查询词典 sieve

This paper introduced the odd sieve sequence, the methods of character, estimate and triangle sum are used to study the mean value of the divisor function. An asymptotic formula of the divisor function is gave in the odd sieve sequence set to through the analytical method.

引入了奇筛数序列，主要利用特征和估计及三角和方法，研究了除数函数的均值性质，并通过解析方法给出了除数函数在奇筛数序列集合中的一个的渐近公式。

The results showed that the TEAOH possessed stronger framework-directing function during the synthesis process of SAPO-34 molecular sieve, and took up more electronegative framework positions while the morpholine mainly filled the micropore system of SAPO-34 molecular sieve.

结果表明，TEAOH在导向生成SAPO-34分子筛骨架过程中表现活跃，占据了较多的平衡骨架负电荷的位置，而吗啉主要起到填充分子筛孔道的作用。

The cortical cells had thin walls and mitochondrium, and nucleus wassurrounded by chloroplasts, and vesicles were next to cell plasmalemma. However, cellwalls of velamen, cortex and exodermis in the mycorrhiza of D. nobile had ring orpapillary thickenings in many cases. The hyphae were surrounded by moremitochondria and vesicles of plant, and the hyphae were digested and their structure waschanged at last. The cell wall of endodermis also had typical ring thickenings, and manysieve orifices in sieve tube elements of phloem were covered by callose, while therewere liaison cords in a few sieve orifices.

金钗石斛菌根的根被细胞的细胞壁多处出现环形圈，外皮层细胞壁加厚，木质化，也有环形圈存在，皮层细胞细胞壁多角形明显，加厚，皮层细胞中存在被消化、失去结构的真菌菌丝，在菌丝周围有较多的线粒体、小泡，内皮层细胞的细胞壁呈现的典型的加厚及木质化环形圈，韧皮部筛管的筛板结构，绝大多数筛孔已为胼胝质所覆盖，仅个别筛孔中还存在连络索。

The Company is committed to the production of major fencing wire mesh, shaped network isolation Net, Net framework, building products breeding and at the same time after years of development and expansion of products has been covered to: Punching Net, audio network, the loudspeaker network, noise barriers , sound-absorbing plate, microplate, screen machine, sieve, sieve films retaining block, Net shelves, plastic net, plastic net, plastic net sets, sets of plastic net, anti-theft Net, Net wall, metal wall Nets, aluminum Net, Net fiber glass married, invisible screens, battery Nets, Nets plate, Iron Net, welded wire mesh, plaster mesh, building net, hexagonal, Net hooks, cotton net, the U.S. grid, hexagonal, screw Flower Net, gill nets, with the transmission network, touch Net, Net-type seats, stainless steel wire mesh, copper Net, Net aluminum, nickel, Net, Net stock, air-conditioning filters, nylon mesh, metals and other major Net Series Products.

本公司是专业致力于生产护栏网、异形网、隔离网、框架网、建筑养殖等系列产品，同时经过多年的发展壮大生产的产品已涵盖到：冲孔网、音响网、喇叭网、隔音板、吸音板、微孔板、机筛网、筛板、筛片护拦网、货架网、塑料网、塑胶网、套塑网、套胶网、防盗网、围墙网、金属围墙网、铝板网、玻缡纤维网、隐形窗纱、电池网、钢板网、铁艺网、电焊网、批荡筛网、建筑用网、六角网、勾网、轧花网、美格网、六角网、拧花网、刺网、传送网带、碰网、席型网、不锈钢网、铜网、铝网、镍网、合股网、空调过滤网、尼龙网、金属网等各大系列产品。

These machinese are patent product(01235113.8)of our company opening up newly.it is used for white rice grading and choiceness in the rice grocessing factory.adopt the serial whole selecting cech nology.the extraction of whole rice are good;Adopt the patent (ZL99245666.5) of the sieve aperture that won't be plugged to avoid cleaning the sieve cove;set the knockdown front board to be convenient for cleaning the grume of the rice bran.

本设备是我公司最近开发的专利（01253113.8）产品，适用于碾米厂进行白米的分级精选。采用连续二次整米提取工艺，整米提取率高；采纳不堵孔筛格专利（ZL99245666.5），免于经常清理筛面；设置可拆卸前封板，便于清除筛体内糠粉粘结物。

The Si/Al ratio of NaY molecular sieve was determined by an empirical formula of lattice constant obtained by extension function method of X-ray diffraction and framework Si/Al ratio of NaY molecular sieve determined by solid nuclear magnetic resonant spectrum method.

前言晶胞参数是决定晶体结构的重要参数之一，Na Y超稳分子筛属立方晶系，由于 Na Y超稳分子筛骨架硅铝比受许多条件的影响，如投料比、晶化温度、晶化压力和晶化时间等。通过研究发现分子筛骨架的硅铝比与其晶胞参数相关，而分子筛的硅铝比可作为合成分子筛产品质量的控制指标 [1] 。

The present invention adopts the technical proposal of adopting ZSM-5 mesoporous molecular sieve raw powder with a silicon-aluminum mol ratio SiO2Al2O3 of 20 to 1000 and a weight percentage of 20 to 100 percent as well as at least one caking agent selected from SiO2, clay and Al2O3 to extrude, tablet or spray into shape; then treating for 1 to 8 hours by 0.1 to 3 mol/l of at least one ammonium liquor from ammonium nitrate, ammonium chloride or ammonium sulphate or 0.1 to 8.5 mol/l of at least one acid liquor from muriatic acid, nitric acid, vitriol or acetic acid under a temperature of 20 to 90 DEG C; then using steam to treat for 2 to 15 hours under the temperature condition of 400 to 700 DEG C; using a liquor of 0.1 to 3mol/l selected from at least one of oxalic acid, citric acid or maleic acid under a temperature condition of 20 to 90 DEG C to dip for 2 to 5 hours to obtain the modified molecular sieve catalyst, thus better solving the problems.

本发明通过采用硅铝比SiO2/Al2O3为20～1000重量百分比计20～100％的ZSM-5介孔分子筛原粉与余量的选自SiO2、粘土或Al2O3中至少一种粘结剂挤条、压片或喷球成型；再经过0.1～3摩尔/升选自硝酸铵、氯化铵或硫酸铵中的至少一种铵溶液或0.1～8.5摩尔/升选自盐酸、硝酸、硫酸或乙酸中的至少一种酸溶液在温度20～90℃下处理1～8小时；然后在温度为400～700℃条件下水蒸汽处理2～15小时；再用0.1～3摩尔/升选自草酸、柠檬酸或马来酸中至少一种在温度为20～90℃条件下浸渍2～5小时得所需改性分子筛催化剂的技术方案较好地解决了该问题，可用于甲醇转化制丙烯的工业生产中。

Based on maximum likelihood estimate, the estimate method of sieving rate of connectivity sieve was presented. Three key issues in the estimate were analyzed:calculation of sample size,generation of random sample, and recognition of connectivity of induced subgraph. By preassigned credibility and precision, effective estimate of sieving rate of connectivity sieve is achieved.

目前，产品拆卸过程规划基本上是建立在图的基础上，即首先根据产品拆卸回收或拆卸维修信息，选用一种适合的图模型进行描述，然后在图模型的基础上，以拆卸回收或拆卸维修的经济性、环境协调性和技术性等综合指标最优为目标，进行拆卸过程规划，最终得到产品的最优拆卸序列【1一。1连通性筛子拆卸与或图是拆卸模型中的一种，文献[7]给出了拆卸与或图的定义及建模过程。

The practical problems in the granulometric analysis method—the water sedimentation analysis method and the dry sieve analysis method,are analyzed,and an improved water sieve analysis method is developed in this paper.

文章分析了目前粘性土颗粒分析的主要方法——静水沉降法和干筛法，指出其存在的问题。

The invention relates to an improved MCM-41 mesoporous molecular sieve and a preparation method thereof, in particular relates to a dual-metal-atom improved MCM-41 mesoporous molecular sieve and the preparation method thereof.

本发明涉及一种改性MCM-41介孔分子筛及其制备方法，特别是涉及一种双金属原子改性MCM-41介孔分子筛及其制备方法。

This is not an ordinary box, which is used as a background picture of the dialog box, very pretty.

详细说明：这可不是一个一般的对话框，它是用图片作为背景的对话框，非常好看。

Conceal me what I am,and be my aid for such disguise as haply shall become the form of my intent.

遮掩我的身份，帮助我，我的面具将成为我的目的。