查询词典 spherical bessel function

Result indicates spherical catadioptric panorama imaging system can better realize panorama observation ,and comparing with other kinds of catadioptric facial ,spherical catadiop2tric panorama imaging system has advantages such as small scene distortion ,low2cost and simple design ,etc.

结果表明：基于球面的折反射全景成像系统可较好地实现全景观测，同其他几种折反射面相比，具有场景畸变小、造价低、设计制作简单等优点。

The results show that, by the way of optimizing preparation condition, the spherical zirconia powders with suitable particle size distribution are prepared using chemical precipitation method. Using heterogeneous chemical precipitation coating technique, the sph, erical nickel coated zirconia powders are prepared and the heterogeneous nucleation can be done on the surface of spherical zirconia powders. The thickness of coated layer, homogeneous degree and crack of surface can be controlled by the way of controlling powder concentration, adding rate of reactants feeding and adding surface active agent.

研究表明，采用化学沉淀法，通过优化制备工艺条件，可以制备粒径分布较均匀的球形氧化锆粉体；利用非均相化学沉淀包裹技术制备的金属镍包裹氧化锆微球粉体，球形氧化锆颗粒表面作为异相成核的场所，通过控制颗粒浓度、加料速度以及添加表面活性剂等工艺条件，可以调控包裹层厚度、表面均匀度以及表面裂纹等。

A gene sequence of the anthropogenic adiponectin spherical fragment obtained by the invention absolutely accords with a known gene sequence, and compared with the full-length adiponectin, the hydrolyzed anthropogenic adiponectin spherical fragment has stronger biological activity, fast reaction after dosage, good bioavailability and better clinic application prospect, especially when the diabetes patient receives a recanalization treatment after a myocardial infarction, the anemically myocardial damage of the diabetes patients can be eased by the exogenetic dosage.

本发明公开了一种人源性脂联素球状片段用于治疗糖尿病缺血性心脏病药物的应用，本发明所得到的脂联素球状片段的基因序列与已知的基因序列完全相符，与全长的脂联素相比，其水解以后的脂联素球状片段有着更强的生物学活性，而且给药后反应迅速，生物利用度好，有着更好的临床应用前景，特别是对糖尿病患者在发生心肌梗死后接受血管再通治疗时，通过外源性给药，以减轻糖尿病患者缺血心肌损伤。

In this paper, the research object is the XM18 spherical generator, in order to improve the dynamic behavior of the machine tool, the following aspects have been studied in this thesis: Firstly, based on the elasticity theory and finite element analysis theory, the finite element models of the lathe bed, dovetail, dovetail shelf, headstock, fanlike plank and millhead shelf, which were the main parts of the spherical generator, were built up using ANSYS9.0. And based on the modal analysis theory and FEM technology, the free modal and the constrained modal analysis of the main parts were studied. Accordance to the analytical results, put forword methods to optimize the key parts.

本课题以XM18球面铣磨机为研究对象，为了提高其动态特性，本文主要从以下几个方面进行研究：首先，根据弹性力学理论和有限元分析的基本理论，利用ANSYS9.0软件建立了铣磨机的主要零部件床身、燕尾、燕尾座、主轴箱、扇形板和磨头座的有限元模型，利用有限元法对主要零部件进行了自由模态和约束模态分析，并根据分析结果对关键部件提出了改进方案。

Based on a spherical shell structure and the graded finite potential well model, shifts of bound states caused by the interface effects on the binding energy level of hydrogenic impurities in a weakly-confined spherical semiconductor quantum dot heterostructures are studied.

采用球壳结构和渐变有限深谐振子势阱模型，利用镜像电荷的方法分析了不同介电常数下，界面效应对半导体量子点异质结中类氢杂质电子束缚能级的扰动情况。

Some picture simulating results in typical machining processes are obtained through computer simulation on machining machine parts such as spherical parts, spherical parts with certain errors and nonspherical parts.

提出了利用计算机仿真技术模拟研究回转式电火花加工过程的课题，并以回转电极展成球面加工过程为仿真对象进行图形仿真研究。

A kind of spherical microporous silica was synthesized by precipitation with the tetraethyl orthosilicate as a silica precursor and the block ploymer P_(123 as a template. The characterizations by the BET, FSEM and XRD showed that the spherical microporous silica has diameter of 3～4 μm, amorphous pore size of 0.9～1 nm and the specific area of 216±

以正硅酸乙酯作硅源，嵌段共聚物为模板剂，采用沉淀法合成均匀的实心球形二氧化硅微孔材料，BET、FSEM和XRD等表面分析手段表征表明，我们合成的二氧化硅微孔材料具有3～4μm的粒径和不规则分布的0.9～1nm的孔径以及216±3.5m2/g的比表面积。

The results showed that spherical BaCO3 particles with low reaggregation and uniform size of about 100nm could be prepared by using solid-state reaction of Ba(NO3)2 and Na2CO3 at room temperature; while stick shape particles, whose size is not uniform, were obtained for the BaCl2 2H2O and Na2CO3 system. For the Ba(NO3)2 and NH4HCO3 system, the products are spherical whose average size is about 200nm.

利用Ba(NO_3)_2与Na_2CO_3固相反应体系，可以制备出平均粒径约为100nm，形貌近似为球形的纳米BaCO_3；由BaCl_2·2H_2O与Na_2CO_3体系所得产物主要为棒状BaCO_3，且大小不一；由Ba(NO_3)_2与NH_4HCO_3体系可以制备出平均粒径约为200nm、形貌近似为球形的BaCO_3粒子。

In those cases, the plane waves have been transformed into cylindrical waves or spherical waves separately, and compute the reflecting factor of each spherical wave or cylindrical wave. When the plasma is unhomogeneous, the plasma slab can be divided into many sub-slabs and the solution can be found by using boundary conditions.

处理时将平面波展开成柱面波和球面波，分别求各个谐波的反射系数；对于非均匀介质，采用分层的方法进行处理，并在分界面匹配边界条件，得到较严格的结果。

The mathematics description of the non-spherical lens is the most important problem for the beam shaping system design. A numerical simulating method and its precision analysis are given, and the results indicate that this method is simple, and can be used for the design of LD beam collimating system with non-spherical lens.

非球面柱透镜曲面的数学描述是人们目前关注较多的问题之一，作者使用数值拟合的方法，对其进行了数值拟合并给出了精度分析，结果表明：该方法简单、直观，能够完全满足特定精度的要求，从而可以方便地用于非球面柱透镜的分析和设计。

When this condition occurs, inbound replication with the source partner is stopped on the destination domain controller and event ID 2042 is logged in the Directory Services event log.

计算机密码学是研究计算机信息加密、解密及其变换的科学，是数学和计算机的交义学科，也是一门新兴的学科。

Instructions: click on the thumbnails to see a larger image, then use the left-right arrow keys to scroll through the slideshow.

使用说明：滑鼠点在小图上即可放大观赏。开启后键盘左右键可用来换照片。