一种旋转压力容器的新型柔性支撑结构

将非径向柔性传动应用到旋转压力容器中,它与对称的径向刚性传动旋转压力容器相比,具备一定的优势,整体刚性支撑结构与压力容器,一般采用刚性连接,在容器运行时,由于容器本身受压力、温度、介质等特殊工况的影响,会使容器本身产生一定的变形,容器变形波及整体刚性支撑结构,很难克服,造成刚性支撑结构失效。新型柔性支撑结构,既能克服,又能解决设备的膨胀变形、强度、支撑、振动、传动、控制等诸多约束因素,既能满足容器的正常运行,同时又能满足设备旋转运动的正常需求。     

非径向管板焊接接头的超声检测

对AP1000压水堆核电站安全壳贯穿件的非径向管板焊接接头结构特点进行了介绍,并分析其超声检测工艺的重点和难点.通过建立统一的缺陷定位坐标系并结合被检构件的几何特点进行综合分析,推导得出了h值(缺陷回波最高点距套管外壁的距离)的计算方法.为超声检测对这类焊接接头缺陷的准确识别和定位提供了行之有效的方法,为解决这类焊接接...     

氨合成塔非径向接管有限元分析与强度评定

运用有限元分析方法对大型氨合成塔塔底球形封头非径向接管区进行了应力分析,得到了非径向接管部位详细的应力分布。按照分析设计法进行了强度评定,针对原设计中的不足,提出了在接管外面加套管以增加接管壁厚的补强方案,并进行了该方案的应力计算与强度评定。结果表明:补强后接管内侧的最大应力下降了23.2%,完全满足强度评定要求。     

China's energy efficiency improvement on account of the development of wind and solar power: Applying a dynamic non-radial directional distance function

China is developing wind energy and solar power as the main channels to deal with climate warming and has put forward the goal of achieving peak carbon emissions by 2030 and carbon neutralization by 2060. Previous studies evaluating the nation energy efficiency rarely consider the impact of wind and solar power. Thus, different from past literature, this research introduces Carbon Emission Reduction Capacity (CERC) by wind and solar power as a new output variable and applies a dynamic non-radial directional distance function to evaluate China's energy efficiency from 2011 to 2019. The empirical results show that northwest provinces with their high proportion of wind and solar power present better energy performance, while some eastern and central provinces with high efficiency as seen in previous study have greater room for improvement of wind and solar power. It is suggested that the China government formulate more flexible policies to support the sustainable development of wind and solar power, so as to reduce the consumption of fossil energy and cope with climate warming.     

Regional energy efficiency,carbon emission performance and technology gaps in China: A meta-frontier non-radial directional distance function analysis

At present, China is the largest primary energy consumer and carbon emitter in the world. Meantime, China is a large transitional economy with significant regional gaps. Against such backgrounds, the calculated results of energy and carbon performance indicators may be biased, without considering heterogeneity across regions. To this end, after incorporating region-heterogeneity, this paper provides detailed information, regarding energy efficiency, carbon emission performance and the potential of carbon emission reductions from regional perspectives, which may be important and useful for policy makers. Our main findings are as follows. Firstly, there is significant group-heterogeneity across regions in China, in terms of energy efficiency and carbon emission performance. Secondly, there are no considerable differences between total-factor and single-factor performance indices, since there is limited substitutability between energy inputs and other production inputs. Finally, significant carbon emission reductions can be made by “catching up” for regions with low energy efficiency and carbon emission performance. Looking ahead, the Chinese government should adopt measures to promote improvements in terms of energy efficiency and carbon emission performance in the short term.     

椭球形管板非径向孔加工的方法

简述了椭球形管板非径向孔加工的几种较实用方法。     

椭圆形封头非径向接管内伸长度的近似计算

压力容器制造中许多接管是装在椭圆形封头上的，有的是开在限制开孔的区域，为了计算该区域接管长度，提出了可以通过简易计算来确定该区域接管的长度。     

不扩孔径向水平井用生产管的可行性分析探讨

径向水平井钻井技术在我国现已处在开发应用阶段,通过对近几年来国内各大油田应用径向水平井技术的情况调研和相关资料研究表明,此技术非常适合于开发低渗透油层和薄油层,对提高油田采收率非常有效.但是在应用中存在扩孔困难、油层容易污染等问题,而且施工成本高.为此提出了用无需扩孔的小直径生产管来代替传统的φ32 mm生产管的新思路,这种技术具有创新性.文中应用有关流体力学知识对其可行性进行了分析,提出了实现此项新技术的几点看法.     

考虑环境处置性的DEA综合效率模型

由于传统的径向或非径向DEA（Data Envelopment Analysis）模型在追求投入或产出最大化改进时角度不同,并且模型中的污染物往往采用强可处置假设,考虑因此造成的评价偏离实际生产过程、区分力差等问题,提出环境弱处置性下的基于灰关联的DEA径向与非径向综合效率模型。基于环境DEA技术提出了一个径向与非径向特征结合的综合效率模型研究框架;基于投入变量序列的灰关联构造了接近度指标,从而获得框架中连接与测量径向与非径向模型的特征参数,将其置于框架中得到最终评价结果。以2010年中国29个省份综合效率评价为算例,结果验证了模型的有效性。