statistics的用法总结
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篇1:statistics的用法总结
1、The degree provides a thorough grounding in both mathematics and statistics.
该学位课程将为数学和统计学打下扎实的基础。
2、A close look at the statistics reveals a troubling picture.
仔细看过统计数据后,会发现情况令人担忧。
3、Their governments have no reason to “massage” the statistics.
他们的政府没有理由“窜改”这些数据。
correlational statistics的中文翻译及用法
phr. 相关,关联;相互关系
英语解释
· a statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other
相似短语
· correlational statistics phr. 相关,关联;相互关系
· correlational analysis phr. 因素相关性分析
· correlational grammar 关联语法
· correlational hierarchy 相关的等级体系
· administrative statistics 行政统计资料
· employment statistics 就业统计,就业统计
· decentralized statistics 分散统计
· field statistics 现场统计
· genetic statistics 遗传统计
· inventory statistics 库存统计,库存统计表
相似单词
· correlational adj. 相关的
· Statistics n. 统计,统计数字
· statistics n. 1.一项统计数据 2.统计资料,统计数字 3.统计学
· health statistics 【医】 卫生统计
篇2:statistics的用法总结
statistics可以用作名词
statistics作“统计资料,统计数字”解用作主语时,谓语动词常用复数形式。作“统计学”解用作主语时,谓语动词用单数形式。
statistics用作名词的用法例句
He is a professor of statistics.他教授统计学。
There is a compulsory course in statistics.有一门统计学的必修课。
Get me a printout of the statistics.给我一份打印出的统计资料。
篇3:Statistics
Statistics
There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of government units (states and statistics come from the same Latin root status) and a gentlemanly gambling father who relied on mathematics to increase his skill at playing the odds in games of chance. The influence of the mother on the offspring, statistics, is represented by counting, measuring, describing, tabulating, ordering, and the taking of censuses-all of which led to modern descriptive statistics. From the influence of the father came modern inferential statistics, which is based squarely on theories of probability.Describing collections involves tabulating, depicting and describing collections of data. These data may be quantitative such as measures of height, intelligence or grade level------variables that are characterized by an underlying continuum---or the data may represent qualitative variables, such as sex, college major or personality type. Large masses of data must generally undergo a process of summarization or reduction before they are comprehensible. Descriptive statistics is a tool for describing or summarizing or reducing to comprehensible form the properties of an otherwise unwieldy mass of data.
Inferential statistics is a formalized body of methods for solving another class of problems that present great of problems characteristically involves attempts to make predictions using a sample of observations. For example, a school superintendent wishes to determine the proportion of children in a large school system who come to school without breakfast, have been vaccinated for flu, or whatever. Having a little knowledge of statistics, the superintendent would know that it is unnecessary and inefficient to question each child: the proportion for the sample of as few as 100 children. Thus , the purpose of inferential statistics is to predict or estimate characteristics of a population from a knowledge of the characteristics of only a sample of the population.
篇4:Statistics
Statistics
There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of government units (states and statistics come from the same Latin root status) and a gentlemanly gambling father who relied on mathematics to increase his skill at playing the odds in games of chance. The influence of the mother on the offspring, statistics, is represented by counting, measuring, describing, tabulating, ordering, and the taking of censuses-all of which led to modern deive statistics. From the influence of the father came modern inferential statistics, which is based squarely on theories of probability.
Describing collections involves tabulating, depicting and describing collections of data. These data may be quantitative such as measures of height, intelligence or grade level------variables that are characterized by an underlying continuum---or the data may represent qualitative variables, such as sex, college major or personality type. Large masses of data must generally undergo a process of summarization or reduction before they are comprehensible. Deive statistics is a tool for describing or summarizing or reducing to comprehensible form the properties of an otherwise unwieldy mass of data.
Inferential statistics is a formalized body of methods for solving another class of problems that present great of problems characteristically involves attempts to make predictions using a sample of observations. For example, a school superintendent wishes to determine the proportion of children in a large school system who come to school without breakfast, have been vaccinated for flu, or whatever. Having a little knowledge of statistics, the superintendent would know that it is unnecessary and inefficient to question each child: the proportion for the sample of as few as 100 children. Thus , the purpose of inferential statistics is to predict or estimate characteristic
篇5:统计学(Statistics)
when i was doing internship at the renowned cosmetics co. ltd, i was deeply impressed by the motto from , the founder of the company—“believe in miracle and miracle will indeed happen.” at one point during my undergraduate education i was very frustrated because i found that, due to the lack of effective methodology of numerical analysis, the teaching and the research of economics in china lags far behind the international standard as represented by the developed countries of the west. as a result, even though i am one of the top students from the university of finance and economics, i find it difficult for me to really enter the true realm of economics study. instead of dealing a heavy blow on me, this discovery motivated me to maximize my efforts in the study of mathematics and to apply for an advanced degree program in statistics at your well-respected university after having completed my undergraduate program. it is my conviction that, as long as i have sufficient confidence myself and make sufficient efforts, i am bound to accomplish some form of achievements in the field of statistics and make due contributions to the development of quantitative research in economics in the chinese academia. miracle will indeed happen.
i specialized in accounting at the accounting college of university of finance and economics. an undergraduate education in the specialty of accounting covers knowledge in a wide range of fields—economics, management science, mathematics, statistics, and even sociology. while providing me with a solid academic foundation, this education has enabled me to ferret out the areas that can really capture my interest. i have cherished a strong interest in mathematics since the primary school and developed my talents all the way through my middle and high school. but it is only through my undergraduate study that i have come to realize the vital importance of mathematical approaches to the study of economics. this very realization has further reinforced my determination to choose the career of an applied statistician in the future. toward such an objective, i have devoted special efforts to the study of mathematics and statistics. apart from intensive work in such compulsory courses as calculus, linear algebra, theory of probability, statistics, and mathematical statistics, i have also attended a series of important optional courses including operational research, game theory of economics, sampling investigation and made full use of my spare time to learn the knowledge of statistics as much as possible.my undergraduate education should be described as very rewarding and fruitful. for the past three consecutive years, i have maintained top ranking in my class and for two consecutive years i was given the “outstanding student” award, winning level-a scholarships. i have demonstrated special aptitudes in mathematics and in english. my natural talents in mathematics and my dedicated efforts to mathematics coursework have led my gpa in all the mathematics courses to reach 3.9, far exceeding the level of average students. in terms of english language, i have also been well above average. in the first semester in i won the first prize at the “freshmen cup” english listen comprehension contest and in i won the first prize in the english contest for college students in china, the third prize at the oral english contest in province. even though i have assumed various responsibilities for extracurricular activities of several student organizations, i have still managed to perform well academically, a fact that should be attributed to my extra diligence, productive study methods, and effective allocation of my time and energy. from the very outset of my undergraduate career, i made up my mind to fully exploit all the available resources of my university to achieve comprehensive self-development and what i have achieved adequately testifies to the rewarding undergraduate life i have been living.
as a science that tries to discover inherent quantitative relationships among different data and make rational statistical inferences by applying relevant theories and methodologies, statistics has been widely applied in the modern society, its impact penetrating into almost all fields of physical and social sciences. with china’s reform toward the market economy and its accession into the wto, statistics is becoming increasingly important in china’s economic life. the fact that the subject i am interested in will enjoy a broad prospect of application in china makes me very excited and confident concerning my future study and career. in my proposed program, i will first try to consolidate my foundation in statistics and then narrow down my interests to focus on time series analysis and statistic inference.i believe that to make rational inferences is one of the major functions of statistics. in many cases, pure statistical models or time series models can make more precise inferences and predictions than theoretical models of economics. the dilemma faced by modern economics in making predictions is one of the important reasons for me to choose statistics over economics as the area of my concentration. as an important aspect of statistical study and research, i will try to master one or two advanced statistical software such as gauss and tsp. in addition, if possible, i wish to be a member of the research group of my future advisor under whose direction i can work on a full-length research project. it is equally desirable for me to do extensive internship at a specific government organization or a local enterprise so that i can apply my knowledge of statistics and test its efficacy.
apart from the sound undergraduate education that i have received, together with my special achievements in mathematics and english, my creativity, perseverance, and my good logical thinking are three major factors of my implicit confidence in my future performance, just as they have contributed to my distinguished performance in the past over most of my peers. meanwhile, i am also very proud of my past extracurricular performance, which has considerably improved my practical abilities beyond the mere coursework, like teamwork, organization and interpersonal communication. i served as student leader in the students union, editor of the university student newspaper, member of accounting study group and youth volunteer association. in , i worked part-time as beauty consultant at the renowned american cosmetics company. an important experience directly related to my specialty is the internship i did in 2003 at the statistical bureau of city during which i worked on a city-wide population sampling investigation, collecting and analyzing data and accumulating much practical statistical experience.i prioritize on university as the school for my master’s program in statistics because a careful study of your esteemed university shows me that it is a world famous university with a long academic tradition. in terms of the teaching and research of statistics, it plays a leading role not only in american but also in international academia. naturally it becomes my ideal choice. as a student of accounting i have built up a sufficient foundation in statistics and mathematics requisite for a graduate program in statistics. therefore, i sincerely wish that my application could be seriously considered.
篇6:Pairwise Velocity Statistics of Dark
Pairwise Velocity Statistics of Dark Halos
We have accurately evaluated the halo pairwise velocity dispersion and the halo mean streaming velocity in the LCDM model (the flat ω0 = 0.3 model)using a set of high-resolution N-body simulations. Based on the simulation results,we have developed a model for the pairwise velocity dispersion of halos. Our model agrees with the simulation results over all scales we studied. We have also tested the model of Sheth et al. for the mean streaming motion of halos derived from the pair-conservation equation. We found that their model reproduces the simulation data very well on large scale, but under-predicts the streaming motion on scales r < 10 h-1 Mpc. We have introduced an empirical relation to improve their model.These improved models are useful for predicting the redshift correlation functions and the redshift power spectrum of galaxies if the halo occupation number model,e.g. the cluster weighted model, is given for the galaxies.
作 者:Hai-Yan Zhang Yi-Peng Jing 作者单位:Hai-Yan Zhang(Department of Astronomy, Peking University, Beijing,100871)Yi-Peng Jing(Shanghai Astronomy Observatory, the Partner Group of MPI für Astrophysik,Nandan Road 80, Shanghai, 30)
刊 名:天体物理学报(英文版) ISTIC SCI英文刊名:CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS 年,卷(期): 4(6) 分类号:P14 关键词:cosmology: theory - dark matter halo - large-scale structure of universe篇7:Statistics考研英语作文-英语作文
Statistics考研英语作文-英语作文
There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of government units (states and statistics come from the same Latin root status) and a gentlemanly gambling father who relied on mathematics to increase his skill at playing the odds in games of chance. The influence of the mother on the offspring, statistics, is represented by counting, measuring, describing, tabulating, ordering, and the taking of censuses-all of which led to modern descriptive statistics. From the influence of the father came modern inferential statistics, which is based squarely on theories of probability.
Describing collections involves tabulating, depicting and describing collections of data. These data may be quantitative such as measures of height, intelligence or grade level------variables that are characterized by an underlying continuum---or the data may represent qualitative variables, such as sex, college major or personality type. Large masses of data must generally undergo a process of summarization or reduction before they are comprehensible. Descriptive statistics is a tool for describing or summarizing or reducing to comprehensible form the properties of an otherwise unwieldy mass of data.
Inferential statistics is a formalized body of methods for solving another class of problems that present great of problems characteristically involves attempts to make predictions using a sample of observations. For example, a school superintendent wishes to determine the proportion of children in a large school system who come to school without breakfast, have been vaccinated for flu, or whatever. Having a little knowledge of statistics, the superintendent would know that it is unnecessary and inefficient to question each child: the proportion for the sample of as few as 100 children. Thus , the purpose of inferential statistics is to predict or estimate characteristics of a population from a knowledge of the characteristics of only a sample of the population.
篇8:as用法总结
五)含as的固定词组的用法
1.as soon as作“一…就”解,引导时间状语从句。eg:
As soon as I get to Beijing,I'll write to you.我一到北京,就给你写信。
2.as/so long as作“只要”解,eg;
As/So long as you study hard,you'll make progress.只要你努力,你就会取得进步。
3.as if/though常用来引导方式状语从句,作“好像,仿佛”解。如果从句中讲的是非真实情况,则用虚拟语气。eg:
She loves the child as if/though he were her own.她爱这个孩子如同爱自己的孩子。
As if/though也可用来引导表语从句,常用在“It appears/looks/seems...+as if/though”句型结构中。eg;
It appears as if/though it is going to clear up.看起来天要晴了。
It seems as if/though he knew nothing about it.他好像对此事一无所知。
4.as to作“关于,至于”解。eg;
There is no doubt as to his honesty.他的诚实是无可置疑的。
5.as much/many as作“多达...”,“达到...之多”解。eg:
He can earn as much as 5000 dollars a month.他每月能挣5000美元。
6.so/as far as I know作“就我所知”解,在句中作插入语。eg:
As/So far as I know,he will come here next Monday.据我所知,他将于下星期一到这里来。
7.as a result,as a result of表示“由于...的结果”。eg:
She died as a direct result of the accident.她的死是那次事故的直接结果。
8,as well为“也,还”之意。eg:
Come early,and bring your brother as well.早点来,把你的弟弟也带来。
9.so as to,so...as to若跟动词原形,表示目的或结果。eg:
He studied hard so as to pass the exam.他努力学习以便通过考试。(表示目的)
as……as
AS +adj(原级)+AS
AS +adv(原级)+AS
as soon as 一……就
as soon as possible 尽可能快地
as early as possible 尽可能早的
as carefully as you can 尽可能认真地
as careful as you can 尽可能认真的
so...as 一般用于否定句,as...as 一般用于肯定句,(肯定否定都能用)
so...as不可用于肯定句.as...as与so...as均可表示“与……一样”,as...as...的用法:两个as中间可以加形容词或者副词,由它要修饰的内容决定.
它们的用法有异同之处:
肯定句用as...as,不用so...as;否定句两者均可使用.例如:
I didn't go as /so far as you.我走得不像你那么远.
They walked as far as the station.他们步行到了车站.
误:They walked so far as the station.
篇9:THAT用法总结
“that”在英文中是一个使用频率很高的单词。它有四种词性,并且句法及语法功能纷繁复杂。同学们如果不能熟练掌握其用法,很可能会形成英语学习的一种障碍,从而影响其学习兴趣和效率。现将that的用法总结归纳如下:
第一、that 用作形容词(后接复数名词时用those)。
它用来指已被提到的人或物;也可表对比,指两个中较远的那个。
what about that book you borrowed from me last month?
请注意,that 有时候在句子中具有喜欢或轻蔑等感情色彩。
that little son of his 他那个小宝贝儿子
that george!乔治那家伙!(含有轻蔑语气)
第二、that 用作代词。
1. that 用作指示代词(复数形式是those),其指代意义同形容词用法,同时它还可以用作定语从句中的先行词;还可为了避免重复,代替前述名词。
that is what he told me.
what is that (which) you have got in your hand?
the price of rice is higher than that of flour.
2. that 用作关系代词,引导限制性定语从句。先行词可人可物,用法相当于who或which。(但是在下列情况下多用that:先行词既有人又有物时;先行词有形容词最高级、序数词、不定代词、very,only等修饰时;先行词是不定代词时)
he talked about the teachers and schools that he had visited.
i think it one of the most wonderful films that the film company has ever produced.
she has little information that is useful for our research.
is there anything that i can do for you?
请注意,that 在定语从句中作宾语时通常可省略。
the books (that) i sent you will help you in your studies.
第三、that 用作连词,引导名词性从句,状语从句和强调句。
1. that名词性从句。
①引导宾语从句。及物动词后的引导词that可省略。
i didn't expect (that) he could win the championship.
the teacher pointed out that tom was not working hard enough.
② 引导主语从句。通常采用it作形式主语的句型。
that the earth goes around the sun is known to everyone.
(it is known to everyone that the earth goes around the sun.)
③引导表语从句。
the trouble is that we are short of money.
④引导同位语从句。
引导同位语从句的that和引导定语从句的that是不同的。前者只起语法作用,在从句中不作任何成分;而后者在定语从句中作主语、宾语或表语。举例说明:
the news that he resigned from office surprised us.
the idea that he holds is very common nowadays on campus.
2. that引导状语从句
①引导目的状语从句。
bring it nearer that i may see it better.
②引导结果状语从句。
what have i done that he should be so angry with me?
③引导原因状语从句。
i am afraid that i will fail in the driving test.
④引导让步状语从句。意为“虽然、尽管”。
difficult that/as the task was, they managed to accomplish it on time.
⑤引导条件状语从句。意为“假使、假设”。
supposing that you were in my position, what would you do?
on condition that you were lost in the desert, you should ask for help as soon as possible.
3. 引导强调句。
it is mrs. white that makes the decision in her family, not her meek little husband.
it is an ill wind that blows nobody good.
第四、that用作副词。
1. that用作普通副词。
i was that/so angry i could have hit him.
2. that用作关系副词。引导定语从句,可以代替when,where, why或 in which,常可省略。
i will never forget the evening (that) / when we went to the theatre.
the house (that)/where i used to live has been knocked down.
第五,与that 有关的常见重要短语。
1. in that,意为“既然、因为”。
criticism and self-criticism is necessary in that it helps us correct our mistakes.
2. now that,意为“既然、由于”。
now that they have taken matters into their hands, the pace of events has quickened.
3. see (to it) that,意为“注意、务必做到、保证”。
we will see to it that she gets home early.
see to it that you are not late again.
4. seeing that,意为“鉴于、由于”。
seeing that it is 8 o'clock, we'll wait no longer.
seeing that he was busy with his work, i didn't disturb him.
篇10:as用法总结
一)as作副词,表示程度,意为“同样地”。在“as...as...”,“not as...as...”结构中的第一个as是副词,作“和/与...(不)一样”解。eg:
Jack is as tall as his father.杰克和他的父亲一样高。
He doesn't speak English as/so fluently as you.他的英语说得不如你流利。
二)as作介词。
1.作“如,像”解。eg:
They got united as one man.他们团结得像一个人一样。
2.作“充当,作为”解。eg:
As a writer,he was famous.作为作家,他是很有名的。
三)as作连词,常用来连接主句和状语从句。
1.引导时间状语从句,作“当...的时候”解,有“随着...”之意,与while意义相近,强调两个动作同时发生;或某事一发生,另一事立即发生。eg:
He shouted aloud as her ran along.他一边往前跑,一边高声地呼喊。
I was startled as he opened the door.他一开门,我吓了一跳。
as作连词,相当于when。eg;
As a little boy (When he was a little boy)he began to learn to play piano.他小时候就开始学弹钢琴。
2.引导原因状语从句,作“因为,由于”解,与because的用法相近。eg;
I must stop writing now,as I have rather a lot of work to do.我必须停笔了,因为我还有许多工作要做。
3.引导方式状语从句或比较状语从句,作“正如,(如)像”解。例eg:
As in your country,we grow wheat in the north and rice in the south.正如(像)你们国家一样,我们在北方种小麦,在南方种大米。(方式状语从句)
When at Rome,do as Romans do.入乡随俗。(方式状语从句)
4.引导让步状语从句,作“虽然,尽管”解。这时从句常用倒装语序,即把从句中的表语、状语或动词原形放在as之前。eg;
Strange as it may seem,it is true.尽管这事看上去很奇怪,但却是真的。
Try as he might,Tom could not get out of the difficulties.不管怎样努力,汤姆还是摆脱不了困境。
四)as作关系代词。
1.引导限制性定语从句,用在“such...as”,“the same...as”,“as...as”等结构中,常译作“像...一样的人(或物)”,“凡是...的人(或物)”。例eg:
He wished to be such a man as Lei Feng was.他曾希望做一个像雷锋那样的人。
My hometown is no longer the same as it was.我的家乡再也不像过去一样了。
2.引导非限制性定语从句,用来指代它前面的整个句子(即先行句),意思是“这一点”。这个分句可以位于句首、句中或句末。eg:
As is well known,oceans cover more than 70% of the earth.我们知道,海洋占地球面积的百分之七十以上。
篇11:that用法总结
that还常用以代替who, whom, which,但that...which中的that用做关系代词的先行词。
that可以用作连词
that用作连词时可引导主语从句、宾语从句、表语从句、同位语从句和状语从句。
that还常引导间接引语或形容词后面的.从句。
that在以it作形式主语的句子中或引导宾语从句、状语从句时常可省略。
篇12:as if 用法总结
从句表示与将来事实相反,谓语动词用“would/could/might+动词原形”。
例句:
You look as if you didn’t care.
你看上去好像并不在乎。
He talks about Rome as if he had been there before.
他说起罗马来好像他以前去过罗马似的。
He opened his mouth as if he would say something.
他张开嘴好像要说什么。
篇13:with用法总结
1、 with 结构修饰名词,with 作后置定语,不紧跟前面名词的情况。
例,Bihar is India's poorest state, with an annual per capita income of $111, lower than that of the mostimpoverished countries of the world.
with 结构 修饰 Bihar
2、with 结构修饰名词,紧跟名词的情况。
例,Under the restructuring, the huge organization that operates the company's basic businesses will be divided into
five groups, each with its own executive.with 结构修饰 each (group)
篇14:or和and用法总结
and和or的用法:
1、and和or的用法并列结构中,or通常用于否定句,and用于肯定句。但有时and 也可用于否定句。
2、在否定中并列结构用or 连接,但含有两个否定词的句子实际被看作是肯定结构,因此要用and。
3、or用于连接并列的单词、词组、短语或句子,表示“或者”的意思。or用在选择疑问句中,灵活译为“还是”。or用于否定句中,代替and ,表示“和”的意思。
4、or用于连接两个并列的句子,表示“否则,要不然”的意思。
and:
1. Remember, keep a positive attitude and good things will happen.
记住:保持乐观的.心态,好事自然会发生。
2. The world breaks everyone, and afterward, many are stronger at the broken places.
生活总是让我们遍体鳞伤,但到后来,那些受伤的地方会变得更坚强。
3. For what do we live, but to make sport for our neighbours, and laugh at them in our turn?
我们活着是为了什么?不就是给邻居当笑柄,再反过来笑他们。
4. When life gets hard and you want to give up, remember that life is full of ups and downs, and without the downs, the ups would mean nothing.
当生活很艰难,你想要放弃的时候,请记住,生活充满了起起落落,如果没有低谷,那站在高处也失去了意义。
5. Good luck is when an opportunity comes along and you're prepared for it.
好运就是当机会来临时,你早已做好了准备。
6. I will return, find you, love you, marry you and live without shame.
我会回去,找到你,爱你,娶你,活的光明正大。《赎罪》
7. It's not about making the amazing saves. It's the little things and small things that made great gatekeepers great.
伟大的门将不是靠神奇的扑救成就,而是靠注重小事和细节成功。
or:
1. No matter where you go in life or how old you get, there's always something new to learn about. After all, life is full of surprises.
不管你生活在哪里,你有多少岁,总有新东西要学习,毕竟,生活总是充满惊喜。
2. Remember, happiness doesn't depend upon who you are or what you have; it depends solely upon what you think.--Dale Carnegie
请记住,幸福不在于你是谁或者你拥有什么,而仅仅取决于你的心态!
3. If your skin becomes red, sore or very scaly, consult your doctor.
如果皮肤发红、瘙痒或脱皮,要向医生咨询。
4. There is nothing sinister or conspiratorial about the export licensing system.
这种出口许可制度没有任何阴险或者见不得人的东西。
5. Do you sweat a lot or flush a lot?
你常出汗或是脸上常发烫吗?
6. Serve the cake warm or at room temperature, cut in squares.
等蛋糕温热或凉至室温时切成四方块端上桌。
7. I started with the Viennese speciality frittatensuppe, or pancake soup.
我吃的第一道菜是维也纳特色菜鸡蛋饼汤,也叫炒饼汤。
篇15:on用法总结
(2)on表示地点、位置,有“在.旁”、“接近”、“靠近”之意.如:
a house on the main road 临大街的房子,sit on my right 坐在我的`右边
(3)on表示状态,译为“处于.情况中,从事于.”等.如:
on duty 值日,on holiday 度假
(4)on表示“在.上面”,用在表示物体的名词前.如:
on the box 在盒子上
on和over都是介词,on表示“在.上面”,指一物体与另一物体表面相接触;over表示“在.上方”,指一物体与另一物体不接触.试比较:
There is a light on the desk.桌子上有盏台灯.(light与desk接触)
There is a light over the desk.桌子上方有一盏灯.(light与desk不接触)
表示“在.上”,介词on与in必须注意习惯用法,否则会出错.不妨比较一番:
on the tree/in the tree都译为“.在树上”.前者表示树上本身所长着的叶子、花、果实等;后者表示某物或某人在树上.
on the wall/in the wall都译为“在墙上”.由于介词不同,在使用上有区别.图画、黑板、风筝等“在墙上”,是因为它们在墙的表面上,故用on the wall;门窗、钉子、洞、孔等“在墙上”,是因为它们在墙的里面,故用in the wall.
有疑问在线交谈 祝你新年快乐 天天开心 心想事成 ...
篇16:EXP00091 Exporting questionable statistics解决
EXP-00091 Exporting questionable statistics解决
在我们对Oracle做EXP的过程中,可能会经常遇到EXP-00091 Exporting questionable statistics.的信息,其实它就是exp的error message,它产生的原因是因为我们exp工具所在的环境变量是的NLS LANG中的NLS_CHARCATERSET不一致引起的,但需要说明的是,EXP-00091这个error对所生成的dump文件没有影响,生成的dump文件还可以正常imp。
下面我们来解决这个问题,让其不再出现:
1.查看DB中的NLS_CHARACTERSET的值(提供两种方法):
查询NLS_CHARACTERSET的值:
select * from nls_database_parameters t where t.parameter='NLS_CHARACTERSET'
or
select * from v$nls_parameters where parameter='NLS_CHARACTERSET';
SQL> select * from v$nls_parameters where parameter='NLS_CHARACTERSET';
PARAMETER VALUE
----------------------- ----------------------------------------------
NLS_CHARACTERSET ZHT16BIG5
2.根据第一步查出的NLS_CHARACTERSET(ZHT16BIG5)来设定exp的环境变量:
WINNT> set NLS_LANG=AMERICAN_AMERICA.ZHT16BIG5
进行设定后,在环境变量中查看NLS_LANG的值是否一致,如果不一致
可在环境变量中手中修改,
LINUX> export NLS_LANG=AMERICAN_AMERICA.ZHT16BIG5
附上exp-00091的oracle error message 解Q方案说明:
error exp 91
00091, 00000, “Exporting questionable statistics.”
// *Cause: Export was able export statistics, but the statistics may not be
// usuable. The statistics are questionable because one or more of
// the following happened during export: a row error occurred, client
// character set or NCHARSET does not match with the server, a query
// clause was specified on export, only certain partitions or
// subpartitions were exported, or a fatal error occurred while
// processing a table.
// *Action: To export non-questionable statistics, change the client character
// set or NCHARSET to match the server, export with no query clause,
// export complete tables. If desired, import parameters can be
// supplied so that only non-questionable statistics will be imported,
// and all questionable statistics will be recalculated.
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