从资源管理到资产经营——论我国城市土地管理模式的转变

“经营土地”是城市治理市场化条件下政府加强土地资产管理的新理念,其实质就是要运用市场经济手段,对土地资产实行市场化运作,实现土地资源的优化配置,从而实现土地资产的价值。从资源管理型转变为资产经营型,这是我国城市土地管理改革的必然选择与现实取向

Research on High S/P of Phosphor-type White LED with High Color Temperature

对于白光照明而言,显色指数(CRI)和暗视觉下光通量与明视觉下光通量的比值(S/P)是衡量白光光源质量的两个重要参数。CRI反映的是待测光源下物体色彩还原能力;而S/P值越高的光源下人眼视物越清晰,对节能也具有一定作用。一般而言,这两个参数越高越好;然而在实际中,两者是一对矛盾体。当前的大部分白光光源的S/P值普遍低于2.5。白光发光二极管(LED)具有光谱可调特性,因此可以通过优化光谱,在满足一定的CRI下获得更高的S/P值。首先模拟光谱,然后通过计算机编程调节光谱峰值波长、相对光强度等光谱参数,最终获得高色温(6 500 K)下高S/P值光谱,对于节能照明光源设计具有重要参考价值。For white light illumination, color rendering index(CRI) and scotopic/photopic(S/P) ratio are twocritical parameters to evaluate the quality of white light source. The CRI is introduced to describe the color fidelityof objects under tested light sources. Under light sources with higher S/P values, human eyes can see more clearly,and it also has a certain effect on energy saving. In general, the higher is the values of the two parameters, the quali-ty of the illumination effect is better. However, there is a trade-off between them. The S/P value of most of the cur-rent white light sources is generally less than 2.5. White light emitting diode(LED) has spectrum adjustment charac-teristic, so higher S/P value is obtained under the condition of meeting the certain CRI through optimizing spectrum.Firstly, LED spectrum is simulated, and then spectrum parameters such as spectrum peak wavelength and relativelight intensity are adjusted through computer programming. Finally, high S/P value spectrum under the high colortemperature of 6 500 K is obtained, which has an important reference value for energy-saving illumination lightingsource design.中德国际科技合作项目(2015DFG62190

在IBM-PC/XT上研制通用色谱数据处理系统

在IBM-PC/XT微机上发展一种能对包括肩峰在内的各种不同峰形检测判别的通用色谱数据处理软件。实验表明, 此软件不仅在色谱峰形的检测判别性能方面优于国外同类产品, 而且能比较准确地用全谱图拟合法对重垒峰、肩峰进行定性和定量

在IBM-PC/XT上研制通用色谱数据处理系统

在IBM-PC/XT微机上发展一种能对包括肩峰在内的各种不同峰形检测判别的通用色谱数据处理软件。实验表明, 此软件不仅在色谱峰形的检测判别性能方面优于国外同类产品, 而且能比较准确地用全谱图拟合法对重垒峰、肩峰进行定性和定量