作者:王永静; 陈增增 期刊:《生态经济》 2020年第02期
生态效率是权衡经济、资源和环境三者关系的科学评判手段,可定量分析研究区域的农业生态发展水平,为区域农业生态化协同发展提供借鉴之处。以天山北坡经济带为研究区域,采用Super–SBM模型和σ指数测度农业生态效率静态水平和区域差异的敛散性,并运用Global–Malmquist指数研究农业生态效率的动态变化,最后依据无效率分解模型厘清效率损失的原因并提出效率改进的路径。研究结果表明:农业生态效率整体水平不高,区域差异特征明显且呈...
作者:罗伯塔·罗曼诺; 沈伟; 陶永祺 期刊:《财经法学》 2016年第02期
This Article challenges the prevailing view of the efficacy of harmonized international financial regulation and provides a mechanism for facilitating regulatory diversity and experimentation within the existing global regulatory framework,the Basel Accords.Recent experience suggests that regulatory harmonization can increase,rather than decrease,systemic risk,an effect that is the precise oppos...
作者:Steven; Davidson 期刊:《财富生活》 2005年第12期
通过对标准普尔全球1200家企业《S&P Global 1200)近10年的增长及股东回报表现的数据分析,我们发现只有三分之一的公司在收入和股东总回报(TSR)方面的增长速度快于同行的平均水平。
作者:丁宇洁; 林顺生; 王洪松; 席本领; 高克洲; 王德威 期刊:《电力大数据》 2013年第11期
系统在井道里安装传感器,当井盖非法打开时,传感器将该井盖的GPS(GlobalPositionSystem全球定位系统)、GIS(GeographicInformationSystem地理信息系统)等数据发送到报警集中器,报警集中器通过GPRS(General—PacketRadioService通用分组无线业务)无线通讯网络将报警信息发送到监控中心或管理人员的手机上,并可以和110或12345联动。该系统具有实时性、快速性和准确性的特点。
作者: 期刊:《智能建筑与智慧城市》 2015年第06期
日前,作为全球安全身份识别解决方案领袖的HID Global,宣布了同RFI Communications &Security Systems一起完成了对Netflix?的第二次移动访问控制试验。RFI是全球领先的电视剧和电影互联网订阅服务公司,在成功地与其合作完成第一次Netflix项目后,HID和FRI的第二次Netflix?试验也已顺利启动,他们将移动访问控制带到了一个新的安全、便利的水平。
作者:来志新; 李洪庆; 来英会 期刊:《水利科学与寒区工程》 2006年第04期
全球卫星系统的英文是“Global Positioning System”,简称GPS系统。该系统是以卫星为基础的无线电导航定位系统,具有全能性(陆地、海洋、航空和航天)、全球性、全天候、连续性和实时性的导航、定位和定时的功能。能为各类用户提供精密的三维坐标、速度和时间。GPS卫星的基本参数是:卫星颗数为24颗,卫星轨道面个数为6,卫星高度为20200km。轨道倾角为55度,卫星运行周期为11小时58分(恒星时12小时),载波频率为1575.42MHz...
The 4th annual NextGen SCADA Global conference draws together SCADA system implementation Leaders and specialists from across the European electric utility landscape,for a review of 20+SCADA implementation casestudies.The programme begins with a SCADA System Integration Tutorial,followed by a 3-day main conference focused on NextGe n SCADA impleme ntation case studies,and con eludes on the fifth...
作者:Liu; Chong; Guo; Xiaobing; Sun; Bo; Deng; Menjia 期刊:《和平》 2019年第01期
In the year 2018,the United States adjusted its national defense strategy dictated by the major power competition,made tremendous efforts in areas such as nuclear,missile defense,outer space,artificial intelligence military applications,etc.,disclosed withdrawal from the INF Treaty,tried vigorously to reshape the absolute superiority,thus,having seriously impacted the strategic stability of majo...
作者:Myo; Yan; Naung; Them 期刊:《和平》 2018年第04期
Dear Distinguished Guests,It is a great honor for me to be here in the city of peace,to make a speech at the commemorative event for the International Day of Peace 2018.I am from Myanmar,from the ruling party which governs the country since the April 2016,so now two and half years in government.Before 2016,we were under the military regime for more than 50 years.I am the secretary of the central...
作者:Kleber; D.P.Cevallos 期刊:《和平》 2018年第04期
On behalf of Ecuador, I would like to extend my sincere greetings to our Chinese friends and thank you very much for inviting me to attend today’s event. I will never forget the warmth and friendliness of our Chinese friends.The Centre of Security and Defense of IAEN of Ecuador aims to promote peace,development and the active participation of various countries in global security governance.
作者:Editors; of; the; Contemporary; World; magazine 期刊:《和平》 2018年第03期
The first thematic symposium entitled Wanshou Dialogue on Global Security:the Current Situation in the Asia-Pacific Region sponsored by the Chinese People’s Association for Peace and Disarmament (CPAPD) was held in Beijing from June 20 to 21, 2018. More than50 experts and scholars from 19 countries,including the United States, Russia.
作者:Rabindra; Adhikari 期刊:《和平》 2018年第04期
Respected Chair,Distinguished Delegates,Champions and scholars of peace,Let me first congratulate the organizers for hosting such an important event, which has been shading light on various dimension of peace and current world order with an aim to building up world peace. Indeed this is a highly relevant event not just because of it’s subject but also the august gathering of peace campaigners f...
作者:刘胜旋; 高佩兰 期刊:《地质学刊》 2015年第04期
Global Mapper支持多种格式的光栅、高程、矢量数据的读取与输出,并内置多种坐标投影方式。尝试挖掘其支持多种数据格式、多种投影模式的功能,快速实现测绘图形数据的转换。通过设置当前工作空间的坐标投影模式,然后打开任何其支持的、含有坐标投影信息的数据,所有数据均自动转换成当前的投影模式,最后将文件输出(另存为)为所需的格式,即可快速完成数据转换。转换的内容主要包括不同格式的DTM(Digital Terrain Model,数字地面模...
城市及其周边地区的农业和林业在保障城市贫困人口的食品供应、城市绿化、城市气候改善、促进城市有机废物生产性再利用,以及降低城市能源足迹方面能够发挥重要的作用.在非洲、加勒比和太平洋国家召开的城市挑战和减贫国际会议上,与会者也认可了农业和林业在改善城市环境及提高城市气候变化应对能力方面所具有的巨大潜力(联合国人居署,2009年).
作者:Devanand; Ramiah 期刊:《一带一路报道》 2019年第05期
The global economy is facing both expanding opportunities and rising challenges, including the increasing gap in financing needed for development worldwide. The United Nations Development Programme holds the 2030 Agenda for Sustainable Development and its Sustainable Development Goals at the core of its mandate and welcomes all efforts that have the potential to accelerate their achievements on ...
作者:陈红亮; 李小平 期刊:《数学季刊》 2018年第04期
In this paper, we consider a stochastic non-autonomous Schoener competitive system. Firstly, we prove the existence of positive periodic solution when the coefficients of Schoener competitive system satisfied certain conditions. Then the global attractiveness of positive periodic solution is also proved by constructing appropriate Lyapunov function. In addition, we show that the stronger noises ...
作者:BAI; Hong-fang; XU; Rui 期刊:《数学季刊》 2017年第04期
In this paper, a stochastic predator-prey model with stage structure for predatorand ratio-dependent functional response is concerned. Sufficient conditions for the globalasymptotic stability of positive equilibrium are established. Some numerical simulations arecarried out to illustrate the theoretical results.
作者:高建忠; 张太雷 期刊:《数学季刊》 2019年第01期
In this paper, an SEIRS epidemic model with pulse vaccination and two time delays is proposed. By using stroboscopic map and comparison principle, the disease-free periodic solution(DFPS for short) is obtained and the global asymptotic stability of the DFPS is proved. The sufficient conditions for the permanence of the model are obtained. In addition, numerical simulations are done to confirm ou...
作者:Hua; CHEN; Hui; Yang; XU 期刊:《数学学报》 2019年第07期
In this paper, we study the initial-boundary value problem for the semilinear pseudoparabolic equations ut —△xut —△xu =|u|^p-1u, where X =(X1, X2,..., Xm) is a system of real smooth vector fields which satisfy the Hormander's condition, and △x =∑j=1^m Xj^2 is a finitely degenera te elliptic operator. By using potential well method, we first prove the invariance of some sets and vacuum isol...
作者:Myong-Hwan; RI 期刊:《数学学报》 2019年第08期
We present some regularity criteria for the Leray–Hopf weak solutions to the Cauchy problem for 3D Navier–Stokes equations based on energy distribution at wavenumber bands. We show sufficient conditions for regularity based on the ratios of energy dissipation rates at sufficiently high wavenumber bands and neighboring medium wavenumber bands. Moreover, we give a regularity criterion based on r...