As the behavior of breaking credit is more womed by people in C2C transactions, all state variables in the C2C transaction system of credit signal transmission mechanism and punishment mechanism may have many results ...As the behavior of breaking credit is more womed by people in C2C transactions, all state variables in the C2C transaction system of credit signal transmission mechanism and punishment mechanism may have many results after credit is cracked by seller. In this paper, the development and change trend of seller＇s credit behavior is studied by taking seller＇s behavior of cracking credit as the initial state. By a QSIM qualitative research, how the credit decision of an individual develops is found under the joint action of the credit mechanism, signal transmission mechanism, and punishment mechanism in C2C. Based on the research result, policy suggestions are proposed for the development of the online C2C credit mechanism.展开更多
Way back in 1999,twelve volunteers locked themselves in hotel rooms in Beijing,Shanghai,and Guangzhou to participate in a“72-hour network survival experiment.”The goal was to stay in the room for three days and surv...Way back in 1999,twelve volunteers locked themselves in hotel rooms in Beijing,Shanghai,and Guangzhou to participate in a“72-hour network survival experiment.”The goal was to stay in the room for three days and survive on an allowance from the organizer,half in cash and half in electronic form,by purchasing food,bedding.展开更多
化工、纺织印染与农药化肥等产业的蓬勃发展推动着人类社会的进步,但同时也给环境治理带来了巨大难题。目前,光催化降解局限于在特定波长下针对单一有机污染物进行降解,然而现实中的情况往往更复杂。因此,开发一种多功能光催化材料用于...化工、纺织印染与农药化肥等产业的蓬勃发展推动着人类社会的进步,但同时也给环境治理带来了巨大难题。目前,光催化降解局限于在特定波长下针对单一有机污染物进行降解,然而现实中的情况往往更复杂。因此,开发一种多功能光催化材料用于光催化降解不同有机污染物显得尤为重要。采用一步无模板溶剂热法合成了核壳结构的C-TiO_(2)复合材料前驱体,并在氩气气氛下煅烧得到高结晶度的C-TiO_(2)复合光催化材料。运用SEM、TEM、XRD和TG等表征手段对材料进行表征,结论如下:550℃煅烧时的样品为包含少量碳的高结晶度的锐钛矿相TiO 2,且550℃煅烧时的样品依然保持了完整的核壳结构。此外,C-TiO_(2)复合材料的比表面积高达85.69 m 2·g^(-1),平均孔径为16.4 nm以及孔体积为0.423 m 3·g^(-1)。在UV-Vis光照射下,C-TiO_(2)复合材料分别对罗丹明B(RhB)、亚甲基蓝(MB)和刚果红(CR)3种染料显示出增强的光催化降解活性。展开更多
文摘As the behavior of breaking credit is more womed by people in C2C transactions, all state variables in the C2C transaction system of credit signal transmission mechanism and punishment mechanism may have many results after credit is cracked by seller. In this paper, the development and change trend of seller＇s credit behavior is studied by taking seller＇s behavior of cracking credit as the initial state. By a QSIM qualitative research, how the credit decision of an individual develops is found under the joint action of the credit mechanism, signal transmission mechanism, and punishment mechanism in C2C. Based on the research result, policy suggestions are proposed for the development of the online C2C credit mechanism.
文摘Way back in 1999,twelve volunteers locked themselves in hotel rooms in Beijing,Shanghai,and Guangzhou to participate in a“72-hour network survival experiment.”The goal was to stay in the room for three days and survive on an allowance from the organizer,half in cash and half in electronic form,by purchasing food,bedding.
文摘化工、纺织印染与农药化肥等产业的蓬勃发展推动着人类社会的进步,但同时也给环境治理带来了巨大难题。目前,光催化降解局限于在特定波长下针对单一有机污染物进行降解,然而现实中的情况往往更复杂。因此,开发一种多功能光催化材料用于光催化降解不同有机污染物显得尤为重要。采用一步无模板溶剂热法合成了核壳结构的C-TiO_(2)复合材料前驱体,并在氩气气氛下煅烧得到高结晶度的C-TiO_(2)复合光催化材料。运用SEM、TEM、XRD和TG等表征手段对材料进行表征,结论如下:550℃煅烧时的样品为包含少量碳的高结晶度的锐钛矿相TiO 2,且550℃煅烧时的样品依然保持了完整的核壳结构。此外,C-TiO_(2)复合材料的比表面积高达85.69 m 2·g^(-1),平均孔径为16.4 nm以及孔体积为0.423 m 3·g^(-1)。在UV-Vis光照射下,C-TiO_(2)复合材料分别对罗丹明B(RhB)、亚甲基蓝(MB)和刚果红(CR)3种染料显示出增强的光催化降解活性。
