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| 1 | GPS short-delay multipath estimation and mitigation based on least square method显示文摘The GPS multipath signal model is presented,which indicates that the coherent DLL outputs in multipath environment are the convolution between the ideal DLL outputs and the channel responses.So the channel responses can be estimated by a least square method using the observed curve of the DLL discriminator.In terms of the estimated multipath channels,two multipath mitigation methods are discussed,which are equalization filtering and multipath subtracting,respectively.It is shown,by computer simulation,that the least square method has a good performance in channels estimation and the multipath errors can be mitigated almost completely by either of the methods.However,the multipath subtracting method has relative small remnant errors than equalization filtering. | Zhang Shengkang~(1,2),Wang Hongbo~(1,2),Yang Jun~(1,2) & He Leiming~(1,2) 1.Beijing Inst.of Radio Metrology and Measurement,Beijing 100854,P.R.China 2.National Key Laboratory of Metrology and Calibration Technology,Beijing 100854,P.R.China | 2009 | Journal of Systems Engineering and Electronics2009，20，5： | 6 |
| 2 | A nitrogen and phosphorus dynamic model of mesocosm pelagic ecosystem in the Jiaozhou Bay in China显示文摘A nitrogen and phosphorus dynamic model of mesocosm pelagic ecosystem was established according to the summary and synthesis of the models available,in which seven state variables (DIN,PO4-P,DON,DOP,phytoplankton,zooplankton and detritus) were included. Logically it had five modules-phytoplankton,zooplankton,dissolved inorganic nutrients,dissolved organic nutrients and detritus. The results showed that this model could simulate the variations of DIN,PO4-P,DON,DOP,POC and phytoplankton biomass in pelagic ecosystem in mesocosm properly,based on the site experiment data in the Jiaozhou Bay in the autumn of 1999 and the summer of 2000. Not only the logical structure but also the model parameters were feasible,and about 20 parameters were made to fit for the Jiaozhou Bay during the simulation. All of these are necessary to study the control mechanism of nutrients biogeochemical cycling in the Jiaozhou Bay and other China's coastal waters. | LI Keqiang WANG Xiulin LIANG Shengkang SHI Xiaoyong ZHU Chenjian CHEN Hu | 2008 | Acta Oceanologica Sinica2008，27，5： | 4 |
| 3 | Insight into the structural features of organic species in Fushun oil shale via thermal dissolution显示文摘Fushun oil shale(FOS) was subjected to thermal dissolution(TD) under different conditions. The results show that the optimal solvent, temperature, time, and ratio of solvent to FOS are ethanol, 300 °C, 2 h, and 5 ml·g^(-1),respectively and the corresponding yield of the soluble portion(SP) is 32.2%(daf), which is much higher than the oil content of FOS(ca. 6%), suggesting that TD in ethanol is an excellent way to extract organics from FOS.According to 3 direct analyses, aliphatic moieties in FOS are the most abundant followed by C\\O-containing moieties and each cluster in FOS has 3 conjugated aromatic rings on average with fewer substituents. According to the analysis with a gas chromatograph/mass spectrometer, alkanes are predominant in all the SPs. A number of alkenes were identified in the SPs from the TD, while none of the alkenes were detected in acetone-SP obtained at room temperature, implying that the TD can destroy the π-π and intertwining interactions between alkenes and macromolecular structures in FOS. Moreover, a small amount of alkyl-substituted phenols and alkoxysubstituted phenols were detected in ethanol-SP from the TD, which could be the products from ethanolyzing the macromolecular moiety of FOS. | Shengkang Wang Xianyong Wei Zhimin Zong | 2018 | Chinese Journal of Chemical Engineering2018，26，10： | 2 |
| 4 | Numerical Simulation of Nutrient and Phytoplankton Dynamics in Guangxi Coastal Bays, China显示文摘The increasing riverine pollutants have resulted in nutrient enrichment and deterioration of water quality in the coastal water of Guangxi Province, China. However, the quantitative relationship between nutrient loads and water quality responses, which is crucial for developing eutrophication control strategies, is not well studied. In this study, the riverine fluxes of nutrients were quantified and integrated with nutrient cycling and phytoplankton dynamics by using box models for Guangxi coastal bays. The model concepts and biogeochemical equations were the same; while most model parameters were specific for each bay. The parameters were calibrated with seasonal observations during 2006–2007, and validated with yearly averaged measurements in 2009. The general features of nutrient and phytoplankton dynamics were reproduced, and the models were proved feasible under a wide range of bay conditions. Dissolved inorganic nitrogen was depleted during the spring algal bloom in Zhenzhu Bay and Fangcheng Bay with relatively less nutrient inputs. Phosphorus concentration was high in spring, which decreased then due to continuous phytoplankton consumption. Chlorophyll-a concentration reached its annual maximum in summer, but was the minimum in winter. Eutrophication was characterized by both an increase in nutrient concentrations and phytoplankton biomass in Lianzhou Bay. Either about 80% reduction of nitrogen or 70% reduction of phosphorus was required to control the algal bloom in Lianzhou Bay. Defects of the models were discussed and suggestions to the environmental protection of Guangxi coastal bays were proposed. | QIAO Xudong WANG Baodong SUN Xia LIANG Shengkang | 2014 | Journal of Ocean University of China2014，13，2： | 1 |
| 5 | Algicidal activity of rhamnolipid biosurfactants produced by Pseudomonas aeruginosa显示文摘 | Wang Xiulin Gong Liangyu Liang Shengkang | 2005 | Harmful algae2005，4，2： | 1 |
| 6 | Crystallinity and hydrogen bonding of hard segment in segmented poly(urethane urea) copolymers显示文摘 | Wang Dening Ying Shengkang | 1996 | Polymer1996，37，16： | 1 |
| 7 | Algicidal activity of rhanmolipid biosurfactants produced by Pseudomonas aeruginosa 显示文摘 | Wang Xiulin Gong Liangyu Liang Shengkang | 2005 | Harmful Algae2005，4，2： | 1 |
| 8 | Hydrogonbonding between urethane and urea:Band assignment for the carbonyl region of FTIR spectrum显示文摘 | Luo Ning Wang Dening Ying Shengkang | 1996 | Polym1996，37，14： | 1 |
| 9 | Hydrogen-bonding properties of segmented polyether poly (urethane urea) copolymer显示文摘 | Luo Ning Wang Dening Ying Shengkang | 1997 | Macromolecules1997，30，15： | 1 |
| 10 | Estimation of the Maximum Allowable Loading Amount of COD in Luoyuan Bay by a 3-D COD Transport and Transformation Model显示文摘The rapid economic and social developments in the Luoyuan and Lianjiang counties of Fujian Province, China, raise certain environment and ecosystem issues. The unusual phytoplankton bloom and eutrophication, for example, have increased in severity in Luoyuan Bay(LB). The constant increase of nutrient loads has largely caused the environmental degradation in LB. Several countermeasures have been implemented to solve these environmental problems. The most effective of these strategies is the reduction of pollutant loadings into the sea in accordance with total pollutant load control(TPLC) plans. A combined three-dimensional hydrodynamic transport-transformation model was constructed to estimate the marine environmental capacity of chemical oxygen demand(COD). The allowed maximum loadings for each discharge unit in LB were calculated with applicable simulation results. The simulation results indicated that the environmental capacity of COD is approximately 11×104 t year-1 when the water quality complies with the marine functional zoning standards for LB. A pollutant reduction scheme to diminish the present levels of mariculture- and domestic-based COD loadings is based on the estimated marine COD environmental capacity. The obtained values imply that the LB waters could comply with the targeted water quality criteria. To meet the revised marine functional zoning standards, discharge loadings from discharge units 1 and 11 should be reduced to 996 and 3236 t year-1, respectively. | WU Jialin LI Keqiang SHI Xiaoyong LIANG Shengkang HAN Xiurong MA Qimin WANG Xiulin | 2014 | Journal of Ocean University of China2014，13，4： | 1 |
| 11 | The synthesis of ABA block copolymers by means of ‘ living’/controlled radical polymerization using hydroxyl-terminated oligomers as precursor显示文摘 | Wang Xiaosong Luo Ning Ying Shengkang | 2000 | Eur Polym2000，36，： | 1 |
| 12 | Algicidal ac- tivity of rhamnolipid biosurfactants produced by Pseudomonas aemginosa 显示文摘 | Xiulin Wang Liangyu Gonga Shengkang Liang | 2005 | Harmful Algae2005，，4： | 1 |
| 13 | Bacterial community along a historic lake sediment core of Ardley Island, west Antarctica显示文摘 | Shengkang Li Xiang Xiao Xuebin Yin Fengping Wang | 2006 | Extremophiles2006，，5： | 1 |
| 14 | Algcidal activity of rhanmolipid biosurfactants produced by Pseudomonas aeruginosa显示文摘 | WANG XIULIN GUO LIANYYU LIANG SHENGKANG | 2005 | Harmful Algae2005，，4： | 1 |
| 15 | Impact of Water-Sediment Regulation on Variations of Amino Acids in the Middle-Lower Yellow River, China显示文摘In order to examine the impacts of water-sediment regulation on regional carbon cycling,we collected water,particulate and sediment samples from the middle-lower Yellow River in late June and early July,2015 and analyzed their specific amino acids(AA),DOC,POC,and bacteria abundance.Summarized by 14 specific AA,the total hydrolysable AA(THAA),particulate AA(PAA),and sediment AA(SAA)varied in ranges of 2.29-9.05μmol L^-1,5.22-22.96μmol L^-1,and 81.7-137.19μg g^-1 dry weight.After the regulation,dissolved free AA(DFAA)decreased by 29%while DCAA increased by 72%.These variations suggested that DFAA were further degraded,while DCAA molecules were further activated.Meanwhile,PAA increased almost 4 times as many as those before regulation,and SAA increased as well.After regulation,the amounts of bioactive amino acids(Asp,Glu and Gly)increased in THAA but decreased in PAA,with little changes in SAA.The ratios of Asp/Gly in different phases increased after regulation,indicating the AA contributions were promoted by calcareous organisms rather than by siliceous organisms.Multiple correlation analysis showed that PAA was primary representatives of AA and organic carbon,followed by DCAA and POC.Moreover,bacterial reproduction played a key role in shaping the AA compositions and properties,followed by the redox condition and acid-base balance.The results of this study provided a clear evidence for the effects of water-sediment regulation on regional biogeochemistry of organic carbon in the middle-lower Yellow River. | ZHANG Kun ZOU Li DAI Qunying WANG Jian JIANG Xueyan LIANG Shengkang | 2020 | Journal of Ocean University of China2020，19，2： | 1 |
| 16 | Crystallinity and hydrogen bonding of hard segments in segmented poly(urethane urea) copolymer 显示文摘 | Luo Ning Wang Dening Ying Shengkang | 1996 | Polymer1996，37，16： | 1 |
| 17 | Myo-inositol accelerates the metamorphosis from megalopa to crablet of Scylla paramamosain by modulating cuticle decomposition and reconstruction显示文摘The mud crab Scylla paramamosain is a key species in China due to its high nutritional value and great economic worth and has grown in popularity.Myo-inositol can modulate versatile physiological functions in aquatic animals.In the present study,S.paramamosain megalopa were given graded concentrations of myo-inositol(0,1,2,4,and 8 ppm)by water immersion to explore how their metamorphosis would be affected.The results showed that supplementing with myo-inositol remarkably increased transformation and survival rate from megalopa to crablet by at least 1.16 and 1.26 times,respectively.To decipher the molecular mechanism of how myo-inositol increases metamorphosis and survival rate,we further performed transcriptome-based gene expression profiling of both megalopa and crablet treated with myo-inositol.The integrative transcriptome analyses predicted that the differentially expressed genes(DEGs)were significantly enriched in chitinase activity,structural constituent of cuticle,and chitin binding,which are associated with the decomposition and reconstruction of cuticle.qPCR results confirmed that myo-inositol mediated gene expression levels of the above cuticle-related pathways.Considering the importance of the cuticle in exoskeleton formation and molting,it can be concluded that myo-inositol-induced changes in the cuticle decomposition and reconstruction might have accelerated the transformation from megalopa to crablet of S.paramamosain.Besides,numerous DEGs were significantly enriched in protein digestion and absorption,amino sugar and nucleotide sugar metabolism.It implies that myo-inositol may improve survival by regulating energy or nutrient absorption.Additionally,the accelerated metamorphosis by myo-inositol may improve survival from megalopa to crablet of S.paramamosain.Overall,this study will provide the first insights into the underlying molecular mechanisms by which myo-inositol increases metamorphosis and survival. | Wenxiao Cui Hafiz Sohaib Ahmed Saqib Weifeng Gao Ruibo Wang Yang He Yang Yu Zhen Lin Qingyu Zhang Yin Zhang Shengkang Li Huaiping Zheng Yueling Zhang Mhd Ikhwanuddin Hongyu Ma | 2023 | Aquaculture and Fisheries2023，8，6： | 0 |
| 18 | A New Method for Studying the Distribution of Induced Defects in Potential Wells in a-Si : H/a-SiN_(x) : H Multilayer显示文摘The induced defects and their distribution in a-Si:H/a-SiN_(x):H multilayers can be determined by use of electromagnetic technique.It is found that the distributions of the induced defects in the interface regions on both sides of the a-Si:H sublayer are asymmetric and related to the growth direction of the film;a large number of induced defects exist in the interface region away from substrate,but few or no in the interface region near substrate. | WANG Zhichao GUO Shengkang CAO Guorong CHEN Cai SUN Meixiang | 1994 | Chinese Physics Letters1994，11，9： | 0 |
| 19 | Simultaneous Desorption of Polycyclic Aromatic Hydrocarbons and Heavy Metals from Contaminated Soils by Rhamnolipid Biosurfactants显示文摘Hydrophobic organic compounds(HOCs)and heavy metals(HMs)are toxins that usually coexist in natural environments.Due to the differences in their properties,it remains challenging to simultaneously remove HMs and HOCs.In this study,the removal of phenanthrene(Phe)and lead(Pb)from co-contaminated soils by single rhamnolipid(RL)and mixed RL-sophorolipid(SL)biosurfactants were evaluated via soil column experiments.Biosurfactant micelle sizes were determined by dynamic light scattering,and the mechanisms of micelle solubilization were studied.The effects of biosurfactant concentrations,pH,washing agent salinity and the ageing time of polluted soils on Phe and Pb desorption efficiencies were also assessed.The substantial removal of Phe and Pb using mixed RL-SL systems,when molar fractions of RLs were 0.7,was attributed to large mixed micelle formation and lower sorption losses of these systems.The optimal pH value was 6.0,while Phe desorption was favoured at high RLs and low ionic strengths.However,the RLs concentration and ionic strength had no obvious influence on Pb removal.In addition,both Phe and Pb desorption decreased with increased ageing of the polluted soils.Combined RL-SL biosurfactants can be effective for simultaneously removing HOCs and HMs from polluted soils. | WU Liang SONG Dandan YAN Lele LIANG Shengkang YANG Yanqun PENG Changsheng SHANG Yujun WANG Xiuli DONG Xueliang | 2020 | Journal of Ocean University of China2020，19，4： | 0 |
| 20 | Spatial Distribution Assessment and Source Apportionment of Land-Based Pollutant Yield from Qingdao, China显示文摘The spatial distribution of chemical oxygen demand(COD) and total nitrogen(TN) yield from Qingdao are studied by comparing pollutant yield amount, densities and spatial aggregation(Getis-Ord indexes) among the land-based pollutant source regions(PSRs) entering the three sub-seas(i.e. the Jiaozhou Bay(JZB), other coastal area in the Yellow Sea(OCAYS) and Laizhou Bay(LZB), respectively). Industrial composition of the loads are also studied by comparing pollutant yield among the sources of agriculture, rural domesticity, industry, urban domesticity and service, and calculation of Gini coefficient. Results show that spatial distribution of COD and TN yield from Qingdao are extremely unbalanced. The JZB, with less than 3% of the total coastal sea area of Qingdao, received 62% COD load and 65% TN yield from Qingdao, while the OCAYS, with more than 97% area, only received 23% COD and 20% TN, which consist with the much worsen water quality of JZB than that of OCAYS. On the other hand, the source apportionment of COD and TN loads in the PSRs entering JZB and the OCAYS was similar. The agricultural and domestic sources with high pollution intensity account for more than 80%, while the industrial and service sources with low pollution intensity account for less than 20%. While Gini coefficients, COD 0.81 and TN 0.84 which are much higher than the ‘imbalance' threshold of 0.4, show the uneven industrial structure of Qingdao. These results may be useful in the determination of land-based pollution total amount control at the PSR level. | SU Ying LIANG Shengkang ZHANG Peng WANG Xiulin | 2019 | Journal of Ocean University of China2019，18，1： | 0 |
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