المؤلفون: Yanjie Wang, Donglin Liu, Xudong Zhang, Mingzhi Zhang, Shenglei Li, Xiaoyan Feng, Meng Dong, Shanshan Ma, Siyu Qian, Zeyuan Wang, Yue Zhang, Pengyuan Wang, Shuhao Mei, Qingjiang Chen

المصدر: Cancer Medicine, Vol 12, Iss 18, Pp 18568-18577 (2023)

مصطلحات موضوعية: diffuse large B‐cell lymphoma, bulky mass, immunohistochemistry, lymphoma, MYC, radiotherapy, Neoplasms. Tumors. Oncology. Including cancer and carcinogens, RC254-282

الوصف: Abstract Purpose The prognostic factors for diffuse large B‐cell lymphoma (DLBCL) have been fully explored, but prognostic information for bulky mass DLBCL patients is limited. This study aimed to analyze the prognostic value of MYC protein expression and other biological parameters in bulky mass DLBCL patients. Methods We defined a bulky mass as a maximum tumor diameter ≥7.5 cm and studied 227 patients with de novo bulky mass DLBCL. Results In all patients with bulky mass DLBCL, the 1‐year and 3‐year OS rates were 72.7% and 57.1%, respectively, and the 1‐year and 3‐year PFS rates were 52.0% and 42.5%, respectively. The MYC overexpression group (n = 140) showed significantly worse overall survival (OS; p = 0.019) and progression‐free survival (PFS; p = 0.001) than the non‐MYC overexpression group (n = 87). Subgroup analyses demonstrated that the MYC overexpression group was associated with inferior OS and PFS in the subgroups with the International Prognostic Index score of 3–5 (OS: p = 0.011; PFS: p

وصف الملف: electronic resource

Relation: https://doaj.org/toc/2045-7634

URL الوصول: https://doaj.org/article/ebe22fde74ef450995b6d593634d26e4

المؤلفون: Donglin Liu, Samrah Jamshaid, Lijuan Wang

المصدر: Brain Sciences, Vol 14, Iss 6, p 606 (2024)

مصطلحات موضوعية: neural mechanism, inhibition, misconceptions, scientific reasoning, fNIRS, Neurosciences. Biological psychiatry. Neuropsychiatry, RC321-571

الوصف: This study examines the impact of response and semantic inhibition on scientific reasoning using fNIRS data from 30 students (15 male, 15 female). Utilizing Go/Nogo and Stroop-like tasks within a modified speeded-reasoning task, it was found that inhibition significantly influences scientific reasoning. Specifically, slower responses and lower accuracy on incongruent statements were linked to increased activity in bilateral dorsolateral prefrontal cortex (DLPFC) and pre-supplementary motor area (pre-SMA). The research shows that both DLPFC and pre-SMA are associated with overcoming misconceptions in scientific reasoning. The findings suggest that understanding inhibitory mechanisms can enhance educational strategies to improve critical thinking and scientific literacy.

وصف الملف: electronic resource

Relation: https://www.mdpi.com/2076-3425/14/6/606; https://doaj.org/toc/2076-3425

URL الوصول: https://doaj.org/article/10e3a0b12ca842809d9dc2c8df4da90a

المؤلفون: Hui LONG, Shengtao LI, Jianqiang MU, Donglin LIU, Dongdong YUE, Guoyu YAN

المصدر: Shuiwen dizhi gongcheng dizhi, Vol 50, Iss 4, Pp 14-25 (2023)

مصطلحات موضوعية: sedimentary basin, deep buried karst geothermal reservoir, seismic exploration, data acquisition, parameters optimization, Geology, QE1-996.5

الوصف: Deep heterogeneous carbonate reservoirs have become more and more important in the deep exploration of geothermal resources in China. The essential seismic exploration technology has many difficulties, such as serious attenuation of deep energy, low signal-to-noise ratio, difficult imaging of inner basement in tectonic uplift areas. In order to acquire high-quality deep seismic exploration data, a large number of vibroseis excitation parameters and geophone receiving parameters experiments have been received in a typical areas of the Central Hebei Plain in North China. On the basis of a large number of field experimental data, a qualitative analysis of the original single-shot records is carried out, and quantitative analysis is also carried out from the aspects of frequency band energy, inter-channel frequency, signal-to-noise ratio, etc., to study the parameter selection such as the number of vibroseis, sweep frequency, sweep length, vibration times, driving amplitude and geophone combination mode, which can affect the quality of the seismic data. In this paper, the field construction parameters for 2D seismic exploration of deep carbonate reservoirs in the North China Plain are optimized as follows: 4 sets of 28 tons vibrate 4–6 times, 75% driving amplitude, non-linear sweep (slope –3), 6–84 Hz sweep frequency, and 12 s sweep length. The quality of the single-shot records and data processing profiles are greatly improved after parameter optimization, which can be more clearly divided into the bottom interface of the Gaoyuzhuang Formation of the Jixian System and the top interface of the Archean Erathern in the Niutuozhen uplift tectonic area. The optimized seismic acquisition parameters are of certain reference and guiding significance for deep seismic exploration in sedimentary basins.

وصف الملف: electronic resource

Relation: https://doaj.org/toc/1000-3665

URL الوصول: https://doaj.org/article/1b184e1569954c6a9ef135cad0a8f84d

المؤلفون: Dongguang WEN, Eryong ZHANG, Guiling WANG, Linyou ZHANG, Huang WANG, Senqi ZHANG, Chengming YE, Wenshi WANG, Xianpeng JIN, Donglin LIU, Xiaofeng JIA, Shengtao LI, Haidong WU, Sheng LIAN, Qingda FENG

المصدر: Shuiwen dizhi gongcheng dizhi, Vol 50, Iss 4, Pp 1-13 (2023)

مصطلحات موضوعية: hot dry rock, exploration and development, progress, prospects, Geology, QE1-996.5

الوصف: The exploitation and utilization of clean energy is a resource and environmental issue of common concern for global sustainable development. As a vital strategic and sustainable future energy, hot dry rock (HDR) has attracted more and more attention. In this paper some thoughts on the future research direction of HDR resources in China are provided based on a worldwide experience summary, hoping to provide a useful reference for the future exploration and engineering development of HDR. Since the concept of HDR was put forward in the 1970s, the number of worldwide HDR construction has been increasingly growing. Although a lot of theoretical and technical breakthroughs have been made, only a small fraction of projects still in operation due to the lack of sustained financial support, induced microearthquakes and other issues. At present, the global development of HDR is gradually entering a new stage of exploration, and the basic theories of HDR to tackle the key problems are strengthening around the world. Since 2012, the China Geological Survey has organized and implemented the nationwide terrestrial HDR resources survey, evaluation, exploration and development, and significant stage progress has been achieved. A series of fundamental maps have been compiled, such as terrestrial heat flow value, curie surface depth, distribution of acidic rock, and heat-controlling structure in China. The resource potential of terrestrial HDR in China has been preliminarily estimated and a sounding basis for the target site selection is provided. HDR exploration and evaluation have been carried out in typical areas of Qinghai, Shandong, Hebei, Shanxi and Jiangsu provinces, and a breakthrough has been achieved in the Gonghe Basin of Qinghai. The first HDR resources exploration and production demonstration project in China was carried out in 2019, which made a series of meaningful outcomes in deep HDR exploration, high-temperature hard rock drilling, large-scale reservoir stimulation, reservoir connectivity and flow circulation, organic Rankine cycle (ORC) power generation, etc. The large-scale reservoir stimulation was carried out in 2020, and the first power generation test was completed in 2021. In general, the global exploration and development of HDR has made great progress. Practice has proved that HDR resources are a promising green energy and are expected to become an inexhaustible energy support for the world in the future. However, there is still a large gap between the existing path of HDR development and utilization and the economics of its supporting technologies compared with commercial development expectations at present. Although the development of HDR resources in China has achieved a breakthrough from “0” to “1”, there is still a long way to go from the international level. In order to solve the problems of large-scale and economic development, it is still needed to promote disruptive technological innovation in high temperature hard rock drilling and completion, fine characterization of deep reservoirs, safe large-scale reservoir construction, efficient heat transfer and heat recovery and other aspects.

وصف الملف: electronic resource

Relation: https://doaj.org/toc/1000-3665

URL الوصول: https://doaj.org/article/6520e7153cfd4f40bb59dcad8c6e5504

المؤلفون: Dawei Liu, Donglin Liu, Bin Wang, Pan Zheng

المصدر: IET Image Processing, Vol 17, Iss 8, Pp 2516-2536 (2023)

مصطلحات موضوعية: data protection, image processing, image watermarking, Photography, TR1-1050, Computer software, QA76.75-76.765

الوصف: Abstract The internet and related technologies have promoted the development of medical and health fields, especially remote diagnosis. As medical images may be stolen in the transmission process, the patient's personal information could be leaked. Aiming at the problem of privacy disclosure of colour medical images, a hybrid domain watermarking scheme based on improved differential evolution (DE) and the singular value block embedding (SVBE) is proposed in this study. Through this scheme, the image containing the patient's information is hidden in the patient's medical carrier image as a watermark. First, redistributed invariant lifting wavelet transform (RILWT), discrete wavelet transform (DWT), and singular value decomposition (SVD) are used to process the colour medical carrier image, and the high‐frequency information in the integer wavelet domain of the watermark is embedded into the processed carrier image using the proposed singular value block embedding method based on the improved differential evolution algorithm. At the same time, to increase the security of the watermark scheme, a digital signature based on the SHA‐384 hash function is designed for verification before watermark extraction. Compared with recent related research, the scheme has strong invisibility and robustness.

وصف الملف: electronic resource

Relation: https://doaj.org/toc/1751-9659; https://doaj.org/toc/1751-9667

URL الوصول: https://doaj.org/article/ae62404ac5184277a9cee4f4410816cb

المؤلفون: Zhengchang Liu, Pu Peng, Xiao He, Zhibo Dang, Yuchen Dai, Yuxiang Chen, Xinyuan Shao, Yu Li, Yijing Huang, Donglin Liu, Guangyi Tao, Yunhao Zhang, Zheyu Fang

المصدر: Advanced Physics Research, Vol 2, Iss 6, Pp n/a-n/a (2023)

مصطلحات موضوعية: deep neural networks, metallic nanostructures, multiplexing metalens, Physics, QC1-999

الوصف: Abstract As planar optical elements, metasurfaces confer an unprecedented potential to manipulate light, which benefits from the deep control of the interactions between nanostructures and light. In the past decade, considerable progress has been made in various metasurfaces for on‐demand functions, drawing great interest from the scientific community. However, it is a great challenge to integrate different functions into a single metasurface, due to the incapability of manipulating light at different dimensions and the lack of universal intelligent design strategy. Here, an intelligent design platform based on deep neural networks is proposed, which can map between structure parameters and optical response. The well‐trained network model can intelligently retrieve nanostructures to meet multidimensional optical requirements of metasurfaces. Four metalenses for chiral focusing are realized by the design platform and the simulation results are highly consistent with the design target. In addition, metalenses based on arbitrary polarization at various working wavelength are also demonstrated, showing that the method has powerful design ability. Various optical properties of nanostructures, such as phase shift and polarization, are manipulated by deep neural networks, which can greatly promote the development of multifunctional devices and further pave the way for optical display, communication, computing, sensing, and other applications.

وصف الملف: electronic resource

Relation: https://doaj.org/toc/2751-1200

URL الوصول: https://doaj.org/article/7f8c47e24d0541d0994360ba48fbd078

المؤلفون: Pengfei Qi, Yuchen Dai, Yang Luo, Guangyi Tao, Liheng Zheng, Donglin Liu, Tianhao Zhang, Jiadong Zhou, Bo Shen, Feng Lin, Zheng Liu, Zheyu Fang

المصدر: Light: Science & Applications, Vol 11, Iss 1, Pp 1-12 (2022)

مصطلحات موضوعية: Applied optics. Photonics, TA1501-1820, Optics. Light, QC350-467

الوصف: Based on locally enhanced electromagnetic field and accelerated spontaneous emission rate, excitonic upconversion enhancement of more than 1000-fold was achieved in plasmonic nanocavity coupled transition metal dichalcogenide monolayers.

وصف الملف: electronic resource

Relation: https://doaj.org/toc/2047-7538

URL الوصول: https://doaj.org/article/354683b706c84ff6815d922c51916f36

المؤلفون: Xiao He, Donglin Liu, Hongfei Wang, Liheng Zheng, Bo Xu, Biye Xie, Meiling Jiang, Zhixin Liu, Jin Zhang, Minghui Lu, Zheyu Fang

المصدر: Opto-Electronic Advances, Vol 5, Iss 4, Pp 1-9 (2022)

مصطلحات موضوعية: photonic topological insulator, edge state, cathodoluminescence, tmdc, Optics. Light, QC350-467

الوصف: Photonic topological insulators with robust boundary states can enable great applications for optical communication and quantum emission, such as unidirectional waveguide and single-mode laser. However, because of the diffraction limit of light, the physical insight of topological resonance remains unexplored in detail, like the dark line that exists with the crystalline symmetry-protected topological edge state. Here, we experimentally observe the dark line of the Z2 photonic topological insulator in the visible range by photoluminescence and specify its location by cathodoluminescence characterization, and elucidate its mechanism with the p-d orbital electromagnetic field distribution which calculated by numerical simulation. Our investigation provides a deeper understanding of Z2 topological edge states and may have great significance to the design of future on-chip topological devices.

وصف الملف: electronic resource

Relation: https://doaj.org/toc/2096-4579

URL الوصول: https://doaj.org/article/cbd0671762de423aad7375abd04282d7

المؤلفون: Fan Lei, Yan Xue, Donglin Liu

المصدر: AIP Advances, Vol 12, Iss 8, Pp 085015-085015-25 (2022)

مصطلحات موضوعية: Physics, QC1-999

الوصف: A microwave plasma generator (MPG) of a sub-millimeter scale might be suitable for biomedical applications. However, there are still many unknowns regarding the MPG discharge behavior at this scale and specific conditions. A two-dimensional MPG model at the millimeter scale and its simulation and relative calculation in the COMSOL Multiphysics software are presented. A MPG filled with argon and helium is simulated, respectively. The frequency of a microwave source of about 5 GHz is considered. The number density and temperature of electrons as well as chemical composition are obtained at different power and pressure conditions. The electron density peaks slightly downstream of the crossing point, and the electron density is slightly asymmetrically in the y-plane due to the fact that the electromagnetic waves are absorbed asymmetrically. The electron temperature is relatively low everywhere, in part, due to the high operating pressure. The electron temperature peaks directly underneath the wave guide where the wave is absorbed. The electron density increases with the increase in the internal pressure and the input power of the MPG, the electron temperature decreases with the increase in the internal pressure of the MPG, but the electron temperature cannot be affected by the input power change of MPG. The amount of excited Ar+ and Ars (metastable atom) increases with the increase in the input power and pressure of MPG, but the amount of excited Ar almost remained unchanged. In addition, the amount of excited He almost remained unchanged, while the amount of excited He+, Hes (metastable atom), and He2+ increased with the increase in the input power and pressure of MPG. The simulation results of this model are thus informative for understanding the physical characteristics of millimeter-sized MPG, and it will provide a solid basis for the future development of such hardware in small plasma capsules for cancer therapy.

وصف الملف: electronic resource

Relation: https://doaj.org/toc/2158-3226

URL الوصول: https://doaj.org/article/faf75d62475e468fb928446f75f577f5

المؤلفون: Liheng Zheng, Zhixin Liu, Donglin Liu, Xingguo Wang, Yu Li, Meiling Jiang, Feng Lin, Han Zhang, Bo Shen, Xing Zhu, Yongji Gong, Zheyu Fang

المصدر: Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)

مصطلحات موضوعية: Science

الوصف: Here, the authors generate near-field circularly polarized dipole modes in a hBN/WSe2/hBN–Au nanoantenna hybrid structure by electron beam excitation, and show nanoscale control of the valley polarization through spatial variation of the electron beam excitation position.

وصف الملف: electronic resource

Relation: https://doaj.org/toc/2041-1723

URL الوصول: https://doaj.org/article/3009039c1db644038ff093e7f6e95c35