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| 1 | Improved grey prediction model based on exponential grey action quantity显示文摘With the passage of time, it has become important to investigate new methods for updating data to better fit the trends of the grey prediction model. The traditional GM(1,1) usually sets the grey action quantity as a constant. Therefore, it cannot effectively fit the dynamic characteristics of the sequence, which results in the grey model having a low precision. The linear grey action quantity model cannot represent the index change law. This paper presents a grey action quantity model, the exponential optimization grey model(EOGM(1,1)), based on the exponential type of grey action quantity; it is constructed based on the exponential characteristics of the grey prediction model. The model can fully reflect the exponential characteristics of the simulation series with time. The exponential sequence has a higher fitting accuracy. The optimized result is verified using a numerical example for the fluctuating sequence and a case study for the index of the tertiary industry's GDP. The results show that the model improves the precision of the grey forecasting model and reduces the prediction error. | YIN Kedong GENG Yan LI Xuemei | 2018 | Journal of Systems Engineering and Electronics2018，29，3： | 14 |
| 2 | Chemometric study of spatial variations of environmental and ecological characteristics in the Zhujiang River (Pearl River) Estuary and adjacent waters显示文摘Chemometric approach based on principal component analysis(PCA) was utilized to examine the spatial variances of environmental and ecological characteristics in the Zhujiang River(Pearl River) Estuary and adjacent waters(ZREAW) in the South China Sea. The PCA result shows that the ZREAW can be divided into different zones according to the principal components and geographical locations of the study stations,and indicates that there are distinct regional variances on environmental features and the corresponding phytoplankton biomass and community structures among different areas. The spatial distribution of ecological features was implied to be influenced by various degrees of the different water resources,such as the Pearl River discharges,the coastal current and the oceanic water from the South China Sea. The variation of the biomass maximum zone and the complex impacts on the spatial distributions of phytoplankton biomass and production were also evaluated. | SONG Xingyu HUANG Liangmin ZHANG Jianlin YIN Kedong LIU Sheng TAN Yehui YIN Jianqiang | 2011 | Acta Oceanologica Sinica2011，30，4： | 5 |
| 3 | Spatial and Seasonal Variations of Nutrients in Sediment Profiles and Their Sediment-Water Fluxes in the Pearl River Estuary,Southern China显示文摘Three cruises were launched in the Pearl River Estuary(PRE)in 2005 to investigate the biogeochemical cycling of nutrients associated with early diagenesis related to degradation of organic matter.Seasonal and spatial variations of pore water nutrient concentrations and profile patterns in sediments were studied.Nutrient fluxes at the sediment-water interface(SWI)were measured by incubation experiments,and we here discussed the accumulation and transformation processes of nutrients at the SWI.The nutrients generally decreased from the Pearl River outlets downstream,indicating anthropogenic influences on the nutrient inputs in the estuary.NO3-N concentration was the highest of the three forms of DIN(dissolved inorganic nitrogen,the sum of NH4-N,NO3-N and NO2-N)in the overlying water,and NH4-N was the main component of DIN in pore water.The gradual increase of NH4-N and the rapid decrease of NO3-N with sediment depth provided the evidence for anaerobic conditions below the SWI.Negative fluxes of NO3-N and positive fluxes of NH4-N were commonly observed,suggesting the denitrification of NO3-N at the SWI.The DIN flux direction suggested that the sediment was the sink of DIN in spring,however,the sediment was generally the source of DIN in summer and winter.PO4-P distribution patterns were distinct while SiO4-Si inconspicuously varied in sediment profiles in different seasons.The flux results indicated that PO4-P mainly diffused from the water column to the sediment while SiO4-Si mainly diffused from the sediment to the water column.Generally,the incubated fluxes were the coupling of diffusion,bioturbation and biochemical reactions,and were relatively accurate in this study. | Ling Zhang Lu Wang Kedong Yin Ying Lü Yongqiang Yang Xiaoping Huang | 2014 | Journal of Earth Science2014，25，1： | 5 |
| 4 | Amino acids in the Pearl River Estuary and adjacent waters: origins, transformation and degradation 显示文摘 | Chen Jianfang Li Yah Yin Kedong Jin Hai-yan | 2004 | Cont Shelf Res2004，24，16： | 1 |
| 5 | Absorption coefficient of yellow substance in the Pearl River estuary显示文摘 | Chen Chuqun Shi Ping Yin Kedong etal | 2002 | SPIE2002，4892，： | 1 |
| 6 | Phytoplankton Biomass and Production in Subtropical Hong Kong Waters: Influence of the Pearl River Outflow显示文摘 | Alvin Y. T. Ho Jie Xu Kedong Yin Yuelu Jiang Xiangcheng Yuan Lei He Donald M. Anderson Joseph H. W. Lee Paul J. Harrison | 2010 | Estuaries and Coasts2010，，1： | 1 |
| 7 | Monetary Convergence in East Asian Countries Relative to China显示文摘 | Chi-Wei Su Hsu-Ling Chang Tsangyao Chang Kedong Yin | 2014 | International Review of Economics and Finance2014，，22： | 1 |
| 8 | Influence of monsoons and oceanographic processes on red tides in Hong Kong waters 显示文摘 | Yin Kedong | 2003 | Marine Ecology Progress Series2003，262，： | 1 |
| 9 | Red tides during Spring 1998 in Hong Kong:is EL Nino Responsible?显示文摘 | Kedong Yin | 1999 | Marine Ecology Progress Series1999，187，： | 1 |
| 10 | Dy- namics of nutrients and phytoplankton biomass in the Pearl River estuary and adjacent waters of Hong Kong during summer: Preliminary evidence for phosphorus and silicon limitation 显示文摘 | YIN Kedong QIAN Peiyuan CHEN Jayc | 2000 | Marine Ecology Progress Se- ries2000，194，： | 1 |
| 11 | Effects of ultraviolet radiation B (UV-B) on photosynthesis of natural phytoplankton assemblages in a marine bay in Southern China显示文摘Solar ultraviolet radiation B (UVB) is known to have inhibitive effects on phytoplankton photosynthesis. UVB light decreases rapidly with increasing depth in the water column and exerts different degrees of UVB inhibitive effects on phytoplankton photosynthesis. In this study, the objectives were to quantify effects of UVB on phytoplankton photosynthesis and quantum yield, and to examine UVB effects on phytoplankton photosynthesis when light varies. The insitu experiments were conducted in Da Ya Bay, which is a semienclosed area in the subtropical South China. The results showed a significant reduction of photosynthetic rates and quantum yield in the presence of UVB. Maximum photosynthetic rates (Pmax) and maximum quantum yield (Φmax) were 11%-22% and 17%-49% less under solar radiation with UVB than without UVB. A simplified model was developed to describe the UVB biologically effective fluence rate (E*inh) as an exponential decay function of depth. Light-shift experiments, in which water samples from the surface and at depth of 4 m were divided into several subsamples, and each subsamples were then incubated at different depths with and without UVB in the water column, showed that phytoplankton from the deeper water (4 m) had more inhibitive rates by UVB than that from the surface when exposed to the same light condition. | YUAN XiangCheng YIN KeDong ZHOU WeiHua CAO WenXi XU XiaoQiang ZHAO Di | 2007 | Chinese Science Bulletin2007，52，4： | 1 |
| 12 | Resistance of Hong Kong waters to nutrient enrichment: assessment of the role of physical processes in reducing eutrophication 显示文摘 | XU Jie YIN Kedong LEE J H W | 2012 | Journal of Oceanography2012，68，： | 1 |
| 13 | Red tides during spring 1998 in Hong Kong:is El Nino responsible显示文摘 | Kedong Yin Paul J H Jay Chen | 1999 | Marine ecology progress series1999，，187： | 1 |
| 14 | Ratio of nitrogen to phosphorus in the Pearl River and effects on the estuarine coastal waters: Nutrient management strategy in Hong Kong显示文摘 | Kedong Yin Paul J. Harrison Malcolm Broom C.H. Chung | 2010 | Physics and Chemistry of the Earth2010，，9： | 1 |
| 15 | Monsoonal influence on seasonal variations in nutrients and phytoplankton biomass in coastal waters of Hong Kong in the vicinity of the Pearl River estuary 显示文摘 | YIN Kedong | 2002 | Marine Ecology-Progress Series2002，245，： | 1 |
| 16 | Nitrogen over enrich- ment in subtropical Pearl River estuarine coastal waters: possible causes and consequences显示文摘 | YIN Kedong HARRISON P J | 2008 | Continental Shelf Research2008，28，： | 1 |
| 17 | The influence of late summer typhoons and high river discharge on water quality in Hong Kong waters显示文摘 | ZHOU Weihua YIN Kedong HARRISON P J | 2012 | Es- tuarine Coastal and Shelf Science2012，111，： | 1 |
| 18 | Regeneration and utilization of nutrients during collapse of a Mesodinium rubrum red tide and its influence on phytoplankton species composition显示文摘High-biomass red tides occur frequently in some semi-enclosed bays of Hong Kong where ambient nutrients are not high enough to support such a high phytoplankton biomass. These high-biomass red tides release massive inorganic nutrients into local waters during their collapse. We hypothesized that the massive inorganic nutrients released from the collapse of red tides would fuel growth of other phytoplankton species. This could influence phytoplankton species composition. We tested the hypothesis using a red tide event caused by Mesodinium rubrum(M. rubrum) in a semi-enclosed bay, Port Shelter. The red tide patch had a cell density as high as 5.0×10~5 cells L^(-1), and high chlorophyll a(63.71 μg L^(-1)). Ambient inorganic nutrients(nitrate:NO_3^-, ammonium: NH_4^+, phosphate: PO_4^(3-), silicate: SiO_4^(3-)) were low both in the red tide patch and the non-red-tide patch(clear waters outside the red tide patch). Nutrient addition experiments were conducted by adding all the inorganic nutrients to water samples from the two patches followed by incubation for 9 days. The results showed that the addition of inorganic nutrients did not sustain high M. rubrum cell density, which collapsed after day 1, and did not drive M. rubrum in the non-red-tide patch sample to the same high-cell density in the red tide patch sample. This confirmed that nutrients were not the driving factor for the formation of this red tide event, or for its collapse. The death of M. rubrum after day 1 released high concentrations of NO_3^-,PO_4^(3-), SiO_4^(3-), NH_4^+, and urea. Bacterial abundance and heterotrophic activity increased, reaching the highest on day 3 or 4, and decreased as cell density of M. rubrum declined. The released nutrients stimulated growth of diatoms, such as Chaetoceros affinis var. circinalis, Thalassiothrix frauenfeldii, and Nitzschia sp., particularly with additions of SiO_4^(3-) treatments, and other species. These results demonstrated that initiation of M. rubrum red tides in the bay was not directly driven by nutrients.However, the massive inorganic nutrients released from the collapse of the red tide could induce a second bloom in low-ambient nutrient water, influencing phytoplankton species composition. | Yafeng ZHANG Xiuxian SONG Paul J.HARRISON Sheng LIU Zhiming YU Jinjun KAN Peiyuan QIAN Hao LIU Kedong YIN | 2018 | Science China Earth Sciences2018，61，10： | 1 |
| 19 | Variations in apparent oxygen utilization and effects of P addition on bacterial respiration in subtropical Hong Kong waters显示文摘 | YUAN XIANGCHENG YIN KEDONG HARRISON P J | | 0，，： | 1 |
| 20 | Shift from P to N limitation of phytoplankton growth across the Pearl River estuarine plume during summer显示文摘 | YIN KEDONG QIAN PEIYUAN WU W C S | | 0，，： | 1 |
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