Hitherto-Unexplored Photodynamic Therapy of Ag2S and Enhanced Regulation Based on Polydopamine In Vitro and Vivo

Given their superior penetration depths, photosensitizers with longer absorption wavelengths present broader application prospects in photodynamic therapy (PDT). Herein, Ag₂S quantum dots were discovered, for the first time, to be capable of killing tumor cells through the photodynamic route by near-infrared light irradiation, which means relatively less excitation of the probe compared with traditional photosensitizers absorbing short wavelengths. On modification with polydopamine (PDA), PDA-Ag₂S was obtained, which showed outstanding capacity for inducing reactive oxygen species (increased by 1.69 times). With the addition of PDA, Ag₂S had more opportunities to react with surrounding O₂, which was demonstrated by typical triplet electron spin resonance (ESR) analysis. Furthermore, the PDT effects of Ag₂S and PDA-Ag₂S achieved at longer wavelengths were almost identical to the effects produced at 660 nm, which was proved by studies in vitro. PDA-Ag₂S showed distinctly better therapeutic effects than Ag₂S in experiments in vivo, which further validated the enhanced regulatory effect of PDA. Altogether, a new photosensitizer with longer absorption wavelength was developed by using the hitherto-unexplored photodynamic function of Ag₂S quantum dots, which extended and enhanced the regulatory effect originating from PDA.     

变频调速泵在滤池反冲洗中的节能效果

为了响应现在我国大力倡导的节能的政策,决定将滤池反冲洗中所用的水泵进行改造,把原来的高位水箱反冲洗系统改为利用变频技术.采用水泵直接反冲洗来达到节能的目的,计算了滤池反冲洗采用变频调速泵所节约的电耗,并对其节能效果进行了分析.     

具有（W~＊－W）CPCP的共轭空间X

本文引进了概念（ｗ￣＊一ｗ）ＣＰＣＰ，并证明了：若ｘ”具有（ｗ￣＊一ｗ）ＣＰＣＰ，则Ｘ￣＊的每个非空ｗ￣＊一紧凸子集Ｋ的弱￣＊一弱连续点集是Ｋ的弱￣＊一稠密子集。     

在管理信息系统中单据设计的新方法

在分析PowerBuilder中用户对象的基本概念与特点基础上，提出了利用用户对象技术实现MIS(管理信息系统)中单据设计功能的方法，并给出了详细的实现过程。实际应用表明，该方法可使用户按企业的实际需要对单据的录入界面进行自由设计，无需修改软件即可满足不同用户的需求，适合各种管理信息系统的单据设计，具有通用性。     

一类多维指数分布的参数估计

考虑生存函数为(F)(x1,x2,…,xn)=P{X1＞x1,…,Xn＞xn}=exp{-[n∑i=1(xi/θi)1/δ]δ}(0＜xi＜∞,0＜δ≤ 1,0＜θi＜∞,i=(1,n))的一类多维指数分布,给出了它的密度函数的表示式,并讨论了它的性质.提出了相关参数δ的估计(^δ),证明了(^δ)有相合性和渐近正态性,得到了(^δ)的渐近方差σ2δ.最后还给出了若干随机模拟的结果.     

不完全信息群体决策专家权重的集结

本文对于属性权重信息和属性效用信息都不完全的群体多属性决策问题，通过构造属性值区间和运用系统聚类分析法，对群体决策中的专家进行分类，并确定每位专家的权重．     

Vanadium valency charge state in solid solutions ScNb2−2xTa2xVO9

Phase equilibria in the Sc₂O₃-V₂O₅-Nb₂O₅-Ta₂O₅ system and properties of ScNb_2−2xTa_2xVO₉ phases were studied by X-ray phase analysis, optical and radio spectroscopy. A continuous series of solid solutions was shown to exist at 0≤x≤1. V(IV) centers with different crystallographic surrounding were detected for all the considered compositions. A correlation between the number of V(IV) ions and the width of the forbidden gap in the solid solutions was found.     

TPL企业强化TQM的途径研究

探讨TPL企业的服务质量特性及TQM内涵和评价指标体系，提出强化TPL企业TQM的主要途径：（1）确立科学的TPL企业质量观；（2）坚持不断地改进组织中每项工作的质量，深化注重企业质量管理的文化建设；（3）建立可精确地度量并向员工授权的有效TQM机制；（4）加大企业资源在TQM的战略性投入．     

谈影视作品与大学英语教学的整合

要提高大学英语教学质量，必须丰富教学手段。利用影视作品辅助大学英语教学是一种很好的教学手段。本文就影视作品的优势、具体的教学应用及应用中的注意事项进行探讨。