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基于多层级条件风险价值的高渗透可再生能源电力系统低碳运行联合优化

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电网与清洁能源 2024年第2期40卷 37-46页

作者：沈佳程李梦诗季天瑶林镇佳华南理工大学电力学院广东广州510006

在双碳目标下,风电渗透率增加给新型电力系统的安稳运行带来挑战,而条件风险价值法(Conditional Value-at-Risk,CVaR)可对风电的随机风险进行分类量化评估,以用于系统调度运行。根据CVaR提出了改进的多层级条件风险价值法(Multi-layer C... 详细信息

在双碳目标下,风电渗透率增加给新型电力系统的安稳运行带来挑战,而条件风险价值法(Conditional Value-at-Risk,CVaR)可对风电的随机风险进行分类量化评估,以用于系统调度运行。根据CVaR提出了改进的多层级条件风险价值法(Multi-layer Conditional Value-at-Risk,MCVaR),并建立了基于MCVaR的高渗透可再生能源电力系统低碳运行联合优化模型。仿真算例结果表明,MCVaR相较于CVaR能够显著降低系统的弃风与切负荷量,同时系统的极端损失下降了49.45%。所提方法能够在满足系统可控风险约束的前提下,实现运行经济效益与低碳环保收益的综合最优化。

关键词：条件风险价值低碳运行可再生能源备用优化

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环乳晕切口乳腺纤维瘤切除术治疗效果分析

系统医学 2024年第10期9卷 127-129,134页

作者：刘标孙乃志沈加成盐城市第三人民医院普外科江苏盐城224000

目的分析环乳晕切口应用于乳腺纤维瘤切除术中的价值以及对治疗效果的影响。方法选取2022年1月—2023年11月盐城市第三人民医院收治的82例乳腺纤维瘤切除术治疗患者为研究对象,以切口的不同分为对照组(41例,放射状切口)与观察组(41例,... 详细信息

目的分析环乳晕切口应用于乳腺纤维瘤切除术中的价值以及对治疗效果的影响。方法选取2022年1月—2023年11月盐城市第三人民医院收治的82例乳腺纤维瘤切除术治疗患者为研究对象,以切口的不同分为对照组(41例,放射状切口)与观察组(41例,环乳晕切口),比较两组围术期指标、局部感觉功能恢复情况、瘢痕形成情况、并发症发生情况。结果与对照组相比,观察组的手术用时更短、出血更少、疼感更轻、愈合时间与住院时间更短,差异有统计学意义(P均<0.05)。观察组的局部感觉神经功能恢复正常率高于对照组,差异有统计学意义(P<0.05)。观察组术后半年的瘢痕形成评分低于对照组,差异有统计学意义(P<0.05)。观察组的并发症总发生率为7.32%,低于对照组的24.39%,差异有统计学意义(χ^(2)=4.479,P<0.05)。结论在乳腺纤维瘤切除术中做环乳晕切口可确保手术更快、更安全、更有效的进行,可改善术后恢复效果、保证切口美观度、预防多种并发症。

关键词：环乳晕切口乳腺纤维瘤切除术治疗效果

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山地风电场路堑边坡稳定性影响因素分析

中阿科技论坛（中英文） 2024年第11期 93-97页

作者：孟家玮沈嘉铖刘勇赵政湖南三一智慧新能源设计有限公司湖南长沙415000

山地风电场的地势较复杂,地形通常存在较大的落差,大件运输道路施工后通常会形成高度3~15 m不等的路堑边坡,降雨后多发垮塌,进而造成道路堵塞,影响施工进度,易危及施工人员的人身安全。基于此,文章以某山地风电场道路工程为例,采用FLAC3... 详细信息

山地风电场的地势较复杂,地形通常存在较大的落差,大件运输道路施工后通常会形成高度3~15 m不等的路堑边坡,降雨后多发垮塌,进而造成道路堵塞,影响施工进度,易危及施工人员的人身安全。基于此,文章以某山地风电场道路工程为例,采用FLAC3D数值软件对路堑边坡稳定性的影响因子进行了研究,分析了地质条件、放坡坡比、坡高及降雨强度等条件对其稳定性的影响。研究结果表明:(1)降雨强度对于开挖坡比的选择具有重大影响,当降雨强度为大雨历时1 d时,7 m及以下坡高的坡体至少采用1∶0.5的开挖坡比,7 m以上坡高的边坡需将开挖坡比放缓至1∶0.75才能满足稳定性要求;(2)坡面存在岩土分界面的边坡对各个影响因子的敏感系数均高于均匀土质边坡;(3)对于均匀土质边坡,仅考虑坡高、坡比、降雨强度等3个影响因子,这3个影响因子的占比权重分别为44.85%、33.07%、22.08%。

关键词：降雨强度山地风电场路堑边坡稳定性系数数值模拟

A Retrodirective Array Enabled by CMOS Chips for Two-Way Wireless Communication with Automatic Beam Tracking

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Engineering 2024年第6期37卷 196-207页

作者： jiacheng Guo Yizhu shen Guoqing Dong Zhuang Han Sanming Hu State Key Laboratory of Millimeter Waves School of Information Science and EngineeringSoutheast UniversityNanjing 210096China Purple Mountain Laboratories Nanjing 211111China

This article proposes and demonstrates a retrodirective array(RDA)for two-way wireless communication with automatic beam *** proposed RDA is enabled by specifically designed chips made using a domestic complementary metal-oxide semiconductor(CMOS)*** highly integrated CMOS chip includes a receiving(Rx)chain,a transmitting(Tx)chain,and a unique tracking phaselocked loop(PLL)for the crucial conjugated phase recovery in the *** article also proposes a method to reduce the beam pointing error(BPE)in a conventional *** validate the above ideas simply yet without loss of generality,a 2.4 GHz RDA is demonstrated through two-way communication links between the Rx and Tx chains,and an on-chip quadrature coupler is designed to achieve a nonretrodirective signal suppression of 23 *** experimental results demonstrate that the proposed RDA,which incorporates domestically manufactured low-cost 0.18 lm CMOS chips,is capable of automatically tracking beams covering±40with a reduced *** CMOS chip in the RDA has a compact size of 4.62 mm^(2) and a low power consumption of 0.15 *** the best of the authors’knowledge,this is the first research to demonstrate an RDA with a fully customized CMOS chip for wireless communication with automatic beam tracking。

关键词： Automatic beam tracking CMOS Retrodirective array Two-way communication

Bifunctional Two-Dimensional Nanocomposite with Electromagnetic Wave Absorption and Anti-bacterial Performance

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金属学报:英文版 2023年第9期36卷 1559-1571页

作者： jiacheng shen Xinrui Zhang Chunguang Yang Zixuan Lei Shuaizhen Li Lin Ma Dianyu Geng Song Ma Wei Liu Zhidong Zhang shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei230026China

In current electronic information era,the complex application circumstance of 5G devices pursues the exploration of multi-functional electromagnetic wave(EMW)absorbent materials and it has become the crucial focus in industrial development.A two-dimensional(2D)graphite nanosheet decorated by nickel nanocapsules(2D graphite/Ni@C nanocomposite)was fabricated to possess the EMW absorption and the Escherichia coli(***)anti-bacterial performance *** adjusting the filling ratio and injecting nitrogen doping,the value of minimum reflection loss is−36.08 dB and the effective absorption bandwidth reaches to 5.12 GHz(from 11.4 to 16.52 GHz)with the mass ratio of 30 wt%and the absorber thickness of 2 *** 2D nanocomposite simultaneously gets an excellent anti-bacterial function expressing an *** anti-bacterial rate of 92%during 24 h which is significantly correlated to the interaction between the nanostructure of the 2D nanographite and the nickel ion released from Ni@C *** work provides a new approach to develop a promising 2D anti-bacterial EMW absorber.

关键词： Bifunctional electromagnetic wave absorbent material Nickel-based two-dimensional nanocomposite E.coli anti-bacterial performance

Channel-Feedback-Free Transmission for Downlink FD-RAN:A Radio Map Based Complex-Valued Precoding Network Approach

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China Communications 2024年第4期21卷 10-22页

作者： Zhao Jiwei Chen jiacheng Sun Zeyu Shi Yuhang Zhou Haibo Xuemin(Sherman)shen School of Electronic Science and Engineering Nanjing UniversityNanjing 210023China College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310058China Department of Mathematics and Theories Peng Cheng LaboratoryShenzhen 518000China Department of Electrical and Computer Engineering University of WaterlooWaterlooOntarioN2L 3G1Canada

As the demand for high-quality services proliferates,an innovative network architecture,the fully-decoupled RAN(FD-RAN),has emerged for more flexible spectrum resource utilization and lower network ***,with the decoupling of uplink base stations and downlink base stations in FDRAN,the traditional transmission mechanism,which relies on real-time channel feedback,is not suitable as the receiver is not able to feedback accurate and timely channel state information to the *** paper proposes a novel transmission scheme without relying on physical layer channel ***,we design a radio map based complex-valued precoding network(RMCPNet)model,which outputs the base station precoding based on user *** comprises multiple subnets,with each subnet responsible for extracting unique modal features from diverse input ***,the multimodal embeddings derived from these distinct subnets are integrated within the information fusion layer,culminating in a unified *** also develop a specific RMCPNet training algorithm that employs the negative spectral efficiency as the loss *** evaluate the performance of the proposed scheme on the public DeepMIMO dataset and show that RMCPNet can achieve 16%and 76%performance improvements over the conventional real-valued neural network and statistical codebook approach,respectively.

关键词： beamforming complex neural networks deep learning FD-RAN

Effects of moxibustion and acupuncture at Zusanli(ST 36) and Zhongwan(CV 12) on chronic atrophic gastritis in rats

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Journal of Traditional Chinese Medicine 2020年第5期40卷 827-835页

作者： Liu Mi shen jiacheng Liu Caichun Zhong Huan Yang Qing Shu Wenna Ma Mingzhu Dong Jiyang Yang Zongbao Chang Xiaorong She Chang Yu Shu College of Acupuncture&Moxibustion and Tui-na Hunan University of Chinese MedicineChangsha 410208China Liuyang Hospital of Chinese Medicine Liuyang 410300China Department of Traditional Chinese Medicine Department of Electronic ScienceXiamen UniversityXiamen 361005China Department of Electronic Science Fujian Provincial Key Laboratory for Plasma and Magnetic ResonanceXiamen UniversityXiamen 361005China City University of Hong Kong Hong Kong 999077China Changsha Hospital of Traditional Chinese Medicine(Changsha Eighth Hospital) Changsha 410002China Tat Chee Avenue KowloonHong Kong 999077China

OBJECTIVE:To evaluate the effects of moxibustion and acupuncture of Zusanli(ST 36)and Zhongwan(CV 12)acupoints on chronic atrophic gastritis(CAG)in rats,and to study the mechanisms behind their ***:Forty-four male Sprague-Dawley rats were induced with CAG by intragastric administration of 40%ethanol combined with free drinking of N-methyl-N′-nitro-N-nitrosoguanidine and irregular feeding for 12 weeks,followed by daily treatment with moxibustion or acupuncture for 2 *** examination,Western blotting of cytokines[epidermal growth factor(EGF),EGF receptor(EGFR),extracellular signal-regulated kinase(ERK),phosphorylated ERK(p-ERK)],and1 H NMR-based metabolic profiling of gastric tissues were used to measure changes related to CAG modeling and ***:Moxibustion and acupuncture at Zusanli(ST 36)and Zhongwan(CV 12)each relieved CAG-induced abnormalities in histopathology and cytokine expression of ERK and *** moxibustion treatment regulated the expression of EGF and *** that were increased in gastric tissue by CAG induction(alanine,nicotinamide adenine dinucleotide phosphate,uracil DNA glycosylase,lactate,glycerol and adenosine)were restored to normal levels after moxibustion treatment;acupuncture treatment only normalized the levels of adenosine monophosphate and ***:Our findings suggest that moxibustion or acupuncture at Zusanli(ST 36)and Zhongwan(CV 12)can significantly improve the condition of CAG in *** treatments exert their effects on CAG through different mechanisms.

关键词： Gastritis,atrophic Moxibustion Acupuncture Metabolomics Proton magnetic resonance spectroscopy

Recent advances in nickel-based catalysts in eCO_(2)RR for carbon neutrality

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Carbon Energy 2024年第2期6卷 61-91页

作者： Weikang Peng Fengfeng Li Shuyi Kong Chenxi Guo Haotian Wu jiacheng Wang Yi shen Xianguang Meng Mingxi Zhang Hebei Key Laboratory of Inorganic Nonmetallic Materials School of Materials Science and EngineeringNorth China University of Science and TechnologyTangshanHebeiChina Hebei Iron and Steel Laboratory North China University of Science and TechnologyTangshanChina State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghaiChina School of Materials Science and Engineering Taizhou UniversityZhejiangChina

The excessive use of nonrenewable energy has brought about serious greenhouse *** CO_(2) into high-value-added chemicals is undoubtedly the best choice to solve energy *** to the excellent cost-effectiveness and dramatic catalytic performance,nickel-based catalysts have been considered as the most promising candidates for the electrocatalytic CO_(2) reduction reaction(eCO_(2)RR).In this work,the electrocatalytic reduction mechanism of CO_(2) over Ni-based materials is *** strategies to improve the eCO_(2)RR performance are ***,the research on Ni-based materials for syngas generation is briefly ***,the prospects of nickel-based materials in the eCO_(2)RR are provided with the hope of improving transition-metal-based electrocatalysts for eCO_(2)RR in the future.

关键词： carbon energy carbon neutrality CO_(2)reduction electrocatalysis nickel-based materials

Rapid detection of the rice false smut fungus Ustilaginoidea virens by lateral flow strip-based recombinase polymerase amplification assay

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Journal of Integrative Agriculture 2024年第11期23卷 3763-3773页

作者： jiacheng Xi Sanlian Wan Yue Li Yuandi Xu Jing Yang Ting Zhang Jiajia Chen Zhengguang Zhang Danyu shen Haifeng Zhang Sanya Institute of Nanjing Agricultural University/Key Laboratory of Integrated Management of Crop Diseases and Pests of Ministry of Education Department of Plant Pathology College of Plant Protection Nanjing Agricultural University Sanya Extension Service Center for Agricultural Technology College of Landscape Architecture Jiangsu Vocational College of Agriculture and Forestry

Rice false smut, caused by Ustilaginoidea virens, is a devastating disease that greatly reduces rice yield and ***, controlling rice false smut disease is challenging due to the unique infection mode of U. virens. Therefore,there is a need for early diagnosis and monitoring techniques to prevent the spread of this disease. Lateral flow strip-based recombinase polymerase amplification(LF-RPA) overcomes the limitations of current U. virens detection technologies, which are time-consuming, require delicate equipment, and have a high false-positive rate. In this study, we used a comparative genomics approach to identify Uv＿3611, a specific gene of U. virens, as the target for the LF-RPA assay. The designed primers and probe efffectively detected the genomic DNA(gDNA) of U. virens and demonstrated no cross-reactivity with related pathogens. Under optimal conditions, the LF-RPA assay demonstrated a sensitivity of 10 pg of U. virens gDNA. Additionally, by incorporating a simplified PEG-NaOH method for plant DNA extraction, the LF-RPA assay enabled the detection of U. virens in rice spikelets within 30 min, without the need for specialized equipment. Furthermore, the LF-RPA assay successfully detected U. virens in naturally infected rice and seed samples in the field. Therefore, the LF-RPA assay is sensitive, efficient, and convenient, and could be developed as a kit for monitoring rice false smut disease in the field.

关键词： rice false smut Ustilaginoidea virens isothermal amplification disease monitoring field diagnosis