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| 1 | Modeling the distribution of Populus euphratica in the Heihe River Basin, an inland river basin in an arid region of China显示文摘Populus euphratica is a dominant tree species in riparian Tugai forests and forms a natural barrier that maintains the stability of local oases in arid inland river basins. Despite being critical information for local environmental protection and recovery, establishing the specific spatial distribution of P. euphratica has rarely been attempted via precise and reliable species distribution models in such areas. In this research, the potential geographic distribution of P. euphratica in the Heihe River Basin was simulated with MaxEnt software based on species occurrence data and 29 environmental variables. The result showed that in the Heihe River Basin, 820 km^2 of land primarily distributed along the banks of the lower reaches of the river is a suitable habitat for P. euphratica. We built other MaxEnt models based on different environmental variables and another eight models employing different mathematical algorithms based on the same 29 environmental variables to demonstrate the superiority of this method.MaxEnt based on 29 environmental variables performed the best among these models, as it precisely described the essential characteristics of the distribution of P. euphratica forest land. This study verified that MaxEnt can serve as an effective tool for species distribution in extremely arid regions with sufficient and reliable environmental variables. The results suggest that there may be a larger area of P. euphratica forest distribution in the study area and that ecological conservation and management of P.euphratica should prioritize suitable habitat. This research provides valuable insights for the conservation and management of degraded P. euphratica riparian forests. | Yanlong GUO Xin LI Zefang ZHAO Haiyan WEI | 2018 | Science China Earth Sciences2018，61，11： | 12 |
| 2 | Radar Target Recognition Algorithm Based on RCS Observation Sequence——Set-Valued Identification Method显示文摘This paper studies the problem of radar target recognition based on radar cross section(RCS)observation sequence.First,the authors compute the discrete wavelet transform of RCS observation sequence and extract a valid statistical feature vector containing five components.These five components represent five different features of the radar target.Second,the authors establish a set-valued model to represent the relation between the feature vector and the authenticity of the radar target.By set-valued identification method,the authors can estimate the system parameter,based on which the recognition criteria is given.In order to illustrate the efficiency of the proposed recognition method,extensive simulations are given finally assuming that the true target is a cone frustum and the RCS of the false target is normally distributed.The results show that the set-valued identification method has a higher recognition rate than the traditional fuzzy classification method and evidential reasoning method. | WANG Ting BI Wenjian ZHAO Yanlong XUE Wenchao | 2016 | Journal of Systems Science & Complexity2016，29，3： | 7 |
| 3 | ADAPTIVE TRACKING OF A CLASS OF FIRST-ORDER SYSTEMS WITH BINARY-VALUED OBSERVATIONS AND FIXED THRESHOLDS显示文摘这份报纸为一阶的系统的一个班考虑适应追踪问题,珍视二进制代码的观察经由固定阀值产生了。一个递归的设计算法基于系统噪音的统计性质为参数评价被建议。然后,一条适应控制法律经由必然等价原则被设计。由关于估计的革新和输出预言的有条件的期望的使用,靠近环的系统被显示稳定、 asymptotically 最佳。同时,参数估计被证明肯定几乎是两个并且意味着平方会聚,并且评价错误的集中率也被获得。一个数字例子被给表明适应控制法律的效率。 | Jin GUO Ji-Feng ZHANG Yanlong ZHAO | 2012 | Journal of Systems Science & Complexity2012，25，6： | 6 |
| 4 | Iterative parameter estimate with batched binary-valued observations显示文摘In this paper, we consider linear system identification with batched binary-valued observations.We constructed an iterative parameter estimate algorithm to achieve the maximum likelihood(ML) estimate.The first interesting result was that there exists at most one finite ML solution for this specific maximum likelihood problem, which was induced by the fact that the Hessian matrix of the log-likelihood function was negative definite under binary data and Gaussian system noises. The global concave property and local strongly concave property of the log-likelihood function were obtained. Under mild conditions on the system input, we proved that the ML function has a unique maximum point. The second main result was that the ML estimate was consistent under persistent excitation inputs, which infers the effectiveness of ML estimate. Finally, the proposed iterative estimate algorithm converged to a fixed vector with an exponential rate that was proved by constructing a Lyapunov function. A more interesting result was that the limit of the iterative algorithm achieved the maximization of the ML function. Numerical simulations are illustrated to support the theoretical results obtained in this paper well. | Yanlong ZHAO Wenjian BI Ting WANG | 2016 | Science China(Information Sciences)2016，59，5： | 5 |
| 5 | Structure insights into mechanisms of ATP hydrolysis and the activation of human heat-shock protein 90显示文摘分子的女伴热吃惊蛋白质 90 的激活(Hsp90 ) 依赖于 ATP 绑定和水解作用,它发生在蛋白质的 N 终端域。这里,我们与 ATP 和 ATP 类似物在土著人并且在建筑群决定了人的 Hsp90 的 N 终端领域的三水晶结构,提供由 Hsp90 的 ATP 水解作用的催化机制的一个清楚的看法。另外, ATP 的绑定导致 N 终端领域是能被用来部分解释 Hsp90 的孤立的 N 终端领域为什么举办很弱的 ATP hydrolytic 活动的一个中间的状态。 | Jian Li Lihua Sun Chunyan Xu Feng Yu Huan Zhou Yanlong Zhao Jian Zhang Jianhua Cai Cheney Mao Lin Tang Yechun Xu Jianhua He | 2012 | Acta Biochimica et Biophysica Sinica2012，44，4： | 5 |
| 6 | Asymptotically efficient non-truncated identification for FIR systems with binary-valued outputs显示文摘Dear editor, Recently,set-valued observations have increasingly emerged in practical fields owing to limited communication resources [1].Numerous set-valued sensors,such as switching sensors for exhaust gas oxygen and pressure switches have proliferated because of their cost economy [2]. | Ting WANG Jianwei TAN Yanlong ZHAO | 2018 | Science China(Information Sciences)2018，61，12： | 5 |
| 7 | Consensus Control With a Constant Gain for Discrete-time Binary-valued Multi-agent Systems Based on a Projected Empirical Measure Method显示文摘This paper studies the consensus control of multiagent systems with binary-valued observations.An algorithm alternating estimation and control is proposed.Each agent estimates the states of its neighbors based on a projected empirical measure method for a holding time.Based on the estimates,each agent designs the consensus control with a constant gain at some skipping time.The states of the system are updated by the designed control,and the estimation and control design will be repeated.For the estimation,the projected empirical measure method is proposed for the binary-valued observations.The algorithm can ensure the uniform boundedness of the estimates and the mean square error of the estimation is proved to be at the order of the reciprocal of the holding time(the same order as that in the case of accurate outputs).For the consensus control,a constant gain is designed instead of the stochastic approximation based gain in the existing literature for binary-valued observations.And,there is no need to make modification for control since the uniform boundedness of the estimates ensures the uniform boundedness of the agents’states.Finally,the systems updated by the designed control are proved to achieve consensus and the consensus speed is faster than that in the existing literature.Simulations are given to demonstrate the theoretical results. | Ting Wang Min Hu Yanlong Zhao | 2019 | IEEE/CAA Journal of Automatica Sinica2019，6，4： | 4 |
| 8 | Identification of the gain system with quantized observations and bounded persistent excitations显示文摘System identification with quantized observations and persistent excitations is a fundamental and difcult problem.As the first step,this paper takes the gain system for example to investigate the identification with quantized observations and bounded persistently exciting inputs.Firstly,the identification with single threshold quantization is considered.A projection recursive algorithm is proposed to estimate the unknown parameter.By use of the conditional expectation of quantized observations with respect to the estimates,the algorithm is shown to be both mean-square and almost surely convergent.The upper bound of the convergence rate is also obtained,which has the same order as the one of the optimal estimation in the case where the system output is exactly known.Secondly,for the multi-threshold quantization,the identification algorithm is similarly constructed and its asymptotic property is analyzed.Using a multi-linear transformation,the optimal scheme of quantization values and thresholds is given.A numerical example is simulated to demonstrate the efectiveness of the algorithms and the main results obtained. | GUO Jin ZHAO YanLong | 2014 | Science China(Information Sciences)2014，57，1： | 4 |
| 9 | FIR system identification with set-valued and precise observations from multiple sensors显示文摘This paper considers the system identification problem for FIR(finite impulse response) systems with set-valued and precise observations received from multiple sensors. A fusion estimation algorithm based on some suitable identification algorithms for different types of observations is proposed. In particular, least square method is chosen for FIR systems with precise observations, while empirical measure method and EM algorithm are chosen for FIR systems with set-valued observations in the cases of periodic and general system inputs, respectively. Then, the quasi-convex combination estimator(QCCE) fusing the two different estimators by a linear combination with appropriate weights is constructed. Furthermore, the convergence properties are theoretically analyzed in terms of strong consistency and asymptotic efficiency. The fused estimator QCCE is proved to achieve the Cram′er-Rao(CR) lower bound asymptotically under periodic inputs. Extensive numerical simulations validate the superiority of the fusion estimation algorithm under both periodic and general inputs. | Hang ZHANG Ting WANG Yanlong ZHAO | 2019 | Science China(Information Sciences)2019，62，5： | 3 |
| 10 | Speciation evolutions of target metals (Cd, Pb) influenced by chlorine and sulfur during sewage sludge incineration显示文摘在污泥焚化,重金属的热行为是一颗成长担心。在这个工作,在有约束力的精力划分在蒸汽阶段和压缩阶段,在压缩阶段的种形成再分配和金属种类的差别之间的行为的金属的联合分析被执行在高温度的污泥焚化调查重金属的可能的挥发冷凝作用机制。在金属挥发有二步,这被发现。重金属的起始的挥发发源从他们的可交换(EXC ) ,碳酸盐界限(汽车) 和部分,它是首先简单物质,氯化物,氧化物和硫化物填写了的铁锰界限(FM ) 。随在污泥的氯和硫的增加,重金属的内部种形成再分配在压缩阶段发生了,它是影响重金属的潜在的轻快的一个重要因素。有 complexed (COM ) 和部分逐渐地分解了成简单物质或离子,氧化物和碳酸盐的剩余(物件) 的金属种类部分的 A,它显著地加强了第二轻快。在氯的存在,当 Cd 的轻快率增加了 44.89% 时,有 RES 部分的大约 46% Cd 消失了。而且,当处于挥发率有将近 10% 的增加时,有 COM 部分的大约 9% Pb 消失了。因此,第二挥发被金属种类的分解主要与 COM 和物件部分控制。由 XRD 分析和有约束力的精力计算的优点,它被发现那金属复杂,硅酸盐被使倾向作为与硫酸盐相比由于差的 thermo 稳定性在高温度下面分解。 | Jingde LUAN Rundong LI Zhihui ZHANG Yanlong LI Yun ZHAO | 2014 | Frontiers of Environmental Science & Engineering2014，8，6： | 3 |
| 11 | Recent advances in multifunctional electrochromic energy storage devices and photoelectrochromic devices显示文摘Multifunctional devices integrated with electrochromism and energy storage or energy production functions are attractive because these devices can be used as an effective approach to address the energy crisis and environmental pollution in society today. In this review, we explain the operation principles of electrochromic energy storage devices including electrochromic supercapacitors,electrochromic batteries, and the photoelectrochromic devices. Furthermore, the material candidates and structure types of these multifunctional devices are discussed in detail. The major challenges of these devices along with a further outlook are highlighted at the end. | Zhongqiu Tong Yanlong Tian Hongming Zhang Xingang Li Junyi Ji Huiying Qu Na Li Jiupeng Zhao Yao Li | 2017 | Science China Chemistry2017，60，1： | 3 |
| 12 | Parameter estimates of Heston stochastic volatility model with MLE and consistent EKF algorithm显示文摘Heston model is the most famous stochastic volatility model in finance. This paper considers the parameter estimation problem of Heston model with both known and unknown volatilities. First, parameters in equity process and volatility process of Heston model are estimated separately since there is no explicit solution for the likelihood function with all parameters. Second, the normal maximum likelihood estimation(NMLE) algorithm is proposed based on the It?o transformation of Heston model. The algorithm can reduce the estimate error compared with existing pseudo maximum likelihood estimation. Third, the NMLE algorithm and consistent extended Kalman filter(CEKF) algorithm are combined in the case of unknown volatilities. As an advantage, CEKF algorithm can apply an upper bound of the error covariance matrix to ensure the volatilities estimation errors to be well evaluated. Numerical simulations illustrate that the proposed NMLE algorithm works more efficiently than the existing pseudo MLE algorithm with known and unknown volatilities. Therefore, the upper bound of the error covariance is illustrated. Additionally, the proposed estimation method is applied to American stock market index S&P 500, and the result shows the utility and effectiveness of the NMLE-CEKF algorithm. | Ximei WANG Xingkang HE Ying BAO Yanlong ZHAO | 2018 | Science China(Information Sciences)2018，61，4： | 3 |
| 13 | Research on ultra-small textured surface of multicrystalline silicon solar cell显示文摘The ultra-small textured surface of multicrystalline silicon solar cell,prepared by electroless chemical-etching method,shows an excellent anti-reflection property over a wide spectral bandwidth.A novel back surface protection method and front surface passivation method have been used in the multicrystalline solar cells with ultra-small textured surfaces.With these improvements,the back surface remains intact after the etch process and the efficient minority lifetime is apparently increased.The test result shows that the solar cell with ultra-small textured surface can obtain better electrical performances by these improvements. | LI HaoFeng JIA Rui DOU BingFei CHEN Chen XING Zhao YANG YongZhou DING WuChang MENG YanLong LIU XinYu YE TianChun LI ShangQing | 2013 | Science China(Technological Sciences)2013，56，4： | 2 |
| 14 | Information Security Protocol Based System Identification with Binary-Valued Observations显示文摘 | XU Changbao ZHAO Yanlong ZHANG Ji-Feng | 2018 | Journal of Systems Science & Complexity2018，31，4： | 2 |
| 15 | Adaptive control with saturation-constrainted observations for drag-free satellites——a set-valued identification approach显示文摘The high-accuracy drag-free control is one of the key technologies for gravity gradient satellites.Since the range of the gravity gradiometer is limited,the measurement is subject to the saturation constraint.This paper introduces a design method of the adaptive drag-free control law by employing the set-valued identification approach.By inserting several thresholds in the constrained interval,the output observation is transformed into the set-valued information under different thresholds,based on which and the weighted optimization technique the identification algorithm for the unknown parameter is constructed.The adaptive drag-free control law is designed via the certainty equivalence principle.It is shown that the identification algorithm is strongly convergent and the convergence rate of the estimation error is obtained.The performance of the closed-loop system is analyzed,and the asymptotic optimality of the adaptive controller is proved.The numerical simulation is included to verify the effectiveness of the main results. | Shuping TAN Jin GUO Yanlong ZHAO Jifeng ZHANG | 2021 | Science China(Information Sciences)2021，64，10： | 2 |
| 16 | Stable carbon isotopes in the shell of Corbicula fluminea (Müller 1774): Implications for understanding environmental changes in drainage basins显示文摘Dissolved inorganic carbon (DIC) is a primary constituent of the aquatic geochemistry of terrestrial ecosystems. Changes in DIC concentration and its isotopic composition are closely associated with environmental changes in the drainage basin. Thus, a better understanding of DIC may lead to improved characterization of environmental changes. Corbicula fluminea (Müller 1774), a bivalve native to southeast Asia and a dominant invasive species in many aquatic environments around the world, has the poten-tial to record DIC information, particularly because of its sequential skeletal deposition. Analysis of the stable carbon isotope composition (δ 13C) of the shell and the aquatic DIC in the Xijiang River drainage basins in southern and western China allowed us to determine that changes in δ 13C in the skeleton significantly correlated with those of DIC (P < 0.01, r = 0.63). These results indicate that the isotopic signature of the shell reflects that δ 13C of the DIC in ambient water. The temporal resolution was at the seasonal scale. Metabolic effect does not change the co-variation, even though it makes the shell δ 13C 1.4‰ lower statistically than that of DIC. δ 13C of DIC in creeks of some watershed areas may experience large temporal changes characterization of these changes requires high sampling resolution of the shell. This problem makes the clams in these areas less preferable for reconstruc-tion of environmental changes. The present findings provide the basis for recovering paleoenvironmental changes and carbon cycles in a watershed through analysis of fossil shells of C. fluminea, which are common in some lacustrine and/or riverine sedi-ment sequences. | ZHOU Hui LIU CongQiang JIANG Qian JIANG Wei ZHAO YanLong DING WenCi YAN Hui | 2010 | Chinese Science Bulletin2010，55，36： | 2 |
| 17 | Credit Scoring Based on the Set-Valued Identification Method显示文摘Credit scoring is one of the key problems in financial risk managements.This paper studies the credit scoring problem based on the set-valued identification method,which is used to explain the relation between the individual attribute vectors and classification for the credit worthy and credit worthless lenders.In particular,system parameters are estimated by the set-valued identification algorithm based on a given recognition criteria.In order to illustrate the efficiency of the proposed method,practical experiments are conducted for credit card applicants of Australia and credit card holders from Taiwan,respectively.The empirical results show that the set-valued model has a higher prediction accuracy on both small and large numbers of data set compared with logistic regression model.Furthermore,parameters estimated by the set-valued identification method are more stable,which provide a meaningful and logical explanation for extracting factors that influence the borrowers’credit scorings. | WANG Ximei HU Min ZHAO Yanlong DJEHICHE Boualem | 2020 | Journal of Systems Science & Complexity2020，33，5： | 2 |
| 18 | Variations in growth traits and wood physicochemical properties among Pinus koraiensis families in Northeast China显示文摘This study aimed to explore and improve the different economic values of Pinus koraiensis(Siebold and Zucc.)by examining the variations in 6 growth traits and 9 physicochemical wood properties among 53 P.koraiensis half-sib families.Growth traits assessed included height,diameter at breast height,volume,degree of stem straight-ness,stem form,and branch number per node,while wood properties assessed included density,fiber length and width,fiber length to width ratio,and cellulose,hemicel-lulose,holocellulose,lignin,and ash contents.Except for degree of stem straightness and branch number per node,all other traits exhibited highly significant variations(P<0.01)among families.The coefficients of variation ranged from 5.3(stem form)to 66.7%(ash content),whereas,the herit-ability ranged from 0.136(degree of stem straightness)to 0.962(ash content).Significant correlations were observed among growth traits and wood physicochemical properties.Principal component analysis identified four distinct groups representing growth traits,wood chemical and physical properties,and stem form traits.Multi-trait comprehensive evaluation identified three groups of elite families based on breeding objectives,including rapid growth,improved timber production for building and furniture materials,and pulpwood production.These specific families should be used to establish new plantations. | Qinhui Zhang Xiaona Pei Xianbo Lu Chunli Zhao Guangzhi Dong Wanling Shi Liankui Wang Yanlong Li Xiyang Zhao Mulualem Tigabu | 2022 | Journal of Forestry Research2022，33，5： | 1 |
| 19 | Retrieval of total suspended matter from MODIS 250 m imagery in the Bohai Sea of China显示文摘 | Lin Wang Dongzhi Zhao Jianhong Yang Yanlong Chen | 2012 | Journal of Oceanography2012，，5： | 1 |
| 20 | Clinical Pathologic Study on Effect of Qianggan Capsule (强肝胶囊) in Treating Patients of Chronic Hepatitis B with Liver Cirrhosis显示文摘Objective: To explore the clinical therapeutic effect of Qianggan Capsule (QGC) in treating chronic hepatitis B with liver fibrosis from the pathological aspect. Methods: Sixty three patients of chronic hepatitis B with liver fibrosis were randomly divided into the treated group (n=45) and the control group (n=18). Both groups were treated with general liver protective drugs, such as Glucurone and vitamins B complex for 6 months. To the treated group, QGC was used additionally. The levels of serum alanine transaminase and liver fibrosis indexes including hyaluronic acid (HA), collagen type Ⅳ (C Ⅳ) and laminin (LN) as well as the pathological examination of liver biopsy were observed before and after treatment. Results: The liver cirrhosis indexes, HA, C Ⅳ and LN, were improved significantly in the treated group after treatment, P <0.05. The liver function improvement rate in the treated group and the control group was 90.3% and 66.7% respectively, comparison of the two groups showed insignificant difference, P >0.05. Pathological examination showed that the effective rate of treatment on liver inflammatory necrosis activity grade in the treated group was 57.8% and that on liver fibrosis stage was 75.6%, which were significantly improved as compared with those before treatment ( P <0.05 and P <0.01), while in the control group, no significant improvement was found after treatment ( P >0.05). Conclusion: QGC has marked effects in reversing liver fibrosis and alleviating hepatic inflammatory necrosis in patients of chronic hepatitis B with liver fibrosis, and could lower the serum liver fibrosis related indexes effectively. | YANG Liuming(杨柳明) ZHAO Yanlong(赵延龙) WU Zhirong(吴志荣) CHEN Dufang(陈杜芳) CHEN Zhuoying(岑卓英) XU Kecheng(徐克成) ZUO Jiansheng(左建生) WEI Beihai(危北海) ZHANG Wandai(张万岱) | 2002 | Chinese Journal of Integrative Medicine2002，8，2： | 1 |
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