How to mine valuable information from massive multisource heterogeneous data and identify the intention of aerial targets is a major research focus at present. Aiming at the longterm dependence of air target intention...How to mine valuable information from massive multisource heterogeneous data and identify the intention of aerial targets is a major research focus at present. Aiming at the longterm dependence of air target intention recognition, this paper deeply explores the potential attribute features from the spatiotemporal sequence data of the target. First, we build an intelligent dynamic intention recognition framework, including a series of specific processes such as data source, data preprocessing,target space-time, convolutional neural networks-bidirectional gated recurrent unit-atteneion (CBA) model and intention recognition. Then, we analyze and reason the designed CBA model in detail. Finally, through comparison and analysis with other recognition model experiments, our proposed method can effectively improve the accuracy of air target intention recognition,and is of significance to the commanders’ operational command and situation prediction.展开更多
利用区块链和联邦学习等技术,构建基于区块链的中医消化领域临床科研一体化数据共享平台,包括中医消化领域优势病种数据管理系统、中医消化领域优势病种可信联合循证分析联盟链和中医消化领域优势病种可信联合循证分析平台。该方案支持...利用区块链和联邦学习等技术,构建基于区块链的中医消化领域临床科研一体化数据共享平台,包括中医消化领域优势病种数据管理系统、中医消化领域优势病种可信联合循证分析联盟链和中医消化领域优势病种可信联合循证分析平台。该方案支持多途径数据采集,包括医院信息管理系统(Hospital Information System, HIS)/医学实验室信息管理系统(Laboratory Information Management System, LIS)/电子病历(Electronic Medical Record, EMR)等业务系统中临床数据定时抽取和手动导入,科研数据经病例报告表(Case Report Form, CRF)手动录入和自动映射等方式;并支持原始数据本地存储,仅将数据索引和数据Hash特征进行共识上链存证;基于RegLang智能合约监管,实现监管规则的数字化、自动化和智能化,保证智能合约的安全性,实现数据安全共享的函数级控制;借助分布式算法实现各节点本地单独计算、汇总结果链上流转等功能,做到“算法多跑路,数据不跑路”,充分保障数据安全与隐私。整个平台架构在数据安全存储和可信计算之上实现了多中心医学研究全场景的解决方案,拥有面向多样化医疗科研场景所需的上层应用能力,如多中心临床研究开展、跨区域专病数据库建设等。临床科研一体化数据共享平台的建立,对促进中医药临床与科研数据多方平等共享、合作共赢提供了有力支撑,为中医药行业快速发展奠定了坚实基础。展开更多
Polyurethane coated urea slow/controlled release fertilizer was prepared based on urea granules, isocyanate, polyols and paraffin. Isocyanate reacted with polyols to synthesize the polyurethane skin layer on urea gran...Polyurethane coated urea slow/controlled release fertilizer was prepared based on urea granules, isocyanate, polyols and paraffin. Isocyanate reacted with polyols to synthesize the polyurethane skin layer on urea granules surface. Paraffin serves as a lubricant during syntheses of polyurethane skin layers. The structure and nutrient release characteristics of the polyurethane skin layers were investigated by FTIR, SEM and TG. Urea nitrogen slow-release behavior of the polyurethane coated urea was tested. The experimental results indicated that compact and dense polyurethane skin layers with a thickness of 10-15 lam were formed on urea surface, the urea nitrogen slow-release time can reach 40-50 days. Paraffin proves to play a key role in inhibiting water to penetrate into urea, but excessive addition would decrease the polyurethane crosslinking density.展开更多
Porous silicon samples have been successfully prepared by elect rochemical etching technique,which show intense photoluminescence(PL)in the visible wave-length region.The measurements of the temperature dependence of ...Porous silicon samples have been successfully prepared by elect rochemical etching technique,which show intense photoluminescence(PL)in the visible wave-length region.The measurements of the temperature dependence of PL in porous silicon show that the wavelength of the luminescent peak shifts to the blue and the PL band width does not change as the temperature of the sample increases over a wide range.The intensities of PL are measured as a function of temperature showing the confined exciton recombination behaviour,and the activation energies of 68.6 and 205meV of the excitons have been obtained for the low temperature and high temperature regions,respectively.The results suggest that the PL in porous silicon is due to the radiative recombination in a quantum wire system.展开更多
基金supported by the National Natural Science Foundation of China (61502523)。
文摘How to mine valuable information from massive multisource heterogeneous data and identify the intention of aerial targets is a major research focus at present. Aiming at the longterm dependence of air target intention recognition, this paper deeply explores the potential attribute features from the spatiotemporal sequence data of the target. First, we build an intelligent dynamic intention recognition framework, including a series of specific processes such as data source, data preprocessing,target space-time, convolutional neural networks-bidirectional gated recurrent unit-atteneion (CBA) model and intention recognition. Then, we analyze and reason the designed CBA model in detail. Finally, through comparison and analysis with other recognition model experiments, our proposed method can effectively improve the accuracy of air target intention recognition,and is of significance to the commanders’ operational command and situation prediction.
文摘利用区块链和联邦学习等技术,构建基于区块链的中医消化领域临床科研一体化数据共享平台,包括中医消化领域优势病种数据管理系统、中医消化领域优势病种可信联合循证分析联盟链和中医消化领域优势病种可信联合循证分析平台。该方案支持多途径数据采集,包括医院信息管理系统(Hospital Information System, HIS)/医学实验室信息管理系统(Laboratory Information Management System, LIS)/电子病历(Electronic Medical Record, EMR)等业务系统中临床数据定时抽取和手动导入,科研数据经病例报告表(Case Report Form, CRF)手动录入和自动映射等方式;并支持原始数据本地存储,仅将数据索引和数据Hash特征进行共识上链存证;基于RegLang智能合约监管,实现监管规则的数字化、自动化和智能化,保证智能合约的安全性,实现数据安全共享的函数级控制;借助分布式算法实现各节点本地单独计算、汇总结果链上流转等功能,做到“算法多跑路,数据不跑路”,充分保障数据安全与隐私。整个平台架构在数据安全存储和可信计算之上实现了多中心医学研究全场景的解决方案,拥有面向多样化医疗科研场景所需的上层应用能力,如多中心临床研究开展、跨区域专病数据库建设等。临床科研一体化数据共享平台的建立,对促进中医药临床与科研数据多方平等共享、合作共赢提供了有力支撑,为中医药行业快速发展奠定了坚实基础。
基金the National Key Technology R&D Program of the 11th Five-Year Period (No.2006BAD10B08)
文摘Polyurethane coated urea slow/controlled release fertilizer was prepared based on urea granules, isocyanate, polyols and paraffin. Isocyanate reacted with polyols to synthesize the polyurethane skin layer on urea granules surface. Paraffin serves as a lubricant during syntheses of polyurethane skin layers. The structure and nutrient release characteristics of the polyurethane skin layers were investigated by FTIR, SEM and TG. Urea nitrogen slow-release behavior of the polyurethane coated urea was tested. The experimental results indicated that compact and dense polyurethane skin layers with a thickness of 10-15 lam were formed on urea surface, the urea nitrogen slow-release time can reach 40-50 days. Paraffin proves to play a key role in inhibiting water to penetrate into urea, but excessive addition would decrease the polyurethane crosslinking density.
文摘Porous silicon samples have been successfully prepared by elect rochemical etching technique,which show intense photoluminescence(PL)in the visible wave-length region.The measurements of the temperature dependence of PL in porous silicon show that the wavelength of the luminescent peak shifts to the blue and the PL band width does not change as the temperature of the sample increases over a wide range.The intensities of PL are measured as a function of temperature showing the confined exciton recombination behaviour,and the activation energies of 68.6 and 205meV of the excitons have been obtained for the low temperature and high temperature regions,respectively.The results suggest that the PL in porous silicon is due to the radiative recombination in a quantum wire system.
