The paper points out the weaknesses in the npv / irr investment decision model and suggests new methods to avoid them . entropy theory was a concept in physics . with its development in information theory , the method of entropy is used in many subjects 应用物理热力学中熵的概念及其在信息论中的发展，将熵可以度量事件发展的不确定性的特点应用到投资决策的分析中。
The scientists leading the diamond project signed a memorandum of understanding last year with the shanghai synchrotron radiation facility and the shanghai institute of applied physics to promote collaboration on synchrotron development last year ）共同投资。去年钻石光源项目的领衔科学家们和上海光源，上海应用物理研究所签署了合作备忘录，共同推动两国在此领域的科技合作。
Beginning in 1978 , to serve china s renewed efforts for national construction and science development , tsinghua re - established the department of applied mathematics , the department of modern physics , the department of chemistry and the department of biology 1978年后，根据国家建设和科学发展的需要,清华大学先后成立了应用数学系现代应用物理系化学系生物科学与技术系四个理科系。
According to the theory of light transmission , we derived the expression of rotation angle as a function of the dielectric constant conductivity of er fluid , and ( the angle between the electric vector of linearly polarized light and electric field ) from maxwell ' s equations and fresnel reflection , on the condition of several appropriate approximations and assumptions 进而导出了非均相结构电流变液在外电场与光场交互作用下旋光角与(入射线偏振光振动方向与外加电场方向间夹角)及参数(为外加电场e 、分散颗粒介电常数、体积分数、绝缘油介电常数、位置矢量( ? )等量的函数)的西北工业大学应用物理系硕士学位论文摘要理论表达式。
An idea to establish a cancellation database on the basis of the smooth of rcs of the protected target is also introduced the field scattered by facets and fringes and the multiple scattering effect are calculated by a hybridization of the theory of physical optics , equivalent currents and areal projection - physical optics , which are utilized to compute the rcs of an aeroplane 还提出了根据被保护目标rcs的平滑值确定对消数据库的思想。应用物理光学法、等效电磁流法和区域投影物理光学方法计算了面元散射场、劈边缘绕射场以及多次散射场，采用此方法计算了某飞机的rcs ，并对该目标的rcs进行了平滑处理。
We present a calculation program in this paper , based on the physical optical theory ( po ) theary to predict bse and bses for a conical type of radome . the po theory is used to determine the ficticius currents electrical and magnetic on the inner face of the radome , which is illuminated directly by the radar antenna , and then use the transmission matrix mothod to determine the outer surface ficticion currents , the radiated from the antenna through radome is considered as the radiation field of these ficticion current 本文提出了一种基于物理光学理论预测正圆锥天线罩瞄准误差及瞄准误差斜率的计算程序。首先,雷达天线照射到天线罩内壁,应用物理光学法求出内壁等效的电流和磁流,其次,根据传输矩阵理论求出外壁等效电流和磁流,天线通过天线罩的远区场即可认为是外壁等效电、磁流产生的场。
The system has a satisfactory variety of functions , strong adaptability , and is easy to use . another system is also developed for supervision and decision - making of ship navigation . the system can analyze navigation conditions , select and check navigation route based on data from physical and mathematical models 该系统应用物理模型和数学模型的计算结果，结合形象、直观的图形显示，能方便地对河道的航行条件进行分析，并能进行航线的选择和检验；通过设定多个参数的大小，能进行各种不同的航行演示，满足实际的需要。
