Propagation Analysis of 2.4 GHz Wireless Sensor Network Signal in a Plantation

Wireless sensor network is a popular technology on information acquisition and processing, which has been widely used in plantation ecological monitoring domain. The plantation environments, including antenna height-gain, depolarization, terrain, humidity and many factors have great influences on the propagation of 2.4GHz wireless sensor network radio frequency signal. In this paper, a complete research for propagation law of 2.4GHz wireless sensor network signal in plantation environment is presented, with using regression of support vector machines based on experimental data. A single variable prediction model is established on field strength of wireless sensor network signal in plantation environment, thus compares it with the original experience prediction model and measured data. The establishment of aforesaid model provides an important theoretical support for determining the max effective communication range of wireless sensor node and the nodes' rational distribution. It will certainly promote the application of wireless sensor network in plantation ecological monitoring field

Realization Path of High-quality Development of Dairy Industry in Henan Province in the New Period

On the basis of objectively understanding the reality and existing problems of dairy industry development in Henan, according to the new development concept and the goal of high-quality development of animal husbandry, combined with the reality of Henan Province, this paper puts forward the realization path from the aspects of establishing new development concept, paying attention to innovation drive, perfecting support system, improving organization degree and strengthening policy support, which provides a useful reference for the high-quality development of dairy industry in Henan Province

Research on the Policy Effect and Mechanism of Carbon Emission Trading on the Total Factor Productivity of Agricultural Enterprises

Given the rural revitalization strategy in the new era, agricultural development is faced with the dual constraints of resources and the environment. Promoting the green development of agriculture is one of the important missions to solve major social issues in the new era. The implementation goal of the carbon emission trading system is to achieve a win-win situation between carbon emission reduction and green development. To evaluate the effectiveness of the carbon emission trading system on agricultural enterprises, this paper uses a double-difference model to analyze the policy effect and mechanism research path of the impact of the carbon emission trading system on the total factor productivity of agricultural enterprises. The results based on the panel data of listed agricultural companies from 2010 to 2020 show that (1) carbon emission trading rights have significantly improved the total factor productivity of agricultural enterprises; (2) green innovation in carbon emission trading rights have an impact on the total factor productivity of agricultural enterprises; and (3) heterogeneity analysis shows that the effect of carbon emission trading rights on the total factor productivity of agricultural enterprises mainly exists in large-scale, nonstate-owned, high-debt enterprises, enterprises in the eastern region, and enterprises with government subsidies. Therefore, in the future, China should continue to implement the current carbon emission trading rights system in air pollution control, and at the same time, it needs to be supplemented by government intervention and other means for long-term governance. In conclusion, the study provides a reference value for promoting the realization of the long-term goal of “low carbon” and “high quality” green development of agricultural economy and for making reasonable and effective behavioral decisions for the survival and development of enterprises

The Effect of Environmental Regulation on Corporate Environmental Governance Behavior and Its Mechanisms

Environmental regulation is an institutional guarantee for achieving green and sustainable economic development, and the implementation effect of environmental regulation policies is a concern for all sectors of society. This paper empirically examines the impact of environmental regulation on firms’ environmental governance behavior using a double difference model with the help of a quasi-natural experiment, the new Environmental Protection Law, and analyzes the mediating effect of central environmental protection inspectors using data from listed companies in China from 2011 to 2020. It was found that environmental regulation significantly enhances firms’ motivation to participate in environmental governance and central environmental protection inspectors play a mediating role in the impact of environmental regulation on firms’ environmental governance behavior. Furthermore, heterogeneity analysis shows that the enhancement effect of environmental regulation on firms’ environmental governance behavior mainly exists in large-scale firms and nonstate enterprises

The Effect of Environmental Regulation on Corporate Environmental Governance Behavior and Its Mechanisms

Environmental regulation is an institutional guarantee for achieving green and sustainable economic development, and the implementation effect of environmental regulation policies is a concern for all sectors of society. This paper empirically examines the impact of environmental regulation on firms’ environmental governance behavior using a double difference model with the help of a quasi-natural experiment, the new Environmental Protection Law, and analyzes the mediating effect of central environmental protection inspectors using data from listed companies in China from 2011 to 2020. It was found that environmental regulation significantly enhances firms’ motivation to participate in environmental governance and central environmental protection inspectors play a mediating role in the impact of environmental regulation on firms’ environmental governance behavior. Furthermore, heterogeneity analysis shows that the enhancement effect of environmental regulation on firms’ environmental governance behavior mainly exists in large-scale firms and nonstate enterprises

The Microcosmic Mechanism and Empirical Test of Uncertainty on the Non-Linear Fluctuation of Chinese Grain Prices-Based on the Perspective of Global Economic Policy Uncertainty

The dramatic fluctuations in grain prices and the threat to grain security caused by global economic policy uncertainty have been a social concern and a challenging area for price management authorities to regulate. Based on general equilibrium analysis in microeconomics, this paper constructs a mathematical model of the impact of global economic policy uncertainty on grain price fluctuation. It then examines the micro mechanism of non-linear grain price fluctuation under the dominant market mechanism and measures the non-linear shock effect of global economic policy uncertainty on grain prices using a threshold regression model. The results show that soybean and corn prices are subject to a two-zone fluctuation pattern due to global economic policy uncertainty. The impact has significant non-linear characteristics and is significantly greater in the high zone than that in the low zone. Accordingly, this paper offers government departments advice on better regulating and managing the market supply and demand and smoothing out sharp fluctuations in grain prices caused by changes in global economic policies

The Threshold Effect of Swine Epidemics on the Pig Supply in China

The pig industry is the pillar industry of animal husbandry in China, and epidemics can lead to drastic changes in pig supply, affecting the healthy development of the pig industry and residents’ quality of life. This study analyzed the mechanism of the effect of swine epidemics on nonlinear shocks to pig supply, and monthly data on pig supply from January 2012 to June 2020 were applied to study the threshold effect of swine epidemics on pig stock and slaughter in China empirically, using the index of swine epidemics’ width (ISEW) as the threshold variable. The results of this study were as follows: (1) The influence of the ISEW over 7 months on pig stock in China was divided into two ranges, and the pig stock did not change significantly when the ISEW was less than 0.25. Swine epidemics had a significantly negative impact on the pig stock when the ISEW was larger than 0.25. (2) The influence of the ISEW over 8 months on pig slaughter was also divided into two ranges. When the ISEW was less than 0.33, epidemics had a positive and significant effect on pig slaughter, while epidemics had a marked negative impact on pig slaughter when the ISEW was greater than 0.33. Based on these conclusions, this study proposed relevant measures for the prevention and control of swine epidemics

The Microcosmic Mechanism and Empirical Test of Uncertainty on the Non-Linear Fluctuation of Chinese Grain Prices-Based on the Perspective of Global Economic Policy Uncertainty

The dramatic fluctuations in grain prices and the threat to grain security caused by global economic policy uncertainty have been a social concern and a challenging area for price management authorities to regulate. Based on general equilibrium analysis in microeconomics, this paper constructs a mathematical model of the impact of global economic policy uncertainty on grain price fluctuation. It then examines the micro mechanism of non-linear grain price fluctuation under the dominant market mechanism and measures the non-linear shock effect of global economic policy uncertainty on grain prices using a threshold regression model. The results show that soybean and corn prices are subject to a two-zone fluctuation pattern due to global economic policy uncertainty. The impact has significant non-linear characteristics and is significantly greater in the high zone than that in the low zone. Accordingly, this paper offers government departments advice on better regulating and managing the market supply and demand and smoothing out sharp fluctuations in grain prices caused by changes in global economic policies