A pot experiment with a sandy loam soil and spring wheat as test crop was conducted to compare the N2O emission from soil system with plant cut off and from soil-plant system with plant kept. The results showed that a...A pot experiment with a sandy loam soil and spring wheat as test crop was conducted to compare the N2O emission from soil system with plant cut off and from soil-plant system with plant kept. The results showed that after urea fertilizer applied, the N2O emission from soil and soil-wheat system decreased exponentially with time, and its total amount was 0.34%~0.63% and 0.33%~0.58% of applied urea-N respectively, no significant difference being found between these two systems. The N2O emission had a very significant negative relationship (P = 0.01) with the biomass of wheat plant. A combined application of urease inhibitor hydroquinone and nitrification inhibitor dicyandiamide could reduce the N2O emission by 50%~83% and 46%~74%, respectivelyl from soil and soil-wheat system. The N2O was mainly produced and emitted from soil, and the soil biochemical regulation, i.e., applying related inhibitors into soil could effectively diminish the urea derived N2O emission.展开更多
Modeling plays an important role in understanding and implementation of manufacturing system under changing competitive environment. Agile manuincturing is a new pattern of production. It is the issue to identify, ana...Modeling plays an important role in understanding and implementation of manufacturing system under changing competitive environment. Agile manuincturing is a new pattern of production. It is the issue to identify, analyze and evaluate agility for involved people, information,process and organization. There is no commonly accepted analytical structure. The essence of agility is investigated and a model to develop agility is elucidated.展开更多
Introduction: The Ho:YAG-Laser is categorized as a potentially dangerous lithotripsy device (DIN: Class 4) for perforation which is mainly caused by the photonic energy the laser emits. Long time complications like ur...Introduction: The Ho:YAG-Laser is categorized as a potentially dangerous lithotripsy device (DIN: Class 4) for perforation which is mainly caused by the photonic energy the laser emits. Long time complications like ureteral strictures seem to be directed by thermal and mechanical injury. In this study different energy settings a) are being investigated, a DJ (double J stent) is placed beside the laser to simulate a therapy of a forgotten stent with reduction of the lumen b) due to the volume exploitation of the DJ, and direct contact between the laser fiber and the DJ in the ureter c) is simulated during laser exposure. Materials and Methods: We used the Ho:YAG-laser (Vera PulseTM, Coherent, Santa Clara USA) with a 365 μm diameter laser fiber. The settings of the laser were 0.6 J and 1 J pulse energy with a frequency of 5 Hz. The experimental setup was closely aligned with the clinical situation. The tip of the thermometer was attached inside the catheter through a puncture. The laser fiber was guided by means of a rigid URS video device (11.5 Ch). We had four different settings for a), b) and c) during the measurement: 1) Distance of 0.5 cm between the laser and the thermometer;without irrigation, 2) Distance of 0.5 cm between the laser and the thermometer;with irrigation, 3) Distance of 1 cm between the laser and the thermometer;without irrigation, 4) Distance of 1 cm between the laser and the thermometer;with irrigation. Results: The temperature in an empty ureter rises approximately by 5°C, when the laser energy is increased from 0.6 J to 1 J. When a DJ is inserted in the artificial ureter there is surprisingly almost no difference in the maximum temperature between the lower energy level (0.6 J) and the high energy level (1 J). However the time needed to reach the maximum temperature is noticibly less when using high energy levels. The reduction involume based on the placement of the DJ leads to a higher maximum temperature for the low energy setting. The third setting with direct laser fiber contact with the DJ produces the highest temperatures of up to 55°C. We think there must be a melting or burning of the DJ which leads to a temperature rise. Bubble formation was a sign of heating in the ureter in every setting without irrigation. A temperature fall off with increasing distance between the laser fiber and the thermometer is noticable when measuring without irrigation. Conclusion: There is no relevant heating with irrigation. Direct contact between the laser fiber and the DJ seems to evoke additional heating because of melting or underwater burning of the DJ. The maximum temperatures reached without irrigation are limited to a relatively small volume since the is a noticable temperature fall of when increasing the distance between the laser fiber and the thermometer.展开更多
Inauguration of China National Arts&Crafts Museum and China Intangible Cultural Heritage Museum and opening ceremony of the Exhibition"Treasures of China:An Exhibition of Chinese Intangible Cultural Heritage ...Inauguration of China National Arts&Crafts Museum and China Intangible Cultural Heritage Museum and opening ceremony of the Exhibition"Treasures of China:An Exhibition of Chinese Intangible Cultural Heritage and Arts and Crafts",were held on February 5,2022.展开更多
On the basis of performance and problems in land consolidation of Bengbu City,it is believed that land consolidation should focus on benefits of agriculture,farmers and countryside,strengthen consolidation of agricult...On the basis of performance and problems in land consolidation of Bengbu City,it is believed that land consolidation should focus on benefits of agriculture,farmers and countryside,strengthen consolidation of agricultural land and infrastructure construction.展开更多
PARCS NATIONAUX ET RESERVES EN CHINE ET EN AFRIQUE CHINE Lac Qinghai Le Lac Qinghai,connu aussi sous le nom de Lac Kokonor,est le plus grand lac interieur et lac sale de Chine.
从示范中学习(Learning from Demonstration,LfD),是指机器人学习人类的操作工作,相比传统的脚本指令操作机器人更简单,而机器人需要学习人类示范来快速适应环境的变化。对于机器人运动轨迹学习之后进行技能泛化,GMR-GPR生成的轨迹无法...从示范中学习(Learning from Demonstration,LfD),是指机器人学习人类的操作工作,相比传统的脚本指令操作机器人更简单,而机器人需要学习人类示范来快速适应环境的变化。对于机器人运动轨迹学习之后进行技能泛化,GMR-GPR生成的轨迹无法精确通过每个部分起始约束点,基于GMR-GPR算法进行改进,进行增量GMR-GPR技能泛化,在尽可能保持教学动作的真实意图的同时,也能够同时经过约束点,生成的轨迹进一步提高在约束点区域的泛化性,此外,通过执行字母仿真和UR5e机器人实验,验证和分析了所提方法的可用性。结果表明,所改进的方法能够提供可靠的解决方案,在尽可能保留真实演示意图的同时,挽回示教者纠正意愿的损失。展开更多
An orthorhombic crystal form of a recombi-nant yeast prion protein with shortened N-terminal, 90Ure2p, has been obtained. Crystals were grown by the vapordiffu-sion technique against a mother liquor containing imidazo...An orthorhombic crystal form of a recombi-nant yeast prion protein with shortened N-terminal, 90Ure2p, has been obtained. Crystals were grown by the vapordiffu-sion technique against a mother liquor containing imidazole. Crystals belong to the primitive orthorhombic lattice with the cell parameters a = 54.5 A, b = 74.7 A, c = 131.0 A. The crystals diffract to beyond 3.0 A resolution at a synchrotron beamline.展开更多
基金the National Natural Science Foundation of China (No. 39730110) and the Ministryof Foreign Affairs, Belgium (ABOS) through "VL
文摘A pot experiment with a sandy loam soil and spring wheat as test crop was conducted to compare the N2O emission from soil system with plant cut off and from soil-plant system with plant kept. The results showed that after urea fertilizer applied, the N2O emission from soil and soil-wheat system decreased exponentially with time, and its total amount was 0.34%~0.63% and 0.33%~0.58% of applied urea-N respectively, no significant difference being found between these two systems. The N2O emission had a very significant negative relationship (P = 0.01) with the biomass of wheat plant. A combined application of urease inhibitor hydroquinone and nitrification inhibitor dicyandiamide could reduce the N2O emission by 50%~83% and 46%~74%, respectivelyl from soil and soil-wheat system. The N2O was mainly produced and emitted from soil, and the soil biochemical regulation, i.e., applying related inhibitors into soil could effectively diminish the urea derived N2O emission.
文摘Modeling plays an important role in understanding and implementation of manufacturing system under changing competitive environment. Agile manuincturing is a new pattern of production. It is the issue to identify, analyze and evaluate agility for involved people, information,process and organization. There is no commonly accepted analytical structure. The essence of agility is investigated and a model to develop agility is elucidated.
文摘Introduction: The Ho:YAG-Laser is categorized as a potentially dangerous lithotripsy device (DIN: Class 4) for perforation which is mainly caused by the photonic energy the laser emits. Long time complications like ureteral strictures seem to be directed by thermal and mechanical injury. In this study different energy settings a) are being investigated, a DJ (double J stent) is placed beside the laser to simulate a therapy of a forgotten stent with reduction of the lumen b) due to the volume exploitation of the DJ, and direct contact between the laser fiber and the DJ in the ureter c) is simulated during laser exposure. Materials and Methods: We used the Ho:YAG-laser (Vera PulseTM, Coherent, Santa Clara USA) with a 365 μm diameter laser fiber. The settings of the laser were 0.6 J and 1 J pulse energy with a frequency of 5 Hz. The experimental setup was closely aligned with the clinical situation. The tip of the thermometer was attached inside the catheter through a puncture. The laser fiber was guided by means of a rigid URS video device (11.5 Ch). We had four different settings for a), b) and c) during the measurement: 1) Distance of 0.5 cm between the laser and the thermometer;without irrigation, 2) Distance of 0.5 cm between the laser and the thermometer;with irrigation, 3) Distance of 1 cm between the laser and the thermometer;without irrigation, 4) Distance of 1 cm between the laser and the thermometer;with irrigation. Results: The temperature in an empty ureter rises approximately by 5°C, when the laser energy is increased from 0.6 J to 1 J. When a DJ is inserted in the artificial ureter there is surprisingly almost no difference in the maximum temperature between the lower energy level (0.6 J) and the high energy level (1 J). However the time needed to reach the maximum temperature is noticibly less when using high energy levels. The reduction involume based on the placement of the DJ leads to a higher maximum temperature for the low energy setting. The third setting with direct laser fiber contact with the DJ produces the highest temperatures of up to 55°C. We think there must be a melting or burning of the DJ which leads to a temperature rise. Bubble formation was a sign of heating in the ureter in every setting without irrigation. A temperature fall off with increasing distance between the laser fiber and the thermometer is noticable when measuring without irrigation. Conclusion: There is no relevant heating with irrigation. Direct contact between the laser fiber and the DJ seems to evoke additional heating because of melting or underwater burning of the DJ. The maximum temperatures reached without irrigation are limited to a relatively small volume since the is a noticable temperature fall of when increasing the distance between the laser fiber and the thermometer.
文摘Inauguration of China National Arts&Crafts Museum and China Intangible Cultural Heritage Museum and opening ceremony of the Exhibition"Treasures of China:An Exhibition of Chinese Intangible Cultural Heritage and Arts and Crafts",were held on February 5,2022.
文摘On the basis of performance and problems in land consolidation of Bengbu City,it is believed that land consolidation should focus on benefits of agriculture,farmers and countryside,strengthen consolidation of agricultural land and infrastructure construction.
文摘PARCS NATIONAUX ET RESERVES EN CHINE ET EN AFRIQUE CHINE Lac Qinghai Le Lac Qinghai,connu aussi sous le nom de Lac Kokonor,est le plus grand lac interieur et lac sale de Chine.
文摘从示范中学习(Learning from Demonstration,LfD),是指机器人学习人类的操作工作,相比传统的脚本指令操作机器人更简单,而机器人需要学习人类示范来快速适应环境的变化。对于机器人运动轨迹学习之后进行技能泛化,GMR-GPR生成的轨迹无法精确通过每个部分起始约束点,基于GMR-GPR算法进行改进,进行增量GMR-GPR技能泛化,在尽可能保持教学动作的真实意图的同时,也能够同时经过约束点,生成的轨迹进一步提高在约束点区域的泛化性,此外,通过执行字母仿真和UR5e机器人实验,验证和分析了所提方法的可用性。结果表明,所改进的方法能够提供可靠的解决方案,在尽可能保留真实演示意图的同时,挽回示教者纠正意愿的损失。
基金This work was supported by the National NaturalScience Foundation of China (Grant Nos. 39870174 and 39970155) the State "863" High-Tech Project (Grant No. 103130306) and "973" Project (Grant Nos. G1999075602, G1999011902 and 1998051105).
文摘An orthorhombic crystal form of a recombi-nant yeast prion protein with shortened N-terminal, 90Ure2p, has been obtained. Crystals were grown by the vapordiffu-sion technique against a mother liquor containing imidazole. Crystals belong to the primitive orthorhombic lattice with the cell parameters a = 54.5 A, b = 74.7 A, c = 131.0 A. The crystals diffract to beyond 3.0 A resolution at a synchrotron beamline.
