高效的学习习惯

<正>The key~2 to becoming an effective student is learning how to study smarter,not just harder.Most of them succeed~3 by effective study habits.The following are some good habits of effective study.成为一名学习效率高的学生关键是学会如何更聪明地学,而不只会刻苦地学。他们中的大多数通过高效的学习习惯获得成功。以下是几个高效学习的好习惯。     

Practical studies on rockfall simulation by DDA

In this paper,simulations of real rockfall by discontinuous deformation analysis (DDA) are conducted.In the simulations,the energy losses of rockfall are categorized into three types,i.e.the loss by friction,the loss by collision,and the loss by vegetation.Modeling of the energy loss using absolute parameters is conducted by the DDA method.Moreover,in order to verify the applicability and validity of the proposed DDA,field tests on rockfall and corresponding simulations of rockfall tests by DDA are performe...     

第25届世界天然气大会(WGC2012)会议论文和报告目录(终) 第三部分 工作委员会论文

<正>5工作委员会5(WOC5)5.1子文件夹1371.Energy Saving by High Efficiency CHP—a New Natural Gas Value Eni's Experience Eni公司通过高效热电联产技术进行节能以提高天然气价值的经验(共6页)2.Analysis of Structure and Dynamic of Natural Gas Industrial Consumption天然气行业消费结构和动态分析(共6页)3.Substitution of Electricity by Natural Gas in Textile Stamping Machines:a New Technology天然气取代电力作为纺织机动力的新技术(共13页)     

In Situ Tests--Predicted vs. Observed Settlements： A Comparative Case Study

This paper aims to deal with the comparison of the estimated settlements derived by in situ tests with the observed settlements in site, in order to evaluate the accuracy of settlement prediction by in situ tests, in comparison not only with site observation by topographic means, but also with the values of settlements derived by numerical analysis by means of PLAXIS 2D and 3 D. The site where are carried out the tests and periodically are observed the settlements since the beginning of construction process, is located in the Oil Product Terminal, at the industrial park of Porto Romano, Durres, Albania. The main purpose of this project was the ground improvement by using preloading method in order to prevent liquefaction process and settlements. The data used to conduct this study are taken by the site investigation done after inserting into the soil vertical drains made of columns of free--draining gravel （gravel pile drains） until 14 m depth and center-to-center spacing of 2 m, and wick drains （premanufactured） until 25 m depth and center-to-center spacing of 1.8 m. The observed settlements are periodically measured by topographic equipments. This paper will present the conclusions derived by settlement analyzes from in situ tests and site observations.     

Damage-free coring technique for rock mass under high in-situ stresses

Rock sampling with traditional coring method would cause initial damage to rock samples induced by in-situ stress relief during coring.To solve this problem,a damage-free coring method is proposed in this paper.The proposed coring scheme is numerically modeled first,and then it is verified by comparative laboratory tests using rock samples both obtained by conventional coring method and the proposed damage-free coring method.The result indicates that the in-situ stresses in sampling area could be reduced by 30%-50% through drilling a certain number of destressing holes around the whole sampling area.The spacing between adjacent destressing holes is about 10 cm.The average uniaxial compressive strength(UCS) of rock samples obtained by the damage-free coring method in Jinping II hydropower station with overburden depth of 1 900 m is higher than that of samples obtained by the conventional coring method with the same depth by 5%-15% and an average of 8%.In addition,the effectiveness of damage-free coring method can also be verified by acoustic emission(AE) monitoring.The AE events monitored during uniaxial compression test of damage-free coring samples is fewer than that of conventional coring samples at the primarily loading phase.     

新目标英语八年级(上) Unit 9知识要点归纳

<正>【重点词组或短语】1.prepare for为……做准备2.have the flu患感冒3.help my mom with housework帮妈妈做家务4.another time下次,其他时间5.last fall去年秋天6.hang out常去某处;泡在某处7.by now到现在8.visit/see sb.拜访某人9.study for the chemistry test为化学考试而学习10.be available有空11.look after照看;照顾12.accept an invitation接受邀请     

to 1997. The results indicated that the

ain by 0.2% (0.01 t ha-1). If contribution of CG germplasm, which has greater production potential, is increased by 1%, maize yield will gain by 0.025 t ha-1. A policy should be implicated by the government in this direction to encourage breeders to focus more on th     

自主学习教学模式在建筑设计基础课程中的应用

建筑设计基础的教学改革势在必行.通过对自主学习含义及特征的分析,说明了将自主学习和建筑设计基础课程结合的必要性,在教学过程中通过引导布置、自主学习和评价反馈3个阶段的组织,从而培养学生自主学习的能力.     

Energy release process of surrounding rocks of deep tunnels with two excavation methods

Numerical analysis of the total energy release of surrounding rocks excavated by drill-and-blast(D&B) method and tunnel boring machine(TBM) method is presented in the paper.The stability of deep tunnels during excavation in terms of energy release is also discussed.The simulation results reveal that energy release during blasting excavation is a dynamic process.An intense dynamic effect is captured at large excavation footage.The magnitude of energy release during full-face excavation with D&B method is higher than that with TBM method under the same conditions.The energy release rate(ERR) and speed(ERS) also have similar trends.Therefore,the rockbursts in tunnels excavated by D&B method are frequently encountered and more intensive than those by TBM method.Since the space after tunnel face is occupied by the backup system of TBM,prevention and control of rockbursts are more difficult.Thus,rockbursts in tunnels excavated by TBM method with the same intensity are more harmful than those in tunnels by D&B method.Reducing tunneling rate of TBM seems to be a good means to decrease ERR and risk of rockburst.The rockbursts observed during excavation of headrace tunnels at Jinping II hydropower station in West China confirm the analytical results obtained in this paper.     

A Review and Evaluation of China''''s Policy for Development of Small Towns

The development of small towns is themost conspicuous phenomenon in the rapidurbanization in China in recent years.From1978 to 1985,China's urban population in-creased by 200 millions,among which thetown population increased by 62.4 per cent.