一起电梯运行中对重框脱轨事故的分析

介绍了一起曳引驱动电梯运行中对重框脱轨的事故。结合电梯随机文件内的井道布置图和现场观察测量,并依据相关国家标准和安全技术规范的要求,分析了对重框脱轨运行的原因。最后提出了防范对重脱轨的具体措施。

压重顶进框构下穿高铁引起桥墩变形及控制技术

以某高速公路下穿京沪高铁工程为例,提出一种基于"卸载-加载平衡"理念的压重顶进框构方案,并对高铁桥墩变形及控制技术进行研究。结果表明,高速公路在高铁桥下开挖10 m深,开挖体量近10万方。采用压重顶进框构方案,施工中边顶进、边监测、边通过框顶堆土、桥下堆土、框内留土等措施加载压重,可有效控制高铁的隆起变形。在通车运营3个月后,高铁相邻桥墩累计最大差异沉降为2.7mm,距离规范限值留有46%的余量,满足规范要求。轨检表明,无砟轨道平顺性满足运营要求。对比分析表明,数值模型中粉质黏土压缩模量可采用P0~P0+100 kPa(P0为土体自重应力)应力区间对应的模量值,卸载模量可取为压缩模量的3~5倍。

“有限”到“无界”:山东地区汉代画像石边框形式与叙事空间

汉代画像石是汉代重要的墓葬文化和图像艺术的载体,在中国范围内从北向南,呈区别且相联的多种图像及刻绘风格。山东地区是汉代画像石分布的主要区域之一,其刻画内容丰富、构图严谨。本文从艺术构成的形式(Formal)出发,结合山东邹城、济宁、临沂等地区的汉代画像石,重点分析其画面边框构成样式、“重框”现象与“出框”意义,并与江苏、安徽、四川等其他地区汉代画像石的边框形式加以对比,旨在探讨汉画像石的边框对画面从“有限”到“无界”叙事空间的表现关系,综合阐释画像石边框艺术形式的意义生成。

一起电梯对重侧双向剪切挤压安全事故

本文分析了重庆发生的一起电梯对重侧双向剪切挤压安全事故。电梯很多剪切挤压安全事故发生在电梯厅轿门侧,这类事故大家比较重视也比较熟悉,但对于对重侧的安全事故,很多人可能不太清楚,防范意识也不强,其实对重侧照样可能发生剪切挤压安全事故。本文通过一起特殊的对重侧安全事故的分析,说明了对重侧存在的一些安全风险及预防方法。

A New Criteria to Apply Weight-Dependent CATSthr to Cost-Benefit Analysis within the Framework of IMO EnvironmentaI-FSA Studies

The purpose of this paper is to investigate reasonable cost benefit criteria within the framework of environmental formal safety assessment （FSA）. In this study a statistical analysis of oil spill data was carried out based on the report of International Oil Pollution Compensation Funds. According to the statistical study of actual oil spill from tankers, it is found that collisions and groundings are the most probable causes of the oil spills from tankers. Probability distributions of costs of oil spill and oil spill amount are investigated, and a non-linear regression formula between costs of oil spills and oil spill weight are derived. Using the regression formula, an oil spill weight dependent CATStm （Cost of Averting a Ton of oil Spilt） is proposed. Moreover in order to apply the weight dependent CATSthr to cost benefit analysis （CBA）, a new cost-effective criterion is newly proposed with considering its concrete application to environmental FSA.

Structural and interfacial engineering of well‐defined metal‐organic ensembles for electrocatalytic carbon dioxide reduction

Electrochemical carbon dioxide reduction(CO_(2)RR)has been generally regarded as green technologies that can convert renewable energy such as sunlight and wind into fuels and valuable chemicals.However,the large‐scale implementation of CO_(2)RR is severely hindered by the lack of high‐performance CO_(2)RR electrocatalysts.Heterogeneous molecular catalysts and metal‐organic framework with well‐defined structure and high tunability of the metal centers and ligands show great promise for CO_(2)RR in terms of both fundamental understanding and practical application.Here,structural and interfacial engineering of these well‐defined metal‐organic ensembles is summarized.This review starts from the fundamental electrochemistry of CO_(2)RR and its evaluation criteria,and then moves to the heterogeneous molecular catalysts and metal‐organic framework with emphasis on the engineering of metal centers and ligands,their interaction with supports,as well as in situ reconstruction of metal‐organic ensembles.Summary and outlook are present in the end,with the hope to inspire and provoke more genuine thinking on the design and fabrication of efficient CO_(2)RR electrocatalysts.

RECONFIGURABLE RDMA COMMUNICATION FRAMEWORK OF MULTI-DSP

The processing speed of the communication between nodes in a parallel processor has become the major bottleneck of the processor's performance.RDMA(Remote Direct Memory Access) technology has drawn more attention recently due to its capability of transferring a larger amount of data, higher speed and reliability.4DSP(4 Digital Signal Processing) module comprised of Tiger-SHARC201 chip is connected by LVDS(Low Voltage Differential Signal) circuits.This paper proposes a general and reconfigurable RDMA platform and its corresponding communication protocol with all the routes linked based on the zero copy.The protocol transfers message of DSP by interrupting of DMA and is applied on massive remote image impression, which reduces memory needs and working burden of CPU.The experiment results show this platform is efficient, flexible, and expandable of being integrated to a larger scale in the next development stages.

Historical Building Renovation as a Construction Project

Approaches to building renovation require high professional levels, interdisciplinary elements, team work and time to study and do research on the buildings. The process of renovating historic buildings is made up of agreements and compromises between the interests of the government, common interests, and the motives and interests of individual owners and prospective investors. Research that deals with any portion of cultural heritages always carried out very precisely, but there is still no precise knowledge of how to define a system and draw up a model that accurately represents a cultural heritage. In the existing literature on this topic, the authors have written about the different views of how to explain the construction project as a system. While many authors focus on ＂sub-phases＂ directly connected to the building of an object, the process involved in the construction phase often neglects the phases required before beginning work, which culminates in a logical sequence in the process of preparing a project. Irregularities or deficiencies which occur during the preparation process of a project often directly impact the construction itself. What the scope of this impact depends on the approach of the contractual organization, the organization of construction companies and on co-operation between the customer （or architects） and the contractors. Unlike the projects for newly built objects, the conservation projects of cultural heritage are not only more demanding because of lack of knowledge of the building materials, construction, foundation and interaction of the mentioned individual parts into a unit called a building. The authors analyzed the structural aspects of building conservation which were suggested by Beckmaun and Bowles and another methodology, which was developed as part of the 5th framework program for the purpose of providing a comprehensive and interdisciplinary treatment of the revitalization of a historical city. The authors found that both methodologies do not include modern IT tools and methods. By analyzing and monitoring the restoration of historic buildings in Slovenia, specifically in the city of Maribor （including all documentation, interviews and direct views） the authors found that the project was regarded as a collection of individual projects rather than a unified whole （a system）. The authors have demonstrated the consequences of structuring a historic building restoration project in a non-systemic way. This type of project can be classified as a non-sustainable renovation. In this article, at first the authors will try to clarify what types of systems and subsystems are considered in renovating historic buildings. The authors show when and why a system becomes stochastic （a probability） and in the end what would be needed to successfully re-establish it back to a determined system. By analyzing the work and reconstruction of old buildings in Maribor, the authors found that it would be necessary to give a new framework with IT tools for the preparation of a historic building restoration project.

A water-stable metal-organic framework： serving as a chemical sensor of PO43– and a catalyst for CO2 conversion

A new 2D Eu-BTB framework(1) with stratified gridding structure of about 14.6×16.9was synthesized and characterized.Compound 1 displays excellent water stability with the pH 2–12. The luminescent investigations suggest that 1 could represent a chemical sensor of PO43. with high sensitivity and selectivity. Importantly, 1 as a sensor of PO_4^(3-) can be reused at least five times.On the other hand, the catalytic investigations of 1 were carried out, indicating that 1 could be demonstrated as a recyclable catalyst for CO_2 conversion with epoxides.

Study of Cold Fusion Reactions Using Collective Clusterization Approach

Within the framework of the dynamical cluster decay model （DCM）, the in evaporation cross-sections （σ1n） of cold fusion reactions （Pb and Bi targets） are calculated for ZCN = 104-113 superheavy nuclei. The calculations are carried out in the fixed range of excitation energy ECN = 15 ± 1 MeV, so that the comparative analysis of reaction dynamics can be worked out. First of all, the fission barriers （Bf ） and neutron separation energies （S1n） are estimated to account the decreasing cross-sections of cold fusion reactions. In addition to this, the importance of hot optimum orientations of β24-deformed nuclei over cold one is explored at fixed angular momentum and neck-length parameters. The hot optimum orientations support all the target-projectile （t,p） combinations, which are explored experimentally in the cold fusion reactions. Some new target-projectile combinations are also predicted for future exploration. Further, the In cross-sections are addressed for ZCN = 104-113 superheavy nuclei at comparable excitation energies which show the decent agrement with experimental data upto ZCN = 109 nuclei. Finally, to understand the dynamics of higher-Z superheavy nuclei, the cross-sections are also calculated at maximum available energies around the Coulomb barrier and the effect of non-sticking moment of inertia （INS） is also investigated at these energies.

Hierarchically porous composite fabrics with ultrahigh metal–organic framework loading for zero-energy-consumption heat dissipation

The long-term safe operation of high-power equipment and integrated electronic devices requires efficient thermal management,which in turn increases the energy consumption further.Hence,the sustainable development of our society needs advanced thermal management with low,even zero,energy consumption.Harvesting water from the atmosphere,followed by moisture desorption to dissipate heat,is an efficient and feasible approach for zero-energy-consumption thermal management.However,current methods are limited by the low absorbance of water,low water vapor transmission rate(WVTR)and low stability,thus resulting in low thermal management capability.In this study,we report an innovative electrospinning method to process hierarchically porous metal–organic framework(MOF)composite fabrics with high-efficiency and zero-energy-consumption thermal management.The composite fabrics are highly loaded with MOF(75 wt%)and their WVTR value can be up to 3138 g m^(-2) d^(-1).The composite fabrics also exhibit stable microstructure and performance.Under a conventional environment(30℃,60%relative humidity),the composite fabrics adsorb water vapor for regeneration within 1.5 h to a saturated value Wsat of 0.614 g g^(-1),and a corresponding equivalent enthalpy of 1705.6 J g^(-1).In the thermal management tests,the composite fabrics show a strong cooling capability and significantly improve the performance of thermoelectric devices,portable storage devices and wireless chargers.These results suggest that hierarchically porous MOF composite fabrics are highly promising for thermal management of intermittent-operation electronic devices.