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| 1 | Effects of freeze-thaw on soil erosion processes and sediment selectivity under simulated rainfall显示文摘The freeze-thaw(FT) processes affect an area of 46.3% in China. It is essential for soil and water conservation and ecological construction to elucidate the mechanisms of the FT processes and its associated soil erosion processes. In this research, we designed the control simulation experiments to promote the understanding of FT-water combined erosion processes. The results showed that the runoff of freeze-thaw slope(FTS) decreased by 8% compared to the control slope(CS), and the total sediment yield of the FTS was 1.10 times that of the CS. The sediment yield rate from the FTS was significantly greater than that from the CS after 9 min of runoff(P<0.01). Both in FTS and CS treatments, the relationships between cumulative runoff and sediment yield can be fitted well with power functions(R2>0.98, P<0.01). Significant differences in the mean weight diameter(MWD) values of particles were observed for washed particles and splashed particles between the CS and the FTS treatments in the erosion process(P<0.05). The mean MWD values under CS were smaller than those under FTS for both washed and splashed particles. The ratio of the absolute value of a regression coefficient between the CS and the FTS was 1.15, being roughly correspondent with the ratio of K between the two treatments. Therefore, the parameter a of the power function between cumulative runoff and sediment yield could be an acceptable indicator for expressing the soil erodibility. In conclusion, the FTS exhibited an increase in soil erosion compared to the CS. | WANG Tian LI Peng REN Zongping XU Guoce LI Zhanbin YANG Yuanyuan TANG Shanshan YAO Jingwei | 2017 | Journal of Arid Land2017，9，2： | 8 |
| 2 | A feedback-retransmission based asynchronous frequency hopping MAC protocol for military aeronautical ad hoc networks显示文摘Attacking time-sensitive targets has rigid demands for the timeliness and reliability of information transmission, while typical Media Access Control(MAC) designed for this application works well only in very light-load scenarios; as a consequence, the performances of system throughput and channel utilization are degraded. For this problem, a feedback-retransmission based asynchronous FRequency hopping Media Access(FRMA) control protocol is proposed. Burst communication, asynchronous Frequency Hopping(FH), channel coding, and feedback retransmission are utilized in FRMA. With the mechanism of asynchronous FH, immediate packet transmission and multi-packet reception can be realized, and thus the timeliness is improved.Furthermore, reliability can be achieved via channel coding and feedback retransmission. With theories of queuing theory, Markov model, packets collision model, and discrete Laplace transformation, the formulas of packet success probability, system throughput, average packet end-to-end delay, and delay distribution are obtained. The approximation accuracy of theoretical derivation is verified by experimental results. Within a light-load network, the proposed FRMA has the ability of millisecond delay and 99% reliability as well as outperforms the non-feedback-retransmission based asynchronous frequency hopping media access control protocol. | Jinhui TANG Yequn WANG Shufu DONG Qilu SUN Guoce HUANG | 2018 | Chinese Journal of Aeronautics2018，31，5： | 4 |
| 3 | Fractal features of soil particle-size distribution and total soil nitrogen distribution in a typical watershed in the source area of the middle Dan River, China显示文摘 | Guoce Xu Zhanbin Li Peng Li | 2013 | Catena2013，，： | 2 |
| 4 | PhotocatalyticdegradationofcarbamazepinebytailoredBiPO4:efficiency,intermediatesandpath-way显示文摘 | XuJ LiL GuoC etal | 2012 | AppliedCatalysisB:Environmental2012，，： | 1 |
| 5 | Fractal features of soil particle-size distribution and total soil nitrogen distribution in a typical watershed in the source area of the middle Dan River, China显示文摘 | Xu Guoce Li Zhanbin Li Peng | 2013 | Catena2013，1723，： | 1 |
| 6 | Spatial variability of soil organic carbon in a watershed of the Dan River, China显示文摘 | Xu Guoce Li Zhanbin Li Peng | 2013 | Soil Research2013，，51： | 1 |
| 7 | Has“Grain for Green”threaten food security on the Loess Plateau of China?显示文摘There is debating over the question of whether the large-scale‘Grain for Green’program on the Loess Plateau of China threatens regional food security.Self-sufficiency index and cropland pressure index were used to assess food security on the Loess Plateau after the implementation of revegetation program.The results showed that the‘Grain for Green’program initially had a considerable impact on regional food security,where grain yield fell from 1999 to 2001,resulting in a lower grain self-sufficiency and increased farmland stress.Subsequently,grain yield in this region increased due to the elevated agricultural material input and increased construction of terraces and check dams.The grain self-sufficiency index would have increased to 96.55%if there were improvements to the agricultural conditions,such as fertilization and irrigation,which would have resulted in an increase in the crop yield per unit of 20%.However,the grain self-sufficiency increased to 105.25%via the construction of terraces and check dams.Thus,the government should further expand the‘Grain for Green’program in coordination with improvements to the agricultural production conditions and the construction of terraces and check dams on the Loess Plateau. | Peng Shi Zhaohong Feng Haidong Gao Peng Li Xiaoming Zhang Tiantian Zhu Zhanbin Li Guoce Xu Zongping Ren Lie Xiao | 2020 | Ecosystem Health and Sustainability2020，6，1： | 1 |
| 8 | Bioanalyticalmethodologyvalidation[J]显示文摘 | ZHANG1P GUOC | | 中国药师0，，： | 1 |
| 9 | MicrostructureandcorrosionbehaviorofmicroGarcoxidationcoatingon6061aluminumalloypreGtreatedbyhighGtemperatureoxidation显示文摘 | ShenDJ LiGL GuoC H etal | 2013 | AppliedSurfaceScience2013，287，15： | 1 |
| 10 | Fractal features of soil particle-size distribution and total soil nitrogen distribution in a typical watershed in the source area of the middle Dan River,China显示文摘 | Xu Guoce Li Zhanbin Li Peng | 2013 | Catena2013，101，： | 1 |
| 11 | Fractal features of soil particle-size distribution and total soil nitrogen distribution in a typical watershed in the source area of the middle Dan River, China显示文摘 | Guoce Xu Zhanbin Li Peng Li | 2013 | Catena2013，，： | 1 |
| 12 | Waveform design for radar and extended target in the environment of electronic warfare显示文摘Transmit waveform optimization is critical to radar system performance. There have been a fruit of achievements about waveform design in recent years. However, most of the existing methods are based on the assumption that radar is smart and the target is dumb, which is not always reasonable in the modern electronic warfare. This paper focuses on the waveform design for radar and the extended target in the environment of electronic warfare. Three different countermeasure models between smart radar and dumb target, smart target and dumb radar, smart radar and smart target are proposed. Taking the signal-to-interferenceplus-noise ratio(SINR) as the metric, optimized waveforms for the first two scenarios are achieved by the general water-filling method in the presence of clutter. For the last case, the equilibrium between smart radar and smart target in the presence of clutter is given mathematically and the optimized solution is achieved through a novel two-step water-filling method on the basis of minmax theory. Simulation results under different power constraints show the power allocation strategies of radar and target and the output SINRs are analyzed. | WANG Yuxi HUANG Guoce LI Wei | 2018 | Journal of Systems Engineering and Electronics2018，29，1： | 1 |
| 13 | Pretreatment of rice straw by a hot-compressed water process for enzymatic hy- drolysis显示文摘 | YU Guoce YANO S INOUE H | 2010 | Applied Biochemistry and Biotechnology2010，160，2： | 1 |
| 14 | Fractal features of soil particle-size distribution and total soil nitrogen distribu- tion in a typical watershed in the source area of the mid- dle Dan River, China 显示文摘 | Xu Guoce Li Zhanbin Li Peng | 2013 | Catena2013，101，： | 1 |
| 15 | Effect and aftereffect of radiation pretreatment on enzymatic hydrolysis of wheat straw 显示文摘 | Yang Chunping Shen Zhiqiang Yu Guoce Wang Jianlang | 2008 | Bioresource Technology2008，99，： | 1 |
| 16 | Effect of Coating on the Microstructure and Thermal Conductivities of Diamond-Cu Composites Prepared by Powder Metallurgy显示文摘 | RenS B Shen XY GuoC Y | | 0，，： | 1 |
| 17 | 显示文摘 | 邹吉军(ZouJJ) 郭成(GuoC) 张香文(ZhangXW) 王莅(WangL) 米镇涛(MiZT) | 2014 | 推进技术2014，35，： | 1 |
| 18 | Effectand aftereffect of 7 radiation pretreatment on enzymatichydrolysis of wheat straw 显示文摘 | Yang Chunping Shen Zhiqiang Yu Guoce | 2008 | Bioresour Technol2008，99，14： | 1 |
| 19 | Effects of surfactants on electrodeposition of nickel-carbon nanotubes composite coatings 显示文摘 | GUOC ZUO Y ZHAO X H | 2008 | Surface and Coatings Technology2008，202，14： | 1 |
| 20 | The JAKand STAT family members of the mandarin fish Siniperca chuatsi: Molecular cloning, tissues distribution and immunobiologicalactivity显示文摘 | GUOC J ZHANG Y F YANG L S | 2009 | Fish & Shellfish Immunology2009，27，2： | 1 |
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