The cold regions are located in high latitudes and cold climates.The local excellent ornamental plant resources are relatively scarce.The plant species that are suitable for both ornamental and productive benefits of ...The cold regions are located in high latitudes and cold climates.The local excellent ornamental plant resources are relatively scarce.The plant species that are suitable for both ornamental and productive benefits of landscape of flower sea construction are also even fewer.Therefore,it is imperative to introduce and screen the plant resources suitable for cold regions to create the landscape of flower sea.The rape,an oilseed crop,was used as a research object in order to create a productive flower landscape with both ornamental and economic values in cold regions.Four rape flower varieties,Qingza No.5,7,9,and 11,were introduced from Qinghai Hufeng Agricultural Science and Technology Group Co.,Ltd.They were planted in the experimental practice base of Northeast Agricultural University in three batches.Development characteristics and seed yield of rape flowers on different sowing dates were studied.The fuzzy probability method was used to comprehensively evaluate the varieties.The results showed that the rape flowers grew well in Harbin City during the experimental sowing period,which could form a good landscape of flower sea and had a considerable rapeseed yield.It could be widely used in cold urban and rural areas,such as Harbin City.In view of the experimental results,the strategies of creating a productive landscape of rape flower sea were proposed and the economic benefits were analyzed.It could change the status quo of a uniform landscape of flower sea in cold regions,help the development of rural tourism,and promote local economic income.展开更多
This paper takes the synthesizing evaluation about industrial economic benefits by examples and proposes a new method named maximizing deviation method for multiindices decision. The new method can automatically deter...This paper takes the synthesizing evaluation about industrial economic benefits by examples and proposes a new method named maximizing deviation method for multiindices decision. The new method can automatically determine the weight coefficients among the multiindices and also can obtain the exact and reliable evaluation results without subjectivity.展开更多
This paper takes the evaluation of overall economic benefit by an example and proposes a simple additive weighting method for time-series multiindices decision making. The method can automatically determine the weight...This paper takes the evaluation of overall economic benefit by an example and proposes a simple additive weighting method for time-series multiindices decision making. The method can automatically determine the weight coefficients among the multiindices and the years respectively and it also can obtain the objective evaluation results and conclusions.展开更多
Natural grassland in the West of Northeastern China is located in 40°0′- 43°5′N latitude and 117°0′ -127°5′Elongitude. It lies in the Liao River Valley, the Songhua River Valley and Nen River V...Natural grassland in the West of Northeastern China is located in 40°0′- 43°5′N latitude and 117°0′ -127°5′Elongitude. It lies in the Liao River Valley, the Songhua River Valley and Nen River Valley. About 130 years ago, this region had rich natural grassland resources, was numerically 26.67 millions in hectare of grasslands. Since the last stage of Qing Dynasty, the grassland has been destroyed seriously in 3 times. Up to now, this region only preserved about 2 millions in hectare of the grasslands. In addition, 3.33 millions in hectare of the grasslands have changed from primary grassland to desertification, salinizatio-nalkalinization and degeneration grasslands in the form of patches of bare soil(their simple form of a name is'3 kinds of degeneration grasslands'). This paper indicaed that in any period both grasslands destruction and its restoration were relevant to economic changes and economic systems, particularly to market econmy in that time. The following agricultural economic-technological strategies have been applied to transform of retrogressive grasslands: ① to return reclaimed grassland as farmland to primary grassland in order to greatly increase-economic ecological benefits; ② to close desertification, salinizationalkalinization and degradation grasslands in the form of patches of bare soil; ③to develop grassland-agriculture for establishment of stable production bases of concentrated feed crops and coarse herbage crops.展开更多
交通基础设施对城市经济发展具有强大的推动作用,尤其是大型交通基础设施的建设,对土地利用和空间形态产生重大影响。针对城市交通基础设施广义经济效益评估分析需求,本文提出基于城市经济-土地利用-交通整体规划(Urban-Integrated Econ...交通基础设施对城市经济发展具有强大的推动作用,尤其是大型交通基础设施的建设,对土地利用和空间形态产生重大影响。针对城市交通基础设施广义经济效益评估分析需求,本文提出基于城市经济-土地利用-交通整体规划(Urban-Integrated Economy, Land Use, and Transport, U-IELUT)建模的交通基础设施广义经济效益评估框架和方法。在传统“四阶段”交通规划模型的基础上,加入城市经济和人口预测、社会经济活动空间分配、城市空间开发,以及交通基础设施广义经济效益评估模块,构建面向交通基础设施广义经济效益评估的“PECAS+(Production, Exchange and Consumption Allocation System)”广义经济效益评估模型。以武汉地铁2号线为例,基于武汉“PECAS+”广义经济效益评估模型测算其直接经济效益和广义经济效益。结果表明,地铁2号线在2027年的直接经济效益约为10.43亿元;广义经济效益中,动态集聚效益约为2.64亿元,约为直接经济效益的25.3%,说明广义经济效益尤其是集聚效益等带来的经济效益不可忽略。同时,还探明交通基础设施建设对不同小区的影响差异,即广义经济效益的空间分布,可为交通基础设施投资建设提供多维度决策支持。展开更多
随着大量分布式能源的并网,能源互联网面临严重的网络攻击威胁。攻击者可利用通信层的漏洞,集成庞大的分布式僵尸网络。现有的网络攻击手段难以适配具有随机空间分布特性的僵尸网络,并且多侧重攻击的破坏性而忽视了对攻击隐蔽性的研究...随着大量分布式能源的并网,能源互联网面临严重的网络攻击威胁。攻击者可利用通信层的漏洞,集成庞大的分布式僵尸网络。现有的网络攻击手段难以适配具有随机空间分布特性的僵尸网络,并且多侧重攻击的破坏性而忽视了对攻击隐蔽性的研究。该文提出了从分布式僵尸网络实现对综合能源系统经济效益破坏的新型攻击方法。首先,建立基于僵尸节点的重要对象拒绝服务(denial of service,DoS)攻击模型,通过信息收集判断邻域中重要程度最高的节点,并推导出在有限攻击资源下影响DoS攻击效果的显式因素。其次,提出僵尸节点间的共谋虚假数据注入(false data injection,FDI)攻击策略,并分析不同的FDI攻击实现形式,旨在寻找对能源系统经济性最具破坏性的攻击模式。考虑典型的恶意节点检测机制,制定了僵尸节点自调节过程,使得攻击的实现对防御措施具有鲁棒性。最后,通过IEEE39-32节点的热电耦合系统拓扑仿真验证了所提攻击策略的有效性。展开更多
基金the National Nature Science Foundation of China(31770437)。
文摘The cold regions are located in high latitudes and cold climates.The local excellent ornamental plant resources are relatively scarce.The plant species that are suitable for both ornamental and productive benefits of landscape of flower sea construction are also even fewer.Therefore,it is imperative to introduce and screen the plant resources suitable for cold regions to create the landscape of flower sea.The rape,an oilseed crop,was used as a research object in order to create a productive flower landscape with both ornamental and economic values in cold regions.Four rape flower varieties,Qingza No.5,7,9,and 11,were introduced from Qinghai Hufeng Agricultural Science and Technology Group Co.,Ltd.They were planted in the experimental practice base of Northeast Agricultural University in three batches.Development characteristics and seed yield of rape flowers on different sowing dates were studied.The fuzzy probability method was used to comprehensively evaluate the varieties.The results showed that the rape flowers grew well in Harbin City during the experimental sowing period,which could form a good landscape of flower sea and had a considerable rapeseed yield.It could be widely used in cold urban and rural areas,such as Harbin City.In view of the experimental results,the strategies of creating a productive landscape of rape flower sea were proposed and the economic benefits were analyzed.It could change the status quo of a uniform landscape of flower sea in cold regions,help the development of rural tourism,and promote local economic income.
文摘This paper takes the synthesizing evaluation about industrial economic benefits by examples and proposes a new method named maximizing deviation method for multiindices decision. The new method can automatically determine the weight coefficients among the multiindices and also can obtain the exact and reliable evaluation results without subjectivity.
文摘This paper takes the evaluation of overall economic benefit by an example and proposes a simple additive weighting method for time-series multiindices decision making. The method can automatically determine the weight coefficients among the multiindices and the years respectively and it also can obtain the objective evaluation results and conclusions.
文摘Natural grassland in the West of Northeastern China is located in 40°0′- 43°5′N latitude and 117°0′ -127°5′Elongitude. It lies in the Liao River Valley, the Songhua River Valley and Nen River Valley. About 130 years ago, this region had rich natural grassland resources, was numerically 26.67 millions in hectare of grasslands. Since the last stage of Qing Dynasty, the grassland has been destroyed seriously in 3 times. Up to now, this region only preserved about 2 millions in hectare of the grasslands. In addition, 3.33 millions in hectare of the grasslands have changed from primary grassland to desertification, salinizatio-nalkalinization and degeneration grasslands in the form of patches of bare soil(their simple form of a name is'3 kinds of degeneration grasslands'). This paper indicaed that in any period both grasslands destruction and its restoration were relevant to economic changes and economic systems, particularly to market econmy in that time. The following agricultural economic-technological strategies have been applied to transform of retrogressive grasslands: ① to return reclaimed grassland as farmland to primary grassland in order to greatly increase-economic ecological benefits; ② to close desertification, salinizationalkalinization and degradation grasslands in the form of patches of bare soil; ③to develop grassland-agriculture for establishment of stable production bases of concentrated feed crops and coarse herbage crops.
文摘交通基础设施对城市经济发展具有强大的推动作用,尤其是大型交通基础设施的建设,对土地利用和空间形态产生重大影响。针对城市交通基础设施广义经济效益评估分析需求,本文提出基于城市经济-土地利用-交通整体规划(Urban-Integrated Economy, Land Use, and Transport, U-IELUT)建模的交通基础设施广义经济效益评估框架和方法。在传统“四阶段”交通规划模型的基础上,加入城市经济和人口预测、社会经济活动空间分配、城市空间开发,以及交通基础设施广义经济效益评估模块,构建面向交通基础设施广义经济效益评估的“PECAS+(Production, Exchange and Consumption Allocation System)”广义经济效益评估模型。以武汉地铁2号线为例,基于武汉“PECAS+”广义经济效益评估模型测算其直接经济效益和广义经济效益。结果表明,地铁2号线在2027年的直接经济效益约为10.43亿元;广义经济效益中,动态集聚效益约为2.64亿元,约为直接经济效益的25.3%,说明广义经济效益尤其是集聚效益等带来的经济效益不可忽略。同时,还探明交通基础设施建设对不同小区的影响差异,即广义经济效益的空间分布,可为交通基础设施投资建设提供多维度决策支持。
文摘随着大量分布式能源的并网,能源互联网面临严重的网络攻击威胁。攻击者可利用通信层的漏洞,集成庞大的分布式僵尸网络。现有的网络攻击手段难以适配具有随机空间分布特性的僵尸网络,并且多侧重攻击的破坏性而忽视了对攻击隐蔽性的研究。该文提出了从分布式僵尸网络实现对综合能源系统经济效益破坏的新型攻击方法。首先,建立基于僵尸节点的重要对象拒绝服务(denial of service,DoS)攻击模型,通过信息收集判断邻域中重要程度最高的节点,并推导出在有限攻击资源下影响DoS攻击效果的显式因素。其次,提出僵尸节点间的共谋虚假数据注入(false data injection,FDI)攻击策略,并分析不同的FDI攻击实现形式,旨在寻找对能源系统经济性最具破坏性的攻击模式。考虑典型的恶意节点检测机制,制定了僵尸节点自调节过程,使得攻击的实现对防御措施具有鲁棒性。最后,通过IEEE39-32节点的热电耦合系统拓扑仿真验证了所提攻击策略的有效性。
