检索结果-南通市图书馆

Varifocal occlusion in an optical see-through near-eye display with a single phase-only liquid crystal on silicon

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2024年第4期12卷 833-853页

作者： WOONGSEOB HAN JAE-WON LEE JUNG-YEOP SHIN MYEONG-HO CHOI HAK-rin KIM JAE-HYEUNG PARK Department of Electrical and Computer Engineering Inha University100 Inha-roMichuhol-guIncheon 22212Republic of Korea School of Electronic and Electrical Engineering Kyungpook National University80 Daehak-roBuk-guDaegu 41566Republic of Korea School of Electronics Engineering Kyungpook National University80 Daehak-roBuk-guDaegu 41566Republic of Korea Department of Information and Communication Engineering Inha University100 Inha-roMichuhol-guIncheon 22212Republic of Korea

We propose a near-eye display optics system that supports three-dimensional mutual *** exploiting the polarization-control properties of a phase-only liquid crystal on silicon (LCoS),we achieve real see-through scene masking as well as virtual digital scene imaging using a single *** depth control of the real scene mask and virtual digital image is also achieved by using a focus tunable lens (FTL) pair of opposite *** proposed configuration using a single LCoS and opposite curvature FTL pair enables the self-alignment of the mask and image at an arbitrary depth without distorting the see-through view of the real *** verified the feasibility of the proposed optics using two optical benchtop setups:one with two off-the-shelf FTLs for continuous depth control,and the other with a single Pancharatnam–Berry phase-type FTL for the improved form factor.

关键词： optics crystal phase

Hormonal Status Assessment of Infertile Congolese Men

在线全文

学校读者我要写书评

暂无评论

Advances in Reproductive Sciences 2024年第2期12卷 155-164页

作者： Constantin Moukouma Henriette Poaty Rancia Colombe Diakouka Diambalou Ulrich Ngoma-Nzaou Guy Emergence Poaty Etienne Mokondjimobé Anani Wencesl Sévérin Odzebé Institute of Research of Health Sciences Brazzaville Congo Faculty of Health Sciences Marien Ngouabi University Brazzaville Congo National Laboratory of Public Health Brazzaville Congo Health Priority Cabinet Brazzaville Congo Teaching Hospital of Brazzaville Brazzaville Congo

Background: The pathologies causing male infertility are various (congenital or acquired) and concern several hormone-producing organs: the hypothalamus, pituitary gland, testes and adrenals. The hormonal dosage includes systematically testosterone, FSH and LH. These analyses often highlight hypogonadism hypogonadotropic or hypergonadotropic. They can sometimes be normal. The present study aimed to establish the hormonal profile of infertile men residing in Brazzaville. Patients and Methods: It was a cross-sectional descriptive study during five years (from 2018 to 2023). It concerned 344 infertilemen with an abnormal spermogram and spermocytogram. The method was performed from the blood dosage of testosterone, FSH, and LH using the Elisa technique. Results: The hormonal assessment was not normal in 48.83% (168/344) of cases. Increased values of testosterone were noted in 6.10% of cases and decreased in 12.20%. Abnormal high values of FSH were observed in 14.24% of cases and decreased values in 8.13%. LH was elevated, i.e. 2.03% of cases and decreased in 6.10% of subjects. Conclusions: A hormonal disturbance was observed in almost half of the infertile men. It concerned the hypothalamus-pituitary and the testes axis and indicated mainly a state of hypogonadism with high FSH and low LH.

关键词： Male infertility Hormones Testosterone FSH LH Hypogonadism

Boosting electrocatalytic activity with the formation of abundant heterointerfaces and N, S dual-doped carbon nanotube for rechargeable Zn-air battery

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第9期84卷 140-152页

作者： rin Na Kyeongseok Min Hyejin Kim Yujin Son sang Eun Shim Sung-Hyeon Baeck Department of Chemistry and Chemical Engineering Education and Research Center for Smart Energy Materials and ProcessInha UniversityIncheon 22212Republic of Korea

Herein,a facile synthetic strategy is proposed to fabricate high-performance electrocatalysts for rechargeable Zn-air batteries(ZABs).Heterostructured NiCo/NiCo_(2)S_(4) nanoparticles encapsulated in N-,S-co-doped CNT(NiCo/NiCo_(2)S_(4)@NSCNT) are synthesized via co-precipitation,thermal carbonization,and partial sulfidation *** strongly coupled NiCo/NiCo_(2)S_(4) heterostructure can improve the redox property and charge transfer ***,the CNTs with abundant foreign dopants provide high electrical conductivity and abundant defect sites for both the oxygen evolution reaction(OER) and oxygen reduction reaction(ORR).The prepared NiCo/NiCo_(2)S_(4)@NSCNT electrocatalyst exhibits a low overpotential of 349 mV at a current density of 10 mA cm-2 and a half-wave potential of 0.865 V for the OER and ORR,***,the ZAB assembled using as-prepared NiCo/NiCo_(2)S_(4)@NSCNT can provide superior specific capacity(756.16 mA h g_(Zn)^(-1)],peak power density(155.82 mW cm^(-2)),and long-term cyclability compared to those of the precious metal-based electrocatalyst(Pt/C+RuO_(2)).

关键词： Bifunctional electrocatalyst NiCo alloy Bimetallic sulfide Heterojunction Zinc–air battery

CRISPR/Cas9-mediated gene editing to confer turnip mosaic virus (TuMV) resistance in Chinese cabbage (Brassica rapa)

在线全文

学校读者我要写书评

暂无评论

Horticulture Research 2023年第6期10卷 135-143页

作者： Ye-rin Lee Muhammad Irfan Siddique Do-Sun Kim Eun Su Lee Koeun Han sang-Gyu Kim Hye-Eun Lee Vegetable Research Division National Institute of Horticultural and Herbal ScienceRural Development AdministrationWanju55365Republic of Korea Department of Horticultural Sciences North Carolina State University Mountain Horticultural Crops ResearchExtension Center 455 Research DriveMills RiverNC 28759USA Department of Biological Sciences Korea Advanced Institute for Science and TechnologyDaejeon34141Republic of Korea

Genome editing approaches,particularly the CRISPR/Cas9 technology,are becoming state-of-the-art for trait development in numerous breeding *** advances in improving plant traits are enabled by this influential tool,especially for disease resistance,compared to traditional *** of the potyviruses,the turnip mosaic virus(TuMV),is the most widespread and damaging virus that infects Brassica *** generated the targeted mutation at the eIF(iso)4E gene in the TuMV-susceptible cultivar“Seoul”using CRISPR/Cas9 to develop TuMV-resistant Chinese *** detected several heritable indel mutations in the edited T0 plants and developed T1 through generational *** was indicated in the sequence analysis of the eIF(iso)4E-edited T1 plants that the mutations were transferred to succeeding *** edited T1 plants conferred resistance to *** was shown with ELISA analysis the lack of accumulation of viral ***,we found a strong negative correlation(r=-0.938)between TuMV resistance and the genome editing frequency of eIF(iso)***,it was revealed in this study that CRISPR/Cas9 technique can expedite the breeding process to improve traits in Chinese cabbage plants.

关键词： CRISPR/Cas9 TuMV breeding

Analysis of Quenching Resistor Effect to Improve Stability of TIA Circuit for APD-A Secondary Publication

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Electronic Research and Application 2024年第2期8卷 54-61页

作者： Dong-Han Ki Yu-rin Jin Sung-Mi Kim Seong-Ik Cho Department of Electronics Engineering Jeonbuk National UniversityJeollabuk-doRepublic of Korea

In this paper,since the Avalanche Photo Diode(APD)for Light-to-Voltage LTV conversion uses a high voltage in the operating range unlike other Photo Diodes(PD),the quenching resistor must be connected in series to prevent overcurrent when using the Transimpedance Amplifier(TIA).In such a case,quenching resistance may affect the transfer function of the TIA circuit,resulting in serious ***,in this paper,by analyzing the effect of APD quenching resistance on the voltage and current loop transfer function of TIA,we proposed a loop analysis and a method for determining the quenching resistance value to improve stability.A TIA circuit with quenching resistance was designed by the proposed method and its operational stability was verified through simulation and chip fabrication.

关键词： APD TIA Quenching resistor Stability Transfer function

Real-time noise-free inline self-interference incoherent digital holography with temporal geometric phase multiplexing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Photonics Research 2023年第6期11卷 906-916页

作者： KIHONG CHOI JAE-WON LEE JUNGYEOP SHIN KEEHOON HONG JOONGKI PARK HAK-rin KIM Digital Holography Research Section Electronics and Telecommunications Research InstituteDaejeon 34129Republic of Korea School of Electronic and Electrical Engineering Kyungpook National UniversityDaegu 41566Republic of Korea School of Electronics Engineering Kyungpook National UniversityDaegu 41566Republic of Korea

In this paper,we propose a real-time incoherent digital holographic(IDH)recording system free from bias and twin-image noises.A motionless three-step polarization-encoded phase-shifter operating at 99 Hz is realized with two electrically controllable birefringence-mode liquid crystal cells operating in tandem with a geometric phase lens and *** on the proposed optical configuration,a coaxial straight-line self-interference IDH recording system is ***,the elimination of bias and twin-image noise from three phase-shifted images is demonstrated as a proof of ***,complex-valued holographic video acquisitions with a resolution greater than 20 megapixels are demonstrated,with an effective acquisition frequency of33 Hz.

关键词： holographic phase geometric

在线全文

学校读者我要写书评

暂无评论

聚苯颗粒混凝土轻质保温墙板抗弯性能试验

武汉理工大学学报 2024年第4期46卷 13-18页

作者：陈宜虎陆毅朱亮鑫黄万发张敏卢旦桂林理工大学土木工程学院桂林541004 贺州学院建筑与电气工程学院贺州542899 桂林天马装配式建筑有限公司桂林541203 广西绿色建材与建筑工业化重点实验室桂林541004 华东建筑设计研究院有限公司上海200002

结合聚苯颗粒混凝土保温隔热性能好、轻质、环保和钢筋桁架刚度大二者的优势,提出一种新型装配式轻质保温墙板。为明确该类墙板的平面外抗弯性能,对3个试件进行了单调荷载作用下的四点弯曲试验,对比分析了该类墙板的破坏机理和不同钢筋... 详细信息

结合聚苯颗粒混凝土保温隔热性能好、轻质、环保和钢筋桁架刚度大二者的优势,提出一种新型装配式轻质保温墙板。为明确该类墙板的平面外抗弯性能,对3个试件进行了单调荷载作用下的四点弯曲试验,对比分析了该类墙板的破坏机理和不同钢筋桁架数量对抗弯性能的影响。试验结果表明:该类墙板的力学性能优良,具有良好的延性;墙板中钢筋桁架数量的增加,可明显提高墙板的抗弯性能,当桁架数量从1个提升到4个时,墙板极限承载力提高了115.9%。

关键词：聚苯颗粒混凝土装配式轻质墙板抗弯性能

Camera array calibration for light field acquisition

在线全文

学校读者我要写书评

暂无评论

Frontiers of Computer Science 2015年第5期9卷 691-702页

作者： Yichao XU Kazuki MAENO Hajime NAGAHARA rin-ichiro TANIGUCHI Graduate School of Information Science and Electrical Engineering Kyushu University Fukuoka 819-0395 Japan

Light field cameras are becoming popular in com- puter vision and graphics, with many research and commercial applications already having been proposed. Various types of cameras have been developed with the camera array being one of the ways of acquiring a 4D light field image using multiple cameras. Camera calibration is essential, since each application requires the correct projection and ray geometry of the fight field. The calibrated parameters are used in the fight field image rectified from the images captured by multiple cameras. Various camera calibration approaches have been proposed for a single camera, multiple cameras, and a moving camera. However, although these approaches can be applied to calibrating camera arrays, they are not effective in terms of accuracy and computational cost. Moreover, less attention has been paid to camera calibration of a light field camera. In this paper, we propose a calibration method for a camera array and a rectification method for generating a light field image from the captured images. We propose a two-step algorithm consisting of closed form initialization and nonlinear refinement, which extends Zhang＇s well-known method to the camera array. More importantly, we introduce a rigid camera constraint whereby the array of cameras is rigidly aligned in the camera array and utilize this constraint in our calibration. Using this constraint, we obtained much faster and more accurate calibration results in the experiments.

关键词： light field camera array calibration rectification digital refocusing

Telomeric impact of conventional chemotherapy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Medicine 2013年第4期7卷 411-417页

作者： Yiming Lu Waiian Leong Olivier Guérin Eric Gilson Jing Ye Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine Shanghai 200025China Institut for Research on Cancer and Aging Nice(IRCAN)Nice UniversityCNRS UMR7284/INSERM U1081Faculty of MedicineNiceFrance Geriatric Unit Cimiez HospitalCHU of NiceFrance Department of Medical Genetics Archet 2 HospitalCHU of NiceFrance

The increased level of chromosome instability in cancer cells,leading to aneuploidy and gross chromosomal rearrangements,is not only a driving force for oncogenesis but also can be the Achille’s heel of the disease since many chemotherapies(CT)kill cells by inducing a non-tolerable rate of DNA damage.A wealth of published evidence showed that telomere stability can be more affected than the bulk of the genome by several conventional antineoplasic *** results raise the interesting possibility that CT with genotoxic drugs preferentially target *** agreement with this view,accelerated shortening of telomere length has been described in blood lineage cells following high-dose CT(stem cell transplantation)or non-myeloablative ***,almost nothing is known on the consequences of this shortening in terms of telomere stability,senescence and on the development of second cancers or post-treatment aging-like syndromes in cancer survivors(cognitive defect,fertility impairment,etc.).In this article,we propose:(1)telomeres of cancer cells are preferential genomic targets of chemotherapies altering chromosome maintenance;(2)telomere functional parameters can be a surrogate marker of chemotherapy sensitivity and toxicity;(3)the use of anti-telomere molecule could greatly enhance the sensitivity to standards chemotherapies.

关键词： telomere antineoplasic drugs conventional chemotherapies