多重心分段法在两井特大型贯通测量中应用

为了充分利用两井现有生产系统及设施,达到优化开采煤炭资源,潘二矿与潘四东矿进行两井系统巷道间的特大贯通工程,为确保贯通,我们综合利用了GPS、陀螺仪、全站仪等先进设备,结合并矿工程设计方案,采用多重心分段法进行分段处理平衡误差累积,首次应用在我矿长距离、高精度的两井之间贯通工程,取得了显著的成功。该方法具有坐标测算精度高,误差累积可控制性好,贯通预计方法科学合理可靠性高。

多重性心电阶梯现象1例

多重性心电阶梯现象指同一起搏点某波形振幅是渐小或渐大且反复周期性出现的现象.在国内文献还未见类似的报道.属罕见的交替类型.我们发现多重性心电阶梯现象1例,现报告如下.

Simultaneous multiple coronary arteries thrombosis in patients with STEMI

Simultaneous thrombosis affecting more than one coronary artery has been reported to occur in about 4.8% of the cases at the time primary percutaneous coronary intervention （PCI）. Simultaneous multiple coronary arteries throm-bosis is uncommon and can lead to a fatal outcome. Careful attention should be given to identification of abnormal ECG and coronary angiography （CAG） results. The affected ves- sel should be opened timely and efficiently in an effort to save the myocardium and reduce serious complications such as congestive heart failure, ventricular arrhythmia, cardiogenic shock, or sudden cardiac death.

Service Function Chain Orchestration across Multiple Clouds

Network function virtualization is a new network concept that moves network functions from dedicated hardware to software-defined applications running on standard high volume severs. In order to accomplish network services, traffic flows are usually processed by a list of network functions in sequence which is defined by service function chain. By incorporating network function virtualization in inter-data center(DC) network, we can use the network resources intelligently and deploy network services faster. However, orchestrating service function chains across multiple data centers will incur high deployment cost, including the inter-data center bandwidth cost, virtual network function cost and the intra-data center bandwidth cost. In this paper, we orchestrate SFCs across multiple data centers, with a goal to minimize the overall cost. An integer linear programming(ILP) model is formulated and we provide a meta-heuristic algorithm named GBAO which contains three modules to solve it. We implemented our algorithm in Python and performed side-by-side comparison with prior algorithms. Simulation results show that our proposed algorithm reduces the overall cost by at least 21.4% over the existing algorithms for accommodating the same service function chain requests.

C^1 C^2INTERPOLATION OF SCATTERED DATA POINTS

In this paper an error in[4]is pointed out and a method for constructingsurface interpolating scattered data points is presented.The main feature of the methodin this paper is that the surface so constructed is polynomial,which makes the construction simple and the calculation easy.

Multiple Social Networks in Grassroots Governance in Rural China

Existing research on grassroots rural governance in China adopts a network perspective to explore the role of traditional social vehicles including clans,clan clusters and popular beliefs in improving village governance.However,most of this research has concentrated on analyzing the way in which horizontal network relationships lead to effective village governance.It has thus to some extent neglected the basic reality of the overlapping interconnections between the ＂top-down＂ administrative system and the informal structure of village governance.In fact,an analysis that proceeds from the features of the government＇s own organizational network,the social structure of the village itself and the position of its elites in order to focus on modes of interaction within the village under the intermixture of（formal） system design and（informal） social relations,shows that differences in the composition of the government＇s promotional networks resulting from the traits of keyofficials affect the speed of policy dissemination as well as the government＇s mode of interaction with the village elites.Moreover,differences in these modes of interaction further influence the subsequent operation of self-organization based on social traditions（＂filial piety＂ or ＂morality＂）.At the same time,structural elements,including the economic and social relations of the village itself,determine whether self-organization will improve the quality of governance in the long term.This finding can serve as a reflection on and critique of the theories of ＂strong government＂ and ＂tradition＂ current in academia.

Magnetoelectroelastic fields in rotating multiferroic composite cylindrical structures

An analytical solution is obtained for a rotating multiferroic composite hollow cylinder made of radially polarized piezoelectric and piezomagnetic materials. Both the number of layers and the stacking sequence of the composite cylinder can be arbitrary. General mechanical, electric and magnetic boundary conditions can be applied at both the inner and outer cylindrical surfaces. The state space method is employed so that only a 2×2 matrix is involved in the whole solving procedure. In the nu-merical experiments, the distributions of elastic, electric as well as magnetic fields in an internally pressurized rotating BaTiO3/CoFe2O4 composite hollow cylinder subjected to different boundary conditions are presented graphically. The results clearly show that the stress fields in a multiferroic composite cylinder are controllable.

Long-term follow-up of haploidentical transplantation in relapsed/refractory severe aplastic anemia:a multicenter prospective study

In recent decades,haploidentical stem cell transplantation(haplo-SCT)to treat severe aplastic anemia(SAA)has achieved remarkable progress.However,long-term results are still lacking.We conducted a multicenter prospective study involving SAA patients who underwent haplo-SCT as salvage therapy.Long-term outcomes were assessed,mainly focusing on survival and quality of life(QoL).Longitudinal QoL was prospectively evaluated during pretransplantation and at 3 and 5 years posttransplantation using the SF-36 scale in adults and the PedsQL 4.0 scale in children.A total of 287 SAA patients were enrolled,and the median follow-up was 4.56 years(range,3.01–9.05 years)among surviving patients.During the long-term follow-up,268 of 275 evaluable patients(97.5%)obtained sustained full donor chimerism,and 93.4%had complete hematopoietic recovery.The estimated overall survival and failure-free survival for the whole cohort at 9 years were 85.4%±2.1%and 84.0%±2.2%,respectively.Age(≥18 years)and a poorer performance status(ECOG>1)were identified as risk factors for survival outcomes.For Qo L recovery after haplo-SCT,we found that QoL progressively improved from pretransplantation to the 3-year and 5-year time points with statistical significance.The occurrence of chronic graft versus host disease was a risk factor predicting poorer QoL scores in both the child and adult cohorts.At the last followup,74.0%of children and 72.9%of adults returned to normal school or work.These inspiring long-term outcomes suggest that salvage transplantation with haploidentical donors can be routine practice for SAA patients without human leukocyte antigen(HLA)-matched donors.