A New Species of the Genus Nanhaipotamon (Decapoda:Potamid)

记述了采自福建省武平县的淡水蟹类南海属Nanhaipotamon一新种武平南海溪蟹N.wupingensissp.nov.本新种头胸甲显著隆起,雄性第1腹肢末部宽大,内侧呈半圆形扩张,外末角呈指状突出,末缘中部明显隆突.蟹体并殖吸虫囊蚴感染率27.3%(3/11).Nanhaipotamon wupingensis sp. nov(Fig.1～8)Holotype:♂,carapace length 22 mm,breadth 27.5 mm;allotype: ♀,length 20 mm,breadth 25 mm;paratypes: 3♂2♀,collected from Xiaba village of Wuping county,Fujian (116°2′N.,24°53′E.);October,1998;195～260 metres above sea level;breadth of the stream 0.5～1.5 metres,pH 6.0.All the type specimens are deposited in Fujian Research Institute of Parasite Disease,Fuzhou,Fujian Province.17 crabs were examined,3 of them infected with the metacercaria of Paragonimus westermani and Euparagonimus cenocopiosus.Carapace distinctly convex, surface smooth, cervical groove shallow.The end of the first pleopod of male,exceeding the suture between 4～5th sternum,Subteminal segment 3.0 times as long as the terminal segment. Terminal part widely,anteroborde mountain peaklike.On side distal end half roundshaped and strongly expanded abdominalinner.The subdistal segment of the second pleopod of male about 2.7 times as long as the distal segment. The abdominal of male triangularshaped,the sixth abdominal segment about 2.3 times as broad as long

干旱内陆河灌区节水农业综合技术体系研究与集成

本课题从工程节水、农艺节水、管理节水三个方面,集成了农业高效节水、水肥盐调控、生态保护、监测与管理等关键技术,提出了干旱内陆河灌区农业节水技术集成体系与应用模式。提出了仅需根据水流推进过程确定土壤入渗参数和田面糙率系数的新方法,简化了地面灌溉设计。提出了根据土壤剖面含水率变化估算柽柳生长条件下潜水蒸发的理论方法与数学模型,为解决天然植被实际生态耗水问题提供了简易可行的方法

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies