检索范围:
排序: 展示方式:
Cryogenic minimum quantity lubrication machining: from mechanism to application
《机械工程前沿(英文)》 2021年 第16卷 第4期 页码 649-697 doi: 10.1007/s11465-021-0654-2
关键词: cryogenic minimum quantity lubrication (CMQL) cryogenic medium processing mode device application mechanism application effect
Chuhan Fu, Zhuoxi Li, Zengran Sun, Shaoqu Xie
《化学科学与工程前沿(英文)》 2021年 第15卷 第4期 页码 854-871 doi: 10.1007/s11705-020-1980-3
关键词: salting-out sugaring-out extraction biofuels biochemicals application
Application of MoS in the space environment: a review
《机械工程前沿(英文)》 2023年 第18卷 第3期 doi: 10.1007/s11465-023-0755-1
关键词: MoS2 soft metal space environment surface texture synergistic effect vibration
A review of low-temperature plasma-assisted machining: from mechanism to application
《机械工程前沿(英文)》 2023年 第18卷 第1期 doi: 10.1007/s11465-022-0734-y
关键词: low-temperature plasma difficult-to-cut material machinability hydrophilization effect Rehbinder effect
黎强
《中国工程科学》 2003年 第5卷 第6期 页码 59-62
以矿物加工领域新出现的空气重介质流化床选矿方法提出的背景和实现途径为基础,运用发散—收敛模型讨论了解决工程技术问题时创造性成果的产生机制,分析了创造性思维的应用过程及其启示作用。
Weixiang YAO, Xianju WANG, Yubin LAN, Ji JIN
《农业科学与工程前沿(英文)》 2018年 第5卷 第4期 页码 455-461 doi: 10.15302/J-FASE-2018232
Prewetting process can reduce the contact angle between the droplet and the leaf blade, so that the droplet can more easily wet and spread, thereby increasing the quantity of deposition. To improve the effectiveness of pesticides on cotton leaves, prewetting by single-rotor electric unmanned aerial vehicles (UAV) was studied, focusing on the effects of pesticide deposition on cotton leaves during the flowering period. Cotton leaves in 0°–30°, 30°–60°, 60°–90° leaf blade angle ranges (angle between the leaf blade and the horizontal plane) were examined. In the first experiment, four different prewetting volumes (0, 1.6, 3.2 and 4.8 L) were sprayed by a single-rotor electric UAV on four cotton plots (plots A to D) each with an area of 120 m , and then each area was sprayed with a 0.8% (w/v) ponceau 2R solution by another single-rotor electric UAV. The results revealed that with no prewetting, droplet deposition quantity decreased with increasing leaf blade inclination. After prewetting, the mean droplet deposition quantity on plots B, C and D increased by 39.8%, 9.7% and 24.9%, respectively. The prewetting rate of 1.6 L per 120 m had the most significant effect on improving the deposition of droplets. It was also found that the mean droplet deposition quantity in each leaf blade angle range increased after prewetting. For the leaf blade angle range 60° to 90°, this increase was the most pronounced, with 0.043, 0.062, 0.057 and 0.048 L·cm in plots A–D, respectively. Also, droplet deposition uniformity in the leaf blade angle range 60°–90° was better after prewetting. These results should provide a valuable reference for future research and practice to improve the effectiveness of pesticides applied to cotton by aerial applications.
关键词: aerial spray cotton deposition flowering period leaf angle prewetting UAV
Chen Wang, Jun Wang, Jianqiang Wang, Meiqing Shen
《环境科学与工程前沿(英文)》 2021年 第15卷 第2期 doi: 10.1007/s11783-020-1322-1
关键词: Selective catalytic reduction Cu/SAPO-34 catalyst Ion-exchanged K Low-temperature hydrothermal stability Fe/Beta catalyst
Application of ecosystem health cost-effect analysis in eco-planning in Guangzhou City, China
GUO Xiurui, MAO Xianqiang, YANG Jurong, YANG Zhifeng
《环境科学与工程前沿(英文)》 2007年 第1卷 第3期 页码 299-304 doi: 10.1007/s11783-007-0050-0
关键词: ±10 % decision support influence eco-environmental construction planning
朱正和,傅依备,蒙大桥,唐永健
《中国工程科学》 2011年 第13卷 第1期 页码 21-24
应用相对论理论(Dirac)来计算 C、O、S、Se、Te、Sm和Pu原子的相对论和非相对论的电子状态和能量,比较相对论和非相对论的能量差别后得到:如果以 O 原子的相对论和非相对论能量差为1,则 S、Se、Sm和Pu原子的相对论和非相对论能量差分别为 17.5、479、6 781 和 46 166。就钚和氧相比,质量的相对论效应增加46 166倍。Pu的相对论的和非相对论的能量的差占总能量的 8.72 %,所以对重元素,应用相对论的计算是很必要的。
孟昭礼,方向阳,罗兰,尚坚
《中国工程科学》 2007年 第9卷 第3期 页码 28-34
银泰(1-对羟基苯基丁酮)是以银杏外种皮提纯物白果酚为先导化合物仿生合成的一种杀菌剂。其中,银杏果实乙醇粗提物8.3倍和25倍液对苹果腐烂病抑菌率达100%和50%;银杏果实外种皮提纯物白果酚200倍和400倍液对苹果腐烂病病菌抑菌率均为100%。20%银泰微乳剂对苹果腐烂病、番茄灰霉病等4种病菌 EC50 为17.26~48.43mg/L,分别优于对照药剂;田间防治小麦纹枯病等4种病害效果达85%以上;对非靶标生物安全,且不易产生抗药性。仿生合成的银泰原药对大白鼠毒性试验,经口、经皮 LD50 均为4640mg/kg,20%银泰乳油对大白鼠毒性试验,经口LD50为3160mg/kg,经皮 LD50 为2150mg/kg;亚慢性经口毒性(90d)试验雌为19.1mg/kg,雄为18.3mg/kg;Ames、细胞微核和染色体畸变试验均为阴性结果。
ZHOU Hongbo, CHEN Zhuchang
《结构与土木工程前沿(英文)》 2007年 第1卷 第4期 页码 458-463 doi: 10.1007/s11709-007-0062-7
A review on different theoretical models of electrocaloric effect for refrigeration
《能源前沿(英文)》 2023年 第17卷 第4期 页码 478-503 doi: 10.1007/s11708-023-0884-6
关键词: electrocaloric effect effective Hamiltonian phase-field modeling different theoretical models
A new miniaturized engine based on thermomagnetic effect of magnetic fluids
Lujun ZHOU, Yimin XUAN, Qiang LI, Wenlei LIAN
《能源前沿(英文)》 2009年 第3卷 第2期 页码 160-166 doi: 10.1007/s11708-009-0018-9
标题 作者 时间 类型 操作
A review of salting-out effect and sugaring-out effect: driving forces for novel liquid-liquid extraction
Chuhan Fu, Zhuoxi Li, Zengran Sun, Shaoqu Xie
期刊论文
Effect of UAV prewetting application during the flowering period of cotton on pesticide droplet deposition
Weixiang YAO, Xianju WANG, Yubin LAN, Ji JIN
期刊论文
Promotional effect of ion-exchanged K on the low-temperature hydrothermal stability of Cu/SAPO-34 andits synergic application with Fe/Beta catalysts
Chen Wang, Jun Wang, Jianqiang Wang, Meiqing Shen
期刊论文
Application of ecosystem health cost-effect analysis in eco-planning in Guangzhou City, China
GUO Xiurui, MAO Xianqiang, YANG Jurong, YANG Zhifeng
期刊论文
高鑫:微波诱导热点效应及其在化工分离中的应用(2022年4月16日)
2022年06月09日
会议视频
李浩然:基于同伴效应与网络效应的“气代煤〞改造决策研究(2020年7月11日)
2022年05月19日
会议视频
Analysis of effect of different construction methods of piles on the end effect on skin friction of piles
ZHOU Hongbo, CHEN Zhuchang
期刊论文