This paper proposes a high-throughput short reference differential chaos shift keying cooperative communication system with the aid of code index modulation,referred to as CIM-SR-DCSK-CC system.In the proposed CIM-SR-...This paper proposes a high-throughput short reference differential chaos shift keying cooperative communication system with the aid of code index modulation,referred to as CIM-SR-DCSK-CC system.In the proposed CIM-SR-DCSK-CC system,the source transmits information bits to both the relay and destination in the first time slot,while the relay not only forwards the source information bits but also sends new information bits to the destination in the second time slot.To be specific,the relay employs an N-order Walsh code to carry additional log_(2)N information bits,which are superimposed onto the SRDCSK signal carrying the decoded source information bits.Subsequently,the superimposed signal carrying both the source and relay information bits is transmitted to the destination.Moreover,the theoretical bit error rate(BER)expressions of the proposed CIMSR-DCSK-CC system are derived over additive white Gaussian noise(AWGN)and multipath Rayleigh fading channels.Compared with the conventional DCSKCC system and SR-DCSK-CC system,the proposed CIM-SR-DCSK-CC system can significantly improve the throughput without deteriorating any BER performance.As a consequence,the proposed system is very promising for the applications of the 6G-enabled lowpower and high-rate communication.展开更多
The criteria for the construction of an eco agricultural county in China were suggested. The criteria should coordinate social, economic, and environmental effects together. At first, it emphasizes on the social e...The criteria for the construction of an eco agricultural county in China were suggested. The criteria should coordinate social, economic, and environmental effects together. At first, it emphasizes on the social effect input into the system, which includes population control, cultural, scientific, and moral education, technical training and so on. Secondly, economic criteria are mainly those of the increase of gross national product(GNP) and income per capita every year. Finally, the technical criteria consist of not only the grain yield, commodity percentage of the agricultural product, cultivated output/input, animal husbandry production value/total agricultural production value and other agricultural criteria, but also environmental criteria, such as the percentage of forest and grass cover, degenerated land under control, recycling of organic waste, recommended fertilization, integrated pest management, treatment of discharged wastes and others. In an eco agricultural system, the realization of these criteria by three different development steps were recommended too.展开更多
Integrated Agricultural Development Project is an important part of China＇ s fiscal expenditure. Make a reasonable assessment to Integrated projects for agricultural development, not only can to protect the quality o...Integrated Agricultural Development Project is an important part of China＇ s fiscal expenditure. Make a reasonable assessment to Integrated projects for agricultural development, not only can to protect the quality of the project has been implemented, but also has important practical significance for enhancing China＇ s comprehensive agricultural production capacity. In this paper, combined with the present situation of China＇ s comprehensive agricultural development project performance evaluation, proposed the design process of comprehensive agricultural development project performance evaluation system, and analysis of the performance evaluation method selected.展开更多
By means of analogy, this paper analyses the present functional hierarchyframe model for system maintainability, and presents an improved model. Practical applicationindicates that the improved model is visualized, mo...By means of analogy, this paper analyses the present functional hierarchyframe model for system maintainability, and presents an improved model. Practical applicationindicates that the improved model is visualized, more convenient and perfected over the perviousmodels.展开更多
基金supported in part by the NSF of China under Grant 62322106,62071131 and 62171135the Guangdong Basic and Applied Basic Research Foundation under Grant 2022B1515020086+2 种基金the NSF of Guangdong Province under Grant 2019A1515011465the International Collaborative Research Program of Guangdong Science and Technology Department under Grant 2022A0505050070the Industrial R&D Project of Haoyang Electronic Co.,Ltd.under Grant 2022440002001494.
文摘This paper proposes a high-throughput short reference differential chaos shift keying cooperative communication system with the aid of code index modulation,referred to as CIM-SR-DCSK-CC system.In the proposed CIM-SR-DCSK-CC system,the source transmits information bits to both the relay and destination in the first time slot,while the relay not only forwards the source information bits but also sends new information bits to the destination in the second time slot.To be specific,the relay employs an N-order Walsh code to carry additional log_(2)N information bits,which are superimposed onto the SRDCSK signal carrying the decoded source information bits.Subsequently,the superimposed signal carrying both the source and relay information bits is transmitted to the destination.Moreover,the theoretical bit error rate(BER)expressions of the proposed CIMSR-DCSK-CC system are derived over additive white Gaussian noise(AWGN)and multipath Rayleigh fading channels.Compared with the conventional DCSKCC system and SR-DCSK-CC system,the proposed CIM-SR-DCSK-CC system can significantly improve the throughput without deteriorating any BER performance.As a consequence,the proposed system is very promising for the applications of the 6G-enabled lowpower and high-rate communication.
文摘The criteria for the construction of an eco agricultural county in China were suggested. The criteria should coordinate social, economic, and environmental effects together. At first, it emphasizes on the social effect input into the system, which includes population control, cultural, scientific, and moral education, technical training and so on. Secondly, economic criteria are mainly those of the increase of gross national product(GNP) and income per capita every year. Finally, the technical criteria consist of not only the grain yield, commodity percentage of the agricultural product, cultivated output/input, animal husbandry production value/total agricultural production value and other agricultural criteria, but also environmental criteria, such as the percentage of forest and grass cover, degenerated land under control, recycling of organic waste, recommended fertilization, integrated pest management, treatment of discharged wastes and others. In an eco agricultural system, the realization of these criteria by three different development steps were recommended too.
文摘Integrated Agricultural Development Project is an important part of China＇ s fiscal expenditure. Make a reasonable assessment to Integrated projects for agricultural development, not only can to protect the quality of the project has been implemented, but also has important practical significance for enhancing China＇ s comprehensive agricultural production capacity. In this paper, combined with the present situation of China＇ s comprehensive agricultural development project performance evaluation, proposed the design process of comprehensive agricultural development project performance evaluation system, and analysis of the performance evaluation method selected.
文摘By means of analogy, this paper analyses the present functional hierarchyframe model for system maintainability, and presents an improved model. Practical applicationindicates that the improved model is visualized, more convenient and perfected over the perviousmodels.
