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Simplified Method for Joint Calibration of 3d Ladar and Monocular Camera

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Journal of Beijing Institute of Technology 2018年第3期27卷 319-325页

作者： Jing Li Liuzhi yu Junzheng Wang Key Laboratory of Intelligent Control and decision of Complex Systems School of AutomationBeijing Institute of Technology

To address the problem of data fusion between monocular camera image with 3 d data from laser detection and ranging(LAdAR)sensor,this paper proposes a novel simplified scheme based on the planar feature method,which can meet the accuracy requirements of the joint calibration with fewer checkerboard calibration plate(CP)positions than traditional ***,a mathematical model of the joint calibration is established to obtain the calibration ***,the selection of positions and orientations of the CP are introduced and the corresponding influence to the calibration is ***,the calibration result is optimized by using a nonlinear Levenberg-Marquardt(LM)optimization approach,and the distance residual method is utilized to estimate the ***,experimental results conclude that the minimum number of positions required to meet the joint calibration accuracy in the proposed method is 5,which is less than 12 in traditional methods.

关键词： 3d LAdAR monocular camera joint calibration plane calibration method distance residual

三维显示图像的串扰评价方法与理论建模(特邀)

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激光与光电子学进展 2024年第16期61卷 166-174页

作者：邢树军聂子涵张泷于迅博高鑫桑新柱颜玢玢北京邮电大学深圳研究院广东深圳518057 北京邮电大学电子工程学院北京100876

裸眼三维(3d)显示技术可使观众无须佩戴眼镜就可以观看到具有立体效果的图像,是3d显示领域研究的重点。目前,业界尚缺少衡量裸眼3d显示器显示3d图像质量优劣的方法,从而严重制约了光场显示和内容生成的发展。本课题组提出了裸眼3d显示... 详细信息

裸眼三维(3d)显示技术可使观众无须佩戴眼镜就可以观看到具有立体效果的图像,是3d显示领域研究的重点。目前,业界尚缺少衡量裸眼3d显示器显示3d图像质量优劣的方法,从而严重制约了光场显示和内容生成的发展。本课题组提出了裸眼3d显示中串扰的客观评价指标,重点考虑了相邻像素间颜色值相近致使视点信息复用的情况。实验结果表明,所提评价指标与主观评分值的相关系数可以达到88%以上,指标值与人眼视觉对视差图像的串扰感知高度一致。

关键词：三维显示串扰立体显示光线追踪

Antitumor effect of recombinant human endostatin combined with cisplatin on rats with transplanted Lewis lung cancer

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Asian Pacific Journal of Tropical Medicine 2015年第8期8卷 652-655页

作者： Zhan-Wu yu Ying-Hua Ju Cheng-Liang Yang Han-Bing yu Quan Luo Ye-Gang Ma Yong-yu Liu department of Thoracic Surgery Liaoning Cancer Hospital and Institute dalian Medical University Affiliated Tumour Hospital department of Biochemistry and Molecular Biology China Medical University

Objective: To observe the antitumor effect and mechanism of recombinant human endostatin(Endostar) injection in tumor combined with intraperitoneal injection of cisplatin on subcutaneous transplanted Lewis lung cancer in rats. Methods: A total of 30 C57 rats were selected, and the monoplast suspension of Lewis lung cancer was injected into the left axilla to prepare the subcutaneous transplanted tumor models in the axilla of right upper limb. The models were randomly divided into Groups A, B, and C. Medication was conducted when the tumor grew to 400 mm3. Group A was the control group without any interventional treatment. Group B was injected with Endostar 5 ***-1.d for 10 d. Group C was given the injection of Endostar 5 ***-1.d combined with intraperitoneal injection of cisplatin 5 ***-1.d for 10 d. All the rats in three groups were executed the day after the 10-d medication and the tumor was taken off for measurement of volume and mass changes and calculation of antitumor rate, after which the vascular endothelial growth factor(VEGF) concentration in rats' plasma was determined by ELISA. The tumor tissues were cut for the preparation of conventional biopsies. After hematoxylin-eosin staining, the pathologic histology was examined to observe the structures of tumor tissues, VEGF score and microvessel density(MVd) in each group. Results: The volume and mass of tumor in Groups B and C were significantly lower than Group A(P d mass in Group C were significantly lower than Group B(P d and plasma VEGF level in Group C were significantly lower than Groups A and B(P d and plasma VEGF level were significantly lower than Group A(P d that its number of active tumor cells and the blood capillary around tumor was significantly smaller

关键词： Lewis lung cancer Cisplatin Recombinant human endostatin Vascular endothelial growth factor Microvessel density

Analysis of the optical quality by determining the modulation transfer function for anterior corneal surface in myopes

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International Journal of Ophthalmology(English edition) 2012年第2期5卷 196-201页

作者： Yan-Zhen Zheng, Yao-yu Li department of Ophthalmology General Hospital of Beijing Military Command of Chinese PLA Beijing 100700 China Shanxi Medical University Taiyuan 030001 Shanxi Province China

AIM: To describe the characteristics of modulation transfer function (MTF) of anterior corneal surface, and obtain the the normal reference range of MTF at different spatial frequencies and optical zones of the anterior corneal surface in myopes. METHOdS: Four hundred eyes from 200 patients were examined under SIRIUS corneal topography system. Phoenis analysis software was applied to simulate the MTF curves of anterior corneal surface at vertical and horizontal meridians at the 3, 4, 5, 6, 7mm optical zones of cornea. The MTF values at spatial frequencies of 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55 and 60 cycles/degree (c/d) were selected. RESULTS: The MTF curve of anterior corneal surface decreased rapidly from low to intermediate frequency (0-15cpd) at various optical zones of cornea, the value decreased to 0 slowly at higher frequency (>15cpd). With the increase of the optical zones of cornea, MTF curve decreased gradually. 3) In the range of 3 mm- 6 mm optical zones of the cornea, the MTF values measured at horizontal meridian were greater than the corresponding values at horizontal meridian of each spatial frequency, the difference was statistically significant (Pd at horizontal meridian were less than the corresponding values at vertical meridian at 10-60 spatial frequencies (cpd), and the difference was statistically significant in 25, 30, 35, 40, 45, 50 cpd(Pd to describe the imaging quality of optical systems at anterior corneal surface objectively in detail.

关键词： modulation transfer function optical quality cornea point spread function optical transfer function phase transfer function

江苏省滨海县3~5月龄婴儿接种吸附无细胞百白破联合疫苗后局部不良反应主动监测分析

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中国公共卫生 2024年第2期40卷 139-142页

作者：张鹏梅茂冬于佳魏明伟王小山潘红星吴中区疾病预防控制中心苏州215000 滨海县疾病预防控制中心盐城224500 江苏省疾病预防控制中心南京210000

目的通过对婴儿接种吸附无细胞百白破联合疫苗(diphtheria,tetanus and acellular pertussis combined vaccine,dTaP)后局部不良反应的主动监测,评价婴儿接种dTaP的安全性。方法于2020年7月—2021年3月,对在江苏省滨海县东坎镇、陈涛... 详细信息

目的通过对婴儿接种吸附无细胞百白破联合疫苗(diphtheria,tetanus and acellular pertussis combined vaccine,dTaP)后局部不良反应的主动监测,评价婴儿接种dTaP的安全性。方法于2020年7月—2021年3月,对在江苏省滨海县东坎镇、陈涛镇、界牌镇、滨海现代农业产业园4个乡镇卫生院接种dTaP的3~5月龄婴儿局部不良反应进行主动监测,并按照《预防用疫苗临床试验研究不良事件分级标准指导原则》(2019年第102号)对发生的局部不良反应进行分级,用描述流行病学方法进行局部不良反应分析。结果共有2 490人次纳入至本次dTaP接种后局部不良反应主动监测分析中。dTaP接种后,局部不良反应1 009例次,总发生率为40.52%,其中局部硬结和红晕发生率最高,分别为14.4%和17.0%。1级局部不良反应发生率为35.9%(893/2 490),其中硬结和红晕占比最高,分别占38.18%(341/893)和42.89%(383/893);2级局部不良反应发生率为4.66%(116/2 490),其中红晕和触痛占比最高,分别占34.48%(40/116)和26.72%(31/116);未见3级及以上局部不良反应。局部不良反应多发生在dTaP接种后3d内,占总发生率的98.0%(988/1 009)。硬结和红晕的发生率在3个不同厂家(A、B、C厂家)dTaP受种儿间差异有统计学意义(P dTaP接种后,硬结、肿胀、红晕和皮疹发生率差异有统计学意义(P dTaP接种后硬结、肿胀、红晕发生率明显高于第1剂(P dTaP接种后皮疹发生率明显高于第1剂(P dTaP后局部不良反应发生率分别为40.71%(517/1 270)和40.33%(492/1 220),差异无统计学意义(P> 0.05)。结论硬结、红晕和肿胀为3~5月龄婴儿dTaP接种后发生的主要局部不良反应。

关键词：吸附无细胞百白破联合疫苗不良反应主动监测婴儿

Syntheses,Crystal Structures,Luminescent and Magnetic Properties of Three Ni(Ⅱ),Zn(Ⅱ) and Cd(Ⅱ) Coordination Polymers Based on an Ether-bridged Tetracarboxylic Acid

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Chinese Journal of Structural Chemistry 2020年第5期39卷 967-977页

作者： LI yu CHEN Yong-Xuan ZHAO Zhen-yu ZOU Xun-Zhong FENG An-Sheng Guangdong Research Center for Special Building Materials and Its Green Preparation Technology/Foshan Research Center for Special Functional Building Materials and Its Green Preparation Technology Guangdong Industry PolytechnicGuangzhou 510300China School of Intelligent Manufacturing and Equipment Shenzhen Institute of Information TechnologyShenzhen 518172China

Two 1d and one 3d coordination polymers,namely[Ni2(μ3-deta)(H2 biim)3(H2O)2]n(1),{[Zn2(μ4-deta)(Phen)2(H2O)]·H2O}n(2)and[Cd2(μ6-deta)(Phen)2(H2O)]n(3),have been constructed hydrothermally using H4deta(H4deta=2,3,3’,4’-diphenyl ether tetracarboxylic acid),H2 biim(H2 biim=2,2’-biimidazole),phen(phen=1,10-phenanthroline),and nickel,zinc or cadmium chlorides at 160℃.The products were isolated as stable crystalline solids and characterized by IR spectra,elemental analyses,thermogravimetric analyses(TGA)and single-crystal X-ray diffraction ***-crystal X-ray diffraction analyses revealed that three compounds crystallize in the triclinic system,space group■.Compounds 1 and 2 disclose a 1d chain *** 3 features a 3d *** structural diversity of compounds 1~3 is driven by the metal(Ⅱ)node and the type of supporting *** studies for compound 1 demonstrate an antiferromagnetic coupling between the adjacent Ni(Ⅱ)*** luminescence behavior of compounds 2 and 3 was also investigated.

关键词： coordination polymer tetracarboxylic acid magnetic properties luminescent properties

A novel d-type iterative learning control design for antilinear systems

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Journal of Control and decision 2018年第4期5卷 338-345页

作者： Ming-Fang Chang Zhi-Chao yu Harbin Institute of Technology Shenzhen Graduate School ShenzhenP.R.China

In this paper,a novel d-type iterative learning control(ILC)law is proposed for discrete-time antilinear *** d-type control law is different from the previous linear(nonlinear)d-type ILC *** main feature is that we take the conjugate of the(t+1)-th error to construct the proposed *** convergence proofs are given for their corresponding ILC schemes.

关键词： Antilinear system iterative learning control d-type learning law conjugation norm

Modifying and Reducing Numerical dissipation in A Two-dimensional Central-Upwind Scheme

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Advances in Applied Mathematics and Mechanics 2012年第3期4卷 340-353页

作者： Chi-Jer yu Chii-Tung Liu department of Applied Mathematics National Chiao Tung University1001 University RoadHsinchu 300Taiwan department of Computer Science and Information Engineering Chaoyang University of Technology168 Jifong E.Rd.Wufong Township Taichung County 41349Taiwan

This study presents a modification of the central-upwind Kurganov scheme for approximating the solution of the 2d Euler *** prototype,extended from a 1d model,reduces substantially less dissipation than *** problem arises from over-restriction of some slope limiters,which keep slopes between interfaces of cells to be *** study reports the defect and presents a re-derived optimal *** experiments highlight the significance of this formula,especially in long-time,large-scale simulations.

关键词： Hyperbolic systems of conservation laws Godunov-type finite-volume methods central-upwind scheme Kurganov numerical dissipation anti-diffusion

Plant water use strategies in the Shapotou artificial sand-fixed vegetation of the southeastern margin of the Tengger desert, northwestern China

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Journal of Mountain Science 2019年第4期16卷 898-908页

作者： ZHAO Liang-ju WANG Xiao-gang ZHANG yu-cui XIE Cong LIU Quan-yu MENG Fei Key Laboratory of Earth Surface System and Environmental Carrying Capacity College of Urban and Environmental Sciences Northwest University Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Key Laboratory of Agricultural Water Resources Center for Agricultural Resources Research Institute of Genetics and Developmental Biology Chinese Academy of Sciences College of Tourism and Environment Ankang University

Stable oxygen and hydrogen isotopic compositions(δ^(18)O and δd) of plant xylem water and its potential water sources can provide new information for studying water sources, competitive interactions and water use patterns of plants. The contributions of different water sources to three plants, Hedysarum scoparium(HS), Caragana Korshinskii(CK) and Artemisia ordosica(AO), were investigated in the artificial sand-fixed vegetation of Shapotou, the southeastern margin of the Tengger desert of northwestern China, based on meteorological data and δ^(18)O and δd values of precipitation, groundwater, soil water and xylem water of HS, CK and AO. Our results indicated that soil water infiltration through precipitation was the main water source of the artificial sand-fixed vegetation. Obvious differences in soil water content and in δ^(18)O of soil water and xylem water were found among different seasons. No relationship was found between the δ^(18)O in plant xylem water and in soil water in January. The same water use patterns were found in CK, HS and AO in May, suggesting they have the same water sources. The different water sources of CK, HS and AO in August indicate that water competition occurred. In addition, the main water sources of CK, HS and AO in August mainly come from shallow soil water, while they use relatively deep soil water in May. This phenomenon is related to the differences of soil water content throughout soil profile, precipitation, transpiration and water competition under different growth periods. The water use patterns of CK, HS and AO respond to soil water content throughout the soil profile and their competition balance for water uptake during different growth season. The results indicate that these sandfixed plants have developed into a relatively stable stage and they are able to regulate their water use behavior as a response to the environmental conditions, which reinforces the effectiveness of plantation of native shrubs without irrigation in de

关键词： Plant water source Stable hydrogen and oxygen isotopes Artificial and sand-fixed vegetation in Shapotou