Analysis and Research of 2DPSK Signal Reception Based on Stochastic Resonance System under Levy Noise

Under the background of Levy noise, a new method for coherent demodulation of 2DPSK signal based on the bistable stochastic resonance system model is proposed to solve the problem of poor quality of 2DPSK signal coherent demodulation. Comparing the output signals of the bistable stochastic resonance system model and the traditional model after passing through various components, the analysis shows that the frequency spectrum amplitude of the carrier signal after passing through the bistable stochastic resonance system model is approximately higher than that of the traditional model. 1.26 times. The error code of the output signal after demodulation by the new method is less than that of the traditional model after demodulation, and the signal to noise ratio is improved by 12.5dB. The simulation experiment results prove that the bistable stochastic resonance nonlinear coherent demodulation method effectively improves the transmission quality of 2DPSK signals

A Probe Into the Sustainable Development of Petty Loan Companies

The petty loan companies in China have been in good performance since taken the pilot demonstration, which effectively relieves the rural funds and financing difficulties of SMEs. However, the petty loan companies in the business development also face many problems, such as the unreasonable legal status, the limited sources of funding, the heavy tax burden, high cost, and operational risks, and so on. These issues will be restricted to the sustainable development of petty loan companies. This thesis is in-depth analysis of the problems of petty loan companies in terms of sustainable development, and puts forward suggestions to promote the sustainable development of petty loan companies

International Scientific Cooperation in the Arctic among the BRICS Countries

This article summarises the characteristics of the current platform for BRICS scientific research and cooperation in the Arctic. The BRICS countries’ activities for the development of the Arctic region are analysed. The Arctic cooperation platform is explored through an analysis of official documents, a review of ongoing official events. The BRICS countries are implementing relevant joint projects to develop and explore the Arctic, on the one hand realising their own needs, and on the other using the specific advantages of their economic systems. From time to time, they organise and hold multilateral meetings and conferences. However, most cooperation takes place in a bilateral format. It is based on the organisation of conferences, cooperation between research institutes and joint training. This helps the BRICS countries to expand their influence in the Arctic. Based on an analysis of the identified materials, including projects developed to date but not yet implemented, the author seeks to summarise the main characteristics and features of BRICS Arctic cooperation and to identify its strengths and weaknesses. The conclusions of the paper present relevant proposals for improving the effectiveness of the BRICS countries’ joint work on the Arctic agenda in the medium term

Biochar Adsorption Treatment for Typical Pollutants Removal in Livestock Wastewater: A Review

Biochar, as an high efficiency, environmental friendly, and low-cost adsorbent, is usually used as soil conditioner, bio-fuel, and carbon sequestration regent. Recently, biochar has attracted much attention in wastewater treatment field. There are plenty of studies about application of biochar to adsorb pollutants in wastewater, because of its low-cost preparation, high surface area, large pore volume, plentiful functional groups, and environmental stability. Furthermore, it can be reused due to their high treatment efficiency and resource recovery potential. As biochar can be used for adsorption of typical pollutants in livestock wastewater, it becomes a promising method to treat livestock wastewater. The preparation methods, including pyrolysis, hydrothermal carbonization, and gasification, were introduced. The applications of biochar to adsorb typical pollutants, such as organic pollutants, heavy metals, and nutrients, in livestock wastewater were present. The organic structures, surface functional groups, surface electricity, and mineral component of biochar were investigated to explain the adsorption mechanism of organic pollutants, heavy metals, and nutrients in wastewater. Finally, outlooks were made for the better use of biochar in future. The relationship of preparation parameters, structures, and adsorption performance of biochar should be discussed. The quantitative analysis for the adsorption of organic structures, surface functional groups, surface electricity, and mineral component should be performed. The disposal of post-sorption biochar should be investigated

Development of Antarctic Scientific Research and International Scientific Cooperation of China

The purpose of this article is to summarise the current attitude of the Chinese government to Antarctic scientifc research and to characterise Antarctic scientifc research carried out by China as a non-Antarctic country by reviewing the performance of Antarctic scientifc expeditions and scientifc research in China over the last forty years.The author approaches the study from the perspective of three aspects. Firstly, there is a reviewof Chinese government documents of recent years on China’s activities in Antarctica. Particular attention is paid to scientifc research and the Chinese government’s attitude to China’s research activities in Antarctica. Secondly, the history of the development of Chinese scientifc research in the Antarctic is considered. The path traveled by China is described, from sending the frst expeditionary group to Antarctica to the creation of research institutes, higher educational institutions and participation in international cooperation and scientifc programs. Finally, the characterization of the frst two aspects allows the author to analyze the achievements, shortcomings and peculiarities of China’s research activities and international cooperation in Antarctica. The author suggests the relevance of scientifc cooperation and development of research activities in this region from the point of view of China’s strategic interests.The review of ofcial documents made public by the Chinese government in recent years allows the author to use the method of historical analysis to systematically summarize the country’s research activities in Antarctica and study the history of scientifc research. The paper also applies such methods of scientifc research as comparative analysis and statistical analysis

Polysaccharides isolated from Morinda officinalis How roots inhibits cyclophosphamide-induced leukopenia in mice

Purpose: To investigate the optimum parameters for extracting polysaccharides from Morinda officinalis How (MOP), and explore their inhibitory effects on leukopenia in mice.Methods: Orthogonal design was performed to investigate the optimum parameters for extracting MOP. A leukopenia mouse model was established by injection of cyclophosphamide (CTX) for three days. Thereafter, MOP (100, 200 and 400 mg/kg) was administered orally for 10 days. Furthermore, blood cells (leukocytes, neutrophil, lymphocyte and mononuclear cell) were analyzed, while serum IL-3 and IL- 6 were determined by ELISA. The thymus and spleen of the mice were separated and weighed to determine viscera indices.Results: Orthogonal design showed that the influence order of the four factors was extraction times (C) > ratio of water to raw material (RWM, D) > extraction time (B) > extraction temperature (A). The optimum extraction parameters for MOP were: extraction temperature (80 °C), extraction duration (2 h), no. of extractions (3), and ratio of water to raw material (30 mL/g). Furthermore, the results indicate that MOP (100, 200 and 400 mg/kg) elevated the levels of leukocyte (p < 0.01), neutrophil (p < 0.01), lymphocyte (p < 0.01) and mononuclear cell (p < 0.01) in leukopenia mice. Besides, MOP (100, 200 and 400 mg/kg) also increased thymus (p < 0.01) and spleen (p < 0.05) indices and serum levels of IL-3 (p < 0.05) and IL-6 (p < 0.01).Conclusion: Orthogonal design is a good strategy for optimizing extraction parameters of MOP. Furthermore, MOP stimulated synthesis of leukocytes in CTX-induced leukopenia in mice. Thus, MOP is a potential adjunct for the treatment of tumors/cancers.Keywords: Morinda officinalis, Polyscacharide, Orthogonal design, Leukopenia, Thymus index, Spleen inde

Metamaterial absorber integrated microfluidic terahertz sensors

Spatial overlap between the electromagnetic fields and the analytes is a key factor for strong light-matter interaction leading to high sensitivity for label-free refractive index sensing. Usually, the overlap and therefore the sensitivity are limited by either the localized near field of plasmonic antennas or the decayed resonant mode outside the cavity applied to monitor the refractive index variation. In this paper, by constructing a metal microstructure array-dielectric-metal (MDM) structure, a novel metamaterial absorber integrated microfluidic (MAIM) sensor is proposed and demonstrated in terahertz (THz) range, where the dielectric layer of the MDM structure is hollow and acts as the microfluidic channel. Tuning the electromagnetic parameters of metamaterial absorber, greatly confined electromagnetic fields can be obtained in the channel resulting in significantly enhanced interaction between the analytes and the THz wave. A high sensitivity of 3.5 THz/RIU is predicted. The experimental results of devices working around 1 THz agree with the simulation ones well. The proposed idea to integrate metamaterial and microfluid with a large light-matter interaction can be extended to other frequency regions and has promising applications in matter detection and biosensing

Comparative Metabolomics of Early Development of the Parasitic Plants Phelipanche aegyptiaca and Triphysaria versicolor.

Parasitic weeds of the family Orobanchaceae attach to the roots of host plants via haustoria capable of drawing nutrients from host vascular tissue. The connection of the haustorium to the host marks a shift in parasite metabolism from autotrophy to at least partial heterotrophy, depending on the level of parasite dependence. Species within the family Orobanchaceae span the spectrum of host nutrient dependency, yet the diversity of parasitic plant metabolism remains poorly understood, particularly during the key metabolic shift surrounding haustorial attachment. Comparative profiling of major metabolites in the obligate holoparasite Phelipanche aegyptiaca and the facultative hemiparasite Triphysaria versicolor before and after attachment to the hosts revealed several metabolic shifts implicating remodeling of energy and amino acid metabolism. After attachment, both parasites showed metabolite profiles that were different from their respective hosts. In P. aegyptiaca, prominent changes in metabolite profiles were also associated with transitioning between different tissue types before and after attachment, with aspartate levels increasing significantly after the attachment. Based on the results from 15N labeling experiments, asparagine and/or aspartate-rich proteins were enriched in host-derived nitrogen in T. versicolor. These results point to the importance of aspartate and/or asparagine in the early stages of attachment in these plant parasites and provide a rationale for targeting aspartate-family amino acid biosynthesis for disrupting the growth of parasitic weeds

Incremental Transductive Learning Approaches to Schistosomiasis Vector Classification

The key issues pertaining to collection of epidemic disease data for our analysis purposes are that it is a labour intensive, time consuming and expensive process resulting in availability of sparse sample data which we use to develop prediction models. To address this sparse data issue, we present novel Incremental Transductive methods to circumvent the data collection process by applying previously acquired data to provide consistent, confidence-based labelling alternatives to field survey research. We investigated various reasoning approaches for semisupervised machine learning including Bayesian models for labelling data. The results show that using the proposed methods, we can label instances of data with a class of vector density at a high level of confidence. By applying the Liberal and Strict Training Approaches, we provide a labelling and classification alternative to standalone algorithms. The methods in this paper are components in the process of reducing the proliferation of the Schistosomiasis disease and its effects.Comment: 8 pages, 5 figures, Dragon 4 Symposiu