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Lp-dual Quermassintegral sums

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science china mathematics 2007年第9期50卷 1347-1360页

作者： Chang-jian zhao department of information and mathematics sciences,college of science,china jiliang university,hangzhou 310018,china department of information and mathematics sciences College of Science China Jiliang University Hangzhou China

In this paper,we first introduce a concept of L_p-dual Quermassintegral sum function of convex bodies and establish the polar projection Minkowski inequality and the polar projection Aleksandrov-Fenchel inequality for L_p-dual Quermassintegral ***,by using Lutwak’s width-integral of index i,we establish the L_p-Brunn-Minkowski inequality for the polar mixed projec- tion *** applications,we prove some interrelated results.

关键词： mixed volumes mixed projection bodies dual Quermassintegral sum polar of mixed projection bodies 52A40 53A15

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凸体与星体混合的等周不等式

数学物理学报（A辑） 2019年第5期39卷 993-1000页

作者：赵长健中国计量大学理学院数学系

该文建立了凸体与星体混合的一个新的等周不等式.该不等式在特殊情况下产生了经典的等周不等式,并且给出了先前一个结果的改进和修正版本.

关键词：凸体星体混合体积对偶混合体积体积差等周不等式

Optimal disturbances rejection control for singularly perturbed systems with time-delay

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High Technology Letters 2008年第1期14卷 40-44页

作者：张宝琳 Tang Gongyou zhao Yandong college of science China Jiliang University Hangzhou 310018 P.R.China college of information science and Engineering Ocean University of China Qingdao 266100 P.R. China college of Automatic ＆ Electronic Engineering Qingdao Universisty of Science and Technology Qingdao 266071 P. R. China

The optimal control design for singularly perturbed time-delay systems affected by external distur-bances is *** on the decomposition theory of singular perturbation,the system is decom-posed into a fast subsystem without time-delay and a slow time-delay subsystem with *** disturbances rejection control law of the slow subsystem is obtained by using the successive ap-proximation approach(SAA)and feedforward compensation ***,the feedforward and feed-back composite control(FFCC)law for the original problem is *** FFCC law consists of lin-ear analytic terms and a time-delay compensation term which is the limit of the solution sequence of theadjoint vector equations.A disturbance observer is introduced to make the FFCC law physically *** examples show that the proposed algorithm is effective.

关键词： singularly perturbed systems time-delay optimal control feedforwad control successive approximation approach (SAA) disturbances observer

Ultrasensitive flexible broadband photodetectors achieving pA scale dark current

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npj Flexible Electronics 2017年第1期1卷 39-46页

作者： Xiao Luo Feiyu zhao Lili Du Wenli Lv Kun Xu Yingquan Peng Ying Wang Feiping Lu Institute of Microelectronics College of Optical and Electronic TechnologyChina Jiliang UniversityXueyuan Street 258#Hangzhou 310018China Institute of Microelectronics School of Physical Science and TechnologyLanzhou UniversitySouth Tianshui Road 222#Lanzhou 730000China college of information Engineering China Jiliang UniversityXueyuan Street 258#Hangzhou 310018China department of Physics Tianshui Normal UniversityTianshui 741001China

Organolead halide perovskite is a newly emerging low-cost,solution-processable material with a broadband absorption from the ultraviolet(UV)to visible(Vis)region,which has attracted a great deal of interest in high-performance optoelectronic ***,some practicable applications need a cover of UV–Vis–NIR region for photoelectric conversion,a task that remains a significant challenge for further extending the absorption toward the near-infrared radiation(NIR)***,to the best of our knowledge,we prove for the first time an ultrasensitive flexible broadband photodetector based on porous organolead perovskitephthalocyanine heterostructure,which combines the synergetic properties of high UV–Vis absorbance of perovskite with enhanced NIR absorption for triclinic lead *** photosensitivity of the as-prepared devices reaches up to 10^(4) at a low intensity of 10mWcm^(−2),which is among the largest values reported for broadband ***,performed at room temperature,the device achieves a pA scale dark current along with an ultrafast response speed of less than 0.6 ms for as-adopted full *** results provide an easy and promising route to develop low-cost,flexible and highly sensitive UV–Vis–NIR photodetectors.

关键词： optoelectronic absorption perovskite