Quantities analysis of human information using GPS receiver and DLW method

GPS由美国国防部（DOD）资助和控制。虽然全球有成千上万的民用用户使用GPS，但该系统是为美国军方设计和操作的。GPS提供特殊编码的卫星信号，可以在GPS接收器中处理，使接收器能够计算位置，速度和时间。使用四个GPS卫星信号计算三维位置和接收机时钟中的时间偏移。我们已经研究过将这个全球定位系统应用于体育活动。移动距离的估计是利用手持GPS接收机和双标水法来获得精度。分析人体运动活动。对精确和近连续呼吸气体交换的验证表明，该方法准确（1 ~ 3%），精度为4% ~ 7%，具体取决于同位素剂量，消除周期长度和采样频率（两点或多点）。该方法基于一些假设，这些假设必须根据人类活动的应用加以考虑。对动力学模型的改进仍有一些争论。我们可以认为DLW方法是评估能量消耗的黄金标准。

GPS is funded by and controlled by the U.S.Department of Defense (DOD). While there are many thousands of civil users of GPS world-wide, the system was designed for and is operated by the U.S. military. GPS provides specially coded satellite signals that can be processed in a GPS receiver, enabling the receiver to compute position, velocity and time.Four GPS satellite signals are used to compute positions in three dimensions and the time offset in the receiver clock. We already have been studied to use this Global Positioning System in applying to Physical Activity. Estimation of moving distance is to get accuracyusing handy GPS receiver And with Doubly Labeled Water method. Human movement activity was analyzed. Validation against the precise and near continuous respiratory gas exchange has demonstrated that the method is accurate(1〜3%)and has a precision of 4% to 7%, depending isotope dose, length of elimination period, and frequency of sampling(two-point vs. multipoint). The method is based on a number assumptions that must be taken into account depending on the application of human activity. There is still some debate on refinement of the kinetic model. And we can consider the DLW method the gold standard for assessing energy expenditure.