Weld Joint Efficiency of the Kazakhstani Constructional Steel

In the Republic of Kazakhstan, the regulatory framework in construction based on Eurocodes has been in force since 2015. However, Kazakhstani produced steel has not been studied for compliance with the requirements of Eurocode 1993. This has resulted in limited use of Kazakhstani structural steel in construction. The feasibility of using structural steel in welded joints has been experimentally investigated. To verify the application of such joints in construction, including earthquake engineering, experimental studies of welded joints made of structural steel produced by Arcelor-Mittal in Temirtau have been carried out. In total, 7 types of structural steel of various thicknesses were selected. Five specimens have been used in each series of tests. The Brinell hardness values of the weld joint, yield strength of steel and tensile strength, relative rupture strain were determined. It was found that for all types of structural steel, the quality of weld joints complied with the requirements of Eurocode 1993—a sample rupture appeared along the plates (main body of the metal), not along the weld joints. It has been established that structural steel produced in the Republic of Kazakhstan fully complies with the requirements of Eurocode 1993. The studies on the dependence of Brinell hardness values of weld joint steel on the yield strength, tensile strength and relative rupture strain have been carried out. The correlation dependences between the values of yield strength of steel and tensile strength, relative rupture strain and BH Brinell hardness were studied. The results of work will allow for significantly increasing the use of Kazakhstani structural steel in seismic and conventional areas of the Republic of Kazakhstan.

Cyclic Shear Tests on Key Connection Joints of Modularized Constructions

Modularized construction is a new type of prefabricated building system with green environmental protection and excellent performance. There are few studies on the seismic performance of its key connection joint. This paper presents a new type of assembled connection joint for the high-rise modularized construction. Cyclic shear tests of full-scale joints were carried out, and the key indexes of their seismic performances including the hysteretic performance, ductility, and energy dissipation capacity were analyzed and obtained. The results show that the hysteresis loops of longitudinal and lateral cyclic shear tests were both plump in shapes. The ductility coefficients were 4.54 and 4.98, and the energy dissipation coefficients were 1.83 and 1.43, respectively. The test joint had good ductility and energy dissipation capacity. The positions of yield failure of specimens were mainly concentrated in the connection areas between the column and short beam or end-plate. The research can provide the technical reference for the seismic design and engineering application of related modularized constructions.

Can periprosthetic hip joint infections be successfully managed by debridement and prosthesis retention?

To evaluate the current literature about how successfully periprosthetic hip joint infections can be managed by debridement and prosthesis retention.A literature search was performed through Pub Med until September 2013.Search terms were"DAIR(debridement,antibiotics,irrigation,and retention)"alone and in combination with"hip"as well as"hip infection+prosthesis retention".A total of 11 studies reporting on 292 cases could be identified.Five different treatment modalities have been described with varying success rates(debridement-21%infection eradication rate;debridement+lavage-75%infection eradication rate;debridement,lavage,with change of modular prosthesis components-70.4%infection eradication rate;debridement,lavage,change of modular prosthesis components+vacuum-assisted closure-92.8%infection eradication rate;acetabular cup removal+spacer head onto retained stem-89.6%infection eradication rate).With regard to the postoperative antibiotic therapy,no general consensus could be drawn from the available data.Debridement,antibiotic therapy,irrigation,and prosthesis retention is an acceptable solution in the management of early and acute hematogenous periprosthetic hip joint infections.The current literature does not allow for generalization of conclusions with regard to thebest treatment modality.A large,multi-center study is required for identification of the optimal treatment of these infections.

New Adhesive Material for Construction Joint of Tunnel Lining

The new adhesive material for the construction joints of tunnel lining(named as SZC) was studied based on the structural characteristics of interfaces and the characteristic of bonding construction, and the performance indexes were verified by tests. The experimental results show that the adhesive capability of interface is improved effectively by using SZC material, the properties, such as anti-freezing, erosion-resistance and anti-shrinkage are improved greatly as well as durability.

All-out Startup of Construction of Sino-Kuwait Integrated Refining/Petrochemical Joint Venture Project

On December 20,2016 the construction of the SinoKuwait Guangdong integrated refining/chemical join venture project,which is the largest Sinopec’s projec under construction and also the key construction project of Guangdong province,had been kicked off comprehensively.This project is located in the new district of the East Sea Island inside the Zhanjiang Economic Development

Treatment of acute periprosthetic infections with prosthesis retention: Review of current concepts

Periprosthetic joint infection(PJI) is a devastating complication after total joint arthroplasty, occurring in approximately 1%-2% of all cases. With growing populations and increasing age, PJI will have a growing effect on health care costs. Many risk factors have been identified that increase the risk of developing PJI, including obesity, immune system deficiencies, malignancy, previous surgery of the same joint and longer operating time. Acute PJI occurs either postoperatively(4 wk to 3 mo after initial arthroplasty, depending on the classification system), or via hematogenous spreading after a period in which the prosthesis had functioned properly. Diagnosis and the choice of treatment are the cornerstones to success. Although different definitions for PJI have been used in the past, most are more or less similar and include the presence of a sinus tract, blood infection values, synovial white blood cell count, signs of infection on histopathological analysis and one ormore positive culture results. Debridement, antibiotics and implant retention(DAIR) is the primary treatment for acute PJI, and should be performed as soon as possible after the development of symptoms. Success rates differ, but most studies report success rates of around 60%-80%. Whether single or multiple debridement procedures are more successful remains unclear. The use of local antibiotics in addition to the administration of systemic antibiotic agents is also subject to debate, and its pro's and con's should be carefully considered. Systemic treatment, based on culture results, is of importance for all PJI treatments. Additionally, rifampin should be given in Staphylococcal PJIs, unless all foreign material is removed. The most important factors contributing to treatment failure are longer duration of symptoms, a longer time after initial arthroplasty, the need for more debridement procedures, the retention of exchangeable components, and PJI caused by Staphylococcus(aureus or coagulase negative). If DAIR treatment is unsuccessful, the following treatment option should be based on the patient health status and his or her expectations. For the best functional outcome, one- or two-stage revision should be performed after DAIR failure. In conclusion, DAIR is the obvious choice for treatment of acute PJI, with good success rates in selected patients.

Large-scale model test study on the water pressure resistance of construction joints of karst tunnel linings

Model tests and numerical calculations were adopted based on the New Yuanliangshan tunnel project to investigate the water pressure resistance of lining construction joints in high-pressure and water-rich karst tunnels.A large-scale model test was designed and conducted,innovatively transforming the external water pressure of the lining construction joint into internal water pressure.The effects of the embedded position and waterstop type on the water pressure resistance of the construction joint were analyzed,and the reliability of the model test was verified via numerical calculations.The results show that using waterstops can significantly improve the water pressure resistance of lining construction joints.The water pressure resistance of the lining construction joint is positively correlated with the lining thickness and embedded depth of the waterstop.In addition,the type of waterstop significantly influences the water pressure resistance of lining construction joints.The test results show that the water pressure resistance of the embedded transverse reinforced waterstop is similar to that of the steel plate waterstop,and both have more advantages than the rubber waterstop.The water pressure resistance of the construction joint determined via numerical calculations is similar to the model test results,indicating that the model test results have high accuracy and reliability.This study provides a reference for similar projects and has wide applications.

深化职业教育产教融合的关键是实现跨界组织实体化运作

深化产教融合是职业教育实现高质量发展的核心举措。改革开放以来,我国职业教育产教融合在政策牵引和实践演绎的相互作用下,展现了由松散到紧密、由浅层次到深层次的演变历程。但长期以来,产教“融而不合”、校企“跨而不实”的现实困境始终难以破题。伴随市域产教联合体、行业产教融合共同体等新型产教跨界组织的产生与发展,以制度突破为基本前提,推进跨界组织的实体化运作成为深化职业教育产教融合的关键。而实现这一点,需要跨界组织具有符合实际的组织结构、发挥实效的主导权力、约束有力的职责分工、稳定的利益共享机制、有效的激励保障政策,也需要多方主体协同有效的共建共治。

创建行动导向下美丽乡村联创联建的规划设计方法探索

伴随着浙江省乡村发展愿景从“千万工程”到“美丽乡村”再到共同富裕的纵深推进,以单个行政村为单元的美丽乡村创建模式已经难以适应新的发展诉求。基于自然资源禀赋或基础设施地理空间连续性的美丽乡村联创联建工作,是破解各行政村独立发展的多重瓶颈的创新性尝试。针对具有明确的目标、资金、时间约束的美丽乡村创建行动,基于“产业-空间协同发展”的总体思路,试图探讨一种面向美丽乡村联创联建的规划设计方法,即“二阶三心法”。这一方法从乡村地区的存量资源切入,旨在系统性、创造性地回应创建行动目标,开展面向产业-空间复合型目标的空间规划干预:一是基于“土地矛盾最小化原则”进行空间节点设计,二是基于“空间投入-融合效益最大化原则”形成特色主线,三是基于“优先塑造-示范带动原则”打造示范样板。进一步的,结合湖州市道场乡菰城片区规划设计工作,探讨了该方法在产业策划和空间设计层面落地应用的关键问题和解决策略,为中国先发地区美丽乡村联创联建的规划设计工作提供经验借鉴。

基于高校党建引领的产学研协同育人创新模式

根据产学研协同育人目标任务,从高校党建引领的角度,探索实践校政企“智联建”的产学研协同育人创新模式。本文深刻把握校政企“智联建”的研究背景,从高校学科发展任务需求出发,发挥高校党建引领作用,结合燕山大学机械工程学院校政企“智联建”的具体实践,提供高校党建工作与产学研协同育人的融合模式与方法,并对未来工作提出思考。

深港共建区域知识产权贸易中心的挑战和应对策略

为了发挥香港地区在粤港澳大湾区高质量发展中的知识产权贸易中心地位,中共中央、国务院印发《粤港澳大湾区发展规划纲要》,特别提出支持香港地区成为区域知识产权贸易中心。目前,香港地区建设区域知识产权贸易中心面临着建设目标和路径不明晰、有效支撑不足、统计体系不完善、政策不明确等挑战,亟需将深港共建区域知识产权贸易中心明确为国家级战略,完善知识产权贸易统计体系,出台支持政策,营造良好生态,合力提升国际影响力。

基于改进免疫遗传算法的建设项目应急预案优化

为了提高建设项目应急预案的针对性,基于改进免疫遗传算法对建设项目应急预案优化进行仿真研究。首先,借鉴生物免疫原理,构建建设项目应急预案优化理论模型;其次,通过设计Taguchi试验优化算法中的重要参数,引入精英保留策略改进免疫遗传算法,并基于该算法构建建设项目应急预案优化模型;最后,以某高速公路为例,运用MATLAB软件进行模拟仿真,测试改进免疫遗传算法的可行性,并设置两组对比实验验证改进免疫遗传算法的优越性。仿真结果表明:相比于传统免疫遗传算法,改进免疫遗传算法下应急预案的亲和度更高,收敛速度也更快。这拓展了项目风险研究,为风险应对决策提供参考依据。

地下连续墙新型刚性接头设计与研究

城市建设的快速发展促使对地下空间的需求日益增加,地下连续墙作为深大基坑的支护或结构外墙的应用也越来越多。针对“两墙合一”的地下连续墙,提出了一种新型刚性接头、防绕流接头板及施工工艺,能有效预防混凝土绕流问题,进而提高地下连续墙的整体刚度、强度以及接头的止水能力。通过数值模拟计算了刚性接头的承载力与延性,并与普通工字钢接头进行了对比。结果表明,采用新型刚性接头的地下连续墙,具有较好的刚度和受力性能,施工可行性高,具有较好的应用和推广前景。总结的经验可供今后类似工程借鉴。

煤化工装置法兰接头密封泄漏评估管理系统研发

煤化工装置中螺栓法兰接头的泄漏问题一直是安全和环保管理的关键挑战。为解决此问题,文中设计并开发了涵盖了数据收集管理、密封泄露检测及修复、LEC泄漏风险评估及统计分析等功能的评估管理系统。通过该系统,可以实时监测密封泄漏、进行数据分析评估,并采用LEC评价法进行风险评估。系统业务模块面向不同管理层级的需求,有助于提高煤化工装置法兰接头密封泄漏评估管理的科学性和效率。系统致力于提高装置的密封性能、降低泄漏风险、合理配置检维修资源,从而实现装置的长周期运行。

美欧印全球基建计划对一带一路的影响及应对

在“一带一路”建设深入推进和效应显现之际,美欧印等主要经济体连续发布全球性基础设施投资建设计划,标志着美西方对“一带一路”倡议的战略围堵进入新阶段,使共建“一带一路”面临更多外部风险及现实挑战。要深刻认识共建“一带一路”的独特战略价值,继续坚定不移推动共建“一带一路”高质量发展;分类施策,突破美欧印全球基建计划对我的“合围”;巩固共建“一带一路”建设十年形成的基本盘;多维度推动数字丝绸之路、绿色丝绸之路、健康丝绸之路建设;加快“一带一路”规则标准体系建设;全面加强“一带一路”话语体系建设,推进共建“一带一路”更加行稳致远。

多功能一趟管联作高效修井技术研究与应用

为缩短作业占时,提高修井效率,控减劳务费用,实现降本增效,提出“一趟管修井”优化设计方法,研发“不动管联作”系列技术,建立“多工序集成”作业提速新模式。通过优化整合一趟管联作管柱设计,创新研发多功能组合工具串,形成了射孔下泵联作、冲洗下泵联作、压裂下泵联作、丢手下泵联作、修井一趟管联作等五大类共十项联作技术。实现了只利用一趟管柱即可完成传统技术上需要起下三趟管柱作业工序的工作量,在达到同样作业目的前提下,还解决了带压起下管过程井口冒喷污染、井控风险高等技术问题。联作技术已在江汉油区累计推广152井次,累计减少起下换管74.4×10^(4) m,单井平均缩短作业占时26 h,降低修井费用￥3.5万元,提高修井效率约30%。

快递进村倡议下“邮快合作”主体博弈关系研究

快递进村具有成本高和效率低的困难,邮政与民营快递企业在共建配送中心、开展共同配送业务等方面进行合作,是解决这一问题的重要手段。因此围绕共建共配的邮快合作模式,分析了邮政快递企业和民营快递企业之间的合作和博弈关系,并构建了演化博弈模型,选取某区的实际数据作为算例,探讨不同因素对合作稳定性的影响以及政府政策在邮快合作中所起的作用效果。结果表明:邮政占据主导地位对推进快递进村具有一定优势,政府推进邮快合作的政策补贴应考虑多种补贴形式。

广西特色农产品电商发展与职业教育现状分析及对策研究

广西特色农产品电商产业已成为广西农业发展新增长极,电商规模和产值不断提升,电商品牌价值和创新速度加快,冷链物流智能化凸显。相关电商专业人才需求缺口加大,职业教育是电商人才主要来源,亟待优化电商职业教育布局和人培定位,建立“农+电+职”的三方联动模式,提升职业教育竞争力,为广西特色农产品电商发展增添助力。