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高速公路隧道接近段视错觉控速标线信息感知研究

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公路交通科技 2024年第4期41卷 146-156页

作者：梁波秦杨张红杰刘涛文森重庆交通大学土木工程学院重庆400074 重庆交通大学山区桥梁及隧道工程国家重点实验室重庆400074 泸州市交通建设工程服务中心四川泸州646000 招商局重庆交通科研设计院有限公司重庆400067

由于高速公路隧道洞口处存在黑洞效应,且隧道内外限速存在差异,因此,高速公路隧道洞口处成为事故高发路段。为了改善高速公路隧道洞口处行车的安全舒适性,常在隧道接近段布设视错觉控速标线给予驾驶员视觉冲击,起到提醒驾驶员安全减速... 详细信息

由于高速公路隧道洞口处存在黑洞效应,且隧道内外限速存在差异,因此,高速公路隧道洞口处成为事故高发路段。为了改善高速公路隧道洞口处行车的安全舒适性,常在隧道接近段布设视错觉控速标线给予驾驶员视觉冲击,起到提醒驾驶员安全减速的作用。本研究利用UC-win/Road软件建立仿真模型,通过室内模拟驾驶平台进行仿真试验,利用眼动仪对驾驶员视觉信息感知进行测量,选取物理指标速度降低率、最大减速度值和生理指标瞳孔直径变化率作为评价指标。基于加权RSR综合评价法,分别对行车道上不同闪现率的车速增加式视错觉控速标线(横向形、鱼刺形)和车道压缩式视错觉控速标线(正梳齿形、斜梳齿形)进行减速效果评价。结果表明:4种视错觉控速标线都具有影响驾驶员感知信息的能力,其影响程度从大到小为鱼刺形、横向形、正梳齿形、斜梳齿形;相同类型不同闪现率的视错觉控速标线减速效果存在差异性,相同闪现率下车速增加式视错觉控速标线减速效果较车道压缩式视错觉控速标线好;在满足行车舒适度要求下,快车道推荐布设闪现率为8 Hz的横向形视错觉控速标线,慢车道推荐布设闪现率为8 Hz的鱼刺形视错觉控速标线。

关键词：隧道工程视错觉控速标线加权RSR评价法高速公路隧道接近段信息感知

Anterior bone loss after cervical disc replacement: A systematic review

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World Journal of Clinical Cases 2020年第21期8卷 5284-5295页

作者： xiao-Fei Wang Yang Meng Hao liu Ying hong Bei-Yu Wang Department of Orthopaedic Surgery West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Anesthesia and Operation Center/West China School of Nursing West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Anterior bone loss(ABL)is a relatively easily neglected condition after cervical disc replacement(CDR).Whether this phenomenon is a radiological anomaly or a complication remains *** studies have reported the clinical characteristics of ABL and speculated on the pathogenic mechanism based on a certain type of artificial disc,while the overall understanding of ABL is *** To describe the prevalence,impacts,and risk factors of ABL after *** We searched the PubMed,Cochrane Library,and Excerpta Medica databases using the terms“bone loss”or“bone remodeling”or“bone absorption”or“osteolysis”or“implant loosening”or“implant migration”or“hypersensitivity”or“hyperreactivity”,“cervical disc replacement”or“cervical disc arthroplasty”or“total disc replacement”.Eligible manuscripts on the prevalence and impacts of ABL were reviewed by the *** extraction was performed using an established extraction *** results of the included studies were described *** Six studies met the inclusion and exclusion *** was a prospective study and the others were retrospective studies.A total of 440 patients with 536 segments were *** artificial cervical discs included Bryan,Baguera-C,Discocerv,and *** prevalence of ABL ranged from 3.13%to 91.89%,with a combined overall prevalence of 41.84%.ABL occurred within 6 mo and stopped 12 mo after *** cases were noted to have a self-healing *** ABL resulted in segmental kyphosis,implant subsidence,and persistent neck *** may be related to heterotopic *** surgery may be one of the risk factors for *** ABL is a common condition after *** underlying mechanisms of ABL may include stress concentration and injury to nutrient *** should be considered a complication after CDR as it was associated with neck pain,implant subsidence,and heterotopic ossification.

关键词： Bone loss Bone remodeling Stress shielding Risk factor Systematic review

美国国会图书馆藏《胶莱河辩议图说汇辑》考释——兼谈明万历年间的胶莱河议案

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历史地理研究 2024年第3期44卷 124-134,157页

作者：杨霄复旦大学历史地理研究中心上海200433

明万历三十年,灵山卫指挥使谈九畴实地勘查胶莱河流域,编绘了胶莱河图说。后经清康雍年间张谦宜摹绘并增补相关奏议、跋语等,形成今本《胶莱河辩议图说汇辑》。该图说是目前所见时代最早、内容最丰富的胶莱河流域水利专门地图,保存了明... 详细信息

明万历三十年,灵山卫指挥使谈九畴实地勘查胶莱河流域,编绘了胶莱河图说。后经清康雍年间张谦宜摹绘并增补相关奏议、跋语等,形成今本《胶莱河辩议图说汇辑》。该图说是目前所见时代最早、内容最丰富的胶莱河流域水利专门地图,保存了明后期胶莱河流域的地理环境信息。对图中地物及景观进行考证研究,可以复原胶莱河流域在明代晚期的地理环境,也可为研究其历史时期的发展演变过程提供依据。图中对王献与刘应节先后试凿胶莱河史实的记载,亦可补《明史·河渠志》《明实录》等史料的不足,使今人得以重新检视万历初年曾经聚讼纷纭的胶莱河议案。

关键词：胶莱河古地图档案文献谈九畴张谦宜

大数据时代应用型高校教务管理数字化发展研究

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数字通信世界 2024年第9期 221-223页

作者：肖云虹刘硕大连医科大学中山学院辽宁大连116006

该文首先分析大数据时代下应用型高校教务管理数字化发展现状,之后探讨数字化在应用型高校教务管理中的应用场景与需求,提出大数据时代应用型高校教务管理数字化的应用路径,并分析应用型高校教务管理数字化带来的影响与作用,最后研究应... 详细信息

该文首先分析大数据时代下应用型高校教务管理数字化发展现状,之后探讨数字化在应用型高校教务管理中的应用场景与需求,提出大数据时代应用型高校教务管理数字化的应用路径,并分析应用型高校教务管理数字化带来的影响与作用,最后研究应用型高校教务管理数字化的未来发展方向与趋势。

关键词：应用型高校教务管理大数据时代数字化

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福建龙岩烟区烤烟施肥关键参数研究

中国土壤与肥料 2024年第7期 123-128页

作者：荆晓雯曾文龙蒋鸿月钟小丽边立丽李志宏兰其骏张云贵吴树松蒋代兵郭学清刘青丽中国农业科学院农业资源与农业区划研究所北京100081 福建省烟草公司龙岩市公司福建龙岩364000 云南农业大学烟草学院云南昆明650201

为了研究福建省龙岩市烟区不同肥料用量下烤烟的肥料效应,确定适宜的肥料施用量,在福建省龙岩市,以当地主栽品种云烟87为材料,开展了氮肥6水平、磷钾肥2水平的肥料田间试验。研究了氮、磷、钾肥料配合施用对烤烟养分吸收量、相对产量及... 详细信息

为了研究福建省龙岩市烟区不同肥料用量下烤烟的肥料效应,确定适宜的肥料施用量,在福建省龙岩市,以当地主栽品种云烟87为材料,开展了氮肥6水平、磷钾肥2水平的肥料田间试验。研究了氮、磷、钾肥料配合施用对烤烟养分吸收量、相对产量及限制产量的养分因素、经济性状及肥料利用率的影响。结果表明:在烤烟生育期内,氮、磷、钾的养分积累量表现为钾>氮>磷,养分积累主要集中在旺长期。缺素会使龙岩烟区烤烟产量和经济性状降低,缺氮、缺磷、缺钾对烤烟产量和经济性状的影响大小表现为缺氮>缺磷>缺钾。不同施氮处理中,N3处理(N:135kg/hm^(2),P_(2)O_(5):105kg/hm^(2),K_(2)O:375kg/hm^(2))的各项指标最优,分别为产量2053.17kg/hm^(2)、上等烟比例79.64%、中上等烟比例95.64%、产值61850.36元/hm^(2)、均价30.12元/kg、氮肥利用率31.27%农学利用率11.28kg/kg、偏生产力15.21kg/kg。用肥料效应方程对施氮量和烟叶产量进行拟合,方程为y=511.488+1.3614x+0.116x^(2)-0.0004x^(3)(R^(2)=0.9812)。综合烟叶产量、肥料利用率和经济效益,龙岩地区推荐施氮量为135.0~177.2kg/hm^(2)。

关键词：烤烟氮磷钾推荐施肥肥料效应方程

复配菌群降解煤产甲烷的宏基因组与宏转录组分析

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生物技术通报 2024年第9期40卷 270-281页

作者：刘丁瑞郭红光弓凯仪太原理工大学安全与应急管理工程学院太原030024 太原理工大学原位改性采矿教育部重点实验室太原030024

【目的】芳香化合物代谢是微生物降解煤产甲烷的限制因素。为了提高煤的生物甲烷产量,经过富集、驯化获得煤降解产甲烷菌群(RI)和菲降解功能菌群,并通过二者配伍获得复配菌群(CM)。【方法】采用宏基因组与宏转录组相结合方法分析CM与RI... 详细信息

【目的】芳香化合物代谢是微生物降解煤产甲烷的限制因素。为了提高煤的生物甲烷产量,经过富集、驯化获得煤降解产甲烷菌群(RI)和菲降解功能菌群,并通过二者配伍获得复配菌群(CM)。【方法】采用宏基因组与宏转录组相结合方法分析CM与RI的菌群结构及代谢途径的异同。【结果】复配后菌群的甲烷产量明显提高,增产114.55%。复配显著提高了芳香化合物降解菌的占比,如Pseudomonas的占比高达63.49%;同时提高了优势菌的代谢活性以及芳香化合物代谢途径中各关键酶的合成和表达。CM中芳香族化合物降解途径的基因丰度是RI的1.65倍,基因表达丰度是RI的6.34倍(P<0.05)。其中,关键酶EC:1.***.11.2基因丰度和表达丰度分别是RI的2.24、62倍。这些酶表达丰度的增加促使更多的芳香族化合物代谢为丙酮酸。复配同时增强了丙酮酸代谢为乙酰辅酶A过程的基因表达,该代谢途径中关键酶EC:1.***.4.1的表达丰度在CM中可达到RI的14.70倍。CM中各产甲烷途径的基因表达丰度也高于RI,是RI的2.66-7.10倍。【结论】复配富集了芳香化合物降解菌,并显著提高了芳香化合物降解产甲烷整个代谢途径中基因丰度,尤其是基因表达丰度,从而提高甲烷产量。

关键词：煤层气复配菌群芳香族化合物宏基因宏转录

Genetically modified pigs with CD163 point mutation are resistant to HP-PRRSV infection

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Analysis of solar radiation changes in Chinese solar greenhouses with different roof structures based on a solar radiation model

动物学研究 2024年第4期 833页

作者： Ying liu Lin Yang hong-Yong Xiang Ming Niu Jia-Cheng Deng Xue-Yuan Li Wen-Jie Hao hong-Sheng Ou-Yang Tong-Yu liu xiao-Chun Tang Da-Xin Pang hong-Ming Yuan

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International Journal of Agricultural and Biological Engineering 2022年第2期15卷 221-229页

作者： Kai liu hongjun Xu hong Li xiao Wu Siyu Sang Jie Gao Department of horticulture College of HorticultureXinjiang Agricultural UniversityUrumqi 830052China Department of Horticulture Center for Postdoctoral Studies of Xinjiang Agricultural UniversityUrumqi 830052China

Chinese solar greenhouses(CSGs)are important agricultural production *** non-artificial heating conditions,solar radiation is the only CSGs energy *** is highly important to optimally obtain solar energy in greenhouse construction and *** this study,a solar radiation model for solar greenhouses was adopted to explore the quantities of solar radiation in greenhouses considering different front roof forms and ***,the solar radiation amounts corresponding to five roof forms,namely,double-section arc,parabolic,oval,arc,and linear roofs,are compared and analyzed during the four solar periods(beginning of spring,vernal equinox,beginning of winter,and winter solstice).It was found that the solar radiation of oval roof greenhouses on the ground was the largest and was 4.44%-23.68%higher than that of parabolic *** addition,the cumulative sum of light on the linear roof greenhouse wall is also the largest and was 6.02%to 12.08%higher than the parabolic roof greenhouse in the four solar ***,the solar radiation in CSGs was compared with front roof angles of 25°,30°,and 35°.It was observed that the solar radiation amount gradually increases with increasing ***,the variation at an angle of 35°influences the solar radiation of the paraboloidal CSGs ground and elliptical CSGs north wall to the greatest extent,which increased by 8.23%and 12.74%,*** study confirms the role of front roof form and inclination angle in enhancing the greenhouse solar radiation level.

关键词： Chinese solar greenhouse roof structure roof angle solar radiation model

Surgical strategy used in multilevel cervical disc replacement and cervical hybrid surgery:Four case reports

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World Journal of Clinical Cases 2020年第17期8卷 3890-3902页

作者： xiao-Fei Wang Yang Meng Hao liu Ying hong Bei-Yu Wang Department of Orthopaedic Surgery West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Operation Room West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND Multilevel artificial cervical disc replacement and anterior hybrid surgery have been introduced as reliable treatments for multilevel cervical degenerative disc *** techniques are important for resolving patients’symptoms and maintaining the normal functioning of cervical ***,the use of inappropriate surgical strategies could lead to complications such as implant migration and neurological *** this paper,we summarize our surgical strategies used in multilevel cervical disc replacement and hybrid surgery into five major *** SUMMARY We share the key notes and our surgical procedures in the form of four typical case *** patients were diagnosed with cervical degenerative disc disease with myelopathy or radiculopathy and needed multilevel cervical spine *** first case demonstrated that index levels indicating the presence of highly serious spinal cord compression required a prioritized *** second case demonstrated that the disc replacement should be performed before fusion in cervical hybrid *** third and forth cases demonstrated that a top-down implantation sequence was needed in continuous two-level cervical disc *** symptoms of all patients were significantly relieved after *** We hope that our surgical strategies can help improve the performance and outcomes of multilevel cervical spine surgery.

关键词： Cervical disc replacement Cervical hybrid surgery Multilevel cervical spine surgery Surgical strategy Implant migration Case report