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| 1 | High-speed and high-efficiency three-dimensional shape measurement based on Gray-coded light显示文摘Fringe projection profilometry has been increasingly sought and applied in dynamic three dimensional(3D)shape measurement.In this work,a robust,high-efficiency 3D measurement based on Gray-coded light is proposed.Unlike the traditional method,a tripartite phase unwrapping method is proposed to avoid the jump errors on the boundary of code words,which are mainly caused by the defocusing of the projector and the motion of the tested object.Subsequently,the time overlapping coding strategy is presented to greatly increase the coding ef-ficiency,decreasing the projected number in each group from seven(i.e.,3+4)to four(i.e.,3+1)for one restored 3D frame.The combination of two proposed techniques allows the reconstruction of a pixel-wise and unambiguous 3D geometry of dynamic scenes with strong noise using every four projected patterns.To the best of our knowledge,the presented techniques for the first time preserve the high anti-noise ability of a method based on the Gray code while overcoming the drawbacks of jump errors and low coding efficiency.Experiments have demonstrated that the proposed method can achieve robust,high efficiency 3D shape measurement of high speed dynamic scenes even polluted by strong noise. | ZHOUJIE WU WENBO GUO YUEYANG LI YIHANG LIU QICAN ZHANG | 2020 | Photonics Research2020，8，6： | 17 |
| 2 | Superfast and large-depth-range sinusoidal fringe generation for multi-dimensional information sensing显示文摘Among many multi-dimensional information sensing methods such as structured-light and single-pixel imaging technologies, sinusoidal fringe generation is general and crucial. Current methods of sinusoidal fringe generation force concessions in either the speed or the depth range. To mitigate this trade-off, we have simultaneously achieved both speed breakthrough and depth range enhancement by improving both the optical projection system and binary coding algorithm based on an off-the-shelf projector. Specifically, we propose a multifocal projection system and oblique projection method, which essentially eliminates the existence of a single focal plane in the conventional axisymmetric system and utilizes its anisotropy characteristics to achieve a superior filtering effect. Furthermore, the optimal pulse width modulation technique is introduced to modulate the square binary pattern for eliminating specific harmonics. To the best of our knowledge, the proposed method, for the first time,simultaneously achieved superfast(9524 frames per second) and large-depth-range(560 mm, about three times that of the conventional method) sinusoidal fringe generation with consistently high accuracy. Experimental results demonstrate the superior performance of the proposed method in multi-dimensional information sensing such as 3D, 4D, and [x, y, z, t;s(strain)]. | SIJIE ZHU ZHOUJIE WU JING ZHANG QICAN ZHANG YAJUN WANG | 2022 | Photonics Research2022，10，11： | 3 |
| 3 | Surface chemistry considerations of gangue dissolved species in the bastnaesite flotation system显示文摘Inefficient flotation of bastnaesite remains a challenge in the production of rare earth elements.This study aimed to investigate the dissolution and adsorption behaviour of species that are commonly released into bastnaesite flotation pulp from Ca/Ba-bearing gangue minerals.The influence and corresponding mechanisms on the bastnaesite mineral surface and collectors,namely sodium oleate(NaOL),were evaluated experimentally based on micro-flotation,zeta potentials,in situ attenuated total reflection Fourier transform infrared spectroscopy(ATRFTIR),and X-Ray photoelectron spectroscopy(XPS)analyses.The flotation recovery of bastnaesite significantly decreased from ~95% to ~25%,~15%,~80%,~25% when exposed to calcite,fluorite,barite,and mixed dissolved species,respectively.The zeta potential of bastnaesite was pH sensitive,indicating that H^(+) and OH^(−)determine the surface potential of bastnaesite.Solution chemistry analyses revealed that the presence of the dissolved species differed at various pH values.In situ ATR-FTIR demonstrated the different effects of the dissolved species from calcite,fluorite,and barite on collector adsorption.The former two dissolved species mainly depressed the chemisorption of the NaOL monomers(RCOO^(-)),whereas calcite also affected the physical adsorption of the oleic acid molecular dimer(RCOOH·RCOO^(-)).Moreover,the barite dissolved species only affected the physical adsorption of the NaOL species.The results of XPS analysis revealed that dissolved species from these three gangues could pre-adsorbed onto bastnaesite and affected the interaction with the collector.Density functional theory calculations were employed to provide further theoretical insights into the interactions between the dissolved species from calcite,fluorite,and barite and NaOL. | Longhua Xu Zhoujie Wang Kaiqian Shu Houqin Wu Yuehua Hu | 2022 | Fundamental Research2022，2，5： | 1 |
| 4 | Zhengyuan capsule(正元胶囊)for the treatment of cancer-related fatigue in lung cancer patients undergoing operation:a study protocol for a randomized controlled trial显示文摘OBJECTIVE: To evaluate the efficacy and safety of Zhengyuan capsule(正元胶囊) when treating Cancer-related fatigue(CRF) in lung cancer patients undergoing surgical operation.METHODS/DESIGN: This is a single-center, double-blinded, prospective, and randomized controlled trial in the Department of Integrated Chinese and Western Medicine, Shanghai Chest Hospital Shanghai Jiao Tong University, Shanghai. Eligible participants will be randomly allocated into two groups: a treatment group receiving an 8-week Zhengyuan capsule regimen therapy and a control group receiving an 8-week placebo capsule regimen therapy. Evaluation will be carried out at four timelines: the participants' screening period, baseline period, the middle of the intervention period,and the end of the intervention period. The primary outcome assessment is fatigue scoring using the Cancer Fatigue Scale(CFS) measurement system.Secondary measurements include fatigue severity assessment using the Multidimensional Fatigue Symptom Inventory-Short Form(MFSI-SF) measurement system, Traditional Chinese Medicine syndrome pattern differentiation, levels of immunologic indicators(TNF-α, IL-6, IL-1, T lymphocytes subsets and B lymphocyte subsets), patient's pulmonary function, performance status scale(PS),self-rating scale of sleep(SRSS), and adverse events(AEs).DISCUSSION: The trial results can provide efficacy and safety data of Zhengyuan capsule when treating CRF in clinic. The data can also be imported into the management and treatment guidelines for CRF in lung cancer patients undergoing operation throughout China. | ZHANG Zhouji ZHANG Ming WU Xiaoting CUI Qing GUO Yijun | 2021 | Journal of Traditional Chinese Medicine2021，41，3： | 0 |
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