A5100655367- Astronomical Observations and Instrumentation
- Inertial Sensor and Navigation
- Solar Radiation and Photovoltaics
- Solar Thermal and Photovoltaic Systems
- Optical Systems and Laser Technology
- Adaptive optics and wavefront sensing
- solar cell performance optimization
- Opportunistic and Delay-Tolerant Networks
- Advanced Measurement and Detection Methods
- Calibration and Measurement Techniques
- Optical measurement and interference techniques
- Cloud Computing and Resource Management
- Advanced Data Storage Technologies
- Spacecraft Design and Technology
- Satellite Communication Systems
- Parallel Computing and Optimization Techniques
- Machine Learning in Healthcare
- Geophysics and Sensor Technology
- Optical Wireless Communication Technologies
- Surfactants and Colloidal Systems
- Radiation Detection and Scintillator Technologies
- Atmospheric aerosols and clouds
- Geochemistry and Geologic Mapping
- Advanced Optical Imaging Technologies
- Respiratory Support and Mechanisms
Changchun University of Science and Technology
2012-2024
Optica
2024
North China Electric Power University
2022
Alibaba Group (United States)
2022
University of California, Los Angeles
2022
Hebei North University
2021
China Academy of Space Technology
2014-2020
Stanford University
2020
University College Dublin
2015
Shanghai Jiao Tong University
2010
Background: Mechanically ventilated patients in the intensive care unit (ICU) have high mortality rates. There are multiple prediction scores, such as Simplified Acute Physiology Score II (SAPS II), Oxford Severity of Illness (OASIS), and Sequential Organ Failure Assessment (SOFA), widely used general ICU population. We aimed to establish scores on mechanically with combination these disease severity other features available first day admission. Methods: A retrospective administrative...
We propose a greedy minimum mean squared error (MMSE)-based antenna selection algorithm for amplify-and-forward (AF) multiple-input multiple-output (MIMO) relay systems. Assuming equal-power allocation across the multi-stream data, we derive closed form expression (MSE) resulted from adding each additional pair. Based on this result, iteratively select antenna-pairs at nodes to minimize MSE. Simulation results show that our greatly outperforms existing schemes.
Resource disaggregation has gained much traction as an emerging datacenter architecture, it improves resource utilization and simplifies hardware adoption. Under disaggregation, different types of resources (memory, CPUs, etc.) are disaggregated into dedicated servers connected by high-speed network fabrics. Memory brings efficiency challenges to concurrent garbage collection (GC), which is widely used for latency-sensitive cloud applications, because GC mutator threads simultaneously run...
The multicomponent oxide solid solution is a versatile platform to tune the delicate balance between competing spin, charge, orbital, and lattice degrees of freedom for materials design discovery. development compositionally complex oxides with superior functional properties has been largely empirical serendipitous, in part due exceedingly chemistry structure solutions that span range length scales. classical molecular dynamics (MD), as powerful statistical method investigate over large...
It is important to be able quantify, theoretically and experimentally, the performance of coherent digital systems, so that their suitability for a given metrology application can assessed. Here, free-space inline holographic system investigated. To isolate scattered object field, phase-shifting interferometry (PSI) techniques are used. Several sequential measurements made, where phase reference field stepped by known amount relative between captures. Under ideal conditions such as...
Remote memory techniques for datacenter applications have recently gained a great deal of popularity. Existing remote focus on the efficiency single application setting only. However, when multiple co-run remote-memory system, significant interference could occur, resulting in unexpected slowdowns even if same amounts physical resources are granted to each application. This slowdown stems from massive sharing applications' swap data paths. Canvas is redesigned system that fully isolates...
To solve the bottleneck caused by fact that solar simulators are unable to simulate a collimation angle of 32′ and an irradiance one constant at same time, we designed new type optical system for simulators. Five major design aspects addressed: hybrid condenser, lens, field stop, optimization integrator effects on non-uniformity when projector lens is defocused. The results show simulator described in this paper can realize constant. Meanwhile, less than ±1.34% irradiation area...
In view of the lack high-precision optical simulation equipment for dim space targets at present, in this study, a method based on polarization stray light suppression is proposed, overall system architecture engine depolarization constructed, mechanism generation explored, and dark state leakage presented by compensating phase LCOS reflected with wave plate; high-image quality collimating large field flat aberration designed illumination optimization critical angle matching spectroscopic...
Dark-and-weak-target simulators are used as ground-based calibration devices to test and calibrate the performance metrics of star sensors. However, these affected by full-field-of-view energy nonuniformity. This problem impacts quality output images accuracy sensors inhibits further improvements in navigational accuracy. In study reported this paper, we sought analyze factors which affect uniformity dark-and-weak-target simulators. These include uneven irradiation backlight sources, leakage...
Aiming at the problem that error of multi-optical axis alignment is difficult to control in simulation calibration test, a dynamic compensation method for space environment system proposed. The effect optical disturbance on signal detection link was analyzed obtain accuracy requirements, mechanism established, target with long pupil distance designed, transfer model based topology structure constructed, and test prototype built. results show static attitude resolution better than 3" position...
Aiming at the problem of overbrightness target simulator background for LED backlight panel illumination, a 5° aperture angle-matched collimated illumination method is proposed based on study dark-state leakage LCD display device and scattered stray light system. After simulation analysis can make contrast increase by 3.1 times solve dark targets being drowned bright light, which exists in simulator. It experimentally verified that using shows 2.8 improvement SNR effectively reduces energy...
The ChangE-3 is the first Chinese soft landing lunar probe, including a lander and rover. After on certain area of surface, started in-situ exploration, rover began surface reconnaissance. Data exploration can be transmitted via direct-to-earth link or relay lander. UHF communication system designed for transmitting data from to achieved on-orbit verifications goal transmission successfully. paper describes design probe system, transmisson loss analysis, tests ground, verifications.
In order to improve simulation precision of solar simulator, this paper researched general design scheme optical system. First all, discussed optimization techniques for focusing system, integrator, collimating and which aberrations influenced the uniformity integrator; Secondly, analysis defocus effect integrator projector lens put forward optimal distance formula, then using ZEMAX simulated system in LightTools; Finally, tested results show that: it can one constant, irradiation range...
Fiber-coupled scintillation dosimeters are a cost-effective alternative to the conventional ion chambers in radiation dosimetry. However, stem effects from optical fibers such as Cerenkov incur significant errors readout signal. Here we introduce second near-infrared window dosimeter, dubbed NIR2D, that can potentially be used real-time detector for clinical megavoltage beams. Lanthanide-based rare-earth NaYF4 nano-phosphors doped with both erbium and cerium elements were synthesized,...
For the purpose of solving large temperature field reconstruction error caused by different measuring point arrangements and problem that prior dataset cannot be built due to data loss or distortion in actual measurement, a three-dimensional profile optimization algorithm is proposed repair empirical optimize arrangement points based on Tucker decomposition, minimum condition number method, greedy algorithm, hill climbing algorithm. We used decomposition missing obtain complete core tensor....
NAND flash-based Solid State Drives (SSDs) provide a promising opportunity to enable the unified memory-storage hierarchy (UMH). The UMH renders single memory address space for heterogeneous memories. Thus, CPUs can directly access structured data in SSDs and eliminate bulk copy/swap between storage devices. However, applying traditional indexing structures on may lead poor performance. Particularly, popular hash generates highly randomized write traffic, incurring significant garbage...
The unequal aperture off-axis optical integrator design method is proposed to improve the irradiation uniformity of solar simulators and solve problem limited due aberrations uneven distribution incident radiation. Firstly, structure designed based on scalar diffraction theory analyze factors affecting homogenization ability integrator. Then, relationship between sub-eye lens arrangement explored in combination with Lagrange invariance principle semi-definite programming theory. Finally,...