单中心的

The results show the existence of three major SSTA spatial patterns, which include the basin-scale single gyre pattern with the center in the northern area, the west-eastward antiphase dipole pattern, and the north-southward antiphase dipole pattern.

结果表明，南海南部海域海面温度异常场空间上主要表现为三种典型的分布结构，即以研究区域北部为中心的海盆尺度的单涡结构、东西反相的经向偶极子分布结构和南北反相的纬向偶极子分布结构，这三种分布结构都以2—4年的年际变化周期为主，反映了研究海域海面温度异常与ENSO现象高度相关。

Since the multiple scattering should be considered, the scattering problem of many-cylinders is more complicated than single cylinder. By using scattering matrix method to solve the scattering problem of many-cylinders, first we have to express the incident fieldand scattered field by special function（for example, Bessel function and Hankel function）under cylindrical coordinate, then use the addition theorem of special function to get a linear system of equations to relate the incident field coefficients and scattered field coefficients. The incident and scattered field coefficients for every cylinder can be solved from the linear equations by matching electromagnetic boundary condition pointwisely.

单颗圆柱散射体的散射场解析解很早就被解出，而多个圆柱阵列的散射场问题因为涉及到入射光在圆柱与圆柱间的多重散射，故散射行为较单颗圆柱的散射复杂，因此圆柱阵列的多重散射问题需要利用加法定理来处理；散射矩阵法的主要精神即是先用圆柱座标下的特殊函数对平面波和圆柱散射体的内外域电磁场做无穷级数展开，再藉由特殊函数的加法定理将所有圆柱散射体的展开中心移到同一个展开中心，最后可以得到一组连结整个散射系统的入射电磁场系数及散射电磁场系数的线性方程组，将该组线性方程配合电磁场在散射体边界的连续条件，便可分别求出圆柱阵列中各个圆柱体的内部电磁场与外部散射场，再利用线性叠加原理即可求得整个圆柱系统的全域电磁场分布。

By rational designs of mechanical structure and plan, the system uses PLC as the core of control on site, and accomplishes control of the installment and debug of the system step by step by software configuring design of the touch panel. Industrial computer, the centre of monitor, control and management of the system, composes epigyny and hypogyny machines' real-time monitoring and controlling system with PLC by designing the communicative model and program, and accomplishes man-machine dialogue in form of suppositional panel by designing supervisory software. Meanwhile, we also adopt client/server model and realize long-distance supervision of impact sensitivity experiment by program designing.

系统通过合理的机械结构和方案设计，采用PLC作为现场控制核心，通过对触摸屏软件组态设计，完成了系统现场安装、调试时的单步控制功能；作为系统的监控、调度中心的工控微机通过通讯模式和程序设计，与PLC组成上、下位机实时监控系统，间接地实现了对撞击感度试验的监控，并通过上位机实时监控管理软件的设计，以虚拟面板的形式较好地实现了人机对话；采用客户机／服务器模式，通过软件编程实现了撞击感度试验的远程监控功能。

Before 1970s, the supply model of government single-center was established and the research was focused on the location and efficiency according to public goods theory; During the l970s-1990s, the spatial equity of the distribution of public service facilities has been researched from theory of dual-main joint supply; From 1 990s to date, based on the theory of diversified purveyance, society differentiation and accessibility has been the research focus from the perspective of social restructuring.

结果表明：战后西方国家城市公共服务设施供给研究历经3个阶段：二战后至70年代，基于公共物品理论和社会公共服务的政府单中心供给模式，布局区位及影响机制是城市公共服务设施研究的重点；70-90年代，从公共服务的双主体联合供给理论出发，重在探讨城市公共服务设施供给的空间公平；90年代以来，在公共服务多元供给理论基础上，从社会结构的深层次视角研究公共服务设施供给的可达性差异及社会空间分异。

In section 2.2,we prove that if the set of arrows in a quiver is not empty,then NQ is not semisimple.We construct the nonsovable subalgebra of NQ when there is no less than one circle whose length is bigger than one ,and there is no loop in quiver Q,thus leads to a conclusion that NQ is nonsovable .

我们还对只有一个单循环和一个单循环及若干单箭头的箭图，给出了其项链李代数的某些中心元素的具体形式，在2.2节中，我们对非平凡图，即当箭图中有箭头时，利用H中的元素证明了N_Q不是半单纯李代数。

This study was part of a randomised, double blind single centre study, and a total of 248 sputum samples from 104 COPD patients were included. In total, 122 stable state sputa and 126 exacerbation sputa were tested.

此项研究属一项随机，双盲单中心研究的一部分，总计包含104例慢性阻塞性肺疾病患者的248份痰液样本，其中，122份为稳定患者的痰液样本，126份为急性加剧患者的痰液样本。

Methods and Results-: We enrolled 142 patients randomized at a single center to have either the radial artery or saphenous vein grafted to a stenosed branch of the native left circumflex coronary artery. The primary end point was angiographic graft patency 5 years postoperatively.

方法和结果：我们通过单中心随机试验对左冠状动脉狭窄进行桡动脉或隐静脉移植的142例病人进行研究，主要的终点利用血管造影对移植的血管进行监测5年。

1 Upon receipt of materials or items, Warehouse Keeper shall place them in the uninspected area of Warehouse as applicable, the Material Engineer shall check all the receiving documents such as Material Quality Certification, test reports and assure that all the documents described in the Purchase Order have been received then provide them to the QC Department for receiving Inspection.

3.1 材料到厂后，仓库管理员负责将其放到仓储中心的待检区内，材料工程师核对供应厂家的材料质量证明书，试验报告等文件，并保证材料采购单中所提到的文件齐全无误，提交给检验部进行验收检查。

Having solitary white flowers with yellow centers and blue- or pink-tinted exteriors.

北美的一种赤莲属植物，具有单生的以黄色为中心的白色花朵。

Is the national professional full-scale production of various high-quality yarn and finished products line, using domestic raw materials of yarn production of the famous single-wire, and imports of raw materials used single-wire the United States and Taiwan DuPont Nylon from the single-Sijia, Guangzhou is now the textile products through product quality supervision and inspection center testing, our product is non-AZO azo elements.

顺欣线业有限公司是国内专业全面生产各种高品质纱线和成品线，国产线纱原料采用国内知名企业生产的单丝；进口原料采用美国杜邦单丝和台湾耐隆单丝加工而成，产品现已通过广州纺织产品质量监督检测中心测试，我们的产品不含AZO偶氮元素。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐