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| 1 | FLOOD DISCHARGE AND ENERGY DISSIPATION BY JETS FROM OUTLETS IN HIGH ARCH DAM显示文摘In this thesis, the scale effect by an aerated water jet diffusing in the water upon the hydrodynamic pressure, the local riverbed scour by multiple layered jets and by those colliding in the vertical and the transverse directions, and the stability of the apron slab both in the inverted arch cushion pool and the flat bottom one by the large discharge and the high water head with 300m level are detailedly researched by means of model test and numerical simulation. A mathematic model simulating the destabilization of the flat bottomed slab is established to open out the mechanism of its stability. Both experimental researches both on the hydrodynamic pressure acted inside joints between the bedrock and the apron slab, and on forces at arch abutments in inverted arch cushion pool are carried out by using an advanced measurement and the imitation means to acquire the mechanism of the inverted arch pool to keep stability and its stability condition. | Ph.D.Candidate:Sun JianXi’an University of Technolgy, Xi’an 710048, ChinaSupervisor:Yu Changzhao (Tsinghua University, Beijing 100084, China)Li Yuzhu (Tsinghua University, Beijing 100084, China)Chen Changzhi (Tsinghua University, Beijing 100084, China)Members of Dissertation Defense Committee:Gao Jizhang (China Institute of Water Resources and Hydropower Research), ChairmanLi Guifen (China Institute of Water Resources and Hydropower Research)Cui Guangtao (Tianjing University)Wang Xingkui (Tsinghua University)Yu Changzhao (Tsinghua University)Li Yuzhu (Tsinghua University)Chen Changzhi (Tsinghua University) | 2003 | Journal of Hydrodynamics2003，15，1： | 39 |
| 2 | Variability of phytoplankton absorption in the northern South China Sea:influence of the size structure and pigment composition of algal populations显示文摘Data from three cruises conducted in the Zhujiang River (ZR), coastal waters of Guangdong (CWGD) and the northern South China Sea (NSCS) during 2003 and 2004 were examined for assessing the relative importance of pigment composition and packaging effect in modifying the specific absorption coefficients of phytoplankton. The three survey regions differ widely in their phytoplankton community with large cells dominating the ZR and CWGD waters and small cells dominating the NSCS region. Variations in the size structure and the accessory pigments have much effect on the chlorophyll a-specific absorption coefficient of phytoplankton. The size index accounted for about 42% and 33% of the variation of the specific absorption coefficient at 440 and 675 nm, respectively. Using the multiple regression analysis approach, pigment concentrations for each sample were calculated. The accessory pigments other than chlorophyll a contribute to absorption mainly in the blue-to-green region of the spectrum and their absorptions account for about 44%, 43% and 53% on the average of the total phytoplankton absorption at 440 nm for the ZR, CWGD and NSCS regions. Among the accessory pigments, the photosynthetic carotenoids (noted PSC) play a dominant role in the ZR and CWGD waters, while in the NSCS the nonphotosynthetic carotenoids (noted PPC) as well as PSC have important contributions. Because the variations of both the size structure and accessory pigments in algal populations contributed to the variability of the specific absorption coefficient in the study regions, these factors may be considered explicitly in future bio-optical algorithms to derive chlorophyll a concentration more accurately. | WANG Guifen CAO Wenxi XU Dazhi YANG Yuezhong | 2007 | Acta Oceanologica Sinica2007，26，2： | 9 |
| 3 | Chemical characteristics and source apportionment of PM_(2.5) in a petrochemical city: Implications for primary and secondary carbonaceous component显示文摘To study the pollution features and underlying mechanism of PM_(2.5) in Luoyang, a typical developing urban site in the central plain of China, 303 PM_(2.5) samples were collected from April 16 to December 29, 2015 to analyze the elements, water soluble inorganic ions, organic carbon and elemental carbon. The annual mean concentration of PM_(2.5) was 142.3 μg/m^(3), and 75% of the daily PM_(2.5) concentrations exceeded the 75 μg/m^(3). The secondary inorganic ions, organic matter and mineral dust were the most abundant species, accounting for 39.6%, 19.2% and 9.3% of the total mass concentration, respectively. But the major chemical components showed clear seasonal dependence. SO_(4)^(2-) was most abundant specie in spring and summer, which related to intensive photochemical reaction under high O_3 concentration. In contrast, the secondary organic carbon and ammonium while primary organic carbon and ammonium significantly contributed to haze formation in autumn and winter, respectively. This indicated that the collaboration effect of secondary inorganic aerosols and carbonaceous matters result in heavy haze in autumn and winter. Six main sources were identified by positive matrix factorization model: industrial emission, combustion sources, traffic emission, mineral dust, oil combustion and secondary sulfate, with the annual contribution of 24%, 20%, 24%, 4%, 5% and 23%, respectively. The potential source contribution function analysis pointed that the contribution of the local and short-range regional transportation had significant impact. This result highlighted that local primary carbonaceous and precursor of secondary carbonaceous mitigation would be key to reduce PM_(2.5) and O_3 during heavy haze episodes in winter and autumn. | Guangxuan Yan Puzhen Zhang Jie Yang Jingwen Zhang Guifen Zhu Zhiguo Cao Jing Fan Zirui Liu Yuesi Wang | 2021 | Journal of Environmental Sciences2021，33，5： | 6 |
| 4 | Molecular cloning, tissue expression and protein structure prediction of the porcine 3-hydroxy-3-methylglutaryl-coenzyme A reductase ( HMGR ) gene显示文摘 | Xiao Chen Xiaofeng Wang Zongjin Li Lujun Kong Guifen Liu Jinluan Fu Aiguo Wang | 2011 | Gene2011，，2： | 2 |
| 5 | On brain activity mapping: Insights and lessons from Brain Decoding Project to map memory patterns in the hippocampus显示文摘The BRAIN project recently announced by the president Obama is the reflection of unrelenting human quest for cracking the brain code, the patterns of neuronal activity that define who we are and what we are. While the Brain Activity Mapping proposal has rightly emphasized on the need to develop new technologies for measuring every spike from every neuron, it might be helpful to consider both the theoretical and experimental aspects that would accelerate our search for the organizing principles of the brain code. Here we share several insights and lessons from the similar proposal, namely, Brain Decoding Project that we initiated since 2007. We provide a specific example in our initial mapping of real-time memory traces from one part of the memory circuit, namely, the CA1 region of the mouse hippocampus. We show how innovative behavioral tasks and appropriate mathematical analyses of large datasets can play equally, if not more, important roles in uncovering the specific-to-general feature-coding cell assembly mechanism by which episodic memory, semantic knowledge, and imagination are generated and organized. Our own experiences suggest that the bottleneck of the Brain Project is not only at merely developing additional new technologies, but also the lack of efficient avenues to disseminate cutting edge platforms and decoding expertise to neuroscience community. Therefore, we propose that in order to harness unique insights and extensive knowledge from various investigators working in diverse neuroscience subfields, ranging from perception and emotion to memory and social behaviors, the BRAIN project should create a set of International and National Brain Decoding Centers at which cutting-edge recording technologies and expertise on analyzing large datasets analyses can be made readily available to the entire community of neuroscientists who can apply and schedule to perform cutting-edge research. | TSIEN Joe Z. LI Meng OSAN Remus CHEN GuiFen LIN LongNian WANG Phillip Lei FREY Sabine FREY Julietta ZHU DaJiang LIU TianMing ZHAO Fang KUANG Hui | 2013 | Science China(Life Sciences)2013，56，9： | 1 |
| 6 | Dehydrogenation and aromatization of methane under non-oxidizing conditions显示文摘 | Linsheng Wang Longxiang Tao Maosong Xie Guifen Xu Jiasheng Huang Yide Xu | 1993 | Catalysis Letters (-)1993，，1： | 1 |
| 7 | Energy Efficiency Maximization Strategy for Sink Node in SWIPT-Enabled Sensor-Cloud Based on Optimal Stopping Rules显示文摘Leveraging energy harvesting abilities in wireless network devices has emerged as an effective way to prolong the lifetime of energy constrained systems.The system gains are usually optimized by designing resource allocation algorithm appropriately.However,few works focus on the interaction that channel’s time-vary characters make the energy transfer inefficiently.To address this,we propose a novel system operation sequence for sensor-cloud system where the Sinks provide SWIPT for sensor nodes opportunistically during downlink phase and collect the data transmitted from sensor nodes in uplink phase.Then,the energy-efficiency maximization problem of the Sinks is presented by considering the time costs and energy consumption of channel detection.It is proved that the formulated problem is an optimal stopping process with optimal stopping rules.An optimal energy-efficiency(OEE)algorithm is designed to obtain the optimal stopping rules for SWIPT.Finally,the simulations are performed based on the OEE algorithm compared with the other two strategies to verify the effectiveness and gains in improving the system efficiency. | Zhe Wang Lina Ge Taoshen Li Guifen Zhang Min Wu | 2021 | China Communications2021，18，1： | 1 |
| 8 | Dehydrogenation and aromatization of methane under non-oxidizing conditions显示文摘 | Linsheng Wang Longxiang Tao Maosong Xie Guifen Xu Jiasheng Huang Yide Xu | 1993 | Catalysis Letters (-)1993，，1： | 1 |
| 9 | Satellite-observed variability of phytoplankton size classesassociated with a cold eddy in the South China Sea显示文摘 | LIN JUNFANG CAO WENXI WANG GUIFEN 2014 | 2014 | MarinePollution Bulletin2014，83，1： | 1 |
| 10 | Dehydrogenation and aromatization of methane under non-oxidizing conditions显示文摘 | Linsheng Wang Longxiang Tao Maosong Xie Guifen Xu Jiasheng Huang Yide Xu | 1993 | Catalysis Letters (-)1993，，1： | 1 |
| 11 | Vertical variations in the bio-optical properties of seawater in the northern South China Sea during summer 2008显示文摘Vertical variability in the bio-optical properties of seawater in the northern South China Sea(NSCS)including inherent optical properties(IOPs)and chlorophyll a concentration(Chl)were studied on the basis of in situ data collected in summer 2008 using an absorption/attenuation spectrophotometer.An empirical model was developed to estimate Chl profiles based on the absorption line height at long wavelengths,with a relative root mean square error of 37.03%.Bio-optical properties exhibited large horizontal and vertical spatial variability.As influenced by coastal upwelling and the Zhujiang River(Pearl River)discharge,both IOPs and Chl exhibited high values in the surface waters of the inner shelf,which tended to decrease with distance offshore.Subsurface maximum layers of IOPs and Chl were observed in the middle and outer shelf regions,along with significantly higher values of attenuation coefficients beneath this layer that rapidly increased towards the bottom.In the open ocean,both IOPs and Chl exhibited consistent variability,with the subsurface maximum layer typically located at34–84 m.Phytoplankton were found to be one of the major components in determining the vertical variability of bio-optical properties,with their vertical dynamics influenced by both physical forcing and light attenuation effects.The depth of the subsurface maximum layer was found to be closely related to the fluctuation of the oceanic thermocline and the depth of the euphotic zone,which also affected the total integrated biomass of the upper ocean.Typically high values of attenuation coefficients observed in the bottom waters of the continental shelf reflected the transport of particulate matter over the bottom boundary layer.Our results reveal large spatial differences in bio-optical profiles in response to complex marine ecodynamics in the NSCS.From the perspective of marine research,high-resolution optical measurements are clearly advantageous over conventional bottle sampling. | Guifen Wang Wen Zhou Zhantang Xu Wenlong Xu Yuezhong Yang Wenxi Cao | 2020 | Acta Oceanologica Sinica2020，39，4： | 1 |
| 12 | Application of spatial fuzzy clustering algorithm in precision fertilization显示文摘 | Chen Guifen Cao Liying Wang Guowei | 2007 | New Zealand Journal of Agricultural Research2007，50，： | 1 |
| 13 | Human serum amyloid A (SAA) protein changes in acute epilepsy patients显示文摘 | Guifen Li Fang Ren Jinhua Yao Mingying Wang Xianjun Feng Dong Liu | 2013 | International Journal of Neuroscience2013，，4： | 1 |
| 14 | Numerical simulation of sediment lifted by waves and transported by tidal currents显示文摘Numericalsimulationofsedimentliftedbywavesandtransportedbytidalcurrents￥CaoZudeandWangGuifen(TianjinResearchInstituteofWaterT... | Cao Zude and Wang Guifen(Tianjin Research Institute of Water Transport Engineering, Tanggu 300456, Tianjin, China) | 1994 | Acta Oceanologica Sinica1994，13，3： | 1 |
| 15 | Application of spatial fuzzy clustering algorithm in precision fertilization显示文摘 | CHEN GUIFEN CAO LIYING WANG GUOWEI | 2007 | New Zealand Journal of Agricultural Research2007，50，： | 1 |
| 16 | Phase transition behaviour and eleetromecbanical prop- erties of (Na1/2 Bi1/2 ) TiO3 KNbO3 lead-free piezoelectric ceramics显示文摘 | Fan Guifen Lu Wenzhong Wang Xiaohong | 2008 | Journal of Physics : D(Applied Physics)2008，41，03： | 1 |
| 17 | Eleetrochemiluminescence immunosensor based on CdSe nanocom- posites 显示文摘 | JIE Guifen ZHANG Jingjing WANG Danchen | 2008 | Anal Chem2008，80，11： | 1 |
| 18 | Variation of Particulate Organic Carbon and its Relationship with Bio-optical Properties During a Phytoplankton Bloom in the Pearl River Estuary显示文摘 | Wang Guifen Zhou Wen Cao Wenxi | 2011 | Marine Pollution Bulletin2011，62，： | 1 |
| 19 | Dicofol application resulted in high DDTs residue in cotton fields from northern Jiangsu province, China显示文摘 | Xinglun Yang Shisheng Wang Yongrong Bian Feng Chen Guifen Yu Chenggang Gu Xin Jiang | 2007 | Journal of Hazardous Materials2007，，1： | 1 |
| 20 | Survey and Evaluation of Heavy Metal Pollution in Paddy Soil in West Guangxi显示文摘This paper aims to understand the current situation of heavy metal pollution in paddy soil in West Guangxi,to provide a reference for heavy metal pollution control. The content of Cd,Pb and As of 50 soil samples of cultivation layer( 0- 20 cm),taken from main rice producing areas in West Guangxi,is determined. The environment quality of soil is assessed with the single factor index and the potential ecological risk of paddy soil is evaluated with the potential ecological risk index of Hakanson. The results show that the mean content of Cd,Pb,and As in paddy soil samples is 0. 941,26. 46 and 10. 16 mg / kg,respectively. The Cd content of 54. 0% soil samples and the As content of 2. 0% soil samples are higher than the standard II National Soil Environment Quality,and Cd in paddy soil has high potential ecological risk. Heavy metal pollution in paddy soil in West Guangxi is mainly Cd pollution. | Yuyi HUANG Guifen CHEN Liumei XIONG Yuning WANG Kaifu YE Lan ZHANG Qizhan TANG Jin WANG | 2015 | Asian Agricultural Research2015，7，7： | 1 |
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