协变和逆变的区别对于张量的计算尤为重要，这往往会出现混合方差。
The distinction between covariance and contravariance is important for computations with tensors, which often have mixed variance.
最后就是对协变和逆变的支持了。
什么是拼缀法、缩略法和逆 生法？
就椭球头模型进行脑电正问题和逆问题进行推演。
To the ellipsoid model solve the forward problem and inverse problem.
过程的模糊模型和逆模糊模型均可由模糊辨识获得。
The fuzzy model and its inverse fuzzy model can be obtained by fuzzy identification.
请在船上做保护试验，它们应包括失压，过载和逆功率试验。
Please carry out the protection test on board. They should ask brige for permission.
逆冲推覆体由根带、主逆冲带和逆冲传播前缘带三部分组成。
The thrust nappe is assembled by root zone, major thrust zone and thrust front.
该电路特别适合于能量需双向流动的PWM整流和逆变场合。
The circuit is fit for the PWM rectifying and inverting situation at which the power should flow in two direction.
以自适应滤波器对发动机进行建模和逆建模，并设计控制器。
Adaptive linear filters are used as the plant model and controller.
古代传统医学体系坚信，心怀怨恨和逆天而行都容易使人心力交瘁。
Ancient traditional systems of medicine strongly believed that holding a grudge and fighting against the natural flow of events drain vitality.
镜头调制传递函数（MTF）的测量有正投影和逆投影两种方法。
There are obverse and adverse projection two methods for measure modulation transfer function(MTF) of lens.
设计了一种集充电和逆变功能于一体的大功率光伏逆变电源系统。
A kind of high power photovoltaic inverter power system, containing charge and inversion function is designed.
文中基于块增量学习和逆学习过程，提出了自适应迭代回归算法。
This paper presents an adaptive and iterative support vector machine regression algorithm (CAISVR) based on chunking incremental learning and decremental learning procedures.
船舶发电机组过载保护试验、并车试验、逆功率和逆电流保护试验；
Overload protection, and vehicle test, reverse power and reverse current protection test for marine generator.
讨论了在大型关系数据库优化设计中关系的规范化和逆规范化的应用。
In this paper, the application of normalization and denormalization in the optimization of relational database design are discussed.
由于惑迷的状态（无明）继续存在，我们便不免要遭遇种种灾难和逆缘。
Remaining in a state of confusion (ignorance), we, unavoidably, subject ourselves to this and that misfortunes and undesirable conditions.
此脉冲信号还是行计数器的触发信号，间接地控制振镜场扫的正程和逆程。
The horizontal line's counter is also activated by this signal to control galvanometer up and down.
对象和逆控制器各用一个抽头延迟线滤波器表示，用抖动方法给对象建模；
Plant and inverse controller are expressed by a tapped delay line filter respectively.
相容关系有等值关系、下反对关系、差等关系（蕴涵关系和逆蕴涵关系）；
The compatibility relation contains equivalence, subcontrariety, subaherna- tion, implication and counter-implication.
在使用神经网络完成非线性对象的模型和逆模型时，选择的训练方法很重要。
Choosing a training method is very important when using neural network to obtain the model and the inverse model of the nonlinear object.
在统计学学习中，正指标和逆指标经常被不加区分地处理，导致了许多错误。
Positive and negative indicators are often handled without being distinguished in the study of statistics, which leads to many mistakes.
介绍了在可控硅中频感应电炉中整流电路和逆变电路的常见故障及其排除方法。
The common breakdown and its removal of the rectifier circuits and inverse transforming circuits in intermediate frequency induction electric furnace for thyristor are introduced.
位置运动学的正问题和逆问题是机器人学中研究得比较多的问题，尤其是逆问题。
The positive problem and negative problem of robot location kinematics is the relatively popular research area in the robotics.
介绍了用自适应LMS滤波器离线辨识六面体单元柔性结构模型和逆模型的方法。
A method of adaptive LMS filter is presented in this paper to identify the model and inverse model of the hexahedral unit of flexible truss.
以软件方式实现一般硬件组合逻辑难以达到的指数曲线升频和逆指数曲线降频规律。
Because it is very difficult to realize a frequency pattern as exponent curve rising and inverse exponent curve falling by a common hardware logical combination, so it is achieved by software.
该系统包含升压和逆变两个环节，均采用电压外环、电流内环的双环pwm控制方式。
The two parts both adopt double loop PWM control mode which consists of outer voltage loop and inner current loop.
该方法结合了神经网络和逆系统控制的优点，能够克服系统中的不确定性和非线性因素。
The proposed controller combines the advantages of neural network and inverse system control, and can compensate the influence of uncertainty and nonlinearity.
注意尽管上面的例子只展示了对于代理类型如何声明协变和逆变。对于接口这样做也是不难的。
Note that although the above examples show how to declare covariance and contravariance for delegate types, it's not different to do so with interfaces.
长坡倒转背斜控制长坡-钢坑矿床的产出，层间剪切破碎带和逆掩断层控制着矿体的空闻位置。
The Changpo reverse anticline controls the location of Changpo-Tongkeng deposit, while the bed-parallel shear fracture zone and thrust fault control the ore bodies.
该文的方法适用于求取较为简单的二维逆z变换问题，尤以偏导数法和逆卷积法更具实际意义。
So the methods given in this paper can be used to get some simple inverse Z transform. The partial derivative method and deconvolution method are of practical use.
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