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These results show that liver macrophages release a factor of unknown nature launching the mechanism of TAT induction independently of cortisol, a classic TAT inducer.
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The probabilistic aspects of rocket accidents during their launching and the motion in the troposphere are discussed.
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We analyze the prospects of launching an experimental spacecraft with a solar sail.
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The launching of such a ship into an Earth orbit or beyond by a large nuclear explosion in an underground cavity is sketched out in the second section of the paper, and finally we consider a hypothetical Mars mission based on these concepts.
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Determination of the width of a corridor of re-entry into the atmosphere for the problem of launching a spacecraft into a circum
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| In the first part of the paper,the author presented the method and process of launching and landing of ships by means of a floating dock.Further,in illustra- ting the principles of designing an U-shaped floating dock which is used for docking of 10,000 tons-class merchant ships as an example,the author solved and analyzed the problems regarding to longitudinal strength of floating dock and the ship docked therein with the use of theorem of beams on elastic foundation. | 本文首先介绍了利用浮坞进行船舶下水和上墩方法的操作过程。然后以万吨商船为例阐述了浮坞设计的概要,并运用弹性基础梁的理论对浮坞强度计算进行了分析和探讨。 | This paper presents the design and process of construction of a continuous prestressed concrete box girder railway bridge erected by incremental launched method with a steel truss as a launching nose. This is the first one of railway bridge in China to have employed this method of construction. Calculations of stresses are shown and process of construction has been well illustrated. From experience obtained through design and construction we observed: 1)This launching method of construction has certain... This paper presents the design and process of construction of a continuous prestressed concrete box girder railway bridge erected by incremental launched method with a steel truss as a launching nose. This is the first one of railway bridge in China to have employed this method of construction. Calculations of stresses are shown and process of construction has been well illustrated. From experience obtained through design and construction we observed: 1)This launching method of construction has certain advantages, as it is easier to construct in the field, less equipments are required and no scaffolding is needed. It proves to be a more favourable construction method for prestressed girder of spans 30～60meters long. 2) Using this method to construct continuous prestressed concrete girders, special attentions must be paid to keep the bottom face of the girder sections in plane, and to maintain the desired elevations of the supporting points. In design it is necessary to have a certain factor of safety for the whole launching process. 3) To meet the requirements to push forward, the sliding base and sliding plate should be further improved. 4) By selecting a suitable site behind the abutment as casting yard,the casting and launching of girder sections can go on simultaneously, and as a result the advantages of the launching method would be more evident. 5) In order to utilize the equipments more efficiently it is better to install the jacking devices at different places, rather than to install them on the abutment only. | 本文介绍了我国铁路上第一座采用顶推法施工的预应力混凝土箱形连续梁的设计和施工,顶推时使用了拆装式导梁。通过该桥的实践,作者认为:1)顶推法具有便于现场制造,设备简单,节省支架等独特的优点。对于跨度30～60米范围內的预应力混凝土梁来说,是较适宜的施工方法;2)采用顶推法施工应对梁底的平整度及控制支点标高特别加以注意,设计时应对整个顶推过程的检算保留适当的安全储备;3)作为使梁体在顶推过程中滑移的滑道、滑块应加以研究改进,使适应顶推的要求;4)在台后选择制梁场地,采取边灌筑梁体,边顶推的方案将更能充分发挥顶推法施工的优越性;5)对顶推设备以采用分散顶推较集中顶推为佳。 | By summing up the work experience of Mr. Liu Chun-pu, the national outstan-ding teacher in charge of a class, this study gives a tentative analysis on the psycho-logical processes of the formation of moral character among primary middle schoolpugils under the influences of class collective and makes a preliminary explorationabout the approach to the subject concerned. Our findings show that the formation process of the pupil's moral character is aprocess in which the struggle and solution of the contradiction... By summing up the work experience of Mr. Liu Chun-pu, the national outstan-ding teacher in charge of a class, this study gives a tentative analysis on the psycho-logical processes of the formation of moral character among primary middle schoolpugils under the influences of class collective and makes a preliminary explorationabout the approach to the subject concerned. Our findings show that the formation process of the pupil's moral character is aprocess in which the struggle and solution of the contradiction between new moraldemands and old behaviour habits are realized. In this process, the pupil's attitudehad to be modified in order that he could receive instructions conscientiously, a classcollective should be established with learning tasks as its centre of orientation, richand varied educational activities should be launched, and special attention paid to thetransformation of those pupils who lagged behind. All these are key links. Teachersmust take educational measures effectively in accordance with the peculiarities oftheir pupils in different developmental stages in ordel to slove different problemscharacteristic of a given stage. In doing sc, the teachers may be able to impel theformation and development of the pupils' communist morality. | 这篇初步的研究报告有很值得重视的意义。所介绍的不仅是很可宝贵的教育工作经验,并同样是可以很富有成效的一种发展心理学和教育心理学研究方法,只是所作的心理学考察还可以更深入一些。这样的研究可以由教育工作者自己做,也可以由心理学工作者和教育工作者一起做。也可以在后者的协助之下进行。 | | | | << 更多相关文摘 |
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