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Journal of Ocean University of China 2024年第1期23卷 216-220页

作者： YU Guihong ZHOU Luning wu guangwei LI Dehai Shandong Province Key Laboratory of Applied Mycology and Qingdao International Center on Microbes Utilizing BiogasSchool of Life SciencesQingdao Agricultural UniversityQingdao 266109China School of Medicine and Pharmacy and Sanya Oceanographic InstitutionOcean University of ChinaQingdao 266003China College of Chemical Engineering Nanjing Forestry UniversityNanjing 210037China Laboratory for Marine Drugs and Bioproducts Laoshan LaboratoryQingdao 266237China

Two new dihydropyrones,rhytismatones C(1)and D(2),and a known compound,penicillenol A1(3),were isolated from the co-culture broth of the deep-sea-derived fungus Penicillium crustosum PRB-2 and Suaeda salsa-derived endophytic fungus Peni-cillium citrinum *** structures were elucidated through comprehensive analysis of nuclear magnetic resonance(NMR)spectra and mass *** absolute configurations of new compounds were determined by calculating the electronic circular di-chroism(ECD)***-MS data showed that compounds 1–3 could only be detected in the media of co-culture,suggesting new biosynthetic pathways were activated in the co-cultured *** 1 showed obvious antibacterial activities against Pro-teus ***-1002 and Bacillus subtilis MMBC-1004 with minimum inhibitory concentration(MIC)both at 25μmolL^(-1).

关键词： co-culture Penicillium crustosum Penicillium citrinum dihydropyrones antibacterial activity

A Sustainable WSN System with Heuristic Schemes in IIoT

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Computers, Materials & Continua 2022年第9期72卷 4215-4231页

作者： Wenjun Li Siyang Zhang guangwei wu Aldosary Saad Amr Tolba Gwang-jun Kim School of Computer and Communication Engineering Changsha University of Science and TechnologyChangsha410114China College of Computer and Information Engineering Central South University of Forestry and TechnologyChangsha410114China Computer Science Department Community CollegeKing Saud UniversityRiyadh11437Saudi Arabia Mathematics and Computer Science Department Faculty of ScienceMenoufia UniversityEgypt Department of Computer Engineering Chonnam National UniversityGwangju61186Korea

Recently, the development of Industrial Internet of Things hastaken the advantage of 5G network to be more powerful and more ***, the upgrading of 5G network will cause a variety of issues increase,one of them is the increased cost of coverage. In this paper, we proposea sustainable wireless sensor networks system, which avoids the problemsbrought by 5G network system to some extent. In this system, deployingrelays and selecting routing are for the sake of communication and *** main aim is to minimize the total energy-cost of communication underthe precondition, where each terminal with low-power should be charged byat least one relay. Furthermore, from the perspective of graph theory, weextract a combinatorial optimization problem from this system. After that,as to four different cases, there are corresponding different versions of theproblem. We give the proofs of computational complexity for these problems,and two heuristic algorithms for one of them are proposed. Finally, theextensive experiments compare and demonstrate the performances of thesetwo algorithms.

关键词： Industrial Internet of Things sustainable wireless sensor network system combinatorial optimization problem heuristic algorithms

Effect of expansion waves on cowl shock wave and boundary layer interaction in hypersonic inlet

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Propulsion and Power Research 2024年第1期13卷 80-97页

作者： guangwei wu Ziao Wang Teng Shi Zhibin Zhang Weiyu Jiang Fuxu Quan Juntao Chang Harbin Institute of Technology Harbin 150001China Xi’an Aerospace Propulsion Institute Xi’an 710100China Beijing Power Machinery Institute Beijing 100074China

The interaction of cowl shock wave and boundary layer has a crucial effect on the stability,operability and performance of hypersonic *** studies on inhibiting the sep-aration and managing the strength of the interaction of the shock wave and boundary layer with expansion corner have been ***,the expansion waves near the circular arc shoulder to effectively control the interaction and cowl shock arrangement is little ***,the interaction of the cowl shock wave and boundary layer under thefluence of the expansion waves is studied by inviscid and viscous numerical *** results reveal that the expansion waves have an important impact on the interaction between the cowl shock wave and boundary layer and the strength of shock wave,and that there are four types of inter-action processes with the change of the relative impingement positions of cowl shock *** expansion waves have a different influence on the shock wave and boundary layer inter-action at different incident *** the incident point of the cowl shock wave goes far downstream from the end of the circular arc shoulder,the influence of expansion waves is weakened,and the magnitude of separation zone ***,when the expansion waves are applied to the interaction of the cowl shock wave and boundary layer on the circular arc shoulder,the separation can be effectively *** particular,while the expansion waves interact with the shock wave and boundary layer in the back half of the circular arc shoulder,the separation is best *** with the upstream and downstream inci-dent points,the scale of separation area in the optimal control region is reduced by 65.3%at ***,the total pressure recovery coefficientfirst increases and then decreases when the cowl moves from upstream to downstream,and the total pressure recovery coefficient reaches the maximum value of 68.36%at the incident position of cowl shock wave d Z 8.09

关键词： Boundary layer Expansion waves Cowl shock wave Separation Hypersonic inlet Circular arc shoulder Inviscid and viscous numerical simulations

Review of non-chemical weed management for green agriculture

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International Journal of Agricultural and Biological Engineering 2010年第4期3卷 52-60页

作者： Deng Wei Chen Liping Meng Zhijun wu guangwei Zhang Ruirui National Engineering Research Center for Information Technology in Agriculture Beijing 100097China

This paper reviewed the background and situation for studying and developing non-chemical weed *** pressure and commissariat safety problems indicate that it is essential to deeply study and develop non-chemical weed management *** paper summarized the pros and cons of the non-chemical weed management technologies in aspects of weed control by agronomic method,mechanical method,thermal treatment method,and biological treatment,discussed the defects of the existing non-chemical weeding methods,and put forward some suggestions:(1)The description on the experiments and operation of the non-chemical weeding technologies is suggested to be standardized in order to compare the performance of different weeding *** important information on name of equipment,consumption capacity,working width,travel speed,and weed control levels should always be included in the experimental descriptions;(2)An integration of combinations or sequences of various weed control techniques is suggested to be used to reduce the risk of a selective pressure leading to the predominance of certain species;and(3)It is also suggested for further improvement of the existing weed control methods and further development of the weed detection technology originally developed for precision chemical application in order to use them in non-chemical weed management.

关键词： weed control management non-chemical technology mechanical weed control biological weed control

Recent advances in photochemistry for positron emission tomography imaging

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Chinese Chemical Letters 2024年第8期35卷 149-162页

作者： Jing-Jing Zhang Lujun Lou Rui Lv Jiahui Chen Yinlong Li guangwei wu Lingchao Cai Steven H.Liang Zhen Chen Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest BiomassJiangsu Key Lab of Biomass-Based Green Fuels and ChemicalsInternational Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China Department of Radiology and Imaging Sciences Emory UniversityAtlantaGA 30322United States

As a powerful noninvasive imaging technology,positron emission tomography(PET)has been playing an important role in disease theranostics and drug *** successful application of PET relies on not only the biological properties of PET tracers but also the availability of facile and efficient radiochemical reactions to enable practical production and widespread use of PET *** recently,photochemistry is emerging as a novel,mild and efficient approach to generating PET *** this review,we focus on the recent advances in newly developed photocatalytic radiochemical reactions,innovation on automated photochemical radiosynthesis modules,as well as implementation in late-stage radiolabeling and radio-pharmaceutical synthesis for PET *** believe that this review will inspire the development of more promising radiolabeling protocols for the preparation of clinically useful PET agents.

关键词： Positron emission tomography(PET) Fluorine-18 Carbon-11 Photocatalysis Automation Late-stage functionalization

The Abnormal Choroidal Vessels in Aged Patients

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Eye Science 2002年第1X期18卷 20-22页

作者： Shizhou Huang, Feng Wen, Dezheng wu, guangwei Luo, Caijiao LiuZhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China Zhongshan Ophthalmic Center Sun Yat-sen University Guangzhou 510060 China.

Background: To show the abnormal choroidal vessels in aged patients with indocyanine-green angiography (ICGA).Methods: ICGA was performed in 350 patients with TOPCON TRC-50IA fundus *** images were recorded and retrospectively ***: Five aged patients out of 350 cases were found to have abnormal choroidalvessels. The incidence was 1.43%. The abnormal choroidal vessels showed round- shapet,focal enlargement, abnormal shape and entrance, satellite appearance, and vascularloops. These might be due to congenital abnormality of ***: ICGA could be used to observe the abnormal choroidal vessels.

关键词：靛蓝花青血管造影脉络膜血管异常发病率老年人

新型关节韧带数字体查仪量化评估前交叉韧带部分损伤后的膝关节松弛度

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中国组织工程研究 2025年第27期29卷 5795-5801页

作者：朱哲越张晨葛莹薛晗李若尘吴光伟马瑞西安交通大学第二附属医院骨科中心关节与足踝病区陕西省西安市710004

背景:前交叉韧带部分损伤后膝关节松弛程度的量化测量对于及时诊断、后期治疗和康复非常重要。现缺乏应用关节韧带测量仪进行前交叉韧带部分损伤诊断的相关研究。目的:探讨新型关节韧带数字体查仪在前交叉韧带部分损伤中的诊断价值。方... 详细信息

背景:前交叉韧带部分损伤后膝关节松弛程度的量化测量对于及时诊断、后期治疗和康复非常重要。现缺乏应用关节韧带测量仪进行前交叉韧带部分损伤诊断的相关研究。目的:探讨新型关节韧带数字体查仪在前交叉韧带部分损伤中的诊断价值。方法:纳入30名单侧前交叉韧带部分损伤患者及20名健康志愿者作为研究对象,应用国产新型关节韧带数字体查仪测量80,120,150 N三种负荷下每侧膝关节的胫骨向前位移值,比较前交叉韧带部分损伤组和对照组的胫骨向前位移值和双侧差异值,分析受试者工作特征曲线,计算曲线下面积,并确定新型关节韧带数字体查仪的诊断灵敏度及特异度。结果与结论:①前交叉韧带部分损伤组和对照组在年龄、性别、体质量指数和病程方面差异均无显著性意义(P>0.05);②前交叉韧带部分损伤组胫骨向前位移值的双侧差异值明显高于对照组(P<0.05),且前交叉韧带部分损伤组患侧的胫骨向前位移值明显高于健侧(P<0.05);③施加负荷在80 N时的诊断准确性最高(cutoff值=10.45 mm),曲线下面积为0.813(95%CI:0.708-0.919),敏感性和特异性分别为76.7%和70.0%;④提示新型关节韧带数字体查仪可以客观量化评估前交叉韧带部分损伤后的膝关节松弛度,可为怀疑前交叉韧带部分损伤的患者提供客观的诊断依据。

关键词：前交叉韧带前交叉韧带损伤膝关节松弛胫骨前移数字化关节测量

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自由端盖四梁凹形宽带弯张换能器设计

声学技术 2022年第4期41卷 618-623页

作者：吴光未中国科学院声学研究所北京100190 北京海洋声学装备工程技术研究中心北京100190 中国科学院大学北京100190

针对凹形弯张换能器改善低频宽带工作特性的技术需求,提出了一种自由端盖四梁凹形弯张换能器新结构。结构中将纵向振子的端部设计成弹性辅助梁,与主弯曲梁连接构成复合弯曲梁。同时为了克服弹性辅助梁对振动辐射带来的不利影响,引入了... 详细信息

针对凹形弯张换能器改善低频宽带工作特性的技术需求,提出了一种自由端盖四梁凹形弯张换能器新结构。结构中将纵向振子的端部设计成弹性辅助梁,与主弯曲梁连接构成复合弯曲梁。同时为了克服弹性辅助梁对振动辐射带来的不利影响,引入了由纵向振子驱动的方形自由端盖并以此构成新的辐射端面。利用有限元软件分析了这种新结构弯张换能器的多模振动特性,模态分析表明换能器的前五阶模态是可利用的主要工作模态,频率间隔可以通过敏感结构参数进行调控。通过优化给出了一种设计方案,换能器整体几何尺寸为140 mm×140 mm×396 mm,仿真分析了换能器在水中的导纳特性和发射电压响应曲线,结果表明:换能器最大发射电压响应大于145 dB,发射电压响应起伏小于6 dB的工作频带为1.5~4.3 kHz,发射电压响应起伏小于10 dB的工作频带为1.5~8 kHz,具有低频宽带大功率工作特性。

关键词：自由端盖低频宽频带多模耦合复合弯曲梁

Local Electroretinogram and Pattern Visual Evoked Potential in Maculopathies

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Eye Science 1996年第1期16卷 40-45页

作者： De-zheng wu, guangwei Luo, Yi HuangZhongshan Ophtalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou 510050, China Department of Ophthalmology, Xiang Fan Centre Hospital, Hubei 441021, China Zhongshan Ophtalmic Center Sun Yat-sen University of Medical Sciences Guangzhou China.

Purposes: To observe the characteristics of local electroretinogram (LERG) in normal subjects and patients with maculopathies, and to evaluate the applied worth of LERG and pattern visual evoked potential (PVEP) in maculopathies. Methods: LERGs at 5° and 15° macular regions were recorded from 27 normal subjects (54 eyes). The factors of age, different eyes and stimulate areas for LERG influence were observed. Meanwhile, the LERG and PVEP were recorded from 25 patients (35 eyes) with maculopathies for making contrast study. Results: In normal subjects, there was no significant influence of age to LERG. As the stimulated areas increased, the a- and b-wave amplitudes of LERG increased. In the patients with maculopathies, the a- and b-wave amplitudes of LERG at 5°, 10°and 15° macular regions were significantly lowered and the mean values of P1 latency were prolonged and N1-P1 amplitudes of VEP were lowered, comparing with the control group. In the nearing stimulated area (5°LERG and 14. 9×19°PVEP.),

关键词： maculopathy local electroretinogram (LERG) pattern visual evoked potential (PVEP)

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自由端盖Ⅲ型宽带弯张换能器的设计

声学学报 2022年第4期47卷 495-502页

作者：吴光未莫喜平柴勇刘永平中国科学院声学研究所北京100190 北京海洋声学装备工程技术研究中心北京100190 中国科学院大学北京100049

提出了一种利用多模耦合实现低频、宽带、大功率特性的新结构Ⅲ型弯张换能器。通过在压电陶瓷堆内部嵌入与凹型弯张壳体相连的弹性辅助弯曲梁结构,并用弯曲圆盘作为顶部自由端盖,增加有效工作模态。利用有限元方法对换能器进行了设计优... 详细信息

提出了一种利用多模耦合实现低频、宽带、大功率特性的新结构Ⅲ型弯张换能器。通过在压电陶瓷堆内部嵌入与凹型弯张壳体相连的弹性辅助弯曲梁结构,并用弯曲圆盘作为顶部自由端盖,增加有效工作模态。利用有限元方法对换能器进行了设计优化,分析结果显示换能器在低频段存在4个主要工作模态。根据优化结果,加工制作了换能器样机,水池实验的测试结果表明:在1.5~5.5 kHz范围内,换能器样机的发送电压响应均大于135 dB;1.5~4 kHz内的最大发送电压响应大于142 dB,响应起伏小于6 dB。研究结果表明自由端盖Ⅲ型弯张换能器不仅能够在小尺寸设计下实现大功率工作,还能获得低频宽带发射性能。

关键词：换能器工作模态有限元方法发射性能水池实验端盖压电陶瓷尺寸设计