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黑龙江省农产品情怀营销模式发展研究

安徽农学通报 2022年第2期28卷 132-135页

作者：孙小敏范颖金菊哈尔滨商业大学黑龙江哈尔滨150028

黑龙江省作为我国农业大省,在农产品销售方面尚存在销售方式单一、农产品营销观念落后等问题,这些因素制约着黑龙江省农产品市场占有率、品牌知名度与产品竞争力的提高。该文介绍了黑龙江省农产品营销现状,分析了目前营销存在的问题,并... 详细信息

黑龙江省作为我国农业大省,在农产品销售方面尚存在销售方式单一、农产品营销观念落后等问题,这些因素制约着黑龙江省农产品市场占有率、品牌知名度与产品竞争力的提高。该文介绍了黑龙江省农产品营销现状,分析了目前营销存在的问题,并结合国内外相关经验,对黑龙江省农产品的营销方式提出了对策建议,以促进其更好地发展。

关键词：情怀营销 SWOT分析 PEST分析

Determination of averaging period parameter and its effects analysis for eddy covariance measurements

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Science China Earth Sciences 2005年第z1期48卷 33-41页

作者： sun xiaomin, ZHU Zhilin, XU Jinping, YUAN Guofu , ZHOU Yanlian & ZHANG Renhua Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China Graduate School of the Chinese Academy of Sciences, Beijing 100039, China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

It is more and more popular to estimate the exchange of water vapor, heat and CO2fluxes between the land surface and the atmosphere using the eddy covariance technique. To get believable fluxes, it is necessary to correct the observations based on the different surface conditions and to determine relevant techinical parameters. The raw 10 Hz eddy covariance data observed in the Yucheng and Changbai Mountains stations were recalculated by various averaging periods (from 1 to 720 min) respectively, and the recalculated results were compared with the results calculated by the averaging period of 30 mins. Meanwhile, the distinctions of fluxes calculated by different averaging periods were analyzed. The continuous 15 days observations over wheat fields in the Yucheng station were mainly analyzed. The results are shown that: (i) In the Yucheng station, compared with the observations by 30 min, when the averaging period changes from 10 to 60 min, the variations of the eddy-covariance estimates of fluxes were less than 2%; when the averaging period changes less than 10 min, the estimate of fluxes reduced obviously with the reduction of the averaging period (the max relative error was -12%); and when the averaging period exceeds 120 min, the eddy covariance estimates of fluxes will be increased and become unsteady (the max relative error is over 10%); (ii) the eddy covariance estimates of fluxes over wheat field in the Yucheng station suggusted that it is much better to take 10 min as an averaging period in studying diurnal change of fluxes, and take 30min for a long-term flux observation; and (iii) normalized ratio was put forward to determine the range of averaging period of eddy covariance measurements. By comparing the observations over farmlands and those over forests, it is indicated that the increase of eddy covariance estimates over tall forest was more than that over short vegetation when the averaging period increased.

关键词： eddy covariance, various surface conditions, averaging period, parameter, ChinaFLUX.

骨科下肢手术中空气止血带压力改良设定的临床观察

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外科研究与新技术 2019年第3期8卷 211-215页

作者：姚英孙晓敏同济大学附属同济医院手术室

目的对骨科下肢手术时空气止血带压力设置进行改良设定,以降低止血带压力过高导致的相关并发症发生率。方法将70例拟全麻下行预计手术时间在90min以内骨科下肢手术的患者随机分为两组。对照组止血带压力设定为患者上臂无创袖带测量血压... 详细信息

目的对骨科下肢手术时空气止血带压力设置进行改良设定,以降低止血带压力过高导致的相关并发症发生率。方法将70例拟全麻下行预计手术时间在90min以内骨科下肢手术的患者随机分为两组。对照组止血带压力设定为患者上臂无创袖带测量血压收缩压值的2倍并锁定,改良组设定为无创袖带测量健侧下肢与患侧捆绑止血带相对应处的血压收缩压值上调30%并锁定。麻醉后观察并记录患者术中右上肢、健侧下肢血压测量值。比较两组患者术中出血情况、止血带休克发生、术毕时止血带捆绑处皮肤情况、术后第1天止血带捆绑处疼痛情况和患肢感觉异常等并发症的差异。结果两组需降压患者比例差异无统计学意义(P=0.051);两组术中出血情况差异无统计学意义(P>0.05)。改良组术后皮肤状况好于对照组(P<0.05)。改良组术后止血带部位疼痛程度低于对照组(P<0.001)。两组均未见止血带休克、相关感觉运动异常等并发症。结论根据患者健侧下肢收缩压测量值设置充气止血带压力在短时间的下肢骨科手术中可做到止血满意。

关键词：下肢手术止血带充气压力

西门子Easy Screen对倒棱机床界面二次开发

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制造技术与机床 2017年第11期 171-174页

作者：黄曼曼洪荣晶孙小敏黄浩南京工业大学机械与动力工程学院江苏南京211816 南京工大数控科技有限公司江苏南京211800

以西门子840Dsl数控系统为平台,利用Easy Screen开发出符合要求的倒棱机床人机交互界面(基本参数界面、参数补偿界面、刀具对中界面、倒棱加工界面),并根据操作习惯及人机工程学原理安排界面要素及功能调用层次。保证开发出的界面操作... 详细信息

以西门子840Dsl数控系统为平台,利用Easy Screen开发出符合要求的倒棱机床人机交互界面(基本参数界面、参数补偿界面、刀具对中界面、倒棱加工界面),并根据操作习惯及人机工程学原理安排界面要素及功能调用层次。保证开发出的界面操作简单方便、功能全面、界面美观。

关键词： Easy Screen Sinumerik 840Dsl 倒棱机床人机界面

基于“模块式”一体化教学模式的研究与实践——以高职物联网应用技术专业为例

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无线互联科技 2021年第8期18卷 111-112页

作者：孙晓敏王宇潍坊职业学院山东潍坊262737

传统的人才培养模式下,轻实践重理论是物联网应用技术专业普遍存在的问题。文章旨在对高职院校物联网应用技术专业的教学特点进行分析,研究适合于物联网应用技术专业的"模块式"一体化教学模式,以此来提高学生的综合实践技能,从而实现职... 详细信息

传统的人才培养模式下,轻实践重理论是物联网应用技术专业普遍存在的问题。文章旨在对高职院校物联网应用技术专业的教学特点进行分析,研究适合于物联网应用技术专业的"模块式"一体化教学模式,以此来提高学生的综合实践技能,从而实现职业院校培养技术技能人才的培养目标。

关键词：物联网应用技术 “模块式”一体化综合实践

Correcting method of eddy covariance fluxes over non-flat surfaces and its application in ChinaFLUX

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Science China Earth Sciences 2005年第z1期48卷 42-50页

作者： ZHU Zhilin, sun xiaomin, ZHOU Yanlian, XU Jinping, YUAN Guofu & ZHANG Renhua Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China Graduate School of the Chinese Academy of Sciences, Beijing 100039, China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing 100101 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Although Eddy Covariance (EC) technique is one of the best methods for estimating the energy and mass exchanges between underlying surface and atmosphere in micrometeorology, errors and uncertainties still exist without necessary corrections. In this paper, we will focus on the effect of coordinate system on the eddy fluxes. Based on the data observed over four sites (one farmland site, one grassland site and two forest sites), the effects of three coordinate system transforming methods (Double Rotation-DR, Triple Rotation-TR and Planar Fit-PF)on the turbulent fluxes are analyzed. It shows that (i) the corrected fluxes are more or less than the uncorrected fluxes, which is related mainly to the sloping degree of surface, wind speed and wind direction; and (ii) pitch angle has a sinusoidal dependence on wind direction, especially in the regular sloping terrain; and (iii) PF method is something like the simplification of TR or DR,and there are not obvious distinctions in correction in sloping grassland and flat farmland, but PF method is not suitable for uneven and irregular forest sites.

关键词： eddy covariance fluxes, unhomogeneous surfaces, coordinate transform, correction, ChinaFLUX.

Seasonal dynamics of CO_2 fluxes from subtropical plantation coniferous ecosystem

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Science China Earth Sciences 2006年第S2期49卷 99-109页

作者： LIU Yunfen, YU Guirui, WEN Xuefa, WANG Yinghong, SONG Xia, LI Ju, sun xiaomin, YANG Fengting, CHEN Yongrui & LIU Qijing Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China College of Resources and Environmental Science, China Agricultural University, Beijing 100094, China Chinese Acad Sci Inst Geog Sci & Nat Resources Res Beijing 100101 Peoples R China Chinese Acad Sci Inst Atmospher Phys Beijing 100029 Peoples R China Chinese Acad Sci Inst Atmospher Phys Beijing 100029 Peoples R China China Agr Univ Coll Resources & Environm Sci Beijing 100094 Peoples R China

As one component of ChinaFLUX, the measurement of CO2 flux using eddy covariance over subtropical planted coniferous ecosystem in Qianyanzhou was conducted for a long term. This paper discusses the seasonal dynamics of net ecosystem exchange (NEE), ecosystem respiration (RE) and gross ecosystem exchange (GEE) between the coniferous ecosystem and atmosphere along 2003 and 2004. The variations of NEE, RE and GEE show obvious seasonal variabilities and correlate to each other, i.e. lower in winter and drought season, but higher in summer; light, temperature and soil water content are the main factors determining NEE; air temperature and water vapor pressure deficit (VPD) influence NEE with stronger influence from VPD. Under the proper light condition, drought stress could decrease the temperature range for carbon capture in planted coniferous, air temperature and precipitation controlled RE; The NEE, RE, and GEE for planted coniferous in Qianyanzhou are -387.2 gC·m-2 a-1,1223.3 g C·m-2 a-1, -1610.4 g C·m-2 a-1 in 2003 and -423.8 g C·m-2 a-1, 1442.0 g C·m-2 a-1, -1865.8 g C·m-2 a-1 in 2004, respectively, which suggest the intensive ability of plantation coniferous forest on carbon absorbing in Qianyanzhou.

关键词： plantation eddy covariance photosynthesis respiration drought stress.

Net water vapour exchange over a mixed needle and broad-leaved forest in Changbai Mountain during autumn

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Journal of Geographical Sciences 2003年第4期13卷 463-468页

作者： HANShijie WENXuefa YUGuirui sunxiaomin LIQingkang RENChuanyou InstituteofAppliedEcology CASShenyang110016China Inst.ofGeographicSciencesandNaturalResourcesResearch CASBeijing100101China

Water vapour and CO2 fluxes were measured by the eddy-covariance technique above a mixed needle and broad-leaved forest with affiliated meteorological measurements in Changbai Mountain as part of China's FLUX projects since late August in 2002. Net water vapour exchange and environmental control over the forest were examined from September 1 to October 31 in 2002. To quantify the seasonal dynamics, the transition period was separated into leafed, leaf falling and leafless stages according to the development of leaf area. The results showed that (a) seasonal variation of water vapour exchange was mainly controlled by net radiation (Rn) which could account for 78.5%, 63.4% and 56.6% for leafed, leaf falling and leafless stages, respectively, while other environmental factors' effects varied evidently; (b) magnitude of water vapour flux decreased remarkably during autumn and daily mean of water vapour exchange was 24.2 mg m-2 s-1 (100%), 14.8 mg m-2 s-1 (61.2%) and 10.3 mg m-2 s-1 (42.6%) for leafed, leaf falling and leafless stage, respectively; and (c) the budget of water vapour exchange during autumn was estimated to be 87.1 kg H2O m-2, with a mean of 1427.2 g H2O d-1' varying markedly from 3104.0 to 227.5 g H2O m-2d-1.

关键词： eddy-covariance net water vapour exchange latent heat flux

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快速评价海水入侵区地层渗透性实验研究

水利学报 2020年第10期51卷 1234-1247页

作者：戴云峰林锦郭巧娜孙晓敏陈永强刘九夫南京水利科学研究院水文水资源与水利工程科学国家重点实验室江苏南京210029 南京水利科学研究院地下水研究中心江苏南京210029 河海大学地球科学与工程学院江苏南京211100

为快速评价海水入侵区不同埋深地层渗透性,减少实施常规水文地质试验对存在污染含水层的扰动,提出利用振荡试验技术确定滨海地层渗透系数。室内海水入侵砂槽物理模型中实施了注水式振荡试验,在人工潜水含水层和承压含水层中同步监测了... 详细信息

为快速评价海水入侵区不同埋深地层渗透性,减少实施常规水文地质试验对存在污染含水层的扰动,提出利用振荡试验技术确定滨海地层渗透系数。室内海水入侵砂槽物理模型中实施了注水式振荡试验,在人工潜水含水层和承压含水层中同步监测了试验主井和相邻观测井中水位响应;龙口海水入侵区地下水分层监测井中实施了提水式和注水式振荡试验;利用配线法计算了室内实验和现场实验中目标地层渗透系数。结果表明:海水入侵砂槽物理模型中实施振荡试验为滨海含水层现场利用振荡试验确定不同埋深含水层渗透系数提供了重要经验;相比于提水式振荡试验,注水式振荡试验更易于实施,激发方式(提水和注水)的不同并没有对试验结果造成明显的影响;利用振荡试验在非常短时间内(单井水位恢复时长大部分少于5 min)确定了龙口海水入侵区重要监测断面上不同埋深含水层渗透系数,实验结果准确可靠。

关键词：振荡试验海水入侵区室内实验现场实验渗透系数