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| 1 | Effect of SiO2 addition on NH4HSO4 decomposition and SO2 poisoning over V2O5-MoO3/TiO2-CeO2 catalyst显示文摘The deposition of NH4 HSO4 and the poisoning effect of SO2 on SCR catalyst are the main obstacles that restrict the industrial application of CeO2-doped SCR catalysts.In this work,deposited NH4 HSO4 decomposition behavior and SO2 poisoning over V2 O5-MoO3/TiO2 catalysts modified with CeO2 and SiO2 were investigated.By the means of characterization analysis,it was found that the addition of SiO2 into VMo/Ti-Ce had an impact on the interaction existed between catalyst surface atoms and NH4 HSO4.Temperatureprogrammed methods and in situ diffused reflectance infrared Fourier transform spectroscopy(DRIFTS)experiments indicated that the doping of SiO2 promoted the decomposition of deposited NH4 HSO4 on VMo/Ti-Ce catalyst surface by reducing the thermal stability of NH4 HSO4 and enhancing the NH4 HSO4 reactivity with NO in low temperature.And this improvement may be the reason for the better catalytic activity than VMo/Ti-Ce in the case of NH4 HSO4 deposition.Accompanied with cerium sulfate species generated over catalyst surface,the conversion of SO2 to SO3 was inhibited in SiCe mixed catalyst.The addition of SiO2 could promote the decomposition of cerium sulfate,which may be a potential strategy to enhance the resistance of SO2 poisoning over CeO2-modifed catalysts. | Chengqiang Zheng Teng Cheng Linjun Yang Hao Wu Hongmei Fan | 2020 | Journal of Environmental Sciences2020，32，5： | 6 |
| 2 | A modified structure internal model robust control method for the integration of active front steering and direct yaw moment control显示文摘Taking into account the nonlinearity of vehicle dynamics and the variations of vehicle parameters,the integrated control strategy for active front steering(AFS)and direct yaw control(DYC)that can maintain the performance and robustness is a key issue to be researched.Currently,the H∞method is widely applied to the integrated control of chassis dynamics,but it always sacrifices the performance in order to enhance the stability.The modified structure internal model robust control(MSIMC)obtained by modifying internal model control(IMC)structure is proposed for the integrated control of AFS and DYC to surmount the conflict between performance and robustness.Double lane change(DLC)simulation is developed to compare the performance and the stability of the MSIMC strategy,the PID controller based on the reference vehicle model and the H∞controller.Simulation results show that the PID controller may oscillate and go into instability in severe driving conditions because of large variations of tire parameters,the H∞controller sacrifices the performance in order to enhance the stability,and only the MSIMC controller can both ensure the robustness and the high performance of the integrated control of AFS and DYC. | WU Jian ZHAO YouQun JI XueWu LIU YaHui YIN ChengQiang | 2015 | Science China(Technological Sciences)2015，58，1： | 6 |
| 3 | Morphological Characteristics of Sand Waves in the Middle Taiwan Shoal Based on Multi-beam Data Analysis显示文摘A DTM map of the study area in the Taiwan Shoal was drawn based on precise and highdensity data acquired in a field survey by a multi-beam sounding system(R2Sonic2024). We identified sand waves in the study area at water depths of 13.89–49.12 m; the main sand waves had heights of 5–25 m, lengths of 0.1–2.0 km, and crest lines 0.1–6.5 km long. The spatial distribution of the sand waves on the seabed is dense in the north and sparse in the south and the directions range between 50°–80° and 90°–135°. Between the main sand waves, secondary sand waves develop with heights of 0.1–5.0 m and lengths of 10–100 m, which are difficult to detect by satellite remote sensing. By comparing the evolution structures of the secondary and main sand waves, we identified three evolution modes of the secondary sand waves: parallel, oblique, and divergent modes according to the relative crest directions. Suitable water depth, reciprocating current speeds between 40 and 100 cm/s, and abundant sediment supply create favorable conditions for the formation of linear sand waves. Comparing the DTM maps and profiles of the June 2012 and June 2013 surveys of the same area, we found that the shape and morphology of the sand waves remained mostly unchanged under normal hydrodynamic conditions. | BAO Jingjing CAI Feng REN Jianye ZHENG Yongling WU Chengqiang LU Huiquan XU Yan | 2014 | Acta Geologica Sinica(English Edition)2014，88，5： | 5 |
| 4 | Fiber-shaped organic electrochemical transistors for biochemical detections with high sensitivity and stability显示文摘Precise and continuous monitoring of biochemicals by biosensors assists to understand physiological functions for various diagnostics and therapeutic applications.For implanted biosensors,small size and flexibility are essential for minimizing tissue damage and achieving accurate detection.However,the active surface area of sensor decreases as the sensor becomes smaller,which will increase the impedance and decrease the signal to noise ratio,resulting in a poor detection limit.Taking advantages of local amplification effect,organic electrochemical transistors(OECTs)constitute promising candidates for high-sensitive monitoring.However,their detections in deep tissues are rarely reported.Herein,we report a family of implantable,fiber-shaped all-in-one OECTs based on carbon nanotube fibers for versatile biochemical detection including H2O2,glucose,dopamine and glutamate.These fiber-shaped OECTs demonstrated high sensitivity,dynamical stability in physiological environment and antiinterference capability.After implantation in mouse brain,7-day dopamine monitoring in vivo was realized for the first time.These fiber-shaped OECTs could be great additions to the'life science'tool box and represent promising avenue for biomedical monitoring. | Xiaoying Wu Jianyou Feng Jue Deng Zhichang Cui Liyuan Wang Songlin Xie Chuanrui Chen Chengqiang Tang Zhengqi Han Hongbo Yu Xuemei Sun Huisheng Peng | 2020 | Science China Chemistry2020，63，9： | 3 |
| 5 | HOPF BIFURCATION AND UNIQUENESS OF LIMIT CYCLE FOR A CLASS OF QUARTIC SYSTEM显示文摘This paper studies a class of quartic system which is more general and realistic than the quartic accompanyingsystem. x′=-y+ex+lx^2+mxy+ny^2,y′=x(1-Ay)(1+Cy^2),(*) where C>0.Sufficient conditions are obtained for the uniqueness of limit cycle of system(*) and some more in-depth conclusion such as Hopf bifurcation. | Zhan Qingyi Xie Xiangdong Wu Chengqiang Qiu Shulin | 2007 | Applied Mathematics(A Journal of Chinese Universities)2007，22，4： | 2 |
| 6 | Qualitative analysis of a predator-prey model with constant rate prey harvesting incorporating a constant prey refuge显示文摘 | JI Lili WU Chengqiang | | 0，，： | 1 |
| 7 | Denitrification removal of nitric oxide in a rotating drum biofilter显示文摘 | Jiade Wang Chengqiang Wu Jianmeng Chen Haijie Zhang | 2006 | Chemical Engineering Journal2006，，1： | 1 |
| 8 | Dynamic behaviors of a Lotka-Volterra predator-prey model incorporating a prey refuge and predator mutual interference显示文摘 | Zhaozhi Ma Fengde Chen Chengqiang Wu Wanlin Chen | 2013 | Applied Mathematics and Computation2013，，： | 1 |
| 9 | UNIQUENESS OF LIMIT CYCLE FOR A CLASS OF QUARTIC SYSTEM ACCOMPANYING WITH QUADRATIC SYSTEM显示文摘In this paper,we consider a class of quartic system,which is more general and realistic than the quartic accompanying system. Consequently,we obtain sufficient conditions concerning the uniqueness of limit cycle as well as some other in-depth conclusions. | Zhan Qingyi(College of Computer and Information Science,Fujian Agriculture and Forestry University,Fuzhou 350002) Xie Xiangdong(Dept. of Math.,Ningde Teachers College,Ningde 352100,Fujian) Wu Chengqiang(College of Math. and Computer Science,Fuzhou University,Fuzhou 350002) | 2008 | Annals of Differential Equations2008，24，2： | 1 |
| 10 | The criterion of the center-focus for a class of planar perturbed polynomial systems 显示文摘 | Wu Chengqiang | 2006 | J Math Anal Appl2006，，319： | 1 |
| 11 | Performance evaluation of biofihers packed with carbon foam and lava for nitric oxide removal显示文摘 | JIANMENG CHEN CHENGQIANG WU JIADE WANG JIANFENG MA | 2006 | Journal of Hazardous Materials2006，137，： | 1 |
| 12 | Impact of coastal engineering constructions on the topographic and morpho- logical evolution of Quanzhou Bay, Fujian, China显示文摘 | Wu Chengqiang Cai Feng Zhao Guangtao | 2011 | Ocean &Coastal Management2011，54，7： | 1 |
| 13 | Observation of electron–phonon coupling and linear dichroism in PL spectra of ultra-small CsPbBr3 nanoparticle solution显示文摘Blue-emission(~480 nm)CsPbBr3 nanoparticles with ultra-small size(~2.1 nm)are synthesized using the liquid nitrogen freezing with the ligand of dodecylbenzene sulfonic acid(DBSA).Asymmetric narrow emissions at the low energy side,with the full width at half-maximum of~20 nm,are observed in solution and film at room temperature.The spectral asymmetry is mainly ascribed to phonon vibronic replica with averaged phonon energy of~40 meV.Moreover,exciting this CsPbBr3 nanoparticles solution using linearly polarized 6 ns pulsed laser at 355 nm,we observe polarized emission with polarization degree(PPL)of~7%,and PPL decreases more than 20%in the vibronic progression.However,the PPL goes to zero in frozen solutions as well as in films.Thus we speculate the polarized emission is due to the photoinduced re-alignment of nanoparticles,and the diminished PPL at the phonon side band may be due to the non-adiabatic electronic-to-vibronic transitions.The novel phenomena from the ultra-small CsPbBr3 nanoparticle demonstrated in this work may provide fundamental insights into its photophysics with direct implications for optoelectronics. | Chengqiang Wang Tao Song Pingyuan Yan Shu Hu Chenhong Xiang Zihan Wu Heng Li Haibin Zhao Lili Han Chuanxiang Sheng | 2023 | eScience2023，3，6： | 0 |
| 14 | THE ESTIMATION OF CHARACTERISTIC EXPONENTS FOR A CLASS OF SECOND ORDER LINEAR DIFFERENTIAL EQUATION WITH PERIODIC COEFFICIENTS显示文摘In this paper we shall give a simple and easy method to estimate the characteristic exponents for a class of second order linear different equation with periodic coefficient which frequently occurs in application. | Wu Chengqiang | 2006 | Annals of Differential Equations2006，22，4： | 0 |
| 15 | GLOBAL ATTRACTIVITY IN AN ALMOST PERIODIC PREDATOR-PREY-MUTUALIST SYSTEM显示文摘In this paper, the almost periodic predator-prey-mutualist model with Holling type II functional response is discussed. A set of sufficient conditions which guarantee the uniform persistence and the global attractivity of the system are obtained. For the almost periodic case, by constructing a suitable Lyapunov function, sufficient conditions which guarantee the existence of a unique globally attractive positive almost periodic solution of the system are obtained. An example together with its numerical simulations shows the feasibility of the main results. | Liya Yang Fengde Chen Chengqiang Wu Xiangdong Xie | 2016 | Annals of Applied Mathematics2016，32，1： | 0 |
| 16 | Regeneration and anti-migration of sand waves associated with sand mining in the Taiwan Shoal显示文摘Sand waves in the Taiwan Shoal are characterized by two distinct spatial scales. Giant sand waves have a length of2 kilometers with height between 5 m and 25 m, whilst small sand waves is less than 100-m long with height less than 5 m between giant sand wave peaks(crests). A series of five high-resolution multi-beam echo-sounding surveys between 2012 and 2020 in the middle of Taiwan Shoal indicated that artificial dredging on the giant sand waves had caused sand wave reform and evolution. Overall, the removal of giant sand waves significantly affected the migration of small sand waves adjacent to the dredging site, with the latter on both sides of the former appear to migrate towards the dredging pit. Moreover, in the dredging area, new sand waves emerged with wavelength much smaller than the original giant sand waves, while the convergent pattern of the small sand waves tends to store and form the giant sand waves, which might spread far beyond the survey period. | Jingjing Bao Feng Cai Chengqiang Wu Huiquan Lu Yongling Zheng Yufeng Li Li Sun Chungeng Liu Yongbao Li | 2023 | Acta Oceanologica Sinica2023，42，9： | 0 |
| 17 | Evolution of the North Atlantic Current and Barents Ice Sheet as revealed by grain size populations in the northern Norwegian Sea during the last 60 ka显示文摘The grain size distribution of bulk sediment samples was decomposed in a core to reconstruct paleoceanographic evolution over the past 60 ka in the northern Norwegian Sea.The results show that sediments consisted of 3–4 grain populations derived from the North Atlantic Current(NAC)and Barents Ice Sheet(BIS).The grain size data suggest three palaeoceanographic evolution stages:(1)an environment affected by BIS and NAC and changed with the interstadial/stadial transition in phase with the Greenland ice-core record at 60–31 ka BP,during which discharge of icebergs and the content of the coarsest population containing ice-rafted debris(IRD)in the sediments increased significantly during stadial,while the fine silt population containing volcanic glasses increased with the enhancement of NAC during the interstadial;(2)an extreme environment controlled by BIS at31–13 ka BP.BIS reached to its maximum at about 31 ka BP and the turbid plumes that formed at the leading edge of BIS contributed to a significant increase in the clayey population in sediments.Icebergs drained into the northern Norwegian Sea with periodical calving of the BIS at 31–19 ka BP.Subsequently,the ablation of the BIS discharged massive floods with clayey sediments and icebergs into the Norwegian Sea at 19–13 ka BP,resulting in a constant increase in clay and IRD in sediments;and(3)a marine environment similar to the present one under the strong influence of NAC following the complete melting of the BIS after 13 ka BP,NAC is the dominant transport agent and no IRD occurred in sediments.The fine silt populations containing volcanic glasses transported by NAC significantly increased. | Weiguo Wang Mengwei Zhao Yanguang Liu Min Jiang Chengqiang Wu Yang Liu | 2021 | Acta Oceanologica Sinica2021，40，10： | 0 |
| 18 | Piezoelectric Zinc Oxides with High Polar Facets Ratios for Mechanically Controlled RAFT Polymerization显示文摘Mechanoredox chemistry that uses highly polarized piezoelectric materials as mechanoredox catalysts to promote redox reactions has emerged recently.It provides an alternative approach alongside the existing polymerization methods.Despite recent accomplishments,determining the quantitative relationship between the structure of ZnO and its catalytic performance for polymerization is still challenging.Herein,we prepared various ZnO crystals with different polar facets ratios to achieve efficient mechanically induced reversible addition-fragmentation chain transfer polymerization(mechano-RAFT).ZnO prepared from Zn(NO3)2 showed a high polar facet ratio of 1.66 and offered the highest catalytic activity among all ZnO samples.A near-quantitative initiator efficiency of 99.5%and narrow molecular weight distribution were achieved for the polymerization of n-butyl acrylate.Furthermore,the high chain-end fidelity and chain extension capability were also evidenced by MALDI-TOF MS and GPC analysis.This work highlighted the significant contribution of polar facets in ZnO to its catalytic activity and will guide the design of mechanoredox catalysis with superior catalytic performance in the future. | Chengqiang Ding Ziye Ren Jian Wang Longfei Zhang Yuhan Yan Danming Wu Zhao Wang Zhengbiao Zhang | 2023 | Chinese Journal of Chemistry2023，41，20： | 0 |
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