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On Construction of Supply Chain System for China's Modern Agricultural Products 被引量:3
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作者 Wanjiang WANG 《Asian Agricultural Research》 2015年第10期17-21 24,共6页
In view of drawbacks in supply chain of China's traditional agricultural products,this paper proposed building supply chain system for modern agricultural products: taking informationization as basis,channel syste... In view of drawbacks in supply chain of China's traditional agricultural products,this paper proposed building supply chain system for modern agricultural products: taking informationization as basis,channel system as core,organization system as support,and service system and safety system as guarantee,to promote high efficient operation of the supply chain system. The channel system stresses alliance and integration of channel system,informationization of channel management,and terminalization of channel operation; the organization system stresses organization,large scale,group,and brand of participant entities; service system stresses construction of service means,service platform,and operation mechanism; safety system stresses building quality safety based agricultural product supply chain management mode. In order to ensure high efficient operation of supply chain for modern agricultural products,it is required to straighten out supply chain management system,actively cultivate core enterprises of supply chain,strengthen information construction of supply chain,select suitable supply chain mode,and improve benefit allocation mechanism. 展开更多
关键词 AGRICULTURAL PRODUCTS Supply CHAIN System construc
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Establishment of Agricultural Logistics Warehouse Receipt Pledge System in New Rural Construction 被引量:1
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作者 Yan PANG Jiage ZHAI 《Asian Agricultural Research》 2014年第2期9-13,18,共6页
New rural construction needs a strong financial support. However,agriculture is a high-risk industry; one big obstacle restricting Chinese rural economic development is financing difficulty in the agricultural product... New rural construction needs a strong financial support. However,agriculture is a high-risk industry; one big obstacle restricting Chinese rural economic development is financing difficulty in the agricultural products producing and processing enterprises. This paper,on the foundation of analyzing the current situation of Chinese agricultural products market,with the theory of modern logistics finance,puts forward the approach of establishing Chinese agricultural products logistics pledge system,and illustrates the function of agricultural products logistics warehouse receipt pledge system in the new rural construction. 展开更多
关键词 AGRICULTURAL PRODUCTS LOGISTICS New RURAL construc
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Construction Innovation of Traditional Sports Culture from the Perspective of Sports New Connotations
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作者 Zhang Long 《学术界》 CSSCI 北大核心 2016年第5期291-295,共5页
This paper suggests effectively integrating national spirits,national ethos and social responsibilities through the inheritance and development direction of traditional Chinese culture to enhance the significance and ... This paper suggests effectively integrating national spirits,national ethos and social responsibilities through the inheritance and development direction of traditional Chinese culture to enhance the significance and national value of traditional Chinese sports culture and proposes scientifically constructing the goals of the development of traditional sports culture with respect to the general characteristics of regional humanity and cultural development,thus building up an innovative development path for the construction of traditional sports culture,satisfying the new requirements for traditional sports culture to develop with the times,and fueling the construction and formation of the new normal of its development. 展开更多
关键词 中国传统文化 体育文化 文化建设 创新 民族精神 文化发展 社会责任
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Suggestions on Strengthening Greening Construction of Ecological Residential Areas
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作者 Peng LI 《Asian Agricultural Research》 2013年第9期103-107,共5页
Greening construction is an important part of the construction of ecological residential areas,but there exist some misunderstandings in greening construction of ecological residential districts at present.Based on th... Greening construction is an important part of the construction of ecological residential areas,but there exist some misunderstandings in greening construction of ecological residential districts at present.Based on the description of functions of green space in ecological residential areas,the summarization of principles of greening design,and the discussion of questions in greening construction of ecological residential districts,some suggestions as well as specific measures for strengthening greening construction of ecological residential areas were proposed to promote the healthy development of greening construction in ecological residential areas. 展开更多
关键词 ECOLOGICAL RESIDENTIAL COMMUNITY GREENING construc
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Ecological Construction Based on Land Use Zoning of Anhui Province
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作者 Xin YE Zhongxiang YU 《Asian Agricultural Research》 2013年第5期83-86,共4页
Anhui Province is divided into 6 zones according to land use. This paper firstly introduces ranges, characteristics and problems of land use zoning in Anhui Province. On these bases, it presents the respective ecologi... Anhui Province is divided into 6 zones according to land use. This paper firstly introduces ranges, characteristics and problems of land use zoning in Anhui Province. On these bases, it presents the respective ecological construction mode. Huaibei Plain Zone should focus on agriculture and implement water conservancy project, ecological shelterbelt project and mining subsidence area control works. Jianghuai Hilly Zone should make breakthrough in transforming slope land, speed up restoring forest, grass and vegetation, and implement water-saving agriculture and prevention and control of soil erosion. The Yangtze River Side Plain Zone should take the opportunity of agricultural structural adjustment to implement the ecological construction mode of "reconverting farmland to forests, wetland and lakes". Western Anhui Dabie Mountain Zone should concentrate on setting apart hills for tree growing and transforming slope land, restoring and expanding forest, grass and vegetation, and implementing prevention and control of soil erosion. Southern Anhui Mountain Zone should focus on protecting natural forest, setting apart hills for tree growing, conceding the land to forestry and developing eco-tourism. Residential area should pay close attention to new urbanization construction, center on citizenship of agricultural population, push forward integration of industry and city, coordination of urban and rural areas, and interactive development of primary, secondary and tertiary industries. 展开更多
关键词 ANHUI PROVINCE LAND use ZONING ECOLOGICAL construc
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Downhole microseismic data reconstruction and imaging based on combination of spline interpolation and curveletsparse constrained interpolation
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作者 CHANG Kai LIN Ye +2 位作者 GAO Ji CHEN Yukuan ZHANG Jiewen 《Global Geology》 2016年第1期26-32,40,共8页
When cause of the aliasing lack probl using borehole sensors and microseimic events to image, spatial aliasing often occurred be- of sensors underground and the distance between the sensors which were too large. To so... When cause of the aliasing lack probl using borehole sensors and microseimic events to image, spatial aliasing often occurred be- of sensors underground and the distance between the sensors which were too large. To solve em, data reconstruction is often needed. Curvelet transform sparsity constrained inversion was widely used in the seismic data reconstruction field for its anisotropic, muhiscale and local basis. However, for the downhole ease, because the number of sampling point is mueh larger than the number of the sensors, the advantage of the cnrvelet basis can't perform very well. To mitigate the problem, the method that joints spline and curvlet-based compressive sensing was proposed. First, we applied the spline interpolation to the first arri- vals that to be interpolated. And the events are moved to a certain direction, such as horizontal, which can be represented by the curvelet basis sparsely. Under the spasity condition, curvelet-based compressive sensing was applied for the data, and directional filter was also used to mute the near vertical noises. After that, the events were shifted to the spline line to finish the interpolation workflow. The method was applied to a synthetic mod- el, and better result was presented than using curvelet transform interpolation directly. We applied the method to a real dataset, a mieroseismic downhole observation field data in Nanyang, using Kirchhoff migration method to image the microseimic event. Compared with the origin data, artifacts were suppressed on a certain degree. 展开更多
关键词 downhole microseismic monitoring spline interpolation curvelet transform data reeonstru~~'tion
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General awareness of symptoms of myocardial infarction and the need for urgent treatment:A cross-sectional,street survey in Chennai,Tamil Nadu
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作者 Thirumurugan E Gomathi K +4 位作者 Swathy P Syed Ali Afrin Ponduri Lakshmi Alekhya Jishnu B Banashree Das 《Journal of Acute Disease》 2023年第2期51-56,I0001-I0003,共9页
Objective:To investigate the golden-time-awareness of and the necessary actions in response to acute myocardial infarction among the general public.Methods:This study was conducted with the use of a descriptive resear... Objective:To investigate the golden-time-awareness of and the necessary actions in response to acute myocardial infarction among the general public.Methods:This study was conducted with the use of a descriptive research design and convenience sampling.A sample of 800 subjects,using self-structured knowledge questionnaires,was selected for data collection and analysis.The study was conducted at Dr.M.G.R.Educational and Research Institute,India,from February to November 2022.Awareness of myocardial infarction symptoms and intervention timeline(the golden time)was investigated.A multivariate logistic regression analysis was performed to identify the demographic factors affecting the recognition of the golden time of acute myocardial infarction.Results:A total of 800 subjects were included.Among the subjects,367(45.8%)were male,433(54.2%)were female,and 443(55.3%)participants failed to recognize the golden time.Our multivariate logistic regression analysis showed that people with a bachelor’s degree(OR=0.41,95%CI:0.23-0.74,P=0.03)and a high school level diploma(OR=0.55,95%CI:0.31-0.97,P=0.03)are more likely to know about myocardial infarction(golden time)than illiterate people.Additionally,people who are employed(OR=0.59,95%CI:0.41-0.85,P=0.05)are more likely to know about myocardial infarction(golden time)than those who are not.Conclusions:The majority of people in the awareness group realize that taking myocardial infarction patients to the hospital would be the best course of action.The unawareness of the ideal treatment window for myocardial infarction may cause a delay in seeking medical attention,which can lead to an increase in mortality and morbidity. 展开更多
关键词 Heart attack Intervention timeline SYMPTOMS TREATMENT Myocardial infarction Percutaneous coronary interven­tion
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Real Time Equilibrium Reconstruction Algorithm in EAST Tokamak
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作者 王华忠 罗家融 黄勤超 《Plasma Science and Technology》 SCIE EI CAS CSCD 2004年第4期2390-2394,共5页
The EAST (HT-7U) superconducting tokamak is a national project of China on fusion research, with a capability of long-pulse (- 1000 s) operation. In order to realize a long-duration steady-state operation of EAST, som... The EAST (HT-7U) superconducting tokamak is a national project of China on fusion research, with a capability of long-pulse (- 1000 s) operation. In order to realize a long-duration steady-state operation of EAST, some significant capability of real-time control is re-quired. It would be very crucial to obtain the current profile parameters and the plasma shapes in real time by a flexible control system. As those discharge parameters cannot be directly measured, so a current profile consistent with the magnetohydrodynamic equilibrium should be evaluated from external magnetic measurements, based on a linearized iterative least square method, which can meet the requirements of the measurements. The arithmetic that the EFIT (equilibrium fitting code) is used for reference will be given in this paper and the computational efforts are reduced by parametrizing the current profile linearly in terms of a number of physical parameters. In order to introduce this reconstruction algorithm clearly, the main hardware design will be listed also. 展开更多
关键词 equilibrium algorithm plasma shapes current profile minimum multiplica-tion EFIT
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Correlation of Abortus Imminence Cases in the First Trimester with Biochemical Markers 被引量:1
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作者 Küçükyurt Ayça Kubat Basat Dilara +2 位作者 Bingöl Bugra Berkan Artuğ Cansızlar Gülnihal İlhan Gülşah 《Open Journal of Obstetrics and Gynecology》 CAS 2023年第2期207-213,共7页
Objective: In this study, we compared the biochemical markers of imminent abortion, missed abortion, and healthy pregnant women in the first trimester to see if there were any differences. Materials and Methods: The s... Objective: In this study, we compared the biochemical markers of imminent abortion, missed abortion, and healthy pregnant women in the first trimester to see if there were any differences. Materials and Methods: The study method is prospective. Pregnant women who applied to the obstetrics clinic of Istanbul Training and Research Hospital between 01.04.22 and 31.10.22 were diagnosed with abortion imminens or missed abortion between 6 weeks and 12 weeks or had normal pregnancy follow-up, had no chronic diseases, and did not take magnesium and calcium supplements were included in the study. 20 pregnant women with missed abortion, 20 pregnant women with abortion imminens diagnosis and 20 normal pregnant women who met the criteria were included in the study. Magnesium (Mg), calcium (Ca), copper (Cu), zinc (Zn) and hemogram (CBC) levels were checked in pregnant women included in the study. Results: The Mg, Cu, Zn, and CBC values of the study participants’ women did not differ in a statistically significant way. When compared to pregnant women who had a normal pregnancy process, the difference in Ca value was found to be statistically substantially smaller in pregnant women who were diagnosed with abortion imminens and missed abortion. The findings of our study suggest that serum Ca levels be measured prior to conception or at the initial visit. Conclusion: Serum Ca levels were found to be significantly lower in the missed abortion group than in the abortus imminens and normal pregnant groups in our study (p 0.05). 展开更多
关键词 ABORtion Biochemical Markers CALCIUM Copper MAGNESIUM Missed Abor-tion Spontaneous Abortion Zinc
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生物科学与技术虚拟仿真实验教学中心的建设与应用 被引量:3
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作者 王甜 张大伟 +2 位作者 李佛生 熊莉 林宏辉 《生物学杂志》 CAS CSCD 北大核心 2024年第3期121-126,共6页
生物科学与技术虚拟仿真实验教学中心通过优秀科研项目转化以及与高新技术企业合作开发,建设了一批高质量的生物类虚拟仿真实验教学资源。多层次、多元化的资源为学生前沿科学知识学习、综合性科研训练和生物下游产业技术训练提供有利环... 生物科学与技术虚拟仿真实验教学中心通过优秀科研项目转化以及与高新技术企业合作开发,建设了一批高质量的生物类虚拟仿真实验教学资源。多层次、多元化的资源为学生前沿科学知识学习、综合性科研训练和生物下游产业技术训练提供有利环境,有效地实现教学模式的转变以及学科交叉知识的学习和延伸。全天候开放共享虚拟仿真实验教学平台,实现虚拟仿真实验教学软件、实验标准化视频、教学课件和测试题库等线上教学资源的有机整合,满足随时随地实验教学需求,支持了一系列的混合式线上线下实验教学课程开展。生物科学与技术虚拟仿真实验教学中心与国家级生物科学实验教学示范中心形成了“双中心”融合发展的创新人才培养实验教学体系,“虚实结合”的实验教学模式,提升了学生的综合科研能力与教师的业务水平,培养了满足社会需求的生物技术创新实践人才。 展开更多
关键词 虚拟仿真实验 实验教学资源 共享平台 虚实结合 人才培养
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Solidworks应用于《机械设计课程设计》课程教学 被引量:5
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作者 余丽 伍哲 +1 位作者 施冠羽 郭文勇 《机械设计与制造》 北大核心 2024年第1期20-22,29,共4页
在《机械设计课程设计》课程教学中引入计算机辅助设计软件Solidworks作为辅助教学手段,通过该软件特有的运动仿真功能,建立闭式齿轮传动、锥齿轮传动、开式齿轮传动、链轮绞盘机构的虚拟模型,装配各传动机构,检查、优化设计方案,实现... 在《机械设计课程设计》课程教学中引入计算机辅助设计软件Solidworks作为辅助教学手段,通过该软件特有的运动仿真功能,建立闭式齿轮传动、锥齿轮传动、开式齿轮传动、链轮绞盘机构的虚拟模型,装配各传动机构,检查、优化设计方案,实现了传动装置的运动仿真,完成了该锚机系缆装置的模拟设计,锻炼了学生的软件使用技能,增强了学生对理论知识的深入理解和应用,激发了学生对机械课程深入学习的兴趣,提高了学生的机械设计水平,同时有助于培养学生工程实践和综合应用能力,达到了预期的教学效果。 展开更多
关键词 机械设计课程设计 SOLIDWORKS 计算机辅助设计 课程教学 虚拟仿真 装配设计
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区域地震记录揭示的2023年甘肃积石山6.2级地震震源破裂过程 被引量:4
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作者 罗艳 朱音杰 高原 《地震》 CSCD 北大核心 2024年第1期189-194,共6页
基于有限断层模型反演方法,利用区域宽频带地震波形数据,反演了2023年12月18日甘肃临夏积石山6.2级地震的震源破裂过程,获得了积石山地震破裂滑动时空分布:此次地震是逆冲兼少量走滑型地震,破裂持续时间约为9 s,主体能量在前6 s释放,地... 基于有限断层模型反演方法,利用区域宽频带地震波形数据,反演了2023年12月18日甘肃临夏积石山6.2级地震的震源破裂过程,获得了积石山地震破裂滑动时空分布:此次地震是逆冲兼少量走滑型地震,破裂持续时间约为9 s,主体能量在前6 s释放,地震破裂主要沿断层走向向NW方向拓展,计算得到的标量地震矩为1.39×10^(18)N·m,相当于M_(W)6.02,破裂尺度约10 km左右,最大同震滑动量为35 cm。 展开更多
关键词 2023年积石山6.2级地震 震源破裂过程 滑动分布 有限断层
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西北地区草地贪夜蛾种群遗传多样性分析及治理策略 被引量:1
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作者 张大为 陈靖 +3 位作者 魏玉红 惠娜娜 郭致杰 罗进仓 《西北农业学报》 CAS CSCD 北大核心 2024年第2期312-320,共9页
旨在明确甘肃省草地贪夜蛾的入侵来源,并制定科学有效的防控对策。基于mtCOI基因分子标记分析中国草地贪夜蛾不同生态区8个省12个地理种群276个样品的遗传多样性指数、遗传分化系数及基因流等。结果表明,甘肃省草地贪夜蛾种群的单倍型... 旨在明确甘肃省草地贪夜蛾的入侵来源,并制定科学有效的防控对策。基于mtCOI基因分子标记分析中国草地贪夜蛾不同生态区8个省12个地理种群276个样品的遗传多样性指数、遗传分化系数及基因流等。结果表明,甘肃省草地贪夜蛾种群的单倍型多样性指数和平均核苷酸差异数分别为0.133~0.157与0.133~0.317,均低于中国周年繁殖区广东、广西、云南种群的0.157~0.819与1.033~7.705;所有种群的Tajima’s D中性检验和Fu’s F检验结果均为负值,表明草地贪夜蛾入侵中国后经历了明显的种群扩张事件。四川种群与其他种群遗传分化显著,62个种群间存在中等程度以上的基因交流。陕西略阳、陕西宁强、甘肃徽县、甘肃成县种群的有效迁入个体数和有效迁出个体数之和分别为11 860.66、11 708.65、10 878.66和10 379.32,在中国草地贪夜蛾的基因交流过程中具有中继站的作用,表明陕南汉水谷地为中国草地贪夜蛾西线北迁入侵西北的主要通道。 展开更多
关键词 mtCOI基因 草地贪夜蛾 遗传多样性 遗传分化 基因流
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论数字经济推动新质生产力形成的路径 被引量:28
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作者 焦方义 杜瑄 《工业技术经济》 CSSCI 北大核心 2024年第3期3-13,F0003,共12页
本文采用2013~2022年我国31个省(区、市)的面板数据,建立固定效应模型,从数据要素化、数字产业化、产业数字化、数字治理4个维度出发,实证检验了我国数字经济对新质生产力形成的影响及作用机制。研究发现,数字经济对新质生产力的形成有... 本文采用2013~2022年我国31个省(区、市)的面板数据,建立固定效应模型,从数据要素化、数字产业化、产业数字化、数字治理4个维度出发,实证检验了我国数字经济对新质生产力形成的影响及作用机制。研究发现,数字经济对新质生产力的形成有显著的正向影响,且在我国东部地区最为明显,中部地区次之,西部地区较为不明显。灰色关联度分析表明,战略性新兴产业和未来产业发展基础与我国新质生产力水平关联度最强。考察作用机制发现,数字产业化、产业数字化、数字治理是我国数字经济发展推动新质生产力形成的有效路径。大力发展数字化产业,促进数字技术创新;加快产业数字化转型升级,构建现代产业体系;提升数字治理能力,缩小新质生产力地区差距,成为推动我国新质生产力形成的重要政策启示。 展开更多
关键词 新质生产力 数字经济 数据要素化 数字产业化 产业数字化 数字治理
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高职院校科研平台服务地方效能评价体系建设研究 被引量:2
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作者 吴玺玫 曹明 宋志敏 《中国职业技术教育》 北大核心 2024年第1期79-86,95,共9页
科教融汇新战略要求高职院校必须高度重视科研平台建设实效。面对高职院校科研平台建设层次低、体量小,重数量、轻成效,重管理、轻评价的现实问题,选择科研平台服务地方发展效能研究评价标准,有助于明确科研平台发展方向,增强发展动力,... 科教融汇新战略要求高职院校必须高度重视科研平台建设实效。面对高职院校科研平台建设层次低、体量小,重数量、轻成效,重管理、轻评价的现实问题,选择科研平台服务地方发展效能研究评价标准,有助于明确科研平台发展方向,增强发展动力,拓展发展空间。以破除“五唯”分类评价,定性定量综合考量,科学容错理性评价为原则,从平台效能目标推导评价指标体系,多元化选定评价主体,从目标设定、机构运行、有效投入、创新产出、收益影响等维度分类设计评价指标和测评点,创新性构建了高职院校科研平台服务地方效能评价体系。 展开更多
关键词 高职院校 科研平台 建设效能 评价体系
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云南省蓝莓基质栽培发展现状及对策 被引量:1
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作者 苏泽春 杨燕林 +4 位作者 和加卫 杨正松 吴永斌 和志娇 余莹 《中国果树》 2024年第2期134-139,共6页
云南蓝莓凭借口感好、品质优、风味佳的优势一直备受消费者的青睐。云南省蓝莓采用基质栽培后,蓝莓产量、品质得到了进一步提升。截至2021年,云南省蓝莓种植面积已经突破6 667 hm^(2),产量约4.5万t。为了准确掌握云南省蓝莓基质栽培的... 云南蓝莓凭借口感好、品质优、风味佳的优势一直备受消费者的青睐。云南省蓝莓采用基质栽培后,蓝莓产量、品质得到了进一步提升。截至2021年,云南省蓝莓种植面积已经突破6 667 hm^(2),产量约4.5万t。为了准确掌握云南省蓝莓基质栽培的发展现状,云南省农业科学院高山水果创新团队调研了全省各个州(市)有代表性的种植企业、合作社、农民,通过查阅文献、实地调研等方式,分析了云南省蓝莓基质栽培发展现状、存在的主要问题,并提出了有关对策建议。 展开更多
关键词 蓝莓产业 基质栽培 发展现状 存在问题 对策建议
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中国竞技体操后备人才培养多元共治的影响因素研究 被引量:2
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作者 吕万刚 季彦霞 《成都体育学院学报》 CSSCI 北大核心 2024年第3期1-10,共10页
文章主要采用建构式案例研究方法,以扎根理论编码技术为辅助,对参与竞技体操后备人才培养治理的组织进行多案例分析,构建出竞技体操后备人才培养多元共治影响因素的理论框架。研究发现:竞技体操后备人才培养多元共治的影响因素包括价值... 文章主要采用建构式案例研究方法,以扎根理论编码技术为辅助,对参与竞技体操后备人才培养治理的组织进行多案例分析,构建出竞技体操后备人才培养多元共治影响因素的理论框架。研究发现:竞技体操后备人才培养多元共治的影响因素包括价值认同、资源投入、合作机制、组织能力和制度环境。其中,价值认同是实现竞技体操后备人才培养多元共治的原动力;资源投入和合作机制均对多元共治绩效产生正向的促进作用;组织能力和制度环境通过与其他因素产生交互作用而对竞技体操后备人才培养多元共治绩效产生正向的促进作用。 展开更多
关键词 竞技体操 后备人才 多元共治 影响因素 体教融合
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刈割对三尖叶猪屎豆养分积累与再生性的影响 被引量:1
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作者 赵志平 杨丽萍 +1 位作者 刘忠妹 杨春霞 《南方农业学报》 CAS CSCD 北大核心 2024年第1期169-178,共10页
【目的】探究三尖叶猪屎豆养分积累、再生性对刈割方式(刈割时期和频次)和留茬高度的响应,为橡胶园覆盖绿肥管理提供理论和技术指导。【方法】在树龄为3年的橡胶园中设12个处理:年刈割时期和频次为营养期刈割1次和2次、花期刈割1次,每... 【目的】探究三尖叶猪屎豆养分积累、再生性对刈割方式(刈割时期和频次)和留茬高度的响应,为橡胶园覆盖绿肥管理提供理论和技术指导。【方法】在树龄为3年的橡胶园中设12个处理:年刈割时期和频次为营养期刈割1次和2次、花期刈割1次,每个刈割时期和频次留茬高度为20.0、30.0、40.0和50.0 cm,监测不同刈割方式和留茬高度三尖叶猪屎豆的产量及干物质、氮、磷、钾、钙和镁积累量,以及刈割后1~4个月的萌发再生情况。【结果】刈割方式对三尖叶猪屎豆产量、干物质和养分积累量均具有显著影响(P<0.05,下同),营养期刈割2次/年处理三尖叶猪屎豆的产量、干物质和养分积累量均显著高于营养期刈割1次/年和花期刈割1次/年处理,产量分别提高102.44%~159.62%和54.96%~149.71%,干物质积累量分别提高103.19%~161.44%和50.46%~142.72%,氮积累量分别提高102.44%~159.62%和53.58%~209.70%,磷积累量分别提高100.44%~161.62%和-1.52%~65.73%,钾积累量分别提高101.42%~160.64%和-14.95%~108.59%,钙积累量分别提高104.42%~157.64%和46.65%~206.53%,镁积累量分别提高99.62%~155.44%和81.62%~223.57%。留茬高度对三尖叶猪屎豆产量、干物质和养分积累量具有显著影响,其中,花期刈割1次/年处理、留茬高度30.0 cm三尖叶猪屎豆的产量、干物质和养分积累量均最高;营养期刈割2次/年处理、留茬高度40.0 cm三尖叶猪屎豆的产量、干物质和养分积累量及再生性均最佳。方差分析结果表明,刈割方式和留茬高度及其互作,对猪屎豆的干物质和养分积累量均具有极显著影响(P<0.01)。【结论】刈割方式和留茬高度均显著影响三尖叶猪屎豆的产量、干物质和养分积累量及再生性。橡胶园间种三尖叶猪屎豆的最佳刈割方式为营养期刈割2次/年,留茬高度40.0 cm。 展开更多
关键词 三尖叶猪屎豆 刈割时期 刈割频次 留茬高度 产量 养分积累 再生性
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基于特征相似性和特征规范化的注意力模块 被引量:1
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作者 杜启亮 汪益民 田联房 《华南理工大学学报(自然科学版)》 EI CAS CSCD 北大核心 2024年第7期62-71,共10页
近年来,注意力机制在图像分类、目标检测和语义分割等领域取得了巨大成功,但现有的注意力机制大多只能在通道或空间维度上实现特征融合,这极大限制了其在通道和空间维度上变化的灵活性,导致无法充分利用特征信息。为此,文中提出一种基... 近年来,注意力机制在图像分类、目标检测和语义分割等领域取得了巨大成功,但现有的注意力机制大多只能在通道或空间维度上实现特征融合,这极大限制了其在通道和空间维度上变化的灵活性,导致无法充分利用特征信息。为此,文中提出一种基于特征相似性和特征规范化的、可同时利用特征图各维度信息的卷积神经网络注意力模块FSNAM。该模块由特征相似性模块(FSM)和特征规范化模块(FNM)两部分组成,FSM利用输入特征图的通道特征信息和局部空间特征信息生成一个二维的特征相似性权重图;FNM利用输入特征图的全局空间特征信息生成一个三维的特征规范化权重图;两个模块生成的权重图融合在一起,生成一个三维的注意力权重图,以此实现通道特征信息和空间特征信息的融合。为证明FSNAM的可行性和有效性,进行了消融实验,结果表明:在图像分类任务方面,FSNAM模块对分类网络在CIFAR数据集上的性能提升明显优于其他主流注意力模块;在目标检测任务方面,使用FSNAM模块的目标检测网络对VOC数据集中的小目标和中等大小目标的检测准确率分别提高了3.9和1.2个百分点;在语义分割任务方面,使用FSNAM模块可以提高HRNet模型的性能,在SBD数据集上模型的平均像素准确率提高了0.58个百分点。 展开更多
关键词 卷积神经网络 计算机视觉 特征相似性 特征规范化 注意力模块
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城市污水处理过程污泥膨胀识别与抑制综述 被引量:1
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作者 潘红光 张莹婷 +1 位作者 折洋洋 杨勇 《控制理论与应用》 EI CAS CSCD 北大核心 2024年第5期798-807,共10页
污泥膨胀是活性污泥法污水处理过程中常见的一类异常工况,且具有严重危害性,研究污泥膨胀的识别和抑制方法对城市污水处理过程正常运行意义重大.本文主要针对城市污水处理过程中污泥膨胀的识别和抑制方法进行综述.首先,文章概述了城市... 污泥膨胀是活性污泥法污水处理过程中常见的一类异常工况,且具有严重危害性,研究污泥膨胀的识别和抑制方法对城市污水处理过程正常运行意义重大.本文主要针对城市污水处理过程中污泥膨胀的识别和抑制方法进行综述.首先,文章概述了城市污水处理过程,介绍了污泥膨胀的概念、主要特点、类型和成因;其次,概述了基于微生物生理特征、机理模型、图像识别和数据驱动的污泥膨胀识别方法,分析其发展现状并指出优缺点;然后,概述了基于过程调控和机理特征的污泥膨胀抑制方法,分析其发展现状并对比优缺点;最后,总结全文,指出了城市污水处理过程污泥膨胀识别和抑制面临的主要问题,并对其研究趋势进行了展望. 展开更多
关键词 污泥膨胀 活性污泥法 城市污水处理过程 识别 抑制
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