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前人的研究成果     
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  predecessor ’ s research data
     On the above analysis, together with predecessor’s research data, a conclusion is made that this set of limestone is a product of deep-water tubidity current deposit, reflecting the lack of oxigen and reducing environment of deep-water basin deposition.
     在此基础上结合前人的研究成果对该区的古环境作了初步的探讨,认为这套灰岩为深水浊流沉积,反映为缺氧、还原环境的深水盆地沉积。
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  forefathers research results
     On the basis of studying numerously of field geological and drilling profiles of the Bottom Permian System in the Northwest of Sichuan,combine forefathers research results,propose this area have both characteristic of carbonate platform and carbonate ramp at Chihsia Age in the Early Permian Period,called the Honmogeneous Oblique Platform environment.
     通过对川西北地区众多下二叠统野外剖面和钻井剖面的分析,结合前人的研究成果,提出该地区在早二叠世栖霞期兼具碳酸盐台地和碳酸盐缓坡沉积特征,称为均斜台地环境。
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  previous research results
     This paper has studied the vehicle monitoring system and its relevant technologies on the basis of previous research results, and its main content is summed up as follows:(1) This paper compares the positioning means and transmission means that can be adopted in a vehicle monitoring system, and then purposes to select GIS/GPS/GPRS technology to integrate the vehicle monitoring system.
     本文在总结前人的研究成果的基础上,对车辆监控系统及其相关技术进行了研究,主要内容归纳为以下几点:(1) 对车辆监控系统可采用的定位技术、无线数据通信技术进行了分析比较,提出采用GIS/GPS/GPRS技术集成车辆监控系统。
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     The article firstly presents the rent-seeking theory and the institutional economics theory that are representative in the field of corruption study,and summarizes previous research results.
     本文首先介绍了在腐败研究领域具有代表性的寻租理论和制度经济学理论,总结了前人的研究成果
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     In this background, by adsorbing and integrating the previous research results, the thesis mainly discussed the rhetoric of the news discourse.
     正是在这样的背景下,本文借鉴、整合前人的研究成果,主要对新闻话语进行修辞学研究。
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     The mineral assemblages are very complex in the Lower Cambrian black shale in Zhangjiajie of Hunan and Zunyi of Guizhou. X- ray diffraction analysis combined with previous research results shows that the contents of sulfide minerals, clay minerals and organic matter are relatively high.
     贵州遵义和湖南张家界黑色岩系中的矿物组合非常复杂,用X射线衍射仪分析并结合前人的研究成果,显示其中的硫化物矿物、粘土矿物和有机质含量较高;
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     This thesis aims to review the previous research results and provides insight in interpreting such phenomenon in communication from different aspects.
     本文目的在于回顾前人的研究成果,从不同角度深入了解反语,并且在交际环境中解读这种特殊的语言现象。
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  previous research findings
     Based on the basic theory of reinforced concrete structurel cracks,the paper probes into this problem,obtains the theoretical formula of crack similarity,recommends the approximate formula and verifies the previous research findings and the actual crack investigation results.
     本文根据钢筋混凝土结构裂缝基本理论 ,对该问题进行了初步探讨 ,得出了裂缝相似率理论公式 ,推荐了近似计算式 ,并用前人的研究成果和实际裂缝调查成果进行了验证。
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  previous research results
Our previous research results have shown that the Ti-O films with appropriate characteristics possess great potentials for biomaterials application.
      
In comparison with previous research results, it is found that such a strain rate field can be described by both the continuous deformation and block motions in the continent.
      
The results were in agreement with previous research results.
      
The measured genetic variability was compared with previous research results for Asian macaques.
      
Decline in attitudes toward medically underserved patients was similar to previous research results.
      
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  previous research findings
Results support previous research findings which show that nicotine significantly improves short-term memory.
      
Conclusions: The present findings in rats support previous research findings in other species indicating a major role of dopamine in the discriminative-stimulus effects of methamphetamine.
      
The results are discussed with respect to the high proportion of individuals in the action-oriented stages and previous research findings in the smoking literature.
      
Additionally, and as a result of previous research findings, the study looks at the relationship between political ideology, gender, age, profession and moral judgment.
      
The results of the present research enhance the criteria elaborated in previous research findings to improve species choices for reforestation and silvicultural management in Costa Rica and in other regions with similar ecological features.
      
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With regard to technical or economical reasons, one of the commonly adopted spillway designs is a connection of spillway with surface re- gime to the downstream river bed by setting a step (straight drop) at the spillway toe without a stilling basin. So far as the flow patterns of connection are concerned, for a given structure, in accordance with the tailwater depth flow patterns of different hydraulic behaviors may appear behind the step. Up to the present, several formulas have been proposed to deter- mine...

With regard to technical or economical reasons, one of the commonly adopted spillway designs is a connection of spillway with surface re- gime to the downstream river bed by setting a step (straight drop) at the spillway toe without a stilling basin. So far as the flow patterns of connection are concerned, for a given structure, in accordance with the tailwater depth flow patterns of different hydraulic behaviors may appear behind the step. Up to the present, several formulas have been proposed to deter- mine the critical state of some flow patterns. However, as the matter stands, the theoretical formulas are either inconvenient in computation or without sufficient accuracy and not used any longer, as for empiri- cal formulas, it may be seen that they almost always have their own limitations. Thus in practical applications the designers are confronted with trouble and hesitation in choosing adequate formulas to work up a correct and reasonable design. With the aim of finding several better formulas, in this paper exi- sting investigations and formulas were reviewed, further analysis and comparisons were made and finally four empirical formulas(〈31〉~〈34〉) respectively for determining the first, second and third critical state and the minimum drop height required for surface regime were obtain- ed synthetically. In these formulas the consistant parts of existing investigations are preserved and a few parts of discrepancy are rejected. The formulas are comparatively simple in form, convenient for appli- cation and with parameters having relatively wide and available extent. It is believed that the formulas obtained in this paper are adequa- te for hydraulic designs of spillways with surface regime to the down- stream river bed by adopting a step at spillway toe with an upward angle of exit lip less than 10°. Finally, an example showing in detail the calculation procedures of the author's formulas is presented.

在水工泄水建筑物中,连续式面流鼻坎是目前采用较多的一种消能和水流衔接型式。关于面流鼻坎及其衔接流态的水力设计计算问题,前人的研究实践已经取得一定的成果和经验。但是一些理论的或半经验半理论的公式,由于在推导过程中作了这样那样的假定,计算较繁而且结果不够准确,现今已很少采用。经验公式比较简便,但又多受各自根据资料和条件的限制有其局限性。所以在具体应用时,往往感到不易掌握而无所适从。本文收集了一些前人的研究成果,对其计算公式和资料进行分析比较,最后综合出四个经验公式。这些公式既吸取了现有多数公式和资料中比较一致和接近的地方,又拚弃了少数公式的较为离散之处,式中各项参数具有较大的适用范围,公式的形式简单,计算方便,配合作图能清晰地反映鼻坎衔接流态的变化特征,可供在设计常见的小挑角(鼻坎挑角小于10°左右)连续式鼻坎时,选择鼻坎的布置和计算面流、淹没面流和回复底流三种临界流态以及估算最小鼻坎高度时参考应用。文末列举了利用本文公式进行水力计算的算例。

Hollow projectile is virtually a thin-walled tube, also known as tube projectile. It is characterized by its light weight, high muzzle velocity and desired aerodynamic behaviour. Hence it provides the advantages of lower impulse, straighter trajectory, smaller dispersion and excellent penetrating power.

空心弹丸基本上是一个中空薄壁圆管(因而又称管式弹丸),它的重量轻、初速高、气动性能好,从而使得膛口冲量小、弹道低伸、散布小,并且具有优越的侵彻效果。本文在前人研究成果的基础上,结合我们的试验研究情况,比较详细地叙述了这一新弹种的低阻性能、散布精度和侵彻性能;从理论上分析对比了空心弹丸和实心弹丸的陀螺稳定性;给出了空心弹丸的阻力特性近似估算方法;最后,就这一新弹种在弹药上应用的可能性问题提出了一些看法和建议。

The L-P-CF process developed by the authors consists of 1)leaching refractory copper ore or middling by H_2SO_4,2)chnging Cu~(++)into colloidal copper sulphide precipitate and 3)carrier-flotation by using a high-grade Cu concentrate for adsorbing and carrying the fine copperish particles.Experiments on several kinds of Cu ores have been made and quite satisfactory results have been obtained in our laboratory. For example,an ore sample from Dongchuan Copper Mine,was floated to yield a high-grade concentrate and...

The L-P-CF process developed by the authors consists of 1)leaching refractory copper ore or middling by H_2SO_4,2)chnging Cu~(++)into colloidal copper sulphide precipitate and 3)carrier-flotation by using a high-grade Cu concentrate for adsorbing and carrying the fine copperish particles.Experiments on several kinds of Cu ores have been made and quite satisfactory results have been obtained in our laboratory. For example,an ore sample from Dongchuan Copper Mine,was floated to yield a high-grade concentrate and a middling.Then,the middling was treated with the L-P-CF process,using the concentrate as carrier.A final concentrate grade of 22.5% Cu and a recovery of 81.5% were achieved,which exceeded those obtained by conventional flotation process by 4-5% and 7-8% respectively.Another sample assay- ing 2% of Cu from Dayie Copper Company,yielded a concentrate with an assay of 24.9% Cu and recovery of 81.2% through the L-P-CF process,while the conventional flotation process only gave a concentrate grade of 15% Cu and a recovery of 35%. It is believed that the L-P-CF process may have some advantages over the other chemical processes for Cu ores,e.g.:1)it does not involve any solid-liquid separation in the process;2)no extractants,ion-exchangers or sponge iron are needed,3)flotation is performed in neutral or weak acid pulp;4)precious metals,such as Au,Ag,can be recovered together with Cu;5)flotation process can be greatly improved by using Cu concentrate as carrier,which is available to any plant and does not need regene- ration and reuse;6)using CaS as a precipitant of Cu~(++)and CaCO_3 for neutralizing free acid may provide favourable conditions for treatment of waste water.

本文提出的浸出—沉淀—载体浮选法(简称LPCF法)用以处理硅铝型、钙镁型和铁锰型的难选铜矿石和中矿取得了较好结果。精矿品位高于20%,铜回收率比常规浮选法高6~40%。在我国,用选冶工艺处理难选铜矿石的研究,已进行了多年,由于若干重大技术经济问题尚未解决,用于生产的为数不多。我们的研究目的是在前人研究成果的基础上,寻求一种易于工业化的难选铜矿石的化学选矿方法。浸出—沉淀—载体浮选法,对三种不同类型的难选铜矿石及其浮选中矿进行小型试验,获得了较好的结果。

 
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