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MEAsUREMENT OF PRIMARY PRODUcTION IN AN ENcLOsED WATER cOLUMN

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Acta Oceanologica sinica 1986年第4期5卷 584-592页

作者：吴晋平 ,F.A.WHITNEY,c.s.wong Institute of Ocean sciences sidney B.c. canada Institute of Ocean sciences sidney B.c. canada

A cEE (2.5 m by 16 m) has been used to study the budget of organic production by measuring the changes in POc/N, oxygen and 14cO, uptake through three-week period. 14c primary production measurements were conducted with 4-hours and 24-hours incubation periods, and with size fractionation. Different types and sizes of bottle effects were examined. Results showed that the oxygen method production was highest, followed by the 14cO2 uptake method, and POc gain showed the lowest. The value of PQ should be more than 1.7. The ratio of 4-hour incubation to 24-hour incubation was 2.42±0.22, indicating that net daily production is equal to 9.7±0.9 h of illuminated growth. Different types and sizes of bottles had little effect on primary production.

关键词： than MEAsUREMENT OF PRIMARY PRODUcTION IN AN ENcLOsED WATER cOLUMN POc

Pulse Generation by Mode-Beating in a Dual-Wavelength Injection-Locked Laser

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光学学报 2003年第S1期23卷 -页

作者： c.W.chow c.s.wong H.K.Tsang Department of Electronic Engineering The Chinese University of Hong Kong Shatin Hong Kong ChinaDepartment of Electronic Engineering The Chinese University of Hong Kong Shatin Hong Kong ChinaDepartment of Electronic Engineering The Chinese University of Hong Kong Shatin Hong Kong China

Generating of repetition-rate tunable optical pulses is achieved by mode-beating within a cW-operated Fabry-Perot laser. The repetition-rate was tunable from 6GHz to 32GHz and may be synchronized by a low frequency (5... 详细信息

关键词： mode on as by Pulse Generation by Mode-Beating in a Dual-Wavelength Injection-Locked Laser FP in

All-Optical Wavelength conversion with Amplitude Equalization and Pulse shaping

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光学学报 2003年第S1期23卷 491-492页

A dual-wavelength-injection-locked (DWIL) Fabry-Perot (FP) laser is used as an all-optical wavelength converter and regenerator. Regenerated pulses have narrower pulse-width of 37ps. Power penalty and extinction-ratio... 详细信息

关键词： EDFA on in as of mode FP All-Optical Wavelength conversion with Amplitude Equalization and Pulse shaping with dBm

THE EFFEcT OF MINE TAILINGs ON LEVELs OF HEAVY METALs IN sEAWATER

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Acta Oceanologica sinica 1986年第3期5卷 401-415页

作者： c.s.wong,F.A.WHITNEY,W.K.JOHNsON,LU XIANKUN,WUJINPING,WUsHENGsAN,LIJINXIA Ocean chemistry Division Institute of Ocean sciences sidney B.c. canada Ocean chemistry Division Institute of Ocean sciences sidney B.c. canada Ocean chemistry Division Institute of Ocean sciences sidney B.c. canada shandong college of Oceanology Qingdao china Third Institute of Oceanography state Oceanic Administration Xiamen china Third Institute of Oceanography state Oceanic Administration Xiamen china Third Institute of Oceanography state Oceanic Administration Xiamen china

changes in levels of heavy metals in seawater resulting from the addition of mine tailings were studied using plastic enclosures. Nominal concentrations of 10 mg l-1 and 100 mg l-1 of mine tailings from a B. c. molybdenum mine were added, and the metal levels were followed together with sedimentation rates, particle size distribution and other oceanographic and biological time-series parameters over sixteen days. No substantial elevation in levels of zinc, cadmium and copper was observed in the tailing bags compared to that in a background control bag with no addition of tailings. Lead showed a substantial increase in seawater following tailing addition and its removal apparently was with detritus settling following a plankton bloom, and inorganic settling of fine tailing particles.

关键词： Pb THE EFFEcT OF MINE TAILINGs ON LEVELs OF HEAVY METALs IN sEAWATER cd

A sTUDY ON THE FLUX, sPEcIATION, AND BUDGET OFMERcURY IN cONTROLLED EXPEEIMENTAL EcOsYsTEMs

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Journal of Oceanology and Limnology 1987年第2期 146-160页

作者：陆贤崑,吴晋平,K.W.Johnson,F.A.Whitney,c.s.wong shandong college of Oceanology Third Institute of Oceanography sOA Institute of Ocean sciences sidney B.c. canada Institute of Ocean sciences sidney B.c. canada Institute of Ocean sciences sidney B.c. canada

The lowest addition of mercury (0.1 ug Hg 1-1) was used in cEEs for research on mercury flux, speciation and budget. The removal behavior of mercury by phytoplankton in water columns of cEEs can be described by first order kinetic equations for total and particulate mercury in the cEE spiked by mercury. The removal rate of mercury in water columns depends on the size and productivity of phytoplanton in a water column to which mercuric ions were added. A 4.4 day half-life time and a 2.8 day half-life time for total and particulate mercury respectively was obtained in diatom bloom. During microflagellate bloom a 30 day total mercury half-life time was estimated with increase of particulate mercury in the water column. The 0.010 ug Hg cm-2y-1 mercury flux rate that was attained in the control bag agreed with the values from field measurements in saanich Inlet where the bags Were *** proportion of total mercury to dissolved and particulate mercury depended also on the size, productivity, and concen

关键词： In sPEcIATION A sTUDY ON THE FLUX AND BUDGET OFMERcURY IN cONTROLLED EXPEEIMENTAL EcOsYsTEMs

Tribological behavior of lubricant-impregnated porous polyimide

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Friction 2024年第4期12卷 711-725页

作者： Jinbang LI Ningning ZHOU Janet s.s.wong school of Mechanical Engineering and Mechanics Ningbo UniversityNingbo 315211China Beijing Key Laboratory of Long-life Technology of Precise Rotation and Transmission Mechanisms Beijing Institute of Control EngineeringBeijing 100029China Department of Mechanical Engineering Imperial College LondonLondon SW72AZUK

Porous materials impregnated with lubricants can be used in conditions where limited lubricant is *** this work,three porous polyimides(PPI)with different densities were ***(PAO)impregnated PPI(iPPI)discs were rubbed against steel and sapphire *** operando observations of the iPPI-sapphire contacts show that oil is released under an applied load,forming a meniscus around *** at the outlet is created at high sliding *** amount of released oil increases with increasing PPI *** moduli,E*,estimated based on the actual contact size show that trapped oil in iPPIs contributes to load *** higher speeds,tribological rehydration of the contact occurs in low density iPPI,with that E*rises with *** high density PPIs,high speeds give a constantly high E*which is limited by the viscoelastic properties of the PPI network and possibly the rate of oil *** of iPPI-steel contacts is governed by the mechanical properties of the PPI,the flow of the lubricant,and the roughness of the PPI *** low-and medium-density(highly porous,high roughness)PPIs,large amount of oil is released,and lubrication is mainly via lubricant restricted in the contact in the pores and possibly tribological *** high density(low porosity)PPI,with lower roughness,hydrodynamic lubrication is achieved which gives the lowest *** results show that polymeric porous materials for effective lubrication require the optimization of its surface roughness,stiffness,oil flow,and oil retentions.

关键词： polyimide porous material friction mechanism polymer limited lubrication

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海水中ng/Ⅰ级汞的贮存及行为研究

分析化学 1986年第2期 98-101+89页

作者：陆贤崑 K.W.Johnson c.s.wong 山东海洋学院化学系 Institute of Ocean sciences B.c.sidhey canada Institute of Ocean sciences B.c.sidhey canada

关于天然水含汞样品的贮存问题,已经研究了十年以上。多数作者认为,贮存天然水样的主要问题来自汞在容器壁上的吸附,造成样品汞损失严重。汞的挥发损失被认为是第二个重要误差来源。但对上述两种损失的比例,不同作者的结果相差较远。另... 详细信息

关于天然水含汞样品的贮存问题,已经研究了十年以上。多数作者认为,贮存天然水样的主要问题来自汞在容器壁上的吸附,造成样品汞损失严重。汞的挥发损失被认为是第二个重要误差来源。但对上述两种损失的比例,不同作者的结果相差较远。另外,容器内汞的溶出沾污也被认为是贮存时的可能误差来源。保存天然水样品的方法可归为选择适当保护剂及适当容器。保护剂可分为:酸(硝酸、硫酸等),氧化剂(高锰酸钾、过硫酸钾、四氯代金酸等),以及络合配位体(氯离子、碘离子、氰离子等)。常用容器有Pyrex等硬质玻璃瓶、聚乙烯或聚四氟乙烯容器。不过不同作者对容器材料和保护剂类型所提出的结果有时相互矛盾。作者认为,容器预处理、样品介质、分析方法灵敏度,尤其是样品中汞浓度,都会对结果产生重大影响。目前,外海海水汞的浓度范围在0.5—8ng/L。比七十年代中期测得范围低约一个数量级。该低含量汞的海水贮存性质,尚缺具体研究。本文取加拿大沙奈奇湾(saanich Inlet)天然海水,用不同容器和保护剂,进行贮存实验研究。

关键词：海水保护剂 ng 聚乙烯瓶无机汞聚四氟乙烯含氟高聚物

Artificial intelligence analysis of videos to augment clinical assessment:an overview

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Neural Regeneration Research 2024年第4期19卷 717-718页

作者： David c.wong stefan Williams University of Leeds Leeds Teaching Hospitals Trust LeedsUK

Observation is a fundamental part of the practice of clinical *** of movement is particularly important for the *** such as Parkinson’s disease,multiple sclerosis,stroke,epilepsy,and many others affect a person’s movement in characteristic *** some conditions,changes in the patient’s voice can be included in this-changes in sound caused by changes in the movements of *** clinician’s detection of a characteristic abnormality,and their judgment of its severity,plays a central role in both diagnosis and the assessment of prognosis or response to ***,that practice depends upon a limited resource of experienced *** addition,these experts are limited by human visual judgment,which cannot reliably or precisely detect and measure small or subtle changes in movement(Williams et al.,2023).

关键词： clinical epilepsy diagnosis

中型海洋围隔生态系中汞通量、形态和收支的研究

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海洋与湖沼 1986年第4期 307-317页

作者：陆贤崑 K.W.Johnson F.A.Whitney c.s.wong 吴晋平山东海洋学院海洋科学研究所海洋科学研究所海洋科学研究所国家海洋局第三海洋研究所青岛悉尼加拿大悉尼加拿大悉尼加拿大厦门

在海洋围隔生态系实验中加入迄今最低浓度的无机汞,以研究汞的迁移通量、形态分布和收支。加汞后,汞从水柱中被排除的行为可用一级反应动力学描述。在该生态系内汞被排除的半寿期,与初级生产力和浮游植物特性如个体大小、浮游能力等有... 详细信息

在海洋围隔生态系实验中加入迄今最低浓度的无机汞,以研究汞的迁移通量、形态分布和收支。加汞后,汞从水柱中被排除的行为可用一级反应动力学描述。在该生态系内汞被排除的半寿期,与初级生产力和浮游植物特性如个体大小、浮游能力等有关。对照围隔生态系内,0.01μg Hg/cm2·a的汞垂直通量与海湾现场测量值一致。在自然条件下,溶解汞是水中的主要形态,占73％。加汞后,颗粒汞迅速上升,可达70％以上。浮游植物对汞的富集因子为10～5级。汞在沉积物、器壁和水体中的回收只占52.3％。

关键词：围隔生态系总汞初级生产力生物生产力浮游植物水生植物鞭毛藻颗粒汞硅藻无机汞收支