方法研究

The paper introduces some researches, such as a new method to calculate the added mass for the seismic analysis of the fuel assembly in fast breeder reactor, simulation on the vortex shedding of double heat exchange tubes in a steam generator, simulation on the vortex shedding caused by the cross -flow over plates in a fuel assembly of an advanced reactor, the research on the impacting phenomenon of the free-surface on the vessel head in a storage tank as the main vessel of the China Experimental Fast Reactor shaken by the earthquake, and the researches on the solution of the liquid sloshing by moving particle semi-implicit and the scattering phenomenon caused by sloshing, and so on.

本文介绍华北电力大学在该方面的一些研究进展，例如，快堆燃料组件抗震分析新的流体附加质量计算方法研究；蒸汽发生器换热管双管漩涡脱落的数值模拟；一个先进堆燃料组件平行板上流动引起的漩涡脱落数值模拟；由地震引起的自由表面对快堆主容器冲击现象的研究；移动粒子法求解液面晃动及晃动引起离散现象的研究等。

Then steady forced vibration of the nonlinear Disk spring-mass system under base excitation and force excitation is obtained individually by using the Fourier series analysis and harmonic balance method.

详细探讨了考虑静力载荷影响的、具有弹性非线性和Coulomb摩擦阻尼非线性的碟簧元件的建模和动力学特性，首先利用Fourier级数分析技巧和平均法研究了非线性碟簧-质量系统的自由振动，讨论了影响自由振动的振幅和频率的各种因素，然后利用Fourier级数分析技巧和谐波平衡法研究了地基激励和力激励下非线性碟簧-质量系统的强迫振动，通过详细的参数研究考察了非线性碟簧元件的减振性能特征，最后采用修正的稳定性分析方法研究了两种激励下稳态响应的稳定性。

Based on the spaceflight technology innovation program of"Research on the Testing Method of Reliability----Research on the Fault Diagnostic Expert System and Neural Network"and the Pre-Research Defense Projects of"Research on longevous service and high reliability of Satellites"of the National tenth-five-year plan, taking attitude control system of a satellite as object, the theories and the applications of the neural networks and expert system in the fault diagnosis are studied in this dissertation.

本文以航天技术创新基金项目&可靠性试验方法研究——故障诊断的专家系统神经网络技术研究&和国家武器装备&十五&预研项目&卫星长寿命高可靠性技术&为背景，以卫星姿态控制系统为研究对象，在理论和实践两个方面对神经网络和专家系统相结合的故障诊断技术及其在卫星中的应用进行了研究。

This paper deals with systematic species investigation and quality evaluation of Rosa rugosa in Shandong- province.

本课题对山东玫瑰花进行了系统的品种调查整理和质量评价研究，从本草学考证、栽培及加工方法研究、植物学研究、药材鉴别、含量测定、挥发油成分GC-MS分析等六个方面对其进行了全面考察、研究分析。

Sociometric nomination, sociometric rating and questionnaire method were applied in this survey.

本研究采用同伴提名法、同伴评定法、使用&班级戏剧&和&友谊质量&问卷分别在2002年6月和2003年6月对武汉市一所小学3、4、5、6年级儿童进行追踪调查，采用横断研究和纵向研究相结合的方法研究儿童的外部攻击行为、关系攻击行为对同伴关系的影响。

The research significance, The research direction and the style of mathematics branch of discipline thinking method are given.

摘要给出了数学分支学科思想方法的界定，探讨了开展数学分支学科思想方法研究的意义、研究方向和体例。

To demonstrate its feasibility, MD-SPME was compared to the conventional method, steam distillation.

本论文用该方法研究了益智和鱼腥草两种天然植物精油，优化了微波辅助-固相微萃取的萃取参数如萃取头选择、微波功率、微波照射萃取时间和解析时间，研究结果与水蒸气蒸馏方法基本一致。

Themultiple correlated coefficient of mathematical model was 0.951,which showed that the experimental designmethod is feasible in study self-thinning of forest.

尝试将二次正交旋转组合设计方法应用于杉木林自疏规律研究，建立重要环境因子与密度变化间的统计模型，并进行统计分析，表明采用试验设计方法研究森林自疏是适用的，其复相关系数为0.951。

Then we have analyzed the reasons of mechanism by using the rural public income model of the central government' s control and local governments' self-benefit behavior.

运用完全信息动态博弈模型化方法研究县级财政与乡镇财政收入划分的博弈关系，运用中央管制——地方自利模型化方法研究任务型收入机制''的成因。

The study of lattice-valued resolution principle based on lattice-valued logic with truth-value in lattice implication algebras Because of it concise, resolution principle is an implication direction in automated theorem proving, and it will be of significance to establish resolution principle based on non-classical logics.

基于格蕴涵代数的格值逻辑中归结推理的理论与方法研究归结原理由于其简洁性一直是自动定理证明中一个受到广泛重视的研究领域，因而建立基于非经典逻辑的归结方法对于非经典自动定理证明有着重要的意义。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。