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“增强职业教育适应性”文化-认知的悬浮表征及落地路向

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黑龙江高教研究 2024年第3期42卷 135-141页

作者：张海军张万红中国矿业大学江苏徐州221000 江苏财经职业技术学院江苏淮安223003

基于教育“共同利益”视角,深度访谈了26位校企合作相关者,采用程序化扎根理论三级编码方法,归纳出与“增强职业教育适应性”文化-认知紧密相关的图式有“合作动机”文化-认知图式、“自我身份”文化-认知图式、“创新创业”文化-认知... 详细信息

基于教育“共同利益”视角,深度访谈了26位校企合作相关者,采用程序化扎根理论三级编码方法,归纳出与“增强职业教育适应性”文化-认知紧密相关的图式有“合作动机”文化-认知图式、“自我身份”文化-认知图式、“创新创业”文化-认知图式。这些认知图式影响着个体以某种相似的方式去理解职业教育适应性并指导其行为,反映出职业教育的“结构嵌入”、合作发展的“齐心协力”、创新创业的“绚丽多彩”等悬浮表征。提出了“共同利益”理念指导下的职业教育“关系嵌入”、共建知识技能“共享平台”、立足岗位创新创业能力“开花结果”等措施,弱化悬浮表征产生的负面作用,不断增强职业教育适应性。

关键词：职业教育适应性文化-认知共同利益 NVivo

2019—2023年台州市市售蔬菜中9种金属与类金属污染状况及健康风险评估

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现代预防医学 2024年第14期51卷 2662-2668页

作者：王玺罗亚翠张海君台州市疾病预防控制中心

目的了解台州地区市售蔬菜中铅、镉、总汞、总砷、总铬、锰、镍、铝、铜的污染状况并进行人群健康风险评估。方法按照国家相关标准要求对2019—2023年采集的四类市售蔬菜样品中金属及类金属进行含量检测，采用单因子污染指数法（Pi）... 详细信息

目的了解台州地区市售蔬菜中铅、镉、总汞、总砷、总铬、锰、镍、铝、铜的污染状况并进行人群健康风险评估。方法按照国家相关标准要求对2019—2023年采集的四类市售蔬菜样品中金属及类金属进行含量检测，采用单因子污染指数法（Pi）、内梅罗综合污染指数法（PM）进行污染评价，采用目标危害系数法（THQ）、总体目标危害系数法（TTHQ）进行人群健康风险评价。结果共采集四类蔬菜419份，铜与锰的检出率最高，均为100.0%,其余由高到低依次为镍（89.17%）>铝（87.26%）>镉（85.20%）>总砷（52.03%）>铅（35.32%）>铬（30.79%）>总汞（2.39%）。镉总体超标率为2.63%,超标样本集中在根茎类蔬菜，其余元素均未超标。不同类别蔬菜中铅、镉、总汞、总砷、总铬的Pi与PM均≤0.7;成人摄入四类蔬菜的TTHQ值均1.0。结论台州市市售四类蔬菜中9种金属与类金属总体污染水平较低，居民经蔬菜摄入这9种金属与类金属健康风险水平可接受，但儿童摄入根茎类与叶菜类蔬菜可能会对人体健康产生负面影响。

关键词：蔬菜金属类金属健康风险评估

气相色谱质谱法测定淡水养殖用水中5种三嗪类农药残留

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化学工程师 2024年第2期38卷 31-33,96页

作者：张海军刘辉河南省息县水产技术研究推广中心河南信阳464300 河南省鹤壁市农业农村发展服务中心河南鹤壁458030

建立了固相萃取法-气相色谱质谱法测定淡水养殖水体中扑灭津、阿特拉津、西玛津、环草津和特丁津残留的检测方法。5种三嗪类农药在4.00~160μg·L^(-1)浓度范围内线性相关系数均大于0.998,检出限为0.024~0.040μg·L^(-1),低、中、高3... 详细信息

建立了固相萃取法-气相色谱质谱法测定淡水养殖水体中扑灭津、阿特拉津、西玛津、环草津和特丁津残留的检测方法。5种三嗪类农药在4.00~160μg·L^(-1)浓度范围内线性相关系数均大于0.998,检出限为0.024~0.040μg·L^(-1),低、中、高3种不同浓度加标回收率为87.4%~104.7%。本方法操作简便,灵敏度高,测试准确,可用于淡水养殖用水中三嗪类农药残留的检测分析。

关键词：固相萃取法气相色谱质谱法养殖水三嗪类农药

Exact Two-Soliton Solutions for Discrete mKdV Equation

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Communications in Theoretical Physics 2008年第6期49卷 1553-1556页

作者： YANG Qin zhang hai-jun School of Electrical and Mechanical Engineering Jiaxing University Jiaxing 314001 China College of Electrical Engineering Zhejiang University Hangzhou 310027 China

An exact two-soliton solution of discrete mKdv equation is derived by using the Hirota direct approach. In addition, we plot the soliton solutions to discuss the properties of solitons. It is worth while noting that w... 详细信息

关键词： discrete equation Hirota direct method soliton

Experimental study of novel microactuator based on photothermal expansion

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Optoelectronics Letters 2008年第2期4卷 89-91页

作者： LIU Chao zhang Dong-xian zhang hai-jun State Key Laboratory of Modern Optical Instruments Zhejiang University Hangzhou 310027 China

A novel photothermal drive method was proposed. A novel photothermal micro-actuator （PTA） was developed with this method. We introduced the deflection mechanism of the asymmetric expansive arms with different widths. When a beam of infrared laser irradiates the arms, the different increase temperature and photothermal expansion controlled by the different rates of specific surface area cause a magnified lateral deflection. A prototyping micro-actuator of 1000 μm length was manufactured by using anexcimer laser micromachining system, and using polypropylene material. Experiments have been carded out to check the feasibility of deflection, with a laser diode （650 nm） as the external power source to activate the micro-actuator. The results show that the actuator can practically generate an obvious lateral deflection without considering the size or the location of the irradiated light spot strictly. The deflection status of the micro-actuator could be controlled remotely from 0 μm to 14.33 μm by changing the laser power from 0 mW to 10 mW. This kind of novel PTA is quite simple and convenient for operation. It will be quite useful for the applications in the fields of micro/nano-technology and with large displacement/actuation force and remote controlling.

关键词：光致发热 PTA 激光器集成光学

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“无人机—卡车”配送路径优化研究

管理工程师 2024年第2期29卷 37-45页

作者：闫琼刘畅畅张海军郑州航空工业管理学院河南郑州450015

为有效提升“最后一公里”配送效率,以总运营成本最少为目标函数,提出了考虑道路拥堵指数的“无人机—卡车”配送路径优化模型。首先,基于改进的K-means算法确定卡车配送点;接着考虑道路拥堵指数,运用节约里程法得到卡车配送路径;然后... 详细信息

为有效提升“最后一公里”配送效率,以总运营成本最少为目标函数,提出了考虑道路拥堵指数的“无人机—卡车”配送路径优化模型。首先,基于改进的K-means算法确定卡车配送点;接着考虑道路拥堵指数,运用节约里程法得到卡车配送路径;然后采用改进模拟退火算法确定无人机飞行路线;最后选取郑州市主城区的80个小区进行实例计算,与卡车单独配送相比,“无人机—卡车”配送模式的配送成本降低了110元,约减少了13.78%。实例计算结果表明,“无人机—卡车”联合配送模型可有效减少配送成本,求解算法高效,更加贴合现实的配送场景,为新时代物资配送问题提供了理论参考。

关键词：无人机—卡车路径优化 K-means算法模拟退火算法

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南水北调中线水源区植被指数时空变化分析

湖北农业科学 2024年第2期63卷 205-210页

作者：白景锋张海军白云帆南阳师范学院地理科学与旅游学院/河南省环境激光遥感技术与应用工程研究中心/南水北调中线水源区水安全协同创新中心河南南阳473061 吉林师范大学博达学院吉林四平136000

通过单线性回归(SLOPE)和地理加权回归(GWR)法,用植被指数(NDVI)研究南水北调中线水源区的植被分布变化趋势及机制,为保障水量和水质提供理论支撑。结果表明,2000—2019年水源区NDVI和入库流量呈现同步增长,植被逐渐变好,2007年以前NDV... 详细信息

通过单线性回归(SLOPE)和地理加权回归(GWR)法,用植被指数(NDVI)研究南水北调中线水源区的植被分布变化趋势及机制,为保障水量和水质提供理论支撑。结果表明,2000—2019年水源区NDVI和入库流量呈现同步增长,植被逐渐变好,2007年以前NDVI增长幅度大,2008—2011年处于波动阶段,2012年以后增长幅度减小;NDVI变化最明显的是研究区东北部、西部和丹江口库区周边,这些区域地势相对低平、人口集中,中山和高山区NDVI变化不大;高程、坡度、人口数和城镇化是影响水源区NDVI分布的主要因素,降水、气温和产业比重是次要因素;各因素影响的强度和方向在空间上有异质性,自然地理因素对NDVI影响的最显著范围为高程1090 m以下、年均降水量980 mm以上的区域,人文地理因素影响的显著范围区是人口密度大、城镇化率高的地区。

关键词：南水北调中线水源区 NDVI 时空变化

An artificial intelligence approach for particle transport velocity prediction in horizontal flows

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Particuology 2024年第9期92卷 234-250页

作者： Haoyu Chen Zhiguo Wang hai Huang jun zhang College of Petroleum Engineering Xi'an Shiyou UniversityXi'an710065China Shaanxi Key Laboratory of Carbon Dioxide Sequestration and Enhanced Oil Recovery Xi'an710065China College of New Energy Xi'an Shiyou UniversityXi'an710065China Engineering Research Center of Smart Energy and Carbon Neutral in Oil&Gas Field Universities of Shaanxi ProvinceChina The Erosion/Corrosion Research Center The University of TulsaOK74104United States

Particle entrainment is an inevitable phenomenon in pipeline systems,especially during the development and extraction phases of oil and gas *** predicting the critical velocity for particle transport is a key focus for implementing effective sand control *** work presents a semi-supervised learning–deep hybrid kernel extreme learning machine(SSL-DHKELM)model for predicting the critical velocity,which integrates multiple machine learning theories including the deep learning approach,which is adept at advanced feature ***,the SSL framework enhances the model's capabilities when data availability is *** improved slime mould algorithm is also employed to optimize the model's *** proposed model has high accuracy on both the sample dataset and out-of-sample *** trained with only 10%of the data,the model's error still did not increase ***,this model achieves superior predictive accuracy compared to existing mechanistic models,demonstrating its impressive performance and robustness.

关键词： Particle transport Critical velocity Deep learning Semi-supervised learning Extreme learning machine

Discovery of the choristodere Hyphalosaurus baitaigouensis from the Lower Cretaceous Jiufotang Formation of western Liaoning,China and its paleobiogeographic significance

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Journal of Palaeogeography 2024年第3期13卷 547-562页

作者： Li-jun zhang Shu-An Ji hai-Chun zhang South China Sea Culture Museum Hainan Tropical Ocean UniversitySanya 572022Hainan ProvinceChina Key Laboratory of Stratigraphy and Paleontology Ministry of Natural ResourcesInstitute of GeologyChinese Academy of Geological SciencesBeijing 100037China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of SciencesNanjing 210008Jiangsu ProvinceChina

The water-living reptile genus Hyphalosaurus was previously discovered in the Lower Cretaceous Yixian Formation bearing the middle Jehol Biota in western Liaoning,*** complete skeletons of Hyphalosaurus are reported for the first time from the Jiufotang Formation bearing the late Jehol Biota at two sites in western *** show the typical characteristics of Hyphalosaurus baitaigouensis in terms of the contact between some cranial bones and the number of cervical and dorsal vertebrae,and therefore are assigned to *** discovery extends the stratigraphic range of this species from the Yixian Formation to the overlying Jiufotang *** paper further briefly compares the main characteristics of the two skeletons,summarizes the temporal and spatial distribution of Hyphalosaurus,and discusses the palaeogeographic evolution of western Liaoning at the middle and late Jehol Biota stages based on the aquatic habits of Hyphalosaurus and the geological background of western *** analytical results show that the volcanic downwarped lakes,with distinct geographical divisions in western Liaoning during the deposition of the Yixian Formation,had not completely disappeared till the deposition of the Jiufotang *** palaeo-lake in the Fuxin-Yixian Basin underwent the process of generation,expansion and shrinkage during the depositional period of the Yixian Formation and finally merged into a large *** palaeo-Dalinghe River,which connected the main basins in western Liaoning during the depositional period of the Jiufotang Formation,was formed simultaneously.

关键词： Western liaoning Jehol biota Jiufotang formation Hyphalosaurus baitaigouensis Palaeobiogeography