内蒙古某金矿区韧性剪切带及其与金矿化的关系

内蒙古某金矿区发育ＮＷＷ向韧性剪切带，糜棱岩分带明显，由糜棱岩化岩石、糜棱岩和糜棱片岩组成．根据韧性剪切带内Ｓ∧Ｃ夹角、拉伸线理及Ｓ型组构指示韧性剪切带在平面上具右行剪切特征．剪切应变值４．５～５．７，应变性质以简单剪切为主的平面应变兼有压扁变形特征．野外观察，岩石薄片鉴定及岩石化学分析表明，岩石明显发生退化变质现象，剪切带边部到中心，矿物和化学成分都发生了明显变化，ＳｉＯ２、Ｆｅ２Ｏ３、Ｎａ２Ｏ在剪切带中心明显降低，ＭｇＯ、ＣａＯ、Ｋ２Ｏ在剪切带中随变质变形强度增加而增加．金矿床沿韧性剪切带分布，含金石英脉和含金蚀变岩金矿体明显受剪切带控制．金矿化与韧性剪切作用、韧性剪切退变质作用及后期脆性构造叠加和中酸性岩浆活动有关，说明本区金矿的形成是多阶段成矿作用的结果．     

FRP在砌体墙抗震(加固)中的应用

FRP具有轻质、高强、高弹模等许多优点,用其加固砌体具有无可比拟的优势和潜力,介绍了国内外FRP加固砌体墙体试验和数值模拟试验,通过墙体各项性能的改变,提高墙体抗震性能。     

浅析高层剪力墙结构免抹灰施工技术

随着社会的发展,建筑规模和体量变大,高层住宅楼以现浇钢筋混凝土最为常见,如果粉刷,极其容易造成空鼓、裂缝等,而且会造成工期延误,材料浪费。本文以国营第七九五厂华星新家园1#住宅楼工程为例,对现浇混凝土剪力墙结构工程免抹灰施工技术进行了相关探讨。     

框架结构加固的实际应用

工业厂房经常会出现因腐蚀或加载而导致结构的承载力不足,从而要对结构进行加固,同时由结构加固的原理引出一系列问题的思考。     

上部无砌体挑梁与砌体开裂原因分析及优化方案

上部无砌体时的挑染，结构计算通常采用简支方案，在其根部与砌体接触面之间易出现裂缝。文章分析了裂经同现的力学原因。并根据力学理论提出了改进办法－采用固端方案。从而大大降低了这类裂缝出现的可能性。     

高层建筑梁柱节点强度等级混凝土不同时的施工方法

随着我国城市化进程的加快，高层建筑随处可见，但是高层建筑框架梁柱节点区混凝土如何浇筑才能满足承载力要求，是长期困扰设计和施工人员的问题，文章为此总结出一种节点区简易施工方法。     

Surgical treatment,complications, and reimbursement among patients with clavicle fracture and acromioclavicular dislocations: a US retrospective claims database analysis

Abstract

Aims: To assess rates of surgical treatment, post-surgical complications, reoperations, and reimbursement in patients with clavicle fractures and acromioclavicular (AC) dislocations.

Materials and methods: This US retrospective study used data from patients with ≥1 diagnosis of clavicle fracture or AC dislocation (index) between 2012–2016. Surgical treatment was defined as a procedure within 4 weeks after clavicle fracture/AC dislocation. Rates of complications (infection, non-union, mal-union), reoperations (device removal or revisions), and all-cause healthcare reimbursement (adjusted to 2016$) were evaluated 2 years post-index among surgical patients.

Results: A total of 95,243 patients with clavicle fracture and 52,100 patients with AC dislocation were identified. Mean (SD) age for clavicle fracture and AC dislocation was 23.8 (18.6) and 33.0 (15.6) years, respectively. Most clavicle fracture and AC dislocation patients were male (70.9% and 78.0%, respectively), and had few comorbidities (86.4% and 84.8% had a Charlson Comorbidity Index?=?0 and 73.1% and 66.0% had Elixhauser?=?0, respectively). Only 15.2% of clavicle fracture and 5.3% of AC dislocation patients received surgical treatment. Among patients undergoing surgical treatment, 2-year rates of infection, non-union, and mal-union were 1.0%, 4.2%, and 0.9%, respectively, for clavicle fracture, and 2.0%, 0.9%, and 0.1%, respectively, for AC dislocation. Reoperations occurred in 83.0% of clavicle fracture and 67.5% of AC dislocation patients. Mean (SD) 2-year reimbursement was $27,635 ($68,173) for clavicle fracture and $23,096 ($28,746) for AC dislocation.

Limitations: Administrative claims data lack clinical information, limiting inferences that can be made. This data may not be generalizable to other patients.

Conclusions: Rates of surgical treatment for clavicle fractures and AC dislocation and rates of infection, non-union, and mal-union among surgically-treated patients were low. However, surgical patients had high rates of device removal or revision surgery during 2-year follow-up. Improved surgical methods and technologies could reduce non-planned reoperations and device removals, thereby reducing healthcare system costs.     

压裂工艺现场施工的质量控制措施

水力压裂是油井实现增产增储、水井实现增注的强有力措施之一。在国内外,水力压裂工艺目前已经非常成熟,但工艺现场施工这个环节的质量控制手段还有待进一步的完善。通过分析华北油田碳酸岩盐水力压裂施工中出现的问题,探讨了如何确保压裂工艺现场施工质量,实现设计与实际的有效衔接。     

玉裂支撑剂（陶粒）破碎率检测影响因素研究

油田压裂支撑剂（陶粒）的破碎率指标是关键技术指标。在按照石油行业标准进行产品质量检测时,压裂支撑剂的潮湿度以及破碎试验筒的硬度等这些对破碎率指标有影响的因素往往被忽视。检测人员通过大量的对比试验证明．支撑剂的潮湿度以及破碎试验筒的硬度对压裂支撑剂（陶粒）破碎率指标有一定影响,当检测数据处于边缘数据时,这些影响因素对产品质量结果的判定起到关键作用。     

浅析砌体结构裂隙的成因和控制

结构裂隙控制看着是一个比较简单、普遍存在的问题,但却是一门与力学、热工学、材料学等专业知识关系十分密切的综合性学科,是建筑工程中确保工程质量不容忽视的重要环节。在该领域中,目前国内尚无统一的规范和技术指标可循。本文仅从一般理论和多年实践经验方面,通过对砌体结构裂隙成因的分析,阐述控制裂隙的措施和加固方法。