期刊文献+
共找到12篇文章
< 1 >
每页显示 20 50 100
Asymptotic properties of a nonparametric conditional density estimator in the local linear estimation for functional data via a functional single-index model
1
作者 Fadila Benaissa Abdelmalek Gagui Abdelhak Chouaf 《Statistical Theory and Related Fields》 2022年第3期208-219,共12页
This paper deals with the conditional density estimator of a real response variable given a functional random variable(i.e.,takes values in an infinite-dimensional space).Specifically,we focus on the functional index ... This paper deals with the conditional density estimator of a real response variable given a functional random variable(i.e.,takes values in an infinite-dimensional space).Specifically,we focus on the functional index model,and this approach represents a good compromise between nonparametric and parametric models.Then we give under general conditions and when the variables are independent,the quadratic error and asymptotic normality of estimator by local linear method,based on the single-index structure.Finally,wecomplete these theoretical advances by some simulation studies showing both the practical result of the local linear method and the good behaviour for finite sample sizes of the estimator and of the Monte Carlo methods to create functional pseudo-confidence area. 展开更多
关键词 Mean squared error single functional index conditional density function nonparametric estimation local linear estimation asymptotic normality functional data
原文传递
P33 of Helicoverpa armigera single nucleocapsid nucleopolyhedrovirus is a functional homolog of AcP33 被引量:1
2
作者 Wenhua Kuang Huanyu Zhang +4 位作者 Dianhai Hou Manli Wang Fei Deng Hualin Wang Zhihong Hu 《Virologica Sinica》 SCIE CAS CSCD 2016年第4期346-349,共4页
Dear Editor,Baculoviruses are insect-specific viruses with a circular double-stranded DNA genome ranging in size from80–180 kb(Lu et al.,2012).Two distinct types of virions have been identified during the infectious ... Dear Editor,Baculoviruses are insect-specific viruses with a circular double-stranded DNA genome ranging in size from80–180 kb(Lu et al.,2012).Two distinct types of virions have been identified during the infectious cycle of baculoviruses,namely budded virions(BVs)and occlusion-derived virions(ODVs).BVs mediate infection from cell to cell,while ODVs initiate oral infection in the insect midgut(Braunagel and Summers,2007). 展开更多
关键词 P33 of Helicoverpa armigera single nucleocapsid nucleopolyhedrovirus is a functional homolog of AcP33 Figure NPV
原文传递
Non-fragile Dynamic Output Feedback H∞Control for a Class of Un­certain Switched Systems with Time-varying Delay 被引量:2
3
作者 Yuning Song Yuzhong Liu 《Journal of Electronic & Information Systems》 2021年第1期1-6,共6页
The problem of non-fragile dynamic output feedback H∞control for a class of uncertain switched systems with time-varying delay is discussed.Firstly,the form of non-fragile dynamic output feedback H∞controller is giv... The problem of non-fragile dynamic output feedback H∞control for a class of uncertain switched systems with time-varying delay is discussed.Firstly,the form of non-fragile dynamic output feedback H∞controller is given.Under the condition that the upper bound of time delay and the upper bound of delay derivative are limited simultaneously,Lyapunov functional and its corresponding switching rules are constructed by using single Lyapunov function method and convex combination technique;Secondly,we use the inequality lemma to scale the derived Lyapunov functional in order to eliminate the time-varying delay term in the in­equality,and then introduce the J-function to obtain a nonlinear matrix in­equality that satisfies the H∞performance indexγ,we also employ Schur complement lemma to transform the nonlinear matrix inequality into set of linear matrix inequalities consisting of two linear matrix inequalities,a sufficient condition for the existence of a non-fragile dynamic output feedback H∞controller and satisfying the H∞performance indexγis concluded for a class of uncertain switching systems with variable time delay;Finally,a switched system composed of two subsystems is consid­ered and the effectiveness and practicability of the theorem are illustrated by numerical simulation with LMI toolbox. 展开更多
关键词 single Lyapunov function Uncertainty H_(∞)control NON-FRAGILE Output feedback
下载PDF
H-infinity control for cascade minimum-phase switched nonlinear systems
4
作者 Shengzhi ZHAO Jun ZHAO 《控制理论与应用(英文版)》 EI 2005年第2期163-167,共5页
This paper is concerned with the H-infinity control problem for a class of cascade switched nonlinear systems. Each switched system in this class is composed of a zero-mput asymptotically stable nonlinear part, which ... This paper is concerned with the H-infinity control problem for a class of cascade switched nonlinear systems. Each switched system in this class is composed of a zero-mput asymptotically stable nonlinear part, which is also a switched system, and a linearizable part which is controllable. Conditions under which the H-infinity control problem is solvable under arbitrary switching law and under some designed switching law are derived respectively. The nonlinear state feedback and switching law are designed. We exploit the structural characteristics of the switched nonlinear systems to construct common Lyapunov functions for arbitrary switching and to find a single Lyapunov function for designed switching law. The proposed methods do not rely on the solutions of Hamilton-Jacobi inequalities. 展开更多
关键词 Switched nonlinear systems H-infinity control Common Lyapunov functions single Lyapunov functions
下载PDF
A compact model for single material double work function gate MOSFET
5
作者 郑长勇 张伟 +2 位作者 徐太龙 代月花 陈军宁 《Journal of Semiconductors》 EI CAS CSCD 2013年第9期58-62,共5页
An analytical surface potential model for the single material double work function gate (SMDWG) MOSFET is developed based on the exact resultant solution of the two-dimensional Poisson equation. The model includes t... An analytical surface potential model for the single material double work function gate (SMDWG) MOSFET is developed based on the exact resultant solution of the two-dimensional Poisson equation. The model includes the effects of drain biases, gate oxide thickness, different combinations of S-gate and D-gate length and values of substrate doping concentration. More attention has been paid to seeking to explain the attributes of the SMDWG MOSFET, such as suppressing drain-induced barrier lowering (DIBL), accelerating carrier drift velocity and device speed. The model is verified by comparison to the simulated results using the device simulator MEDICI. The accuracy of the results obtained using our analytical model is verified using numerical simulations. The model not only offers the physical insight into device physics but also provides the basic designing guideline for the device. 展开更多
关键词 analytical model surface potential single material double work function gate (SMDWG) MOSFET simulation DIBL
原文传递
Surgical outcomes of functional single ventricle with total anomalous pulmonary venous connection
6
作者 OU Yan-qiu LIU Xiao-bing +1 位作者 CEN Jian-zheng LIU Xiao-qing 《South China Journal of Cardiology》 CAS 2020年第1期38-46,52,共10页
Background The surgical outcomes have been greatly improved over the past four decades for functional single ventricle(FSV). However,the repair for coexistence of FSV and total anomalous pulmonary venous connection(TA... Background The surgical outcomes have been greatly improved over the past four decades for functional single ventricle(FSV). However,the repair for coexistence of FSV and total anomalous pulmonary venous connection(TAPVC),especially obstructed TAPVC,has remained a clinical challenge. Little is known about the results of surgical treatment for patients with FSV-TAPVC in China. Methods Forty consecutive patients with FSV-TAPVC undergoing initial surgical palliation(median age:16.8 months;body weight:8.25 kg)were retrospectively enrolled from 2006 to 2016 in a specialized cardiovascular institute. TAPVC was repaired in 30 patients. The mean follow-up period was 49 months. Results All of the 7 patients with preoperative pulmonary vein obstruction(PVO)underwent repair of TAPVC at the first operation and survived. When a systemic to pulmonary(S-P)shunt or pulmonary artery banding(PAB)was necessary,patients with concomitant TAPVC repair had lower mortality(30.0%)and higher total cavopulmonary connection completion rate(20.0%)than those without TAPVC repair[75.0% and 0%,respectively],although with no statistical significance(Fisher test,P=0.505 and P=0.245). The overall survival rates for the cohort at 1,3 and 5 years after the initial surgical intervention were 80.0%,77.1% and 77.1%,respectively. Multivariate COX regression analysis detected that SP shunt(adjusted odds ratio:6.51;95%CI:1.26-33.71,P=0.030)is the only risk factor for survival. The reintervention rate for postoperative PVO was higher in patients with preoperative PVO than those without(57.1%vs. 4.3%,Log Rank:P=0.006). Conclusion The mid-term results of surgical repair of FSV-TAPVC are still challenging. When PVO exists,surgical repair for TAPVC is suggested as soon as possible. Repair for TAPVC should also be considered when S-P shunt or PAB is necessary. Further study with larger population are warranted to support our finding. 展开更多
关键词 congenital heart defects functional single ventricle total anomalous pulmonary venous connection sutureless technique
原文传递
SoySNP618K array:A high-resolution single nucleotide polymorphism platform as a valuable genomic resource for soybean genetics and breeding
7
作者 Yan-Fei Li Ying-Hui Li +14 位作者 Shan-Shan Su Jochen CReif Zhao-Ming Qi Xiao-Bo Wang Xing Wang Yu Tian De-Lin Li Ru-Jian Sun Zhang-Xiong Liu Ze-Jun Xu Guang-Hui Fu Ya-Liang Ji Qing-Shan Chen Ji-Qiang Liu Li-Juan Qiu 《Journal of Integrative Plant Biology》 SCIE CAS CSCD 2022年第3期632-648,共17页
Innovations in genomics have enabled the development of low-cost,high-resolution,single nucleotide polymorphism(SNP)genotyping arrays that accelerate breeding progress and support basic research in crop science.Here,w... Innovations in genomics have enabled the development of low-cost,high-resolution,single nucleotide polymorphism(SNP)genotyping arrays that accelerate breeding progress and support basic research in crop science.Here,we developed and validated the Soy SNP618 K array(618,888 SNPs)for the important crop soybean.The SNPs were selected from whole-genome resequencing data containing 2,214 diverse soybean accessions;29.34%of the SNPs mapped to genic regions representing 86.85%of the 56,044annotated high-confidence genes.Identity-by-state analyses of 318 soybeans revealed 17 redundant accessions,highlighting the potential of the Soy SNP618 K array in supporting gene bank management.The patterns of population stratification and genomic regions enriched through domestication were highly consistent with previous findings based on resequencing data,suggesting that the ascertainment bias in the Soy SNP618 K array was largely compensated for.Genome-wide association mapping in combination with reported quantitative trait loci enabled fine-mapping of genes known to influence flowering time,E2 and Gm PRR3 b,and of a new candidate gene,Gm VIP5.Moreover,genomic prediction of flowering and maturity time in 502 recombinant inbred lines was highly accurate(>0.65).Thus,the Soy SNP618 K array is a valuable genomic tool that can be used to address many questions in applied breeding,germplasm management,and basic crop research. 展开更多
关键词 functional single nucleotide polymorphism array gene discovery genomic selection genome-wide association studies marker-assisted selection SOYBEAN
原文传递
Safety stabilization of switched systems with unstable subsystems 被引量:2
8
作者 Lijun Long Yiguang Hong 《Control Theory and Technology》 EI CSCD 2022年第1期95-102,共8页
This paper is concerned with the problem of safety stabilization for switched systems where the solvability of the problem under study for individual subsystems is not assumed.A new state-dependent switching strategy ... This paper is concerned with the problem of safety stabilization for switched systems where the solvability of the problem under study for individual subsystems is not assumed.A new state-dependent switching strategy with guaranteed dwell-time for switched systems is constructed,and a sufficient condition for absence of Zeno behavior is derived.Also,a novel switched control design method is proposed to simultaneously guarantee the safety of the switched closed-loop system and stabilize the system based on the union of a common barrier function and a single Lyapunov function,which effectively handles the conflict between safety and stability objectives.Finally,two examples are presented to demonstrate the effectiveness of the proposed design approach. 展开更多
关键词 Safety stabilization Switched systems Common barrier function single Lyapunov function State-dependent switching
原文传递
New Exact Solutions of Time Fractional Gardner Equation by Using New Version of F-Expansion Method 被引量:10
9
作者 Yusuf Pandir Hasan Huseyin Duzgun 《Communications in Theoretical Physics》 SCIE CAS CSCD 2017年第1期9-14,共6页
In this article, we consider analytical solutions of the time fractional derivative Gardner equation by using the new version of F-expansion method. With this proposed method multiple Jacobi elliptic functions are sit... In this article, we consider analytical solutions of the time fractional derivative Gardner equation by using the new version of F-expansion method. With this proposed method multiple Jacobi elliptic functions are situated in the solution function. As a result, various exact analytical solutions consisting of single and combined Jacobi elliptic functions solutions are obtained. 展开更多
关键词 new version of F-expansion method nonlinear differential equations with fractional derivatives single and combined Jacobi elliptic functions solutions
原文传递
Stability Analysis and Anti-windup Design of Switched Systems with Actuator Saturation 被引量:1
10
作者 Xin-Quan Zhang Xiao-Yin Li Jun Zhao 《International Journal of Automation and computing》 EI CSCD 2017年第5期615-625,共11页
The stability analysis and anti-windup design problem is investigated for two linear switched systems with saturating actuators by using the single Lyapunov function approach. Our purpose is to design a switching law ... The stability analysis and anti-windup design problem is investigated for two linear switched systems with saturating actuators by using the single Lyapunov function approach. Our purpose is to design a switching law and the anti-windup compensation gains such that the maximizing estimation of the domain of attraction is obtained for the closed-loop system in the presence of saturation. Firstly, some sufficient conditions of asymptotic stability are obtained under given anti-windup compensation gains based on the single Lyapunov function method. Then, the anti-windup compensation gains as design variables are presented by solving a convex optimization problem with linear matrix inequality (LMI) constraints. Two numerical examples are given to show the effectiveness of the proposed method. 展开更多
关键词 ANTI-WINDUP switched systems saturating actuators single Lyapunov function domain of attraction linear matrixinequality (LMI).
原文传递
Fuzzy adaptive tracking control within the full envelope for an unmanned aerial vehicle 被引量:3
11
作者 Liu Zhi Wang Yong 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2014年第5期1273-1287,共15页
Motivated by the autopilot of an unmanned aerial vehicle(UAV) with a wide flight envelope span experiencing large parametric variations in the presence of uncertainties, a fuzzy adaptive tracking controller(FATC) ... Motivated by the autopilot of an unmanned aerial vehicle(UAV) with a wide flight envelope span experiencing large parametric variations in the presence of uncertainties, a fuzzy adaptive tracking controller(FATC) is proposed. The controller consists of a fuzzy baseline controller and an adaptive increment, and the main highlight is that the fuzzy baseline controller and adaptation laws are both based on the fuzzy multiple Lyapunov function approach, which helps to reduce the conservatism for the large envelope and guarantees satisfactory tracking performances with strong robustness simultaneously within the whole envelope. The constraint condition of the fuzzy baseline controller is provided in the form of linear matrix inequality(LMI), and it specifies the satisfactory tracking performances in the absence of uncertainties. The adaptive increment ensures the uniformly ultimately bounded(UUB) predication errors to recover satisfactory responses in the presence of uncertainties. Simulation results show that the proposed controller helps to achieve high-accuracy tracking of airspeed and altitude desirable commands with strong robustness to uncertainties throughout the entire flight envelope. 展开更多
关键词 Flight control systems Full flight envelope Fuzzy adaptive tracking control Fuzzy multiple Lyapunov function Fuzzy T–S model single hidden layer neural network
原文传递
Another Definition of Order-Sorted Algebra
12
作者 何自强 《Journal of Computer Science & Technology》 SCIE EI CSCD 1998年第6期547-547,共1页
In this paper the definition of order-sorted algebra is generalized by introducing transforma-tion functions between subtypes and supertypes. According to our definition, a type needn'tbe a subset of its supertype... In this paper the definition of order-sorted algebra is generalized by introducing transforma-tion functions between subtypes and supertypes. According to our definition, a type needn'tbe a subset of its supertype and a record model may form an order-sorted algebra. A newdefinition of equation is given. It has also been proved that equational theories and describingsingle inheritance have the initial model. 展开更多
关键词 Order-sorted algebra equational theory initial model single inheritance transformation function.
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部