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Effects of rigid gas permeable contact lens on morphological parameters and vision-related quality of life in keratoconus patients

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International Journal of Ophthalmology(English edition) 2022年第11期15卷 1772-1781页

作者： Yue Xu Yun Wang Xiao-Feng Zhang Department of Ophthalmology Dushu Lake Hospital Affiliated to Soochow UniversitySuzhou 215000Jiangsu ProvinceChina

AIM: To evaluate the effect of rigid gas permeable contact lens(RGP-CL) on corneal morphological parameters and vision-related quality of life in keratoconus(KC) ***: Totally 57 eyes of 30 KC patients who were followed-up for more than two years, including 17 RGP wearers(32 eyes) and 13 non-wearers(25 eyes) were retrospectively analyzed. Initial medical history and corneal topography were collected at baseline. Corneal topography, corneal aberration, optical coherence tomography, and vision-related quality of life questionnaires were performed at the last ***: According to corneal topography, increase of the flattest keratometric values was higher in RGP wearers than in non-wearers(P=0.038). The morphological parameters, including symmetry index of front corneal curvature(P=0.004) and Baiocchi-Calossi-Versaci index front(P=0.047), were lower in RGP wearers than in nonwearers. Vertical coma was smaller in RGP wearers than non-wearers in 3.0, 5.0, 6.0, and 7.0 mm pupil diameters, respectively(Pmorphological parameters of corneal topography, and other questionnaire scores between the two groups(all P>0.05).CONCLUSION: Long-term use of RGP does not worsen KC but may cause corneal epithelial remodeling to increase symmetry of corneal anterior surface, reduce corneal vertical coma and improve visual quality. However, RGP wearing causes a slight decrease in vision-related quality of life. The occurrence of ocular surface symptoms is mainly associated with environmental triggering factors.

关键词： keratoconus rigid gas permeable contact lens morphological parameters corneal aberration visionrelated quality of life

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Intercropping Cocoa with Rice and Plantain Influencing Cocoa morphological parameters and Weed Biomass

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Journal of Agricultural Science and Technology(B) 2011年第5期1卷 746-750页

作者： A. O. Famaye G. O. Iremiren O. Olubamiwa A. E. Aigbekaen O. A. Fademi Cocoa Research Institute of Nigeria P.M.B. 5244 Ibadan Nigeria

A field study was conducted at CRIN Uhonmora Substation, Edo State in Derived Guinea Savanna Zone of Nigeria between 2007 and 2008. The experiment determined influence of intercropping cocoa with rice and plantain at early stage of field establishment. Four treatments considered were cocoa （sole）, cocoa/rice, cocoa/plantain and cocoa/rice/plantain. Spacing of 3.1 m apart was used for cocoa and plantain while rice was 30 cm. Plot laid out was randomized complete block design replicated three times. Data on cocoa morphological parameters comprising plant height, girth and leaf area as well as weed biomass were measured monthly. Cocoa survival count was also determined. Data collected were subjected to ANOVA, and LSD was used to separate the means. Survival count showed over 95% survival in all treatments without any significance differences. On plant height and leaf area vegetative growth were significantly higher （P 〈 0.05） in the intercrops than the sole cocoa but not significantly different in all the months. Plant vigour was significantly higher in cocoa/plantain intercrop. Cocoa/rice/plantain produced the least weed biomass while cocoa sole gave the highest. Therefore, cocoa/rice and cocoa/plantain intercrops could be recommended to cocoa farmers in Nigeria instead of sole planting at early age of field establishment.

关键词： Cocoa intercropping morphological parameters weed

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Quantitative Electron Tomography for Accurate Measurement of Precipitates Microstructure parameters in Al–Cu–Li Alloys

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Acta Metallurgica Sinica(English Letters) 2022年第11期35卷 1882-1894页

作者： Shi-Yong Li Ruo-Han Shen Yu-Tao He Cui-Lan Wu Jiang-Hua Chen Centre for High Resolution Electron Microscopy College of Materials Science and EngineeringHunan UniversityChangsha 410082China College of Materials Science and Engineering Hainan UniversityHaikou 570228China

Mechanical theories show that properties of alloys are strongly dependent on the morphological parameters oftheir strengthening ***,accurate measurement of precipitates microstructure parameters is still a challenging *** this article,we develop a quantitative electron tomography method by combining computer vision technology to accurately characterize the three-dimensional microstructure parameters,such as volume fractions,sizes and distributions,of the T_(1) and δ’/θ’/δ’ precipitates in Al-Cu-Li(-Mg) *** they have extremely large aspect-ratios in shape and large numbers in density upon formation in the Al matrix,these thin plate-like precipitates are difficult to be characterized quantitatively without the assistance of computer vision *** is shown that the property difference between two peak-aged states of the alloy can be well explained with the quantitative precipitate parameters correctly *** these correct precipitate data,we also tested the validity of current mechanical models for projecting the contribution of precipitates to the strengths of the alloy,demonstrating that quantitative relations between strength and micro structure parameters still need to be refined.

关键词： Al–Cu–Li–Mg alloy T1 precipitate δ′/θ′/δ′composite precipitate morphological parameters Electron tomography Computer vision

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Shade adaptive response and yield analysis of different soybean genotypes in relay intercropping systems

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Journal of Integrative Agriculture 2017年第6期16卷 1331-1340页

作者： WU Yu-shan YANG Feng GONG Wan-zhuo Shoaib Ahmed FAN Yuan-fang WU Xiao-ling YONG Tai-wen LIU Wei-guo SHU Kai LIU Jiang DU Jun-bo YANG Wen-yu College of Agronomy Sichuan Agricultural University Chengdu 611130 P.R. China Sichuan Engineering Research Center for Crop Strip Intercropping System Chengdu 611130 P.R. China Key Laboratory of Crop Ecophysiology and Farming System in Southwest Ministry of Agriculture Chengdu 611130 P.R. China Characteristic Crops Research Institute Chongqing Academy of Agricultural Sciences Chongqing 402160 P.R. China

Soybean is one of the major oil seed crops,which is usually intercropped with other crops to increase soybean production area and ***,soybean is highly sensitive to *** is unclear if soybean morphology responds to shading（i.e.,shade tolerance or avoidance）and which features may be suitable as screening materials in relay strip ***,in this study,various agronomic characteristics of different soybean genotypes were analyzed under relay intercropping *** soybean materials used in this study exhibited genetic diversity,and the coefficient of variations of the agronomic parameters ranged from 13.84 to 72.08%during the shade period and from 6.44 to 52.49%during the maturity *** ratios of shading to full irradiance in stem mass fraction（SMF）were almost greater than 1,whereas opposite results were found in the *** with full irradiance,the average stem length（SL）,leaf area ratio（LAR）and specific leaf area（SLA）for the two years（2013 and 2014）increased by 0.78,0.47 and 0.65 under shady conditions,***,the stem diameter（SD）,total biomass（TB）,leaf area（LA）,number of nodes（NN）on the main stem,and number of branches（BN）all *** the shady period,the SL and SMF exhibited a significant negative correlation with yield,and the SD exhibited a significant positive correlation with *** correlation between the soybean yield and agronomic parameters during the mature period,except for SL,the first pod height（FPH）,100-seed weight（100-SW）,and reproductive growth period（RGP）,were significant（P〈0.01）,especially for seed weight per branch（SWB）,pods per plant（PP）,BN,and vegetative growth period（VGP）.These results provide an insight into screening the shade tolerance of soybean varieties and can be useful in targeted breeding programs of relay intercropped soybeans.

关键词： intercropping light morphological parameters shade avoidance soybean

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Stability of inner dump slope under coal pillar support:case study in an open‑pit coal mine

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International Journal of Coal Science & Technology 2022年第2期9卷 193-210页

作者： Guanghe Li Xiaoxu Yang Dong Wang Yanting Wang Xiangyu Yu College of Mining Liaoning Technical UniversityFuxin 123000LiaoningChina

The stability of an inner dump slope was investigated under the efect of coal pillar support considering the development position of *** on the instability mechanism and load distribution characteristics of the supporting coal pillar,the three-dimensional mechanical efects of the supporting coal pillar are *** the two-dimensional equivalent principle and the residual thrust method,the stability of the inner dump slope was analyzed under the efect of pillar support at diferent dump development *** quantitative efects of various factors on the inner dump slope stability were revealed,and the coal pillar shape parameters were optimized through numerical *** results indicate that the slope stability coefcient is linearly related to the top width and height of the coal pillar,slope angle,and base inclination angle,and has an exponential relation with the coal pillar strike length and slope height *** are quadratic and absolute value relations with the coal pillar outer and the inner bottom angle,*** top width of the coal pillar in the inner dump of Shengli East No.2 open-pit coal mine should be at a level of+824 m,and the optimal top width and height are 15 and 36.7 m,*** instability mechanism of the supporting and retaining coal pillar obtained by numerical simulations and the stability of the inner dump are in good agreement with the theoretical *** results provide a theoretical basis for the design,treatment,and safe implementation of similar open-pit mine slope engineering.

关键词： Inner dump Supporting coal pillar Slope stability Numerical simulation morphological parameters

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Monitoring of Soil Loss from Erosion Using Geoinformatics and Geotechnical Engineering Methods

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Journal of Civil Engineering and Architecture 2013年第1期7卷 78-84页

作者： Jacob Odeh Ehiorobo Osadolor Christopher Izinyon Department of Civil Engineering Faculty of Engineering University of Benin Benin PMB 1154 Nigeria

In this study, the position of all major rill and gully erosion sites were located using hand held GPS （Global Positioning System） receiver during reconnaissance surveys. Based on severity rating and geopolitical considerations, six of the erosion gully sites were selected for monitoring. Control points were established around each of the gully sites using three Leica 500 dual frequency GPS receivers by method of DGPS （differential GPS） surveys. Detailed topographical survey of the gully sites was carried out using total stations. With the aid of SPOT satellite imageries in combination with total station data and GIS （geographic information system） location maps, contoured maps along with DEM （digital elevation model） were generated using ARCGIS 9.2 software. The morphological parameters of the gullies including depth, width, length and area of the gullies were determined. Volumetric estimate of the amount of soil loss from gully erosion was also carried out. Soil samples were recovered from the gully sites to determine their erodibility and other parameters to be used for soil loss modeling. The result of the studies was used as an indicator for determining the gully initiation point. Slope-area relationship and threshold of gully initiation was established. The minimum volume of soil loss occurred in gully No. 2 （Queen Ede）. The minimum AS^2 value was 345 while the maximum was 3,267.

关键词： Differential GPS gully erosion rill erosion morphological parameters digital elevation model.

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morphological ANALYSIS OF HUMAN CUTANEOUS MICRORELIEF

MORPHOLOGICAL ANALYSIS OF HUMAN CUTANEOUS MICRORELIEF

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第十一届国际体视学大会暨第十届中国体视学与图像分析学术会议

作者： Jyothsna SRAVANTHI C. Babu RAO Department of Industrial Biotechnology CTCoimabotoreIndia. DPEND IGCAR Kalpakkam 603102India

Images of negative replicas of cutaneous microreliefs of four age groups are analysed to quantify the texture of microrelief. morphological operations are employed to isolate the features of interest. Meaningful morphological parameters are obtained, which can distinguish the physiological *** was difficulty in segmenting the cells of the dermis in the relief, possibly due to uneven illumination. A method based on morphological operations is successfully employed to segment (automatically extract) these cells. Gray level statistics (of the unprocessed image) and morphological measurements on the segmented cells are obtained for these images. Among all the measures, mean gray level, number of cells, average cell area, average cell perimeter, shape factor, Feret diameter ratio and average intercept number have shown significant correlation with age group. The methodology discussed here is completely non-invasive and can be used as often as needed on the body. The image analysis based on mathematical morphology can be usefully employed to generate a data bank by extending the measurements over a large number of persons of different age groups, both male and female, with different clinical conditions. This data can in turn serve as a valuable resource base for clinical diagnostic *** the images studied were taken from literature we did not have any control on the imaging conditions. The images were photographed under 30°incident light beam. Alternative illumination modes like homogeneous illumination, or multiple images of the same relief with different illumination conditions can also be studied to explore the possibility of better segmentation, and more information on replica-crest-height (i.e. groove in skin relief) distribution. Care should also be taken while taking the replica of the micro relief to avoid warping, trapped air bubbles and colouration. These are critical for the success of this technique.

关键词： Cutaneous micro-relief image processing morphological parameters

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