标点符号的超常用法

标点符号都是用于句中和句末的,将标点符号用于句前或以标点符号代字组句的现象较为罕见,笔者称这种用法为标点符号的超常用法。现归纳为下列数种形式并简析之,以为引玉之砖。一是借助标点符号的独特形貌,将其置于句前,使句子更加引人注目,从而增强文句的表达能力。比如: !!!——张海迪的事迹令人惊叹。???——张海迪的事迹教人沉思。(曹宪文《奋斗者的“力学”》,载“中国青年》,1983年第4期,第25页)

loud,aloud和loudly的用法浅析

在英语学习中,特别是在做选择题时,大多学生分辨不清loud,aloud和loudly这三个词。但如果掌握其含义和常用法,就容易辨别了。一、aloud和loudly都是副词,但aloud含义是“出声地”声音不一定大,重点是出声,能让人听见。常与read,think,cry等词连用。如:

do的口语用法

do虽然是个人人都熟悉的词,但对于它的用法并非所有的人都能运用自如。其实,在英语会话中,do含义之多,用途之广实非其他词所能及。现仅就其在口语中的常用法略谈一二。 1.和别人第一次见面或遇到不大熟悉的人时,最适当的问侯语,当首推How do you do?了,它可以用在任何场合。除此之外,我们还可以用 How are you doing?来问侯。

等标层析法筛选黄曲霉毒素

为解决基层检验黄曲霉毒素的困难,我们试用一种定性和半定量的简便筛选方法——等标层析法,现介绍如下。实验部分一、试剂和材料1.试剂:与常用法试剂相同。2.微型层析柱:200×5.5mm 玻管,按下法制备成层析柱。将玻管一端塞少许棉花。

漫谈should的多种意义

在英语语言的运用中,should 是一个极其常用的助动词和情态动词。然而正是这一司空见惯造成很多人忽略了这一平常词的不平常用法。事实上,这个词的用法既简单而又复杂,并具有广泛的词汇意义。因而对该词了解多少可直接影响到对该词的使用和理解。

使用不定式应注意的若干问题

不定式是非谓语动词的四种形式之一,在句中可作主语、宾语、表语、定语、状语、主语补足语,宾语补足语、甚至还可和某些助动词、情态动词一起构成复合谓语。它的一些常用法在许多文章中常被提及,在此不再多论。本文拟谈谈它的一些不常见、且易错用、错理解的用法。

《与妻书》中两个“一”字的含义

'一'字的通常用法是以数词的面目出现在句子里,而黄花岗七十二烈士之一林觉民写的《与妻书》(高中语文第二册)中有两个地方的'一'字用法非比寻常,感情十分丰富,含义极其深刻,它们与文中其他文句一样,映入眼字字有情,读出口声声下泪,但课本未作注释,今试译如下:

“我”的趣谈

“我”是怎么回事?有人会说,我就是我,你就是你,这不是最清楚的问题吗?这样的反驳中隐含着对“我”的一种理解,即“我”就是用以指代每个个人的代词。我当然是“我”,你也可以是“我”,他还可以是“我”。“我”并不确指某个人,人人都可为“我”。但为什么人们可以是“我”呢?人们怎么才能是“我”呢?在日常中,我们一开口,便常会说“我……”,这时我就是“我”了,我就“我”起来了。可“说”是怎么回事?如何能“说”起来?在佛法看来,“说”是诸因缘和合的结果,是顺应着诸因缘条件的把持和执取。在“说”的执持中。

利用事件的概率解排列组合题

排列组合题型灵活多变,解题技巧仕很强,一般都采用分类相加,分步相乘的原理.往往由于解法繁复而发生遗漏或重复,本文试用事件的概率解一类排列组合题,它较之常用法思路清晰,步骤简捷. 在占典概率型中,事件A的概率定义为 P(A)=A包含的样本点数/样本点总数即 A包含的样本点数=P(A)·样本点总数(＊)下面举例说明应用该公式解排列组合题. 例1 由数字0、1、2、3、4、5组成不重复数字的六位数,其中个位数子小于十位数字的有几个? 解:令事件A={由题设中的个位数字小于十位数字的六位数}。

微也足道——关注标点符号在言语表达中的运用

一个个小小的标点符号在文章中的作用是不容小觑的,往往蕴含着特殊的意义。这需要教师拥有一双＂慧眼＂,去发现这小小符号所带给读者的独特风景,带领学生一起去聆听那＂小不点＂碰撞出来的美妙乐音,一起去挖掘那＂小不点＂所蕴藏的珍贵宝藏,并且将这些＂小不点＂变成课堂上学生学习的亮点,提高阅读教学的实效。

A method for gravity anomaly separation based on preferential continuation and its application

Based on the preferential continuation method proposed by Pawlowski （1995）, we propose a method and procedure for gravity anomaly separation with the preferential upward continuation operator in the case that the various sources are uncorrelated with one another and the continuation height is enough large. We also present a method for estimating optimum upward-continuation height, based on analyzing the characteristics of the preferential upward continuation operators of a synthesized gravity anomaly varying with different continuation heights. The method is tested on the raw Bouguer gravity data over an iron deposit. The result shows that the method separates the data into regional anomaly and residual anomaly efficiently and clearly.

Optimization of the catch bench design using a genetic algorithm

Rockfalls are one of the hazards that may be associated with open pit mining. The majority of rockfalls occur due to the existing conditions of slopes, such as back break, fractures and joints. Constructing a berm on the catch bench is a popular method for the mitigation of rockfall hazards in open pit mining.The width of the catch bench and the height of the berm play a major role in the open pit bench design.However, there is no systematic method currently available to optimize the size of these parameters. This study proposes a novel methodology which calculates the optimum catch bench width by integrating the rockfall simulation model and genetic algorithm into a Simulation-Optimization Model. The proposed methodology is useful when used to determine the minimum catch bench width, or the maximum overall slope angle, insuring that a sufficient factor of safety of the slope is included while maximizing the overall profitability of the open pit mine.

Feasibility Study on Common Methods for Wave Force Estimation of Deep Water Combined Breakwaters

China's newly enacted Breakwater Design Specifications(JTS154-2011) explicitly state that breakwaters with water depths greater than 20 m are categorized as deep-water breakwaters, and emphasize that design principles, methods and construction requirements are different from those of common shallow water breakwaters. However, the specifications do not make any mention of how to choose wave force calculation methods of deep-water breakwaters. To study the feasibility of different formulae for wave force estimation of deep water combined breakwaters, the wave force calculated by the Sainflou's, Goda's, modified Goda's and specifications' methods are compared for various water depths and wave heights in this paper. The calculated results are also compared with experimental data. The total horizontal forcing and the pattern of pressure distributions are presented. Comparisons show that the wave pressure distributions by the four methods are similar, but the total horizontal forces are different. The results obtained by the Goda's method and the specified formulae are much closer to the experimental data. As for the wave force estimation for the deepwater mixed embankment foundation bed parapet, the Goda's formula is applied in the case with a water depth of less than 42 m. The Specifications method is suitable for standing waves. In the wave force estimates of breastworks, Sainflou's and the modified Gaoda's formulae are no longer applicable for the foundation bed of mixed embankment.

Design method of pile-slab structure roadbed of ballastless track on soil subgrade

Pile-slab structure roadbed is a new form of ballastless track for high speed railway. Due to lack of corresponding design code, based on the analysis of its structure characteristics and application requirements, it is proposed to carry out load effect combination according to ultimate limit state and serviceability limit state, and the most unfavorable combination of each state is chosen to carry through design calculation for pile-slab structure. Space model of pile-slab structure can be simplified as a plane flame model, by using the orthogonal test method, and the design parameter of pile-slab structure is optimized. Moreover, based on the engineering background of Suining-Chongqing high-speed railway, the dynamic deformation characteristics of pile-slab structure roadbed are further researched by carrying on the indoor dynamic model test. The test results show that the settlement after construction of subgrade satisfies the requirement of settlement control to build ballastless track on soil subgrade for high-speed railway. Slab structure plays the role of arch shell as load is transmitted from slab to pile, and the vertical dynamic stress of subgrade soil is approximately of ＂K＂ form distribution with the depth. The distribution of pile stress is closely related to soil characteristics, which has an upset triangle shape where the large dynamic stress is at the top. Pile compared with soil shares most dynamic stress. Pile structure expands the depth of the dynamic response of subgrade has limited effect on dynamic response. These results can provide subgrade. and improves the stress of subgrade soil, and the speed of train scientific basis for pile-slab structure roadbed used on soil

Application of the Generalized Differential Quadrature Method in Solving Burgers' Equations

The aim of this paper is to obtain numerical solutions of the one-dimensional,two-dimensional and coupled Burgers' equations through the generalized differential quadrature method(GDQM).The polynomial-based differential quadrature(PDQ) method is employed and the obtained system of ordinary differential equations is solved via the total variation diminishing Runge-Kutta(TVD-RK) method.The numerical solutions are satisfactorily coincident with the exact solutions.The method can compete against the methods applied in the literature.

False anomaly recognition with horizontal differential field lines method in high-density electrical technique and its application in Xinlei Quarry,Jiuquan

As an important geophysical tool,high density electrical technique infers the underground geological structures by processing and inverting the apparent resistivity data.Currently,the false anomalies have been frequently occurred in the graph of apparent resistivity pseudo-section or inverted geoelectrical section obtained from high-density electrical technique,and are difficult to remove.In this study,the authors explain the mechanism of the false anomalies and put forward the horizontal differential field method to identify the false anomalies.Based on the analysis of modeling results,this method is applied in the surveying data in Xinlei Quarry of Jiuquan,and the results confirm the effectiveness of the horizontal differential field method.

The Application of Well Logging to CBM Exploration

Well logging technology in coalbed methane （CBM） exploration may develop in two directions： one is the novel well logging methods; the other is the new interpretation methods for the conventional logging data, on which the authors of this paper concentrated mainly. The paper introduced several methods in calculating with well logs such important parameters as porosity, permeability and gas content of CBM reservoir and evaluated their effectiveness. A new method of well logging data interpretation was put forward for coalbed recognition, i.e., the combination of the principal component analysis and the wavelet transform. The authors find that the second principal component （PCA2） contains much more information of coalbed in the coal-bearing series and the reconstruction signal from the detailed wavelet coefficients at level 4 （PCA24） and 5 （PCA25） highlights the signature ofcoalbeds. In terms of the characteristics of CBM reservoir in China, the authors summarized the key points in the application of well logging technique to CBM exploration, and gave a guideline for further related research work.

Improvement of Euler＇s Method Using Particle Swarm Optimization

Many problems in applied mathematics lead to ordinary differential equation. In this paper, a considerable refinement and improvement of the Euler＇s method obtained using PSO （particle swarm optimization） was presented. PSO is a technique based on the cooperation between particles. The exchange of information between these particles allows to resolve difficult problems. This approach is carefully handled and tested with an illustrated example.