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After take analyzed deeply for the opened magnet circuit with FEMM (Finite Element Method Magnetics) we find out the field distributing that is separated into three sections . One is the main area what we called as positive field section. Beside the main field there are tow areas that are called the inverted field sections. Loudspeaker arise a very serious distortion when the voice coil moving into inverted field areas. The direction of induced current in the coil part of entered inverted field area is same with the current driving into loudspeaker so that total currents increas largely and heat increase rapidly. With more coils moving into inverted area the voice coil will take on negative inductance properties. It is the main reason that voice coil is burned by heating with increasing current due to arise negative inductance. So opened magnetic circuit is not suitable for the woofers in which the voice coil have wider displacement range. When using this kind magnetic circuit design, the voice coil moving range should be less than the range of positive field to avoid loudspeaker arise serious distortion and heating. Even though voice coil moving range is in the positive area, loudspeaker will still arise more distortion because the field distribution is very cliffy at tow sides of the positive area and full range of magnetic field distribution is not parallel that will arise distortion. Base on above reasons, opened magnetic circuit is not an ideal magnetic circuit for low-frequency loudspeakers. But it can be used in mid-range or high-frequency productions.

开式磁路是由2片钕铁硼磁铁和主导磁板和导磁垫片组成，我们在实践过程中发现这种磁路结构不适合于低频扬声器的使用，我们通过使用FEMM（Finite Element Method Magnetics）软件包对该磁路进行了分析，该磁路的磁场范围被分成3个区域，其中在主导磁板附近形成一个正向磁场，在正向磁场的两边存在反向的磁场，音圈在工作时有很大一部分进入了反向磁场中，在反向磁场内线圈的感应电流方向与驱动电流方向相同，使得音圈呈现出负感抗特性，由于音圈的负感抗特性引起电流的增加导致音圈发热甚至烧毁，因此在扬声器中使用开式磁路时，音圈的运动范围应控制在正向磁场范围之内，否则音圈运动到反向磁场区域时将会产生很大的失真和发热，即使在设计时已经将音圈的运动范围控制在正向磁场范围之内，由于正向磁场的2个边缘磁场强度衰减太快，同时开式磁路中磁场的分布不是平行的，而是自由发散的分布，这样肯定会导致扬声器的非线性失真，因此我们得到的结论是：开式磁路并不是一个理想的磁路，它不适合于低频扬声器的使用，但它还可以应用于中高频扬声器。

This thesis also compared the competitory capacity of Ningbo port with Qingdao port, and analyzed the present situation of crude oil transfer of Ningbo Port Group, then take the process of "swot" to sammarized the advantage and disadvantage of the Groups crude oil transfer. According to the analysis of competitor-Qingdao port, this thesis proposes that Ningbo port should make a clear blueprint confirming its aims, selection and location of the market, and the Port should take different operational strategies of either cooperation or competition with different competitors accordingly, so as to accomplish and solidify its position of the biggest crude oil transfer harbor nationally and also an important base for product oil transfer in eastern part of China.

还对宁波港和青岛等港的原油中转竞争力进行了比较分析，分析了宁波港集团原油中转的现状，然后通过SWOT方法归纳总结了宁波港中转原油的优势与不足，根据竞争对手情况和宁波港自身的分析，有针对性地确定宁波港集团拓展原油中转业务的目标、市场选择和市场定位，并针对不同的竞争对手，采取合作、竞争不同的经营战略并实施，最终实现巩固宁波港全国最大原油中转基地和华东地区重要成品油中转基地之目标。

The company now owns advanced equipment, lathes category has CNC, take pains, and take the knife machine, lathe, such as Longitudinal section of the table-type lathe; processing models have precision milling machine, coreless grinder, tapping, drilling, polishing and so on.

公司现已拥有先进的设备，车床类有CNC、走心机、走刀机、桌上车床等纵切式车床；加工机型有精密铣床、无芯磨床、攻牙、钻孔、抛光等设备。

On the base of applied tech. and system structure, the key tech. are expressed in detail. It includes:Knowledge representation technology: it is described in two stages by "Depictive frame + Rule group"."Depictive frame" is used to reflect the factors concerning question field."Rule group" reflects the son-question in question field; knowledge management system: it is made up of knowledge-base editing component, factor classifying component, knowledge inspecting component and extractive knowledge component; uncertainty reasoning adopt method of elicitation search strategy and data drive controlled by member knowledge. It take reliability of compound proof at first. That can resolve the matching contradiction. Reasoning explanation introduce pre-text and followed method of resolving path. Knowledge discovery component take SLIQ as basic arithmetic. It provides classification model in two stage forms which aim at training suit. That is decision tree and productive rule.

在确定应用技术与系统结构的基础上，重点阐述了本文的核心技术，这包括：知识表示技术，采用&描述框架+规则组&的层次结构，&描述框架&用于描述问题域所涉及的因素，&规则组&反映问题域内的子问题；知识管理系统，由知识库编辑构件、因素分类构件、知识检测构件和知识求精构件组成；不确定性推理机采用启发式搜索策略，元知识控制的数据驱动，以复合证据可信度优先作为匹配冲突消解的策略，推理解释采用预置文本与求解路径追踪的方法；知识发现，采用SLIQ快速可伸缩算法，分类模型用判定树与产生式规则两种形式描述。

At present, Our main products are fish, shrimp, crab, shellfish four main categories, a total of more than 30 varieties; products are freeze-led South American carinicauda series products, such as shrimp to take the lead in to the first shrimp, butterfly shrimp, Fissidens shrimp, shrimp; frozen shellfish products, where mussels, shellfish, clams string, semi-shell clams, whole clam meat; frozen tilapia products, such as the original article tilapia, second to tilapia , Tilapia Fillet; frozen squid products, such as the original article squid, squid torso, squid ring, squid slice; frozen cut crab block, frozen fillets, such as horse face.

目前，公司主要产品有鱼、虾、蟹、贝四大类，共30多个品种；主导产品有冻南美白虾系列产品，如带头虾、去头虾、蝴蝶虾、凤尾虾、虾仁；冻贝类系列产品，如有青口贝、文蛤串、半壳文蛤、全肉文蛤；冻罗非鱼系列产品，如原条罗非鱼、二去罗非鱼、罗非鱼片；冻鱿鱼系列产品，如原条鱿鱼，鱿鱼胴，鱿鱼圈，鱿鱼片；冻切蟹块，冻马面鱼片等。

To obtain precise result, itis necessary, in the aspect of hardware, to set up one stable optics system with highSNR, only if so, can we do the measurement with the steady NIR. To do so, we designthe optics system using AOTF, and take some measures to increase the light energyand the system SNR, which includes the three layers structure of the light chamber,the equipments to cover the useless light, polarizing to reduce the influence of 0 gradelight and focalize the light with lens. Apart from the hardware aspect, according to theexperiments, we can see that the different temperatures between at setting up themodels and at predicting the results will affect the prediction results in a way, and theaffection extent will be increased along with the increase of the temperaturedifference. Moreover, the light energy that can be detected will be different with thecontact pressure, and the match of the refractive indexes between the tissue and thesurroundings will enhance the light transmission depth, which will take moreinformation of the tissue. So, during the measurement, we should ensure the sametemperature between measuring and predicting, the same contact pressure at everymeasurement and the match of the indexes between the tissue and the surroundings aspossible as we can.

要提高测量精度，从硬件方面就必须有一个稳定的、信噪比较高的分光光路系统，以此得到稳定的近红外光来进行无创检测，针对这个目的，我们设计了 AOTF 分光光路系统，并在系统中采用一定的措施如三层灯室结构、遮光筒以减小杂散光、起偏和检偏来减小 0 级光影响、透镜汇聚等等来提高出射光的能量和系统的信噪比；从其他影响因素方面，通过实验，我们得到不同的建模温度对于预测结果有一定的影响，且影响随着温度的差值越大而越大，另外散反射光谱的能量也随着接触压力的不同而不同，组织的折射率与环境匹配将加大光的入射深度，从而能携带更多的组织信息，所以在测量时我们尽可能保证同一温度、保证同一接触压力以及利用物理或者化学的方法使组织与环境折射率匹配等。

This paper presents in more detail on the design process of the liner and piston group of Model CY6110 diesel engine,it has given certain analysis and study on the design,calculation,material,it also presents in more detail on various kinds of data of this group of frication pairs,such as structure design,material selection,pcocess machining,testing certification etc,as well as the further prospets for such research work so that the related people can take it as reference.

本文较为详尽地介绍了CY6110型柴油机的缸套、活塞组的设计过程，对发动机的缸套、活塞、活塞环这组摩擦副的设计、计算、材料、工艺、检测等方面做了一定的分析和研究；同时，也较详细地了介绍这组摩擦副在结构设计、材料选配、工艺加工、试验认证等方面的各项数据，以及此项研究工作的进一步展望，以供有关人员参考。

In recent years , land economic county have, private economy refer to into high position very, private economy take place tough place as Fujian, Fujian Jinjiang take one county land unique road of economic development, economy is developed at a high speed year after year, the basic competitiveness of national county land economy in 2003 ranks the fifth while appraising , has already become the national one hundred prosperous counties for several years in succession, its hypernormal development model has received the great concern.

近几年来，县域经济、民营经济被提到了很高的位置上，作为福建民营经济的发轫之地，福建晋江走出了一条县域经济发展的独特道路，经济连年高速发展，在2003 年的全国县域经济基本竞争力评价中排在第五位，已经连续几年成为全国百强县，其超常规发展模式受到了极大的关注。

At the same time, another focus of this thesis is to explore the Sui Dynasty literary feature like using simplified language without too much modification as the general principle, and to take etiquette music as ideological core of orthodoxical Confucian view on literature and literary works, as well as how to generate and how to assess the whole process.

在牛弘身边，聚集了一大批南北士人共同参与制定国家统一后必要的文化制度，反映出这一时代最深刻的本质；作为典型的儒家知识分子，牛弘的政治理想和其文学创作是相辅相成的，政治上，他积极参与一些根本性的制度建设，文学观念上，尊崇儒家经典文本的权威性，因而其作品显而易见的价值取向就是这一思路的延伸和外化。

Take this as the chance, the path that put forward your moderate is to strengthen the cultural approbation feeling, the perfect and decided autonomy system and related household register, the farmer lands hold the power etc. the kit system, create an argument of sex to have the modern reasonableness characteristic of autonomy system want the development in country economy, health, must be radicate in the country to practice, draw to take the agrestic factor in with mutual compromise of agrestic culture, whet match, struggle, then can develop have the mud breathing of the country" citizenry society" and" harmonious society".

以此为契机，提出两者协调的途径是加强文化认同感，完善既定自治制度和相关户籍、农民土地持有权等配套制度，创造性地论证具有现代理性特质的自治制度要在乡村经济、健康的发展，必须扎根于乡村实践，在与乡土文化互相妥协、磨合、斗争中汲取乡土因素，才能培养出具有泥土气息的乡村&市民社会&和&和谐社会&。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。