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In theory, firstly, the numerical simulation methods, such as the boundary element method, the finite difference method and the finite element method, were utilized to calculate the distribution of electric field intensity and potential of the electron-gun system, the focusing system and the whole equipment, respectively. Then, the trajectories of the electron-beam were traced by using of the Runge-Kutta method and the Monte-Carlo method associatively. The point spread function was also calculated.

在理论分析中,先后采用边界元方法、差分方法、有限元方法等科学数值计算方法,编制程序,对X射线源的电子枪发射系统、聚焦系统以及发射系统与聚焦系统的组合系统等的电场分布进行了严格的计算,在准确求得各系统电场内各个剖分点的电场场强、偏导数等参量的基础上,采用蒙特-卡罗模拟方法和不等距龙格-库塔方法相结合,追踪由LaB_6单晶阴极表面发射出的大量电子束在电场内的运动轨迹,求出点扩展函数,并根据点扩展函数的优劣,反复调节、大量计算对比,挑选出X射线源最佳的电极结构及其组合。

This test studied some biological and bionomical characteristics of this pest, including life stages,developmental threshold and day-degree requirements,longevity,NO.

本文研究了西花蓟马的生活史、发育起点温度和有效积温、成虫寿命、产卵量和产卵规律、不同虫态的存活率、实验种群生命表、活动习性、危害特点、寄主选择性、种群动态等生物学和生态学特性,调查了西花蓟马在北京的分布、为害规律及嗜食特性等,并对色卡诱集技术、虫生真菌对该虫的致病性等一些防治技术进行了初步研究,主要结果如下。

Vertical zonation of plants, 700m here are pine, poplar, willow, pulling, etc. 8 kinds and a variety of economic trees. 1700m ~ 1000m between the growth of pine, birch, cypress, Lespedeza, etc., 1000m above with a small amount of Betula, Populus, weed, and six wood, Corylus, moss and so the distribution of irrigated grass, 1500m above the larch.

植物呈垂直分带,700m以下有油松、杨树、柳树、揪等8种及各种经济树种。1700m~1000m之间生长松、桦、柏、胡枝子等,1000m以上有少量桦、山杨、杂木林及六道木、毛榛、苔藓等灌草丛分布,1500m以上为落叶松。

Workflow Engine is the core part of Workflow Management, this paper takes E- FSM as the model, consults the standards of WfMC, divides the Engine into five functional modules, adopts Distribute Object Computing technique of EJB、JMS、JNDI, control mechanism of thread polls and queue, script interpreter technique of BeanShell, and gives the design and implementation solution of each module,make it have the more obvious advantage in the application performance,resource utiliaztion,scalability,supporting heterogenicity and distribution.

工作流引擎是工作流管理系统的核心部件,本文以扩展的有限状态机为模型,参考WfMC标准,对工作流引擎的功能划分成五个模块,并采用EJB、JMS、JNDI等J2EE分布式计算技术和线程池、队列调度机制以及BeanSehll脚本解释技术等,给出了各个模块的设计和实现方案,使其在应用性能、资源利用率、可靠性、支持异构和分布性等方面均有较明显的优势。关键词扩展的有限状态机 EJB JMS 工作流引擎,线程池队列

To inquire into association between susceptibility to AIDP, AMAN and frequencies of HLA alleles and possible differencies in distribution of HLA alleles betwen AIDP and AMAN by genomic typing for HLA-class Ⅰ, class Ⅱ alleles, and to try to found out the effects of self intrinsic fators of GBS patients on occurence of two subtype from immunogenetic angle.

通过对AIDP和AMAN两种GBS亚型的HLA-Ⅰ类和Ⅱ类等位基因的分型,探讨两种亚型的易感性与HLA等位基因分型的关系以及两种亚型在HLA等位基因分布上可能存在的差异,从免疫遗传学角度寻找自身内在因素在GBS不同亚型发病中的可能作用。

Based upon the ecoanatomical method, leaf anatomical characters of eleven populations of six evergreen species (Cyclobalanopsis glauca, C. myrsinaefolia, C. gracilis, Castanopsis sclerophylla, C. eyrei and Lithocarpus glaber) from the eastern subtropical area of China were analyzed and compared with SPSS, DCA and TWINSPAN. The results are: 1. Although the leaf structures of the eleven populations still belong to the mesophyll type, they all express the trend of xerophilization. 2. There are some differences in leaf anatomical characters among populations, species and genera, which occur as the results of their adaptation to different habitats. 3. Different leaf anatomical characters have different variations among populations, species and genera, of which leaf thickness and palisade tissue thickness (considered as ecological adaptation characters) have greater variation than sponge tissue thickness, lower cuticle thickness and lower epidermis thickness (as systematical evolution characters). 4. The leaves of C. sclerophylla and C. glauca with thicker lamina, palisade tissue and cuticle (a multilayered upper epidermis in C. sclerophylla) are thought to better adapt to their dry habitat. The leaves of C. eyrei with thicker sponge tissue, although characterized by a multlayered upper epidermis, adapt to their humid and warm habitat. The leaves of C. myrsinaefolia and C. gracilis characterized by a thinner lamina, a less palisade tissue and a moderate cuticle thickness adapt to the humid and cool habitat in a middle mountain.

选取亚热带东部替代分布明显的壳斗科6种常绿树种(青冈、小叶青冈、细叶青冈、苦槠、甜槠和石栎)的11个种群叶片进行生态解剖,并用SPSS, DCA和TWINSPAN比较分析,结果表明:①尽管6种11个种群叶的结构仍属中生叶型,但有着不同程度的趋旱适应;②叶的解剖性状在属间、种间和种群间均存在着不同程度的差异,这是它们适应各自生境的结果,青冈和石栎的种内差异较大,反映出它们对环境变化有较强响应能力;③叶片的不同解剖性状在属、种类和种群间的变化并不同步,其中叶片和栅栏组织厚度等性状差异突出,反映它们更易受环境的饰变,是生态适应性状,而海绵组织、下角质膜,特别是下表皮厚度等性状差异较小,显示出这些性状的稳定性,可以认为是系统演化性状;④苦槠、青冈具有较厚的叶片、栅栏组织、角质膜和发达输导和机械组织,苦槠还具有复表皮,表现出对旱化生境的适应;甜槠尽管具有复表皮和较厚的叶片,但这是海绵组织增厚的结果,是对中生生境的适应;小叶青冈和细叶青冈具有较薄的叶片和栅栏组织、角质膜厚度居中等特点,可能是对中山凉湿生境的适应。

Based on lots of achievements of predecessors, directed by reservoir sedimentology, high-resolution sequence stratigraphy and petroleum geology, taking full advantage of loggin, core and thin section data from different wells, this paper has taken detailed study on the Upper Paleozoic strata in Tabamiao area.

本论文在众多前人研究成果的基础上,以储层沉积学,及高分辨率层序地层学、石油地质学等理论为指导,充分利用测井、钻井岩芯、薄片鉴定等资料,针对塔巴庙地区上古生界沉积相及沉积微相类型与展布,高分辨率层序地层特征与层序—岩相古地理演化,成岩作用类型与序列,孔隙类型与特征,以及储层物性特征与分布规律等方面展开了系统深入研究,最后对有利区带进行了预测。

Analysis of the dynamic process of core degradation, debris relocation within the reactor vessel, molten pool formation, reactor vessel melt-through and corium relocation into the core catcher is executed with the computer codes SCDAP/RELAP and MELCOR, and the reaction among the corium, the sacrificial material, and the metal material, as well as the thermal and hydraulic characteristic of heat exchanger is experimentally studied.

在田湾核电站堆芯捕集器的设计中,综合采用了压力容器外包容装置、非能动供水冷却堆芯熔融物包容体金属表面以及用&牺牲性&材料改善熔融物特性和降低热流密度等项技术;利用SCDAP/RELAP和MELCOR两个独立的程序包分析了压力容器内堆芯的损坏、碎片的分布、熔池的形成、压力容器熔穿和熔融物转移到堆芯捕集器等的动态过程,并对堆芯熔融物、&牺牲性&材料、金属材料等之间的物理、化学反应和热交换器的热工水力特性进行了实验研究。

To investigate the factors influencing the college labor union's spor ts activity, the research adopts the methods of literature review and question naire in this article. The results reveal the single organizational and manage ment system, less management in Basic level unions (department, faculty sports a ssociations), inadequate knowledge of leaders on organization and management, an d research capability, less sources of funding and unreasonable disbursement. I tis suggested that higher education institutes should reform sports organizationand management system to promote sports activities.

小 摘要:运用文献资料、调查等方法,对影响高校开展教职工体育活动的组织管理等因素进行研究,结果表明:高校教职工体育活动的开展组织管理手段单一;基层(部门、教职工体育社团)工会的体育管理的制度比较少;组织管理者指导、组织管理和科研能力欠缺;经费来源途径少,支出分布不合理等,建议普通高校对开展教职工体育活动组织管理体制进行改革,以此推动普通高校教职工体育活动的开展。

The susceptance of the capacitor and the ration of the OLTC are regarded as control variables in the reactive power optimization to overcome the disadvantages in application of equal wastage ration method in distribution network.

传统的无功优化技术是以等网损微增率方法为基础的[1],其主要优点是简单、有效,但对于配网来说,却存在两个主要缺陷:由于配网总的无功最优补偿容量无法确定,所以等网损微增率方法无法得到一个较优的补偿方案;在配网的实际运行中,当电压偏差较大时,有载调压变压器往往作为凋节电压的手段而对无功功率的分布产生影响,使得等网损微增率方法难以实现。

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And if officials on the take are not parroting the opinions of these companies, what can we suppose the money they receive is for?

如果受贿的官员不鹦鹉学舌般地复述这些公司的看法,那他们所接受的钱又能用于什么目的呢?

Love them, and love you too, Pitcher.

爱他们,也爱你,投手。

He was sent away to the island of Scyros,where he fell into sea from a cliff.

赶下了台。他被流放到塞库鲁斯岛。在那儿,他失足从悬崖上栽到了海里。