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Experimental Wave Attenuation Study over Flexible Plants on a Submerged Slope

Journal of Ocean University of China 2017年第6期16卷 1009-1017页

作者： YIN Zegao YANG Xiaoyu xu yuanzhao DING Meiling LU Haixiang Shandong Province Key Laboratory of Ocean Engineering Ocean University of China Qingdao 266100 P. R. China Engineering College Ocean University of China Qingdao 266100 P. R. China

Using plants is a kind of environmentally-friendly coastal protection to attenuate wave energy. In this paper, a set of experiments were conducted to investigate the wave attenuation performance using flexible grasses on a submerged slope, and the wave attenuation coefficient for these experiments was calculated for different still water depths, slope and grass configurations. It was found that the slope plays a significant role in wave attenuation. The wave attenuation coefficient increases with increasing relative row number and relative density. For a small relative row number, the two configurations from the slope top to its toe and from the slope toe to its top performed equally to a large extent. For a medium relative row number, the configuration from the slope toe to its top performed more poorly than that from the slope top to its toe; however, it performed better than that from the slope top to its toe for a high relative row number. With a single row of grasses close to the slope top from the slope toe, the wave attenuation coefficient shows double peaks. With increasing grass rows or still water depth, the grass location corresponding to the maximum wave attenuation coefficient is close to the slope top. The dimensional analysis and the least square method were used to derive an empirical equation of the wave attenuation coefficient considering the effect of relative density, the slope, the relative row number and the relative location of the middle row, and the equation was validated to experimental data.

关键词： submerged slope flexible grasses wave attenuation coefficient experiment

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沉积气压对金刚石膜微米纳米结构转变的影响

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金刚石与磨料磨具工程 2021年第1期41卷 12-16页

作者：范冰庆王传新徐远钊黄凯武汉工程大学材料科学与工程学院湖北省等离子体化学与新材料重点实验室武汉430073

利用热丝化学气相沉积(HFCVD)装置研究不同气压下氩气体积分数对金刚石膜晶粒尺寸的影响,并对不同气压下其微米纳米尺寸转变的临界值进行分析,同时用SEM以及拉曼光谱对沉积的金刚石膜进行分析。结果表明:随着氩气体积分数的增大,金刚石... 详细信息

利用热丝化学气相沉积(HFCVD)装置研究不同气压下氩气体积分数对金刚石膜晶粒尺寸的影响,并对不同气压下其微米纳米尺寸转变的临界值进行分析,同时用SEM以及拉曼光谱对沉积的金刚石膜进行分析。结果表明:随着氩气体积分数的增大,金刚石膜的晶粒会越来越小,但不同气压下金刚石膜从微米转变成纳米级别所需要的氩气体积分数不一样;在2.0~0.5 kPa范围内,随着气压的降低,转变所需的氩气体积分数逐步降低,从2.0 kPa时需要60.0%,到1.5 kPa时需要52.5%,再到1.0 kPa时需要32.5%降至0.5 kPa时仅需20.0%。在临界点得到的金刚石膜的质量与内应力也不相同,随着气压降低,膜的质量提高,内应力增大。

关键词：热丝CVD 金刚石薄膜气压微米纳米转变

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基于MS-FCM算法的船体板熔池图像处理技术

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焊接学报 2024年第3期45卷 82-90,I0007,I0008页

作者：徐远钊罗玖田方乃文冯志强武鹏博黎泉北部湾大学广西船舶数字化设计与先进制造工程技术研究中心钦州535011 广西海洋工程装备与技术重点实验室钦州535011 中国机械总院集团哈尔滨焊接研究所有限公司哈尔滨150028

熔池的图像处理与特征提取技术是船舶熔化极气体保护焊(gas metal arc welding, GMAW)智能化焊接质量监控的重要内容,针对船体板GMAW焊接过程中的烟雾大、飞溅多等不稳定特性导致熔池图像采集模糊、边缘提取困难等问题,提出一种基于均... 详细信息

熔池的图像处理与特征提取技术是船舶熔化极气体保护焊(gas metal arc welding, GMAW)智能化焊接质量监控的重要内容,针对船体板GMAW焊接过程中的烟雾大、飞溅多等不稳定特性导致熔池图像采集模糊、边缘提取困难等问题,提出一种基于均值漂移(mean shift, MS)优化模糊C均值聚类(fuzzy c-means, FCM)的图像处理算法.在优化设计焊接动态视觉传感系统中,以最大化保证图像信息采集清晰度的基础上,利用MS算法获取超像素图像以解决FCM算法对噪声的敏感性,同时在FCM算法上引入加权邻域窗口,以增强MS-FCM算法的鲁棒性,来克服烟雾、飞溅、弧光等噪声影响,进而完成图像分割与边缘提取.最后,设计出关于FCM、空间约束模糊C均值聚类(fuzzy c-means with spatial constraints, FCM_S)、加强型模糊聚类(enhanced fuzzy c-means, ENFCM)和模糊局部信息C均值聚类(fuzzy local information c-means clustering, FLICM)算法的4种不同图像处理方法,并与MSFCM优化模型进行边缘分割效果对比,获取几种方法所提取的熔宽,验证熔池几何特征的提取精度.结果表明,MS-FCM算法在船舶焊接熔池图像处理方面能有效抑制噪声干扰,平滑信息,达到较高的提取精度.

关键词：模糊C均值聚类均值漂移图像分割船体板熔化极气体保护焊

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饲料溶失对养殖水质的影响及其处置技术

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水产学杂志 2020年第4期33卷 50-58页

作者：许元钊张春梅毕永红贺文芳徐勇斌李明大连海洋大学辽宁大连116023 中国科学院水生生物研究所淡水生态与生物技术国家重点试验室湖北武汉430072 金华市水产技术推广站浙江金华321017

为研究饲料溶失对养殖水质的影响及其解决途径,开展了2个阶段的试验:第1阶段,将1.0g粗蛋白含量≥28%的3种市售常用配合饲料加到2.0L蒸馏水和过滤的养殖池水中96h,探究长时间浸泡释放营养盐及有毒物质的过程;第2阶段,将索罗金小球藻Chlor... 详细信息

为研究饲料溶失对养殖水质的影响及其解决途径,开展了2个阶段的试验:第1阶段,将1.0g粗蛋白含量≥28%的3种市售常用配合饲料加到2.0L蒸馏水和过滤的养殖池水中96h,探究长时间浸泡释放营养盐及有毒物质的过程;第2阶段,将索罗金小球藻Chlorella sorokiniana接种到1.2μm滤膜过滤的第1阶段处理液中培养8d,测定不同时间水体的硝酸盐、磷酸盐、铵态氮、亚硝酸盐含量及小球藻生长,考察小球藻去除氮磷及有毒物质的能力。试验在光照培养箱中进行,温度为(25±0.5)℃,每个容器均处于密封状态。结果显示:3种饲料在蒸馏水浸泡96h后硝酸盐含量达(0.785±0.171)mg/L,磷酸盐达(1.012±0.169)mg/L,铵态氮达(1.200±0.457)mg/L,亚硝酸盐为(0.030±0.009)mg/L;在养殖水中96h后,硝酸盐含量从(0.066±0.012)mg/L增至(1.465±0.108)mg/L,磷酸盐从(0.007±0.001)mg/L增至(1.747±0.224)mg/L,铵态氮从(0.016±0.002)mg/L增至(0.761±0.266)mg/L,亚硝酸盐从(0.007±0.001)mg/L增至(0.037±0.003)mg/L,增量分别为1.400mg/L、1.740mg/L、0.761mg/L和0.030mg/L;养殖水的营养释放较蒸馏水快。接种小球藻培养8d后,两个处理组中硝酸盐的去除率分别为77%和83%,磷酸盐为62%和56%,铵态氮为92%和89%;蒸馏水处理组小球藻OD680从接种时的(0.101±0.004)增加至(0.548±0.099),增加了0.446,生物量平均增加了2.126g/L;养殖原水组OD680从(0.104±0.002)增加至(0.758±0.131),增加了0.654,生物量平均增加了3.115g/L。研究表明:饲料浸泡的营养释放使水体氮、磷等含量迅速升高;小球藻对此引起的水体营养加富具有较好的吸收净化效果。

关键词：饲料溶失养殖废水水质净化小球藻

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Enantio-divergent C–H borylation with two different ligands from a single chiral source

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Science China Chemistry 2025年第1期68卷 226-232页

作者： Rongrong Du Senmiao xu State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical Physics Chinese Academy of Sciences College of Material Chemistry and Chemical Engineering Key Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of Education Hangzhou Normal University University of Chinese Academy of Sciences

Reported here is an iridium-catalyzed enantio-divergent C（sp3）–H borylation of α-gem-dimethyl groups of trifluoromethyl ketone-derived hydrazones to construct a series of acyclic all-carbon quaternary stereocenters with a high level of chiral induction. Two different chiral bidentate boryl ligands from a common chiral source not only can switch the enantioselectivity but also are complementary in terms of the substrate scope.

关键词： asymmetric catalysis C–H borylation all-carbon quaternary stereocenters synthetic methods

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Aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders:progress of experimental models based on disease pathogenesis

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Neural Regeneration Research 2025年第2期20卷 354-365页

作者： Li xu Huiming xu Changyong Tang Department of Neurology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina

Neuromyelitis optica spectrum disorders are neuroinflammatory demyelinating disorders that lead to permanent visual loss and motor *** date,no effective treatment exists as the exact causative mechanism remains ***,experimental models of neuromyelitis optica spectrum disorders are essential for exploring its pathogenesis and in screening for therapeutic *** most patients with neuromyelitis optica spectrum disorders are seropositive for IgG autoantibodies against aquaporin-4,which is highly expressed on the membrane of astrocyte endfeet,most current experimental models are based on aquaporin-4-IgG that initially targets *** experimental models have successfully simulated many pathological features of neuromyelitis optica spectrum disorders,such as aquaporin-4 loss,astrocytopathy,granulocyte and macrophage infiltration,complement activation,demyelination,and neuronal loss;however,they do not fully capture the pathological process of human neuromyelitis optica spectrum *** this review,we summarize the currently known pathogenic mechanisms and the development of associated experimental models in vitro,ex vivo,and in vivo for neuromyelitis optica spectrum disorders,suggest potential pathogenic mechanisms for further investigation,and provide guidance on experimental model *** addition,this review summarizes the latest information on pathologies and therapies for neuromyelitis optica spectrum disorders based on experimental models of aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders,offering further therapeutic targets and a theoretical basis for clinical trials.

关键词： aquaporin-4 experimental model neuromyelitis optica spectrum disorder pathogenesis

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Reducing the measurement errors in nonadiabatic holonomic quantum computers

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 64-70页

作者： Guo-Fu xu Department of Physics Shandong University

Nonadiabatic holonomic quantum computers serve as the physical platform for nonadiabatic holonomic quantum *** quantum computation has entered the noisy intermediate-scale era, building accurate intermediate-scale nonadiabatic holonomic quantum computers is clearly necessary. Given that measurements are the sole means of extracting information, they play an indispensable role in nonadiabatic holonomic quantum computers. Accordingly, developing methods to reduce measurement errors in nonadiabatic holonomic quantum computers is of great importance. However, while much attention has been given to the research on nonadiabatic holonomic gates, the research on reducing measurement errors in nonadiabatic holonomic quantum computers is severely lacking. In this study, we propose a measurement error reduction method tailored for intermediate-scale nonadiabatic holonomic quantum computers. The reason we say this is because our method can not only reduce the measurement errors in the computer but also be useful in mitigating errors originating from nonadiabatic holonomic gates. Given these features,our method significantly advances the construction of accurate intermediate-scale nonadiabatic holonomic quantum computers.

关键词： quantum holonomy quantum computation measurement errors

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高压氧治疗对肾小球肾炎患者蛋白尿的影响

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中国临床医学杂志 2000年第2期7卷 189-190页

作者：朱济众徐元钊上海市第五人民医院 200400 上海医科大学中山医院 200032

目的：探讨高压氧对肾小球肾炎患者蛋白尿的治疗作用。方法：采用高压氧，观察其对尿蛋白及肾功能的影响。结果：４１例患者经高压氧治疗后，尿蛋白均有不同程度减少，个别患者转阴。结论：高压氧作为蛋白尿治疗方法可做进一步探索与验证。

关键词：蛋白尿肾小球肾炎高压氧疗法影响

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偏压方式对金刚石薄膜生长的影响研究

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真空与低温 2022年第2期28卷 187-192页

作者：黄凯王传新徐远钊武汉工程大学湖北省等离子体化学与新材料重点实验室武汉430073

采用脉冲偏压和直流偏压辅助热丝化学气相沉积装置在硅片表面制备了金刚石薄膜,对比研究了两种方式施加的偏压大小对薄膜表面形貌以及质量的影响。利用扫描电子显微镜和拉曼光谱分别表征了薄膜的形貌和质量,采用等离子体光谱诊断分析了... 详细信息

采用脉冲偏压和直流偏压辅助热丝化学气相沉积装置在硅片表面制备了金刚石薄膜,对比研究了两种方式施加的偏压大小对薄膜表面形貌以及质量的影响。利用扫描电子显微镜和拉曼光谱分别表征了薄膜的形貌和质量,采用等离子体光谱诊断分析了薄膜生长过程的气相化学反应。结果表明:两种偏压方式下偏压的大小对薄膜的形貌及品质均有较大影响。相比直流偏压法,用脉冲偏压法制备的金刚石薄膜的晶粒较大、均匀性较好,薄膜的内应力较小;偏压过大时,薄膜表面晶粒棱边会出现电子流轰击刻蚀作用导致的晶粒细化,直流偏压下发生这种情况需要的电压较脉冲偏压低,表明持续的电子流轰击更易造成表面晶粒棱边的刻蚀。高偏压下同时伴随二次形核晶粒细化现象。光谱诊断结果表明,产生这些差异的主要原因是活性基团强度随偏压增大而增加,脉冲偏压能产生更强的活性粒子。

关键词：热丝CVD 偏压金刚石形貌变化晶粒细化

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Mitophagy in acute central nervous system injuries:regulatory mechanisms and therapeutic potentials

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Neural Regeneration Research 2025年第9期20卷 2437-2453页

作者： Siyi xu Junqiu Jia Rui Mao Xiang Cao Yun xu Department of Neurology Nanjing Drum Tower HospitalClinical College of Jiangsu UniversityNanjingJiangsu ProvinceChina Department of Neurology Nanjing Drum Tower HospitalChinese Academy of Medical Science&Peking Union Medical CollegeNanjingJiangsu ProvinceChina Department of Neurology Nanjing Drum Tower HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjingJiangsu ProvinceChina State Key Laboratory of Pharmaceutical Biotechnology and Institute of Translational Medicine for Brain Critical Diseases Nanjing UniversityNanjingJiangsu ProvinceChina Jiangsu Key Laboratory for Molecular Medicine Medical School of Nanjing UniversityNanjingJiangsu ProvinceChina Nanjing Neurology Medical Center NanjingJiangsu ProvinceChina

Acute central nervous system injuries,including ischemic stro ke,intracerebral hemorrhage,subarachnoid hemorrhage,traumatic brain injury,and spinal co rd injury,are a major global health *** optimal therapies and improving the long-term neurological functions of patients with acute central nervous system injuries are urgent *** are susceptible to damage after acute central nervous system injury,and this leads to the release of toxic levels of reactive oxygen species,which induce cell ***,a selective form of autophagy,is crucial in eliminating redundant or damaged mitochondria during these *** evidence has highlighted the significant role of mitophagy in acute central nervous system *** this review,we provide a comprehensive overview of the process,classification,and related mechanisms of *** also highlight the recent developments in research into the role of mitophagy in various acute central nervous system injuries and drug therapies that regulate *** the final section of this review,we emphasize the potential for treating these disorders by focusing on mitophagy and suggest future research paths in this area.

关键词： autophagy intracerebral hemorrhage ischemic stroke mitochondria mitochondrial biogenesis mitochondrial quality control mitophagy spinal cord injury subarachnoid hemorrhage traumatic brain injury

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