶血,验血的项目多得眼花缭乱,昨天去产检医生开了一张421元的彩超另加五张化验单,有三张是检血的,一张是验尿的一张是验血糖的,这五张化验单加起来又四五百块,我没有交钱,就照了那四百二的彩超,彩超结果显示BB很好,之前抽过羊水排除了BB先天性方面的一些问题。
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The results show that coal and gangue are involved in the microbial role; the quantity of inoculums is directly related to the quantities of gas and the contents of methane, at the same time it has a certain degree of impact on the contents of NO(superscript - subscript 3)-N, NH(superscript + subscript 4)-N, S(superscript 2-), SO(superscript 2- subscript 4), and metals; moreover, because of the microbial anaerobic fermentation, the contents of NH(superscript + subscript 3) are seriously substandard; overall, the group B which has a smaller proportion of gangue has a less impact to the environment compared to the group A which has a larger proportion of gangue.
结果表明:煤、煤矸石参与了微生物作用;接种物的加入量与产气量和甲烷含量密切相关,并对硝酸盐氮、氨氮、硫化物、硫酸盐和金属也有一定程度的影响;同时由于微生物厌氧发酵的关系,氨氮严重超标;矸石比例较小的B组对环境的影响略小于矸石比例较大的A组。
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Other silver dealers who reported good sales included '''Helga Matzke''', Grünwald, who sold two important 18th-century Augsburg tureens by Abraham and Christian II Drentwett to a European collector as well as a rare silver Kluftbecher, 1590, from Hamburg and '''F.
其他战绩喜人的银器经销商还有格伦瓦尔德的'''Helga Matzke''',其售出品中有两件重要的 18 世纪巴伐利亚奥格斯堡出产的带盖汤盘(由 Abraham 和 Christian II Drentwett 制作),买家为一位欧洲收藏家,以及产于德国汉堡的一件稀世的银制高脚杯(约 1590 年)。
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Histologically, the seminiferous tubules contained numerous Sertoli cells and more Sertoli-spermatozoa complexes, accompanied by the depletion of Leydig cells with deeply stained nuclei. Mature spermatozoa were stored up in the epididymis, but only a few in the efferent ducts. In the second place was testicular atrophy(32/120; 26.7%). The seminiferous tubules showed moderate to severe inactivity of spermiogenesis with evidence of only spermatogonia, spermatocytes and Sertoli cells. The Leydig cells were obviously decreased in numbers associated with decrease of lipid droplets in their cytoplasms. Testicular hypoplasia was the third disorders(22/120; 18.3%). Only a few spermatogonia and Sertoli cells appeared without any spermiogenesis. The associated changes was decreased in Leydig cells and fibrous hyperplasia in the interstitium.Epididymal stones were sometimes found(12/120; 10%). Grossly, yellowish-white nodules with various sizes and firm in consistency were observed in the epididymis and the front efferent ducts. Microscopically, the epididymal ducts were dilated with voluminous spermatozoa storage, even showed calcification in severe cases. The deposited calcium salts were stained positively by Von Kossa and Alizarin red methods.Amyloidosis was also detected in 10 roosters(8.3%). Eosinophilic, homogeneous, amyloid-like substances were deposited mainly in the testicular interstitium and the periphery of blood vessels. These substances showed positive reaction by Congo red staining. Five roosters(4.2%)had Marek's lesions in the testis, epididymis and peripheral nerves with infiltration of pleomorphic lymphocytes. Only one case showed epithelial necrosis of seminiferous tubules accompanied by fibrous proliferation in the interstitium.
结果发现,在总共搜集的120个病例中,其中因年老所导致的产精力不佳为最多,占38例(31.7%),於镜下可见大量精虫黏附於Sertoli cell的表面,并可见Sertoli cell数量明显增多而Leydig cell明显减少,且其细胞核呈现浓染的现象,而在其副睪中仍可见到成熟精虫蓄留於管腔中,但在其输精管内却只有少量精虫存在;其次为睪丸萎缩,占32例(26.7%),镜下可见中度至重度无造精作用,其生精小管中只见到精母细胞、精原细胞及Sertoli cell存在,但Leydig cell数量明显减少且其细胞质内的脂质也明显减少;睪丸发育不全,占22例(18.3%),於生精小管内只见到精母细胞及少量Sertoli cell存在,不见造精细胞分化,於生精小管间质可见Leydig cell减少并伴随结缔组织增生;副睪结石,占12例(10%),肉眼下可在副睪及输精管前段见到黄白色大小不一的结节,触感坚硬,於镜下可见副睪管扩张并有大量成熟精虫蓄积,严重时可见钙化现象,以Von Kossa及茜素红染色均呈阳性反应;类淀粉沉著症,占10例(8.3%),镜下在睪丸间质及血管周围可见粉红均质样的物质沉积,以刚果红染色成阳性反应;马立克病,占5例(4.2%),镜下可在睪丸、副睪实质及周边神经内均可见到嗜碱性大小不一的淋巴样细胞浸润;睪丸坏死,占1例(0.8%),镜下可见生精小管上皮细胞坏死脱落及间质结缔组织增生。
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Biological characteristics of the pathogen and the resistance of 13 cultivars of tea plant to tea brown blight were studied by means of natural infection in the field and artificial inoculation in vitro. Resistant cultivars and susceptible cultivars of tea plant were divided. And the resistance mechanism was researched tentatively. The findings are as follows: 1 Some biological characteristics of the pathogenic fungus The experiment result showed: the optimum temperature for the growth of fungus mycelium was from 24 to 27℃, the optimum temperature for sporulation ranged 22 to 30℃. Treated at 54℃ in 10 minutes, the spores didn't germinate. The optimum pH for the growth of the mycelium was 5.1~5.9, the optimum pH for sporulation ranged 5.0~6.0. Light had no much effect on the growth of fungus mycelium, but had much effect on the reproduction of the spore.
首先,研究了茶云纹叶枯病病菌的生物学特性;其次,通过田间抗性调查和室内人工接种鉴定,对 13 个茶树品种进行了抗病性鉴定;第三,在前人研究的基础上,对茶树抗病机理作了更深入的研究,结果发现: 1 病原菌的生物学特性病原菌的分生孢子萌发的最适温度范围为 24~27℃,菌丝生长的最适温度范围为 22~30℃;致死温度为 55℃;菌丝生长的最适 pH 范围为 5.1~5.9,孢子萌发的最适 pH 范围是 5.0~6.0;光照对病菌生长速度及分生孢子萌发影响不大,但对其产孢的影响很大,特别是有光照与无光照处理之间差异显著,光照有利于分生孢子的形成。
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In this experimental study firstly a sulphur-bearing alkanethiol-derivatised gold nanoparticles has been selected and prepared. The alkanethiol-derivatised gold was put in the mud-stone samples bearing terreau. In varies elevated temperature the gas products were collected by foam plastics in a special installation. The measurements on the contents of gold in foam plastics and on the composition of gas phase were carried out and the comparisons for various samples were made.
本项研究选取并制备了作者认为有地质意义的含硫的金的金属有机化合物-烷基硫醇衍生纳米金,将其添加至含有机物质的泥岩样品中,在专门设计的真空装置中用泡塑收集不同温度气相产物,分析所产生气相组成及带出金的含量并与添加氯金酸水溶液的样品进行对比。
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For ozonolysis, the SOA yield has not been changed by inorganic seed aerosol, because the products are mainly carboxylic acids, which has much lower saturation vapor pressure and thus easily undergo homogeneous nucleation or gas-particle partitioning to be in the aerosol phase.
而对于α-蒎烯臭氧氧化的过程,实验结果表明,干态硫酸铵颗粒物种子的存在对SOA产率无影响,对臭氧氧化生成的SOA分子鉴别的结果表明,可鉴别组分中有很高比例的有机羧酸类物质,这一比例远高于光氧化产物,这些有机酸具有较低的挥发性而极易形成颗粒相,并且不参与异相酸催化反应。
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Category: C Type: Firm/Hard Milk: Cow Origin: Italy POD. Named after a small town in Cuneo in the Piedmont region. Produced primarily by small-and medium- sized dairy farms of the plain of Cuneo and villages of the valley floor. Pressed, partially skim milk, 16-pound wheel. Rind is dark and paste orange-yellow. Cows that produced the milk must be fed exclusively on green grass-no silage or feed allowed. Excellent table cheese. Three varieties: soft, hardand summer-only alpine. Small amounts of sheep and /or goat milk allowed.
类别:C 类型:实/硬奶:牛奶原产地:意大利原产地保护;由Pied m o nt地区的一个小镇C u n e o得名;原产于Cu neo平原和谷底的村落的中小型奶牛场;经压制,用低脂奶生产,16磅的轮状;外壳黑色,奶酪团是橙黄色;产奶的奶牛专吃青草,不吃贮藏干草或饲料;是极好的餐桌奶酪;有三个种类:软、硬和只在阿尔卑斯夏天才有的奶酪;或以加入少量的绵羊奶或山羊奶。
- 推荐网络例句
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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.
随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。
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But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.
不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。
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Closes the eye, the deep breathing, all no longer are the dreams as if......
关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。