基于新型核与灰度序列的时滞GM(1,N)模型及其应用

为了解决GM(1,N)模型在新型核与灰度的基础上,对驱动项的延迟作用机理不明确的问题,将时滞参数引入到GM(1,N)模型的驱动项中,构建了基于新型核与灰度的时滞GM(1,N)模型,分析了时滞参数的辨识方法,讨论了新模型的建模机理。为了更好地对该模型的有效性进行验证,将优化的时滞GM(1,N)模型对南京市的雾霾进行预测分析,选择GM(1,N)模型、一元回归模型与文中的优化模型进行对比。结果显示,优化模型对PM₁₀浓度的拟合精度更高,且误差均控制在5%之内,从而验证了提出的优化模型适用于具有时滞特征数据的模拟和预测。     

考虑低碳偏好及碳减排的闭环供应链回收及专利授权策略

研究考虑消费者低碳偏好的闭环供应链回收、碳减排与专利授权决策问题。分别构建制造商回收再制造、零售商回收再制造支付固定专利费、零售商回收再制造支付单位专利费的闭环供应链模型,分析低碳消费者比例、普通消费者对再制品的接受程度及碳权交易价格,对企业回收、碳减排及定价决策的影响,并比较了三种模式下企业及供应链的利润。研究表明:随着市场中低碳消费者比例及普通消费者对再制品接受程度的提高,总会使得回收率及碳减排率增加;碳权交易价格的提高,也会促使制造商提高碳减排率;对制造商来说,其利润在零售商回收再制造且支付固定专利费用下实现最优。从自身利润最优的角度出发,作为领导者的制造商将总是选择零售商回收再制造且支付固定专利费用模式。     

CLIMATIC CHANGE SINCE LITTLE ICE AGE RECORDED BY DUNDE ICE CAP

The climatic change since the Little Ice Age recorded in the Dunde Ice Cap is presentedin this paper. There have been three cold periods and three warm periods since 1400AD.Among them, the coldest one was in the 17th century. Many evidences verified the three coldand warm variations recorded in the Dundc Ice Cap. But it was found from the comparison between the Dunde Icc Cap climatic record and thewinter temperature record in Shanghai that there was a temporal dfference in climatic changebetween East China and West China. The general trend is that the cooling and warmingprocesses in West China were earlier than that in East China. In the Dunde Ice Cap, it isnow in an anomalous warm period, while it is not as warm as in Dunde Ice Cap recordaccording to the winter temperature in Shanghai. In addition to the possible cause of temporaldifference in climatic change between West China and East China, another possible cause isthat the greenhouse effect of CO_2 may already be recognizable in the Dunde Ice Cap a     

EFFECTS OF SOURCE PROPERTIES ON CUTOFF FREQUENCY f_(max)

The cutoff frequency f_(max) of radiation from earthquakes is one of the important parameters for studying the source process. By theoretical analysis and numerical experiments on acceleration Fourier spectrum it is suggested that f_(max) mainly depends on the lower values of slip rise time. This result can be used to explain the observational fact that the greater the earthquake magnitude, the smaller the value of f_(max).     

A New Triterpenoid from "Gualou-xiebai-baijiu-tang" Consisting of Fructus trichosanthis and Bulbus allii mtacrostemi

A new triterpenoid saponin was isolated by bioactivity-guided isolation from "Gualou-xiebai-baijiu-tang" consisting ofFructus trichosanthisi and Bulbus allii macrostemi. Its structure was determined as 3-O-β-D-galactopyranosyl-hederagenin 28-O-β-D-xylopyranosyl (1→6)- β-D-galactopyranosyl ester by means of chemical evidences and spectral analysis.     

A Zn(Ⅱ) 5-Aminoisophthalate Coordination Polymer

The title compound, [Zn(AIP)(4,4-bipy)0.5(H2O)]n·0.75nH2O 1, was synthesized via the hydrothermal reaction of Zn(OAc)2 with 5-aminoisophthalic acid (H2AIP) and characterized by elemental analysis and infrared spectra. The complex crystallizes in monoclinic system, space group P21/c with a = 12.672(1), b = 7.6557(4), c = 16.181(1) (A),β = 109.187(2)o, V = 1482.6(2) (A)3, Z = 1, C52H52N8O23Zn4, Mr = 1418.58, Dc = 1.589 g/cm3, F(000) = 724 and μ(MoKα) = 1.685mm-1. The final R = 0.0702 and wR = 0.1524 for 1847 observed reflections with Ⅰ ＞ 2σ(I), and R = 0.0873 and wR = 0.1664 for all data. X-ray diffraction studies reveal that the title compound has an interesting 2D microporous architecture with guest water molecules inside the channel.     

N－N－二甲基甲酰胺缩二甲醇对喋呤的甲基化反应

用N，N-二甲基甲酰胺缩二甲醇[（CH3）2NCH(OCH3)2，1]和蝶呤（2-氨基-4- 羟基蝶啶）衍生物在极性有机溶剂中反应一般得到脒化产物：N^2-(N，N-二甲基氨 基亚甲基)-蝶呤衍生物，但是在1，4-二氧六环中进行以上反应时发现，N，N-二甲 基酰胺缩二甲醇（1）不仅是脒化试剂，而且也是蝶呤化合物的甲基化试剂，并且 也依据蝶呤的N^2-位的不同取代基进行选择性的N(3)-或O^4-甲基化反应。     

恩曲他滨的合成方法

综述了利用消旋体拆分或不对称合成制备手性药物恩曲他滨的方法。参考文献12篇。     

四（α—噻吩甲酰三氟丙酮）合铕（Ⅲ）酸十六烷基吡啶LB膜的研究

标题配合物（Ⅰ）和硬脂酸（Ⅱ）的CHCl3溶液按不同摩尔比Ⅰ：Ⅱ=1：α（α=1,2,4,8,12)混合后，α≥2时，其π-A曲线比单一的标题配合物的有明显改善，Ⅰ：Ⅱ=1：4时，在亲水石英基片上制备了Z型LB膜，并用紫外光谱、荧光光谱和小角X射线衍射进行了表征。     

大口径毛细管气相色谱法直接测定复方阿司匹林制剂

建立了同时测定复方阿司匹林制剂中阿司匹林、对乙酰氨基酚、咖啡因及降解产物水杨酸的大口径毛细管气相色谱法。在HP-1大口径色谱柱上直接进样,无需衍生化处理,所测组分与内标物2 min内达到基线分离。各组分在其线性范围内线性关系良好(相关系数均高于0.999),检出限分别为10.0μg/L、5.0μg/L、1.0μg/L和1.0μg/L。经样品测定,平均回收率为97.46%~101.24%。该法简便、快速、准确、重现性好,可用于复方阿司匹林制剂的质量控制。