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Developing production and operation in scales in the major grain producing areas is the direction of the paper. Seizing the opportunity of modern agriculture comprehensive reform in two plains (Songnen Plain and Sanjiang Plain) of Heilongjiang Province and supporting to build a new type of production and management based on the big grain production householding, which plays demonstration and leading roles, have an important strategic position in improving agricultural comprehensive production capacity and ensuring national food security. In this paper, based on the survey data about the big grain production households production operations and analyses of the obstacles in expansion of production in Heilongjiang Province, specific suggestions in supporting the development of the big grain production household were put forward, such as, increasing agricultural production socialized level; perfecting the service system of land transferring; improving financial policies and farmer-friendly policy measures and perfecting the agriculture socialized service system.

In recent years, the great achievements of basic medical and healthcare services of BRICS have gained great attention and acknowledgement from the whole world. In their medical system reform, India, Brazil, Russia and South Africa have established their medical systems with their own characteristics. This provides valuable references for China in its critical stage of medical system reform. This paper explored the experience of BRICS’ reform of medical system in order to offer some references and guidance for the establishment of basic medical and health services with Chinese characteristics and conforming to Chinese practice.

Farmers as the largest population group in China, their integrity levels impact the process of socialist modernization and construction of socialist harmonious society directly. Farmers’ credit construction is an important part of the construction of new socialist countryside. As the subject of construction of new socialist countryside, some farmers are weak in credit awareness. Low credibility of traditional culture, uncompleted credit system construction and farmers’ narrow thoughts led to their lacking of credit awareness. We should perfect the rural credit system, strengthen the construction of rural credit culture and enhance the construction of grass-roots credit administration, set integrity example model and take other measures to promote farmers’ awareness of the integrity.

This paper contributed to the pool of studies about agricultural surplus labor in China, also acted as the root to the imminent settlement of the issues concerning agriculture, countryside and farmers. Using data from survey of agricultural surplus labor in 2012, which covered three provinces in northern, midwestern and southern parts of China, this paper analyzed the influential factors on agricultural surplus labor professionalization by adoption of a logistic regression model. It showed that agricultural surplus labor shortage could be explained by low-quality professionalization. It was a feasible and effective way to solve the issue of workforce shortage during economic downturn by improving agricultural surplus labor's professionalization.

To eliminate the overshoot of lensbarrel of an aerial camera in process of position control,a tracking differentiator was used to process step signals and to design a position transient process to control accurately the lensbarrel position without overshoots.First,the theory of the tracking differentiator was described and its characteristics were expatiated.And then,by taking position step response with a 90° input as an example,the transient process was designed and compared with that of no transient process design.Experiment results show that the position overshoot of lensbarrel can be eliminated completely through the appropriate transient process design,and the regulation time is reduced also.In the case of 90° step input,the system overshoot is reduced from 24.4% to zero and the regulation time is shorten by 28.8%.Furthermore,the fast position control of the lensbarrel was realized with non-overshoot in omnirange,in which the least square method was used to fit a curve of step input and a speedability parameter in transient process.The optimum parameter of the transient process was calculated according to the step input in control process.This method has been used in the lensbarrels of aerial cameras,and it obtains a good effect and provides significant and practical values for improving the dynamic performance of systems.