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Design and Implementation of On-Line Hot Topic Discovery Model

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Wuhan University Journal of Natural Sciences 2006年第1期11卷 21-26页

作者： YE Hui-min CHENG wei dai Guan-zhong School of Automatic Control Northwestern Polyteehnieal University Xi＇an 710072 Shaanxi China Institute of Artificial Intelligence Beijing City University Beijing 100083 China

Internet has become a major medium for infomation transmission, how to detect hot topic on web, track the event development and forecast emergency is important to many fields, particularly to some government departments. On the basis of the researches in the field of topic detection and tracking, we propose a model for hot topic discovery that will pick out hot topics by automatically detecting, clustering and weighting topics on the websites within a time period. Based on the idea of stock index, we also introduce a topic index approach in following the growth of topics, which is useful to analyze and forecast the development of topics on web.

关键词： topic tracking stock index hot topic topic weight

Energy-efficient trajectory planning and resource allocation in UAV communication networks under imperfect channel prediction

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Science China(Information Sciences) 2022年第12期65卷 248-262页

作者： min SHENG Chenxi ZHAO Junyu LIU wei TENG Yanpeng dai Jiandong LI State Key Laboratory of ISN Xidian University

In unmanned aerial vehicle(UAV) communication networks, trajectory planning and resource allocation(TPRA) under channel prediction obtains great attention due to its significant energy-saving of UAVs and user quality of service(QoS) gains. These potentials are primarily demonstrated under the assumption of perfect channel prediction. However, due to the rapid-varying features of air-to-ground channels,it is difficult to avoid the random channel prediction error(CPE), which may deteriorate the performance of TPRA. In this paper, we investigate the problem of energy-efficient TPRA considering random CPE. The problem is formulated as a mixed-integer non-convex optimization with chance constraints, which ensures that QoS is robust to random CPE. To solve it, we first transform the chance constraints into deterministic forms, which are further proved to be convex constraints by using the characteristic of quasiconvex ***, we design a modified successive convex approximation algorithm to iteratively achieve the optimal solution. To cater to the high-speed movement of UAVs, a low-complexity heuristic online algorithm is tailored. Specifically, we first relax the QoS constraints to find a feasible initial point and iteratively tighten the lower bound of QoS constraints to obtain a suboptimal solution. Simulation results show that the proposed algorithm can improve energy efficiency compared with the algorithm without prediction.

关键词： UAV communication networks trajectory planning resource allocation channel prediction

Establishment of an avian leukosis virus subgroup A-resistant cell line

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Journal of Integrative Agriculture 2017年第4期16卷 930-936页

作者： FENG min dai Man-man LIAO ming CAO wei-sheng College of Veterinary Medicine South China Agricultural University Guangzhou 510642 P.R.China National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control Guangzhou 510642 P.R.China Key Laboratory of Veterinary Vaccine Innovation Ministry of Agriculture Guangzhou 510642 P.R.China Key Laboratory of Zoonosis Prevention and Control of Guangdong Province Guangzhou 510642 P.R. China

Rapid diagnostic methods for classifying avian leukosis subgroups in the field were needed for routine, large-scale screening. As a first step in method development, we inserted the avian leukosis virus subgroup A （ALV-A） env gene into plasmid pcDNA3.1/Zeo （＋） and used this construct to transfect DF-1 cells. Zeocin-resistant cells were obtained after 2 weeks of zeocin selection. Then, the cells were analyzed using PCR, immunofluorescence, and Western blot for expression of the envA-encoded envelope protein after 30 serial passages. The DF-1/A cell line was completely resistant to 104 TCIDso/0.1 mL （50% tissue culture infective dose）ALV-A and was partially resistant to 10~ TCIDs0/0.1 mL ALV-A viral particles. By comparing the DF-1/A and DF-1 cell lines, an ALV-A isolate was identified using a gag-specific ELISAfor capsid protein p27. Thus, we established a DF-1/A cell line that was resistant to ALV-A infection. This cell line will be useful as a diagnostic tool.

关键词： avian leukosis virus subgroup A (ALV-A) env DF-1/A cell line diagnostic tool

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测定水稻硅含量的一种简易方法

中国水稻科学 2005年第5期19卷 460-462页

作者：戴伟民张克勤段彬伍孙成效郑康乐蔡润庄杰云中国水稻研究所国家水稻改良中心/水稻生物学国家重点实验室浙江杭州310006 中国水稻研究所农业部稻米及制品质量监督检验测试中心浙江杭州310006 上海交通大学植物科学系上海201101

介绍了一种简易的测量水稻硅含量的方法,其主要特点为准确、方便、能批量化测定水稻硅含量。以珍汕97B/密阳46重组自交系群体,两次重复,共498个株系的谷壳、剑叶和茎秆为材料,验证了该方法的可靠性。每份材料测定2份样品,两次测定结果... 详细信息

介绍了一种简易的测量水稻硅含量的方法,其主要特点为准确、方便、能批量化测定水稻硅含量。以珍汕97B/密阳46重组自交系群体,两次重复,共498个株系的谷壳、剑叶和茎秆为材料,验证了该方法的可靠性。每份材料测定2份样品,两次测定结果达极显著正相关(P<0.01),线性相关系数分别为0.97954、0.97026和0.98848。取10份代表性样品进行了高温碱熔解法的测定,两种方法测定结果高度一致,r=0.9993。

关键词：水稻硅含量测定方法

Energy-efficient Approach to minimizing the Energy Consumption in An Extended Job-shop Scheduling Problem

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Chinese Journal of Mechanical Engineering 2015年第5期28卷 1048-1055页

作者： TANG Dunbing dai min College of Mechanical and Electrical Engineering Nanjing University of Aeronautics & Astronautics Jiangsu Key Laboratory of Precision and Micro-manufacturing Technology Nanjing University of Aeronautics & Astronautics

The traditional production planning and scheduling problems consider performance indicators like time, cost and quality as optimization objectives in manufacturing processes. However, environmentally-friendly factors like energy consumption of production have not been completely taken into consideration. Against this background, this paper addresses an approach to modify a given schedule generated by a production plarming and scheduling system in a job shop floor, where machine tools can work at different cutting speeds. It can adjust the cutting speeds of the operations while keeping the original assignment and processing sequence of operations of each job fixed in order to obtain energy savings. First, the proposed approach, based on a mixed integer programming mathematical model, changes the total idle time of the given schedule to minimize energy consumption in the job shop floor while accepting the optimal solution of the scheduling objective, makespan. Then, a genetic-simulated annealing algorithm is used to explore the optimal solution due to the fact that the problem is strongly NP-hard. Finally, the effectiveness of the approach is performed small- and large-size instances, respectively. The experimental results show that the approach can save 5%-10% of the average energy consumption while accepting the optimal solution of the makespan in small-size instances. In addition, the average maximum energy saving ratio can reach to 13%. And it can save approximately 1%-4% of the average energy consumption and approximately 2.4% of the average maximum energy while accepting the near-optimal solution of the makespan in large-size instances. The proposed research provides an interesting point to explore an energy-aware schedule optimization for a traditional production planning and scheduling problem.

关键词： energy consumption makespan production planning and scheduling job-shop floor different cutting speeds

水稻基部伸长节间性状与倒伏相关性分析及QTL定位

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作物学报 2005年第6期31卷 712-717页

作者：张秋英欧阳由男戴伟民禹盛苗庄杰云金千瑜程式华中国水稻研究所水稻生物学国家重点实验室国家水稻改良中心浙江杭州310006

利用珍汕97B密阳46RILs群体及其构建的连锁图谱,对水稻株高和基部Ⅰ、Ⅱ伸长节间性状与稻株抗倒伏能力进行相关分析,并对基部Ⅰ、Ⅱ伸长节间性状进行QTL定位,共检测到加性效应QTLs16个、加性×加性互作33对。估算了每个QTL的加性效应值... 详细信息

利用珍汕97B密阳46RILs群体及其构建的连锁图谱,对水稻株高和基部Ⅰ、Ⅱ伸长节间性状与稻株抗倒伏能力进行相关分析,并对基部Ⅰ、Ⅱ伸长节间性状进行QTL定位,共检测到加性效应QTLs16个、加性×加性互作33对。估算了每个QTL的加性效应值和每对加加互作的上位性效应值,比较了QTLs的基因组分布。在第1染色体短臂和第6染色体短臂等基因组区域,在相同或相近区间检测到控制相关性状的多个QTLs,其中以第6染色体短臂RM197RZ516区间尤为突出,所检测到的QTLs影响除第Ⅱ伸长节间长以外的其余6个性状。

关键词：水稻抗倒伏能力基部节间数量性状位点

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武警应急救护所装备研制

医疗卫生装备 2006年第9期27卷 20-21页

作者：杨希忠张咏刘福东闫青昌戴卫民武警部队后勤部卫生部北京市100089 武警北京市总队后勤部卫生处北京市100027

武警应急救护所装备是基于职能任务需要,依据战时卫勤保障理论,借鉴国外反恐斗争经验启示,应用现代医学科学技术和管理体系而研制的。实现了系列化、模块化和机动化。主要从研制背景、系统结构、性能特点3个方面介绍应急救护所装备概况。

关键词：救护所卫生装备卫勤保障

Optimization of an Artificial Intelligence Database and Camera Installation for Recognition of Risky Passenger Behavior in Railway Vehicles

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Computers, Materials & Continua 2025年第1期82卷 1277-1293页

作者： min-kyeong Kim Yeong Geol Lee Won-Hee Park Su-hwan Yun Tae-Soon Kwon Duckhee Lee Railroad Test&Certification Division Korea Railroad Research Institute(KRRI)Cheoldo BangmulgwanroUiwang-si16105Republic of Korea Railroad Safety Division Korea Railroad Research Institute(KRRI)Cheoldo BangmulgwanroUiwang-si16105Republic of Korea

Urban railways are vital means of public transportation in *** than 30%of metropolitan residents use the railways,and this proportion is expected to *** enhance safety,the government has mandated the installation of closed-circuit televisions in all carriages by ***,cameras still monitored *** address this limitation,we developed a dataset of risk factors and a smart detection system that enables an immediate response to any abnormal behavior and intensive monitoring *** created an innovative learning dataset that takes into account seven unique risk factors specific to Korean railway *** data collection was conducted across the Shinbundang Line of the Incheon Transportation Corporation,and the Ui-Shinseol *** observed several behavioral characteristics and assigned unique annotations to *** also considered carriage *** performance was evaluated by camera placement and *** the camera installation plan was *** dataset will find immediate applications in domestic railway *** artificial intelligence algorithms will be verified shortly.

关键词： AI railway vehicle risk factor smart detection AI training data

Small extracellular vesicles derived from human induced pluripotent stem cell-differentiated neural progenitor cells mitigate retinal ganglion cell degeneration in a mouse model of optic nerve injury

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Neural Regeneration Research 2025年第2期20卷 587-597页

作者： Tong Li Hui-min Xing Hai-Dong Qian Qiao Gao Sheng-Lan Xu Hua Ma Zai-Long Chi State Key Laboratory of Ophthalmology Optometry and Visual ScienceEye HospitalWenzhou Medical UniversityWenzhouZhejiang ProvinceChina National Clinical Research Center for Ocular Diseases Eye HospitalWenzhou Medical UniversityWenzhouZhejiang ProvinceChina

Several studies have found that transplantation of neural progenitor cells(NPCs)promotes the survival of injured ***,a poor integration rate and high risk of tumorigenicity after cell transplantation limits their clinical *** extracellular vesicles(sEVs)contain bioactive molecules for neuronal protection and *** studies have shown that stem/progenitor cell-derived sEVs can promote neuronal survival and recovery of neurological function in neurodegenerative eye diseases and other eye *** this study,we intravitreally transplanted sEVs derived from human induced pluripotent stem cells(hiPSCs)and hiPSCs-differentiated NPCs(hiPSC-NPC)in a mouse model of optic nerve *** results show that these intravitreally injected sEVs were ingested by retinal cells,especially those localized in the ganglion cell *** with hiPSC-NPC-derived sEVs mitigated optic nerve crush-induced retinal ganglion cell degeneration,and regulated the retinal microenvironment by inhibiting excessive activation of *** analysis further revealed that hiPSC-NPC derived sEVs transported neuroprotective and anti-inflammatory miRNA cargos to target cells,which had protective effects on RGCs after optic nerve *** findings suggest that sEVs derived from hiPSC-NPC are a promising cell-free therapeutic strategy for optic neuropathy.

关键词： exosome miRNA neural progenitor cell neurodegeneration neuroinflammation neuroprotection optic nerve crush optic neuropathy retinal ganglion cell small extracellular vesicles