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低公差敏感度的大变倍比极短总长中波红外变焦光学系统设计

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中国光学(中英文) 2025年第01期18.0卷 70-77页

作者：李雨哲胡源霍家琦张又予高天元长春理工大学光电工程学院光电测控与光信息传输技术教育部重点实验室

目前中波红外变焦系统在大变倍比，长焦距变焦条件下，难以在极短总长的条件下具备较低敏感度。针对这一问题，本文通过合理分配非球面和衍射面，采用独立组元低敏感度设计方法，设计出一套无需折叠光路，总长仅有337 mm的低敏感度中波... 详细信息

目前中波红外变焦系统在大变倍比，长焦距变焦条件下，难以在极短总长的条件下具备较低敏感度。针对这一问题，本文通过合理分配非球面和衍射面，采用独立组元低敏感度设计方法，设计出一套无需折叠光路，总长仅有337 mm的低敏感度中波红外变焦光学系统。通过降低各个组元的像差从而降低系统公差敏感度。该系统具有30倍大变倍比，可实现30～900 mm的长焦距连续变焦。该系统具有变倍比大、长焦距变焦、极短总长以及低敏感度并且全焦距范围内像质良好等优点，在狭小空间目标识别、跟踪、探测等方面，具有较大的应用优势。

关键词：红外系统长焦距变焦大变倍比极短总长低敏感度

Timing Calibration of the Follow-up X-Ray Telescope On Board the Einstein Probe Satellite

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Research in Astronomy and Astrophysics 2025年第1期25卷 135-142页

作者： Xiaofan Zhao Weiwei Cui Hao Wang Yifan Zhang Zijian Zhao Dongjie Hou Yuxuan Zhu Yusa Wang Jingjing Xu Laidan Luo Dawei Han Yanji Yang Juan Wang jia Ma Xiongtao Yang jia huo Wei Li Ziliang Zhang Haoyang Geng Yong Chen Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Chinese Academy of Sciences

The Follow-up X-ray Telescope（FXT） is one of the main scientific instruments on board the Einstein Probe astronomical satellite, which was launched in 2024 January. FXT consists of two Wolter I type nested telescopes（FXT-A and FXT-B） with a focal length of 1600 mm. The focal plane detector employs a PNCCD with 384 × 384pixels. The timing mode of FXT serves as the primary operating mode for fast X-ray timing observations. To evaluate and validate the timing performance of FXT prior to launch, a comprehensive timing calibration was performed at the 100 m X-ray test facility. By simulating various periodic Crab-like profiles using the Grid Controlled X-ray Tube（GCXT） in conjunction with a pulsar simulation module, it was verified that the relative time accuracy of FXT exceeds 5 × 10-9. Furthermore, employing GCXT with a voltage pulse generation module enabled the determination of the time resolutions for FXT-A and FXT-B, recorded as 45.6 ± 2.7 μs and47.1 ± 2.8 μs, respectively. An absolute timing calibration for FXT-B was carried out using the GCXT and a time interval analyzer, revealing a measured time delay of 3.9 ± 2.1 μs for FXT-B.

关键词： instrumentation: detectors methods: data analysis telescopes

Three-dimensional hierarchical MoS_2/CoS_2 heterostructure arrays for highly efficient electrocatalytic hydrogen evolution

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Green Energy & Environment 2017年第2期2卷 134-141页

作者： Canbin Ouyang Shi Feng jia huo Shuangyin Wang State Key Laboratory of Chem/Bio-Sensing and Chemometrics Provincial Hunan Key Laboratory for Graphene Materials and Devices College of Chemistry and Chemical Engineering Hunan University

Developing non-expensive, highly active and highly stable electrocatalysts for hydrogen evolution has aroused extensive attention, owing to the necessity of novel clean and sustainable energy carriers. In this paper, we report a synthesis of free-standing three-dimensional hierarchical MoS_2/CoS_2 heterostructure arrays through a convenient process. The investigation of electrocatalytic HER performance suggests that the MoS_2/CoS_2 hybrid catalyst exhibits significant enhancement in HER(onsetpotential and potential at a current density of 100 mA cm^(-2) are 20 mV and125 mV, respectively) and superior durability(no shift of current density is observed after a continuous scanning of 3000 times) compared with individual CoS_2 and MoS_2. The superior HER performance was attributed to the formation of the interface between CoS_2 and MoS_2 through the electrochemical characterization, Raman, XPS analysis, and the control experiment. The lower onsetpotential, higher current density, excellent durability, and the free-standing structure of the three-dimensional hierarchical MoS_2/CoS_2 heterostructure array make it a promising cathode catalyst suitable for widespread application.

关键词： MoS2/CoS2 Heterostructure array Free-standing Hydrogen evolution reaction

The Role of Consumer Privacy Concerns in Shaping Platform Strategy for Online Markets

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Journal of the Operations Research Society of China 2024年第2期12卷 363-386页

作者： Jin-Kun Yang Yong-Rui Duan jia-Zhen huo School Economics and Management Tongji UniversityShanghai 200092China

We investigate the effects of consumer privacy concerns on the pricing and personal data collection strategy of an online *** online platform derives revenues from disclosing consumer information to *** compete for the information in order to enable them to price discriminate and thus derive revenues from consumer purchases.A novel aspect of our research is that we allow the online platform to sell only a subset of consumer *** develop analytical models where consumers can/cannot protect their *** analysis yields three main ***,in the monopoly case,we find that when the consumer privacy disclosure aversion cost is relatively low,it is optimal for the platform to sell all consumer information to the ***,in the duopoly case,we illustrate that when the consumer privacy disclosure aversion cost is relatively low,the platform will sell all consumer information to only one firm;when the cost is moderate,the platform will choose to sell the information of only some consumers and to only one firm;when the cost is relatively high,the platform will select only some of the consumers and sell their information to both ***,it will be better for the platform to provide the information protection service for free when the privacy cost is low.

关键词： Price discrimination User privacy Consumer information Two-sided market Privacy disclosure aversion cost

Single-Machine Scheduling with Step-Deteriorating Jobs and Rejection

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Journal of the Operations Research Society of China 2024年第4期12卷 1088-1102页

作者： Fan-Yu Kong Cui-Xia Miao Yu-jia huo jia-Xin Song Yu-Zhong Zhang School of Mathematical Sciences Qufu Normal UniversityQufu273165ShandongChina Institute of Operations Research Qufu Normal UniversityRizhao276826ShandongChina

In this paper,we consider the single-machine scheduling with step-deteriorating jobs and *** job is either rejected by paying a rejection penalty,or accepted and processed on the single machine,and the actual processing time of each accepted job is a step function of its starting time and the common deteriorating *** objective is to minimize the makespan of the accepted jobs plus the total penalty of the rejected *** the case of common deteriorating penalty,we first show that the problem is NP-hard in the ordinary *** we present two pseudo-polynomial algorithms and a 2-approximation ***,we propose a fully polynomial time approximation *** the case of common normal processing time,we present two pseudo-polynomial time algorithms,a 2-approximation algorithm and a fully polynomial time approximation scheme.

关键词： Scheduling Step-deteriorating Rejection penalty NP-hard Fully polynomial time approximation scheme

Pupillary capture following sutureless scleral-fixated intraocular lens in children with Marfan syndrome

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International Journal of Ophthalmology(English edition) 2023年第11期16卷 1789-1793页

作者： Dong-Mei Qi Shu-jia huo Tao Yu Southwest Hospital/Southwest Eye Hospital Third Military Medical University(Army Medical University)Chongqing 400038China

AIM:To compare the clinical outcomes between two approaches for sutureless scleral-fixated intraocular lens(SFIOL)in children with Marfan syndrome(MFS).METHODS:The study included 15 children(26 eyes)with lens subluxation due to *** children underwent lensectomy,anterior vitrectomy,and sutureless *** to the position of placement of intraocular lens(IOL)haptics,two study groups were reviewed for best corrected visual acuity(BCVA)and postoperative complications:group A,14 eyes with haptics fixated at 2.0 mm from the limbus;group B,12 eyes with the haptics fixated at 2.5 mm from the ***:The mean axial length for all patients was 25.66±2.35 *** BCVA in logMAR were significant improved in both groups(0.77±0.32 to 0.17±0.12 in group A,0.66±0.25 to 0.24±0.12 in group B,both P0.05).Pupillary capture was main postoperative complication,occurring between 3d and *** occurred in 7 eyes in group A and one eye in group B(P=0.02).CONCLUSION:Sutureless SFIOL is an effective treatment approach for lens subluxation in children with *** capture is the main postoperative *** IOL haptics at 2.5 mm from the limbus can reduce the occurrence of pupillary capture.

关键词： Marfan syndrome sutureless scleral-fixated intraocular lens pupillary capture children

Influences of GVD on the characteristics of soliton in a passively mode-locked Er-doped fiber laser

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The Journal of China Universities of Posts and Telecommunications 2013年第6期20卷 117-121页

作者： BAI Bing ZHAO Xiao-hui GUO Yu-bin huo jia-yu College of Communication Engineering Jilin University

In this paper, the characteristics of soliton in a passively mode-locked Er-doped fiber laser modeled by a non-distributed model are numerically investigated with the split-step Fourier method. Based on the analysis and model, sech2-shaped soliton is obtained by controlling the group velocity dispersion （GVD） and small-signal gain of the gain fiber. The law that the dispersion influences the characteristics of soliton in the mode-locked fiber laser is researched in net-cavity averaged anomalous dispersion regime.

关键词： passively mode-locked Er-doped fiber laser optical soliton group velocity dispersion

Optoelectronic characteristics and application of black phosphorus and its analogs

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Frontiers of physics 2021年第4期16卷 161-183页

作者： Ying-Ying Li Bo Gao Ying Han Bing-Kun Chen jia-Yu huo College of Communication Engineering Jilin UniversityChangchun 130012China

The tunable bandgap from 0.3 eV to 2 eV of black phosphorus(BP)makes it to fill the gap in *** studying the properties of BP more comprehensive,scientists have discovered that many twodimensional materials,such as tellurene,antimonene,bismuthene,indium selenide and tin sulfide,have similar structures and properties to black phosphorus thus called black phosphorus *** this review,we briefly introduce preparation methods of black phosphorus and its analogs,with emphasis on the method of mechanical exfoliation(ME),liquid phase exfoliation(LPE)and chemical vapor deposition(CVD).And their characterization and properties according to their classification of singleelement materials and multi-element materials are *** focus on the performance of passively mode-locked fiber lasers using BP and its analogs as saturable absorbers(SA)and demonstrated this part through classification of working ***,we introduce the application of BP and its analogs,and discuss their future research prospects.

关键词： black phosphorus and its analogs passively mode-locked fiber lasers optoelectronic characteristics saturable absorber

Study on the chaotic dynamics of the mode-locked fiber ring laser

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The Journal of China Universities of Posts and Telecommunications 2013年第3期20卷 104-108页

作者： GAO Bo WU Ge DUAN Tao huo jia-yu TIAN Xiao-jian College of Communication Engineering Jilin University College of Electronic Science and Engineering Jilin University The Northern Institute of Electronic Equipment of China

In this paper, we study the chaotic dynamics of the mode-locked fiber laser by numerical simulation. The structures of the passively mode-locked fiber laser and the actively mode-locked fiber laser are studied by modeling and analysis. By appropriately adjusting the small signal gain of the optical fiber amplifier, we observe the period-doubling bifurcations and route to chaos in the passively mode-locked fiber laser based on nonlinear polarization rotation effect. Chaos in the actively mode-locked erbium-doped fiber laser is obtained by adjusting the elliptic modulus parameter of the active modulator and the intra-cavity length. Simulation results have theoretical significance for the practical application of chaotic soliton communication.

关键词： mode-locked fiber laser period-doubling chaos optical soliton