查询词典 field capacity

Our products refers to the field of energy electric power, lighting appliance, communication, millitary affairs, navigation, aviation, traffic security, farming irrigate, capacity control, hydrometeor.

产品涉及能源电力、照明电器、通讯、军事、航海航天、交通安全、农牧灌溉、智能控制、水文气象等诸多领域。

In Xing shu gang oil-field, low permeability, weak physical characteristic, high content of clay cause serious formation damage. On research of the study of low permeability formation and damage characteristic of Xing shu gang oilfield, we acquire why the injection wells have problems of little hygroscope thickness and low hygroscope capacity.

本文针对杏树岗油田薄差层渗透率低、物性差、粘土含量高、吸水能力较差的问题，通过对杏树岗油田薄差层储层敏感性评价和储层伤害机理的研究，详细分析了造成该油田注水井吸水能力较差的原因。

ABSTRACT Aiming at problems of trans-vector controller in a vehicle-carried induction motor such as variable rotor and stator resistance following motor temperature, and their inductance varying with flux saturation degrees. Firstly, CSI and VSI are introduced, for CSI, it can hold the advantages both FOC and DTC using stator flux directional, PI parameter and simulation are also introduced. Secondly, equations of IM in the synchronous rotary frame and its static counterpart, as figuring in the saturation condition of magnetic field, are dealt in this paper and the simulation results are presented. Thereafter, the parameter designing of PI trans-vector controller is processed, which features the non-linear model. In practical realization, as neglecting the dynamical change of motor inductance, this paper employs online modification of inductance parameters, according to the flux saturation, then transforms the non-linear equations into linear ones, and so compacts the structure of controller. Thirdly, in view of the maximum torque output is extraordinary requisite when Electrical Vehicle start up, accelerate, and overtake, this paper issues the maximum torque when both inverter and battery capacity is corporeally definite. Fourthly, on-line differentiating and analyzing both rotor's time constants and its flux by using the expanding order reduction and discrete Kalman filter equation are fathomed, in order to realize high-performance trans-vector algorithm, and also the simulation results are presented. Fifthly, the close-loop regenerative brake system, when the EV's torque is set constant, is deduced; at the same time, unification of electric drive model and brake model is executed. Combined with maximum charge current demands, the mathematical model for online yielding torque as a demand.

本论文针对车载异步电机在矢量控制器所遇到的问题：定转子电阻随温度变化及随电机饱和程度变化的转子电感及定子电感而影响电机调速性能提出一套完整的解决方案：分析了电流型逆变器和电压型逆变器在实现矢量控制时控制器参数的计算，分析出对于电流型逆变器在采用定子磁场定向时，其性能同时具有矢量控制和直接转矩控制两者的优势，并对电压型逆变器在转子磁场定向下的模型进行了仿真研究；建立异步电机非线性模型，推导出考虑磁饱和时异步电机在同步旋转坐标系及静止坐标系下的方程，并做出了仿真结果，建立异步电机在非线性模型下的矢量控制调节器的PI参数设计，在实际应用中，若忽略电机电感的动态变化，可以根据当前的磁路饱和状态而在线修正电感参数，从而将非线性方程线性化，降低控制器的复杂度；考虑到电动汽车在起动和加速超车时需要电机有最大转矩输出，本文讨论在逆变器容量一定和电池供电能力有限的情况下电机最大转矩输出问题；推导了异步电机扩展降阶、离散卡尔曼滤波方程在线辨识转子时间常数和转子磁通，用于实现高性能的矢量控制算法，并给出了仿真结果；推导出了电动汽车恒转矩给定的闭环回馈制动系统，实现了电动控制模型和制动模型的统一，而且结合铅酸电池最大充电电流的要求，为制动转矩在线给定建立了数学模型；设计了基于双DSP系统的高性能矢量控制器软硬件框图，并以大量实验数据说明矢量控制在电动汽车应用的实际应用状况。

In the field of multi-machine communication, MCU have a flexibleand efficient multi-machine communication function, so itsapplication is more and more extensive. But, because the SCM signalare TTL level, the limited capacity of driver and anti-jamming, inPractical application, used with other bus.RS485 bus is one ofthem.

在多机通信领域，由于单片机具有灵活高效的多机通信功能和价格优势，应用越来越广泛，但由于单片机的收发信号都是TTL电平，驱动能力和抗干扰性有限，实用中常配合其它总线实现互联，RS485总线就是其中之一。

However, in 1962, the Israeli legislature, called the Knesset, enacted a totally new law to cover the fundamental field of legal capacity and guardianship.

然而，在1962年，以色列议会，要求议会，颁布了一项新法律，完全覆盖领域的基本法律行为能力和监护。

In recent years, science and technology of high speed and large capacity magnetic information store has been in the fastest development of solid-state electronics field and the information store capability increases twice per sixmonth .

高速、大容量磁信息存储科学与技术是近几年来固体电子学领域发展最快的领域之一。从信息存储容量来说大约每六个月增加一倍。

ABSTRACT In recent years, science and technology of high speed and large capacity magnetic information store has been in the fastest development of solid-state electronics field and the information store capability increases twice per sixmonth.

高速、大容量磁信息存储科学与技术是近几年来固体电子学领域发展最快的领域之一。从信息存储容量来说大约每六个月增加一倍。

We should strengthen the research on soil nitrogen cycle in protected field, especially in transformation of nitrogen forms and soil nitrogen supply capacity which was an important research direction of nitrogen nutrient in the future.

今后应在加强保护地土壤氮素循环研究的基础上，将氮的形态转化及土壤供氮能力研究作为保护地土壤氮素研究的一个重要方向。

With the development of Immunology, its theory and technique application in the field of Otology, it is known gradually that inner ear is not immuno- privileged organ, it has the capacity of immuno- response defence and regulation. In certain circum- stances, the tissue of inner ear may become an autoantigen, which stimulates immune response of inner ear, induces inner ear lesions, causes Autoimmune Inner Ear Disease . Investigation into the inner ear immunity has opened up a new way of studing uncertain inner ear diseases.

随着免疫学的发展，免疫学理论和技术在耳科领域日益广泛的应用，使人们逐步认识到，内耳并非免疫"豁免"器官，它具有免疫应答、免疫防御和免疫调节能力；在某些病理情况下，内耳组织可成为自身抗原，激发内耳免疫反应，导致内耳损害，引起自身免疫性内耳病，对内耳免疫学的探讨，已为不明原因的内耳病的研究开辟了新的途径。

Think on-the-job field does overmatch, be about to know the capacity that contemporary and first-class staff ought to have and disposition structure.

想在职场做强者，就要了解现代优秀员工应当具备的能力和性格结构。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。