国家开放大学：2008—2009学年第二学期“开放专科”工程造价管理专业建筑材料（A）期末试题（7月）

国家开放大学：2007—2008学年第二学期“开放专科”工程造价管理专业建筑材料（A）期末试题（7月）

国家开放大学：2006—2007学年第二学期“开放专科”工程造价管理专业建筑材料（A）期末试题（7月）

唐山开放大学：《制药工程学》课程教学资源（试卷习题）模拟试题A及答案

The manufacturing(or production) process of a factory, in a broad sense, is the sum total of separate processes involved in the conversion of sum total raw materials or semi-finished products into final as far as products. AS far as a factory is concerned, its blank products can be blanks, finished parts

When the only force acting on a particle is always directed to- wards a fixed point, the motion is called central force motion. This type of motion is particularly relevant when studying the orbital movement of planets and satellites. The laws which gov- ern this motion were first postulated by Kepler and deduced from observation. In this lecture, we will see that these laws are a con- sequence of Newton's second law. An understanding of central

An accelerometer is a device used to measure linear acceleration without an external reference. The main idea has already been illustrated in the previous lecture with the example of the boy in the elevator. Clearly, if we know the weight of the boy when the acceleration is zero, we can determine from the reading on the scale the value of the acceleration. In summary, the acceleration will produce an inertial force on a test mass, and this force can be nulled and measured with precision. Below we have sketch of a very simple one axis accelerometer

2.0 引言 2.1 DA转换技术 2.2 后向通道D/A转换器接口 2.2.1 D/A转换器工作原理 2.2.2 D/A转换器的性能指标 2.2.3 典型芯片-DAC0832 2.2.4 12位芯片DAC1210 2.3 输出方式 2.3.1 电压输出方式 2.3.2 电流输出方式

We will start by studying the motion of a particle. We think of particle as a body which has mass, but has negligible dimensions. Treating bodies as particles is, of course, an idealization which involves an approximation. This approximation may be perfectly acceptable in some situations and not adequate in some other cases. For instance, if we want to study the motion of planets it is common to consider each planet as a particle

In the previous lectures we have described particle motion as it would be seen by an observer standing still at a fixed origin. This type of motion is called absolute motion. In many situations of practical interest, we find ourselves forced to describe the motion of bodies while we are simultaneously moving with respect to a more basic reference. There are many examples were such situations occur. The absolute motion of a passenger inside an aircraft is best