In this paper, the authors present the design and implementation of an Interoperable Object Platform for Multi-Databases (IOPMD). The aim of the system is to provide a uniform object view and a set of tools for object...In this paper, the authors present the design and implementation of an Interoperable Object Platform for Multi-Databases (IOPMD). The aim of the system is to provide a uniform object view and a set of tools for object manipu lation and query based on heterogeneous multiple data sources under client/server environment. The common object model is compatible with ODMG2.0 and OMG'sCORBA, which provides main OO features such as OID, attribute, method, inheri tance, reference, etc. Three types of interfaCes, namely Vface, IOQL and C++ API, are given to provide the database programmer with tools and functionalities for application development. Nested transactions and compensating technology are adopted in transaction manager. In discussing some key 'implementation techlliques, translation and mapping approaches from various schemata to a common object schemaare proposed. Buffer management provides the data caching policy and consistency maintenance of cached data. Version managemellt presellts some operations based on the definitions in semantic version model, and introduces the implemelltation of the semantic version graph.展开更多
The theory of motivation is a theory which takes the executora's motivation as the basis of moral judgment. One presupposition of the theory is that motivation can be a common object of understanding. However, motiva...The theory of motivation is a theory which takes the executora's motivation as the basis of moral judgment. One presupposition of the theory is that motivation can be a common object of understanding. However, motivation exists only in the heart of the executor, and cannot be known exactly by others, so motivation cannot be perceived like a common object, and thus, logically, cannot be the basis of moral judgment. Even if the executor's motivation is accepted by others and turned into a common object, the motivation still cannot become the valid basis of a moral judgment. This is the dilemma of the theory of motivation. In practice, the dilemma appears as follows: if one insists on the theory of motivation, one can be led to the result that people do evil with good intentions. However, just because motivation cannot be the basis of moral judgment does not mean that motivation is of no significance. Good motivation is always better than evil motivation. Therefore, in moral education we should carry out motivation education and teach people to strive to have good motivations for their behavior. This is the value of motivation theory.展开更多
文摘In this paper, the authors present the design and implementation of an Interoperable Object Platform for Multi-Databases (IOPMD). The aim of the system is to provide a uniform object view and a set of tools for object manipu lation and query based on heterogeneous multiple data sources under client/server environment. The common object model is compatible with ODMG2.0 and OMG'sCORBA, which provides main OO features such as OID, attribute, method, inheri tance, reference, etc. Three types of interfaCes, namely Vface, IOQL and C++ API, are given to provide the database programmer with tools and functionalities for application development. Nested transactions and compensating technology are adopted in transaction manager. In discussing some key 'implementation techlliques, translation and mapping approaches from various schemata to a common object schemaare proposed. Buffer management provides the data caching policy and consistency maintenance of cached data. Version managemellt presellts some operations based on the definitions in semantic version model, and introduces the implemelltation of the semantic version graph.
文摘The theory of motivation is a theory which takes the executora's motivation as the basis of moral judgment. One presupposition of the theory is that motivation can be a common object of understanding. However, motivation exists only in the heart of the executor, and cannot be known exactly by others, so motivation cannot be perceived like a common object, and thus, logically, cannot be the basis of moral judgment. Even if the executor's motivation is accepted by others and turned into a common object, the motivation still cannot become the valid basis of a moral judgment. This is the dilemma of the theory of motivation. In practice, the dilemma appears as follows: if one insists on the theory of motivation, one can be led to the result that people do evil with good intentions. However, just because motivation cannot be the basis of moral judgment does not mean that motivation is of no significance. Good motivation is always better than evil motivation. Therefore, in moral education we should carry out motivation education and teach people to strive to have good motivations for their behavior. This is the value of motivation theory.