Green composites made from bamboo fibers and biodegradable resins were fabricated with press molding.On the basis of the Weibull distribution and the weakest-link theory,the statistical strength and distribution of ba...Green composites made from bamboo fibers and biodegradable resins were fabricated with press molding.On the basis of the Weibull distribution and the weakest-link theory,the statistical strength and distribution of bamboo fiber were analyzed,and the tensile strength of green composites was also investigated.The result confirms that the tensile statistical strength of fiber fits well with two-parameter Weibull distribution.In addition,the tensile strength of bamboo fiber reinforced composites is about 330 MPa with the fiber volume fraction of 70%.This value is close to or higher than that of other natural fiber reinforced green composites.展开更多
In order to improve fiber quality of green cotton,a wide hybrid was used between a green fiber cotton and Sea Island cotton.The results show that the hybrid F1 plants were stable,but F2
The high-density population leads to crowded cities. The future city is envisaged to encompass a large-scale network with diverse applications and a massive number of interconnected heterogeneous wireless-enabled devi...The high-density population leads to crowded cities. The future city is envisaged to encompass a large-scale network with diverse applications and a massive number of interconnected heterogeneous wireless-enabled devices. Hence, green technology elements are crucial to design sustainable and future-proof network architectures. They are the solutions for spectrum scarcity, high latency, interference, energy efficiency, and scalability that occur in dense and heterogeneous wireless networks especially in the home area network （HAN）. Radio-over-fiber （ROF） is a technology candidate to provide a global view of HAN＇s activities that can be leveraged to allocate orthogonal channel communications for enabling wireless-enabled HAN devices transmission, with considering the clustered-frequency-reuse approach. Our proposed network architecture design is mainly focused on enhancing the network throughput and reducing the average network communications latency by proposing a data aggregation unit （DAU）. The performance shows that with the DAU, the average network communications latency reduces significantly while the network throughput is enhanced, compared with the existing ROF architecture without the DAU.展开更多
为建立鸽I型腺病毒(PIAdV-I)的快速检测方法,本研究根据PIAdV-I Fiber 2基因的保守区域设计特异性引物,通过优化反应条件,建立了快速检测PIAdV-I的SYBR Green I荧光定量PCR(qPCR)方法。建立的SYBR Green I qPCR方法的标准曲线结果显示,...为建立鸽I型腺病毒(PIAdV-I)的快速检测方法,本研究根据PIAdV-I Fiber 2基因的保守区域设计特异性引物,通过优化反应条件,建立了快速检测PIAdV-I的SYBR Green I荧光定量PCR(qPCR)方法。建立的SYBR Green I qPCR方法的标准曲线结果显示,重组质粒标准品pMD19-Fiber在1×10^(3)拷贝/μL^(1)×10^(8)拷贝/μL时和Ct值之间的线性关系良好,相关系数R~2=0.995,扩增效率为90%。利用建立的qPCR方法对鸽II型腺病毒(PIAdV-II)Fiber 2基因保守区质粒标准品、鸽圆环病毒(PICV)、新城疫病毒(NDV)、多杀性巴氏杆菌(PM)和禽致病性大肠杆菌(APEC)的检测结果均为阴性,仅PIAdV-I检测为阳性,特异性强;该方法对浓度为1×10^(0)拷贝/μL^(1)×10^(8)拷贝/μL的重组质粒标准品进行检测,结果显示最低检测限为1×10^(2)拷贝/μL,而普通PCR最低检测限为1×10^(4)拷贝/μL,表明qPCR方法的敏感性更强;该方法批内、批间重复性试验的变异系数分别小于1%和2%,重复性好。利用建立的qPCR方法和普通PCR方法对从呼和浩特市某赛鸽公棚随机采集的30份鸽肝脏样品进行PIAdV-I检测,结果显示前者的阳性检测率为63.3%(19/30),普通PCR方法的阳性率为36.7%(11/30),两种方法的阳性符合率均为100%。本研究首次建立PIAdV-I的q PCR检测方法,为鸽PIAdV-I的感染提供了敏感、快速的检测手段。展开更多
基金Project(2007BAQ0104901) supported by the 11th Five-Year-Plan National Scientific & Technological ProgramProject(200704020) supported by the National Special Program on the Public Welfare Forests supported by Ministry of Science and Technology of China
文摘Green composites made from bamboo fibers and biodegradable resins were fabricated with press molding.On the basis of the Weibull distribution and the weakest-link theory,the statistical strength and distribution of bamboo fiber were analyzed,and the tensile strength of green composites was also investigated.The result confirms that the tensile statistical strength of fiber fits well with two-parameter Weibull distribution.In addition,the tensile strength of bamboo fiber reinforced composites is about 330 MPa with the fiber volume fraction of 70%.This value is close to or higher than that of other natural fiber reinforced green composites.
文摘In order to improve fiber quality of green cotton,a wide hybrid was used between a green fiber cotton and Sea Island cotton.The results show that the hybrid F1 plants were stable,but F2
基金supported by the Ministry of Higher Education,Malaysia under Scholarship of Hadiah Latihan Persekutuan under Grant No.KPT.B.600-19/3-791206065445
文摘The high-density population leads to crowded cities. The future city is envisaged to encompass a large-scale network with diverse applications and a massive number of interconnected heterogeneous wireless-enabled devices. Hence, green technology elements are crucial to design sustainable and future-proof network architectures. They are the solutions for spectrum scarcity, high latency, interference, energy efficiency, and scalability that occur in dense and heterogeneous wireless networks especially in the home area network （HAN）. Radio-over-fiber （ROF） is a technology candidate to provide a global view of HAN＇s activities that can be leveraged to allocate orthogonal channel communications for enabling wireless-enabled HAN devices transmission, with considering the clustered-frequency-reuse approach. Our proposed network architecture design is mainly focused on enhancing the network throughput and reducing the average network communications latency by proposing a data aggregation unit （DAU）. The performance shows that with the DAU, the average network communications latency reduces significantly while the network throughput is enhanced, compared with the existing ROF architecture without the DAU.
文摘为建立鸽I型腺病毒(PIAdV-I)的快速检测方法,本研究根据PIAdV-I Fiber 2基因的保守区域设计特异性引物,通过优化反应条件,建立了快速检测PIAdV-I的SYBR Green I荧光定量PCR(qPCR)方法。建立的SYBR Green I qPCR方法的标准曲线结果显示,重组质粒标准品pMD19-Fiber在1×10^(3)拷贝/μL^(1)×10^(8)拷贝/μL时和Ct值之间的线性关系良好,相关系数R~2=0.995,扩增效率为90%。利用建立的qPCR方法对鸽II型腺病毒(PIAdV-II)Fiber 2基因保守区质粒标准品、鸽圆环病毒(PICV)、新城疫病毒(NDV)、多杀性巴氏杆菌(PM)和禽致病性大肠杆菌(APEC)的检测结果均为阴性,仅PIAdV-I检测为阳性,特异性强;该方法对浓度为1×10^(0)拷贝/μL^(1)×10^(8)拷贝/μL的重组质粒标准品进行检测,结果显示最低检测限为1×10^(2)拷贝/μL,而普通PCR最低检测限为1×10^(4)拷贝/μL,表明qPCR方法的敏感性更强;该方法批内、批间重复性试验的变异系数分别小于1%和2%,重复性好。利用建立的qPCR方法和普通PCR方法对从呼和浩特市某赛鸽公棚随机采集的30份鸽肝脏样品进行PIAdV-I检测,结果显示前者的阳性检测率为63.3%(19/30),普通PCR方法的阳性率为36.7%(11/30),两种方法的阳性符合率均为100%。本研究首次建立PIAdV-I的q PCR检测方法,为鸽PIAdV-I的感染提供了敏感、快速的检测手段。
