Modern Science Education in China

Abstract

Symbiotic radio (SR) has emerged as a spectrum-and energy-efficient paradigm to support massive Internet of Things (IoT) connections. Two multiple access schemes are proposed in this paper to facilitate the massive IoT connections using the cellular network based on the SR technique, namely, the simultaneous access (SA) scheme and the selection diversity access (SDA) scheme. In the SA scheme, the base station (BS) transmits information to the receiver while multiple IoT devices transmit their information simultaneously by passively backscattering the BS signal to the receiver, while in the SDA scheme, only the IoT device with the strongest backscatter link transmits information to the receiver.In both of the schemes, the receiver jointly decodes the information from the BS and the IoT devices.To evaluate the above two schemes, in this paper, we have derived the closed-form expressions of the ergodic rates and the outage probabilities for the cellular and IoT transmissions. Finally, numerical results are provided to verify the theoretical analysis and compare the two proposed multiple access schemes. When the number of IoT devices is small, the SDA scheme is more appealing since it can significantly reduce the computational complexity while achieving equivalent performance to the SA scheme. When the number of IoT devices is large, the SA scheme is preferable since it guarantees a significantly better rate performance and a lower outage probability.

Human‐associated genetic landscape of walnuts in the Himalaya: implications for conservation and utilization

“…Human activity in the Himalayan region can be traced back thousands of years. For example, Chinese archaeologists have proposed that the Di‐Qiang people, or Proto–Tibeto–Burman populations, inhabited the Tibetan Plateau during the Yang‐Shao epoch (about 8000 years ago) and brought agriculture to the Himalayan region (Qi et al., 2013; Wang, 1994). Other recent evidence suggests that modern humans occupied the higher altitudes of the Tibetan Plateau and Himalaya at least 3000 years before the present (Chen et al., 2015; Liu, Witonsky, et al., 2022; Zhang et al., 2022).…”

“…In our study, we detected frequent bi-directional hybridization and gene flow between J. regia and J. sigillata in the Himalaya (Figures 2-4), and the two hybrid types were detected in 35 of the 65 populations (Table S6; Figures 2 and 6). (Qi et al, 2013;Wang, 1994). Other…”

The development and challenges of public health nursing education in China from 1912 to 1949: A historical study

“…In addition, uniform requirements were stipulated for public health nursing courses at the policy level. In 1930, the NAC advocated that nursing schools should offer public health courses (Kong, 1930) (Hu, 1937;Wang, 2000), respectively. Then, local health institutions in China also started training PHNs, albeit in smaller numbers.…”

“…Hitherto, scholarly research on public health nursing education in the Republican period has focused on describing the history of its development and curriculum (Wang, 2000;Wu & Jiang, 2022), discussing the importance of training PHNs (Xu, 2022) (in 1935) and Turkey (in 2011) have faced similar difficulties regarding the lack of public health nursing faculty and suitable practice sites (Kadioglu et al, 2013;Nieh, 1935). In addition, an exploration of…”

Neural Correlation of Relation Information——Evidence from ERP

“…Theoretically, the grammatical structure de nes the grammatical relation between morphemes. Although it does not explain their thematic relation, the grammatical structure is the basis for establishing a semantic relation between the two morphemes (Wang, 2014). In other words, the recognition of grammatical structures must precede the more subtle semantic relations.…”