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23rd Pacific Basin Nuclear Conference, PBNC 2022

作者： Li, Daheng yu, shuwen Ghani, Ahmed A. Peng, Changhong University of Science and Technology of China Hefei China

ISBN: (纸本)9789811988981

The first wall of the fusion Water Cooled Ceramic Breeder blanket is a multi-channel parallel square channel. Due to the small size of the flow channels, it may be easy to initiate block accidents. In this paper, the commercial computational fluid dynamics software ANSYS FLUENT was used to conduct numerical simulation and research discussion on different blockage aspects such as blockage materials, thickness, shares, and blockage shapes in the middle of a single square channel. By simulating three different blockages shapes in the flow channel, the results show a great influence on the flow field downstream, and the flow resistance is changed, which provides some reference for the following flow distribution problems. Through comparison, it is found that the wall temperature at the blockage's positions is inversely proportional to the thermal conductivity of the material and directly proportional to the thickness. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Accidents

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Hysteresis-Free and Bias-Stable Organic Transistors Fabricated by Dip-Coating with a Vertical-Phase-Separation Structure

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MATERIALS 2024年第7期17卷 1465页

作者： Wang, Bingxi Yin, Xiaowen yu, shuwen Wang, Haibo Jilin Univ Sch Mat Sci & Engn Minist Educ Key Lab Automobile Mat Changchun 130012 Peoples R China Chinese Acad Sci Dalian Inst Chem Phys Div Energy Res Resources Dalian 116023 Peoples R China

The morphology of organic films plays a pivotal role in determining the performance of transistor devices. While the dip-coating technique is capable of producing highly oriented organic films, it often encounters challenges such as limited coverage and the presence of defects in gaps between strips, adversely affecting device performance. In this study, we address these challenges by increasing solution viscosity through the incorporation of a substantial proportion of dielectric polymers, thereby enhancing the participation of additional molecules during the film formation process when pulled up. This method produces continuous and oriented organic films with a notable absence of gaps, significantly improving the carrier mobility of transistor devices by more than twofold. Importantly, the fabricated devices exhibit remarkable reliability, showing no hysteresis even after 200 cycles of measurement. Furthermore, the current and threshold voltages of the devices demonstrate exceptional stability, maintaining steady after 10,000 s of bias measurement. This approach provides a solution for the cost-effective and large-scale production of organic transistors, contributing significantly to the advancement of organic electronics.

关键词： organic transistors viscosity dielectric polymer vertical phase separation carrier mobility device stability

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Recent membrane separation technology for noble gas recovery

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JOURNAL OF MATERIALS CHEMISTRY A 2024年第23期12卷 13605-13622页

作者： yu, shuwen Lin, Rijia Xie, Zixi Chai, Milton Chen, Ruiqi Li, Shichun Shi, Hongwei Zhang, Keying Shi, Zhiqiang Hou, Jingwei Univ Queensland Sch Chem Engn St Lucia Qld 4072 Australia Suzhou Univ Sch Chem & Chem Engn Suzhou 234000 Peoples R China China Acad Engn Phys Inst Chem Mat Mianyang 621900 Peoples R China

Due to their unique properties, noble gases are significant in various disciplines despite their relative scarcity in the Earth's atmosphere. However, capturing and purifying noble gases from gas mixtures remain challenging in gas processing and separation. Cryogenic distillation has been the most common technique for separating gases, including noble gases, from gas mixtures in industrial applications. Although this process effectively achieves high-purity separations, it is highly energy-intensive due to the extreme cooling requirements. Membrane technology is a promising alternative solution for achieving low-cost and energy-efficient separations. It enables industries to improve their sustainability, reduce operating costs, and enhance product quality. Future membrane separation methods for noble gas recovery, including helium (He), neon (Ne), argon (Ar), krypton (Kr), and xenon (Xe), will become a more prominent and sustainable alternative to traditional cryogenic distillation. This review examines the most recent progress in the development of membrane materials designed to separate noble gases over recent years, encompassing polymers, zeolites, metal-organic frameworks (MOFs), porous organic cages (POCs), and 2D nanosheet membranes. This review also highlights that future developments in membrane material design and simulation, coupled with innovative process engineering, can address the existing challenges in this field and unlock the potential of membrane-based noble gas separation technologies. This review summarizes the membrane separation for the recovery of noble gases, which are significant in various disciplines due to their unique properties.

关键词： Inert gases

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面向智能无人通信系统的因果性对抗攻击生成算法

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通信学报 2024年第1期45卷 54-62页

作者：禹树文许威姚嘉铖东南大学移动通信全国重点实验室江苏南京210096 网络通信与安全紫金山实验室江苏南京211111

考虑到基于梯度的对抗攻击生成算法在实际通信系统部署中面临着因果性问题,提出了一种因果性对抗攻击生成算法。利用长短期记忆网络的序列输入输出特征与时序记忆能力,在满足实际应用中存在的因果性约束前提下,有效提取通信信号的时序... 详细信息

考虑到基于梯度的对抗攻击生成算法在实际通信系统部署中面临着因果性问题,提出了一种因果性对抗攻击生成算法。利用长短期记忆网络的序列输入输出特征与时序记忆能力,在满足实际应用中存在的因果性约束前提下,有效提取通信信号的时序相关性,增强针对无人通信系统的对抗攻击性能。仿真结果表明,所提算法在同等条件下的攻击性能优于泛用对抗扰动等现有的因果性对抗攻击生成算法。

关键词：智能通信系统对抗攻击深度学习因果系统长短期记忆网络

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Numerical Study on Flow Distribution Characteristics of Parallel Square Flow Channels Under Blockage 23rd

Numerical Study on Flow Distribution Characteristics of Para...

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23rd Pacific Basin Nuclear Conference, PBNC 2022

作者： Li, Daheng Xu, Xinyan yu, shuwen Xiao, Jun Peng, Changhong School of Nuclear Science and Technology University of Science and Technology of China Hefei China of the People’s Republic of China Beijing China

ISBN: (纸本)9789811988981

In this study, ANSYS FLUENT and RELAP5/MOD3.4 were used to calculate the influence of inlet header size and different blockage objects’ locations on the flow distribution of parallel flow channels and the wall temperature and flow field distribution were compared. The results showed that the inlet header size considerably affected the flow distribution, the blocking position slightly affected the β value, the blocking material’s influence was only local, and it has almost no effect on the non-blocked flow channel and the flow field distribution in the inlet header. The rising trend of the maximum wall temperature calculated using the two methods was the same;however, the temperature calculated using RELAP5 was greater than that calculated using FLUENT. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Parallel flow

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Neonatal Hypoxic-ischemic Encephalopathy Grading from Multi-channel EEG Time-series Data Using a Fully Convolutional Neural Network 19

Neonatal Hypoxic-ischemic Encephalopathy Grading from Multi-...

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19th International Conference on Natural Computation, Fuzzy Systems and Knowledge Discovery, ICNC-FSKD 2023

作者： yu, shuwen Marnane, William P Boylan, Geraldine B. Lightbody, Gordon University College Cork Electrical and Electronic Engineering Ireland Cork University Hospital Infant Research Centre Ireland University College Cork Pediatrics and Child Health Ireland

ISBN: (纸本)9798350304398

A deep learning classifier is proposed for hypoxic-ischemic encephalopathy (HIE) grading in neonates. Rather than using any features, this architecture can be fed with raw EEG. Fully convolutional layers were adopted both in the feature extraction and classification blocks, which makes this architecture simpler, and deeper, but with fewer parameters. Here two large (335h and 338h respectively) multi-center neonatal continuous EEG datasets were used for training and test. The model was trained based on weak labels and channel independence. A majority vote method was used for the post-processing of the classifier results (across time and channels) to increase the robustness of the prediction. The proposed system achieved an accuracy of 86.09% (95% confidence interval: 82.41% ∼ 89.78%), an MCC of 0.7691, and an AUC of 86.23% on the large unseen test set. Two convolutional neural network architectures which utilized time-frequency distribution features were selected as the baseline as they had been developed or tested on the same datasets. A relative improvement of 23.65% in test accuracy was obtained as compared with the best baseline. © 2023 IEEE.

关键词： Grading

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China's Attitude to the Non-Aligned Movement and Its Changes (1992-2021) -- An investigation centered on ＂Reference News＂

International Journal of Social Science and Education Resear...

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International Journal of Social Science and Education Research 2022年第8期5卷 688-694页

作者： Gongmo Liu shuwen yu

As the largest international organization in developing countries, the Non‐Aligned Movement has played an important role in the international arena since its establishment, and has voiced its voice against hegemony and the pursuit of justice. After the end of the Cold War, the Non‐Aligned Movement adhered to the purposes and principles of independence, independence and non‐group, and emphasized the economic development of the southern countries and the promotion of a fair and reasonable international order. my country became an observer state of the Non‐Aligned Movement in 1992, and the two sides established official contacts. By referring to the literal translation, reprinted foreign newspapers and foreign telegrams, we can get a glimpse of the changes in our country's attitude towards the Non‐Aligned Movement in different periods after the end of the Cold War.

关键词： Post‐Cold War China non‐aligned movement reference news

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Silence of Aminopeptidase N 2 gene reveals the trade-offs for acquiring Cry1Ac resistance in Plutella xylostella

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ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY 2024年第3期116卷 e22131页

作者： Lv, Zhuohong yu, shuwen Zhao, Yafei Yang, Zhongxia Hunan Agr Univ Coll Plant Protect Hunan Prov Key Lab Biol & Control Plant Dis & Inse Changsha 410128 Peoples R China Yuelushan Lab Changsha Peoples R China

Bacillus thuringiensis (Bt) is widely used as a biopesticide worldwide. To date, at least eight pest species have been found to be resistant to Bt in the field. As the first pest that was reported having resistance to Bt in the field, considerable research has been done on the mechanisms of Bt resistance in Plutella xylostella. However, whether the acquisition of Bt resistance by P. xylostella comes at a fitness cost is also a valuable question. In this study, Aminopeptidase-N 2 (APN2), a Cry toxin receptor gene of P. xylostella, was knocked down by RNA interference, resulting in improved resistance to Cry1Ac. It was also found that larval mortality of APN2 knockdown P. xylostella was significantly higher than that of the control, while the pupation rate, pupal weight, eclosion rate, fecundity (egg/female), hatchability, and female adult longevity were significantly lower in APN2 knockdown P. xylostella than in the control. These results illustrate that if Cry1Ac resistance was obtained only through the reduction of APN2 expression, P. xylostella would need to incur some fitness costs for it.

关键词： Aminopeptidase-N 2 gene Cry1Ac resistance fitness cost Plutella xylostella RNA interference

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Rapid analysis of packed pebble beds for thermal-hydraulic characteristics via reduced order models

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CHEMICAL ENGINEERING SCIENCE 2023年第1期280卷

作者： yu, shuwen Zhang, Zhenze Peng, Changhong Bai, Tianze Univ Sci & Technol China Sch Nucl Sci & Technol 96 Jinzhai Rd Hefei 230026 Peoples R China

In recent years, the pebble bed module has garnered increased attention due to its inherent safety and versatile applications, particularly in the form of High-Temperature Gas-Cooled reactors and fusion tritium breeding blankets. Understanding the thermal-hydraulic characteristics within the pebble bed is crucial for the safety evaluation and design of such reactors. To study pore flow in the pebble bed, discrete element coupling methods and computational fluid dynamics (DEM-CFD) are commonly employed. However, simulating thousands of pebbles can be computationally intensive and time-consuming. To address this, reduced order models (ROMs) have been developed to reduce the computational complexity by employing simplified systems instead of the original complex system, thereby significantly saving computational time while maintaining accuracy. In this work, ROMs have been established for body-centered cubic packing, face-centered cubic packing, and randomly packed beds of pebbles. Using the ROM results, subsequent analysis focused on two important thermal-hydraulic characteristics: pressure and effective thermal conductivity. A comparison was made between the results ob-tained from the full-order model (FOM) using CFD and the reconstructed ROM results. The case studies demonstrate the potential of the proposed approach in rapidly and accurately investigating significant flow and heat transfer features, such as pressure and temperature.

关键词： Pebble bed Reduced order model DEM-CFD Effective thermal effective Helium

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Development of one-class classification method for identifying healthy *** from those contaminated with uncertain heavy metals by LIBS

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International Journal of Agricultural and Biological Engineering 2023年第4期16卷 200-205页

作者： Zhonghao Xie Xi’an Feng Xiao Chen Guangzao Huang Xiaojing Chen Limin Li Wen Shi Chengxi Jiang shuwen yu School of Marine Science and Technology Northwestern Polytechnical UniversityXi’an 710072China Wenzhou Institute of Industry&Science Wenzhou 325035ZhejiangChina College of Electrical and Electronic Engineering Wenzhou UniversityWenzhou 325035ZhejiangChina Information Technology Center Wenzhou UniversityWenzhou 325035ZhejiangChina

Laser-induced breakdown spectroscopy(LIBS)can be used for the rapid detection of heavy metal contamination of Tegillarca granosa(***),but an appropriate classification model needs to be *** the one-class classification method,only target samples are needed in training process to achieve the recognition of abnormal samples,which is suitable for rapid identification of healthy *** from those contaminated with uncertain heavy *** construction of a one-class classification model for heavy metal detection in *** by LIBS has faced the problem of high-dimension and small *** solve this problem,a novel one-class classification method was proposed in this ***,the principal component scores and the intensity of the residual spectrum were combined as extracted ***,a one-class classifier based on Mahalanobis distance using the extracted features was constructed and its threshold was set by leave-one-out *** sensitivity,specificity and accuracy of the proposed method were reached to 1,0.9333 and 0.9667 respectively,which are superior to the previously reported methods.

关键词： laser-induced breakdown spectroscopy Heavy metal contamination Tegillarca granosa one-class classification

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