Interpretation results of RS images were taken as the foundation, ETM RS images of July 15, 2009 as the data source, ENVI was applied for the preprocessing, Arc GIS used to finish the interpretation, master data obtai...Interpretation results of RS images were taken as the foundation, ETM RS images of July 15, 2009 as the data source, ENVI was applied for the preprocessing, Arc GIS used to finish the interpretation, master data obtained, and VB used to complete program development. 12 representative landscape pattern indexes were selected, Excel data used to create Access database, and VB used to complete the program development. Selection of landscape pattern indexes, program development process and program usage were summarized, through comparing its results with Excel calculation results, it was found that calculation results of this program were correct, the usage was convenient, so needs of most users could be satisfied.展开更多
The Chinese government adopted six ecological restoration programs to improve its natural environments. Although these programs have proven successful in improving local environments, some studies have questioned thei...The Chinese government adopted six ecological restoration programs to improve its natural environments. Although these programs have proven successful in improving local environments, some studies have questioned their performance when regions suffer from drought. Whether we should consider the effects of drought on vegetation change in assessments of the benefits of ecological restoration programs is unclear. Therefore, taking the Grain for Green Program(GGP) region as a study area, we estimated vegetation growth in the region from 2000–2010 to clarify the trends in vegetation and their driving forces. Results showed that: 1) vegetation growth increased in the GGP region during 2000–2010, with 59.4% of the area showing an increase in the Normalized Difference Vegetation Index(NDVI). This confirmed the benefits of the ecological restoration program. 2) Drought can affect the vegetation change trend, but human activity plays a significant role in altering vegetation growth, and the slight downward trend in the NDVI was not consistent with the severity of the drought. Positive human activity led to increased NDVI in 89.13% of areas. Of these, 22.52% suffered drought, but positive human activity offset the damage in part. 3) Results of this research suggest that appropriate human activity can maximize the benefits of ecological restoration programs and minimize the effects of extreme weather. We therefore recommend incorporating eco-risk assessment and scientific management mechanisms in the design and management of ecosystem restoration programs.展开更多
For the gray attributes of the equipment program and its difficulty to carry out the quantitative assessment of the equipment program information, the gray relation projection method is simply reviewed. Combining the ...For the gray attributes of the equipment program and its difficulty to carry out the quantitative assessment of the equipment program information, the gray relation projection method is simply reviewed. Combining the super-data envelopment analysis（DEA） model and the gray system theory, a new super-DEA for measuring the weight is proposed, and a gray relation projection model is established to rank the equipment programs. Finally, this approach is used to evaluate the equipment program. The results are verified valid and can provide a new way for evaluating the equipment program.展开更多
Intuitionistic Fuzzy Set (IFS) can be used as a general tool for modeling problems of decision making under uncertainty where, the degree of rejection is defined simultaneously with the degree of acceptance of a piece...Intuitionistic Fuzzy Set (IFS) can be used as a general tool for modeling problems of decision making under uncertainty where, the degree of rejection is defined simultaneously with the degree of acceptance of a piece of information in such a way that these degrees are not complement to each other. Accordingly, an attempt is made to solve intuitionistic fuzzy linear programming problems using a technique based on an earlier technique proposed by Zimmermann to solve fuzzy linear programming problem. Our proposed technique does not require the existing ranking of intuitionistic fuzzy numbers. This method is also different from the existing weight assignment method or the Angelov’s method. A comparative study is undertaken and interesting results have been presented.展开更多
In order to make most software engineers and managers pay more attention to software quality at source level, two confusing terms-coding standard and programming style-were reviewed and compared. An evolutionary model...In order to make most software engineers and managers pay more attention to software quality at source level, two confusing terms-coding standard and programming style-were reviewed and compared. An evolutionary model of quality assurance at source code level was proposed, which implies that coding standard should be better accepted and more emphasized than programming style. Our current researches on evaluating the compliance with coding standards will likely make the strategy of quality assurance at source code level more operable.展开更多
蓄热电采暖因其用电时段可调、运行经济灵活,已经成为西北地区冬季取暖期重要的灵活性调节资源。合理地规划蓄热电采暖容量可以有效提高风电消纳水平,提升系统的运行经济性。为此,该文提出一种考虑热舒适度弹性和提升风电消纳的蓄热电...蓄热电采暖因其用电时段可调、运行经济灵活,已经成为西北地区冬季取暖期重要的灵活性调节资源。合理地规划蓄热电采暖容量可以有效提高风电消纳水平,提升系统的运行经济性。为此,该文提出一种考虑热舒适度弹性和提升风电消纳的蓄热电采暖双层优化配置方法。通过引入热感觉平均标度预测(predicted mean vote,PMV)指标来量化用户的热舒适度,根据热舒适度弹性的限定范围确立热平衡区间约束。在分别分析系统风电消纳以及热舒适度弹性对蓄热电采暖容量配置的影响的基础上,建立兼顾风电消纳和热舒适度弹性的蓄热电采暖双层优化配置模型。上层以风电供热系统年化总成本最小为目标,下层以系统典型日运行成本最小为目标,通过上下层迭代求解蓄热电采暖最优容量配置以及系统运行方案。最后,基于实际算例验证了所提的蓄热电采暖配置方法可在保证供暖舒适度的基础上提升风电消纳水平和系统整体经济性。展开更多
采用先进的Golang网络编程语言,设计和实现了一种新的RUDP(reliable user datagram protocol)传输协议,部署在实际的远距离Internet网络中,对新RUDP协议进行实验验证和性能测试分析。实验结果表明:新RUDP传输协议是可行的,实现了确认、...采用先进的Golang网络编程语言,设计和实现了一种新的RUDP(reliable user datagram protocol)传输协议,部署在实际的远距离Internet网络中,对新RUDP协议进行实验验证和性能测试分析。实验结果表明:新RUDP传输协议是可行的,实现了确认、序列号、重传、拥塞控制、滑动窗口、差错检测等可靠通信机制,保证了传输数据的可靠交付;在相同的实验条件下,新RUDP的丢包率与TCP(transmission control protocol)的相同为0%;新RUDP的端到端时延和时延抖动总体上都比TCP的要小,在一些常见的通信链路中,新RUDP的端到端时延、时延抖动与TCP的之间存在显著性差异,新RUDP的带宽占有率比UDP(user datagram protocol)的显著性低;从实测结果来看,新RUDP比TCP、UDP更适合应用于这类低时延高可靠性的网络新应用。最后,对新RUDP的协议参数进行了部分优化,为这类网络新应用提供性能更好的传输服务质量。展开更多
基金Supported by Social Development Program of Lianyungang Bureau of Science and Technology,Jiangsu Province:RS-based Research on the Eco-environment Evolution of Coastal Regions in Lianyungang(SH0811)~~
文摘Interpretation results of RS images were taken as the foundation, ETM RS images of July 15, 2009 as the data source, ENVI was applied for the preprocessing, Arc GIS used to finish the interpretation, master data obtained, and VB used to complete program development. 12 representative landscape pattern indexes were selected, Excel data used to create Access database, and VB used to complete the program development. Selection of landscape pattern indexes, program development process and program usage were summarized, through comparing its results with Excel calculation results, it was found that calculation results of this program were correct, the usage was convenient, so needs of most users could be satisfied.
基金Under the auspices of the National Key R&D Program of China(No.2017YFC0504701)Science and Technology Service Network Initiative Project of Chinese Academy of Sciences(No.KFJ-STS-ZDTP-036)+1 种基金Fundamental Research Funds for the Central Universities(No.GK201703053)China Postdoctoral Science Foundation(No.2017M623114)
文摘The Chinese government adopted six ecological restoration programs to improve its natural environments. Although these programs have proven successful in improving local environments, some studies have questioned their performance when regions suffer from drought. Whether we should consider the effects of drought on vegetation change in assessments of the benefits of ecological restoration programs is unclear. Therefore, taking the Grain for Green Program(GGP) region as a study area, we estimated vegetation growth in the region from 2000–2010 to clarify the trends in vegetation and their driving forces. Results showed that: 1) vegetation growth increased in the GGP region during 2000–2010, with 59.4% of the area showing an increase in the Normalized Difference Vegetation Index(NDVI). This confirmed the benefits of the ecological restoration program. 2) Drought can affect the vegetation change trend, but human activity plays a significant role in altering vegetation growth, and the slight downward trend in the NDVI was not consistent with the severity of the drought. Positive human activity led to increased NDVI in 89.13% of areas. Of these, 22.52% suffered drought, but positive human activity offset the damage in part. 3) Results of this research suggest that appropriate human activity can maximize the benefits of ecological restoration programs and minimize the effects of extreme weather. We therefore recommend incorporating eco-risk assessment and scientific management mechanisms in the design and management of ecosystem restoration programs.
基金supported by the National Natural Science Foundation of China(7107307971222106+2 种基金70901069)the Research Foundation of the National Excellent Doctoral Dissertation of Chinathe Research Fund for the Doctoral Program of Higher Education(20133402110028)
文摘For the gray attributes of the equipment program and its difficulty to carry out the quantitative assessment of the equipment program information, the gray relation projection method is simply reviewed. Combining the super-data envelopment analysis（DEA） model and the gray system theory, a new super-DEA for measuring the weight is proposed, and a gray relation projection model is established to rank the equipment programs. Finally, this approach is used to evaluate the equipment program. The results are verified valid and can provide a new way for evaluating the equipment program.
文摘Intuitionistic Fuzzy Set (IFS) can be used as a general tool for modeling problems of decision making under uncertainty where, the degree of rejection is defined simultaneously with the degree of acceptance of a piece of information in such a way that these degrees are not complement to each other. Accordingly, an attempt is made to solve intuitionistic fuzzy linear programming problems using a technique based on an earlier technique proposed by Zimmermann to solve fuzzy linear programming problem. Our proposed technique does not require the existing ranking of intuitionistic fuzzy numbers. This method is also different from the existing weight assignment method or the Angelov’s method. A comparative study is undertaken and interesting results have been presented.
文摘In order to make most software engineers and managers pay more attention to software quality at source level, two confusing terms-coding standard and programming style-were reviewed and compared. An evolutionary model of quality assurance at source code level was proposed, which implies that coding standard should be better accepted and more emphasized than programming style. Our current researches on evaluating the compliance with coding standards will likely make the strategy of quality assurance at source code level more operable.
文摘蓄热电采暖因其用电时段可调、运行经济灵活,已经成为西北地区冬季取暖期重要的灵活性调节资源。合理地规划蓄热电采暖容量可以有效提高风电消纳水平,提升系统的运行经济性。为此,该文提出一种考虑热舒适度弹性和提升风电消纳的蓄热电采暖双层优化配置方法。通过引入热感觉平均标度预测(predicted mean vote,PMV)指标来量化用户的热舒适度,根据热舒适度弹性的限定范围确立热平衡区间约束。在分别分析系统风电消纳以及热舒适度弹性对蓄热电采暖容量配置的影响的基础上,建立兼顾风电消纳和热舒适度弹性的蓄热电采暖双层优化配置模型。上层以风电供热系统年化总成本最小为目标,下层以系统典型日运行成本最小为目标,通过上下层迭代求解蓄热电采暖最优容量配置以及系统运行方案。最后,基于实际算例验证了所提的蓄热电采暖配置方法可在保证供暖舒适度的基础上提升风电消纳水平和系统整体经济性。
文摘采用先进的Golang网络编程语言,设计和实现了一种新的RUDP(reliable user datagram protocol)传输协议,部署在实际的远距离Internet网络中,对新RUDP协议进行实验验证和性能测试分析。实验结果表明:新RUDP传输协议是可行的,实现了确认、序列号、重传、拥塞控制、滑动窗口、差错检测等可靠通信机制,保证了传输数据的可靠交付;在相同的实验条件下,新RUDP的丢包率与TCP(transmission control protocol)的相同为0%;新RUDP的端到端时延和时延抖动总体上都比TCP的要小,在一些常见的通信链路中,新RUDP的端到端时延、时延抖动与TCP的之间存在显著性差异,新RUDP的带宽占有率比UDP(user datagram protocol)的显著性低;从实测结果来看,新RUDP比TCP、UDP更适合应用于这类低时延高可靠性的网络新应用。最后,对新RUDP的协议参数进行了部分优化,为这类网络新应用提供性能更好的传输服务质量。
