查询词典 shortage

In this paper, the basic principle and the power factor of conventional SERDS are discussed. Aiming at its shortage of low power factor, boost chopper type SERDS is adopted. The equivalent circuit of the new scheme is built up, and then vector diagram is used to analyze the power factor of the system, also the harmonic distortion of the system is discussed. The experiment device is established base on a 380F/7.5 kW induction motor and a passive soft switching scheme is applied in order to improve the working condition of IGBT. At last, the experimental results are shown.

本文在分析传统串级调速原理的基础上，对系统的功率因数进行分析；针对传统串级调速系统功率因数低的缺点，采用升压斩波式串级调速系统加以改进；建立了升压斩波式串级调速系统的等效电路并采用向量图法对该系统的功率因数进行详细分析；分析了系统的谐波情况；构建了以7.5kW／380V电机为调速对象的升压斩波式串级调速系统实验装置，给出相应的实验结果；针对斩波器中IGBT处于硬开关状态的缺点，应用无源无损软开关技术予以改善，包括对软开关电路工作原理的分析、参数的设计并给出相应的实验结果。

This method compensates the shortage that Venturi flow meter can only be used in the case of light-phase conveying and provides a new ideal and method for measuring on line the instantaneous mass flowrate of dense gas/solid two-phase flow.

该方法弥补了文丘里流量计只能用于稀相气力输送情况的不足，同时也避免了目前速度测量精度不高的缺点，为浓相气/固两相流瞬时质量流量的在线测量提供了一条新的思路和方法。

The invention changes traditional concept of medicament application and operational technique, overcomes shortage of sterilizing shearing tools in current leaf shearing and realizes sterilizing in real time during leaf shearing process and virosis spread controlling, and is characterized by easy operation and distinctive control effect and can be widely used in crop seedling course such as tobacco.

本发明改变传统施药理念和操作技术，克服了当前植物剪叶过程中采用剪叶工具间歇消毒的弊端，能够实现剪叶过程中实时在线消毒，控制病毒病的传播，操作简单，防效显著，可广泛应用于烟草等作物育苗过程中控制剪叶传播病毒病。

In the aspect of virtual unexpected events, focus on the shortage of existing flame model, paper proposes a random Lagrangian method based on non-grid, which through a group of particles to modeling the fluid. Its statistical properties and the equation based on fluid changes in the same particles, but more stable.

5针对虚拟火灾突发事件，鉴于现有火焰模型的不足，论文提出了通过一组粒子建立流体模型，它们的统计特性和基于流体方程变化的粒子相同，且在数值上比方程的确定性解更加稳定。

Not only solved the problem of shortage of enterprise funds, but also to maximize the visual image of the enterprise.

既解决了企业资金短缺的问题，又最大化了企业的视觉形象。

This research aims to develop a low-cost system which also could meet the requirements of the voiceprint recognition, in order to adapt to the situation of shortage of funds in more and more medium-sized forensic institutions.

为了适应广大中小型鉴定机构资金不足的情况，本文致力于开发出低成本又能满足鉴定要求的声纹识别系统。

However, if only considered as a "real Wadi shop", then it is absolutely shortage.

但是，如果只视为"真正的Wadi店"，那么它是绝对短缺的问题。

Water shortage is a global problem, and for water wastage and pollution, rather serious.

水资源短缺是一个全球性问题，而对水的浪费和污染却很严重。

We must be reminded that the energy, land, water, and material resources in China are in serious shortage, yet are used wastefully and carelessly, leading to increasingly severe environmental pollution.

但是我们不得不正视我国能源、土地、水、材料等资源严重短缺而实际利用效率低，环境污染严重且仍在不断加剧的事实。

Water industry is accelerated, modern water industry and sustainable development of water resources will be finally realized. To the status of China rapid economy development, serious shortage of water resources, and great gap between water supply and demand, new thoughts and approaches are studied in this paper to resolve the problems under the condition of socialistic market economy.

本文针对我国经济发展迅速，水资源严重短缺，供需矛盾异常突出的现状，在学习国内外研究成果的基础上，探索和研究在市场经济条件下解决我国水资源问题的新思路、新途径。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。