φ140mm无缝管机组的节能技术改造

介绍φ140mm无缝管机组生产节能工艺技术改造情况.分析原热穿冷拔工艺的能耗及废水排放,在原基础上改造为热轧工艺后,原煤消耗由原来的240.3kg/t降为201.6kg/t;电耗由原来的11 9.2Kwh/t降为92.4Kwh/t;节减了酸洗工序,废水排放由原来的203.2m3/d降为0m3/d,直接减少了石灰用量.每年可节约标煤3096t,节约电力21 5万Kwh,减少废水排放60960m3.节约硫酸、石灰消耗费用302.6万元.     

Extraterrestrial artificial photosynthetic materials for in-situ resource utilization

Aerospace milestones in human history, including returning to the moon and manned Martian missions, have been implemented in recent years. Space exploration has become one of the global common goals, and to ensure the survival and development of human beings in the extraterrestrial extreme environment has been becoming the basic ability and technology of manned space exploration. For the purpose of fulfilling the goal of extraterrestrial survival, researchers in Nanjing University and the China Academy of Space Technology proposed extraterrestrial artificial photosynthesis (EAP) technology. By simulating the natural photosynthesis of green plants on the Earth, EAP converts CO₂/H₂O into fuel and O₂ in an in-situ, accelerated and controllable manner by using waste CO₂ in the confined space of spacecraft, or abundant CO₂ resources in extraterrestrial celestial environments, e.g. Mars. Thus, the material loading of manned spacecraft can be greatly reduced to support affordable and sustainable deep space exploration. In this paper, EAP technology is compared with existing methods of converting CO₂/H₂O into fuel and O₂ in the aerospace field, especially the Sabatier method and Bosch reduction method. The research progress of possible EAP materials for in-situ utilization of extraterrestrial resources are also discussed in depth. Finally, this review lists the challenges that the EAP process may encounter, which need to be focused on for future implementation and application. We expect to deepen the understanding of artificial photosynthetic materials and technologies, and aim to strongly support the development of manned spaceflight.     

高原训练对提高青年女排运动员体能测试水平的分析

在全国青年女排高原集训期间,对集训前后两次助跑摸高、五次连续摸高、6 m×16次网下穿越移动、米字移动和800 m跑进行了对比分析.研究发现,高原训练对于助跑摸高和五次连续摸高的提高具有重要的意义;也可以促进6 m×16次网下穿越移动和米字移动的提高;800跑的成绩没有发现明显的提高;高原训练期间运动员的伤病情况明显增多.     

正六边孔的衍射场

为了研究正六边形小孔的衍射场,采用波前相因子判断法并考虑到孔径的影响对正六边形小孔的衍射场进行研究,得出正六边形小孔衍射场所含基元成份及衍射场的波前函数、像面上的振幅分布函数和光强分布函数,然后利用数值模拟的方法得出正六边形小孔在像面上的衍射图样;结果表明,在验证衍射理论的同时拓展了衍射的概念,能为深入理解光的衍射提供参考.     

松嫩平原菹草资源及其渔业利用

菹草是松嫩平原湖泊、水库等渔业水域较重要的资源植物。本文根据1984—1992年试验研究的部分成果,初步报道了该平原区渔业水域菹草资源现状和菹草型渔业水体生态系统特点,探讨了菹草的渔业经济价值,并提出菹草资源的渔业合理开发利用途径。     

Synergetic governing controller design for the hydraulic turbine governing system with complex conduit system

The hydraulic turbine governing system plays an indispensable role in maintaining the stability of electrical power system. In this paper, synergetic control theory is introduced to enhance the regulating ability of the hydraulic turbine governing system. For the purpose of describing the characteristics of objective system and deducing the synergetic control rule, a nonlinear mathematic model of a hydraulic turbine governing system with long tail race and two surge tanks is established. Furthermore, the nonlinear characteristic of the hydraulic turbine is described by six variable partial derivatives. For further investigation, the hydraulic turbine governing system is conducted to running under load condition when its coaxial generator connects to an infinite bus. Simulation experiments have been made under both load disturbance and three-phase short circuit fault conditions to compare the dynamic performances of proposed synergetic governing controller and classic PID controller. The results indicate that the proposed synergetic governing controller is an effective alternative in normal condition and a superior one in emergency. Moreover, the robustness of synergetic governing controller has also been discussed at the end of this paper.     

谈谈恐龙是热血动物的证据

恐龙是兴起于三叠纪晚期，全盛于侏罗纪，灭亡于白垩纪末期的一类古代巨大爬行动物。自从恐龙化石被真正发现，它们是冷血动物的观点便开始长期占据着人们的思想。但随着近几十年来科学家对恐龙化石特征、数量及其分布研究的不断深入，各方面的证据都从不同角度否定了这一传统观点。大量事实说明恐龙实际上的是一类热血动物。虽然现在对这一观点仍有部分争论，但这一观点的提出却对古生物学的发展产生了重大影响，是古生物学的一场革命。本文通过对这些证据的收集、整理、综合，具体阐述恐龙是热血动物论证过程，并就这此证据谈谈笔者对恐龙灭亡原因的一些设想。     

论《神雕侠侣》小说与电视、动画的改编

《神雕侠侣》从小说到电视剧再到动画剧“,情”之表现渐趋明朗,人物性格渐趋单一,文化内涵渐趋消解。从传播学角度入手,可以看到引起这些变化的根本原因在于传播方式的不同：传播主体、媒介与受众的显著差异,导致其美学特征产生差异,进而使作品发生以上诸种变化。虽然这些表象上的变化在改编中是必然且可以理解的,但文学作品的影视、动画改编仍然必须在尊重原著的基础上充分展现各自的美学特征,才能创作出优秀的艺术作品。     

水利水电工程灰色局势招标决策

水利水电工程投资决策均要求通过招标投标来实现 ,如何搞好招标决策不仅关系到业主或项目法人的利益 ,而且关系到水利水电工程的成败。利用灰色理论对招标决策进行较为系统的分析和研究 ,为招标投标这一新机制的应用和研究 ,提供一些有益的建议     

薄荷试管苗的离体保存

目的:建立一种能延长薄荷种质资源离体保存时间的方法。方法:以薄荷试管苗为材料,接种到添加不同配比的甘露醇和蔗糖的MS(Murashige and skoog,1962)培养基中;在温度为(25±1)℃、光照强度2000 Lx,光照时间12 h/d、相对湿度60%左右的环境下培养;12个月后选成活率较高的试管苗转接到生根培养基进行恢复生长后驯化盆栽,以正常继代苗作对照,分别测量其株高、茎粗、叶片数及叶片SPAD值。结果:试管苗在添加蔗糖浓度30~90 g/L和甘露醇浓度0~15 g/L的MS培养基短期内都有部分存活,最长能保存12个月,存活率最高达60%。保存12个月的试管苗在MS培养基上均能恢复正常生长,驯化盆栽后的成活率为100%。结论:添加浓度为70 g/L蔗糖和5~10 g/L甘露醇的MS培养基适合薄荷试管苗的离体保存。