Challenges of Vietnamese Agricultural Cooperatives in the 21st Century:The Link Between Efficiency and Legality

The article shows that the situation of agricultural cooperatives in the world in general and agricultural cooperatives in Vietnam in particular are facing certain challenges in the context of globalization in the 21st century.The article points out limitations on:the nature,principles of democratic member control and principles of surplus distribution of the International Cooperative Alliance,as well as Vietnamese law in cooperative management.

Distributed Energy Saving Mechanism Based on CoMP in LTE-A System

To reduce the energy consumption of the LTE-A system,a distributed energy-saving mechanism based on Co MP(Co MPDESM) is proposed to solve the inadequate coverage problem under the dormant cells.First,the network is divided into clusters based on the equivalent cell principle.Then,we transfer global optimization into a group of subproblems.Second,a joint processing-based cooperative cell selection model is constructed to determine cooperative cells and dormant cells.Third,the compensative cells with a determined threshold are selected to control users' access.Finally,a simulation is implemented in Matlab.Results show that the energy-saving rate can reach 36.4% and that the mechanism meets the network coverage requirement.Thus,joint processing can be effectively applied in an energy saving mechanism and used to improve the network performance of edge users without increasing transmission power.

Twin Prime Distribution Problem

The distribution of twin prime numbers is discussed. The research method of corresponding prime number distribution is proposed. The distribution of prime numbers corresponding to integers and composite numbers is discussed. Through the corresponding prime distribution rate of integers and composite numbers, it is found that the corresponding prime distribution rate of composite numbers approaches the corresponding prime distribution rate of integers. The distribution principle of corresponding prime number of composite number is proved. The twin prime distribution theorem is obtained. The number of twin prime numbers is thus obtained. It provides a practical way to study the conjecture of twin prime numbers.

A research on development of agritourism in China-a case study of Beijing

Agritourism is a new kind of industry which combined agriculture with tourism and started from the 1970s with the development of agricultural economy and meeting the demand of touring consumption. It is an important way to exploit natural resources sufficiently, change the simplistic structure and promote the high efficient agriculture. It provides a new space for people to enjoy themselves and appreciate rural scenery. In light of its function, it can be classified into sightseeing, dietetics, shopping, recreation, leisure, health and vocationing. At present, most agritourism is concentrated at the suburbs of big cities, comparative developed regions along the seashore, scenic spots nationalities inhabited areas and regions of special agriculture. Beijing is a metropolis where tourism is comparatively well developed with advantageous conditions. Agricultural landscape is the theoretical base of agritourism. So it is important to construct agricultural landscape and artificial landscape is the premise to develop agritourism.

Sampled-data based average consensus with measurement noises: convergence analysis and uncertainty principle

In this paper, sampled-data based average-consensus control is considered for networks consisting of continuous-time first-order integrator agents in a noisy distributed communication environment. The impact of the sampling size and the number of network nodes on the system performances is analyzed. The control input of each agent can only use information measured at the sampling instants from its neighborhood rather than the complete continuous process, and the measurements of its neighbors＇ states are corrupted by random noises. By probability limit theory and the property of graph Laplacian matrix, it is shown that for a connected network, the static mean square error between the individual state and the average of the initial states of all agents can be made arbitrarily small, provided the sampling size is sufficiently small. Furthermore, by properly choosing the consensus gains, almost sure consensus can be achieved. It is worth pointing out that an uncertainty principle of Gaussian networks is obtained, which implies that in the case of white Gaussian noises, no matter what the sampling size is, the product of the steady-state and transient performance indices is always equal to or larger than a constant depending on the noise intensity, network topology and the number of network nodes.

The Basic Principles and Value Dimensions of Achieving Distributive Justice through Social Institutions

To achieve the value goal of distributive justice, human society turns to the rational design and organization of social institutions. The construction of social institutions aimed at distributive justice should observe the following principles： equal opportunity, equal distribution of benefits and obligations, rational distribution criteria and procedures, and rectification of injustices. Social institutions established on these principles demonstrate inherent fairness and can ensure that social resources are distributed in an equitable way. For social institutions to ensure distributive justice is of great practical significance because this helps society integrate individuals＇ singular intentionality of pursuing distributive justice into a collective intentionality that fosters a social perspective on investigating distributive justice, establishes an egalitarian concept of distributive justice, and provides more effective protection for acts promoting distributive justice and stronger sanctions for acts undermining it. This maintains and enhances the interests of both advantaged and disadvantaged groups in distribution.