诊断上

Methods Through questionnaires,the annual number of X-ray diagnostic examination of the whole province was investigated,according to it,hospitals were arranged decreasingly into four levels,and proceeded the stratified random sampling on the rations of

阳性率是判断X射线诊断检查应用是否符合合理应用原则的重要指标之一。X射线诊断检查的阳性率应保持在一个合理的水平上，如果阳性率过低，表明无临床意义的X射线诊断检查的应用过多，应当采取措施予以限制。

The paper studies fault diagnosis technology based on fruticose gas pipe network which is universal in small towns,and gives a particular description of domestic and foreign gas pipe network fault diagnosis technique based on hardware and software currently. The author uses graph theory to build up hydraulic analysis model of natural gas network and presents its solution methods. Besides, the author works out the relation between gas pipe pressure and flux in unsteady condition of fluid flow according to pressure boundary condition and differential equation group, and puts forward fault diagnosis methods and steps of the fruticose natural gas pipe network of middle pressure based on the simplification of this relation.

本文针对小城镇比较普遍的枝状天然气分配管网进行故障诊断技术研究，详细叙述了目前国内外基于硬件和软件的燃气管网故障诊断技术，利用图论理论建立了天然气管网水力分析模型并叙述了其求解方法，根据燃气管内流动的微分方程组和压力边界条件求解出非稳定流动时燃气管道压力和流量的关系，并在对此关系进行简化的基础上提出了基于中压枝状天然气管网的故障诊断方法和步骤。

Objective To explore the clinical pathological features,diagnosis and differential diagnosis of spindle cell myoepithelial carcinoma with lymph node squamous cell carcinoma metastasis.

目的探讨伴淋巴结鳞状细胞癌转移的梭形细胞肌上皮癌病理特征、诊断和鉴别诊断，提高对该肿瘤的诊断水平。

Objective: Presymptomatic gene diagnosis of autosomal dominant polycystic kidney disease families by PCR Methods: Genomic DNA were extracted Highly polymorphic microsatellite markers(SM7, AG2 5, KG8, CW2) linked to the PKD1were amplified using PCR Ten ADPKD families (104 members,including 28 affected) were analysed Results: Nine children were diagnosed with presymptomatic gene diagnosis ,although all children presented a negative ultrasonic diagnosis Conclusion: The presymptomatic gene diagnosis ...

目的：应用PCR方法对常染色体显性遗传性多囊肾病家系进行症前基因诊断。方法：用PCR扩增与PKD1位点连锁的的高度多态性的微小卫星体DNA（SM7，AC2.5，KG8，CW2）为遗传标记，对10个ADPKD家系的104个成员（包括28个患者）找出染色体上与疾病连锁的单体型，进行连锁分析。结果：对9个无临床症状，且B超检查呈阴性结果的儿童做出了症前基因诊断。结论：能够应用PCR方法对ADP－KD家系成员快速、准确地做出基因诊断

The principle of monitoring steel-cord conveyor belt joint breaking by Hall transducer and the mathematics model of measuring the belt joint elongation is discussed.

论述了用霍尔传感器通过测量接头拉伸量来进行钢绳芯输送带接头损伤和断裂状况监测的原理以及用于测量诊断的数学模型，并研制成功包括霍尔传感器与变送器、以及Z－80上开发的故障诊断软件在内的一套监测系统，该系统可用于皮带损坏、断裂信号的拾取、贮存、处理、诊断和预报等。

In order to adapt to the complicate structure and high difficulty in failure diagnosis of compactors, kernel hardware construction and system structure of an intelligent failure diagnosis system for compactors are suggested and on the basis of that, database subsystems in intelligent failure diagnosis system are mainly studied.

为了适应压路机结构复杂，诊断难度高的状况，介绍了压路机智能故障诊断系统的核心硬件结构和体系结构，并在此基础上着重研究了智能故障诊断系统的数据库子系统。

This article based on demand of production specially of that operator of production can master a little knowledge just to use it ,research theory of Artificial Intelligence , motor fault mechanism and fault forms Jooking for junction between Artificial and Motor Fault Diagnosis .

在此基础上，重点研究基于框架理论的专家系统在电机故障诊断中应用，及探索电机模糊诊断等，在人工智能在故障诊断作了一些探索，主要完成以下工作： 1。

By using rigid-body kinematics in connection with homogenous transform matrices, the generalized quasistastic error model of a machining system is put forward.

在此基础上，提出了基于覆盖集理论的加工质量诊断问题、诊断原理，并进行了加工误差源诊断实例研究。

MPR oblique images have a high sensitivity and specificity and require the least scan designators in diagnosis of LVA.

笔者用高分辨CT斜矢状位多平面重组图像对LVA进行研究，试图验证多平面重组斜矢状位上诊断LVA的可靠性，寻找一种诊断LVA的最佳方法，为VA扩大的诊断提供可靠依据。

At the same time, pattern recognition has been used for abstracting characteristics、predicting the life and evaluating the properties of engine. This research contributes toward global diagnosis for the diesel engine in eight ways.(1) Put forward"the Arithmetic of distinguish the period automatically using auto-correlation method";(2) Separate the waves of continuous knocks using WV distribution;(3) Propose"the logarithmic spectrum approximate method"to analysis the response of the knock between the steel and steel;(4) Discuss the relationship between the time-frequency distribution and timescale distribution in detail, and give the principle of classification;(5) Use the wavelet method to analysis the pressure signal of exhaust、suction;(6) Use the shape of vibration signal to analyse the working situation of cylinder;(7) Use the pattern recognition to select the good samples and abstract the effective characteristics;(8) Develop the model of total properties evaluation and life prediction.

本文在广泛的、深入研究的基础上，应用多种信号处理手段来分析处理数据，同时利用模式识别方法对故障的特征提取、寿命预测以及性能评价作了探讨，本文进行了以下几项工作：（1）提出了基于自相关自动周期识别算法的柴油机振动信号预处理策略；（2）提出了基于WVD分布的连续撞击响应信号的分离策略；（3）提出了基于对数谱拟合方法的钢—钢撞击响应求解模型；（4）提出了基于波形分析的非正常燃烧振动信号的诊断模型；（5）提出了基于小波细节信息的进气压力信号和曲轴箱压力信号的诊断模型；（6）提出了基于小波近似的喷油正时信号中燃烧位置的自动定位；（7）提出了基于统计模式识别方法的故障诊断知识的自学习与自组织策略；（8）提出了基于特征压缩思想的柴油机总体性能评价及寿命预测模型。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。