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计算机与数字工程 2023年第12期51卷 3020-3027页

作者：李建华陈聪赵旭雯西安科技大学机械工程学院西安710054

生鲜农产品不易储存、易腐性要求科学制定物流模式与路径,以最大程度保障产品鲜活度。针对取货车辆到达生鲜农产品供应商的不准时与物流费用高的问题,提出基于Milk-Run的生鲜农产品物流优化方法。依据生鲜农产品物流的构成,引入Milk-Ru... 详细信息

生鲜农产品不易储存、易腐性要求科学制定物流模式与路径,以最大程度保障产品鲜活度。针对取货车辆到达生鲜农产品供应商的不准时与物流费用高的问题,提出基于Milk-Run的生鲜农产品物流优化方法。依据生鲜农产品物流的构成,引入Milk-Run循环取货模式并给出最优取货期量确定方法。同时,为最大限度对企业成本、驾驶安全、客户需求和产品质量进行平衡与保障,综合考虑装载率、出车数量、疲劳驾驶、客户时间等因素构建多目标VRPTW模型,结合评价函数法与线性加权法对目标进行转换,设计了一种遗传算法求解模型,并引入栅格法测量各节点间实际配送距离。最后,结合实际物流问题,检验Milk-Run循环取货模式的可行性与优越性,通过仿真实验证明了文章提出的方法可以为企业的物流决策提供参考。

关键词： Milk-Run 循环取货 VRPTW问题疲劳驾驶遗传算法栅格法

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广州地区7种常用绿墙植物的抗旱性研究

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绿色科技 2019年第17期21卷 39-42,44页

作者：刘悦明孙苗苗李许文刘国锋余铭杰广州市林业和园林科学研究院/广州市景观建筑重点实验室

为筛选适合广州地区绿墙绿化种植的抗旱植物,以鸭脚木、锦竹芋、孔雀竹芋、绿萝、山菅兰、波士顿蕨、红背桂等7种常用的绿墙植物为实验材料,进行了抗旱性研究。通过实验表明:控水15 d后红背桂形态变化最明显,鸭脚木最不明显;7种植物的... 详细信息

为筛选适合广州地区绿墙绿化种植的抗旱植物,以鸭脚木、锦竹芋、孔雀竹芋、绿萝、山菅兰、波士顿蕨、红背桂等7种常用的绿墙植物为实验材料,进行了抗旱性研究。通过实验表明:控水15 d后红背桂形态变化最明显,鸭脚木最不明显;7种植物的土壤含水量下降都较明显,叶片含水量下降不明显;大部分植物叶绿素含量下降也较明显,初始荧光上升幅度不大,PSⅡ最大光化学量子效率只有红背桂下降幅度很大。通过隶属函数分析可将这些植物在绿墙应用中的抗旱性由强到弱排序为:绿萝>孔雀竹芋>鸭脚木>锦竹芋>波士顿蕨>山菅兰>红背桂。

关键词：绿墙植物抗旱性隶属函数

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平陆运河土石方多路径利用的基础问题与解决途径

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中国工程科学 2024年第1期26卷 251-262页

作者：肖建庄沈剑羽马少坤李卓峰段珍华程耀飞肖绪文广西大学土木建筑工程学院南宁530004 同济大学土木工程学院上海200092 广西大学双碳科学与技术研究院南宁530004 广西平陆运河建设有限公司南宁530022

平陆运河是西部地区陆海新通道骨干工程,其建设过程将产生涵盖23种岩土类型、成分杂且分布散的土石方约3.39×10^(8)m^(3),因而土石方资源化利用是建设平陆运河绿色工程的重要组成部分;正在实施的土石方利用途径以抬填造地为主(占50... 详细信息

平陆运河是西部地区陆海新通道骨干工程,其建设过程将产生涵盖23种岩土类型、成分杂且分布散的土石方约3.39×10^(8)m^(3),因而土石方资源化利用是建设平陆运河绿色工程的重要组成部分;正在实施的土石方利用途径以抬填造地为主(占50%以上),存在高品质的资源化利用率低、产品应用需求研究滞后、创新技术少、数字化程度低、碳排放评价缺失等基础问题,阻碍了平陆运河土石方的多路径高效利用。本文针对相关基础问题,着重从资源化、数字化、低碳化的角度出发,提出了平陆运河土石方利用创新解决途径:挖掘工程自身及周边地区的潜在应用需求,根据不同岩土的类型分别形成利用途径,实现多场景应用和多路径利用;构建开挖区土石方地质信息模型、土石方信息数据库等,形成土石方的数字化“挖-运-储-用”技术;建议针对多利用路径的碳排放进行生命周期评价,结合土石方数据库开展碳排放的动态评价,研发模块化移动式处置装备、原位利用技术以支持实现降本减碳。在平陆运河工程的现状基础上,资源化、数字化、低碳化的有机结合将为平陆运河绿色工程建设提供坚实支撑,也可为后续其他工程的土石方多路径利用提供技术参照。

关键词：平陆运河土石方多路径利用地质信息模型数据库碳排放

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抚顺西露天矿内矿物自燃防治技术研究

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中国矿业 2024年第S02期33卷 369-374页

作者：朱伟朱绪文李悦李星张丽霞卫颖哲杨丽娜中煤科工生态环境科技有限公司北京100013 山东深博巷道支护技术有限公司山东济南250000

针对抚顺西露天矿矿坑内自燃灾害频发并因此导致环境污染和生产安全的问题,现场取煤炭、油母页岩、干馏后油母页岩三种样品进行了实验室工业分析和高温程序升温实验,分别得到了工业分析成果和自燃过程中析出气体规律及放热特性,研究了... 详细信息

针对抚顺西露天矿矿坑内自燃灾害频发并因此导致环境污染和生产安全的问题,现场取煤炭、油母页岩、干馏后油母页岩三种样品进行了实验室工业分析和高温程序升温实验,分别得到了工业分析成果和自燃过程中析出气体规律及放热特性,研究了矿物自燃机理,提出了露天矿自燃监测方法和适宜的防治技术措施。结果表明,煤样品挥发分最高,达到42%,而油母页岩和干馏残渣灰分均超过75%。孔径分布表明各矿物样品大孔和介孔占比很大,易发生氧气吸附作用,从表观结构特征解释了矿物易于氧化自燃的原因。各样品氧化升温过程中易于析出碳氧化合物和碳氢类化合物,气体的成分及浓度与温度密切相关。矿物氧化升温过程放出热量,助推自热进一步发展至自燃。露天矿自燃不仅造成生态环境影响,同时破坏优质煤炭资源,降低边坡强度,可能进一步引发滑坡等地质灾害。自燃监测方面,可采取红外热成像系统,辅助同位素测氡和钻孔测温相结合精准圈定高温自热区和自燃区,从而选取适宜的防治措施进行精准治理,有效地控制了矿坑内自燃的发展,对类似矿山自燃精准防治提供了参考经验。

关键词：抚顺西露天矿矿物自燃特性氧化析出气体监测防治

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Identifying concepts from medical images via transfer learning and image retrieval

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MATHEMATICAL BIOSCIENCES AND ENGINEERING 2019年第4期16卷 1978-1991页

作者： Wang, xuwen Zhang, Yu Guo, Zhen li, Jiao Chinese Acad Med Sci Inst Med Informat & Lib Peking Union Med Coll Beijing 100020 Peoples R China

Automatically identifying semantic concepts from medical images provides multimodal insights for clinical research. To study the effectiveness of concept detection on large scale medical images, we reconstructed over 230,000 medical image-concepts pairs collected from the ImageCLEFcaption 2018 evaluation task. A transfer learning-based multi-label classification model was used to predict multiple high-frequency concepts for medical images. Semantically relevant concepts of visually similar medical images were identified by the image retrieval-based topic model. The results showed that the transfer learning method achieved F1 score of 0.1298, which was comparable with the state of art methods in the ImageCLEFcaption tasks. The image retrieval-based method contributed to the recall performance but reduced the overall F1 score, since the retrieval results of the search engine introduced irrelevant concepts. Although our proposed method achieved second-best performance in the concept detection subtask of ImageCLEFcaption 2018, there will be plenty of further work to improve the concept detection with better understanding the medical images.

关键词： concept detection transfer learning multi-label classification medical image retrieval LDA

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Machining-Reliability-based Optimization of Process Parameters for Marine Diesel Engine Block Hole System Using HJ-PSO

Research Square

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Research Square 2021年

作者： Zhou, Honggen Yang, Weibin Sun, li Jing, xuwen li, Guochao Cao, liping School of Mechanical Engineering Jiangsu University of Science and Technology Zhenjiang212000 China Shaanxi Diesel Engine Heavy Industry Company Limited Xingping713100 China

The processing quality of the block hole system affects the working performance of the marine diesel engine block directly. Choosing an appropriate combination of process parameters is a prerequisite to improve the accuracy of the block hole system. Uncertain fluctuations of process parameters during the machining process would affect the process reliability of the block hole system, resulting in an ultra-poor accuracy. For this reason, the RBF method is used to establish the relationship between the verticality of the cylinder hole and process parameters, including cutting speed, depth of cut, and feed rate. Taking the minimum cylinder hole verticality as the goal and setting the process reliability constraints of the cylinder hole based on Monte Carlo, a reliability optimization model of processing parameters for cylinder hole is established in this paper. Meanwhile, an improved particle swarm algorithm was designed to solve the model, and eventually, the global optimal combination of process parameters for the cylinder hole processing of the diesel engine block in the reliability stable region was obtained. © 2021, CC BY.

关键词： Reliability

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ECCParaCorp: a cross-lingual parallel corpus towards cancer education, dissemination and application

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BMC MEDICAL INFORMATICS AND DECISION MAKING 2020年第3期20卷 122-122页

作者： Ma, Hetong Yang, Feihong Ren, Jiansong li, Ni Dai, Min Wang, xuwen Fang, An li, Jiao Qian, Qing He, Jie Chinese Acad Med Sci & Peking Union Med Coll Inst Med Informat Lib Beijing Peoples R China Chinese Acad Med Sci & Peking Union Med Coll Off Canc Screening Natl Clin Res Ctr Canc Natl Canc CtrCanc Hosp Beijing 100021 Peoples R China Chinese Acad Med Sci & Peking Union Med Coll Dept Thorac Surg Natl Clin Res Ctr Canc Natl Canc CtrCanc Hosp Beijing Peoples R China

BackgroundThe increasing global cancer incidence corresponds to serious health impact in countries worldwide. Knowledge-powered health system in different languages would enhance clinicians' healthcare practice, patients' health management and public health literacy. High-quality corpus containing cancer information is the necessary foundation of cancer education. Massive non-structural information resources exist in clinical narratives, electronic health records (EHR) etc. They can only be used for training AI models after being transformed into structured corpus. However, the scarcity of multilingual cancer corpus limits the intelligent processing, such as machine translation in medical scenarios. Thus, we created the cancer specific cross-lingual corpus and open it to the public for academic *** to build an English-Chinese cancer parallel corpus, we developed a workflow of seven steps including data retrieval, data parsing, data processing, corpus implementation, assessment verification, corpus release, and application. We applied the workflow to a cross-lingual, comprehensive and authoritative cancer information resource, PDQ (Physician Data Query). We constructed, validated and released the parallel corpus named as ECCParaCorp, made it openly accessible *** proposed English-Chinese Cancer Parallel Corpus (ECCParaCorp) consists of 6685 aligned text pairs in Xml, Excel, Csv format, containing 5190 sentence pairs, 1083 phrase pairs and 412 word pairs, which involved information of 6 cancers including breast cancer, liver cancer, lung cancer, esophageal cancer, colorectal cancer, and stomach cancer, and 3 cancer themes containing cancer prevention, screening, and treatment. All data in the parallel corpus are online, available for users to browse and download (http://***/ECCParaCorp/).ConclusionsECCParaCorp is a parallel corpus focused on cancer in a cross-lingual form, which is openly accessible. It would make up the imbalan

关键词： Medical parallel corpus Cancer information Cross language Bilingual Cancer data HealthNLP

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The YDA-MKK4/MKK5-MPK3/MPK6 Cascade Functions Downstream of the RGF1-RGI ligand-Receptor Pair in Regulating Mitotic Activity in Root Apical Meristem

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Molecular Plant 2020年第11期13卷 1608-1623页

作者： Yiming Shao Xinxing Yu xuwen Xu Yong li Wenxin Yuan Yan Xu Chuanzao Mao Shuqun Zhang Juan Xu State Key Laboratory of Plant Physiology and Biochemistry College of Life SciencesZhejiang UniversityHangzhouZhejiang 310058China Division of Biochemistry University of MissouriColumbiaMO 65211USA Department of Molecular Cellular and Developmental BiologyYale UniversityNew HavenCT 06511USA

The mitotic activity of root apical meristem(RAM)is critical to primary root growth and *** studies have identified the roles of ROOT GROWTH FACTOR 1(RGF1),a peptide ligand,and its receptors,RGF1 INSENSITIVEs(RGIs),a clade of five leucine-rich-repeat receptor-like kinases,in promoting cell division in the RAM,which determines the primary root ***,the downstream signaling components remain *** this study,we identify a complete mitogen-activated protein kinase(MAPK or MPK)cascade,composed of YDA,MKK4/MKK5,and MPK3/MPK6,that functions downstream of the RGF1-RGI ligand-receptor *** to the rgi1/2/3/4/5 quintuple mutant,loss-of-function mutants of MPK3 and MPK6,MKK4 and MKK5,or YDA show a short-root phenotype,which is associated with reduced mitotic activity and lower expression of PLETHORA 1(PLT1)/PLT2 in the ***,MPK3/MPK6 activation in response to exogenous RGF1 treatment is impaired in the rgi1/2/3/4/5 quintuple,yda single,and mkk4 m kk5 double *** analyses demonstrated that the expression of constitutively active MKK4,MKK5,or YDA driven by the RGI2 promoter can rescue the short-root phenotype of the rgi1/2/3/4/5 *** together,these results suggest that the YDA-MKK4/MKK5-MPK3/MPK6 cascade functions downstream of the RGF1-RGI ligand-receptor pair and upstream of PLT1/PLT2 to modulate the stem cell population and primary root growth in Arabidopsis.

关键词： root meristem MPK3/MPK6 RGF1-RGIs PLT1/PLT2 signaling pathway Arabidopsis

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微藻处理城市污水反渗透浓水的条件优化

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环境工程学报 2023年第4期17卷 1365-1376页

作者：夏瑜常杰李沅珈王沛申欣宇胡怡然何绪文中国矿业大学(北京)化学与环境工程学院北京100083

城市污水回用是缓解水资源危机的有效措施。反渗透工艺是生产优质再生水的重要方法,但在实际应用过程中,25%~50%的城市污水会转化成反渗透浓水(ROC)。ROC的总氮(TN)、总磷(TP)和硬度离子(Ca2+、Mg2+)质量浓度等指标较高。利用微藻去除... 详细信息

城市污水回用是缓解水资源危机的有效措施。反渗透工艺是生产优质再生水的重要方法,但在实际应用过程中,25%~50%的城市污水会转化成反渗透浓水(ROC)。ROC的总氮(TN)、总磷(TP)和硬度离子(Ca2+、Mg2+)质量浓度等指标较高。利用微藻去除氮、磷和Ca2+、Mg2+是城市污水ROC处理的有效途径之一,且可实现资源回收,但目前对其应用条件的优化研究仍较少。利用微藻Scenedesmus sp. FACHB-1 574处理城市污水ROC,在不同总溶解性固体(TDS)质量浓度(1.35 g·L^(-1)和2.70 g·L^(-1))、光暗时间比(12 h/12 h、16 h/8 h、20 h/4 h、24 h/0 h)、光强(25μmol·m^(-2)·s^(-1)、50μmol·m^(-2)·s^(-1)、100μmol·m^(-2)·s^(-1))和氮磷质量比(107:1、14:1、7:1)的条件下,研究了微藻对污水的处理效果及其生长状况。结果表明,Scenedesmus sp. FACHB-1 574可适应城市污水ROC中TDS质量浓度为2.70 g·L^(-1)的条件;对TN的去除速率随光照时间和光强的增加而增大;氮磷质量比为14:1时微藻对TN的去除速率及微藻生物量等性能均得以强化。在最优处理条件下(光暗时间比20 h/4 h,光强100μmol·m^(-2)·s^(-1),氮磷质量比14:1)处理10 d后,微藻对城市污水ROC中TN和TP去除率分别为92.83%和99.68%,藻密度、质量浓度(干重)、脂质含量分别为23.62×10^(6)cells·mL^(-1)、1.10 g·L^(-1)、34.55%。随着微藻的生长,在无CO_(2)的条件下,废水的pH值从7.5升高到10.7,并可去除52.7%的Ca^(2+)和33.9%的Mg^(2+)。本研究可为微藻在城市污水处理及资源化工艺中的应用提供参考。

关键词：反渗透浓水微藻总溶解性固体光暗时间比光强氮磷质量比 Ca2+ Mg2+

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A novel method based on membrane distillation for treating acid mine drainage: Recovery of water and utilization of iron

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CHEMOSPHERE 2021年 279卷 130605-130605页

作者： Wang, Yuxiang Wang, Jianbing li, Zhongyi Wang, Huijiao He, xuwen Wang, Chunrong China Univ Min & Technol Beijing Sch Chem & Environm Engn Beijing 100083 Peoples R China Beijing Normal Univ High Sch 2 Beijing 100088 Peoples R China

Rapid and highly efficient treatment of acid mine drainage (AMD) is still challenging due to the low pH and high metal concentrations in it. This research focuses on a novel treatment method of AMD using direct contact membrane distillation (DCMD) and photocatalysis to recover water and utilize iron. In the DCMD process without pretreatment, the flux decreased by 93.38%. If pretreated by adding sodium oxalate, scale formation potential was effectively mitigated due to the removal of calcium and complexing of iron. For the treatment of the pretreated AMD (PAMD), 60% of water was recovered in the DCMD process with the flux decrease of 22%. The concentrate obtained from the DCMD process demonstrated high photocatalytic activity in the methylene blue (MB) degradation in an aqueous solution. In addition, the Fe (III)-oxalate complexes in the concentrate were reduced to insoluble Fe (II)-oxalate with visible light irradiation, which could be separated by sedimentation and used as a Fenton catalyst. Hence, this novel method exhibits great advantages on effectively inhibiting DCMD membrane fouling during AMD treatment, producing high-quality distillate with low conductivity, and realizing near zero-discharge of AMD. (C) 2021 Elsevier Ltd. All rights reserved.

关键词： Acid mine drainage Sodium oxalate Direct contact membrane distillation Photocatalysis Iron (III) oxalate complex

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