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高频超声联合超声造影对阴囊肿块良恶性的鉴别价值

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海南医学 2024年第3期35卷 395-399页

作者：苏航韩正阳吴志彬陈争光郑州大学第一附属医院超声医学科河南郑州450053

目的探究高频超声联合超声造影对阴囊肿块良恶性的鉴别价值,为临床诊治提供参考。方法选取2020年1月至2023年12月郑州大学第一附属医院收治的94例阴囊肿块患者作为研究对象,经病理检查结果分为恶性病变组54例和良性病变组40例,以病理检... 详细信息

目的探究高频超声联合超声造影对阴囊肿块良恶性的鉴别价值,为临床诊治提供参考。方法选取2020年1月至2023年12月郑州大学第一附属医院收治的94例阴囊肿块患者作为研究对象,经病理检查结果分为恶性病变组54例和良性病变组40例,以病理检查结果为金标准,分析高频超声联合超声造影对阴囊肿块良恶性的鉴别价值。结果恶性病变组患者的阴囊肿块长径、短径分别为(5.67±2.85)cm、(3.73±2.04)cm,明显长于良性病变组的(3.84±2.56)cm、(2.31±1.45)cm,恶性病变组患者阴囊肿块位于睾丸位置的比例为96.30%,明显高于良性病变组的35.00%,差异均有统计学意义(P0.05);良、恶性阴囊肿块的增强强度、增强均匀度、造影剂进入与消退方式、增强形式比较,差异均有统计学意义(P<0.05);阴囊肿块良性病变平均渡越时间为(28.04±8.65)s,明显短于恶性病变的(49.21±15.29)s,开始增强时间为(20.53±7.17)s,明显晚于恶性病变的(17.14±4.91)s,差异均有统计学意义(P<0.05);阴囊肿块良性病变的峰值强度为(50.17±8.64)dB,明显高于恶性病变的(45.41±4.31)dB,AUC值、上升支斜率分别为(1043.82±304.25)mm^(2)、(0.21±0.17)dB/s,明显低于恶性病变的(1400.59±340.08)mm^(2)、(0.90±0.20)dB/s,差异均有统计学意义(P<0.05)。结论高频超声联合超声造影应用于阴囊肿块良恶性鉴别的准确率较高,不同病变性质阴囊肿块的高频超声、超声造影表现有明显差异。

关键词：阴囊肿块高频超声超声造影增强时间达峰时间准确率

Spontaneous remission of autoimmune pancreatitis: Four case reports

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World Journal of Clinical Cases 2022年第23期10卷 8232-8241页

作者： Bin-Bin Zhang Jian-Wei Huo zheng-han yang Zhen-Chang Wang Er-Hu Jin Department of Radiology Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China Department of Radiology Beijing Hospital of Traditional Chinese MedicineCapital Medical UniversityBeijing 100010China

BACKGROUND Autoimmune pancreatitis(AIP)is a particular type of chronic pancreatitis,and steroid treatment of AIP is *** remission(SR)of AIP without steroids is relatively *** international consensus for the treatment of autoimmune pancreatitis suggests that patients with AIP with obstructive jaundice,abdominal pain,and back pain related to the pancreas or the bile duct should be treated with steroids;most asymptomatic patients with AIP may improve without ***,in our clinical work,we found that the clinical characteristics of AIP patients with SR *** of these cases are described *** addition,to our knowledge,there is no previously published report of dynamic imaging before and after SR of AIP at *** SUMMARY We present the cases of four patients with AIP(two females and two males)in which the AIP improved spontaneously without steroid *** patients were asymptomatic,one patient had abdominal pain with obstructive jaundice,and one patient had intermittent right upper abdominal *** patients presented with localized pancreatic enlargement and one with diffuse pancreatic *** addition to the pancreatic lesions,bile duct involvement was seen in two patients,and no extra-pancreatic organ involvement was found in the other two *** serum IgG4 level of all patients was more than twice the normal *** SR in the four patients,the affected pancreases exhibited three types of image features:Return to normal,progressive fibrosis,and atrophy and *** The clinical features of SR in our four patients with AIP differ,but the imaging findings share some *** SR,in some cases the affected pancreas could return to normal,although some patients suffer from progressive fibrosis and atrophy as well as calcification.

关键词： Autoimmune pancreatitis Spontaneous remission Computed tomography Magnetic resonance imaging Case report

A Graded Speed Control Method for Cyborg Rats Based on Electrical Stimulation of the Cuneiform Nucleus

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Journal of Bionic Engineering 2024年第3期21卷 1334-1346页

作者： hanyi Ling Le han Nenggan zheng Qiushi Academy for Advanced Studies(QAAS) Zhejiang UniversityHangzhou310007China The State Key Lab of Brain-Machine Intelligence Zhejiang UniversityHangzhou310007China College of Biomedical Engineering&Instrument Science Zhejiang UniversityHangzhou310007China College of Computer Science and Technology Zhejiang UniversityHangzhou310007China CCAI by MOE and Zhejiang Provincial Government(ZJU) Hangzhou310007China

The precise movement speed regulation is a key factor to improve the control effect and efficiency of the cyborg ***,the current stimulation techniques cannot realize the graded control of the *** this study,we achieved the multi-level speed regulation of cyborg rats in the large open field and treadmill by specifically targeting the Cuneiform Nucleus(CnF)of the Mesencephalic Locomotor Region(MLR).Detailed,we measured the influence of each stimulation parameter on the speed control process which included the real-time speed,accelerated speed,response time,and acceleration *** concluded that the pulse period and the pulse width were the main determinants influencing the accelerated speed of cyborg *** the amplitude of stimulation was found to affect the response time exhibited by the cyborg *** study provides valuable insights into the regulation of rat locomotion speed and highlights the potential for utilizing this approach in various experimental settings.

关键词： Cyborg rats Cuneiform nucleus Graded control Speed regulation

Lensless opto-electronic neural network with quantum dot nonlinear activation

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Photonics Research 2024年第4期12卷 682-690页

作者： WANXIN SHI XI JIANG zheng HUANG XUE LI YUyang han SIGANG yang HAIzheng ZHONG HONGWEI CHEN Beijing National Research Center for Information Science and Technology(BNRist) Department of Electronic EngineeringTsinghua UniversityBeijing 100084China China Mobile Research Institute Beijing 100053China MIIT Key Laboratory for Low-dimensional Quantum Structure and Devices School of Materials Sciences&EngineeringBeijing Institute of TechnologyBeijing 100081China

With the swift advancement of neural networks and their expanding applications in many fields, optical neural networks have gradually become a feasible alternative to electrical neural networks due to their parallelism, high speed, low latency, and power consumption. Nonetheless, optical nonlinearity is hard to realize in free-space optics, which restricts the potential of the architecture.

关键词： network neural networks

Identification of Motor Nuclei in the Medulla Oblongata of Carp for Biological Control

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Journal of Bionic Engineering 2024年第2期21卷 842-851页

作者： yang Zhao Yong Peng Yudong Wen Lingjun han Yanhong Yan Xueying Dong Hui Zhang zheng Zhao Xiaoyue Liu School of Electrical Engineering Yanshan UniversityQinhuangdao066004China School of Mechanical Engineering Yanshan UniversityQinhuangdao066004China Key Laboratory of National Defense of Mechanical Structure and Material Science Under Extreme Conditions Yanshan UniversityQinhuangdao066004China Institute of Marine Science and Engineering Yanshan UniversityQinhuangdao066004China Shijiazhuang University Shijiazhuang050035China

Brain-controlled technology is the key technology in biological control,and the corresponding relationship between animal brain nuclei and motor behavior is the *** purpose of this study was to explore the motor nuclei of the medulla oblongata in *** carps were subjected to electrical stimulation and chemical stimulation experiments,respectively,in the water-free state,and the effective chemical stimulation sites were injected with the pontamine sky blue *** brain tissue sections were obtained by paraffin tissue section technology and the neutral red staining *** comparing the positions of the brain nuclei shown in earlier studies,the motor nerve nuclei in the medulla oblongata were *** brain electrode was implanted into the motor nucleus of the medulla oblongata,and the underwater control experiment and behavioral tests were carried out with different electrical stimulation *** results showed that the abducens nucleus(NVI)was the motor nucleus that controls the ipsilateral steering,and the facial nucleus(NVII)was the motor nucleus that controls the forward *** adjusting the stimulation voltage and the stimulation pulse number,the carp can be stably controlled to achieve a left–right steering motion of 30°–180°and a forward motion of more than 80 cm/*** study indicated that the quantitative control of the steering and forward behavior of the carp can be achieved by electrical stimulation of the NVI and NVII,which provided a certain experimental basis for the accurate control of the carp robot.

关键词： Biological control Carp Medulla oblongata motor nucleus Electrical stimulation technique Chemical stimulation technique

Macroscopic model and statistical model to characterize electromagnetic information of a digital coding metasurface

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National Science Review 2024年第3期11卷 159-171页

作者： Rui Wen Shao Jun Wei Wu zheng Xing Wang Hui Xu han Qing yang Qiang Cheng Tie Jun Cui Institute of Electromagnetic Space Southeast University State Key Laboratory of Millimeter Waves Southeast University Peng Cheng Laboratory Pazhou Laboratory(Huangpu)

A digital coding metasurface is a platform connecting the digital space and electromagnetic wave space, and has therefore gained much attention due to its intriguing value in reshaping wireless channels and realizing new communication architectures. Correspondingly, there is an urgent need for electromagnetic information theory that reveals the upper limit of communication capacity and supports the accurate design of metasurface-based communication systems. To this end, we propose a macroscopic model and a statistical model of the digital coding metasurface. The macroscopic model uniformly accommodates both digital and electromagnetic aspects of the meta-atoms and predicts all possible scattered fields of the digital coding metasurface based on a small number of simulations or measurements. Full-wave simulations and experimental results show that the macroscopic model is feasible and accurate. A statistical model is further proposed to correlate the mutual coupling between meta-atoms with covariance and to calculate the entropy of the equivalent currents of digital coding metasurface. These two models can help reconfigurable intelligent surfaces achieve more accurate beamforming and channel estimation, and thus improve signal power and coverage. Moreover, the models will encourage the creation of a precoding codebook in metasurface-based direct digital modulation systems, with the aim of approaching the upper limit of channel capacity. With these two models, the concepts of current space and current entropy, as well as the analysis of information loss from the coding space to wave space, is established for the first time, helping to bridge the gap between the digital world and the physical world, and advancing developments of electromagnetic information theory and new-architecture wireless systems.

关键词： electromagnetic information theory current entropy current space digital coding metasurface macroscopic model statistical model

Chirality transfer induced circularly polarized luminescence of achiral dye molecules by plasmonic nanohelicoid

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Nano Research 2024年第9期17卷 8408-8414页

作者： han Gao ChunLian Zhan Tianqi Zhao Jianzhong zheng College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China School of Environmental Science and Engineering Nanjing Tech UniversityNanjing 211816China

Optical materials with circularly polarized luminescence(CPL)features have attracted a growing interest due to their crucial role in biological sensing,display,spintronics,information storage,and so ***,CPL emissions in hybrid nanoparticle systems,in particular,chirality transfer induced CPL from chiral plasmonic nanoparticles,have rarely been explored due to a lack of effective bottom-up synthesis ***,we creatively take advantage of the newly introduced chiral plasmonic nanoparticles-gold nanohelicoid(GNH)to excite the CPL of achiral Rhodamine 6G(R6G).The fabricated GNH@R6G-SiO_(2)shows obvious CPL signals with|glum|up to *** with the single GNH,the photoluminescence(PL)dissymmetry factor of the single GNH@R6G-SiO_(2)is similar,but with 25 folds higher PL intensities under different circular *** research not only offers an effective and feasible method to fabricate single-particle level CPL-active materials,but also provides guidelines on how to regulate the CPL of achiral luminophores from chiral plasmonic nanostructures,thereby enlarging the category and quantity of CPL-active materials that can be applied for photonic technologies and visualization biosensing,especially some intracellular chirality related detection.

关键词： circularly polarized luminescence gold nanohelicoids chiral plasmonic

Neural Circuitry Involving Substance P in Male Sexual Behavior

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Neuroscience Bulletin 2024年第4期40卷 544-546页

作者： Xinrong Wang Junqiang zheng han Xu Department of Neurobiology and Department of Neurology of the Second Affiliated Hospital and School of Brain Science and Brain Medicine Zhejiang University School of MedicineHangzhou310058China Nanhu Brain-Computer Interface Institute Hangzhou311100China Liangzhu Laboratory MOE Frontier Science Center for Brain Science and Brain-machine IntegrationState Key Laboratory of Brain-Machine IntelligenceZhejiang UniversityHangzhou311121China NHC and CAMS Key Laboratory of Medical Neurobiology Zhejiang UniversityHangzhou310058China Lingang Laboratory Shanghai200031China

Male sexual behavior is an innate social behavior crucial for reproduction[1].Previous studies have identified several brain regions crucial for the control of both sexual and aggressive behaviors in ***,molecularly specified neural circuits that specifically control male sexual behavior remain *** with the inherently rewarding nature of sexual behavior,previous research has implicated the role of the dopamine system in regulating sexual desire[2].However,the interaction between reward and copulation at the circuit level remains largely ***,it is unclear if the associated neural pathways are specific in modulating sexual reward.

关键词： behavior neural specified

Adaptive Trajectory Tracking Control for Nonholonomic Wheeled Mobile Robots:A Barrier Function Sliding Mode Approach

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IEEE/CAA Journal of Automatica Sinica 2024年第4期11卷 1007-1021页

作者： Yunjun zheng Jinchuan zheng Ke Shao han Zhao Hao Xie Hai Wang the School of Mechanical Engineering Hefei University of TechnologyHefei 230009China the School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyHawthorn VIC 3122Australia the School of Civil Aviation Northwestern Polytechnical UniversityXi’an 710072China the Shanghai Aerospace Control Technology Institute Shanghai 201109 the School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China the College of Science HealthEngineering and EducationMurdoch UniversityPerth WA6150Australia

The trajectory tracking control performance of nonholonomic wheeled mobile robots(NWMRs)is subject to nonholonomic constraints,system uncertainties,and external *** paper proposes a barrier function-based adaptive sliding mode control(BFASMC)method to provide high-precision,fast-response performance and robustness for *** with the conventional adaptive sliding mode control,the proposed control strategy can guarantee that the sliding mode variables converge to a predefined neighborhood of origin with a predefined reaching time independent of the prior knowledge of the uncertainties and disturbances *** advantage of the proposed algorithm is that the control gains can be adaptively adjusted to follow the disturbances amplitudes thanks to the barrier *** benefit is that the overestimation of control gain can be eliminated,resulting in chattering ***,a modified barrier function-like control gain is employed to prevent the input saturation problem due to the physical limit of the *** stability analysis and comparative experiments demonstrate that the proposed BFASMC can ensure the prespecified convergence performance of the NWMR system output variables and strong robustness against uncertainties/disturbances.

关键词： Adaptive sliding mode barrier function nonholonomic wheeled mobile robot(NWMR) trajectory tracking control