2009-7-27 P,1
Unit 5
Data Processing
Chapter Two
&Part4 Extensive Reading@ Part 1 Notes to Text
@Part5 Notes to Passage& Part 2 Word Study
@Part3 Practice on Text @Part6 Practice on Passage
2009-7-27 P,2
@ Part 1 Notes to Text
1) data processing,遥感数据处理是指通过各种技术手段对遥感探测所获得数据进行的各种处理。
2) While the object or phenomenon of interest may not be
directly measured,there exists some other variable that can be
detected and measured by the observation,which may be
related to the object of interest through the use of a data-
derived computer model,
虽然就凭观察难以直接测量和判断人们所感兴趣的物体或现象,但是却能测出和判断出其中的某种变化。通过计算机数据源模型可以使这种变化与令人感兴趣的物体关联起来。
注释,连接词 while引导让步状语从句,意为“虽然、尽管”;引导词
there放在句首,引起主、谓语倒装; which引导非限制性定语从句,
指代的是 some other variable。
Data Processing
2009-7-27 P,3
3) Spatial resolution refers to the size of a pixel that is
recorded in a raster image – typically pixels may correspond
to square areas ranging in side length from 1 to 1000 metres,
空间分辩率是指摄录在栅格图像中像素的大小 —典型的像素相当于边长为一至一千米的任一正方形面积。
注释,名中 that关系代词,引导定语从句修饰先行词 a pixel;破折号后面的内容属于 a pixel的同位语,用来对 a pixel做进一步解释;
而 ranging则是现在分词短语做定语,修饰 square areas。
4) For example,in conventional photographs,distances are
accurate in the centre of the image,with the distortion of
measurements increasing the farther you get from the centre.
例如,在传统的照片里,远景通常要非常精确地置于图像中心,因为如果离中心越远,失真度就会越大。
注释,句中 with + n + v-ing构成独立结构,作状语,表原因。
2009-7-27 P,4
5) One of the best system for achieving data series is a
computer-generated machine — readable ultrafiche,usually in
typefonts such as OCR-B,or as digitized half-tone images,获得数据序列的最佳系统之一是一种用计算机生产的设备,即:可读超微片。这种设备通常用于各种字体,如 OCR-B字符集,或用于数字化的半色调图像。
注释,名词短语 readable ultrafiche是 computer-generated
machine的同位语;介词短语 in typefonts是状语 ; 此外,OCR-B字体是用于光学字符识别系统得专用字体,它包含了欧洲字符。 OCR-B
字符集包含大写和小写字符、数字以及多个特殊字符。该字体是基于
ANSI X3.49-1982(R2002)和 ISO 1073/1规范创建的。
End
2009-7-27 P,5 End
1,phenomenon n,现象 11.georeferencing n,坐标变换
2,spectral adj,光谱的 12.benchmark n,基准点
3,emission n,散发,发射 13.monochromatic adj,单色的,单频的
4,thermodynamic adj,热力学的 14.haze n,薄雾,烟雾
5,spatial adj,空间的 15.pixel n,像素
6,radiometric adj,辐射仪的 16.aerial n,天线
7,infrared spectrum 红外光谱 17.photogrammetry n,摄影测量学
8,extrapolate v,推断 18.photomosaics n,图象拼接
9,distortion n,扭曲,失真(度) 19.ultrafiche n,超缩形单片
10.platen n,压(印)盘 20.minimal adj,最少的,最小的
& Part 2 Word Study
2009-7-27 P,6
Task 1,Listening training
Dictation of some key words
Directions,You will hear some key words twice,most of which are taken from
the Word Study,Then finish the Crossword Puzzle,(See you book p,)
2,Dictation of some key expressions
Directions,You will hear some key expressions twice,most of which are
taken from this text,Then you are asked to complete the missing words.
@Part3 Practice on Text
1) _________of the inverse_________
2) a data-derived_________________
3) temporal_________________
4) create _______________maps
5) _________________benchmark
6) ______________________machine
principle problem
computer model
resolutions
sensor-based
an established
a computer-generated
2009-7-27 P,7
Read and Reply
Directions:Students are required to read aloud the whole text after
the teacher,Then give short answers to the following questions:
a) What does the quality of remote sensing data consist of?
b) Why may images need to be radiometrically corrected?
Task 2,Read,Write and Translate
It consists of spatial,spectral,radiometric and temporal
resolutions.
Because radiometric correction gives a scale to the pixel
values.
A computer-generated machine — readable ultrafiche.
c) What is one of the best systems for achieving data series?
2009-7-27 P,8
( )1) Interpretation is a very important process of making sense
of the data.
( )2) The frequency of the spctral emission is irrelevant to the
temperature in that region,
( )3) Spatial resolution refers to the size of a pixel that is
recorded in a raster image.
( )4) Ultrafiches survive well in standard libraries,with lifetimes
of several centuries,
( )5) Image Analysis is the recently developed automated
computer-aided application which is in increasing use.
Read and Judge
End
T
F
T
T
T
2009-7-27 P,9
Directions:Read the following short passage,Complete it by filling in the missing words.
A,from B,in C,distinguish D,cover E,relevant
F,refers G,manage H,frequency I,said J,to
The MODIS satellites are the highest resolving at 31 bands,
Radiometric resolution 1)_____ to the number of different intensities
of radiation the sensor is able to 2) _______,Typically,this ranges 3)
______ 8 to 14 bits,corresponding 4) _____ 256 levels of the gray
scale and up to 16,384 intensities or "shades" of colour,in each band,
The temporal resolution is simply the 5) _____ of flyovers by the
satellite or plane,and is only 6) _____ in time-series studies or those
requiring an averaged or mosaic image as 7) _____ deforesting
monitoring,Cloud 8) _____ over a given area or object makes it
necessary to repeat the collection of 9) _____ location,Finally,some
people also refer to the "economic resolution",that is,the cost-
effective way to 10) _____ the collection of data.
Read and Complete
End
F
C
A J
H
E
B
D
I
G
2009-7-27 P,10
1)这次英语测试由三个主要部分组成:听力、阅读及翻译。( consist of)
2)尽管我承认他的优点,我还看到他的缺点。 ( while)
3)关于大家都感到十分吃惊的那件事,他有好多话要说。 (in relation to)
4)这个班学生的年龄在十八岁到二十岁之间。 (range)
5)显而易见,懒惰往往导致失败。 (result in)
Read and Translate
Directions:Put the following sentences into English,using the words or phrases given.
End
The English test consists of three major parts:listening,reading
and translation,
While I admit his good points,I can see his weak points,
He has a lot to say in relation to the affair that everyone is quite
surprised at,
Age of the students in the class ranges from 18 to 20,
It is obvious that laziness tends to result in failure,
2009-7-27 P,11
Data Warehousing
In OLTP - online transaction processing systems,relational database
designs use the discipline of data modeling and generally follow the
Codd rules of data normalization(正常化 ) in order to ensure absolute data
integrity,Less complex information is broken down into its most simple
structures (a table) where all of the individual atomic level elements
relate to each other and satisfy the normalization rules,Codd defines 5
increasingly stringent(严格的 )rules of normalization and typically OLTP
systems achieve a 3rd level normalization,Fully normalized OLTP
database designs often result in having information from a business
transaction stored in dozens to hundreds of tables,Relational database
managers are efficient at managing the relationships between tables
and result in very fast insert/ update performance because only a little
bit of data is affected in each relational transaction.
OLTP databases are efficient because they are typically only dealing
with the information around a single transaction,In reporting and
analysis,thousands to billions of transactions may need to be
reassembled(重新集结 )imposing a huge workload(工作量 )on the relational
&Part4 Extensive Reading
2009-7-27 P,12
database,Given enough time the software can usually return the
requested results,but because of the negative performance impact
on the machine and all of its hosted applications,data warehousing
professionals recommend that reporting databases be physically
separated from the OLTP database.
In addition,data warehousing suggests that data be restructured
and reformatted to facilitate(使便利 )query and analysis by novice(新手 )
users,OLTP databases are designed to provide good performance
by rigidly(硬性地 )defined applications built by programmers fluent in
the constraints(约束 )and conventions of the technology,Add in
frequent enhancements,and too many a database is just a collec-
tion of cryptic(隐蔽的 )names,seemingly unrelated and obscure stru-
ctures that store data using incomprehensible coding schemes,All
factors that while improving performance,complicate use by
untrained people,Lastly,the data warehouse needs to support high
volumes of data gathered over extended periods of time and are
subject to complex queries and need to accommodate(容纳 )formats
2009-7-27 P,13
and definitions inherited from independently designed package
and legacy(遗产 ) systems.
Designing the data warehouse,Data Architecture synergy(协同作用 )is the realm of Data Warehouse Architects,The goal of a data
warehouse is to bring data together from a variety of existing
databases to support management and reporting needs,The
generally accepted principle is that data should be stored at its
most elemental level because this provides for the most useful
and flexible basis for use in reporting and information analysis.
However,because of different focus on specific requirements,
there can be alternative methods for design and implementing
data warehouses,There are two leading approaches to
organizing the data in a data warehouse,the dimensional
approach advocated by Ralph Kimball and the normalized
approach advocated(主张 )by Bill Inmon,Whilst the dimension
approach is very useful in data mart(市场 )design,it can result in a
rats nest of long term data integration and abstraction
complications when used in a data warehouse.
End
2009-7-27 P,14
@Part5 Notes to Passage
1)Given enough time the software can usually return the
requested results,but because of the negative performance
impact on the machine and all of its hosted applications,data
warehousing professionals recommend that reporting
databases be physically separated from the OLTP database.如果给予足够的时间,软件通常能够返回所请求的结果。但由于给该计算机以及由该计算机所托管的所有应用软件带来的负面操作的影响,因此数据库专业人士建议将报表数据库和联机数据库完全分隔开。
注释,此句是典型的并列复合句;第一分句中的过去分词短语 Given
enough time是状语,相当于条件状语从句 If it is given enough
time;注意第二分句中的谓语动词由于使用了 recommend,表示
“建议”,所以宾语从句的谓语动词采用了虚拟语气 be physically
separated from……,省略了 should。
2009-7-27 P,15
2)OLTP databases are designed to provide good performance
by rigidly defined applications built by programmers fluent
in the constraints and conventions of the technology,联机事务处理数据库的设计,是为了通过由熟悉技术约定与常规的程序员所开发的那些硬性规定的应用软件来提供良好的操作。
注释,该句虽是简单句,但结构却较为复杂。其中,不定式短语 to
provide good performance… 是目的状语;介词短语 by rigidly
defined applications 则是方式状语,修饰 provide;过去分词短语 built by programmers 是定语,修饰 applications; fluent
in the constraints and conventions of the technology则是形容词短语作定语,修饰 programmers。
2009-7-27 P,16 End
3)There are two leading approaches to organizing the data in a
data warehouse,the dimensional approach advocated by
Ralph Kimball and the normalized approach advocated by
Bill Inmon,组织数据仓库中的数据最主要的方式有两种:一是由
Ralph Kimball倡导的维量方式;一是由 Bill Inmon倡导的标准化方式。
注释,Kimball博士自 1982年以来一直是数据仓库行业最主要的开拓者,他的观点是,,数据仓库仅仅是构成它的数据集市的联合”。
他认为,“可以通过一系列维数相同的数据集市递增地构建数据仓库”。每个数据集市将联合多个数据源来满足特定的业务需求。
通过使用 "一致的 "维,能够共同看到不同数据集市中的信息,这表示它们拥有公共定义的元素; Inmon被称为数据库之父,最早的数据仓库概念提出者。他认为,应该围绕主题来组织数据仓库中的数据,例如客户、供应商、产品等等。每个主题区域仅仅包含该主题相关的信息。数据仓库应该一次增加一个主题,并且当需要容易地访问多个主题时,创建以数据仓库为来源的数据集市。
2009-7-27 P,17
1.Listening Challenge
Spot Dictation
Directions,The following passage will be heard 3 times,During the second time,you
are required to put the missing words or phrases in the numbered blanks according to
what you hear,The third time is for you to check your answers,Now the passage
begins.
Operating systems for 1) __________ sensor network nodes are
typically less complex than general-purpose operating systems 2)
_____ because of the special requirements of sensor network 3)
____________ and because of the resource constraints in sensor
network hardware platforms,For example,sensor network
applications are usually not 4) __________ in the 5) ________way as
applications for PCs,Because of this,the operating system does
not need to include support for 6) _____ interfaces,7) ___________,
the resource constraints in 8) _____ of memory and memory
mapping 9) _______________ support make mechanisms such as
virtual memory either 10) ___________ or impossible to implement.
@Part6 Practice on Passage
End
wireless
both
applications
interactive same
user Furthermore
terms
hardware
unnecessary
2009-7-27 P,18
End of this Unit