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Hydromassage of macular hole edges for large and persistent full-thickness macular holes

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International Journal of Ophthalmology(English edition) 2024年第3期17卷 551-557页

作者： Yi Cai Wen-Bo Liu Duo Wei Xun Deng Xiao-Xin Li Ming-Wei Zhao Xuan Shi jian-hong liang Department of Ophthalmology Peking University People’s HospitalBeijing 100044China Eye Diseases and Optometry Institute Beijing 100044China Beijing Key Laboratory of Diagnosis and Therapy of Retinal and Choroid Diseases Beijing 100044China College of Optometry Peking University Health Science CenterBeijing 100044China Xiamen Eye Center of Xiamen University Xiamen 361102Fujian ProvinceChina Department of Ophthalmology the Second Hospital of Lanzhou UniversityLanzhou 730030Gansu ProvinceChina

●AIM:To introduce the macular hole(MH)hydromassage technique as a potentially beneficial approach for the treatment of large or persistent MH.●METHODS:This retrospective observational case series comprised 16 consecutive patients(17 eyes)diagnosed with *** criteria involved a hole aperture diameter larger than 600μm or the presence of an unclosed MH larger than 600μm following the previous *** MH repair procedures were administered in all cases,involving the manipulation and aspiration of the hole margin through the application of water flow with a soft-tip flute needle.A comprehensive assessment was conducted for each case before and after surgery,and optical coherence tomography(OCT)images were captured at every follow-up point.●RESULTS:The mean preoperative aperture diameter was 747±156μm(range 611-1180μm),with a mean base diameter of 1390±435μm(range 578-2220μm).Following surgery,all cases achieved complete anatomical closure of MH,with 13 cases(76.5%)exhibiting type 1 closure and 4 cases(23.5%)demonstrating type 2 *** significant differences were observed in the preoperative OCT variables between the two closure *** with type 1 closure showed a significantly improved visual acuity(0.70±0.10,range 0.50-0.80)compared to those with type 2 closure(0.90±0.12,range 0.80-1.00,P=0.014).●CONCLUSION:The MH hydromassage technique demonstrates promising results,achieving acceptable closure rates in cases of large or persistent *** technique may serve as an effective adjunctive maneuver during challenging MH surgery.

关键词： macular hole large macular hole persistent macular hole optical coherence tomography surgical technique hydromassage

Rapid evaluation of arsenic contamination in paddy soils using field portable X-ray fluorescence spectrometry

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Journal of Environmental Sciences 2018年第2期30卷 345-351页

作者： jian-hong liang Pan-Pan Liu Zheng Chen Guo-Xin Sun hong Li Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification Institute of Karst Geology Chinese Academy of Geological Sciences Guilin 541004 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Department of Environmental Science Xi' an Jiaotong-Liverpool University Suzhou 215123 China College of Urban Construction and Environmental Engineering Chongqing University Chongqing 400045 China

Arsenic（As） in paddy fields is deteriorating food security and human health through rice ingestion. Rice is the dominant food source of arsenic exposure to half of the world’s population. Therefore, an in situ effective method for As risk evaluation in paddy soil is strongly needed to avoid As exposure through rice ingestion. Herein, we developed a rapid analytical methodology for determination of As in plant tissues using field portable X-ray fluorescence spectrometry（FP-XRF）. This method was applied to rice roots in order to evaluate the As contamination in paddy soils. The results showed that rice roots with iron plaques were superior to rhizosphere soils for generating FP-XRF signals, especially for field sites with As concentrations lower than the soil detection limit of FP-XRF（30.0 mg/kg）.Moreover, the strong linear relationships of As concentrations between the rice roots and corresponding leaves and grains proved that the rice root, rather than the soil, is a better predictor of As concentrations in rice grains. The research provides an efficient As monitoring method for As contaminated paddy fields by using wetland plant roots with iron plaques and XRF-based analytical techniques.

关键词： XRF Arsenic Risk evaluation Rice roots Rhizosphere soils Iron plaque

High-dose ruthenium-106 plaque therapy for circumscribed choroidal hemangioma: a retrospective study of 25 Chinese patients

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International Journal of Ophthalmology(English edition) 2020年第3期13卷 425-430页

作者： Jing Li En-Zhong Jin jian-hong liang Department of Ophthalmology Ophthalmology and Optometry CenterPeking University People’s Hospital and Beijing Key Laboratory of Diagnosis and Treatment of Retinal and Choroid DiseasesBeijing 100044China Department of Ophthalmology Shaanxi Provincial People’s HospitalXi’an 710068Shaanxi ProvinceChina

AIM:To evaluate the efficacy and safety of ruthenium-106(106Ru)plaque radiotherapy at a dose(>50 Gy)higher than recommended(29-50 Gy)for treatment of circumscribed choroidal hemangioma(CCH)in Chinese ***:This retrospective study included 25symptomatic CCH patients undergoing 106Ru plaque brachytherapy involving 25 eyes between January 2005and August *** examination was performed at the baseline and at each post-treatment follow-up visit,using best-corrected visual acuity(BCVA),dilated fundus examination,and B-scan *** primary efficacy outcome measures included the changes in BCVA and hemangioma dimensions at the last followup visit from the ***:The mean follow-up duration was 28.0±26.6(range,12-110)*** the hemangiomas were located in the posterior pole except for two involving the *** mean apex dose of 106Ru plaque radiotherapy was84.4±19.7 *** mean BCVA improved from 41.4±29.3(0-97)at the baseline to 53.0±33.8(0-97)ETDRS letters at the last visit(P=0.01).The mean hemangioma height declined from 3.98±0.88(2.40-5.50)mm to 0.84±1.63(0-6.47)mm(P≤0.001),and the greatest linear diameter(GLD)reduced from 9.36±2.23(6.80-15.00)to 7.40±2.45(0-13.00)mm(P≤0.001).Hemangioma size increased in one(4%)eye with a worsened vision,and subretinal fluid completely resolved in all but one patient(4%).Radiationrelated retinopathy was observed in two patients at posttreatment 9 and 11mo,***:106Ru plaque brachytherapy at a dose(>50 Gy)higher than recommended(29-50 Gy)is an effective treatment regimen for symptomatic CCH associated with significantly improved visual acuity and a favorable safety profile in Chinese patients.

关键词： circumscribed choroidal hemangioma radiotherapy ruthenium-106 Chinese patients retrospective study

Multi-UAV collaborative system with a feature fast matching algorithm

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信息与电子工程前沿：英文版 2020年第12期21卷 1695-1712页

作者： Tian-miao WANG Yi-cheng ZHANG jian-hong liang Yang CHEN Chao-lei WANG School of Mechanical Engineering&Automation Beihang UniversityBeijing 100191China School of Physics and Mechatronics Engineering Longyan UniversityLongyan 364000China State Key Laboratory of Intelligent Manufacturing System Technology Beijing Institute of Electronic System EngineeringBeijing 100040China

We present a real-time monocular simultaneous localization and mapping(SLAM)system with a new distributed structure for multi-UAV collaboration *** system is different from other general SLAM systems in two aspects:First,it does not aim to build a global map,but to estimate the latest relative position between nearby vehicles;Second,there is no centralized structure in the proposed system,and each vehicle owns an individual metric map and an ego-motion estimator to obtain the relative position between its own map and the neighboring vehicles'.To realize the above characteristics in real time,we demonstrate an innovative feature description and matching algorithm to avoid catastrophic expansion of feature point matching workload due to the increased number of *** on the hash and principal component analysis,the matching time complexity of this algorithm can be reduced from 0(logN)to 0(1).To evaluate the performance,the algorithm is verified on the acknowledged multi-view stereo benchmark dataset,and excellent results are ***,through the simulation and real flight experiments,this improved SLAM system with the proposed algorithm is validated.

关键词： Multiple UAVs Collaboration Simultaneous localization and mapping(SLAM) Feature description and matching

Ruthenium-106 plaque brachytherapy for the treatment of diffuse choroidal hemangioma in Sturge-Weber syndrome

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International Journal of Ophthalmology(English edition) 2020年第3期13卷 513-517页

作者： Ying-Ying Yu Xiao-Xin Li jian-hong liang Department of Ophthalmology&Clinical Center of Optometry Peking University People’s HospitalBeijing 100044China Eye Diseases and Optometry Institute Peking University People’s Hospital Beijing 100044China Beijing Key Laboratory of Diagnosis and Therapy of Retinal and Choroid Diseases Beijing 100044China College of Optometry Peking University Health Science CenterBeijing 100191China

AIM:To evaluate the efficacy of ruthenium-106 plaque brachytherapy for the treatment of diffuse choroidal hemangioma(DCH)in Sturge-Weber syndrome(SWS).METHODS:A total of 8 patients with DCH in SWS managed with plaque brachytherapy were retrospectively *** were treated with ruthenium-106 plaque therapy(median apex dose:83 Gy)at the thickest tumor *** follow-up,we recorded the tumor thickness,the best-corrected visual acuity(BCVA),subretinal fluid(SRF)status,and complications following ***:At a median follow-up of 43 mo,tumor regression was observed in all cases,with a complete resolution of SRF and reduction in *** radiation complications were recorded during the follow up ***:Ruthenium-106 plaque therapy to the thickest portion of the tumor seems to be a useful treatment in patients with DCH in SWS.

关键词： diffuse choroidal hemangioma Sturge-Weber syndrome plaque brachytherapy

High selectively oxidative bromination of toluene derivatives by the H_2O_2-HBr system

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Chinese Chemical Letters 2011年第4期22卷 382-384页

作者： Jie Ju Yu Jin Li jian Rong Gao jian hong Jia liang Han Wei jian Sheng Yi Xia Jia The State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology Zhejiang University of TechnologyHangzhou 310032China

An aqueous solution of hydrogen peroxide and hydrogen bromide illuminated by a 60 W incandescent light bulb serves as a source of bromine *** substituted toluenes（NO2,Cl,Br,H,CH3） were high selectively brominated at the benzyl position for monobromination in CH2C12 at ice water with catalyst *** simple but effective bromination of toluene derivatives with an aqueous H2O2-HBr system is characterized with the use of inexpensive reagents and a lower impact on the environment, which make it a good alternative to the existing bromination methods.

关键词： Oxidative bromination Toluene derivatives H2O2-HBr

Bearing-only Visual SLAM for Small Unmanned Aerial Vehicles in GPS-denied Environments

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International Journal of Automation and computing 2013年第5期10卷 387-396页

作者： Chao-Lei Wang Tian-Miao Wang jian-hong liang Yi-Cheng Zhang Yi Zhou Robotics Institute Beijing University of Aeronautics and Astronautics

This paper presents a hierarchical simultaneous localization and mapping（SLAM） system for a small unmanned aerial vehicle（UAV） using the output of an inertial measurement unit（IMU） and the bearing-only observations from an onboard monocular camera.A homography based approach is used to calculate the motion of the vehicle in 6 degrees of freedom by image feature *** visual measurement is fused with the inertial outputs by an indirect extended Kalman filter（EKF） for attitude and velocity ***,another EKF is employed to estimate the position of the vehicle and the locations of the features in the *** simulations and experiments are carried out to test the performance of the proposed *** result of the comparison with the referential global positioning system/inertial navigation system（GPS/INS） navigation indicates that the proposed SLAM can provide reliable and stable state estimation for small UAVs in GPS-denied environments.

关键词： Visual simultaneous localization and mapping(SLAM) bearing-only observation inertial measurement unit small unmanned aerial vehicles(UAVs) GPS-denied environment

The process of retinal vascularization in retinopathy of prematurity after ranibizumab treatment in China

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International Journal of Ophthalmology(English edition) 2019年第7期12卷 1146-1150页

作者： Qing-Yu Meng Yong Cheng Ming-Wei Zhao jian-hong liang Department of Ophthalmology & Clinical Center of Optometry Peking University People's Hospital Beijing 100044 China Eye Diseases and Optometry Institute Peking University People's Hospital Beijing 100044 China Beijing Key Laboratory of Diagnosis and Therapy of Retinal and Choroid Diseases Beijing 100044 China College of Optometry Peking University Health Science Center Beijing 100191 China

AIM: To explore the process of retinal vascularization and risk factors for retinopathy of prematurity(ROP) treated with intravitreal ranibizumab(IVR) as ***: Infants with type 1 ROP who received IVR as primary treatment from August 2014 to October 2016 at Peking University People’s Hospital’s Ophthalmology Department were included in the study. All eyes received 0.25 mg ranibizumab at initial treatment. Retinal vascularization was evaluated clinically. Potential risk factors were also recorded and ***: Retinal vascularization was completed in 126 eyes(62.7%), and retinal vascularization terminated in zone II and zone III with 16 eyes(7.9%) and 44 eyes(21.9%), respectively, after more than 1-year follow-up. In multivariate regression analysis, lower birth weight(BW), severity of ROP and repeated injections were found to be risk factors for peripheral avascular area(P<0.05). CONCLUSION: In our retrospective study, 29.8% of the ROP eyes treated with ranibizumab have peripheral avascular area at the last follow-up. Lighter BW and the severity of ROP are risk factors. Furthermore, repeated injections also increase the risk of retinal peripheral avascular area remaining in ROP patients.

关键词： retinal vascularization retinopathy of prematurity ranibizumab avascular retinal area

Processing of a low-costγ-γ'NiPtAl coating with improved oxidation resistance

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Rare Metals 2024年第6期43卷 2832-2841页

作者： Yan jiang liang-liang Wei jian He hong-Bo Guo School of Materials Science and Engineering Beihang UniversityBeijing 100191China Key Laboratory of High-Temperature Structural Materials and Protective Coatings Ministry of Industry and Information TechnologyBeihang UniversityBeijing 100191China

A novelγ-γ'(Ni solid solution—Ni_(3)Al)NiPtAl coating was produced on advanced single-crystal(SC)superalloy N5 by electroplating of a thin Pt coating with~3μm in thickness followed by heat treatment at 1000℃in *** comparison,a traditionalγ-γ'NiPtAl coating was also produced by electroplating of a thick Pt coating with~6μm in thickness followed by heat treatment at 1100℃in *** novel coating has a mass gain of~0.5 mg·cm^(-2)after 100 h 1-h cyclic oxidation at 1150℃,showing better oxidation resistance than the traditional *** oxide scale mostly consisting ofα-Al_(2)O_(3)grew on the novel coating because the element Cr from the SC alloy substrate contributes to the formation ofα-Al_(2)O_(3).Pt content in the novel coating has significant effect on the oxidation *** optimized Pt content in the coating is about 16 at%,which is helpful to reduce the diffusion of harmful elements from the substrate into the coating but also to reduce the cost of the coating.

关键词： γ-γ'NiPtAl coating Platinum Oxidation Al_(2)O_(3) Superalloy