|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Joint TDOA and AOA location algorithm显示文摘For the joint time difference of arrival(TDOA) and angle of arrival(AOA) location scene,two methods are proposed based on the rectangular coordinates and the polar coordinates,respectively.The problem is solved perfectly by calculating the target position with the joint TDOA and AOA location.On the condition of rectangular coordinates,first of all,it figures out the radial range between target and reference stations,then calculates the location of the target.In the case of polar coordinates,first of all,it figures out the azimuth between target and reference stations,then figures out the radial range between target and reference stations,finally obtains the location of the target.Simultaneously,simulation analyses show that the theoretical analysis is correct,and the proposed methods also provide the application of the joint TDOA and AOA location algorithm with the theoretical basis. | Congfeng Liu Jie Yang Fengshuai Wang | 2013 | Journal of Systems Engineering and Electronics2013，24，2： | 30 |
| 2 | Tillage and straw mulching impacts on grain yield and water use efficiency of spring maize in Northern Huang–Huai–Hai Valley显示文摘A two-year field experiment(2012–2013) was conducted to investigate the effects of two tillage methods and five maize straw mulching patterns on the yield, water consumption,and water use efficiency(WUE) of spring maize(Zea mays L.) in the northern Huang–Huai–Hai valley of China. Compared to rotary tillage, subsoil tillage resulted in decreases in water consumption by 6.3–7.8% and increases in maize yield by 644.5–673.9 kg ha-1, soil water content by 2.9–3.0%, and WUE by 12.7–15.2%. Chopped straw mulching led to higher yield,soil water content, and WUE as well as lower water consumption than prostrate whole straw mulching. Mulching with 50% chopped straw had the largest positive effects on maize yield, soil water content, and WUE among the five mulching treatments. Tillage had greater influence on maize yield than straw mulching, whereas straw mulching had greater influence on soil water content, water consumption, and WUE than tillage. These results suggest that 50% chopped straw mulching with subsoil tillage is beneficial in spring maize production aiming at high yield and high WUE in the Huang–Huai–Hai valley. | Zhiqiang Tao Congfeng Li Jingjing Li Zaisong Ding Jie Xu Xuefang Sun Peilu Zhou Ming Zhao | 2015 | The Crop Journal2015，3，5： | 26 |
| 3 | Direct solution for fixed source location using well-posed TDOA and FDOA measurements显示文摘Based on the time differences of arrival(TDOA) and frequency differences of arrival(FDOA) measurements of the given planar stationary radiation source, the joint TDOA/FDOA location algorithm which solves the location of the target directly is proposed. Compared with weighted least squares(WLS) methods,the proposed algorithm is also suitable for well-posed conditions,and gets rid of the dependence on the constraints of Earth's surface. First of all, the solution formulas are expressed by the radial range. Then substitute it into the equation of the radial range to figure out the radial range between the target and the reference station. Finally use the solution expression of the target location to estimate the location of the target accurately. The proposed algorithm solves the problem that WLS methods have a large positioning error when the number of observation stations is not over-determined. Simulation results show the effectiveness of the proposed algorithm, including effectively increasing the positioning accuracy and reducing the number of observatories. | LIU Congfeng YUN Jinwei SU Juan | 2020 | Journal of Systems Engineering and Electronics2020，31，4： | 5 |
| 4 | Integrated agronomic practice increases maize grain yield and nitrogen use efficiency under various soil fertility conditions显示文摘Crop yield potential can be increased through the use of appropriate agronomic practices. Integrated agronomic practice (IAP) is an effective way to increase maize (Zea mays L.) grain yield and nitrogen use efficiency (NUE);however, the physiological processes associated with gains in yield potential obtained from IAP, particularly the different under various soil fertility conditions, remain poorly understood. An IAP strategy including optimal planting density, split fertilizer application, and subsoiling tillage was evaluated over two growing seasons to determine whether the effects of IAP on maize yield and NUE differ under different levels of soil fertility. Compared to farmers' practices (FP), IAP increased maize grain yield in 2013 and 2014 by 25% and 28%, respectively, in low soil fertility (LSF) fields and by 36% and 37%, respectively, in high soil fertility (HSF) fields. The large yield gap was attributed mainly to greater dry matter (DM) and N accumulation with IAP than with FP owing to increased leaf area index (LAI) and DM accumulation rate, which were promoted by greater soil mineral N content (Nmin) and root length. Post-silking DM and N accumulation were also greater with IAP than with FP under HSF conditions, accounting for 60% and 43%, respectively, of total biomass and N accumulation;however, no significant differences were found for post-silking DM and N accumulation between IAP and FP under LSF conditions. Thus, the increase in grain yield with IAP was greater under HSF than under LSF. Because of greater grain yield and N uptake, IAP significantly increased N partial factor productivity, agronomic N efficiency, N recovery efficiency, and physiological efficiency of applied N compared to FP, particularly in the HSF fields. These results indicate that considerable further increases in yield and NUE can be obtained by increasing effective soil N content and maize root length to promote post-silking N and DM accumulation in maize planted at high plant density, especially in fields with low soil fertility. | Baoyuan Zhou Xuefang Sun Dan Wang Zaisong Ding Congfeng Li Wei Ma Ming Zhao | 2019 | The Crop Journal2019，7，4： | 5 |
| 5 | A Joint TDOA/FDOA Localization Algorithm Using Bi-iterative Method with Optimal Step Length显示文摘In order to improve the estimation accuracy of multi-station joint Time difference of arrive/Frequency difference of arrive(TDOA/FDOA) location with Bi-Iterative method, a solution for the position of target with Gauss-Newton optimal step length is proposed in this paper. First, get the initial estimation of target based on Two-stage weighted least-squares(TSWLS)algorithm, and then alternately solve the position and velocity of the target with Bi-Iterative method. In this paper, Gauss-Newton method is applied to iteratively solve the target position, including the detailed equations of the descending direction and the optimal iterative step length in each iterative process. Simulations are carried out to examine the algorithm’s performance by comparing it with TSWLS method and Gauss-Newton method regardless of the step length. The results show that when Gauss noise variance is small, the estimation accuracy is close to Cramer Rao lower bound(CRLB) and the proposed method performs better than the other two methods. In addition, because the model which includes the position and velocity of the observation station and the target is in line with the over-the-horizon reality scene in this paper,our research has certain practical value. | LIU Congfeng YUN Jinwei | 2021 | Chinese Journal of Electronics2021，30，1： | 4 |
| 6 | Graded automorphism group of TKK algebra显示文摘The classification of extended affine Lie algebras of type A1 depends on the Tits-Kantor- Koecher (TKK) algebras constructed from semilattices of Euclidean spaces.One can define a unitary Jordan algebra J(S) from a semilattice S of Rv (v≥1),and then construct an extended affine Lie algebra of type A1 from the TKK algebra T(J(S)) which is obtained from the Jordan algebra J(S) by the so-called Tits-Kantor-Koecher construction.In R2 there are only two non-similar semilattices S and S′,where S is a lattice and S′is a non-lattice semilattice.In this paper we study the Z2-graded automorphisms of the TKK algebra T(J(S)). | YE CongFeng TAN ShaoBin | 2008 | Science China Mathematics2008，51，2： | 3 |
| 7 | The parametric symmetry and numbers of the entangled class of 2×M×N system显示文摘We present in the work two intriguing results in the entanglement classification of a pure and true tripartite entangled state of 2 × M × N under stochastic local operation and classical communication: (i) the internal symmetric properties of the nonlocal parameters in the continuous entangled class; (ii) the analytic expression for the total numbers of the true and pure entangled class 2 × M × N states. These properties help better understand the nature of the 2 × M × N entangled system. | LI XiKun LI JunLi LIU Bin QIAO CongFeng | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，8： | 2 |
| 8 | A new long-acting GLP-1 derivative KTP ameliorates hyperglycemia and dyslipidemia and improves pancreas and fatty liver in db/db mice显示文摘Glucagon-like peptide-1 (GLP-1) is a polypeptide incretin hormone that glucose-dependently promotes the secretion and synthesis of insulin. However, its half-life is extremely short. To enhance its half-life, we developed a long-acting GLP-1 derivative KTP with controlled release, designed on the basis of another GLP-1 derivative GP62. The kinetics and bioactivity of KTP were evaluated in Sprague Dawley (SD) rats. Long-term treatment of KTP was performed in db/db mice. Mice were treated twice daily with subcutaneous injections of KTP (1.2 mg/kg body weight), Exendin-4 (0.1 mg/kg body weight) or vehicle (phosphate buffered saline (PBS), pH 7.4) for 60 d. KTP had a longer half-life, as well as further increasing the secretion and production of insulin and reducing blood glucose concentrations, than GP62. Long-term treatment with KTP also induced anorexia, decreased water and food intake, decreased weight gain, improved blood glucose and blood lipid and ameliorated pancreatic damage and fatty liver in db/db mice. | SANG YanXia ZHOU TianHong LI HongJian RAN YanHong JIANG DeQi ZHENG Fei CHEN Ying WANG CongFeng ZOU Xin | 2013 | Chinese Science Bulletin2013，58，20： | 2 |
| 9 | New construction of hybrid and aperiodic ordered PBG cavity显示文摘The band gap of a photonic crystal (PhC) cavity intrinsically avoids HOM problems. In this paper, we present a new PBG structure based on the possible advantage of using hybrid structures and aperiodic lattices. This novel hybrid and aperiodically ordered cavity was designed for apparently higher Q-factor (more than 10300) and achieving large accelerating field gradient. The HOMs in the cavity are able to be absorbed efficiently. | ZHAO JingXiong WU CongFeng FAN Hao LI Bo DONG Sai | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，S2： | 2 |
| 10 | ISAR active jamming method based on sinusoidal modulation显示文摘It is potentially useful to perform deception or cover jamming using the rotating angular reflectors since they can form deception echoes along range and azimuth. Inspired by the coherent jamming and micro-motion modulation, a novel active method is proposed for inverse synthetic aperture radar(ISAR). Radar pulses are sampled and frequency-modulated along azimuth by sinusoidal signal, and then the jamming signals are retransmitted to the radar and the jamming images are induced after ISAR imaging.Therein, the jamming principle, key parameters and the jamming effect are discussed. The simulated data verify the effectiveness of the jamming method. | Yu Zhang Congfeng Liu Yan Zhu | 2015 | Journal of Systems Engineering and Electronics2015，26，4： | 1 |
| 11 | Evaluation of the proliferation and differentiation behaviors of mesenchymalstem cells with partially converted borate glass containing different amountsof strontium in vitro显示文摘 | Yi Zhu Yuanming Ouyang Yi Chang Congfeng Luo Jun Xu Changqing Zhang Wenhai Huang | 2013 | Molecular Medicine Reports2013，，4： | 1 |
| 12 | Robust capon beamformer under norm constraint显示文摘 | Liu Congfeng Liao Guisheng | | 0，，06： | 1 |
| 13 | POLYNOMIAL COEFFICIENT FINDING FOR ROOT-MUSIC显示文摘Root-MUSIC (MUltiple SIgnal Classification) is the polynomial rooting form of MUSIC, namely, the spectrum peak searching is resplaced by the polynomial rooting in MUSIC implementation. The coefficients finding of the polynomial is the critical problem for Root-MUSIC and its improvements. By analyzing the Root-MUSIC algorithm thoughly, the finding method of the polynomial coefficient is deduced and the concrete calculation formula is given, so that the speed of polynomial finding roots will get the bigger exaltation. The particular simulations are given and attest correctness of the theory analysis and also indicate that the proposed algorithm has preferable estimating performance. | Liu Xiaojun Liu Congfeng Liao Guisheng | 2009 | Journal of Electronics(China)2009，26，4： | 1 |
| 14 | Survey of susceptibilities to monosultap, triazophos, fipronil, and abamectin in Chilo suppressalis显示文摘 | HE Yueping GAO Congfeng CAO Mingzhang | 2007 | Journal of Economic Entomology2007，100，6： | 1 |
| 15 | A posterior inverted L-shaped approach for the treatment of posterior bicondylar tibial plateau fractures显示文摘 | Xianfeng He Penghan Ye Yong Hu Lei Huang Feng Zhang Guanyi Liu Yongping Ruan Congfeng Luo | 2013 | Archives of Orthopaedic and Trauma Surgery2013，，1： | 1 |
| 16 | Imidacloprid susceptibility survey and selection risk as- sessment in field populations of Nilaparvata lugens ( Ho- moptera: Delphacidae) 显示文摘 | WANG Yanhua GAO Congfeng ZHU Yucheng | 2008 | J Econ EntomL2008，101，： | 1 |
| 17 | Robust LCMP Beamformer with Negative Loading 显示文摘 | Liu Congfeng Yang Jie | 2012 | Progress in Electromagnetics Research2012，130，： | 1 |
| 18 | Effects of different continuous fertilizer managements on soil total nitrogen stocks in China: A meta-analysis显示文摘Soil total nitrogen is critical for crop productivity and related to agricultural managements. However, the effects of different fertilizer applications on soil total nitrogen storage are not well understood. To quantify soil total nitrogen storage under different fertilizer management practices and explore the effects of climate, soil texture, experimental duration, and cropping system on soil total nitrogen storage in China, we conducted a meta-analysis of 67 fertilizer management strategies from experiments conducted over a period of at least three years. This meta-analysis included 854 observations of changes in soil total nitrogen stock(TNS) under no fertilizer application(control, CK), chemical fertilization with nitrogen, phosphorus, and potassium(CF), CF plus straw retention(CFS), and CF plus manure addition(CFM) relative to initial soil TNS. The CFM and CFS treatments increased soil TNS, and the CFM treatments increased soil C/N ratio the most. The longer the experimental duration, the greater the increase in soil TNS in the CF, CFS, and CFM treatments.Soil texture and crop type significantly affected the changes in soil TNS. The experimental duration, initial soil TNS, soil C/N ratio, and cropping system had significant linear correlations with the change in soil TNS. Temperature and precipitation were not correlated with soil TNS. Results of random forest modeling indicated that the most important factor affecting changes in soil TNS was experimental duration(positive correlation), followed by initial soil TNS(negative correlation). The CFM treatments had the largest increase in soil TNS under various conditions. We recommend promoting CFM to improve soil fertility in farmlands globally. | Pengfei DANG Congfeng LI Tiantian HUANG Chen LU Yajun LI Xiaoliang QIN Kadambot H.M.SIDDIQUE | 2022 | Pedosphere2022，32，1： | 1 |
| 19 | Morphological characteristics of Schatzker type IV tibial plateau fractures:a computer tomography based study显示文摘 | Guang Yang Yi Zhu Congfeng Luo | 2012 | International Orthopaedics2012，36，11： | 1 |
| 20 | COMPARISON OF TDOA LOCATION ALGORITHMS WITH DIRECT SOLUTION METHOD显示文摘For Time Difference Of Arrival(TDOA) location based on multi-ground stations scene,two direct solution methods are proposed to solve the target position in TDOA location.Therein,the solving methods are realized in the rectangular and polar coordinates.On the condition of rectangular coordinates,first of all,it solves the radial range between the target and reference station,then cal-culates the location of the target.In the case of polar coordinates,the azimuth between the target and reference station is solved first,then the radial range between the target and reference station is figured out,finally the location of the target is obtained.Simultaneously,the simulation and comparison analysis are given in detail,and show that the polar solving method has the better fuzzy performance than that of rectangular coordinate. | Li Chun Liu Congfeng Liao Guisheng | 2011 | Journal of Electronics(China)2011，28，4： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员