In this article, a model of a weed control threshold forecast system has been established, with related model solving, data checking, database setting up, and system engineering illustration. Moreover, it is tested by...In this article, a model of a weed control threshold forecast system has been established, with related model solving, data checking, database setting up, and system engineering illustration. Moreover, it is tested by a software with data from a sugar cane planting experimental field in Yunnan, China. The methodology behind the detailed system analysis, design, and engineering has been discussed. The issue of how to create a dynamic data-dependent forecast model of a threshold forecast system, whose threshold changes according to the change of planting environment has been solved. Hence an effective solution has been initiated for further development on an agricultural expert system.展开更多
This study deals with the dynamic property of threshold cryptosystem. A dynamic threshold cryptosystem allows the sender to choose the authorized decryption group and the threshold value for each message dynamically. ...This study deals with the dynamic property of threshold cryptosystem. A dynamic threshold cryptosystem allows the sender to choose the authorized decryption group and the threshold value for each message dynamically. We first introduce an identity based dynamic threshold cryptosystem, and then use the CanettiHalevi-Katz(CHK) transformation to transform it into a fully secure system in the traditional public key setting.Finally, the elegant dual system encryption technique is applied to constructing a fully secure dynamic threshold cryptosystem with adaptive security.展开更多
A method for reliability analysis of the competing failure with the probabilistic failure threshold value not the fixed threshold value is presented, which involves the random shocks and the degradation is independent...A method for reliability analysis of the competing failure with the probabilistic failure threshold value not the fixed threshold value is presented, which involves the random shocks and the degradation is independent and dependent respectively. Specifically, for the dependent condition, the effect due to the random shocks on the degradation is considered with a damage factor. In addition, the dependent competing failure model is applied to the reliability analysis of the k-out-of-n systems. Finally, two studied cases are presented to illustrate the proposed method, and the results show the proposed method is reasonable.展开更多
In the present work, we investigate threshold characteristics of a single mode 1.55 μm InGaAsP vertical cavity surface emitting laser (VCSEL) with two different optical confinement structures. The device employs InGa...In the present work, we investigate threshold characteristics of a single mode 1.55 μm InGaAsP vertical cavity surface emitting laser (VCSEL) with two different optical confinement structures. The device employs InGaAsP active region, which is sandwiched between GaAs/AlGaAs and GaAs/AlAs distributed Bragg reflectors (DBRs). The optical confinement introduced by the oxide aperture or a single defect photonic crystal design with holes etched throughout the whole structure, is compared with previous work. Photonic crystal VCSEL shows 30.86% and 57.02% lower threshold current than that of the similar oxide confined VCSEL and previous results, respectively. This paper provides key results of the threshold characteristics, including the threshold current and the threshold power. Results suggest that, the 1.55 μm InGaAsP photonic crystal VCSEL seems to be the most optimal one for light sources in high performance optical communication systems.展开更多
2025年5月,美国血液和生物治疗促进协会(the Association for the Advancement of Blood and Biotherapies,AABB)与国际输血医学指南协作组(the International Collaboration for Transfusion Medicine Guidelines,ICTMG)联合发布新版...2025年5月,美国血液和生物治疗促进协会(the Association for the Advancement of Blood and Biotherapies,AABB)与国际输血医学指南协作组(the International Collaboration for Transfusion Medicine Guidelines,ICTMG)联合发布新版《血小板输注指南》。该指南基于21项随机对照试验(RCT)和13项高质量观察性研究,采用推荐分级的评价、制定与评估系统(the Grading of Recommendations Assessment Development and Evaluation,GRADE)进行证据分析,将“限制性血小板输注策略”确立为核心,旨在推动全球血小板输注实践的规范化与同质化。指南适用范围广泛,涵盖成人、儿童、新生儿等不同群体,包括血液系统疾病患者、干细胞移植患者、围手术期患者、登革热患者及接受有创操作的患者等。指南设置了死亡率(2%)、2~4级出血(20%)、3~4级出血(5%)三类关键结局的最小重要差异(MIDs)阈值,用于证据确定性分级。在重要推荐方面,明确了高度/中度可信的强烈推荐(如化疗或异体干细胞移植的非出血性血小板减少症患者血小板计数<10×10^(9)/L时输注、无严重出血的新生儿消耗性血小板减少症患者计数<25×10^(9)/L时输注、登革热无大出血患者不输注等)及低度/极低度可信的有条件推荐(如自体干细胞移植成人患者有条件不推荐预防性输注、中心静脉置管成人患者计数<10×10^(9)/L时条件性输注等),同时阐述了过敏反应、发热反应、输血相关急性肺损伤(TRALI)等常见血小板输血反应及其风险。该指南通过降低输注阈值、细化风险分层,可减少不必要输注及相关不良反应,缓解血小板资源短缺;未来需进一步补充体外循环、放射介入等领域的循证证据,并探索体外诱导分化血小板、通用工程血小板等技术以优化输血实践。展开更多
文摘In this article, a model of a weed control threshold forecast system has been established, with related model solving, data checking, database setting up, and system engineering illustration. Moreover, it is tested by a software with data from a sugar cane planting experimental field in Yunnan, China. The methodology behind the detailed system analysis, design, and engineering has been discussed. The issue of how to create a dynamic data-dependent forecast model of a threshold forecast system, whose threshold changes according to the change of planting environment has been solved. Hence an effective solution has been initiated for further development on an agricultural expert system.
基金the National Natural Science Foundation of China(Nos.61202023,60903189 and 61133014)
文摘This study deals with the dynamic property of threshold cryptosystem. A dynamic threshold cryptosystem allows the sender to choose the authorized decryption group and the threshold value for each message dynamically. We first introduce an identity based dynamic threshold cryptosystem, and then use the CanettiHalevi-Katz(CHK) transformation to transform it into a fully secure system in the traditional public key setting.Finally, the elegant dual system encryption technique is applied to constructing a fully secure dynamic threshold cryptosystem with adaptive security.
基金the Special Research Fund for the National Natural Science Foundation of China(No.11272082)the Fundamental Research Funds for the Central Universities(No.E022050205)the Open Research Fund of Key Laboratory of Fluid and Power Machinery of Xihua University(No.szjj2013-03)
文摘A method for reliability analysis of the competing failure with the probabilistic failure threshold value not the fixed threshold value is presented, which involves the random shocks and the degradation is independent and dependent respectively. Specifically, for the dependent condition, the effect due to the random shocks on the degradation is considered with a damage factor. In addition, the dependent competing failure model is applied to the reliability analysis of the k-out-of-n systems. Finally, two studied cases are presented to illustrate the proposed method, and the results show the proposed method is reasonable.
文摘In the present work, we investigate threshold characteristics of a single mode 1.55 μm InGaAsP vertical cavity surface emitting laser (VCSEL) with two different optical confinement structures. The device employs InGaAsP active region, which is sandwiched between GaAs/AlGaAs and GaAs/AlAs distributed Bragg reflectors (DBRs). The optical confinement introduced by the oxide aperture or a single defect photonic crystal design with holes etched throughout the whole structure, is compared with previous work. Photonic crystal VCSEL shows 30.86% and 57.02% lower threshold current than that of the similar oxide confined VCSEL and previous results, respectively. This paper provides key results of the threshold characteristics, including the threshold current and the threshold power. Results suggest that, the 1.55 μm InGaAsP photonic crystal VCSEL seems to be the most optimal one for light sources in high performance optical communication systems.
文摘2025年5月,美国血液和生物治疗促进协会(the Association for the Advancement of Blood and Biotherapies,AABB)与国际输血医学指南协作组(the International Collaboration for Transfusion Medicine Guidelines,ICTMG)联合发布新版《血小板输注指南》。该指南基于21项随机对照试验(RCT)和13项高质量观察性研究,采用推荐分级的评价、制定与评估系统(the Grading of Recommendations Assessment Development and Evaluation,GRADE)进行证据分析,将“限制性血小板输注策略”确立为核心,旨在推动全球血小板输注实践的规范化与同质化。指南适用范围广泛,涵盖成人、儿童、新生儿等不同群体,包括血液系统疾病患者、干细胞移植患者、围手术期患者、登革热患者及接受有创操作的患者等。指南设置了死亡率(2%)、2~4级出血(20%)、3~4级出血(5%)三类关键结局的最小重要差异(MIDs)阈值,用于证据确定性分级。在重要推荐方面,明确了高度/中度可信的强烈推荐(如化疗或异体干细胞移植的非出血性血小板减少症患者血小板计数<10×10^(9)/L时输注、无严重出血的新生儿消耗性血小板减少症患者计数<25×10^(9)/L时输注、登革热无大出血患者不输注等)及低度/极低度可信的有条件推荐(如自体干细胞移植成人患者有条件不推荐预防性输注、中心静脉置管成人患者计数<10×10^(9)/L时条件性输注等),同时阐述了过敏反应、发热反应、输血相关急性肺损伤(TRALI)等常见血小板输血反应及其风险。该指南通过降低输注阈值、细化风险分层,可减少不必要输注及相关不良反应,缓解血小板资源短缺;未来需进一步补充体外循环、放射介入等领域的循证证据,并探索体外诱导分化血小板、通用工程血小板等技术以优化输血实践。
