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基于细化用户画像的居民冷暖用电数据预测方法

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智能计算机与应用 2024年第5期14卷 265-269页

作者：吴林峰陈源萍谭元刚国网重庆市电力公司营销服务中心重庆401100 重庆广汇供电服务有限责任公司客户服务分公司重庆401100

为提升电网运营数据应用价值与客户服务精益化管理水平,针对温度变化影响居民用电负荷问题,提出了一种基于细化用户画像+BP神经网络算法的居民冷暖用电数据预测方法。该方法首先利用时序分解对居民随温度变化的日用电量指标进行提取,并... 详细信息

为提升电网运营数据应用价值与客户服务精益化管理水平,针对温度变化影响居民用电负荷问题,提出了一种基于细化用户画像+BP神经网络算法的居民冷暖用电数据预测方法。该方法首先利用时序分解对居民随温度变化的日用电量指标进行提取,并基于此细化居民用电行为画像类,随后基于细化类采用BP神经网络对居民冷暖电量进行预测。实验表明,该算法可提升居民冷暖用电量预测准确度,实现了对居民用电隐性动态特征的深度挖掘。

关键词：时序分解模糊C均值聚类 BP神经网络冷暖用电预测细化用户画像

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企业数据资产化实践案例研究:基于数据要素形态演化视角

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大数据 2024年第2期10卷 3-16页

作者：杨晨刘小钰李远刚魏凌伊上海商学院商务信息学院上海200235 上海数据交易所有限公司上海201203 上海商学院商务经济学院上海200235

数据资产化和数据要素优质供给,对赋能实体经济有放大、叠加和倍增效应。当前研究专注于对数据资产的理论框架和核心环节的深入研究,在实践应用方面缺乏系统性思维和体系化指导。提出了面向企业经营性数据资产的实践探索框架,即“五段... 详细信息

数据资产化和数据要素优质供给,对赋能实体经济有放大、叠加和倍增效应。当前研究专注于对数据资产的理论框架和核心环节的深入研究,在实践应用方面缺乏系统性思维和体系化指导。提出了面向企业经营性数据资产的实践探索框架,即“五段六维”数据资产化过程模型,旨在探究“企业如何有效配置和优化不同维度的使能因素,以有序推进数据资产化过程”这一科学问题。通过调研上海市典型行业内企业的数据产品,凝练了企业数据要素的优质供给策略,并在实践中探索并验证该模型在企业数据资产化进程的适用性,为企业数据资产化提供了实践依据。模型的提出与实例化为促进数据要素优质供给提供了参考。

关键词：数据资产化案例研究参考架构

Towards a universal organogelator:A general mixing approach to fabricate various organic compounds into organogels

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Science China Chemistry 2011年第7期54卷 1051-1063页

作者： DUAN PengFei LI yuangang JIANG Jian WANG TianYu LIU MingHua Beijing National Laboratory for Molecular Science CAS Key Laboratory of Colloid Interface and Chemical Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China College of Chemistry and Chemical Engineering Xi'an University of Science and Technology Xi'an 710054 China

Low-molecular-weight organogels(LMOG) have been attracting a surge interest in fabricating soft *** the finding of the gelator molecules has been developed from serendipity to objective design,the achievement of the gelator molecules still needs good design and tedious organic *** this paper,we proposed a simple and general mixing approach to get the organogel for nearly all the organic compounds and even soluble nanoparticles without any *** have designed a universal gelator molecule,which forms organogels with more than 40 kinds of organic solvents from aploar to polar *** interestingly,when other organic compounds or even nanomaterials,which are soluble in certain organic solvents,are mixed with this gelator molecule,they can form organogels no matter whether the individual compounds could form organogel or *** method is applicable to nearly all kinds of soluble organic compounds and opens an efficient and universal way to fabricate gel materials.

关键词： organogel hybrid system supramolecular chemistry self-assembly soft matter

Influence of microwave treatment under a hydrogen or methane atmosphere on the flotability of the macerals in Shenfu coals

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Mining Science and Technology 2011年第6期21卷 761-766页

作者： Zhao Wei Yang Fusheng Li yuangang Qu Jianlin Zhou Anning College of Chemistry and Chemical Engineering Xi＇an University of Science and Technology Xi＇an 710054 China

The modification of Shenfu coals by a microwave treatment carried out under a hydrogen or a methane atmosphere, and the subsequent maceral separation by flotation, are described in this paper. The surface contact angle and the Zeta potential of the coal macerals were measured both with and without the treat- ment. The results show that the surface wettability of SFF (Shenfu Fusain) and SFV (Shenfu Vitrain) can be changed by the microwave treatment. An increase in the difference in surface wettability of SFF and SFV causes in a subsequent increase in the enrichment of inertinite and vitrinite. The results of the Zeta potential measurements show that the surface potentials of SFF and SFV are also changed by the treatment.

关键词： Microwave Modification Maceral Flotation

Coeffect of trapping behaviors on the performance of GaN-based devices

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Journal of Semiconductors 2018年第9期39卷 50-54页

作者： Xingye Zhou Xin Tan yuangang Wang xubo Song Peng xu Guodong Gu Yuanjie Lü Zhihong Feng National Key Laboratory of ASIC Hebei Semiconductor Research Institute

Trap-induced current collapse has become one of the critical issues hindering the improvement of Ga Nbased microwave power devices. It is difficult to study the behavior of each trapping effect separately with the experimental measurement. Transient simulation is a useful technique for analyzing the mechanism of current collapse. In this paper, the coeffect of surface-and bulk-trapping behaviors on the performance of Al Ga N/Ga N HEMTs is investigated based on the two-dimensional（2 D） transient simulation. In addition, the mechanism of trapping effects is analyzed from the aspect of device physics. Two simulation models with different types of traps are used for comparison, and the simulated results reproduced the experimental measured data. It is found that the final steady-state current decreases when both the surface and bulk traps are taken into account in the ***, contrary to the expectation, the total current collapse is dramatically reduced（e.g. from 18% to 4% for the 90 nm gate-length device）. The results suggest that the surface-related current collapse of Ga N-based HEMTs may be mitigated in some degree due to the participation of bulk traps with short time constant. The work in this paper will be helpful for further optimization design of material and device structures.

关键词： GaN-based HEMT device physics trapping effect transient simulation

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奶牛同期发情-定时输精技术研究进展

畜牧兽医学报 2024年第4期55卷 1412-1422页

作者：向辉桂林森杨迪魏士昊宫艳斌史远刚马云淡新刚宁夏大学动物科技学院银川750021 青铜峡市恒源林牧有限公司青铜峡751600

减少输精次数,缩短空怀间隔,提高奶牛妊娠率是提高奶牛繁殖效率,节约养殖成本的重要保障。奶牛同期发情-定时输精技术不仅能满足上述要求,还能跳过发情鉴定环节,直接进行定时输精,进而最大限度提高奶牛繁殖率。本文介绍了奶牛同期发情-... 详细信息

减少输精次数,缩短空怀间隔,提高奶牛妊娠率是提高奶牛繁殖效率,节约养殖成本的重要保障。奶牛同期发情-定时输精技术不仅能满足上述要求,还能跳过发情鉴定环节,直接进行定时输精,进而最大限度提高奶牛繁殖率。本文介绍了奶牛同期发情-定时人工输精(estrous synchronization-fixed-timed artificial insemination, ES-TAI)发展过程中的常用技术和新技术,并将这些技术按不同的处理方式进行归纳分析,重点论述各类技术的原理、操作流程以及实际应用效果,以期为进一步研发更加高效的奶牛同期发情-定时输精新技术和规模化牧场奶牛的繁殖管理提供一定的参考。

关键词：奶牛同期发情-定时输精技术妊娠率预同期双同期

Antihyperglycemic and antioxidant activities of total alkaloids from Catharanthus roseus in streptozotocin-induced diabetic rats

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Journal of Forestry Research 2016年第1期27卷 167-174页

作者： Lin Zhang Gang Wei Yang Liu yuangang Zu Qinghui Gai Lei Yang Key Laboratory of Forest Plant Ecology Ministry of Education Northeast Forestry University

We evaluated the hypoglycemic and antioxi- dant effects of the total alkaloids of leaves and twigs of Catharanthus roseus Linn. （CTA） in streptozotocin （STZ）- induced diabetic rats. The hypoglycemic effect was mea- sured by blood glucose and plasma insulin level. Oxidative stress was measured in heart, liver and kidney by levels of antioxidant markers, free radical scavengers and lipid peroxides i.e. superoxide dismutase （SOD）, catalase （CAT）, glutathione （GSH） and thiobarbituric acid reactive substances （TBARS）. Biochemical parameters, i.e. aspar- tate aminotransferase （AST）, alanine aminotransferase （ALT）, alkaline phosphate （ALP） were observed in diabetic control and treated rats. Oral administration of CTA for 30 days was followed by a significant （P 〈 0.05） decrease in fasting blood glucose and increase in insulin level as compared with untreated diabetic rats. Also it significantly （P 〈 0.05） reduced ALT, AST and ALP. The treatment also resulted in significant （P 〈 0.05） reductions in GSH, SOD, CAT, and decrease in TBARS in the heart, liver and kidney of diabetic rats. The results suggest that CTA can effectively normalize the impaired antioxidant status in STZ-induced diabetes in a dose-dependent *** exerted rapid protective effects against lipid peroxi- dation by scavenging of free radicals and reducing the risk of diabetic complications.

关键词： Antihyperglycemic activity Antioxidantactivity Catharanthus roseus Streptozotocin-induceddiabetic rats Total alkaloids

Development of Fully-Distributed Fiber Sensors Based on Brillouin Scattering

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Photonic Sensors 2011年第1期1卷 54-61页

作者： xuping ZHANG yuangang LU Feng WANG Hao LIANG Yixin ZHANG Institute of Optical Communication Engineering Nanjing UniversityNanjing 210093China

Brillouin scattering based optical fiber sensors(BOFS)have the unique advantages over other sensors such as long distance,fully distributed,and multi-parameter *** progresses on the development of BOFS technology in Nanjing University are *** key technologies to make BOFS with ultra-long distance,high spatial resolution,and fast measuring speed are discussed and realized.

关键词： Brillouin scattering fully distributed optical fiber sensor Brillouin optical time domain reflectometry strain monitoring

数字农业对气候灾害脆弱性的影响研究——以中国粮食主产区为例

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资源开发与市场 2024年第4期40卷 521-532页

作者：张力元黄浩韩沅刚董会忠长江大学经济管理与管理学院湖北荆州434023 华中科技大学管理学院湖北武汉430074 吉林大学东北亚研究院吉林长春130012 山东理工大学管理学院山东淄博255012

探讨数字农业与气候灾害脆弱性之间的内在关系,对农业经济防灾减灾、稳定农业发展具有重要意义。选取2010—2019年13个粮食主产区面板数据,借助纵横拉开档次法、面板灰色关联法、动态空间杜宾模型和合成控制法等方法,探究数字农业对气... 详细信息

探讨数字农业与气候灾害脆弱性之间的内在关系,对农业经济防灾减灾、稳定农业发展具有重要意义。选取2010—2019年13个粮食主产区面板数据,借助纵横拉开档次法、面板灰色关联法、动态空间杜宾模型和合成控制法等方法,探究数字农业对气候灾害脆弱性的影响效应。结果表明:①数字农业发展格局由低值单极化向多极化转变,气候灾害脆弱性呈现“南高北低”分布特征,二者存在负向关联;②数字农业会显著降低本地及邻近地区气候灾害脆弱性,在改变空间权重矩阵后,该结论依旧稳健;③将“农业农村大数据试点”政策作为外生冲击检验,发现数字农业降低试点粮食主产区气候灾害脆弱性的结果依旧稳健;④数字农业信息基础是数字农业降低气候灾害脆弱性发挥的首要因素。粮食主产区应完善数字农业基础设施建设、持续提升农业数字科技水平,以助力粮食主产区应对气候变化、实现农业高质量发展。

关键词：数字农业气候灾害脆弱粮食主产区纵横拉开档次法合成控制法