2*500t跨墩提梁机安全拆除技术

2*500t跨墩提梁机自重、跨度、净高都较大,拆除存在较大安全风险.本文系统总结了京沪客专云龙梁厂2*500t跨墩提梁机的拆除技术,可为类似工程提供参考.     

Maximum likelihood and optimum location of observation sites in geodetic and spatial surveying

In geodetic and spatial surveying, accurate statistical es-timates of the Cartesian coordinates of a stationary target depend, in general, on such factors as target position, number and type of instruments, their location, their accuracy, and their mix. Direct measurements are assumed to be made in elevation, azimuth, and range with errors independently and normally distributed. For a mix of instruments, theoretical arguments are established using maximum likelihood estimation to determine the optimal siting of the instruments which minimizes (GDOP)² or the square of the geo-metric dilution of precision = sum of the variances of the estimates in the three orthogonal directions.     

第16届世锦赛中国男排进攻得失分情况研究

中国男排在第16届世锦赛中成绩并不理想,与世界强队之间存在很大差距,主要表现为：强攻不强;传统战术快攻体现不出优势;后排进攻主要集中在1号位和6号位,1号位成功率较低;中国队的拦网相对较弱.     

The interface of the top management team and the board: A dynamic managerial capabilities perspective

Although top management teams use their human capital, social capital, and cognition (i.e., dynamic managerial capabilities) to drive strategic change in their firms, faultlines within these teams may dampen the strategic change that they produce. While boards can enable but also restrict these change efforts, we know little about how precisely a board's monitoring and advice-giving condition the impact of the top management team's dynamic managerial capabilities on strategic change. We clarify how intense monitoring and advice-giving affect strategic change when faultlines between the top management team's and board's dynamic managerial capabilities are more or less salient. We explain that intense monitoring further stifles both the breadth and speed of strategic change that can be accomplished, and that this is more pronounced when the faultlines between the two bodies are strong. Furthermore, we outline that intensive advice-giving can be beneficial in improving the breadth of strategic change, but more so when these faultlines are weak and less so when they are strong. Notably we illuminate that the reverse happens in terms of speed of strategic change: intensive advice-giving can be detrimental engendering a further dampening of strategic change speed which is more pronounced when these faultlines are strong but less when they are weak.     

Evaluation capacity building (ECB) interventions and the development of sustainable evaluation practice: An exploratory study

Evaluation capacity building (ECB) is a practice that can help organizations conduct and use evaluations; however, there is little research on the sustainable impact of ECB interventions. This study provides an empirical inquiry into how ECB develops sustained evaluation practice. Interviews were conducted with 15 organizational leaders from non-profits, higher education institutions, and foundations that “bought in” to ECB and were at least six months removed from an ECB contract. The result of this work highlights how sustained evaluation practice developed over time and what these practices looked like in real-world settings. A developmental, iterative cycle for how ECB led organizations to sustain evaluation practice emerged around key components to sustainability. First, leadership supported ECB work and resources were dedicated to evaluation. Staff began to conduct and use evaluation, which led to understanding the benefits of evaluation, and promoted value and buy-in to evaluation among staff. Common barriers and emerging sustainability supports not previously identified by ECB literature—the “personal” factor and ongoing ECB practitioner contact—are described. Practical tips for ECB practitioners to promote sustainability are also detailed.     

Tourist number prediction of historic buildings by singular spectrum analysis

A wooden historic building located in Tibet, China, experienced structural damage when subjected to tourists visit. This kind of ancient building attends to too many visitors every day because heritage sites never fail to attract tourists. There should be a balance between accepting the visitors and the protection of historic buildings considering the importance of the cultural relics. In this paper, the singular spectrum analysis (SSA) is used for forecasting the number of tourist for the building management to exercise maintenance measures to the structure. The analyzed results can be used to control the tourist flow to avoid excessive pedestrian loading on the structure. The relationship between the measured acceleration from the structure and the tourist number is firstly studied. The root-mean-square (RMS) value of the measured acceleration in the passage route of the tourist is selected for forecasting future tourist number. The forecasting results from different methods are compared. The SSA is found slightly outperforms the autoregressive integrated moving average model (ARIMA), the X-11-ARIMA model and the cubic spline extrapolation in terms of the RMS error, mean absolute error and mean absolute percentage error for long-term prediction, whereas the opposite is observed for short-term forecasting.     

中小学书法教育目标刍议

目前我国对于书法教育的意义、目标、方法、实践等缺乏清晰统一的理念，同时也因为师资力量的缺乏而使得很多学校的书法课有名无实，而书法教育中的名利思想也影响着教育者对书法艺术的理解与深入，这使得书法课程并没有能够充分发挥其作用。文章溯本求源，对“写字”与“书法”、“写字课”与“书法课”的关系进行反思，对于书法给人带来的心智的开启进行探讨，从而揭示中小学书法教育目标的真正所在。     

论建筑与摄影的视觉文化特性

伴随着经济的发展,中国建筑的实用问题已经得到了很好的解决,但建筑设计的美观问题却迟迟没有解决;在坚持建筑设计坚固、实用、美观三原则的基础上,探讨了建筑的视角美与建筑文化的关系;认为建筑应当为大众而设计,为民族文化的发展而设计;建筑与摄影的视觉造型共性,决定了建筑摄影将要成为鉴别建筑是否美观的标准之一,而建筑摄影也必将成为建筑设计的辅助造型设计手段。     

Contradictory Logics in Asset‐building Discourse: Habits,Identities and Discipline

Asset‐building as an anti‐poverty policy emphasizes helping the poor to save and accumulate wealth so as to promote future financial well‐being. This article focuses on how asset‐building discourse is practiced at the frontlines and its implications for how workers come to address issues of poverty. Drawing on qualitative data from a case study of a matched savings programme in the USA, the study finds that asset‐building discourse as enacted by workers is fundamentally contradictory: it promotes the idea that the poor can acquire financial literacy, but simultaneously works to discipline the poor to thoughtlessly save out of habit. More priority is placed on inculcating the habit of saving rather than teaching economically rational decision‐making. These findings indicate that asset‐building is consistent with a neo‐liberal outlook that focuses on disciplining the poor to be market compliant irrespective of whether their participation in market‐based activities effectively addresses the challenges of living in poverty.     

The Family Team at Boston Healthcare for the Homeless Program: an integrated approach to care in outreach settings

Since 1986, the Family Team at Boston Health Care for the Homeless Program has implemented an integrated, inter-professional, team-based model of care to serve families experiencing homelessness. The Family Team employs key strategies delineated by the well-established Health Care for the Homeless model, which emphasizes the importance of outreach medicine and a case management “one-stop shop approach”. We include an account of a specific case where the Family Team’s unique model helped a refugee family in Massachusetts access medical and social services otherwise more difficult to obtain. The Family Team’s onsite presence in the hotel-shelter and the team-based approach facilitated diagnosis of and successful treatment for cervical cancer in a mother of eight children. This case report suggests that the Health Care for the Homeless model of care should be more widely adopted in order to best serve homeless families.

Abbreviations: Boston Health Care for the Homeless Program (BHCHP); Emergency Assistance (EA); Health Care for the Homeless (HCH); Massachusetts General Hospital (MGH)