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Vitrectomy combined with silicone oil tamponade in the treatment of severely traumatized eyes with the visual acuity of no light perception

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International Journal of Ophthalmology(English edition) 2013年第2期6卷 198-203页

作者： shan-shan yang Tao Jiang Department of Ophthalmology the Affiliated Hospital of Medical College Qingdao University

AIM: To evaluate the efficacy of surgical treatment of vitrectomy combined with silicone oil tamponade in the treatment of severely traumatized eyes with the visual acuity of no light perception (NLP).METHODS: This was a retrospective uncontrolled interventional case-series of 19 patients of severely traumatized eyes with NLP who underwent vitrectomy surgery at the Affiliated Hospital of Medical College, Qingdao University (Qingdao, China) during a 3-year period. We recorded perioperative factors with the potential to influence functional outcome including duration from the injury to intervention; causes for ocular trauma; open globe or closed globe injury; grade of vitreous hemorrhage; grade of endophthalmitis; grade of retinal detachment; size and location of intraocular foreign body (IOFB); extent and position of retinal defect; grade of proliferative vitreoretinopathy (PVR); type of surgery; perioperative complications and tamponade agent. The follow-up time was from 3 to 18 months, and the mean time was 12 ***: After a mean follow-up period of 12 months (3-18 months) 10.53% (2/19) of eyes had visual acuity of between 20/60 and 20/400, 52.63% (10/19) had visual acuity less than 20/400 but more than NLP, and 36.84% (7/19) remained NLP. Visual acuity was improved from NLP to light perception (LP) or better in 63.16% (12/19) of eyes and the rate of complete retinal reattachment was 73.68% (14/19). Good visual acuity all resulted from those patients of blunt trauma with intact eyewall (closed globe injury). The perioperative factors of poor visual acuity prognosis included delayed intervention; open globe injury; endophthalmitis; severe retinal detachment; large IOFB; macular defect; a wide range of retinal defects andsevere ***: The main reasons of NLP after ocular trauma are severe vitreous hemorrhage opacity; refractive media opacity; retinal detachment; retinal and uveal damages and defects, especially defects of the macula; PVR and endopht

关键词： vitrectomy silicone oil tamponade severely traumatized eyes no light perception

Catalytic combustion of soot particulates over La_(2-x)K_xNiMnO_6 catalysts

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Journal of Natural Gas Chemistry 2011年第4期20卷 384-388页

作者： Wenjuan shan Jiali yang Lihua yang Na Ma Institute of Chemistry for Functionalized Materials College of Chemistry and Chemical Engineering Liaoning Normal University Dalian 116029 Liaoning China

Nanosized La2-xKxNiMnO6 catalysts with ABO3 type perovskite-like structure were prepared by auto-combustion method using citric acid as a ligand to control particle size and *** structures and properties of these perovskite-like oxides were investigated by X-ray powder diffraction（XRD）and temperature-programmed reduction（TPR）.The catalytic activities for soot combustion were evaluated by temperature- programmed oxidation（TPO）with pure O2 and O2/NOx as oxidant,*** the La2-xKxNiMnO6 catalysts,the partial substitution of K at A-site leads to an increase of the concentrations of high valence cation and oxygen vacancy,which enhance the catalytic activity for soot *** optimal substitution amount of K was equal to x=0.4 among these ***（peak temperature）in O2-TPO profile was 420-C and Tp in O2/NOx-TPO profile was 370-C over La1.6K0.4NiMnO6 catalyst for soot particulates combustion under loose contact conditions between catalyst and soot.

关键词： soot oxidation La2-xKxNiMnO6 perovskite-like active oxygen

Modelling the crop yield gap with a remote sensing-based process model:A case study of winter wheat in the North China Plain

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Journal of Integrative Agriculture 2023年第10期22卷 2993-3005页

作者： yang Xu ZHANG Jia-hua yang shan-shan WANG Jing-wen BAI Yun ZHANG Sha Research Center for Remote Sensing and Digital Earth College of Computer Science and TechnologyQingdao UniversityQingdao 266071P.R.China Aerospace Information Research Institute Chinese Academy of SciencesBeijing 100094P.R.China

Understanding the spatial distribution of the crop yield gap(YG)is essential for improving crop *** studies have typically focused on the site scale,which may lead to considerable uncertainties when scaled to the regional *** mitigate this issue,this study used a process-based and remote sensing driven crop yield model for winter wheat(PRYM-Wheat),which was derived from the boreal ecosystem productivity simulator(BEPS),to simulate the YG of winter wheat in the North China Plain from 2015 to *** validation based on statistical yield data revealed good performance of the PRYM-Wheat Model in simulating winter wheat actual yield(Ya).The distribution of Ya across the North China Plain showed great heterogeneity,decreasing from southeast to *** remote sensing-estimated results show that the average YG of the study area was 6400.6 kg ha^(–1).The YG of Jiangsu Province was the largest,at7307.4 kg ha^(–1),while the YG of Anhui Province was the smallest,at 5842.1 kg ha^(–1).An analysis of the responses of YG to environmental factors showed no obvious correlation between YG and precipitation,but there was a weak negative correlation between YG and accumulated *** addition,the YG was positively correlated with *** general,studying the specific features of the YG can provide directions for increasing crop yields in the future.

关键词： remote sensing PRYM-Wheat Model yield gap environmental factors North China Plain

Existence and Stability of Static Solutions of the Landau-Lifshitz Equation with Multi-direct Effective Field

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Acta Mathematica Sinica,English Series 2004年第6期20卷 1135-1152页

作者： Bo Ling GUO Gan shan yang Institute of Applied Physics and Computational Mathematics Center for Nonlinear Studies Department of Mathematics Yunnan Nationalities University Graduate School of Chinese Academy of Engineering Physics

We prove the existence of solutions of the static Landau-Lifshitz equation with multi- direct effective field and with Dirichlet boundary condition,and establish the stability of the solution of Landau-Lifshitz equati... 详细信息

关键词： Landau-Lifshitz equation Liapunov stable Multi-direct effective field

On Multiple Singular Integrals along Polynomial Curves with Rough Kernels

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Acta Mathematica Sinica,English Series 2008年第2期24卷 177-184页

作者： Huo Xiong WU shan Zhi yang School of Mathematical Sciences Xiamen University Xiamen 361005 P. R. China

This paper is devoted to the study of a class of singular integral operators defined by polynomial mappings on product domains. Some rather weak size conditions, which imply the Lp boundedness of these singular integral operators as well as the corresponding maximal truncated singular integral operators for some fixed 1〈p〈 ∞,are given.

关键词： singular integral product domain rough kernel Littlewood-Paley theory Fourier transform estimate

Dual Control Methods for a Mixed Control Problem with Optimal Stopping Arising in Optimal Consumption and Investment

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Numerical Mathematics(Theory,Methods and Applications) 2022年第3期15卷 641-661页

作者： Jingtang Ma Jie Xing shan yang School of Mathematics Southwestern University of Finance and EconomicsChengdu 611130China Guiyang Institute for Big Data and Finance Guizhou University of Finance and EconomicsGuiyang 550025China

This paper studies a problem of optimal investment and consumption with early retirement option under constant elasticity variation(CEV)model with finite *** risky assets are involved in the model with one following geometric Brownian motion and the other a CEV *** problem is a kind of two dimensional mixed control and optimal stopping problems with finite *** existence and continuity of the optimal retirement threshold surfaces are proved and the working and retirement regions are characterized ***-squares Monte-Carlo methods are developed to solve this mixed control and optimal stopping *** algorithms are well implemented and the optimal retirement threshold surfaces,optimal investment strategies and the optimal consumptions are drawn via examples.

关键词： Optimal investment and consumption stochastic control with optimal stopping nonlinear free boundary problems least-squares Monte-Carlo methods

Developing a quantitative index system for assessing sustainable forestry management in Heilongjiang Province,China： a case study

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Journal of Forestry Research 2016年第3期27卷 611-619页

作者： Jin-shan yang Feng-you Wang College of Forestry Northeast Forestry UniversityHarbin 150040 China Guizhou University for Nationalities Guiyang 550025 China Department of Forestry Forest Resources Management Service Harbin 150090 Heilongjiang Province China

In this study, we developed a comprehensive index system for forestry sustainability of Heilongjiang Province, which includes forest resources sustainability,sustainable economic development, sustainable social development and sustainable advancement in science and technology. Based on this system and the regional forest development, we further evaluated the sustainability of Heilongjiang Province for year 2008-2013. The results show that even though the regional forestry has been preliminarily on the track of sustainable development, it is fragile. Four indicators, e.g. soil and water retention rate,forest stand growth（per unit area）, the proportion of national investment and the annual carbon sequestration have important impact on the sustainability, with a weight of 39.0 % in all the indicators. We also analyzed the factors hindering the sustainable development. It turns out that soil and water retention rate, forest stand growth（per unit area）,the proportion of science and technology funds, per capita GDP and the proportion of the tertiary industry production are the main factors hindering regional sustainable development, which accounts for 50.94 % of the total obstacle degrees in the system. At last, we discussed how to promote the regional sustainable development from the perspectives of forest resources sustainability, economic development sustainability, society development sustainability and the sustainable advancement of science and technology.

关键词： Regional forestry Sustainable development Index system Empirical analysis

Microporous metal-organic framework materials for efficient capture and separation of greenhouse gases

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Science China Chemistry 2023年第8期66卷 2181-2203页

作者： shan-Qing yang Tong-Liang Hu Banglin Chen School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin300350China Department of Chemistry University of Texas at San AntonioSan AntonioTexas78249-0698USA

The release of anthropogenic greenhouse gases into the atmosphere poses serious risks to the environment and human health,and is a global threat of growing *** order to ameliorate the greenhouse gas emission problems,the efficient capture and separation of these greenhouse gases are greatly ***-organic framework(MOF)materials,a relatively new kind of organic-inorganic hybrid porous materials with unique framework features,tunable pore environment and high surface areas,have been widely studied as regards their applicability to this *** the well-defined structures of MOF materials greatly promote the understanding of structure-property *** this review,we intend to provide a profound account of significant progress in the field of capture and separation of greenhouse gases using MOFs as adsorbents,including carbon dioxide,methane,nitrous oxide and fluorocompounds(such as perfluorocarbons,sulfur hexafluoride,hydrochlorocarbons,and hydrofluocarbons).The strategies used to realize the efficient capture and separation of greenhouse gases have been summarized,and the relationships between the frameworks,their capture and separation performances and mechanisms are ***,the existing challenges and perspectives with regard to the development of MOF materials for the capture and separation of greenhouse gases and industrial practical application are outlined to further promote this very significant and active emerging topic.

关键词： porous materials metal-organic frameworks greenhouse gases capture and separation structure-property relationship

AN INNOVATIVE ORDERS-OF-MAGNITUDE AHP APPROACH OF LEADING INDUSTRIES SELECTION:CASE STUDY OF JIANGBEI INDUSTRIAL CLUSTERS IN CHINA

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Journal of Systems Science and Systems Engineering 2014年第1期23卷 1-19页

作者： Ke-yu ZHU shan-lin yang Wei CHEN School of Management Hefei University of Technology Joseph M.Katz Graduate School of Business University of Pittsburgh

In current stage of China Industrial Transfer, how to select the leading industries is an extremely difficult decision. In this research, we study the selection problem of Jiangbei Industrial Clusters in Anhui Province. Total thirty-three industries can be transferred to Jiangbei Industrial Clusters, however due to limited capacity, Jiangbei Industrial Clusters can only accommodate a few of them. The difficulties of such decision include： 1） the decisions are qualitative within a complex and uncertain environment; 2） the number of alternatives is beyond the upper bound of comparing elements in general decision making methods. We introduce a new methodology-the Orders-of-Magnitude approach of the Analytic Hierarchy Process （OM-AHP） to solve such selection decision. The OM-AHP follows AHP philosophy to structure qualitative questions and uses ＂pivot＂ element to handle the situation when the alternatives become more than seven. By employing OM-AHP methodology, we found the modern logistics industry and ship ＆ marine equipment etc., are identified to be the leading industries; particularly, we recommend to give higher priority in modern logistics industry and the advanced equipment manufacturing industry, given these two industries could dramatically improve the overall comprehensive economic strength and significantly enhance competitive advantages of the Jiangbei Industrial Clusters.

关键词： Decision analysis AHP industrial transfer