Furthermore, around 50% of the world's population live in regions where the figure is now below the replacement level ( i.e.2.1 births per woman) and almost all developed nations are experiencing sub-replacement birth rate ．

Main Points of Using and Maintenance of ISUZU NHR Vehicle

五十铃NHR货车的使用与维护要点

Experimental Study of Mechanical Properties on Spacer in NHR

供热堆格架力学性能试验研究

Loading pattern optimization for NHR 200 MW using simulated annealing

利用模拟退火算法对200MW供热堆堆芯核设计的优化

Study on water level sensors in NHR 200 vessel

NHR-200堆内液位测量传感器研究

Flow induced heat transfer tube vibration on NHR 200 main heat exchanger

NHR-200主换热器传热管振动分析

NHR Dynamic Analysis of Control Rod and Fuel Assembly of Test Model

供热堆控制棒驱动线试验模型动力分析

Economic study of NHR application on high pour point oil field

用核供热堆开发高凝油田的经济评价

An Approach to Mechanism Type Selection Using LVQ Neural Network

采用学习向量量化神经网络法研究机构的选型

Assessment of traffic atmospheric environmental quality with LVQ neural network model

基于LVQ神经网络模型的道路交通大气环境质量评价

By comparison, LVQ network was better than the others in classification ability and training cost, and PNN network in computation load and easy use.

比较而言，学习矢量量化网络在分类能力和训练成本方面更胜一筹，而概率神经网络则在计算负载和易用性方面更好一些。

The results show that LVQ method outperforms these models and has good application prospect in this field.

研究结果表明学习矢量量化算法与这些传统方法相比具有更高的预测精度，在此领域有着良好的应用前景。

With its advanced technology in railway vehicle's air-conditioning systems and hydraulic pressure control systems, LVF is one supplier of the main air-conditioning systems for those big railway vehicle manufacturers such as siemens, Bombardier and alstom.

凭借其先进的轨道交通空调系统和液压系统技术，利勃海尔交通系统有限公司是庞巴迪，西门子，阿尔斯通等国际轨道车辆生产企业的主要空调系统供应商。

Method ERPs at 9 locations to LVF and RVF signals were compared in 23 normal subjects in 3 task conditions: looking forward only ( VC);

方法对23名被试者在3种任务条件下9个部位的与LVF和RVF相应的事件关联电位（ERPs）进行了比较。

Objective To study the response characteristics of left and right brain to signals from left ( LVF) and right ( RVF) visual fields during cognitive activity.

目的探讨在认知活动中左右脑对左右视场（LVF，RVF）信号的反应特性。

It is very important to determine left ventricular function ( LVF) in the diagnosis and treatment of heart diseases.

左室功能检查在心脏病诊治中极为重要。

The phenomena that the contents of S and N in naphtha hydrogenation treatment ( NHT) products exceed the standard are studied, and the influence of raw materials on the activity of catalyst is discussed.

对石脑油加氢处理产品硫、氮含量严重超标现象进行了研究，重点探讨了原料性质对催化剂活性的影响。

It is a key to GMRES ( m) method to choose the different m value to different equations of N-S equation in order to enlarge the application in CFD/ NHT;

N-S方程求解中不同方程不同m值的协调选取是GMRES（m）方法在CFD/NHT领域推广应用的关键；

Left ventricular remodelling, heart failure, postinfarction angina and death were obviously more frequent in HT group than those in NHT group ( P 0.05).

HT组发生左室重构，心力衰竭（心功能Ⅲ～Ⅳ级），心梗后心绞痛和死亡明显多于NHT组（P0.05）。

Finally, using NHT/ NST and atomic force microscope, the micro-tribological properties of enamel and the recovery of surface damage were preliminarily investigated.

本文采用纳米压痕/划痕仪和原子力显微镜研究了牙釉质的微观摩擦学性能，并对其损伤的修复过程进行了初步探讨。

The optimized design is performed through CFD/ NHT simulation for an avionics system adopting force convection air cooling, and also experiment is made to validate the simulation results.

针对采用强迫风冷散热的典型机载电子设备，利用CFD/NHT仿真进行优化设计，与热测试相结合进行验证。