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arXiv 2023年

作者： Zhai, Jiyuan Pan, Weimin He, Feisi Ge, Rui Mi, Zhenghui Sha, Peng Jin, song Han, Ruixiong Wang, Qunyao Lin, Haiying Wang, Guangwei Li, Mei Sang, Minjing Sun, Liangrui Ye, Rui Zhao, Tongxian Li, Shaopeng Zhu, Keyu Liu, Baiqi Wang, Xiaolong Yang, Xiangchen Bian, Xiaojuan Zhang, Xiangzhen Ma, Huizhou Dai, xuwen Zhang, Zhanjun Zhang, Liang Zhao, Hui Guo, Runbin Mu, Zhihui Yang, Conglai Zheng, Xiaobing Dong, Chao Huang, Tongming Ma, Qiang Zheng, Hongjuan Liu, Ming Wang, Zihan Zhou, Wenzhong Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Key Laboratory of Particle Acceleration Physics & Technology Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Center for Superconducting RF and Cryogenics Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China University of Chinese Academy of Sciences Beijing100049 China

World’s first 1.3 GHz cryomodule containing eight 9-cell superconducting radio-frequency (RF) cavities treated by medium-temperature furnace baking (mid-T bake) was developed, assembled and tested at IHEP for the Dalian Advanced Light Source (DALS) and CEPC R&D. The 9-cell cavities in the cryomodule achieved an unprecedented highest average Q0 of 3.8 × 1010 at 16 MV/m and 3.6 × 1010 at 21 MV/m in the horizontal test. The cryomodule can operate stably up to a total CW RF voltage greater than 191 MV, with an average cavity CW accelerating gradient of more than 23 MV/m. The results significantly exceed the specifications of CEPC, DALS and the other high repetition rate free electron laser facilities (LCLS-II, LCLS-II-HE, SHINE, S3FEL). There is evidence that the mid-T bake cavity may not require fast cool-down or long processing time in the cryomodule. This paper reviews the cryomodule performance and discusses some important issues in cryomodule assembly and testing. © 2023, CC BY.

关键词： Free electron lasers

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Analysis of heart rate variation and foetal quiet sleep cycle correlation for normal and suspicious foetuses

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BIOTECHNOLOGY & BIOTECHNOLOGICAL EQUIPMENT 2018年第4期32卷 988-992页

作者： Li, Guangfei Zhang, song Yang, Lin Li, Shufang Wang, Yan Zhao, Yangyu Yang, Yimin Hao, Dongmei Li, xuwen Zhang, Lei Xu, Mingzhou Beijing Univ Technol Coll Life Sci & Bioengn Beijing Peoples R China Peking Univ Hosp 3 Obstet & Gynecol Beijing Peoples R China Beijing Yes Med Devices Co Ltd Beijing Peoples R China Beijing Aerosp Changfeng Co Ltd Beijing Peoples R China

Cardiotocography (CTG) is the basic method of monitoring foetal condition in the perinatal period. However, due to the limited insight into the CTG generation mechanism, some CTG recordings can be mistreated as a predictor of neonatal asphyxia, leading to a wrong assessment of the foetal status and improper obstetric intervention. Therefore, in case of suspicious CTG indications, a reliable verification of the true foetal status is vital for reducing the clinical diagnosis false-positive rate and avoiding the unnecessary obstetrician intervention. The paper presents the results obtained for 44 foetuses on the shares of three heart rate variation (HRV) ranges and quiet sleep cycles. This approach uses the parameters of the HRV range shares and quiet sleep cycles to analyse different types of foetuses. The results obtained show that most parameters reveal significant differences between normal and suspicious groups. This is quite lucrative for defining a set of coefficients, whose incorporation into a classifier will improve the accuracy of distinguishing the normal foetuses from suspicious ones.

关键词： Foetal heart rate foetal quiet sleep HRV range share

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Effect of Organic Fertilizer on Aquaculture Water Quality and Tilapia Production

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Agricultural Biotechnology 2019年第5期8卷 92-98页

作者： Shunlong MENG Xi Chen Dandan LI Liping QIU Gengdong HU Limin FAN Chao song Yao ZHENG Wei WU Jiazhang CHEN xuwen BING Freshwater Fisheries Research Center Chinese Academy of Fishery Sciences/Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Yangtze RiverMinistry of Agriculture/Key Laboratory of Fishery Eco-environment Assessment and Resource Conservation in Middle and Lower Reaches of the Yangtze RiverChinese Academy of Fishery SciencesWuxi 214081China Wuxi Fishery College Nanjing Agricultural UniversityWuxi 214081China

A two-month trial was carried out in China to evaluate the possibility of recycling animal manure through pond tilapia *** the effects of chicken manure,cattle manure and chicken-cattle mixture together on the water quality and tilapia production were *** results showed that the yield of tilapia was 3.46,3.89,2.49 and 3.20 kg in the control,chicken M,cattle M,and chicken-cattle M,respectively,and the tilapia yields following the order of chicken M>control>chicken-cattle M>cattle *** tilapia yield in chicken M group increased by 12.43% compared with the *** manure could increase the tilapia production,but cattle manure has no the *** the effect of animal manure on water quality showed that adding chicken manure into tilapia pond could make water quality decreased at the beginning 20 d,but could increase water quality after 20 d and stabilize the phytoplankton structure.

关键词： Chicken manure Cattle manure Tilapia production Water quality Aquaculture

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运用多层螺旋CT探讨第一对角支斑块形成的危险因素

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中华介入放射学电子杂志 2021年第2期9卷 200-203页

作者：陈松谭文斌张慈慈段丽霞熊玉超刘雅慧曾旭文暨南大学附属广州红十字会医院放射科广东广州510220 仁伯爵综合医院影像科澳门999078

目的运用多层螺旋CT探讨第一对角支开口处斑块形成的危险因素。方法收集我院2017年5月至2020年5月同时行冠状动脉CT血管造影(CCTA)和冠状动脉造影的冠心病患者共94例,48例第一对角支开口处有斑块为观察组,46例第一对角支开口处无斑块为... 详细信息

目的运用多层螺旋CT探讨第一对角支开口处斑块形成的危险因素。方法收集我院2017年5月至2020年5月同时行冠状动脉CT血管造影(CCTA)和冠状动脉造影的冠心病患者共94例,48例第一对角支开口处有斑块为观察组,46例第一对角支开口处无斑块为对照组。分析两组的血压、前降支狭窄程度和血流速度、前降支与第一对角支夹角的差异,并分析上述因素对第一对角支斑块形成的影响。结果两组间的血压、前降支狭窄程度和血流速度、前降支与第一对角支夹角的差异具有统计学意义(P<0.05),前降支狭窄程度和血压是第一对角支开口处形成斑块的危险因素,其OR值分别为1.030、1.128。结论血压及前降支的狭窄程度是第一对角支斑块形成的危险因素,且随着血压的增高,前降支狭窄程度的增大,第一对角支开口处斑块的发生率增加。

关键词：多层螺旋CT 冠心病对角支斑块

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基于Ecopath评估蟹-稻复合生态系统营养结构和能量流动

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生态学报 2020年第14期40卷 4852-4862页

作者：汪倩胡庚东宋超李丹丹郑尧裘丽萍范立明孟顺龙陈家长邴旭文中国水产科学研究院淡水渔业研究中心无锡214081 中国水产科学研究院内陆渔业生态环境和资源重点开放实验室无锡214081 农业农村部长江下游渔业生态环境监测中心无锡214081 南京农业大学无锡渔业学院无锡214081

蟹-稻综合种养模式为我国水产养殖以及农业从单一经营转变为复合经营提供了一种新模式,为了促进蟹-稻共作模式的推广和普及,应用Ecopath生态通道模型对该系统进行了营养结构和能量流动的分析。研究结果表明蟹-稻共作生态系统的最高营养... 详细信息

蟹-稻综合种养模式为我国水产养殖以及农业从单一经营转变为复合经营提供了一种新模式,为了促进蟹-稻共作模式的推广和普及,应用Ecopath生态通道模型对该系统进行了营养结构和能量流动的分析。研究结果表明蟹-稻共作生态系统的最高营养级(3.140)高于稻田单作系统的最高营养级(2.676),生态系统的能量流动主要有两条途径,即以沉水植物和其他维管束植物为起点的牧食链及以碎屑为起点的腐质链;蟹-稻共作农田生态系统在6月和10月的Finn′s循环指数(Finn′s cycling index,FCI,0.55和1)和Finn′s循环平均能流路径长度(Finn′s cycling mean path length,FCL,2.066和2.077),稻田单作农田生态系统在6月和10月的FCI(1.14和0.81)和FCL(2.089和2.137),说明蟹-稻共作模式可以形成一个稳定的生态系统,中华绒螯蟹的加入可以促进该完整的生态系统的能量流动,且随着螃蟹的成长,系统成熟度有所提高,只是较单作系统的成熟度低,共作系统有更大的成熟空间;蟹-稻共作农田生态系统在6月和10月的连接指数(Connectance index,CI)分别为0.135和0.135,稻田单作系统在6月和10月的CI为0.188和0.161,共作系统的各功能组之间的连接强度较单作系统弱,稳定程度相对较低,蟹-稻共作农田生态系统的初级生产力显著高于单作农田生态系统,且蟹-稻共作农田生态系统的发育良好。

关键词：生态通道模型蟹-稻复合生态系统营养结构能量流动

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Charge Transfer Platform and Catalytic Amplification of Phenanthroimidazole Derivative: A New Strategy for DNA Bases Recognition

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ANALYTICAL CHEMISTRY 2019年第18期91卷 11938-11945页

作者： Lu, Nannan Liu, He Huang, Rui Gu, Yue Yan, Xiaoyi Zhang, Tinging Xu, Zhiqian Xu, Haixin Xing, Yue song, Yu Li, xuwen Zhang, Zhiquan Jilin Univ Coll Chem Changchun 130012 Jilin Peoples R China

Research about DNA composition has been concentrated on DNA damage in the past few decades. However, it still remains a great challenge to construct a rapid, facile, and accurate approach for simultaneously monitoring four DNA bases, guanine (G), adenine (A), thymine (T), and cytosine (C). Herein, a novel electrochemical sensor based on phenanthroimidazole derivative, 2-(4-bromophenyl)-1-phenyl-1H-phenanthro[9,10-d]-imidazole (PPI), is successfully fabricated by a simple electrochemical method. The bromophenyl group in PI could expand their aromatic plane, induce the pi-conjugated extension, and enhance the charge transfer and pi-pi interaction. The phenyl group at N1 position could regulate the intermolecular interaction, which could promote the possibility of intermolecular connection. The PPI polymer (poly(PPI)) with pi-electron enriched conjugation architecture has been applied in simultaneous determination of G, A, T, and C in neutral solution by square wave voltammetry (SWV) method with well-separated peak potentials at 0.714, 1.004, 1.177, and 1.353 V, respectively. The sensor functionalized with poly(PPI) exhibits wide linear response for G, A, T, and C in the concentration ranges of 3-300, 1-300, 30-800, and 20-750 mu M, respectively. With favorable selectivity, stability, and reproducibility, the sensor is successfully utilized to monitor four DNA bases in real samples, displaying a promising prospect for electrochemical sensing devices.

关键词： Cytosine Genetics Electrodes Oxidation Acid and base chemistry

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Factors associated with blooms of cyanobacteria in a large shallow lake, China

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ENVIRONMENTAL SCIENCES EUROPE 2018年第1期30卷 1-15页

作者： Li, Di Wu, Naicheng Tang, song Su, Guanyong Li, xuwen Zhang, Yong Wang, Guoxiang Zhang, Junyi Liu, Hongling Hecker, Markus Giesy, John P. Yu, Hongxia Nanjing Univ Sch Environm State Key Lab Pollut Control & Resource Reuse Nanjing 210046 Jiangsu Peoples R China Jiangsu Environm Monitoring Ctr Nanjing 210036 Jiangsu Peoples R China Univ Kiel Dept Hydrol & Water Resources Management D-24118 Kiel Germany Chinese Ctr Dis Control & Prevent Natl Inst Environm Hlth Beijing 100021 Peoples R China Nanjing Univ Sci & Technol Sch Environm & Biol Engn Jiangsu Key Lab Chem Pollut Control & Resources R Nanjing 210094 Jiangsu Peoples R China Nanjing Normal Univ Sch Environm Nanjing 210023 Jiangsu Peoples R China Wuxi Environm Monitoring Ctr Wuxi 214000 Jiangsu Peoples R China Univ Saskatchewan Toxicol Ctr Saskatoon SK S7N 5B3 Canada Univ Saskatchewan Sch Environm & Sustainabil Saskatoon SK S7N 5C3 Canada Univ Saskatchewan Dept Vet Biomed Sci Saskatoon SK S7N 5B3 Canada Univ Saskatchewan Toxicol Ctr Saskatoon SK S7N 5B3 Canada Michigan State Univ Dept Zool E Lansing MI 48824 USA Michigan State Univ Ctr Integrat Toxicol E Lansing MI 48824 USA Univ Hong Kong Sch Biol Sci Hong Kong Hong Kong Peoples R China

Background: Eutrophication of freshwater systems can result in blooms of phytoplankton, in many cases cyanobacteria. This can lead to shifts in structure and functions of phytoplankton communities adversely affecting the quality of drinking water sources, which in turn impairs public health. Relationships between structures of phytoplankton communities and concentrations of the toxicant, microcystin-leucine-arginine (MC-LR), have not been well examined in large shallow lakes. The present study investigated phytoplankton communities at seven locations from January to December of 2015 in Tai Lake, and relationships between structures and diversities of phytoplankton communities and water quality parameters, including concentrations of MC-LR and metals, were analyzed. Results: A total of 124 taxa of phytoplankton were observed, and the predominant taxa were Microcystis sp. and Dolichospermum flos-aquae of Cyanophyta and Planctonema sp. of Chlorophyta. The greatest diversities of phytoplankton communities, as indicated by species richness, Simpson, Shannon-Wiener, the Berger and Parker, and the Pielou evenness indices, were observed in spring. Furthermore, productivity of phytoplankton was significantly and negatively correlated with diversities. These results demonstrated that Simpson, Shannon-Wiener, the Berger and Parker, and the Pielou evenness indices of phytoplankton communities were significantly related to trophic status and overall primary productivity in Tai Lake. In addition, temperature of surface water, pH, permanganate index, biochemical oxygen demand, total phosphorus, arsenic, total nitrogen/total phosphorous ratio, and MC-LR were the main factors associated with structures of phytoplankton communities in Tai Lake. Conclusion: The present study provided helpful information on phytoplankton community structure and diversity in Tai Lake from January to December of 2015. Our findings demonstrated that Simpson, Shannon-Wiener, the Berger and Parker, and the

关键词： Eutrophication Nutrients Phosphorus Nitrogen Phytoplankton productivity Diversity Microcystin-LR

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Medium-temperature furnace bake of superconducting radio-frequency cavities at ihep

arXiv

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arXiv 2020年

作者： He, Feisi Pan, Weimin Sha, Peng Zhai, Jiyuan Mi, Zhenghui Dai, xuwen Jin, song Zhang, Zhanjun Dong, Chao Liu, Baiqi Zhao, Hui Ge, Rui Zhao, Jianbing Mu, Zhihui Du, Lei Sun, Liangrui Zhang, Liang Yang, Conglai Zheng, Xiaobing Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Key Laboratory of Particle Acceleration Physics & Technology Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Center for Superconducting RF and Cryogenics Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China University of Chinese Academy of Sciences Beijing100049 China

Recently, heat treatment between 250 °C and 500 °C has been attempted to improve quality factor (Q) of superconducting radio-frequency cavities at FNAL and KEK. Experiments of such medium temperature (mid-T) bake with furnaces have also been carried out at IHEP. Firstly, over ten 1.3 GHz 1-cell cavities were treated with different temperatures at a small furnace, which all demonstrated improvement of Q and anti-Q-slope phenomenon. The average quality factor has reached 3.6×1010 when the gradient is 16 MV/m，while the highest Q is 4.9×1010@16MV/m;the maximum gradients of these 1-cell cavities are between 25.1 and 36.9 MV/m. Then, the recipe of mid-T furnace bake at 300 °C for 3 hours has been applied to six 1.3 GHz 9-cell cavities at a new big furnace, which have all shown higher Q and anti-Q-slope at medium field (16~24 MV/m). The average quality factor has reached 3.8×1010 when the gradient is 16 MV/m. The maximum gradients of the 9-cell cavities are between 22.7 and 26.5 MV/m. © 2020, CC0.

关键词： Radio waves

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Research of An off-Policy BF Optimization Aloorithm Based on Cross-Entroropy Method

Research of An off-Policy BF Optimization Aloorithm Based on...

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World Automation Congress (WAC) on Emerging Technologies for a New Paradigm in System of Systems Engineering

作者： Fu, Yuchen song, xuwen Suzhou Ind Pk Inst Serv Outsourcing Dept Informat Technol Suzhou Peoples R China Soochow Univ Sch Comp Sci & Technol Suzhou Peoples R China

ISBN: (纸本)9781889335490

In the reinforcement leaning task, the off-policy algorithms which approximately evaluate the values of states faced with the problem of high evaluation error and were sensitive to the distribution of behavior policy. In order to solve these problems, the basis function optimization method under the off-policy scenario was proposed. The algorithm set the Bellman error of the target policy which was computed with off-policy prediction algorithms as the objective function, then adjust the placement and shape of the basis functions in cooperate with the method of cross-entropy optimization. The experimental results on the grid world show that the algorithm effectively reduced the evaluation error and improved the approximation. Additionally, the algorithm could be easily extended to the problems of large state spaces.

关键词： off-policy learning basis function optimization cross-entropy optimization

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Effects of dietary resveratrol supplementation on hepatic and serum pro-/anti-inflammatory activity in juvenile GIFT tilapia, Oreochromis niloticus

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DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2017年 73卷 220-228页

作者： Zheng, Yao Zhao, Zhixiang Wu, Wei song, Chao Meng, Shunlong Fan, Limin Bing, xuwen Chen, Jiazhang Chinese Acad Fishery Sci Freshwater Fisheries Res Ctr Minist Agr Sci Observing & Expt Stn Fishery Resources & Envi Wuxi 214081 Jiangsu Peoples R China Nanjing Agr Univ Wuxi Fishery Coll Wuxi 214081 Jiangsu Peoples R China

Dietary resveratrol (RES) supplementation may have some pharmacological effects including anti inflammation. Previous studies have shown that Kupffer cell activation and apoptosis induction increases the transcription of pro- and anti-inflammatory cytokines. The main purpose of this study was to investigate the pro- and anti-inflammatory activities of 0.1 or 0.3 g/kg RES as a dietary supplement in juvenile freshwater tilapia (Oreochromis niloticus). The results showed that hepatic and serum immunoglobulin M (IgM) significantly decreased and increased while anti- and pro-inflammatory cytokines significantly increased and decreased, respectively, in the RES-treated groups. The expression of serum and hepatic IgM and anti-inflammatory cytokines [interleukin (IL)-10] and its inverse inhibitor interferon (IFN)-gamma significantly increased while pro-inflammatory cytokine transcription significantly decreased. Hematoxylin-eosin staining and scanning electron microscopy revealed intestinal deformation, irregular goblet cells, and apoptotic cells in the 03 g/kg RES groups. RES (0.3 g/kg) also induced necrosis, apoptosis, reduction in Kupffer cell number, compressed sinusoids, and deformation of epidermal cells in the liver of the treated groups. In conclusion, the results of the present study show that high doses of RES were absorbed in the gut and then damaged the liver and intestinal tissue. (C) 2017 Published by Elsevier Ltd.

关键词： Resveratrol Inflammatory cytokine Gene expression Apoptosis GIFT tilapia

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