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| 1 | Soil salinity prediction in the Lower Cheliff plain(Algeria) based on remote sensing and topographic feature analysis显示文摘Soil salinity and ground surface morphology in the Lower Cheliff plain(Algeria) can directly or indirectly impact the stability of environments. Soil salinization in this area is a major pedological problem related to several natural factors, and the topography appears to be important in understanding the spatial distribution of soil salinity. In this study, we analyzed the relationship between topographic parameters and soil salinity, giving their role in understanding and estimating the spatial distribution of soil salinity in the Lower Cheliff plain. Two satellite images of Landsat 7 in winter and summer 2013 with reflectance values and the digital elevation model(DEM) were used. We derived the elevation and slope gradient values from the DEM corresponding to the sampling points in the field. We also calculated the vegetation and soil indices(i.e. NDVI(normalized difference vegetation index), RVI(ratio vegetation index), BI(brightness index) and CI(color index)) and soil salinity indices, and analyzed the correlations of soil salinity with topography parameters and the vegetation and soil indices. The results showed that soil salinity had no correlation with slope gradient, while it was significantly correlated with elevation when the EC(electrical conductivity) values were less than 8 d S/m. Also, a good relationship between the spectral bands and measured soil EC was found, leading us to define a new salinity index, i.e. soil adjusted salinity index(SASI). SASI showed a significant correlation with elevation and measured soil EC values. Finally, we developed a multiple linear regression for soil salinity prediction based on elevation and SASI. With the prediction power of 45%, this model is the first one developed for the study area for soil salinity prediction by the combination of remote sensing and topographic feature analysis. | Ibrahim YAHIAOUI Abdelkader DOUAOUI ZHANG Qiang Ahmed ZIANE | 2015 | Journal of Arid Land2015，7，6： | 9 |
| 2 | Coordination Control of Power Flow Controller and Hybrid DC Circuit Breaker in MVDC Distribution Networks显示文摘The two main challenges of medium voltage direct current(MVDC)distribution network are the flexible control of power flow(PF)and fault protection.In this paper,the power flow controller(PFC)is introduced to regulate the PF and inhibit the fault current during the DC fault.The coordination strategy of series-parallel PFC(SP-PFC)and hybrid DC circuit breaker(DCCB)is proposed.By regulating the polarity and magnitude of SP-PFC output voltage during the fault,the rising speed of fault current can be suppressed so as to reduce the breaking current of hybrid DCCB.The access mode of SP-PFC to the MVDC distribution network and its topology are analyzed,and the coordination strategy between SP-PFC and hybrid DCCB is investigated.Moreover,the emergency control and bypass control strategies of SP-PFC are developed.On this basis,the mathematical model of SP-PFC in different fault stages is derived.With the equivalent model of SP-PFC,the fault current of the MVDC distribution network can be calculated accurately.A simulation model of the MVDC distribution network containing SP-PFC is established in MATLAB/Simulink.The fault current calculation result is compared with the simulation result,and the effectiveness of the proposed coordination strategy is verified. | Jianquan Liao Niancheng Zhou Zian Qin Pavel Purgat Qianggang Wang Pavol Bauer | 2021 | Journal of Modern Power Systems and Clean Energy2021，9，6： | 4 |
| 3 | GEOCHEMISTRY AND TECTONIC ENVIRONMENT AND RESERVOIR FORMATION OF MANTLE-DERIVED NATURAL GAS IN THE SONGLIAO BASIN, NORTHEASTERN CHINA显示文摘During several decades of exploration, a number of mantle-derived natural gas pools have been discovered in the vicinities of deep faults in the Songliao Basin, northeastern China. The natural gas in these pools has a δ13C1 value of ?16.50/00 to ?24.20/00, a reversed arrangement in the amount of carbon isotopes in methane and its endogamous products (namely, δ13C1 >δ13C2 >δ13C3 >δ13C4), a 3He/4He value of 1.97 to 2.34×10-6,and an Ar/36Ar value of 1063 to 1949. This indicates a mantle 40 source for the natural gas. The trace elements Cd, In, Te and Re, never found in organic-sourced hydrocarbons, are highly enriched in certain crude oils from the Basin; respectively, concentrations of these elements were found to be 751, 28, 16 and 323 times the average crustal values in China, and this also supports a mantle-derived natural gas origin. The characteristics of mantled-derived magmatic rocks, hydrothermal fluids and gaseous fractions distributed in and near the deep Songliao Basin faults indicate that rifting tectonics is providing the mechanisms for this outgassing of the mantle. Deep extensional (normal) faults provide pathways for upward movement of these materials, and in the Songliao Basin, these deep rift fault zones are associated with reservoir occurrence and cap rock seals, forming good sites for accumulation of mantle-derived natural gas. Furthermore, a layer of low velocity, low density and high conductivity in the deep crust has been identified as a potential reservoir for mantle-derived natural gas. | LI Zian GUO Zhanqian BAI Zhenguo LIN Ge | 2004 | Geotectonica et Metallogenia2004，28，2： | 2 |
| 4 | Dark pulse emission in nonlinear polarization rotation-based multiwavelength mode-locked erbium-doped fiber laser显示文摘We experimentally show dark pulse generation in all-normal dispersion multiwavelength erbium-doped fiber laser(EDFL) with a long cavity of figure-of-eight configuration. The EDFL generates a stable multiwavelength laser with 0.47 nm spacing at 24 m W threshold pump power, while the number of lines obtained increases with the pump power. A dark pulse emission is observed as the pump power is increased above 137 m W, with fundamental repetition rate of 29 k Hz and pulse width of 2.7 μs. It is observed that the dark pulse train can be shifted to second-, third-, and fourth-order harmonic dark pulses by carefully adjusting the polarization controller. For the fundamental dark pulse, the maximum pulse energy of 32.4 n J is obtained at pump power of 146.0 mW. | Zian Cheak Tiu Sin Jin Tan Harith Ahmad Sulaiman Wadi Harun | 2014 | Chinese Optics Letters2014，12，11： | 2 |
| 5 | Study on the Production Technology of Pueraria lobata Jelly显示文摘An orthogonal experiment was carried out to investigate the optimal production formula of Pueraria lobata jelly combining P. lobata,red beans and sugar as the main raw materials. The isoflavone contents in P. lobata and the P. lobata jelly were determined by colorimetry and sensory evaluation. The results showed that the optimal formula for the product was: P. lobata paste 50%,red bean paste 60%,and white granular sugar and agar 20% and 3% of the total weight of P. lobata paste and bean paste,respectively. The development of this product is of great significance to the utilization of P. lobata. | Zhiyang QI Kai XIONG Zian SONG Li TIAN Yuanping FANG | 2017 | Agricultural Biotechnology2017，6，5： | 2 |
| 6 | Finite-dimensional attractors and exponential attractors for the Navier-Stokes equations of compr- essible flow显示文摘 | David Hoff Mohammed Ziane | 2003 | SIAM J Math Anal2003，34，5： | 1 |
| 7 | A Digitally Con- trolled Three-phase Cycloconverter Type High Frequency AC Link Inverter Using Space Vector Modulation 显示文摘 | Deshang Sha Qin Zian Wu Dan | 2011 | Journal of Power Electronics2011，11，1： | 1 |
| 8 | Asymptotic analysis of the Navier-Stokes equations in thin domain显示文摘 | T emamR Ziane M | 1997 | Topoi Methods Nonlinear Anal1997，10，： | 1 |
| 9 | NavierStokes equation in three dimensional domain with various boundary conditions显示文摘 | Ziane M | 1996 | Advances in Differentiai Equations1996，4，： | 1 |
| 10 | The Navier-Stokes equations in three-dimensinal yhin domains with various boundary conditions显示文摘 | Ziane M | 1996 | Advances in Differential Equations1996，1，4： | 1 |
| 11 | Navier-Stokes equations in thin spherical domains显示文摘 | Ziane M | 1997 | Contemp Math1997，209，： | 1 |
| 12 | Crinoid phylogeny: a preliminary analysis (Echinodermata: Crinoidea)显示文摘 | Bernard L. Cohen Nadia Améziane Marc Eleaume Bertrand Richer Forges | 2004 | Marine Biology2004，，3： | 1 |
| 13 | Improvement of Fluorescence Lifetime from Er-Doped Sol-Gel Silica Glass by Dehydration in CCl4显示文摘 | Yigang Li Liying Liu Zian He Hengsheng Tang Shumin Xiao Lei Xu Wencheng Wang | 2004 | Journal of Sol - Gel Science and Technology2004，，1： | 1 |
| 14 | Synthesis and Characterization of a Neodymium Zirconate Pyrochlore Doped with Ytterbium: (YbxNdl-x)2Zr2O7 (x = 0.1, 0.25 and 0.4)显示文摘 | Nour-el-hayet Kamel Dalila Moudir Ziane Kamel Hamid Ait-Amar | 2013 | 材料科学与工程(中英文B版)2013，3，1： | 1 |
| 15 | On a Certain Renormalization Group Method 显示文摘 | Ziane M | 2000 | J Mah Phys2000，41，5： | 1 |
| 16 | Clustering spatial data in the presence of obstacles a density-based approach 显示文摘 | Osmar R Ziane Chi-Hoon Lee | 2002 | IEEE2002，，： | 1 |
| 17 | Effect of injection rate on hypotension associated with spinal anesthesia for cesarean section 显示文摘 | Simon L Boulay G Ziane AF | 2000 | IntJObstetAnesth2000，9，1： | 1 |
| 18 | Sexual marathons and methamphetamine use among HIV-positive men who have sex with men显示文摘 | Semple S J Zians J Strathdee S A | 2009 | Archives of Sexual Behavior2009，38，4： | 1 |
| 19 | Long chain branch polymer chain dimensions: application of topology to the zimm-stochmayer model显示文摘 | BONCHEV D MARKEL E J DEKMF ZIAN A H | 2002 | Polymer2002，43，： | 1 |
| 20 | Effect of injection rate on hypotension associated with spinal anesthesia for cesarean section显示文摘 | Simon L Boulay G Ziane A F | 2000 | International Journal of Obstetric Anesthesia2000，9，1： | 1 |
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