An equation involving the F.Smarandache multiplicative function

The main purpose of this paper is using the elementary methods to study the solutions of an equation involving the F.Smarandache multiplicative function, and give its all positive integer solutions

Value distribution of the F.Smarandache LCM function

The main purpose of this paper is using the elementary methods to study the value distribution properties of the function SL(n), and give a sharper value distribution theorem

Palladium-catalyzed heterocycles synthesis via carbonylative activation of Ar-X and Ar-H bonds

This thesis composed of two major parts. The first part mainly contains the carbonylation of aryl halides towards heteroaromatic ring synthesis catalysed by homogeneous palladium systems. The second part includes the investigation of carbonlytive C-H functionalization for the preparation of heterocycle also. The resulted heterocycles such as quinazolinone, isoquinolin-1(2H)-one, phthalimides,isoindoloquinazoliones, 2-quinazolines and N-(2-pyridyl)indoles constitute an important class of life science molecules which are frequently encountered in the medicinal and biological chemistry.Diese Arbeit besteht aus zwei Teilen. Im ersten Teil werden Carbonylierung von Arylhalogeniden an heteroaromatischen Ringsystemen in Gegenwart von homogenen Palladiumkatalysatoren behandelt. Im zweiten Teil dieser Arbeit werden cabonyliernde C-H Aktivierungen an Heterocyclischen Verbindungen beschrieben. Mit diesen Reaktionen konnten verschiedene Substanzklassen synthetisiert werden, unter anderem Quinazolinone, Isoquinolin-1(2H)-one, Phthalimide. Die Intention für die Synthese der aufgeführten Substanzen ist ihre wichtige Bedeutung als Leitstruktur in der medizinischen und biologisch Chemie

The Impact of User Heterogeneity on Knowledge Collaboration Performance

Existing research showed that the social Q & A community is centred on user participation and can improve knowledge collaboration performance by means of heterogeneous knowledge, but it did not reveal the process and mechanism. This paper takes the user behaviours of the Zhihu which is the largest social Q & A community in China as the research object. From an interactive perspective, it builds a research model of the relationship between user heterogeneity and knowledge collaboration performance by establishing measurement indicators for relationship analysis according to the user behaviours data of Zhihu. The results show that there is an inverted Ushaped relationship between user heterogeneity and knowledge collaboration performance, and the interpersonal interaction of users plays a mediating role in the relationship between user heterogeneity and knowledge collaboration performance, while the mediating effect of machine interaction is not significant. This paper, based on this, puts forward some suggestions for better development of social Q & A community