ZTE Corporation, a leading global provider of telecommunications equipment and networking, has announced at the GSMA World Mobile Congress Barcelona 2010 that its global GSM sales continued to grow fast in 2009, with ...ZTE Corporation, a leading global provider of telecommunications equipment and networking, has announced at the GSMA World Mobile Congress Barcelona 2010 that its global GSM sales continued to grow fast in 2009, with a shipment of over 750,000 carrier frequencies in the past year. As its share in the global newly added market rose to almost 20%, ZTE is now one of the top 3 equipment vendors in the industry. In 2009, ZTE successfully sold its GSM products to world-class multinational operators such as Telenor, Teliasonera and Cell C, making large-scale advancements in European and emerging markets.展开更多
ZTE Corporation announced on November 12, 2009 that ZTE’s xPON Next Generation Optical Access Platform has recently passed authoritative tests by the Metro Ethernet Forum (MEF) organization, making
ZTE Corporation announced on February 9 that it had received the Best Practice Award for being Frost ＆ Sullivan＇s ＂2010 SDR Equipment Vendor of the Year.＂ This award recognizes ZTE＇s outstanding contribution to t...ZTE Corporation announced on February 9 that it had received the Best Practice Award for being Frost ＆ Sullivan＇s ＂2010 SDR Equipment Vendor of the Year.＂ This award recognizes ZTE＇s outstanding contribution to the development of Software Defined Radio （SDR） technology and the wireless communications industry.展开更多
Developing host materials with high specific surface area, good electron conductivity, and fast ion transportation channel is critical for high performance lithium-selenium(Li-Se) batteries. Herein, a series of three ...Developing host materials with high specific surface area, good electron conductivity, and fast ion transportation channel is critical for high performance lithium-selenium(Li-Se) batteries. Herein, a series of three dimensional ordered hierarchically porous carbon(3D OHPC) materials with micro/meso/macropores are designed and synthesized for Li-Se battery. The porous structure is tuned by following the concept of the generalized Murray’s law to facilitate the mass diffusion and reduce ion transport resistance.The optimized 3D Se/OHPC cathode exhibits a very high 2 nd discharge capacity of 651 m Ah/g and retains 361 m Ah/g after 200 cycles at 0.2 C. Even at a high current rate of 5 C, the battery still shows a discharge capacity as high as 155 m Ah/g. The improved electrochemical performance is attributed to the synergy effect of the interconnected and well-designed micro, meso and macroporosity while shortened ions diffusion pathways of such Murray materials accelerate its ionic and electronic conductivities leading to the enhanced electrochemical reaction. The diffusivity coefficient in Se/OHPC can reach a very high value of 1.3 × 10^(-11)cm^(2)/s, much higher than those in single pore size carbon hosts. Their effective volume expansion accommodation capability and reduced dissolution of polyselenides ensure the high stability of the battery. This work, for the first time, established the clear relationship between textural properties of cathode materials and their performance and demonstrates that the concept of the generalized Murray’s law can be used as efficient guidance for the rational design and synthesis of advanced hierarchically porous materials and the great potential of 3D OHPC materials as a practical high performance cathode material for Li-Se batteries.展开更多
An experiment was conducted to examine probable impact of location and handling on the fungi commonly associated with rotting watermelon (Citrullus lanatus). The rotting watermelon samples were obtained from two vendo...An experiment was conducted to examine probable impact of location and handling on the fungi commonly associated with rotting watermelon (Citrullus lanatus). The rotting watermelon samples were obtained from two vendors each from five different markets (Bodija, Sango, Mokola, Eleyele, Agbowo and Ojoo) in Ibadan, Oyo state. They were placed in different sterile sample bags which were labeled appropriately before bringing them to the Pathology Laboratory, Department of Botany, University of Ibadan. Isolation of fungi from the rotting samples was carried out using pour plate method on acidified Potato Dextrose Agar (APDA). Pathogenicity test was also conducted for the isolated fungi. All experiments were done in duplicates and all plates were incubated at 25°C ± 2°C for 7 days. Pure cultures were obtained and identified and each isolated fungus was recorded as 1 which means present and 0 which means absent. The data obtained were analyzed using SAS version 9.3 at p ≤ 0.05. A total of three fungi were isolated viz., Aspergillus flavus, Saccharomyces cerevisae and Aspergillus niger. Occurrence of A. niger and A. flavus in samples obtained from Bodija, Mokola, Sango and Ojoo markets were significantly (P ≤ 0.05) higher than those from the other two markets. Occurrence of S. cerevisae in samples obtained from Bodija and Mokola markets were significantly (P ≤ 0.05) higher than those from the other three markets. Location had significant impact on the occurrence of isolated fungi in the rotting watermelons. However, handling by vendors had no significant impact on occurrence of the isolated fungi. Vendors and consumers are advised to be mindful of place of purchase and to also maintain good general hygiene before consumption.展开更多
‘Empowerment’is the result of pursuing special capabilities under a specific value orientation.The changes in related object capabilities triggered by scientific and technical information activities in the new envir...‘Empowerment’is the result of pursuing special capabilities under a specific value orientation.The changes in related object capabilities triggered by scientific and technical information activities in the new environment are important to the national scientific and technical(S&T)information governance.Based on the empowerment theories and evaluation practices,this study attempts to construct an empowerment evaluation framework for national S&T information governance and takes the participatory technology assessment and Altmetrics methods as examples to demonstrate its advantages:1)The capability changes and development potential are regarded as important basis for evaluation;2)The multi-person participation and multi-indicator comprehensive evaluation method is conducive to the democratic and objective nature of science and technology information governance policy formulation.展开更多
文摘ZTE Corporation, a leading global provider of telecommunications equipment and networking, has announced at the GSMA World Mobile Congress Barcelona 2010 that its global GSM sales continued to grow fast in 2009, with a shipment of over 750,000 carrier frequencies in the past year. As its share in the global newly added market rose to almost 20%, ZTE is now one of the top 3 equipment vendors in the industry. In 2009, ZTE successfully sold its GSM products to world-class multinational operators such as Telenor, Teliasonera and Cell C, making large-scale advancements in European and emerging markets.
文摘ZTE Corporation announced on November 12, 2009 that ZTE’s xPON Next Generation Optical Access Platform has recently passed authoritative tests by the Metro Ethernet Forum (MEF) organization, making
文摘ZTE Corporation announced on February 9 that it had received the Best Practice Award for being Frost ＆ Sullivan＇s ＂2010 SDR Equipment Vendor of the Year.＂ This award recognizes ZTE＇s outstanding contribution to the development of Software Defined Radio （SDR） technology and the wireless communications industry.
基金financial support from the China Scholarship Council (CSC) and a scholarship from the Laboratory of Inorganic Materials Chemistry,Universitéde Namur,Belgiumfinancially supported by the National Postdoctoral Program (Grant No. 2020M672782)+2 种基金the National Natural Science Foundation of China (Grant No. U1663225)the the Program of Introducing Talents of Discipline to Universities-National 111 Project from the Ministry of Science and Technology and the Ministry of Education of China (Grant No. B20002)the National Key R&D Program of China (Grant No. 2016YFA0202602)。
文摘Developing host materials with high specific surface area, good electron conductivity, and fast ion transportation channel is critical for high performance lithium-selenium(Li-Se) batteries. Herein, a series of three dimensional ordered hierarchically porous carbon(3D OHPC) materials with micro/meso/macropores are designed and synthesized for Li-Se battery. The porous structure is tuned by following the concept of the generalized Murray’s law to facilitate the mass diffusion and reduce ion transport resistance.The optimized 3D Se/OHPC cathode exhibits a very high 2 nd discharge capacity of 651 m Ah/g and retains 361 m Ah/g after 200 cycles at 0.2 C. Even at a high current rate of 5 C, the battery still shows a discharge capacity as high as 155 m Ah/g. The improved electrochemical performance is attributed to the synergy effect of the interconnected and well-designed micro, meso and macroporosity while shortened ions diffusion pathways of such Murray materials accelerate its ionic and electronic conductivities leading to the enhanced electrochemical reaction. The diffusivity coefficient in Se/OHPC can reach a very high value of 1.3 × 10^(-11)cm^(2)/s, much higher than those in single pore size carbon hosts. Their effective volume expansion accommodation capability and reduced dissolution of polyselenides ensure the high stability of the battery. This work, for the first time, established the clear relationship between textural properties of cathode materials and their performance and demonstrates that the concept of the generalized Murray’s law can be used as efficient guidance for the rational design and synthesis of advanced hierarchically porous materials and the great potential of 3D OHPC materials as a practical high performance cathode material for Li-Se batteries.
文摘An experiment was conducted to examine probable impact of location and handling on the fungi commonly associated with rotting watermelon (Citrullus lanatus). The rotting watermelon samples were obtained from two vendors each from five different markets (Bodija, Sango, Mokola, Eleyele, Agbowo and Ojoo) in Ibadan, Oyo state. They were placed in different sterile sample bags which were labeled appropriately before bringing them to the Pathology Laboratory, Department of Botany, University of Ibadan. Isolation of fungi from the rotting samples was carried out using pour plate method on acidified Potato Dextrose Agar (APDA). Pathogenicity test was also conducted for the isolated fungi. All experiments were done in duplicates and all plates were incubated at 25°C ± 2°C for 7 days. Pure cultures were obtained and identified and each isolated fungus was recorded as 1 which means present and 0 which means absent. The data obtained were analyzed using SAS version 9.3 at p ≤ 0.05. A total of three fungi were isolated viz., Aspergillus flavus, Saccharomyces cerevisae and Aspergillus niger. Occurrence of A. niger and A. flavus in samples obtained from Bodija, Mokola, Sango and Ojoo markets were significantly (P ≤ 0.05) higher than those from the other two markets. Occurrence of S. cerevisae in samples obtained from Bodija and Mokola markets were significantly (P ≤ 0.05) higher than those from the other three markets. Location had significant impact on the occurrence of isolated fungi in the rotting watermelons. However, handling by vendors had no significant impact on occurrence of the isolated fungi. Vendors and consumers are advised to be mindful of place of purchase and to also maintain good general hygiene before consumption.
基金Supported by the National Social Science Fund of China(No.16BTQ058)
文摘‘Empowerment’is the result of pursuing special capabilities under a specific value orientation.The changes in related object capabilities triggered by scientific and technical information activities in the new environment are important to the national scientific and technical(S&T)information governance.Based on the empowerment theories and evaluation practices,this study attempts to construct an empowerment evaluation framework for national S&T information governance and takes the participatory technology assessment and Altmetrics methods as examples to demonstrate its advantages:1)The capability changes and development potential are regarded as important basis for evaluation;2)The multi-person participation and multi-indicator comprehensive evaluation method is conducive to the democratic and objective nature of science and technology information governance policy formulation.
