例如，用例的前置及后置条件、输入和输出定义服务依赖关系、边界和数据要求。
For example, the pre - and post-conditions, inputs, and outputs of the use case define the service dependencies, boundary, and data requirements.
根据这个用例的目标，在测试用例的前置条件或者设置中还需要一些数据输入。
Depending on the goal of the use case, some data input will be required in the pre-conditions or setup of the test case.
另一个前置条件是运行前述约束检测算法所需的数据，要在模型中是实际可用的。
The other precondition is that the data that is needed to run the constraint-checking algorithm defined above is actually available in the model.
通过求解前置条件可以判断路径的可执行性，还可以求出使程序沿着该条路径运行的输入数据。
By solving predicates the feasibility of a path can be decided and the input data making the program follow this path will be generated.
通过对噪声特性的分析，提出了用前置带通滤波器来提高信噪比的方法，改善微弱信号时数据通信的效果。
This paper analyses the characteristics of noise and presents the mernod of promoting S/N by inserting a band-pass pre-filter, which can reduce the Pe in data communication under small signal.
集成式信号采集装置包括传感器、前置器、数显表头、USB数据采集卡和供电电源；
The second one is integrated signal acquisition device made up of sensor, front end circuit, data-showing meter, USB data acquisition card and power supply.
数据显示所构建的前置库水生生态系统处于成熟状态。
The datas shows that water ecosystem in reservoir region is balanced and stable.
系统关键技术含气动数据结构的设计、数据的标准化表示、数据的对比分析及模型数据的前置处理。
The key techniques of system include design of data structure, standardization of data expression, data comparative analysis and pre-process of model data.
本文将专家在平衡—模拟倒摆小车时记录下来的数据经处理后，用监督式学习的方法训练一前置式神经网络。
In this paper, we present a method of training a feedforward neural network using supervised learning scheme to balance an inverted pendulum and cart system.
通信前置系统具备通道管理、差错控制、传输控制、规约解释、报文处理和数据备份等重要功能。
FEPC has many important functions, such as communication management, error control, protocol conversion, data backup, and so on.
随着标准化程度的逐步提高和成本数据库的逐步完善，房地产业具备了前置管控成本的基础。
As the gradual improvement of the standardization level and cost database, real estate has the basis to control cost in the early stage.
在吉林省电力调度数据网的平台上，开发了吉林省电力调度中心EM S网络专用前置机。
On the data network platform of Jilin Power Dispatching Center, the special fornt-end computer of EMS of Jilin Electric Power Dispatching Center was developed.
在吉林省电力调度数据网的平台上，开发了吉林省电力调度中心EM S网络专用前置机。
On the data network platform of Jilin Power Dispatching Center, the special fornt-end computer of EMS of Jilin Electric Power Dispatching Center was developed.
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