检索结果-南通市图书馆

A Plant Programming of the Main Food Crops in china

在线全文

学校读者我要写书评

暂无评论

A Plant Programming of the Main Food Crops in China

Chinese Stroke center Alliance:a national effort to improve healthcare quality for acute stroke and transient ischaemic attack:rationale,design and preliminary findings

亚洲精细农业与计算机农业应用联合大会

作者： Yaxiong Chen Rui Guo Wenlong Zhao Weihong Zhou Chaojie Jia Guojun Sun MOE Key Laboratory of Arid and Grassland Ecology School of Life Science Lanzhou university Lanzhou Gansu Province P.R. china 730000

china, like most developing countries, face great challenges from its huge populations, ensuring food security have always been vital because the Chinese government that still thinks of grain as the basis of national economy and political stability. As the farming area is not increased, it is a premier solution to make the best of arable land to increase food production per unit area. However, a number of agricultural lands are not reasonable used. The rational plant programming can not only achieve the optimal use of arable land, and maximize food production and increase economic benefits, but also limit the environment problems which come from the agricultural production of depending on the chemical pesticides and fertilizers. In this study, we collect data of environmental conditions and winter wheat growth associated factors, then, by using the GIS technology we establish spatial database of regional weather, topography, and soil conditions. With GIS-based multi-criteria evaluation （MCE）, maps of the potential distribution of main crops are established. Compared with these maps, the plant programming map is worked out. The area that should be plant common oat was 1 067 844ha, should be plant naked oat was 1 235 643ha, should be planted potato was 1 297 876ha, should be plant spring maize was 2 035 188ha, should be plant spring wheat was 747 329ha, should be plant summer maize was 2 503 685ha and should be plant winter wheat was 1 119 270ha. （Some areas that are located in cross-zone may be suitable for two or more than two crops growth, that is, these crops have the same levels of suitability that was more suitable than the others.） Basing on the plant programming, local farmers are free to choose which kind of crop cultivated. The plant programming of the main food crops in china would be guide for the Government’s macro-control and farmers’ investment, then, the return of investment would be raise and the blind investment would be avoided.

关键词： plant programming MCE suitable area for crops

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Stroke & Vascular Neurology 2018年第4期3卷 256-262页

作者： Yongjun Wang Zixiao Li Yilong Wang Xingquan Zhao Liping Liu Xin Yang Caiyun Wang Hongqiu Gu Fuying Zhang Chunjuan Wang Ying Xian David Z Wang Qiang Dong Anding Xu Jizong Zhao Chinese Stroke center Alliance investigators china National Clinical Research center for Neurological Diseases BeijingChina Tiantan Clinical Trial and Research center for Stroke Department of NeurologyBeijing Tiantan HospitalCapital Medical UniversityBeijingChina Vascular Neurology Department of NeurologyBeijing Tiantan HospitalCapital Medical UniversityBeijingChina center for Stroke Beijing Institute for Brain DisordersBeijingChina beijing Key Laboratory of Translational Medicine for Cerebrovascular Disease BeijingChina Neuro-intensive Care Unit Department of NeurologyBeijing Tiantan HospitalCapital Medical UniversityBeijingChina Office of Chinese Stroke center Alliance Chinese Stroke AssociationBeijingChina Department of Neurology Duke University Medical CenterDurhamNorth CarolinaUSA INI Stroke Network OSF Healthcare SystemUniversity of Illinois College of MedicinePeoriaIllinoisUSA Department of Neurology Shanghai Huashan HospitalFudan UniversityShanghaiChina Department of Neurology The First Affiliated Hospital of Jinan UniversityGuangzhouChina Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityBeijingChina 不详

Background In June 2015,the Chinese Stroke Association(CSA)initiated the Chinese Stroke center Alliance(CSCA)to establish the national hospital-based stroke care quality assessment and improvement *** article outlines its objectives,operational structure,patient population,quality improvement(QI)intervention tools,data elements,data collection methodology and current patient and hospital *** The CSCA is a national,hospital-based,multicentre,voluntary,multifaceted intervention and continuous QI *** multifaceted intervention includes stroke centre development,written care protocols,workshops and a monitoring/feedback system of evidencebased performance *** data coordinating centre of the CSCA resides at the china National Clinical Research center for Neurological Diseases,beijing Tiantan *** As of July 2017,1576 hospitals in china have contributed detailed clinical information to serve as a benchmark for the stroke care quality of 433264 patients with acute stroke/transient ischaemic attacks(TIA),including 352572(81.38%)acute ischaemic stroke,30362(7.01%)TIA,42080(9.71%)spontaneous intracranial haemorrhage,5505(1.27%)subarachnoid haemorrhage and 2745(0.63%)not specified *** The CSCA programme is designed to establish a continuous national stroke registry and help healthcare providers develop stroke centres and treat patients in a consistent manner in accordance with accepted national guidelines and,ultimately,improve patient *** supports the CSA mission to reduce stroke burden in china.

关键词： centre Alliance transient

量子阱半导体激光器调制特性和噪声的电路模拟

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

通信学报 2001年第1期22卷 38-42页

作者：毛陆虹郭维廉陈弘达吴荣汉天津大学电子与信息工程学院天津300072 中国科学院半导体研究所北京100083

给出一种量子阱半导体激光器 (QWLD)小信号等效电路模型 ,可以作为含有QWLD系统计算机辅助设计的模型。模型包括QWLD的高速调制特性和噪声 ,对QWLD的调制特性和噪声进行了模拟 ,并对比了已发表的模拟和实验结果。

关键词：量子阱半导体激光器电路模型调制噪声

在线全文

学校读者我要写书评

暂无评论

垃圾邮件的智能过滤系统设计探讨

微机发展 2003年第4期13卷 1-3页

作者：刘洋杜孝平黄星华侯志辉郭晨周二胜骆焕林重庆邮电学院重庆400065 北京大学信息科学中心视觉与听觉国家重点实验室北京100871 南京大学计算机科学与技术系第二研究室江苏南京210093

Internet的迅速发展,电子邮件的应用变得十分广泛,但是许多无用、有害信息随之而来。通过对垃圾邮件的分析、处理,设计了"基于用户个性化兴趣"的垃圾邮件智能过滤概念系统,首次提出将邮件向量同规则向量统一定义,有选择地进行二次过滤... 详细信息

Internet的迅速发展,电子邮件的应用变得十分广泛,但是许多无用、有害信息随之而来。通过对垃圾邮件的分析、处理,设计了"基于用户个性化兴趣"的垃圾邮件智能过滤概念系统,首次提出将邮件向量同规则向量统一定义,有选择地进行二次过滤等理论。功能设计完善,证明了其思想优于目前的某些主流邮件过滤系统。

关键词：垃圾邮件智能过滤系统设计电子邮件网络资源邮件服务器计算机网络 Internet

Researches of Optimum Shoot and Ramification Number Dynamic Models for Rapeseed （Brassica napus L.）

在线全文

学校读者我要写书评

暂无评论

Researches of Optimum Shoot and Ramification Number Dynamic ...

Improving a method for evaluating alfalfa cultivar resistance to thrips

亚洲精细农业与计算机农业应用联合大会

作者： CAO Hong-Xin 1 , ZHANG Chun-Lei 2 , LI Guang-Ming 2 , ZHANG Bao-Jun 3 , ZHAO Suo-Lao 3 , WANG Bao-Qing 3 , JIN Zhi-Qing 1 , ZHU Da-Wei 1 , ZHU Juan-Juan 3 , WEI Xiu-Fang 1 1 Institute of Agricultural Resources and Environment Research/Engineering Research center for Digital Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu 2 Institute of Oil Crops Research, Chinese Academy of Agricultural Sciences, Wuhan 430062, Hubei 3 Northwest Sci-Tech university of Agriculture and Forestry, Yangling 712100, Shaanxi, china

The objectives of this studies were to develop the optimum shoot and ramification number dynamic models for rapeseed （OSRNDMR）, and to lay an foundation for Rapeseed Cultivation Simulation-Optimization-Decision Making System （Rape-CSODS）,which can design its planting, regulate and control its growth and development, and fulfill its high yield, good quality, high benefits and standard production eventually. The OSRNDMR were developed based on field experiments with 4 cultivars, 6 sowing dates, 2 fertilizing levels and 2 sites from 2002 to 2008 in middle and lower valley of Yangtze River in china, relative data from references of rapeseed researches, and ideas of R/WCSODS （Rice/Wheat Cultivation Simulation-Optimization-Decision Making System）. In the same time, the OSRNDMR and its parameters also were assessed, calibrated and tested. Multi-factors such as ramification types, cultivars, and light etc. were responsed in the models, which make models to have general, objectives, mechanism, and dynamiccharacteristics, and to be used in different regions, ramification types, cultivars, and yield levels.

关键词： rapeseed optimum shoot and ramification number dynamic models

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2016年第3期15卷 600-607页

作者： TU Xiong-bing FAN Yao-li JI Ming-shan LIU Zhong-kuan XIE Nan LIU Zhen-yu ZHANG Ze-hua State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing 100193 P.R. China College of Plant Protection/Biopesticide Engineering Research center of Liaoning Province Shenyang Agricultural University Shenyang 110161 P.R. China Institute of Agro-Resourse and Environment Hebei Academy of Agriculture and Forestry Sciences Shijiazhuang 050051 P R. China

The thrips quantity ratio（TQR） model is an important tool for evaluating crop resistance to thrips based on the correlation between thrips quantities and cultivars. Unfortunately, it is inaccurate, and the results appear significantly inconsistent when analysing the same cultivars in the same field study. To improve this model, we first studied the resistance of 28 alfalfa cultivars to thrips in Cangzhou, Hebei Province, north china. The results showed that the most suitable evaluation period was from May to June, as the thrips population was stable during this period. Second, we found that the natural enemy population was significantly positively correlated with the thrips population density（R=0.7275, P〈0.0001）, which might influence resistance estimation. Hence, we introduced a parameter ‘α＇, corresponding to the natural enemy quantity ratio, to eliminate the effect of the natural enemy using ＂αTQR＂. Using the improved method, 28 cultivars were clustered into three classes： the resistant class, sensitive class, and median class. All numerical values were calculated for αTQR displayed as a Gaussian distribution. This information showed that all data should be divided into nine groups using a median value of 1±0.1 with an equal difference of 0.1. Based on the new standard cultivars, Gongnong 1, Alfaking, Cangzhou and Algonquin were classified as highly resistant cultivars; Zhongmu 3, Gongnong 2, Zhongmu 1 and Zhongmu 2 were classified in the resistant group; Queen was classified in the moderately resistant group; Derby, WL354HQ, KRIMA, Apex, 53 HR, SARDI 5 and Farmers Treasure were classified in the median class; WL319HQ, WL343HQ and Sitel were classified as the low sensitive group; WL440 HQ and SARDI7 as the moderately sensitive group; WL168HQ and Sanditi as the sensitive group; and SARDI 10, WL363HQ, FD4, WL323 and SOCA as the highly sensitive group.

关键词： thrips quantity ratio(TQR) model alfalfa cultivar resistance thrips natural enemy

在线全文

学校读者我要写书评

暂无评论

北京市减重与代谢外科专业现状调研

中华外科杂志 2023年第10期61卷 913-919页

作者：北京市减重与代谢外科质量控制和改进中心张忠涛田沛荣陶泊羽李梦伊刘洋张鹏不详首都医科大学附属北京友谊医院普外科北京100050 首都医科大学附属北京友谊医院

目的调研北京市范围内各医院减重与代谢外科的专业现状, 为促进医疗同质化发展、规范诊疗行为和持续改进医疗质量提供依据。方法本调研于2022年9月对参与北京市减重与代谢外科质量控制和改进中心的27家已开展减重代谢手术的医院进行问... 详细信息

目的调研北京市范围内各医院减重与代谢外科的专业现状, 为促进医疗同质化发展、规范诊疗行为和持续改进医疗质量提供依据。方法本调研于2022年9月对参与北京市减重与代谢外科质量控制和改进中心的27家已开展减重代谢手术的医院进行问卷调查, 并对结果做统计描述分析。问卷内容包括医疗机构基本情况、专科科室情况、减重代谢手术开展情况。结果 27家医院中, 4家(14.8%)减重与代谢外科专业已独立成科。用于减重与代谢外科的床位234张, 从事减重与代谢外科的医师126名。22家设立减重与代谢外科专病或多学科团队门诊, 11家医院共设立个案管理师岗位14个。2021年1家医院手术量≥500例, 3家为200~<500例, 2家为100~<200例, 3家为50~<100例, 6家为20~<50例, 12家<20例。26家医院在该年度开展了胃袖状切除术, 16家开展了Roux-en-Y胃旁路术, 3家开展了单吻合口胃旁路术, 1家开展了胆胰分流十二指肠转位术, 1家开展了单吻合口十二指肠转位术;6家开展了减重代谢手术后的修正手术, 4家开展了机器人辅助减重代谢手术。同时, 15家医院已加入大中华减重代谢手术数据库。结论北京市减重与代谢外科正处于发展过程中, 尚需明确手术在肥胖症及代谢疾病治疗中的地位与角色, 确定手术治疗相关疾病的理念与目标, 建立相应的手术规范。

关键词：肥胖症糖尿病 2型减重手术质量控制问卷调查

The research for missile bullets'multiple targets of opto-electronic theodolites

在线全文

学校读者我要写书评

暂无评论

The research for missile bullets'multiple targets of opto-el...

改进型支持度函数的WSN水质监测数据融合方法

2010 International Conference on Computer,Mechatronics, Control and Electronic Engineering (CMCE 2010)

作者： Zhu Wei Changchun institute of Optics,Fine Mechanics and Physics,CAS.Changchun,china Liu Yu-han Changchun institute of Optics,Fine Mechanics and Physics,CAS.Changchun,china

The system of opto-electronic theodolites for measuring missile bullet provides parameter of missile bullet trajectory and affords primacy scientific data for completing campaign assign and obtaining ideal result of *** article researches extraction arithmetic for missile bullet' multiple *** all,adopting OSTU method change numeral image into binary image,and abstract separately center position of targets and area of targets,at the same time,mark target region;enactment threshold of area,according to area of target,judge conglutination and obstruct;then separate targets in term of wave crest and trough's variety of grey histogram of conglutination region;obtain grey average of target;acquire middle axes of target by adopting Hough transforming and approximating and calculate obliquity angles of *** course of matching,forecast searching region of target matching by using Kalman filter;accomplish missile bullet's multiple targets data association of serial images by making use of improving eigenfunction and achieve extraction of missile bullet's multiple targets after obtaining center position of targets,area of targets,grey average of target and obliquity angles of *** experimental result shows that right ratio of the extraction targets reach to 90%.The article use correct mathematical model and reasonable arithmetic and obtain effectively parameter of missile bullet' multiple targets.

关键词： Opto-electronic theodolite missile bullet' multiple targets OSTU method Kalman filter

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

农业工程学报 2020年第16期36卷 192-200页

作者：匡亮施珮季云峰平震宇陈北京江苏信息职业技术学院物联网工程学院无锡214153 南京信息工程大学计算机与软件学院南京210044 中国水产科学研究院淡水渔业研究中心农业部淡水渔业和种质资源利用重点实验室无锡214081 江南大学物联网工程学院无锡214122

无线传感网络已被广泛应用到水质监测领域中,针对水质监测中对传感器数据高精度的要求,该研究提出一种基于支持度函数的数据融合算法。首先,对各传感器采集的数据进行一致性检测,保证数据的准确性;其次,采用改进的动态时间弯曲距离(Impr... 详细信息

无线传感网络已被广泛应用到水质监测领域中,针对水质监测中对传感器数据高精度的要求,该研究提出一种基于支持度函数的数据融合算法。首先,对各传感器采集的数据进行一致性检测,保证数据的准确性;其次,采用改进的动态时间弯曲距离(Improved Dynamic Time Warping Distance,IDTW)对支持度函数(Support Function,SF)进行优化,实现水质参数时间序列数据间的互支持度计算;最后,通过加权算法完成数据的融合过程,实现错误数据的校正,获得高质量融合数据。该算法在水质监测平台中进行了试验,结果表明,IDTW-SF融合算法的平均绝对误差值为0.2792%,融合精度较其他对比算法更高,且运行速度较快。IDTW-SF支持度融合算法能够有效弥补现有水质监测系统数据采集准确率低、效率低等缺陷,基于此方法的水质监测系统提高了溶解氧数据准确率,在降低水产养殖风险,提高养殖效率等方面发挥重要作用。

关键词：水质监测数据融合无线传感器网络支持度函数动态时间弯曲距离