|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Petroleum hydrocarbons and their effects on fishery species in the Bohai Sea, North China显示文摘Systematic studies on the changes in concentrations of petroleum hydrocarbons (PHs) and their effects on fishery species in the Bohai Sea during 1974-2004 are presented. Changes in PHs concentrations were closely related to Yellow River runoff. Concentrations of PHs accumulated in fish and shrimp increased by about 0.712 mg/kg dry weight when trophic level of fish and shrimps increased by 1. Attention should also be paid to the high PHs concentrations in mollusks along the coastal waters of the Bohai Sea. Average concentration of PHs in the adjacent coastal waters of Tianjin City during 1996-2005 decreased the population growth rates of fish, crustaceans and mollusks in the Bohai Sea by 2.58%, 6.59% and 2.33%, respectively. Therefore, PHs have significantly contributed to the decline in fisheries in the Bohai Sea, and they must be reduced to realize the sustainable fisheries. | Sisi Xu Jinming Song Huamao Yuan Xuegang Li Ning Li Liqin Duan Yu Yu | 2011 | Journal of Environmental Sciences2011，23，4： | 15 |
| 2 | Organic carbon source and burial during the past one hundred years in Jiaozhou Bay,North China显示文摘器官的碳(OC ) ,总氮(TN ) ,和在核心沉积的 210Pb 被测量确定器官的碳和属曾被地壳动力搬、本土的贡献的相对重要性的埋葬在在 Jiaozhou 海湾的过去的 100 年期间,诺思中国。核心沉积用 210Pb 年表被标明日期,它是最有希望的方法因为在一时间的沉积率的评价 100-150 年可伸缩。过去的 100 年里的器官的碳的埋葬流动的变化能被划分成下列三个阶段:( 1 )以前相对稳定1980年代;( 2 )在1990年代从1980年代很快增加到一座山峰,并且( 3 )从1990年代减少到礼品。变化与倒进海湾的稳固的废物和污水的数量一致。OC : TN 比率被用来在 Jiaozhou 海湾沉积评估器官的碳的来源。在内部海湾和海湾嘴,器官的碳是从陆上的来源的主要贡献者,而在外部海湾从陆上的来源仅仅关于器官的碳的一半被贡献。在内部海湾,器官的碳的陆上的来源在 2000 在 1990 ~ 93% 前随 69%-77% 的范围的增加显示出一个稳定的变化,然后因为减少,在陆上的输入从 2000 减少了。在海湾嘴,从土地的器官的碳的百分比在 1994 与 94% 到达了最高的价值。在外部海湾,沉积来源维持了为过去的 100 年稳定。 | LI Xuegang YUAN Huamao LI Ning SONG Jinming | 2008 | Journal of Environmental Sciences2008，20，5： | 15 |
| 3 | Carbon sinks/sources in the Yellow and East China Seas Air-sea interface exchange, dissolution in seawater, and burial in sediments显示文摘The sinks/sources of carbon in the Yellow Sea(YS) and East China Sea(ECS), which are important continental shelf seas in China, could exert a great influence on coastal ecosystem dynamics and the regional climate change process. The CO_2 exchange process across the seawater-air interface, dissolved and particulate carbon in seawater, and carbon burial in sediments were studied to understand the sinks/sources of carbon in the continental shelf seas of China. The YS and the ECS generally have different patterns of seasonal air-sea CO_2 exchange. In the YS, regions west of 124°E can absorb CO_2 from the atmosphere during spring and winter, and release CO_2 to the atmosphere during summer and autumn. The entire YS is considered as a CO_2 source throughout the year with respect to the atmosphere, but there are still uncertainties regarding the exact air-sea CO_2 exchange flux. Surface temperature and phytoplankton production were the key controlling factors of the air-sea CO_2 exchange flux in the offshore region and nearshore region of the YS, respectively. The ECS can absorb CO_2 during spring, summer, and winter and release CO_2 to the atmosphere during autumn. The annual average exchange rate in the ECS was-4.2±3.2 mmol m^(-2) d^(-1) and it served as an obvious sink for atmospheric CO_2 with an air-sea exchange flux of 13.7×10~6 t. The controlling factors of the air-sea CO_2 exchange in the ECS varied significantly seasonally. Storage of dissolved inorganic carbon(DIC) and dissolved organic carbon(DOC) in the YS and the ECS were 425×10~6 t and 1364×10~6 t, and 28.2×10~6 t and 54.1×10~6 t,respectively. Long-term observation showed that the DOC content in the YS had a decreasing trend, indicating that the 'practical carbon sink' in the YS was decreasing. The total amount of particulate organic carbon(POC) stored in the YS and ECS was10.6×10~6 t, which was comparable to the air-sea CO_2 flux in these two continental shelf seas. The amounts of carbon sequestered by phytoplankton in the YS and the ECS were 60.42×10~6 t and 153.41×10~6 t, respectively. Artificial breeding of macroalgae could effectively enhance blue carbon sequestration, which could fix 0.36×10~6–0.45×10~6 t of carbon annually. Organic carbon(OC) buried in the sediments of the YS was estimated to be 4.75×10~6 t, and OC of marine origin was 3.03×10~6 t, accounting for5.0% of the TOC fixed by phytoplankton primary production. In the ECS, the corresponding depositional flux of OC in the sediment was estimated to be 7.4×10~6 t yr^(-1), and the marine-origin OC was 5.5×10~6 t, accounting for 5.4% of the phytoplankton primary production. Due to the relatively high average depositional flux of OC in the sediment, the YS and ECS have considerable potential to store a vast amount of 'blue carbon.' | Jinming SONG Baoxiao QU Xuegang LI Huamao YUAN Ning LI Liqin DUAN | 2018 | Science China Earth Sciences2018，61，11： | 11 |
| 4 | Environmental significance of biogenic elements in surface sediments of the Changjiang Estuary and its adjacent areas显示文摘Biogenic elements and six phosphorus(P) fractions in surface sediments from the Changjiang Estuary and adjacent waters were determined to investigate the governing factors of these elements, and further to discuss their potential uses as paleo-environment proxies and risks of P release from sediment. Total organic carbon(TOC) and leachable organic P(Lea-OP) showed high concentrations in the estuary, Zhejiang coast and ofshore upwelling area. They came from both the Changjiang River and marine biological input.Biogenic silicon(BSi) exhibited a high concentration band between 123 and 124°E. BSi mainly came from diatom production and its concentration in the inshore area was diluted by river sediment. Total nitrogen(TN) was primarily of marine biogenic origin. Seaward decreasing trends of Fe-bound P and Al-bound P revealed their terrestrial origins. Influenced by old Huanghe sediment delivered by the Jiangsu coastal current, the maximum concentration of detrital P(Det-P) was observed in the area north of the estuary. Similar high concentrations of carbonate fluorapatite(CFA-P) and CaCO3 in the southern study area suggested marine calcium-organism sources of CFA-P. TOC, TN and non-apatite P were enriched in fine sediment, and Det-P partially exhibited coarse-grain enrichment, but BSi had no correlation with sediment grain size. Diferent sources and governing factors made biogenic elements and P species have distinct potential uses in indicating environmental conditions. Transferable P accounted for 14%-46% of total P. In an aerobic environment,there was low risk of P release from sediment, attributed to excess Fe oxides in sediments. | Yu Yu Jinming Song Xuegang Li Huamao Yuan Ning Li Liqin Duan | 2013 | Journal of Environmental Sciences2013，25，11： | 9 |
| 5 | Removal of polycyclic aromatic hydrocarbons from different soil fractions by persulfate oxidation显示文摘Removal of polycyclic aromatic hydrocarbons(PAHs) from different soil fractions of contaminated soil was investigated by using activated persulfate oxidation remediation in our research. The results showed that the light fraction, which accounted for only 10% of the soil, contained 30% of the PAHs at a concentration of 4352 mg/kg. The heavy fraction contained more high-molecular-weight PAHs, and the total PAH concentration was 625 mg/kg. After being oxidized, the removal rate of PAHs was 39% in the light fraction and nearly 90% in the heavy fraction. Among the different fractions of the heavy fraction,humic acid contained the highest concentration of PAHs, and consequently, the highest removal efficiency of PAHs was also in humic acid. Compared with the light fraction, the heavy fraction has more aromatic compounds and those compounds were broken down during the oxidation process, which may be the removal mechanism involved in the oxidation of high-ring PAHs. Similarly, the enhancement of C= C bonds after oxidation can also explain the poor removal of high-ring PAHs in the light fraction. These results imply that different fractions of soil vary in composition and structure, leading to differences in the distribution and oxidation efficiencies of PAHs. | Xiaoyong Liao Qiongzhi Liu You Li Xuegang Gong Hongying Cao | 2019 | Journal of Environmental Sciences2019，31，4： | 8 |
| 6 | Geochemical records of phosphorus in Jiaozhou Bay sediments—Impli-cations for environmental changes in recent hundred years显示文摘Phosphorus is a key element and plays an important role in global biogeochemical cycles. The evolution of sedimentary environment is also influenced by phosphorus concentrations and fractions as well as phosphate sorption characteristics of the marine sediments. The geochemical characteristics of phosphorus and their environmental records were presented in Jiaozhou Bay sediments. Profiles of different forms of phosphorus were measured as well as the roles and vertical distributions of phosphorus forms in response to sedimentary environment changes were investigated. The results showed that inorganic phosphorus (IP) was the major fraction of total phosphorus (TP); phosphorus which is bound to calcium, iron and occluded phosphorus, as well as the exchangeable phosphorus were the main forms of IP, especially calcium-phosphorus, including detrital carbonate-bound phosphorus (Det-P) and authigenic apatite-bound phosphorus (ACa-P), are the uppermost constituent of IP in Jiaozhou Bay sediments. Moreover, the lead-210 chronology technology was employed to estimate how much phosphorus was buried ultimately in sediments. And the research showed that the impacts of human activities have increased remarkably in recent years especially between the 1980s and 2000. According to research, the development of Jiaozhou Bay environment in the past hundred years can be divided into three stages: (1) before the 1980s characterized by the relatively low sedimentation rate, weak land-derived phosphorus inputs and low anthropogenic impacts; (2) from the 1980s to around 2000, accelerating in the 1990s, during which high sedimentation rates, high phosphorus abundance and burial fluxes due to the severe human activities impacted on the whole environmental system; (3) after 2000, the period of the improvement of environment, the whole system has been improved including the decreasing sedimentation rates, concentration and the burial fluxes of phosphorus. | DAI Jicui SONG Jinming LI Xuegang YUAN Huamao ZHENG Guoxia LI Ning | 2007 | Acta Oceanologica Sinica2007，26，4： | 8 |
| 7 | Dissolved barium as a tracer of Kuroshio incursion in the Kuroshio region east of Taiwan Island and the adjacent East China Sea显示文摘From May to June 2014, the geochemical characteristics of dissolved barium(Ba) in sea water and its influx from the Kuroshio into the East China Sea(ECS) were studied by investigation of the Kuroshio mainstream east of Taiwan Island and the adjacent ECS. This allowed for the scope and extent of the Kuroshio incursion to be quantitatively described for the first time by using Ba as a tracer. The concentration of Ba in the Kuroshio mainstream increased gradually downward from the surface in the range 4.91–19.2 μg L.1. In the surface layer of the ECS, the Ba concentration was highest in coastal water and gradually decreased seaward, while it was higher in coastal and offshore water but lowest in middle shelf for bottom layer. The influx of Ba from Kuroshio into the ECS during May to October was calculated to be 2.19×108 kg by a water exchange model, in which the subsurface layer had the largest portion. The distribution of Ba indicated that Kuroshio upwelled in the sea area northeast of Taiwan Island. The north-flowing water in the Taiwan Strait restrained the incursion of Kuroshio surface water onto the ECS shelf, while Kuroshio subsurface water gradually affected the bottom of the ECS from outside. The results of end member calculation, using Ba as a parameter, showed that the Kuroshio surface water had little impact on the ECS, while the Kuroshio subsurface water formed an intrusion current by climbing northwest along the bottom of the middle shelf from the sea area northeast of Taiwan Island into the Qiantang Estuary, of which the volume of Kuroshio water was nearly 65%. Kuroshio water was the predominant part of the water on the outer shelf bottom and its proportion in areas deeper than the 100 m isobath could reach more than 95%. In the DH9 section(north of Taiwan Island), Kuroshio subsurface water intruded westward along the bottom from the shelf edge and then rose upward(in lower proportion). Kuroshio water accounted for 95% of the ocean volume could reach as far as 122°E. Ba was able to provide detailed tracing of the Kuroshio incursion into the ECS owing to its geochemical characteristics and became an effective tracer for revealing quantitative interactions between the Kuroshio and the ECS. | LIU Wei SONG JinMing YUAN HuaMao LI Ning LI XueGang DUAN LiQin | 2017 | Science China Earth Sciences2017，60，7： | 8 |
| 8 | A draft sequence of the rice (Oryza sativa ssp. indica) genome显示文摘The sequence of the rice genome holds fundamental information for its biology, including physiology, genetics, development, and evolution, as well as information on many beneficial phenotypes of economic significance. Using a 'whole genome shotgun' approach, we have pro-duced a draft rice genome sequence of Oryza sativa ssp. in-dica, the major crop rice subspecies in China and many other regions of Asia. The draft genome sequence is constructed from over 4.3 million successful sequencing traces with an accumulative total length of 2214.9 Mb. The initial assembly of the non-redundant sequences reached 409.76 Mb in length, based on 3.30 million successful sequencing traces with a total length of 1797.4 Mb from an indica variant cultivar 93-11, giving an estimated coverage of 95.29% of the rice genome with an average base accuracy of higher than 99%. The coverage of the draft sequence, the randomness of the sequence distribution, and the consistency of BIG-ASSEM-BLER, a custom-designed software package | YU Jun, HU Songnian, WANG Jun,LI Songgang WONG Ka-Shu Gane, LIU Bin,DENG Yajun, DAI Li, ZHOU Yan,ZHANG Xiuqing, CAO Mengliang, LIU Jing,SUN Jiandong , TANG Jiabin, CHEN Yanjiong,HUANG Xiaobing, LIN Wei, YE Chen, TONG Wei,CONG Lijuan, GENG Jianing, HAN Yujun, LI Lin,LI Wei, HU Guangqiang, HUANG Xiangang,LI Wenjie, LI Jian, LIU Zhanwei, LI Long,LIU Jianping, Ql Qiuhui, LIU Jinsong, LI Li,WANG Xuegang, LU Hong, WU Tingling,ZHU Miao, Nl Peixiang, HAN Hua, DONG Wei,REN Xiaoyu, FENG Xiaoli, GUI Peng,LI Xianran, WANG Hao, XU Xin, ZHAI Wenxue,XU Zhao, ZHANG Jinsong, HE Sijie,ZHANG Jianguo, XU Jichen, ZHANG Kunlin,ZHENG Xianwu, DONG Jianhai, ZENG Wanyong,TAO Lin, CHEN Xuewei, HE Jun, LIU Daofeng,TIAN Wei, TIAN Chaoguang, XIA Hongai,LI Gang, GAO Hui, LI Ping, CHEN Wei ,WANG Xudong, ZHANG Yong, HU Jianfei,WANG Jing, LIU Song, YANG Jian,ZHANG Guangyu, XIONG Yuqing, LI Zhijie,MAO Long, ZHOU Chengshu, ZHU Zhen,CHEN Runsheng, HAO Bailin,ZHENG Weimou, CHEN Shouyi, QUO Wei,LI Guojie, LIU Siqi, HUANG Guyang,TAO Ming, WANG Jian, ZHU Lihuang,YUAN Longping& YANG HuanmingBeijing Genomics Institute/Center of Genomics & Bioinformatics, Chinese Academy of Sciences, Beijing 101300, China Hangzhou Genomics Institute/Institute of Bioinformatics of Zhejiang University/Key Laboratory of Bioinformatics of Zhejiang Province, Hangzhou 310007, China Institute of Genetics, Chinese Academy of Sciences, Beijing 100101, China National Hybrid Rice R & D Center, Changsha 410125, China Laboratory of Bioinformatics, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China College of Life Sciences, Peking University, Beijing 100871, China Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 1Q0080, China Digital China Ltd., Beijing 100080, China Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100080, China Medical College, Xi’an Jiaotong University, Xi’an 710061, ChinaThese authors contributed equally to this work.Corresponding author.Corresponden | 2001 | Chinese Science Bulletin2001，46，23： | 6 |
| 9 | On direct optimization in mode space for robust supergain beamforming of circular array mounted on a cylinder显示文摘A direct robust supergain method in mode space for the circular array mounted on an infinite rigid cylinder was proposed,and then it was also applied to the circular array mounted on a finite rigid cylinder which is more practical.According to the concept of phase modes,the beam pattern is expanded into a series of eigen-beams multiplying by modal coefficients. The modal noise cross spectral matrix is calculated from sound scattering theory.In the original modal robust supergain method,the coefficient vector in mode space is transformed indirectly from the weighting vector in sensor space.The method presented here gives the most suitable modal coefficient vector directly under the related constraint conditions based on the second-order cone programming.The results of simulation show that the direct modal robust supergain method can not only improve robustness using the white noise gain constraint, but also change the mode orders to provide compromise between array gain and robustness in low frequencies.Beam performance measures such as sidelobe level can be optimized as well as array gain,so this method can give more effective schemes for designing practical robust supergain beamformers. | WANG Yong YANG Yixin LI Xuegang | 2012 | Chinese Journal of Acoustics2012，31，4： | 6 |
| 10 | One century record of contamination by polycyclic aromatic hydrocarbons and polychlorinated biphenyls in core sediments from the southern Yellow Sea显示文摘Sixteen polycyclic aromatic hydrocarbons (PAHs) and 28 polychlorinated biphenyls (PCBs) were measured at a 2-cm interval in a core sample from the middle of the southern Yellow Sea for elucidating their historical variations in inflow and sources. The chronology was obtained using the 210Pb method. PAHs concentrations decreased generally with depth and two climax values occurred in 14–16 cm and 20–22 cm layers, demonstrating that the production and usage of PAHs might reach peaks in the periods of 1956–1962 and 1938–1944. The booming economy and the navy battles of the Second World War might explain why the higher levels were detected in the two layers. The result of principal component analysis (PCA) revealed that PAHs were primarily owing to the combustion product. Down-cored variation of PCB concentrations was complex. Higher concentrations besides the two peaks being the same as PAHs were detected from 4 to 8 cm, depositing from 1980 to 1992, which probably resulted from the disposal of the out-dated PCB-containing equipment. The average Cl percentage of PCBs detected was similar to that of the mixture of Aroclor 1254 and 1242, suggesting they might origin from the dielectrical and heat-transfer fluid. The total organic carbon (TOC) content played a prevalent role in the adsorption of high molecular weight PAHs ( 4-ring), while no obvious relationship among total PCBs, the concentration of congeners, and TOC was found. | ZHANG Peng SONG Jinming FANG Jie LIU Zhigang LI Xuegang YUAN Huamao | 2009 | Journal of Environmental Sciences2009，21，8： | 6 |
| 11 | Spatial distributions and seasonal variations of particulate phosphorus in the Jiaozhou Bay in North China显示文摘Based on the measurements of particulate phosphorus(PP) in the Jiaozhou Bay from May 2003 to April 2004,the spatial distribution,seasonal variation and biogeochemical characteristics of PP were investigated to understand the fates and roles of phosphorus in the Jiaozhou Bay ecosystem.The concentration of the total PP ranged from 0.07 to 2.09 μmol/dm3.The concentration of POP was from 0.01 to 1.83 μmol/dm3,with an average of 0.32 μmol/dm3,which accounted for 49.6% in total PP.The concentration of PIP was from 0.01 to 1.49 μmol/dm3,with an average of 0.33 μmol/dm3,which accounted for 50.4% in total PP.In general,the concentrations of PP in surface water show obvious seasonal variations in the Jiaozhou Bay.POP was the highest in spring,which derived from the accumulation of phyto-detritus and was the lowest in autumn,which was decomposed into seawaters to participate the recycle of phosphorus.PIP was the highest in spring and summer and was the lowest in autumn and winter.PIP was mainly influenced by river input in the inner bay but POP derived from autochthonous source in the outer bay.Overall,the concentrations of PP in the inner bay were higher than those in mouth and the outer bay.In the inner bay,the concentrations of PP with the area near the shore were higher than those in the center of the bay.Totally PP showed the decreasing trend with depth especially in spring and winter.The high value of PP emerged in 20 and 10 m corresponding to summer and autumn,respectively.The changes of POP showed hysteretic effect compared with the changes of Chl a in the investigated year.However,according to the change of Chl a,the second high value of POP which should be emerged in October was missing due to the remineralization of POP and participation in the recycle of phosphorus,which lead to the high concentration of orthophosphate in seawaters. | YUAN Huamao SONG Jinming LI Ning LI Xuegang ZHANG Ying XU Sisi | 2009 | Acta Oceanologica Sinica2009，28，1： | 5 |
| 12 | The sources and composition of organic matter in sediments of the Jiaozhou Bay:implications for environmental changes on a centennial time scale显示文摘The Jiaozhou Bay is characterized by heavy eutrophication that is associated with intensive anthropogenic activities. Four core sediments from the Jiaozhou Bay are analyzed using bulk technologies, including sedimentary total organic carbon(TOC), total nitrogen(TN), the stable carbon(δ^(13)C) and nitrogen(δ^(15) N) isotopic composition to obtain the comprehensive understanding of the source and composition of sedimentary organic matter and further shed light on the environmental changes of the Jiaozhou Bay on a centennial time scale.Results suggest that the TOC and TN concentrations increase in the upper core, having indicated a probable eutrophication process since the 1920 s in the inner bay and the 2000 s in the bay mouth. The TOC and TN concentrations outside the bay have also changed since 1916 owing to the variation of terrigenous input.Considering TOC/TN ratio, δ^(13) C and δ^(15) N, it can be concluded there is a mixture of terrigenous and marine organic matter sources in the study area. A simple two end-member(terrigenous and marine) mixing model usingδ^(13) C indicats that 45%–79% of TOC in the Jiaozhou Bay is from the marine source. The environmental changes of the Jiaozhou Bay are recorded by geochemical proxies, which are influenced by the intensive anthropogenic activities(e.g., extensive use of fertilizers, and discharge of sewage) and climate changes(e.g., rainfall). | KANG Xuming SONG Jinming YUAN Huamao LI Xuegang LI Ning DUAN Liqin | 2017 | Acta Oceanologica Sinica2017，36，11： | 5 |
| 13 | A survey on online feature selection with streaming features显示文摘 | Xuegang HU Peng ZHOU Peipei LI Jing WANG Xindong WU | 2018 | Frontiers of Computer Science2018，12，3： | 4 |
| 14 | FORCED WAVE PROPAGATION IN VISCOELASTIC CABLE WITH SMALL SAG显示文摘Based on the linear viscoelastic differential constitutive law and cable structural model, the coupled longitudinal-transverse waves that propagate along a viscoelastic cable with small curvature is investigated. A mathematical model is presented that describes the three-dimensional nonlinear response of a viscoelastic cable. An asymptotic form of this model is obtained for the linear response of cables having small equihbrium curvature. The spectral relation governing the propagating waves is derived using transform methods. The spectral relation is employed in deriving a Green's function that is then used to construct solutions for in-plane response under distributed harmonic excitation. Analysis of forced response reveals the existence of two types of periodic waves that propagate through the cable, one characterizing extension-comprehensive deformation and the other characteristic transverse deformation. | Li Yinghui Jian Kailin~1 Gao Qing Yin Xuegang~1 (Department of Applied Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China) (1 State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China) | 2001 | Acta Mechanica Solida Sinica2001，14，2： | 4 |
| 15 | Modified Shenlingbaizhu decoction reduces intestinal adenoma formation in adenomatous polyposis coli multiple intestinal neoplasia mice by suppression of hypoxia-inducible factor 1α-induced CD4+CD25+forkhead box P3 regulatory T cells显示文摘OBJECTIVE: To test the hypothesis that modified Shenlingbaizhu decoction(MSD) attenuates the formation of intestinal adenomas by regulating activation of CD4+CD25+ forkhead box P3(Fox P3) regulatory T cells(Tregs) by downregulation of hypoxia-inducible factor 1α(HIF-1α).METHODS: Chemical fingerprints of ginsenoside Rb1, ginsenoside Rc, paeoniflorin, and dioscin in standard extractions were used as material bases of MSD. Adenomatous polyposis coli multiple intestinal neoplasia(ApcMin/+) mice, which harbor a mutation in adenomatous polyposis coli, were used to host intestinal adenomas. Peripheral blood and spleen Tregs were analyzed by flow cytometry. Protein expression was analyzed by immunohistochemistry and Western blotting.RESULTS: The number and size of intestinal adenomas were significantly reduced by MSD treatment.Mucosal thickening and the spleen size were also substantially decreased by MSD. The carcinogenesis process in ApcMin/+mice resembled that of human colorectal cancer. Molecular markers of neoplasms, such as β-catenin, cyclooxygenase-2, proliferating cell nuclear antigen, and p53, were substan-tially ameliorated by MSD treatment. Moreover,MSD downregulated peripheral and spleen CD4 +CD25+Fox P3+ Tregs and reduced in situ expression of CD4, CD25, and Fox P3 in intestinal adenomas.MSD also suppressed HIF-1α expression in the intestinal adenomas, and HIF-1α inhibition decreased expression of Fox P3 in Jurkat T cells under hypoxic conditions.CONCLUSION: MSD is a valid prescription to control the formation of intestinal adenomas in ApcMin/+mice. It exerts anti-cancer effects partially through suppression of HIF-1α that induced activation of CD4+CD25+Fox P3+ Tregs in vivo and in vitro. | Xu Wenjuan Han Qinrui Liang Shuntian Li Lu Shao Meng Yao Xueqing Sun Xuegang | 2018 | Journal of Traditional Chinese Medicine2018，38，1： | 3 |
| 16 | Connected Vehicle-Based Traffic Signal Coordination显示文摘This study presents a connected vehicles(CVs)-based traffic signal optimization framework for a coordinated arterial corridor.The signal optimization and coordination problem are first formulated in a centralized scheme as a mixed-integer nonlinear program(MINLP).The optimal phase durations and offsets are solved together by minimizing fuel consumption and travel time considering an individual vehicle’s trajectories.Due to the complexity of the model,we decompose the problem into two levels:an intersection level to optimize phase durations using dynamic programming(DP),and a corridor level to optimize the offsets of all intersections.In order to solve the two-level model,a prediction-based solution technique is developed.The proposed models are tested using traffic simulation under various scenarios.Compared with the traditional actuated signal timing and coordination plan,the signal timing plans generated by solving the MINLP and the two-level model can reasonably improve the signal control performance.When considering varies vehicle types under high demand levels,the proposed two-level model reduced the total system cost by 3.8%comparing to baseline actuated plan.MINLP reduced the system cost by 5.9%.It also suggested that coordination scheme was beneficial to corridors with relatively high demand levels.For intersections with major and minor street,coordination conducted for major street had little impacts on the vehicles at the minor street. | Wan Li Xuegang Ban | 2020 | Engineering2020，6，12： | 3 |
| 17 | NONLINEAR VIBRATION ANALYSIS OF VISCOELASTIC CABLE WITH SMALL SAG显示文摘Both the inplane and out-of-plane transverse vibrations of a viscoelastic cable subjected to aninitial stress distributing uniform on the cross section are studied.The constitution of the cable material is as-sumed to be of the hereditary integral type.The partial differential-integral equations of motion are derivedfirst.Then by applying Galerkin’s method,the governing equations are reduced to a set of second-order non-linear differential-integral equations which are solved by finite difference numerical integration procedures.Finally,the effects of the viscosity parameter and the elaslic parameter on the transient amplitudes of the firstmode are investigated by numerical simulation. | Li Yinghui Jian Kailin Gao Qing Yin Xuegang | 2001 | Acta Mechanica Solida Sinica2001，14，4： | 3 |
| 18 | Impact of Kuroshio on the dissolved oxygen in the East China Sea region显示文摘A marine survey was conducted from 18 May to 13 June 2014 in the East China Sea (ECS) and its adjacent Kuroshio Current to examine the spatial distribution and biogeochemical characteristics of dissolved oxygen (DO) in spring. Waters were sampled at 10?25 m intervals within 100 m depth, and at 25?500 m beyond 100 m. The depth, temperature, salinity, and density (sigma- t ) were measured in situ with a conductivity-temperature-depth (CTD) sensor. DO concentrations were determined on board using traditional Winkler titration method. The results show that in the Kuroshio Current, DO content was the highest in the euphotic layer, then decreased sharply with depth to about 1 000 m, and increased with depth gradually thereafter. While in the ECS continental shelf area, DO content had high values in the coastal surface water and low values in the near-bottom water. In addition, a low-DO zone off the Changjiang (Yangtze) River estuary was found in spring 2014, and it was formed under the combined influence of many factors, including water stratification, high primary productivity in the euphotic layers, high accumulation/ sedimentation of organic matter below the euphotic layers, and mixing/transport of oceanic current waters on the shelf. Most notable among these is the Kuroshio intruded water, an oceanic current water which carried rich dissolved oxygen onto the continental shelf and alleviated the oxygen deficit phenomenon in the ECS, could impact the position, range, and intensity, thus the formation/destruction of the ECS Hypoxia Zone. | ZUO Jiulong SONG Jinming YUAN Huamao LI Xuegang LI Ning DUAN Liqin | 2019 | Journal of Oceanology and Limnology2019，37，2： | 3 |
| 19 | Spatial and temporal variations in pH and total alkalinity at the beginning of the rainy season in the Changjiang Estuary, China显示文摘The results of field observation carried out in May 2003 were used to examine pH and total alkalinity behaviors in the Changjiang Estuary. It was showed that pH and total alkalinity took on clear spatial variations in values with the minima in the low salinity region. Like salinity, transect distributions of pH and total alkalinity (TA) in a downriver direction had a sharp gradient each. These gradients appeared in such a sequence that the TA gradient was earlier than salinity and pH gradients, and the salinity gradient was earlier than the pH gradient. These distribution characteristics seemed to be strongly influenced by the mixing process of freshwater and seawater, for both pH and total alkalinity had significant linear relationships with salinity and temperature. For pH, phytoplankton activities also had a significant impact upon its spatial distribution. During a period of 48 h, pH and total alkalinity changed within wide ranges for every layer of the two anchor stations, namely, Stas 13 and 20, which were located at the mixed water mass and seawater mass, respectively. For both Stas 13 and 20, pH and TA fluctuation of every layer could be very wide during a 4 h period. As a whole, the data of the two anchor stations showed that neither variations in salinity and temperature nor phytoplankton activities were the main factors strongly influencing the total alkalinity temporal variability on a small time scale. The data of Sta. 20 implied that both salinity variation and phytoplankton activities had a significant influence on pH temporal variability, but the same conclusion could not be drawn from the data of Sta. 13. | GAO Xuelu SONG Jinming LI Xuegang YUAN Huamao LI Ning | 2005 | Acta Oceanologica Sinica2005，24，5： | 3 |
| 20 | Distribution and chemical speciation of dissolved inorganic arsenic in the Yellow Sea and East China Sea显示文摘Distribution and chemical speciation of dissolved inorganic arsenic were examined in Yellow Sea and East China Sea. Results demonstrated that:(1) both As(III) and As(V) were detected, with As(V) dominated at 40% stations of surface water and 51% stations of bottom water;(2) influenced by the exchange of fresh and sea water, the type of surface sediment and the transport of various water masses, large values in surface water were observed along the coastal region and in the same latitude of Changjiang River Estuary and Hangzhou Bay, and in bottom water found in the southern area where the Taiwan Warm Current and Kuroshio Current influenced;(3) As(III) behaved non-conservatively in Changjiang River Estuary. Man-derived inputs cause substantial positive deviation from the theoretical dilution. The negative correlation of As(V) to salinity in surface water suggested that it behaved conservatively during the transportation along Changjiang River Estuary. While, the occurrence of As(V) up to the linear fit in bottom water indicated the eventual transfer from dissolved phase to particulate phase, which was impossible to be determined without the knowledge of arsenic level and speciation in suspended particulate matter. Further study is needed on the arsenic source/sink relationships based on the distribution profiles. | WU Bin SONG Jinming LI Xuegang | 2015 | Acta Oceanologica Sinica2015，34，6： | 3 |
您所在的机构暂未开通此部分的功能，请联系管理员