Based on a 2-D hydrodynamic model, a vertically integrated eutrophication model was developed. The physical sub-model can be used for calculation of water density at different depths, and the water quality sub-model w...Based on a 2-D hydrodynamic model, a vertically integrated eutrophication model was developed. The physical sub-model can be used for calculation of water density at different depths, and the water quality sub-model was used for calculation of algal growth. The cohesive and non-cohesive sediments were simulated separately with different methods. The light extinction coefficient used in the underwater light regime sub-model was linearly related to the sum of sediment and phytoplankton biomass. Some components less important to the model were simplified to improve practicability and calculation efficiency. Using field data from Fuchunjiang Reservoir, we calculated the sensitivity of ecological parameters included in this model and validated the model. The results of sensitivity analysis showed that the parameters strongly influenced the phytoplankton biomass, including phytoplankton maximum growth rate, respiration rate, non-predatory mortality rate, settling rate, zooplankton maximum filtration rate, specific extinction coefficient for suspended solids and sediment oxygen demand rate. The model was calibrated by adjusting these parameters. Total chlorophyll α （chl-α） concentrations at different layers in the water column were reproduced very well by the model simulations. The simulated chl-α values were positively correlated to the measured values with Pearson correlation coefficient of 0.92. The mean difference between measured and simulated chl-α concentrations was 12% of the measured chl-α concentration. Measured and simulated DO concentrations were also positively correlated （r = 0.74） and the mean difference was 4% of measured DO concentrations. The successful validation of model indicated that it would be very useful in water quality management and algal bloom prediction in Fuchunjiang Reservoir and a good tool for water quality regulation of other fiver-style reservoirs.展开更多
Varieties of trusted computing products usually follow the mechanism of liner-style chain of trust according to the specifications of TCG.The distinct advantage is that the compatibility with the existing computing pl...Varieties of trusted computing products usually follow the mechanism of liner-style chain of trust according to the specifications of TCG.The distinct advantage is that the compatibility with the existing computing platform is preferable,while the shortcomings are obvious simultaneously.A new star-style trust model with the ability of data recovery is proposed in this paper.The model can enhance the hardware-based root of trust in platform measurement,reduce the loss of trust during transfer process,extend the border of trust flexibly,and have the ability of data backup and recovery.The security and reliability of system is much more improved.It is proved that the star-style trust model is much better than the liner-style trust model in trust transfer and boundary extending etc.using formal methods in this paper.We illuminate the design and implementation of a kind of trusted PDA acting on star-style trust model.展开更多
探讨基于“三全育人”教育理念的护理本科生SEED数字化学风建设,即以学风(style of study)建设为核心,教育(education)为驱动,在线学习(e-learning)为衔接,数字化(digitization)手段为支撑。通过数字化技术整合教育资源,优化学生的学习...探讨基于“三全育人”教育理念的护理本科生SEED数字化学风建设,即以学风(style of study)建设为核心,教育(education)为驱动,在线学习(e-learning)为衔接,数字化(digitization)手段为支撑。通过数字化技术整合教育资源,优化学生的学习行为,推动全员参与、全过程管理和全方位覆盖的学风建设模式,以提升护理本科生的学习投入度和信息素养为主要目标,为护理教育提供新的实践路径。展开更多
基金supported by the National Natural Sci-ence Foundation of China (No. 40730529, 40501078)the Chinese Academy of Sciences (No. KZCX2-YW-419)the Department of Science and Technology of Zhejiang Province (No. 2005C13001)
文摘Based on a 2-D hydrodynamic model, a vertically integrated eutrophication model was developed. The physical sub-model can be used for calculation of water density at different depths, and the water quality sub-model was used for calculation of algal growth. The cohesive and non-cohesive sediments were simulated separately with different methods. The light extinction coefficient used in the underwater light regime sub-model was linearly related to the sum of sediment and phytoplankton biomass. Some components less important to the model were simplified to improve practicability and calculation efficiency. Using field data from Fuchunjiang Reservoir, we calculated the sensitivity of ecological parameters included in this model and validated the model. The results of sensitivity analysis showed that the parameters strongly influenced the phytoplankton biomass, including phytoplankton maximum growth rate, respiration rate, non-predatory mortality rate, settling rate, zooplankton maximum filtration rate, specific extinction coefficient for suspended solids and sediment oxygen demand rate. The model was calibrated by adjusting these parameters. Total chlorophyll α （chl-α） concentrations at different layers in the water column were reproduced very well by the model simulations. The simulated chl-α values were positively correlated to the measured values with Pearson correlation coefficient of 0.92. The mean difference between measured and simulated chl-α concentrations was 12% of the measured chl-α concentration. Measured and simulated DO concentrations were also positively correlated （r = 0.74） and the mean difference was 4% of measured DO concentrations. The successful validation of model indicated that it would be very useful in water quality management and algal bloom prediction in Fuchunjiang Reservoir and a good tool for water quality regulation of other fiver-style reservoirs.
基金Supported by the National Natural Science Foundation of China(61303024)the Natural Science Foundation of Hubei Province(2013CFB441)+1 种基金the Foundation of Science and Technology on Information Assurance Laboratory(KJ-13-106)the Natural Science Foundation of Jiangsu Province(BK20130372)
文摘Varieties of trusted computing products usually follow the mechanism of liner-style chain of trust according to the specifications of TCG.The distinct advantage is that the compatibility with the existing computing platform is preferable,while the shortcomings are obvious simultaneously.A new star-style trust model with the ability of data recovery is proposed in this paper.The model can enhance the hardware-based root of trust in platform measurement,reduce the loss of trust during transfer process,extend the border of trust flexibly,and have the ability of data backup and recovery.The security and reliability of system is much more improved.It is proved that the star-style trust model is much better than the liner-style trust model in trust transfer and boundary extending etc.using formal methods in this paper.We illuminate the design and implementation of a kind of trusted PDA acting on star-style trust model.
文摘探讨基于“三全育人”教育理念的护理本科生SEED数字化学风建设,即以学风(style of study)建设为核心,教育(education)为驱动,在线学习(e-learning)为衔接,数字化(digitization)手段为支撑。通过数字化技术整合教育资源,优化学生的学习行为,推动全员参与、全过程管理和全方位覆盖的学风建设模式,以提升护理本科生的学习投入度和信息素养为主要目标,为护理教育提供新的实践路径。
