关于That的用法

<正>That一词在英语中出现地很频繁,也很灵活,同时,还能与其他词构成各种短语,在句子中但当不同成分,用法特别,对一些学习者,尤其是初学者,带来不少麻烦。本文主要就That的基本用法和构成短语做一归纳。1作指示代词,意为"那、那个",可指人或物。This is better than that.(指物)Who is that in the room?(指人)     

That用法种种

That在英语中的用法很多,它可用作代词、形容词,副词,还可引导名词性从句、定语从句和状语从句,that还用在强调句和其他固定搭配中。     

Discussion of the Constitutive Relation on Cyclic Stress-Strain of Engineering Materials

Based on the experimental results and analysis of the cyclic deformation, there is an obvious yield stage on the cyclic stress-strain curve at the stage of small plastic deformation (in room or low temperatures). This phenomenon is similar to that of monotonic tensile curve case. But for the former the deformation amount at which the yield begins is much smaller than that for the latter. The cyclic stress-strain constitutive relation needs to be further studied according to the actual cyclic stress-strain curve. The conventional constitutive equation σ=Aεn is based on the results only corresponding to the cyclic strengthening stage. It is not appropriate for the stage of the small plastic deformation and the stage of yield.     

连词that的用法小结

在学习英语中,读者常见到带有that的句子。That是个常用词,用法很多,可用作指示代词、关系代词、连词、形容词和副词等等。现就that作为连词的用法,初步归纳为以下几点,供英语学习者参考。1 引导名词性从句1.1 引导一个相当于名词的从句,尤其是一个动词的主语或宾语,连系动词后面的谓语主格或it作形式主语或宾语所要求的名词性从句。     

顺序象似性和英语时间状语从句的定位分析

近年来,功能和认知语言学研究表明状语从句的定位是由句法分析、语篇语用学和语义学相竞作用来确定的。象似性原则对时间状语从句的定位产生影响。象似性原则预示主句和从句的线性排序反映它们所描述事件的顺序排序。虽然时间从句一般位于主句之后,但从句顺序与象似性之间有明显的相关性:表示先前事件的时间状语从句位于主句之前的现象往往比位于主句之后常见。此外,还有其他因素会影响时间状语从句的定位,如长度、复杂性和语用引入等。     

Oxygen and carbon isotope records of calcareous nannofossils for the past 1 Ma in the southern South China Sea

Oxygen and carbon isotopic analyses have been carried out on calcareous nannofossils from ODP Site 1143 in the southern South China Sea. The results demonstrate that the δ18O values of calcareous nannofossils for the past 1 Ma vary systematically with those of planktonic and benthic foraminifera from the same site. But the average δ18O value of nannofossils is 1.869‰ higher than that of planktonic foraminifera, and is 3.855‰ lower than that of benthic foarminifera. There are systematic differences between the δ13C values of nannofossils, planktonic foarminifera and benthic foraminifera. The average δ13C of nannofossils is 0.756‰ higher than that of benthic foraminifera, and is 0.460‰ lower than that of planktonic foraminifera. The δ13C values of nannofossils exhibit a significant positive shift beginning near isotope stage 14 and lasting until stage 8. This study also finds that there is a close ralationship between the δ13C of nannofossils and the percentage of Florisphaera profunda. This implies that the δ13C of nannofossils can be used as an indicator of sea water surface paleoproductivity.     

Non-coupled charge explosion and geo-mechanical dynamics

The non-coupled charge explosion and geo-mechanical dynamics problem in real air condition is studied in this paper. It analyzes and calculates the problem by using the real air state equations. Through researching on the non-coupled charge rock bench blasting with big clearance of air, its result indicates that the borehole wall reflection overpressure is far higher than strength of rock, but much lower than detonation front pressure of the charge. So non-coupled charge explosion blasting engineering is very successful. Furthermore, it introduces the method of shaft forming by blasting once and the new tube room technology. And the non-coupled charge explosion is used successfully in the method of shaft forming by blasting once. As it drills and blasts in the top and removes the broken rock from the bottom tunnel, it increases the construction efficiency significantly. This paper has important reference on the improvement of the large-span underground engineering construction.     

Investigation into the energy consumption of a data center with a thermosyphon heat exchanger

A data center test model was used to analyze the energy dissipation characteristics and energy consumption of a data center.The results indicate that adequate heat dissipation from a data center cannot be achieved only from heat dissipation through the building envelope during Beijing winter conditions.This is because heat dissipation through the building envelope covers about 19.5% of the total data center heat load.The average energy consumption for an air conditioner is 4 to 5 kW over a 24-h period.The temperature difference between the indoor and outdoor air for the data center with a thermosyphon heat exchanger is less than 20°C.The energy consumption of the thermosyphon heat exchanger is only 41% of that of an air conditioner.The annual energy consumption can be reduced by 35.4% with a thermosyphon system.In addition,the effect of the outdoor temperature on the en-ergy consumption of an air conditioner is greater than the indoor room temperature.The energy consumption of an air conditioner system increases by 5%to 6%for every 1°C rise in the outdoor temperature.     

A Biomechanical Analysis of the Techniques of Elite Chinese Male Long Jumpers

The purpose of this paper was to make sport-biomechanical analysis of the techniques of chinese elite male long jumpers. By using the data obtained from the computer processing of the film motion analyzer, authors found that the horizontal velocity of the chinese athletes is higher than that of the foreign athletes. But the vertical velocity, on the contrary, of the chinese athletes is lower than that of the foreign athletes. This is perhaps the reason why the results of the chinese long jumpers have not been satisfactory.     

Effect of rare earth elements on the microstructure and property for magnesium alloy AM60B

The effects of rare earth elements on the microstructure and properties of magnesium alloy AM60B alloy were studied. Different proportions of rare earth elements were added to AM60B and the tensile tests were carried out under different temperatures. The experimental results show that at room temperature the tensile strength of AM60B can be improved with the addition of rare earth elements. The ductility of which at room or elevated temperature (120℃) can also be improved, and the ductility is to some extent in proportion with the amount of rare earth elements. The ductility at 120℃ is better than that at room temperature. The microstructure graphs demonstrate that appropriate amount of rare earth elements (0.1%-0.2%, mass fraction) can fine AM60B's grain and improve its ductility.     

英语中的转移否定结构

英语中的转移否定结构是一种非常复杂的语言现象。本文对英语复合句中的宾语从句、原因状语从句及主语从句中的否定式会转移到主句的谓语动词之前的情况 ,分别作了阐述和举例说明。英语中的转移否定结构可算是特指否定的一种变体形式 ,可使句子的否定语气显得较为委婉 ,有广泛的使用范围     

英语中的转移否定结构

英语中的转移否定结构是一种非常复杂的语言现象。本文夺英语复合句中的宾语从句、原因状语从句及主语从句中的否定式会转移到主句的谓语动词之前的情况，分别作了阐述和举例说明。英语中的转移速写结构可算是特指否定的一种变体形式，可使句子的否定语气显得较为委婉，有广泛的使用范围。     

Correlation between aggregation structure and tailing mineral crystallinity

Direct reduction is an emerging technology for the utilization of refractory iron ore. With this technology, iron oxides in the ore can be reduced to recoverable elemental iron. The structure of granular aggregates in direct reduction products was investigated by X-ray diffraction (XRD). The results show that iron is mainly generated as a shell in the outer edge of the aggregates. The thermal conductivity of the iron shell is higher than that of other minerals. Thus, minerals close to the iron shell cool faster than those in the inner shells and do not crystallize well. These minerals mainly become stage 2 tailings. Hence the XRD intensity of stage 2 tailings is lower than that of stage 1 tailings. When iron is mainly generated in the interior of the aggregates, the crystallinity of stage 2 tailings will be higher than that of stage 1 tailings. This indicates that the crystallinity of tailings can be used as a marker for the aggregate structure.     

Formation of Black Patina on Bronze Mirrors Caused by Multiphenol

Hot solution of hydroquinone is oxidized by air forming quinone and quinhydrone, both of which have weak oxidizeability, enabling to oxidize metals on the surface of bronze mirror samples forming black and brilliant patina. SEM and electron micro probe analysis show that Cu content is lower than that of the original alloy due to Cu loss; Sn content is higher than the original alloy in patina. This indicates that humic acid is not the substance resulting in making black patina on the bronze mirror surface, but the black patina which produced from hydroquinone solution absence of Si, Al and Mg.     

Structural stability and Raman scatterin g of CoPt and NiPt hollow nanospheres under high pressure

This paper reports that the high pressure in situ angle dispersive x-ray diffraction and Raman scattering studies on CoPt and NiPt hollow nanospheres are performed by means of a diamond anvil cell for generating external pressure at room temperature.The crystal structures of both the CoPt and NiP hollow nanospheres keep stable up to about 41 GPa.Moreover,it shows that the hollow nanospheres possess higher bulk moduli than their bulk counterparts by using the frst-principles density functional theory.     

定语从句中关系词的选用技巧

定语从句中关系词的选用是定语从句在实际应用中的一个重要部分,在学习这部分语法时,要了解关系词在从句中的位置,在从句中充当的句子成份,以及它们与主句之间的关系。选用定语从句的关系词,应在充分掌握英语基础知识和交际功能的同时,认真分析定语从句的整个句型结构,从而找到切题点。     

Reliability Comparison Between Parallel and Cold-standby Two-unit System Under Poisson Shock

This paper investigates the comparison problem of the reliability index between a parallel and a cold-standby system,both of which are consisting of two identical units.On the contrary to the general intuitive result,we proved that,under the condition that the system is shocked by a Poisson stream,the life time of the parallel system is longer than that of the cold-standby one in the sense of probability.     

谈谈“more than”的用法

英语中“more than”的用法比较复杂,使用范围也很广,我们在阅读英文科技资料,尤其是文学作品时,经常会遇到这种句型。例如:Its output value Was more than 4 times that under the thirdFive—Year Plan.Oil does not blend with water any more than iron floats on it。He is more than a friend to me.He is more than pleased with the result.     

英语句子中否定的转移

英语中否定词not的位置,与其否定的内容并非总是一致的。本文从句子的主句与从句,谓语与主语、宾语或状语之间not的位置及其所表达的确切含义方面,对否定的转移现象进行一些探讨。     

Semi-Supervised Additive Logistic Regression： A Gradient Descent Solution

This paper describes a semi-supervised regularized method for additive logistic regression. The graph regularization term of the combined functions is added to the original cost functional used in AdaBoost. This term constrains the learned function to be smooth on a graph. Then the gradient solution is computed with the advantage that the regularization parameter can be adaptively selected. Finally, the func- tion step-size of each iteration can be computed using Newton-Raphson iteration. Experiments on bench- mark data sets show that the algorithm gives better results than existing methods.