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双坡光伏阵列风荷载遮挡效应数值模拟研究

合肥工业大学学报（自然科学版） 2024年第6期47卷 829-834,842页

作者：望世雄王顺波邱冶中国电建集团华东勘测设计研究院有限公司浙江杭州311122 河海大学土木与交通学院江苏南京210098

风荷载是光伏支架结构设计的控制荷载之一,目前针对双坡光伏板的风荷载取值尚没有统一标准。为揭示双坡光伏阵列的群体遮挡效应,文章采用雷诺时均方法和剪切应力传输模型(shear stress transfer,SST)k-ω湍流模型,研究来流风向角和光伏... 详细信息

风荷载是光伏支架结构设计的控制荷载之一,目前针对双坡光伏板的风荷载取值尚没有统一标准。为揭示双坡光伏阵列的群体遮挡效应,文章采用雷诺时均方法和剪切应力传输模型(shear stress transfer,SST)k-ω湍流模型,研究来流风向角和光伏支架倾角对光伏组件风荷载的影响规律,基于遮挡效应研究给出光伏阵列体型系数的取值建议,并与3个国家规范取值进行对比。结果表明:双坡光伏阵列存在明显的遮挡效应,0°和15°为双坡光伏板体型系数的最不利风向,最大风吸力出现在背风光伏板前缘或角部位。随着光伏支架倾角的增加,整体体型系数和极值风吸力显著增大。背风光伏板体型系数取值高于我国规范给出的开敞式双坡屋面规范取值。

关键词：双坡光伏板数值模拟体型系数遮挡效应干扰因子

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补体凝集素与呼吸系统疾病

中国免疫学杂志 2024年第3期40卷 641-644,650页

作者：王世雄聂浩张昊川黄河安徽医科大学深圳二院临床学院深圳市第二人民医院呼吸与危重症医学科深圳518035 长江大学医学部荆州434023

补体凝集素途径是补体系统激活的一种途径,纤维胶凝蛋白(ficolin)与甘露糖结合凝集(MBL)是激活免疫补体途径的一类起始物,两者结构及功能极其相似,可通过识别病原表面的某些物质,激活补体,加强调理吞噬作用或直接杀灭和溶解相关病原,从... 详细信息

补体凝集素途径是补体系统激活的一种途径,纤维胶凝蛋白(ficolin)与甘露糖结合凝集(MBL)是激活免疫补体途径的一类起始物,两者结构及功能极其相似,可通过识别病原表面的某些物质,激活补体,加强调理吞噬作用或直接杀灭和溶解相关病原,从而在免疫系统中尤其在抗感染方面发挥重要作用。呼吸系统疾病多以感染性疾病为主。近年来,也有相关研究报道ficolin/MBL与众多其他呼吸系统疾病具有相关性,本文就ficolin/MBL与呼吸系统疾病的相关研究进行综述,以期为相关研究提供理论支撑。

关键词：纤维胶凝蛋白甘露糖结合凝集素补体呼吸系统疾病

天麻钩藤汤加减联合依那普利叶酸片对原发性高血压患者血压水平与中医证候积分的影响

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世界复合医学 2024年第4期10卷 5-8页

作者：邹文博王世雄宜都市中医医院心血管科湖北宜昌443000

目的探讨天麻钩藤汤加减方联合依那普利叶酸片对原发性高血压患者血压水平、中医证候积分及椎动脉血流动力学指标的影响。方法选取宜都市中医医院于2022年11月—2023年11月收治的92例原发性高血压患者为研究对象,通过随机数表法分为两... 详细信息

目的探讨天麻钩藤汤加减方联合依那普利叶酸片对原发性高血压患者血压水平、中医证候积分及椎动脉血流动力学指标的影响。方法选取宜都市中医医院于2022年11月—2023年11月收治的92例原发性高血压患者为研究对象,通过随机数表法分为两组,各46例。对照组采用依那普利与叶酸片进行治疗,观察组在对照组基础上加用天麻钩藤汤加减治疗,对比两组患者的血压水平、中医证候积分和椎动脉血流动力学指标。结果治疗后,两组患者的血压均下降;研究组的平均舒张压为(77.25±2.87)mmHg,收缩压为(124.50±4.30)mmHg,均低于对照组的(85.74±3.52)mmHg、(131.75±3.91)mmHg,差异有统计学意义(t=12.678、8.461,P均<0.05)。两组的头痛、眩晕、心悸等中医证候积分均降低,且观察组低于对照组,差异有统计学意义(P均<0.05)。两组患者的椎动脉血流动力学指标均改善,且观察组患者血流峰值流速、舒张末期流速高于对照组,脉动指数水平低于对照组,差异有统计学意义(P均<0.05)。结论天麻钩藤汤加减方与依那普利叶酸片联用治疗原发性高血压,能更有效降低血压和中医证候积分,优化椎动脉血流动力学指标。

关键词：天麻钩藤汤加减依那普利叶酸片原发性高血压血压水平中医症状积分

A better bound for implicit factorization problem with shared middle bits

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Science China(Information Sciences) 2018年第3期61卷 108-117页

作者： shixiong wang Longjiang QU Chao LI Shaojing FU College of Computer National University of Defense Technology State Key Laboratory of Cryptology College of Science National University of Defense Technology

This paper presents our investigation of the implicit factorization problem, where unknown prime factors of two RSA moduli share a certain number of middle bits. The problem is described as follows. Let N;= p;q;, N;=p;q;be two different n-bit RSA moduli, where q;, q;are both αn-bit prime *** that p;, p;share tn bits at positions from t;n to t;n =（t;+ t）n. Then this problem focuses on the condition about t, α to factor N;, N;efficiently. At PKC 2010, Faug`ere et al. showed that N;, N;can be factored when t > 4α. Subsequently, in 2015, Peng et al. improved this bound to t > 4α-3α;. In this paper,we directly apply Coppersmith’s method to the implicit factorization problem with shared middle bits, and a better bound t > 4α-4α;is obtained. The correctness of our approach is verified by experiments.

关键词： RSA implicit factorization problem middle bits lattice Coppersmith’s method

GENERATE ROUGH TOOL-PATHS FROM UNORGANIZED POINT-CLOUD DIRECTLY

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Chinese Journal of Mechanical Engineering 2007年第5期20卷 1-4页

作者： WU shixiong wang Chengyong FAN Jingming School of Mechanical and Electrical Engineering Guangdong University of Technology Guangzhou 510006 China

An approach is presented to generate rough interference-free tool-paths directly from massive unorganized data in rough machining that is performed by machining volumes of material in a slice-by-slice manner. Unorganized point-cloud is firstly converted to cross-section data. Then a robust data-structure named tool-path net is constructed to save tool-path data. Optimal algorithms for partitioning sub-cut-areas and computing interference-free cutter-locations are put forward. Finally the tool-paths are linked in a zigzag milling mode, which can be transformed into a traveling sales man problem. The experiment indicates optimal tool paths can be acquired, and high computation efficiency can be obtained and interference can be avoided successfully.

关键词： Rough machining Tool path Unorganized point-cloud

The influence of inter-band rock on rib spalling in longwall panel with large mining height

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International Journal of Mining Science and Technology 2024年第4期34卷 427-442页

作者： Jiachen wang Meng Li Zhaohui wang Zheng Li Han Zhang shixiong Song School of Energy and Mining Engineering China University of Mining and Technology-BeijingBeijing 100083China Coal Industry Engineering Research Center of Top-coal Caving Mining Beijing 100083China Faculty of Engineering Hokkaido UniversitySapporo 060-8628Japan

In order to improve rib stability,failure criteria and instability mode of a thick coal seam with inter-band rock layer are analysed in this study.A three-dimensional mechanical model is established for the rib by considering the rock layer.A safety factor is defined foy the rib,and it is observed that the safety factor exhibits a positive correlation with the thickness and strength of the inter-band rock.A calculation method for determining critical parameters of the rock layer is presented to ensure the rib *** is revealed that incomplete propagation of the fracture at the hard rock constitutes a fundamental prerequisite for ensuring the rib *** influence of the position of the inter-band rock in the coal seam on failure mechanism of the rib was thoroughly investigated by developing a series of physical models for the rib at the face *** best position for the inter-band rock in the coal seam is at a height of 1.5 m away from the roof line,which tends to provide a good stability state for the *** different inter-band rock positions,two ways of controlling rib by increasing supports stiffness and flexible grouting reinforcement are proposed.

关键词： Rib spalling Inter-band rock Large mining height Limit analysis Physical model experiment Numerical simulation

On eco-planning for an eco-demonstration park (EDP) and sustainability-Case study of the Luhua EDP in the Chongming Island of Shanghai,China

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Frontiers of Environmental Science & Engineering 2008年第2期2卷 178-186页

作者： Xiangrong wang Yi YONG shixiong wang Hao ZHANG Hing Hon HO Pingjian wang Shoubing wang Weizhen CHEN Research Center for Urban Eco-Planning&Design Fudan UniversityShanghai 200433China Department of Biology State University of New York at New PaltzNew York 12561USA

Thebackground,concept,connotation,principles,andmethodsofeco-planningforanEco-Demonstration Park(EDP)and sustainability were examined based on a case study of the Luhua EDP in the Chongming Island of Shanghai,China,which is an important part of Shanghai Eco-city planning and construction in the 21st *** analyzing natural,social and economic conditions,calculating population using the land capacity eco-model,eco-function zoning,and eco-construction,an innovative eco-industrial structure and technical chain were formulated.A comprehensive eco-planning scheme for the EDP was proposed,including planning and management strategies for subsystems of efficient industry,good quality human settlement,high standard eco-construction and eco-tourism as well as effective environmental protection and attractive *** EDP should be an area with coordinated and sustainable economic,social and environmental ***-planning for the EDP should be a very important part of eco-city planning and *** paper aims to set up a theoretical framework and practical basis for eco-planning and promoting harmony between human and nature.

关键词： eco-demonstration park(EDP) eco-planning eco-model Luhua Chongming Island Shanghai

Ecological restoration for river ecosystems: comparing the Huangpu River in Shanghai and the Hudson River in New York

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Ecosystem Health and Sustainability 2015年第7期1卷 7-20页

作者： Xiangrong wang shixiong wang Guotao Peng Daniel S.W.Katz Huanran Ling Department of Environmental Science and Engineering Fudan UniversityShanghai 200433 China Bard Center for Environmental Policy Bard CollegeP.O.Box 5000AnnandaleNew York 12504 USA Department of Earth and Environment Boston UniversityBostonMassachusetts 02215 USA

Starting in the 1960s,a great deal of effort and capital was invested in an endeavor to significantlyimprove the quality of surface water around the United States,particularly in metropolises like New YorkCity,New *** Hudson River has been at the forefront of these efforts and has benefited immenselyfrom this *** parts of the developing world,such as China,similar efforts are beginning to gatherthe same type of *** the past decade,the Huangpu River,which flows through Shanghaiinto the Yangtze Estuary of China,has been a target for ecological restoration and *** is possibleto draw parallels between the cleanup efforts involved in improving the environmental conditions of theHuangpu and Hudson *** the methodologies of series comparison(SCM),water quality index(WQI)modeling,consideration of ecological engineering,and policy strategy design,we comparativelystudied the topography,functions,environmental conditions,ecological engineering countermeasures,andmanagement policies of the two rivers to assist future forecasting of ecological restoration efforts in China.

关键词： ecological restoration Huamgpu River,China Hudson Riover,Newo York,ISA mamngement policy river ecosystem Shanghai,China water quality index(WQI)modeling

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双轨式钢轨超声检测系统的设计与应用

无损检测 2024年第6期46卷 77-83页

作者：张海山杨雄伟马红斌王世雄章罕中国铁路青藏集团有限公司西宁810000 合肥超科电子有限公司合肥230088

当前的钢轨焊缝检测一般采用便携式超声检测仪进行人工检测,检测效率低,劳动强度大。受钢轨的工字型结构及轨底扣件的影响,钢轨焊缝的自动化检测一直难以实现。为了实现对钢轨焊缝的自动化检测,首先在双轨式钢轨超声检测系统中增加了串... 详细信息

当前的钢轨焊缝检测一般采用便携式超声检测仪进行人工检测,检测效率低,劳动强度大。受钢轨的工字型结构及轨底扣件的影响,钢轨焊缝的自动化检测一直难以实现。为了实现对钢轨焊缝的自动化检测,首先在双轨式钢轨超声检测系统中增加了串列式扫查功能,采用轮式探头取代人工焊缝检测中的串列式扫查,可以和钢轨母材检测同时进行;其次,研发了一种采用机械臂的轨底扫查设备并将其安装于双轨式钢轨超声检测仪上,同样采用轮式探头可实现对焊缝轨底的快速检测,利用轮式探头的良好耦合性实现了对钢轨焊缝的全断面自动化检测,并在现场检测作业中验证了检测效果。结果表明,所设计的自动检测系统可取代人工焊缝检测,显著提高劳动效率。

关键词：串列式扫查轨底焊缝检测焊缝检测