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An intelligent prediction model of epidemic characters based on multi-feature

CAAI Transactions on Intelligence Technology 2024年第3期9卷 595-607页

作者： Xiaoying Wang Chunmei Li Yilei Wang Lin Yin Qilin Zhou Rui Zheng Qingwu Wu Yuqi Zhou Min dai Information Center Third Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina School of Computer Science Qufu Normal UniversityRizhaoChina Department of Allergy Third Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou China 4Department of Otorhinolaryngology‐Head and Neck Surgery Third Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina Department of Pulmonary and Critical Care Medicine Third Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina Department of Traditional Chinese Medicine Third Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina

The epidemic characters of Omicron(***-scale transmission)are significantly different from the initial variants of *** data generated by large-scale transmission is important to predict the trend of epidemic ***,the re-sults of current prediction models are inaccurate since they are not closely combined with the actual situation of Omicron *** consequence,these inaccurate results have negative impacts on the process of the manufacturing and the service industry,for example,the production of masks and the recovery of the tourism *** authors have studied the epidemic characters in two ways,that is,investigation and ***,a large amount of data is collected by utilising the Baidu index and conduct questionnaire survey concerning epidemic ***,theβ-SEIDR model is established,where the population is classified as Susceptible,Exposed,Infected,Dead andβ-Recovered persons,to intelligently predict the epidemic characters of *** thatβ-Recovered persons denote that the Recovered persons may become Sus-ceptible persons with probabilityβ.The simulation results show that the model can accurately predict the epidemic characters.

关键词： artificial intelligence big data data analysis evaluation feature extraction intelligent information processing medical applications

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Protective effects on acute hypoxic-ischemic brain damage in mfat-1 transgenic mice by alleviating neuroinflammation

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The Journal of Biomedical Research 2021年第6期35卷 474-490页

作者： Xue Geng Meng Wang Yunjun Leng Lin Li Haiyuan Yang Yifan dai Ying Wang Jiangsu Key Laboratory of Xenotransplantation Nanjing Medical UniversityNanjingJiangsu 211166China Key Laboratory of Targeted Intervention of Cardiovascular Disease Collaborative Innovation Center for Cardiovascular Disease Translational MedicineNanjing Medical UniversityNanjingJiangsu 211166China.

Acute hypoxic-ischemic brain damage(HIBD)mainly occurs in adults as a result of perioperative cardiac arrest and *** benefits of n-3 polyunsaturated fatty acids(n-3 PUFAs)in maintaining brain growth and development are well ***,possible protective targets and underlying mechanisms of mfat-1 mice on HIBD require further *** mfat-1 transgenic mice exhibited protective effects on HIBD,as indicated by reduced infarct range and improved neurobehavioral ***-seq analysis showed that multiple pathways and targets were involved in this process,with the anti-inflammatory pathway as the most *** study has shown for the first time that mfat-1 has protective effects on HIBD in *** of a G protein-coupled receptor 120(GPR120)-related anti-inflammatory pathway may be associated with perioperative and postoperative complications,thus innovating clinical intervention strategy may potentially benefit patients with HIBD.

关键词： hypoxic-ischemic brain damage mfat-1 transgenic mice n-3 PUFAs RNA-seq neuroinflammation GPR120 receptor

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Diffusion tensor imaging of spinal microstructure in healthy adults： improved resolution with the readout segmentation of long variable echo-trains

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Neural Regeneration Research 2017年第12期12卷 2067-2070页

作者： Bu-tian Zhang Meng Li Li-li Yu Yi-meng dai Shao-nan Yu Jin-lan Jiang China-Japan Union Hospital of Jilin University Changchun Jilin Province China

Diffusion tensor imaging plays an important role in the accurate diagnosis and prognosis of spinal cord diseases. However, because of technical limitations, the imaging sequences used in this technique cannot reveal the fine structure of the spinal cord with precision. We used the readout segmentation of long variable echo-trains（RESOLVE） sequence in this cross-sectional study of 45 healthy volunteers aged 20 to 63 years. We found that the RESOLVE sequence significantly increased the resolution of the diffusion images and improved the median signal-to-noise ratio of the middle（C4–6） and lower（C7–T1） cervical segments to the level of the upper cervical segment. In addition, the values of fractional anisotropy and radial diffusivity were significantly higher in white matter than in gray matter. Our study verified that the RESOLVE sequence could improve resolution of diffusion tensor imaging in clinical applications and provide accurate baseline data for the diagnosis and treatment of cervical spinal cord diseases.

关键词： nerve regeneration diffusion tensor imaging cervical spinal cord microstructure gray matter white matter readout segmentationof long variable echo-train sequence signal-to-noise ratio fractional anisotropy neural regeneration

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Spray pyrolysis feasibility of tungsten substitution for cobalt in nickel-rich cathode materials

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International Journal of Minerals,Metallurgy and Materials 2024年第10期31卷 2244-2252页

作者： Zihan Hou Lisheng Guo Xianlong Fu Hongxian Zheng Yuqing dai Zhixing Wang Hui Duan Mingxia Dong Wenjie Peng Guochun Yan Jiexi Wang Key Laboratory of Value-added Metallurgy of Hunan Province Engineering Research Center of the Ministry of Education for Advanced Battery MaterialsSchool of Metallurgy and EnvironmentCentral South UniversityChangsha 410083China BASF Shanshan Battery Materials Co.Ltd. Changsha 410205China

Cobalt(Co)serves as a stabilizer in the lattice structure of high-capacity nickel(Ni)-rich cathode ***,its high cost and toxicity still limit its *** general,it is possible to perform transition metal substitution to reduce the Co ***,the traditional coprecipitation method cannot satisfy the requirements of multielement coprecipitation and uniform distribution of elements due to the differences between element concentration and deposition *** this work,spray pyrolysis was used to prepare LiNi_(0.9)Co_(0.1-x)W_(x)O_(2)(LNCW).In this regard,the pyrolysis behavior of ammonium metatungstate was analyzed,together with the substitu-tion of W for *** the possibility of spray pyrolysis,the Ni-Co-W-containing oxide precursor presents a homogeneous distribution of metal elements,which is beneficial for the uniform substitution of W in the final *** was observed that with W substitution,the size of primary particles decreased from 338.06 to 71.76 nm,and cation disordering was as low as 3.34%.As a consequence,the pre-pared LNCW exhibited significantly improved electrochemical *** optimal conditions,the lithium-ion battery assembled with LiNi_(0.9)Co_(0.0925)W_(0.0075)O_(2)(LNCW-0.75mol%)had an improved capacity retention of 82.7%after 200 cycles,which provides insight in-to the development of Ni-rich low-Co *** work presents that W can compensate for the loss caused by Co deficiency to a cer-tain extent.

关键词： lithium-ion batteries Ni-rich low-cobalt W substitution spray pyrolysis

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SISO动态矩阵控制的鲁棒稳定性条件

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自动化学报 2001年第3期27卷 367-370页

作者：戴连奎浙江大学工业控制技术国家重点实验室杭州310027

定量分析了单输入单输出 (SISO)动态矩阵控制系统的鲁棒稳定条件 ,采用脉冲响应模型簇来描述被控过程的不确定性 ,并讨论了基于脉冲响应模型 (FIR)的动态矩阵控制(DMC)算法 ;在此基础上 ,推导了

关键词：预测控制动态矩阵控制鲁棒稳定性 SISO MPC算法

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海上激光雷达强度-空间联合滤波方法

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中国激光 2023年第19期50卷 172-180页

作者：李正宇王鸿东魏圣哲楼建坤上海交通大学船舶海洋与建筑工程学院海洋智能装备与系统教育部重点实验室上海200240 上海交通大学船舶海洋与建筑工程学院海洋工程国家重点实验室上海200240

针对水面无人艇(USV)近距离海上实时目标检测时受海杂波影响严重的问题,结合海杂波空间分布特征和点云回波强度信息,提出了一种强度-空间联合过滤方法。该方法首先将点云按照距离做区域划分;接着对不同区域根据激光回波强度随距离的变... 详细信息

针对水面无人艇(USV)近距离海上实时目标检测时受海杂波影响严重的问题,结合海杂波空间分布特征和点云回波强度信息,提出了一种强度-空间联合过滤方法。该方法首先将点云按照距离做区域划分;接着对不同区域根据激光回波强度随距离的变化关系设置初始阈值,过滤原始点云低强度海杂波;然后对剩余的点云采取离群点滤波算法,过滤稀疏高强度海杂波,得到目标点云;最后提取离群点滤波中的空间离群点强度特征,对强度阈值滤波参数进行自适应修正。滤波方法在实船上进行了测试,实验结果表明相比于现有的全局激光回波强度阈值过滤方法,所提算法在性能上有明显提升,应用于聚类算法后其虚警率和漏警率分别平均降低了4.34%和10.47%,可以为无人艇航行避碰提供有力支撑。

关键词：遥感三维激光雷达水面无人艇海杂波离群点点云强度

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Identification of differentially expressed genes associated with bud dormancy release in tree peony(Paeonia suffruticosa) by suppression subtractive hybridization

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Forestry Studies in China 2008年第2期10卷 88-94页

作者： HUANG Xin ZHENG Guo-sheng dai Si-lan GAI Shu-peng College of Landscape Architecture Beijing Forestry University Beijing 100083 P. R. China College of Life Science Qingdao Agricultural University Qingdao 266109 P. R. China

A subtractive cDNA library was developed to study genes associated with bud dormancy release in tree peonies. In order to identify genes that are highly expressed in buds released from dormancy, 588 clones were examined by differential screening. Of these, 185 clones were selected to be sequenced. A total of 37 unique sequences were obtained of which only 31 sequences have matches in the NCBI database or the Arabidopsis thaliana protein database. Semi-quantitative RT-PCR was used to confirm further the expression profiles for 12 transcripts identified within the subtractive cDNA library. Gene ontology analyses indicated that many of the different genes identified have unknown or hypothetical functions while it is speculated that other genes play different mo- lecular roles. In our study, genes involved in bud dormancy release were growth-related or stress-responsive, while low-temperature-induced ribosomal proteins may also play a role in bud dormancy release. Our results provide interesting information for further understanding of the molecular mechanism of bud dormancy release in tree peonies.

关键词： cDNA clone dormancy subtractive hybridization tree peony (Paeonia suffruticosa)

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Activating Inert Sites in Cobalt Silicate Hydroxides for Oxygen Evolution through Atomically Doping

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Energy & Environmental Materials 2022年第2期5卷 655-661页

作者： Jiexin Zhu Lixue Xia Wenxuan Yang Ruohan Yu Wei Zhang Wen Luo Yuhang dai Wei Wei Liang Zhou Yan Zhao Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200China

Metal silicate hydroxides have been recognized as efficient oxygen evolution reaction(OER)electrocatalysts,yet tailoring of their intrinsic activity remains ***,Fe had been incorporated into cobalt silicate hydroxide nanosheets and the resulted material achieves a competitive OER catalytic *** is found that the doping state obviously affects the electrical transport ***,highly dispersed Fe atoms(low-concentration Fe doping)trigger slight electron transfer to Co atoms while serried Fe(highconcentration Fe doping)attract vast *** introducing 6 at.%Fe doping,partial relatively inert Co sites are activated by atomically dispersed Fe,bearing an optimal metal 3d electronic occupation and adsorption capacity to oxygen *** introduced Co-O-Fe unit trigger the p-donation effect and decrease the number of electrons in p*-antibonding orbitals,which enhance the Fe-O covalency and the structural *** a result,the sample delivers a low overpotential of 293 mV to achieve a current density of 10 mA cm^(-2).This work clarifies the superiority of atomically dispersed doping state,which is of fundamental interest to the design of doped catalyst.

关键词： atomically doping electrochemistry electron transfer metal silicate hydroxides oxygen evolution

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High Power Q-Switched Dual-End-Pumped Ho:YAG Laser

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Chinese Physics Letters 2012年第9期29卷 60-62页

作者： DUAN Xiao-Ming SHEN Ying-Jie dai Tong-Yu YAO Bao-Quan WANG Yue-Zhu National Key Laboratory of Tunable Laser Technology Harbin Institute of TechnologyHarbin 150001

We report the high power acousto-optically Q-switched operation of a dual-end-pumped Ho:YAG laser at room *** the Q-swithched mode,a maximum pulse energy of 2.4 mJ and a minimum pulse width of 23 ns at the repetition rate of 10 kHz are achieved,resulting in a peak power of 104.3 *** beam quality factor of M^(2)~1.5,which is demonstrated by a knife-edge *** addition,the Ho:YAG laser is employed as a pumping source of ZGP optical parametric oscillator,and its total average output power is 13.2 W at 3.9μm and 4.4μm with a slope efficiency of 68.4%.

关键词： temperature. pumped pumping

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Sub-nanosecond-speed frequency-reconfigurable photonic radio frequency switch using a silicon modulator

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Photonics Research 2020年第6期8卷 852-857页

作者： YIWEI XIE LEIMENG ZHUANG PENGCHENG JIAO DAOXIN dai Centre for Optical and Electromagnetic Research State Key Laboratory for Modern Optical InstrumentationZhejiang Provincial Key Laboratory for Sensing TechnologiesZhejiang UniversityHangzhou 310058China Institute of Port Coastal and Offshore EngineeringOcean CollegeZhejiang UniversityZhoushan 316021China Engineering Research Center of Oceanic Sensing Technology and Equipment Ministry of EducationZhejiang UniversityHangzhou 310000China

Radio frequency(RF)switches are essential for implementing routing of RF ***,the increasing demand for RF signal frequency and bandwidth is posing a challenge of switching speed to the conventional solutions,i.e,the capability of operating at a sub-.nanosecond speed or *** addition,signal frequency reconfigurability is also a desirable feature to facilitate new innovations of flexible system *** microwave photonics as an alter-native path,we present here a photonic implementation of an RF switch providing not only the capability of switching at a sub-nanosecond speed but also options of frequency doubling of the input RF signals,allowing for flexible output *** core device is a traveling wave silicon modulator with a device size of0.2 mm × 1.8 mm and a modu-lation bandwidth of 10 *** microwave frequencies,i.e.,15 GHz and 20 GHz,as two simultaneous RF input signals,we experimentally demonstrated their amplitude and frequency switching as well as that of the doubled frequencies,ie,30 GHz and 40 GHz,at a switching frequency of 5 *** results of this work point to a solution for creating high speed RF switches with high compactness and flexibility.

关键词： modulator microwave doubling

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