Six Years of ScoX-1 Monitoring with BeppoSAX Wide Field Cameras
a r X i v :a s t r o -p h /0311382v 1 17 N o v 2003
1
Six years of ScoX-1monitoring with BeppoSAX Wide Field Cameras
P.Santolamazza a ,F.Fiore b ,L.Burderi b ,T.Di Salvo c
a ASI Science Data Center c/o ESA/ESRIN,via G.Galilei,Frascati,Italy
b INAF-Osservatorio Astronomico di Roma,via di Frascati 33,I-00040Monteporzio,Italy
c
Astronomical Institute “Anton Pannekoek”,University of Amsterdam,The Netherlands
We performed a systematic analysis of 54Wide Field Camera (WFC)observations of ScoX-1available in the BeppoSAX public archive.Observations span over the six years of BeppoSAX mission lifetime and include 690hr of data.We searched for shifts and shape changes of the Z pattern in the color-color diagrams.We ?nd that the Z pattern occupies most of the time the same locus in the color-color diagram.There are however a few exceptions,which are discussed in detail.
1.Introduction
Sco X-1is a low mass X-ray binary (LMXB),is the brightest extrasolar X-ray source in the sky and was discovered by R.Giacconi and collabo-rators in the seminal X-ray rocket experiment of June 1962.Neutron star LMXB are divided into two classes based upon the di?erent morphology of their tracks in color-color diagrams (CD).The three branches of Z tracks are named Horizon-tal (HB),Normal (NB)and Flaring (FB),while atoll sources are characterized by an “island”and a “banana”state [4].Track morphology is due to spectral variations on timescales of weeks,days or hours.In the case of ScoX-1,the complete Z track is generally traced out in a few hours to a day.Such variations are interpreted as an accre-tion sequence [5],where the mass accretion rate ˙M
is assumed to change along the track (see how-ever [1]).Secular shifts and shape changes of the Z track were reported for several Z sources such as CygX-2[8],whose shifts were interpreted in terms of occultation of the emitting region by a precess-ing accretion disk,or very recently for LMC X-2[10],in which secular shifts of 2.5-10%are seen.Conversely signi?cant secular variations in the Z track of ScoX-1were never observed [2].How-ever an inclination of 45deg and a variable disk thickness could produce the same e?ect,besides reducing the HB extent,as discussed in [3].
2.Observations and Data Reduction We present 54BeppoSAX/WFC [7]observa-tions of the Z source ScoX-1extracted from the BeppoSAX public archive.WFC are coded mask [6]cameras with 40o x40o total ?eld of view (FOV).Data reduction was performed with the WFC software release 204.204.02.To analyze ScoX-1spectral variability we de?ne ?ve energy bands:2.0-
3.5keV;3.5-6.4keV;6.4-9.5keV;9.5-16.4keV;1.7-19.1keV,and two colors.The soft color is the ratio of the 3.5-6.4keV band to the 2.0-3.5keV band and hard color is the ratios of the 9.5-16.4keV band to the 6.4-9.5keV band.Colors are built from light curves with a 300s time binning.
The response of each WFC changed during the six year satellite lifetime and is also a function of the source position in the FOV.In order to study colors and intensity variations we must scale the observed count rates to common position and epoch,that we chose to be the central quadrant of WFC1at January 2002.The scaling was per-formed by using ratios of the expected count rates in the above de?ned energy bands.Count rates were obtained by convolving a model spectrum with the response matrix corresponding to the relevant position in the FOV and epoch.The model spectrum was chosen as close as possible to that of the source to be analyzed.
2
5
10
15
20
1.6
1.7
1.8
1.9
2
1.21.251.31.351.40.85
0.90.951
1.05
Figure 1.Crab Nebula colors and intensity vs o?-axis angle.From the top:hard color,soft color,count rate in the 2.0-19keV band
To test this procedure we studied colors and intensity of the Crab Nebula,assumed to be a steady X-ray source,in more than 100observa-tions in which the source was observed at di?erent o?-axis angles.While we did not ?nd any trend with time we found a residual trend with the o?-axis angle in both colors and intensity (Fig.1).An empirical correction for this trend is extimated through a least square ?t.The deviations at o?-axis angles of 10and 20deg are 3.6%and 7%for the hard color,1.1%and 2.2%for the soft color,6.5%and 13%for the intensity.Since the soft color deviation is always smaller than the statis-tical error we decided not to correct this color.The corrected CD for all Crab Nebula observa-tions in both cameras are reported in Fig.2,the data from the two camera overlap.The spread in both colors is consistent with a gaussian distribu-tion due to data errors and the mean hard color and soft color and their standard deviations are 0.89(0.02)and 1.32(0.02),respectively.The same o?-axis angle corrections were applied to ScoX-1
hard color and intensity.ScoX-1count rates were scaled to a common position and epoch by assum-ing a black body plus a Comptonization model (Xspec compTT model)with spherical geome-try.Model parameter values were ?xed to repre-sent a tipical ScoX-1spectrum at the transition point from NB to FB (hereafter vertex):BB [kT =1.35keV,?2?10=0.97·10?7ergs/cm ?2s ?1];COMPTT [TO =0.36keV,kT =3.2keV,τ=10,?2?10=1.38·10?7ergs/cm ?2s ?1].The Galac-tic column
density was set to the value 3·1021cm ?2as in [1].We will give a more detailed de-scription of corrections in [9].
Figure 2.Crab Nebula CD on the same scale as following CD of ScoX-1.Colors are scaled to the center of WFC1,epoch January 2002,and corrected for the o?-axis angle.3.Results
The light curve of the 1.7-19.1keV count rate in each WFC observation is shown in Fig.3.Points of count rate >27.5come from observations cov-ering the FB only,which is far more luminous than other branches.Conversely other points represent averages over di?erent branches.Ob-servations last from 10ks to 160ks and the net exposure is usually 30%-40%of the dura-tion.To compare observations we divided the
3 Figure3.Light curve of the total count rate per
observation in the1.7-19.1keV band
data in9CD according to the date[1996-97,
1998-99,2000-01]and to the o?-axis angle[5-14
deg,14-17deg and17-20deg].Most observations
have vertices at colors about soft=1.5,hard=0.47
and FB passing through soft=1.8,hard=0.54,see
e.g.observations00001061in Fig.4a,20947008
in Fig.4b,20143001in Fig.4d,and all observa-
tions in Fig.4h.This we call the more common
state.However we note some exceptions:obser-
vation20274001in Fig.4a reaches very low values
in both soft color and hard color,its vertex and
FB colors are about6-8%lower than the com-
mon state location of NB/FB branches;in Fig.4b
the vertex and NB of observation60539002locate
at colors lower by about4%compared with the
common state location.These shifts indicate sec-
ular variations of the track location on timescales
of months to years.Moreover in Fig.4d the low-
est points of observations00001054and00001076
lie below the common state vertex location by
about5%in soft color and13%in hard color.
These observations are part of the only available
nearly continuous monitoring of ScoX-1that lasts
more than160ks,from September13to17in
1996.These observations are plotted on di?er-
ent panels because of their di?erent o?-axis an-
gles;we checked that the scaling procedure and
o?-axis angle correction work well by reporting
monitoring observations at di?erent o?-axis an-
gles on a same plot and verifying that they build
up at least three complete Z pattern consistently.
These Z tracks show a maximum shift of13%in
soft color and6%in hard color among them,sug-
gesting that the track location can also vary on
timescales of days.In Fig.4g and Fig.4h the point
spread is wide because errors are larger at these
o?-axis angles,but the general?nding of a com-
mon state holds.In Fig.4i the superposition of
all observations is shifted to slightly lower values
of hard color.Finally we notice that observation
613150011in Fig.4c is peculiar,tracing out the
HB and NB but never reaching the FB though
the duration is about160ksec.Note that in other
long observations,such as observation20274001
in Fig.4a,the source moves from HB to the FB
and back at least twice on a comparable time.
4.Conclusions
Analysis of ScoX-1CD,spanning over the six
years of BeppoSAX lifetime,show that most of
the time the track covers the same position.How-
ever there are few noticeable exceptions.The
most evident is a shift of the vertex and FB
positions towards soft color and hard color6-
13%lower than the more common position.This
shifts are observed on timescales of years or even
months.Moreover we?nd indications that shifts
appear also on shorter timescale(days).Detailed
analysis is in progress to con?rm this latter point.
REFERENCES
1.R.Barnard,M.J.Church and M.Balucinska-
Church2003,A&A405,237
2.S.W.Dieters and M.van der Klis2000,MN-
RAS311,201.
3. E.B.Fomalont,B.J.Geldzhaler and C.F.
Bradshaw2001,ApJ558,283.
4.G.Hasinger and M.van der Klis1989,A&A
225,79.
5.G.Hasinger et al1989,ApJ337,843.
6.J.J.M.in’t Zand1992,Ph.D.Thesis,Uni-
versity of Utrecht
7.R.Jager et al1997,A&ASS125,557.
8. E.Kuulkers,M.van der Klis and B. A.
Vaughan1996,A&A311,197.
9.P.Santolamazza et al2003,in preparation
10.A.P.Smale,J.Homan and E.Kuulkers2003,
ApJ590,1035.
4
Figure4.CD of ScoX-1grouped according to the date and to the o?-axis angle.Observation codes are
初中英语代词用法全解及练习含答案
1、人称代词顺口溜：人称代词有两类，一类主格一类宾；主格代词本领大，一切动作由它发；宾格代词不动脑，介动之后跟着跑。 2、物主代词顺口溜：物主代词不示弱，带着‘白勺’来捣乱；形容词性物主代，抓住名词不放松； 1、人称代词的主格在句子中作主语或主语补语。一般在句首，动词前。 例如：John waited a while but eventually he went home. 约翰等了一会儿，最后他回家了。 John hoped the passenger would be Mary and indeed it was she. 约翰希望那位乘客是玛丽，还真是她。 说明：在复合句中，如果主句和从句主语相同，代词主语要用在从句中，名词主语用在主句中。在电话用语中常用主格。 例如：When he arrived, John went straight to the bank. 约翰一到就直接去银行了。 I wish to speak to Mary. This is she. 我想和玛丽通话，我就是玛丽。 2、人称代词的宾格在句中作宾语或表语，在动词或介词后。 例如：Do you know him？(作宾语) 你认识他吗？ Who is knocking at the door？It’s me. (作表语) 是谁在敲门？是我。 说明：单独使用的人称代词通常用宾格，即使它代表主语时也是如此。 例如：I like English. Me too. 我喜欢英语。我也喜欢。 3、注意：在动词be 或to be 后的人称代词视其前面的名词或代词而定。 例如：I thought it was she.我以为是她。(主格----主格) I thought it to be her.(宾格----宾格) I was taken to be she.我被当成了她。(主格----主格) They took me to be her.他们把我当成了她。(宾格----宾格) 4、人称代词并列时的排列顺序 1）单数人称代词并列作主语时，其顺序为： 第二人称→第三人称→第一人称 即you and I he/she/it and I you, he/she/it and I 顺口溜：第一人称最谦虚，但若错误责任担，第一人称学当先。 例如：It was I and John that made her angry. 2）复数人称代词作主语时，其顺序为： 第一人称→第二人称→第三人称 即we and you you and they we, you and they
With的用法全解
With的用法全解 with结构是许多英语复合结构中最常用的一种。学好它对学好复合宾语结构、不定式复合结构、动名词复合结构和独立主格结构均能起很重要的作用。本文就此的构成、特点及用法等作一较全面阐述，以帮助同学们掌握这一重要的语法知识。 一、 with结构的构成 它是由介词with或without+复合结构构成，复合结构作介词with或without的复合宾语，复合宾语中第一部分宾语由名词或代词充当，第二部分补足语由形容词、副词、介词短语、动词不定式或分词充当，分词可以是现在分词，也可以是过去分词。With结构构成方式如下： 1. with或without-名词/代词+形容词； 2. with或without-名词/代词+副词； 3. with或without-名词/代词+介词短语； 4. with或without-名词/代词 +动词不定式； 5. with或without-名词/代词 +分词。 下面分别举例： 1、 She came into the room，with her nose red because of cold.（with+名词+形容词，作伴随状语）
2、 With the meal over ， we all went home.（with+名词+副词，作时间状语） 3、The master was walking up and down with the ruler under his arm。（with+名词+介词短语，作伴随状语。） The teacher entered the classroom with a book in his hand. 4、He lay in the dark empty house，with not a man ，woman or child to say he was kind to me.（with+名词+不定式，作伴随状语）He could not finish it without me to help him.（without+代词 +不定式，作条件状语） 5、She fell asleep with the light burning.（with+名词+现在分词，作伴随状语） Without anything left in the with结构是许多英 语复合结构中最常用的一种。学好它对学好复合宾语结构、不定式复合结构、动名词复合结构和独立主格结构均能起很重要的作用。本文就此的构成、特点及用法等作一较全面阐述，以帮助同学们掌握这一重要的语法知识。 二、with结构的用法 with是介词，其意义颇多，一时难掌握。为帮助大家理清头绪，以教材中的句子为例，进行分类，并配以简单的解释。在句子中with结构多数充当状语，表示行为方式，伴随情况、时间、原因或条件（详见上述例句）。 1.带着，牵着…… (表动作特征)。如： Run with the kite like this.
精神分裂症的病因及发病机理
精神分裂症的病因及发病机理 精神分裂症病因：尚未明，近百年来的研究结果也仅发现一些可能的致病因素。（一）生物学因素1．遗传遗传因素是精神分裂症最可能的一种素质因素。国内家系调查资料表明：精神分裂症患者亲属中的患病率比一般居民高6.2倍，血缘关系愈近，患病率也愈高。双生子研究表明：遗传信息几乎相同的单卵双生子的同病率远较遗传信息不完全相同 的双卵双生子为高，综合近年来11项研究资料：单卵双生子同病率（56.7%），是双卵双生子同病率（12.7%）的4.5倍，是一般人口患难与共病率的35-60倍。说明遗传因素在本病发生中具有重要作用，寄养子研究也证明遗传因素是本症发病的主要因素，而环境因素的重要性较小。以往的研究证明疾病并不按类型进行遗传，目前认为多基因遗传方式的可能性最大，也有人认为是常染色体单基因遗传或多源性遗传。Shields发现病情愈轻，病因愈复杂，愈属多源性遗传。高发家系的前瞻性研究与分子遗传的研究相结合，可能阐明一些问题。国内有报道用人类原癌基因Ha-ras-1为探针，对精神病患者基因组进行限止性片段长度多态性的分析，结果提示11号染色体上可能存在着精神分裂症与双相情感性精神病有关的DNA序列。2．性格特征：约40%患者的病前性格具有孤僻、冷淡、敏感、多疑、富于幻想等特征，即内向
型性格。3．其它：精神分裂症发病与年龄有一定关系，多发生于青壮年，约1/2患者于20～30岁发病。发病年龄与临床类型有关，偏执型发病较晚，有资料提示偏执型平均发病年龄为35岁，其它型为23岁。80年代国内12地区调查资料：女性总患病率（7.07%。）与时点患病率（5.91%。）明显高于男性（4.33%。与3.68%。）。Kretschmer在描述性格与精神分裂症关系时指出：61%患者为瘦长型和运动家型，12.8%为肥胖型，11.3%发育不良型。在躯体疾病或分娩之后发生精神分裂症是很常见的现象，可能是心理性生理性应激的非特异性影响。部分患者在脑外伤后或感染性疾病后发病；有报告在精神分裂症患者的脑脊液中发现病毒性物质；月经期内病情加重等躯体因素都可能是诱发因素，但在精神分裂症发病机理中的价值有待进一步证实。（二）心理社会因素1．环境因素①家庭中父母的性格，言行、举止和教育方式（如放纵、溺爱、过严）等都会影响子女的心身健康或导致个性偏离常态。②家庭成员间的关系及其精神交流的紊乱。③生活不安定、居住拥挤、职业不固定、人际关系不良、噪音干扰、环境污染等均对发病有一定作用。农村精神分裂症发病率明显低于城市。2．心理因素一般认为生活事件可发诱发精神分裂症。诸如失学、失恋、学习紧张、家庭纠纷、夫妻不和、意处事故等均对发病有一定影响，但这些事件的性质均无特殊性。因此，心理因素也仅属诱发因
with的用法大全
with的用法大全----四级专项训练with结构是许多英语复合结构中最常用的一种。学好它对学好复合宾语结构、不定式复合结构、动名词复合结构和独立主格结构均能起很重要的作用。本文就此的构成、特点及用法等作一较全面阐述，以帮助同学们掌握这一重要的语法知识。 一、 with结构的构成 它是由介词with或without+复合结构构成，复合结构作介词with或without的复合宾语，复合宾语中第一部分宾语由名词或代词充当，第二部分补足语由形容词、副词、介词短语、动词不定式或分词充当，分词可以是现在分词，也可以是过去分词。With结构构成方式如下： 1. with或without-名词/代词+形容词; 2. with或without-名词/代词+副词; 3. with或without-名词/代词+介词短语; 4. with或without-名词/代词+动词不定式; 5. with或without-名词/代词+分词。 下面分别举例：
1、 She came into the room，with her nose red because of cold.(with+名词+形容词，作伴随状语) 2、 With the meal over ， we all went home.(with+名词+副词，作时间状语) 3、The master was walking up and down with the ruler under his arm。(with+名词+介词短语，作伴随状语。) The teacher entered the classroom with a book in his hand. 4、He lay in the dark empty house，with not a man ，woman or child to say he was kind to me.(with+名词+不定式，作伴随状语) He could not finish it without me to help him.(without+代词 +不定式，作条件状语) 5、She fell asleep with the light burning.(with+名词+现在分词，作伴随状语) 6、Without anything left in the cupboard， she went out to get something to eat.(without+代词+过去分词，作为原因状语) 二、with结构的用法 在句子中with结构多数充当状语，表示行为方式，伴随情况、时间、原因或条件(详见上述例句)。
with用法归纳
with用法归纳 （1）“用……”表示使用工具，手段等。例如： ①We can walk with our legs and feet. 我们用腿脚行走。 ②He writes with a pencil. 他用铅笔写。 （2）“和……在一起”，表示伴随。例如： ①Can you go to a movie with me? 你能和我一起去看电影'>电影吗？ ②He often goes to the library with Jenny. 他常和詹妮一起去图书馆。 （3）“与……”。例如： I’d like to have a talk with you. 我很想和你说句话。 （4）“关于，对于”，表示一种关系或适应范围。例如： What’s wrong with your watch? 你的手表怎么了？ （5）“带有，具有”。例如： ①He’s a tall kid with short hair. 他是个长着一头短发的高个子小孩。 ②They have no money with them. 他们没带钱。 （6）“在……方面”。例如： Kate helps me with my English. 凯特帮我学英语。 （7）“随着，与……同时”。例如： With these words, he left the room. 说完这些话，他离开了房间。 [解题过程] with结构也称为with复合结构。是由with+复合宾语组成。常在句中做状语，表示谓语动作发生的伴随情况、时间、原因、方式等。其构成有下列几种情形： 1.with+名词(或代词)+现在分词 此时，现在分词和前面的名词或代词是逻辑上的主谓关系。 例如:1)With prices going up so fast, we can't afford luxuries. 由于物价上涨很快，我们买不起高档商品。（原因状语） 2)With the crowds cheering, they drove to the palace. 在人群的欢呼声中，他们驱车来到皇宫。（伴随情况） 2.with+名词(或代词)+过去分词 此时，过去分词和前面的名词或代词是逻辑上的动宾关系。
独立主格with用法小全
独立主格篇 独立主格，首先它是一个“格”，而不是一个“句子”。在英语中任何一个句子都要有主谓结构，而在这个结构中，没有真正的主语和谓语动词，但又在逻辑上构成主谓或主表关系。独立主格结构主要用于描绘性文字中，其作用相当于一个状语从句，常用来表示时间、原因、条件、行为方式或伴随情况等。除名词/代词+名词、形容词、副词、非谓语动词及介词短语外，另有with或without短语可做独立主格，其中with可省略而without不可以。*注：独立主格结构一般放在句首，表示原因时还可放在句末；表伴随状况或补充说明时，相当于一个并列句，通常放于句末。 一、独立主格结构： 1. 名词/代词+形容词 He sat in the front row, his mouth half open. Close to the bank I saw deep pools, the water blue like the sky. 靠近岸时，我看见几汪深池塘，池水碧似蓝天。 2. 名词/代词+现在分词 Winter coming, it gets colder and colder. The rain having stopped, he went out for a walk.
The question having been settled, we wound up the meeting. 也可以The question settled, we wound up the meeting. 但含义稍有差异。前者强调了动作的先后。 We redoubled our efforts, each man working like two. 我们加倍努力，一个人干两个人的活。 3. 名词/代词+过去分词 The job finished, we went home. More time given, we should have done the job much better. *当表人体部位的词做逻辑主语时，不及物动词用现在分词，及物动词用过去分词。 He lay there, his teeth set, his hands clenched, his eyes looking straight up. 他躺在那儿，牙关紧闭，双拳紧握，两眼直视上方。 4. 名词/代词+不定式 We shall assemble at ten forty-five, the procession to start moving at precisely eleven. We divided the work, he to clean the windows and I to sweep the floor.
精神分裂症的发病原因是什么
精神分裂症的发病原因是什么 精神分裂症是一种精神病，对于我们的影响是很大的，如果不幸患上就要及时做好治疗，不然后果会很严重，无法进行正常的工作和生活，是一件很尴尬的事情。因此为了避免患上这样的疾病，我们就要做好预防，今天我们就请广州协佳的专家张可斌来介绍一下精神分裂症的发病原因。 精神分裂症是严重影响人们身体健康的一种疾病，这种疾病会让我们整体看起来不正常，会出现胡言乱语的情况，甚至还会出现幻想幻听，可见精神分裂症这种病的危害程度。 (1)精神刺激：人的心理与社会因素密切相关，个人与社会环境不相适应，就产生了精神刺激，精神刺激导致大脑功能紊乱，出现精神障碍。不管是令人愉快的良性刺激，还是使人痛苦的恶性刺激，超过一定的限度都会对人的心理造成影响。 (2)遗传因素：精神病中如精神分裂症、情感性精神障碍，家族中精神病的患病率明显高于一般普通人群，而且血缘关系愈近，发病机会愈高。此外，精神发育迟滞、癫痫性精神障碍的遗传性在发病因素中也占相当的比重。这也是精神病的病因之一。 (3)自身：在同样的环境中，承受同样的精神刺激，那些心理素质差、对精神刺激耐受力低的人易发病。通常情况下，性格内向、心胸狭窄、过分自尊的人，不与人交往、孤僻懒散的人受挫折后容易出现精神异常。 (4)躯体因素：感染、中毒、颅脑外伤、肿瘤、内分泌、代谢及营养障碍等均可导致精神障碍，。但应注意，精神障碍伴有的躯体因素，并不完全与精神症状直接相关，有些是由躯体因素直接引起的，有些则是以躯体因素只作为一种诱因而存在。 孕期感染。如果在怀孕期间，孕妇感染了某种病毒，病毒也传染给了胎儿的话，那么，胎儿出生长大后患上精神分裂症的可能性是极其的大。所以怀孕中的女性朋友要注意卫生，尽量不要接触病毒源。 上述就是关于精神分裂症的发病原因，想必大家都已经知道了吧。患上精神分裂症之后，大家也不必过于伤心，现在我国的医疗水平是足以让大家快速恢复过来的，所以说一定要保持良好的情绪。
with用法小结
with用法小结 一、with表拥有某物 Mary married a man with a lot of money . 马莉嫁给了一个有着很多钱的男人。 I often dream of a big house with a nice garden . 我经常梦想有一个带花园的大房子。 The old man lived with a little dog on the lonely island . 这个老人和一条小狗住在荒岛上。 二、with表用某种工具或手段 I cut the apple with a sharp knife . 我用一把锋利的刀削平果。 Tom drew the picture with a pencil . 汤母用铅笔画画。 三、with表人与人之间的协同关系 make friends with sb talk with sb quarrel with sb struggle with sb fight with sb play with sb work with sb cooperate with sb I have been friends with Tom for ten years since we worked with each other, and I have never quarreled with him . 自从我们一起工作以来，我和汤姆已经是十年的朋友了，我们从没有吵过架。 四、with 表原因或理由 John was in bed with high fever . 约翰因发烧卧床。 He jumped up with joy . 他因高兴跳起来。 Father is often excited with wine . 父亲常因白酒变的兴奋。 五、with 表“带来”，或“带有,具有”，在…身上，在…身边之意
精神分裂症的病因是什么
精神分裂症的病因是什么 精神分裂症是一种精神方面的疾病，青壮年发生的概率高，一般 在16～40岁间，没有正常器官的疾病出现，为一种功能性精神病。 精神分裂症大部分的患者是由于在日常的生活和工作当中受到的压力 过大，而患者没有一个良好的疏导的方式所导致。患者在出现该情况 不仅影响本人的正常社会生活，且对家庭和社会也造成很严重的影响。 精神分裂症常见的致病因素： 1、环境因素：工作环境比如经济水平低低收入人群、无职业的人群中，精神分裂症的患病率明显高于经济水平高的职业人群的患病率。还有实际的生活环境生活中的不如意不开心也会诱发该病。 2、心理因素：生活工作中的不开心不满意，导致情绪上的失控，心里长期受到压抑没有办法和没有正确的途径去发泄，如恋爱失败， 婚姻破裂，学习、工作中不愉快都会成为本病的原因。 3、遗传因素：家族中长辈或者亲属中曾经有过这样的病人，后代会出现精神分裂症的机会比正常人要高。 4、精神影响：人的心里与社会要各个方面都有着不可缺少的联系，对社会环境不适应，自己无法融入到社会中去，自己与社会环境不相
适应，精神和心情就会受到一定的影响，大脑控制着人的精神世界， 有可能促发精神分裂症。 5、身体方面：细菌感染、出现中毒情况、大脑外伤、肿瘤、身体的代谢及营养不良等均可能导致使精神分裂症，身体受到外界环境的 影响受到一定程度的伤害，心里受到打击，无法承受伤害造成的痛苦，可能会出现精神的问题。 对于精神分裂症一定要配合治疗，接受全面正确的治疗，最好的 疗法就是中医疗法加心理疗法。早发现并及时治疗并且科学合理的治疗，不要相信迷信，要去正规的医院接受合理的治疗，接受正确的治 疗按照医生的要求对症下药，配合医生和家人，给病人创造一个良好 的治疗环境，对于该病的康复和痊愈会起到意想不到的效果。
comparison的用法解析大全
comparison的用法解析大全 comparison的意思是比较，比喻，下面我把它的相关知识点整理给大家，希望你们会喜欢！ 释义 comparison n. 比较;对照;比喻;比较关系 [ 复数 comparisons ] 词组短语 comparison with 与…相比 in comparison adj. 相比之下;与……比较 in comparison with 与…比较，同…比较起来 by comparison 相比之下，比较起来 comparison method 比较法 make a comparison 进行比较 comparison test 比较检验 comparison theorem 比较定理 beyond comparison adv. 无以伦比 comparison table 对照表 comparison shopping 比较购物;采购条件的比较调查 paired comp arison 成对比较 同根词 词根： comparing adj. comparative 比较的;相当的 comparable 可比较的;比得上的 adv. comparatively 比较地;相当地 comparably 同等地;可比较地 n.
comparative 比较级;对手 comparing 比较 comparability 相似性;可比较性 v. comparing 比较;对照(compare的ing形式) 双语例句 He liked the comparison. 他喜欢这个比喻。 There is no comparison between the two. 二者不能相比。 Your conclusion is wrong in comparison with their conclusion. 你们的结论与他们的相比是错误的。 comparison的用法解析大全相关文章： 1.by的用法总结大全
With_复合结构详解
介词With 复合结构讲解及练习 with复合结构的作用：with复合结构在句子中作状语，表示原因、时间、条件、伴随、方式等. 1）We sat on the dry grass with our backs to the wall.（作伴随状语） 2）She could not leave with her painful duty unfulfilled.（作原因状语） 3）He lay in bed with his head covered.（作方式状语） 4）Jack soon fell asleep with the light still burning.（作伴随状语） 5）I won't be able to go on holiday with my mother being ill.（作原因状语） 6）He sat with his arms clasped around his knees.（作方式状语） 注：with复合结构在句子中还可以作定语，阅读下面的句子。 1）There was a letter for Lanny with a Swiss stamp on it.（作定语修饰letter） 2）It was a vast stretch of country with cities in the distance.（作定语修饰a stretch of country）1) with +宾语+ 现在（短分词语） When mother went into the house, she found her baby was sleeping in bed, with his lips moving. 当妈妈走进房子的时候，她发现自己的孩子正睡在床上，嘴唇一直在动。 My aunt lives in the room with the windows facing south. 我姑妈住在那间窗户朝南开的房间。 With winter coming on，it's time to buy warm clothes 2)with +宾语+ 过去分词（短语） With more and more forests damaged ,some animals and plants are facing the danger of dying out. 由于越来越多的森林遭到破坏，一些动植物正面临着灭绝的危险。 With his legs broken, he had to lie in bed for a long time. 他双腿都断了，只得长时间躺在床上。 3) with +宾语+ 不定式（短语） * With so many children to look after, the nurse is busy all the time. 有这么多的孩子需要照顾，保育员一直都很忙。 *With a lot of papers to correct, M r. Li didn’t attend the party. 李老师有许多试卷需要批改，所以没有参加聚会。 4) with +宾语+ 副词 * You should read with the radio off. 在看书的时候应该把收音机关掉。 * With the temperature up, we had to open all the windows. 气温上升，我们不得不打开所有的窗户。 5) with +宾语+形容词 *With the window open, I felt a bit cold. 窗户开着，我感到有点冷。 * It was cold outside , the boy ran into the room with his nose red. 外面天气很冷，那个男孩跑进了屋子时，鼻子红红的。 6) with +宾语+ 介词短语 * The woman with a baby in her arms is getting on the bus. 怀里抱着婴儿的那位妇女正在上车。 * John starts to work very clearly in the morning and goes on working until late in the afternoon with a break at midday . 约翰早上开始工作，中午稍作休息后又接着工作到下午稍晚些时候。
with的用法
with[wIT] prep.1.与…(在)一起，带着：Come with me. 跟我一起来吧。/ I went on holiday with my friend. 我跟我朋友一起去度假。/ Do you want to walk home with me? 你愿意和我一道走回家吗 2.(表带有或拥有)有…的，持有，随身带着：I have no money with me. 我没有带钱。/ He is a man with a hot temper. 他是一个脾气暴躁的人。/ We bought a house with a garden. 我们买了一座带花园的房子。/ China is a very large country with a long history. 中国是一个具有历史悠久的大国。3.(表方式、手段或工具)以，用：He caught the ball with his left hand. 他用左手接球。/ She wrote the letter with a pencil. 她用铅笔写那封信。4.(表材料或内容)以，用：Fill the glass with wine. 把杯子装满酒。/ The road is paved with stones. 这条路用石头铺砌。5.(表状态)在…的情况下，…地：He can read French with ease. 他能轻易地读法文。/ I finished my homework though with difficulty. 虽然有困难，我还是做完了功课。6.(表让步)尽管，虽然：With all his money, he is unhappy. 尽管他有钱，他并不快乐。/ With all his efforts, he lost the match. 虽然尽了全力，他还是输了那场比赛。7.(表条件)若是，如果：With your permission, I’ll go. 如蒙你同意我就去。8.(表原因或理由)因为，由于：He is tired with work. 他工作做累了。/ At the news we all jumped with joy. 听到这消息我们都高兴得跳了起来。9.(表时间)当…的时候，在…之后：With that remark, he left. 他说了那话就离开了。/ With daylight I hurried there to see what had happened. 天一亮我就去那儿看发生了什么事。10. (表同时或随同)与…一起，随着：The girl seemed to be growing prettier with each day. 那女孩好像长得一天比一天漂亮。11.(表伴随或附带情况)同时：I slept with the window open. 我开着窗户睡觉。/ Don’t speak with your mouth full. 不要满嘴巴食物说话。12.赞成，同意：I am with you there. 在那点上我同你意见一致。13.由…照看，交…管理，把…放在某处：I left a message for you with your secretary. 我给你留了个信儿交给你的秘书了。/ The keys are with reception. 钥匙放在接待处。14 (表连同或包含)连用，包含：The meal with wine came to ￡8 each. 那顿饭连酒每人8英镑。/ With preparation and marking a teacher works 12 hours a day. 一位老师连备课带批改作业每天工作12小时。15. (表对象或关系)对，关于，就…而言，对…来说：He is pleased with his new house. 他对他的新房子很满意。/ The teacher was very angry with him. 老师对他很生气。/ It’s the same with us students. 我们学生也是这样。16.(表对立或敌对)跟，以…为对手：The dog was fighting with the cat. 狗在同猫打架。/ He’s always arguing with his brother. 他老是跟他弟弟争论。17.(在祈使句中与副词连用)：Away with him! 带他走！/ Off with your clothes! 脱掉衣服！/ Down with your money! 交出钱来！ 【用法】1.表示方式、手段或工具等时(=以，用)，注意不要受汉语意思的影响而用错搭配，如“用英语”习惯上用in English，而不是with English。2.与某些抽象名词连用时，其作用相当于一个副词：with care=carefully 认真地/ with kindness=kindly 亲切地/ with joy=joyfully 高兴地/ with anger=angrily 生气地/ with sorrow=sorrowfully 悲伤地/ with ease=easily 容易地/ with delight=delightedly 高兴地/ with great fluency =very fluently 很流利地3.表示条件时，根据情况可与虚拟语气连用：With more money I would be able to buy it. 要是钱多一点，我就买得起了。/ With better equipment, we could have finished the job even sooner. 要是设备好些，我们完成这项工作还要快些。4.比较with 和as：两者均可表示“随着”，但前者是介词，后者是连词：He will improve as he grows older. 随着年龄的增长，他会进步的。/ People’s ideas change with the change of the times. 时代变了，人们的观念也会变化。5.介词with和to 均可表示“对”，但各自的搭配不同，注意不要受汉语意思的影响而用错，如在kind, polite, rude, good, married等形容词后通常不接介词with而接to。6.复合结构“with+宾语+宾语补足语”是一个很有用的结构，它在句中主要用作状语，表示伴随、原因、时间、条件、方式等；其中的宾语补足语可以是名词、形容词、副词、现在分词、过去分词、不定式、介词短语等：I went out with the windows open. 我外出时没有关窗户。/ He stood before his teacher with his head down. 他低着头站在老师面前。/ He was lying on the bed with all his clothes on. 他和衣躺在床上。/ He died with his daughter yet a schoolgirl. 他去世时，女儿还是个小学生。/ The old man sat there with a basket beside her. 老人坐在那儿，身边放着一个篮子。/ He fell asleep with the lamp burning. 他没熄灯就睡着了。/ He sat there with his eyes closed. 他闭目坐在那儿。/ I can’t go out with all these clothes to wash. 要洗这些衣服，我无法出去了。这类结构也常用于名词后作定语：The boy with nothing on is her son. 没穿衣服的这个男孩子是她儿子。 （摘自《英语常用词多用途词典》金盾出版社） - 1 -
精神分裂症应该怎么治疗
精神分裂症应该怎么治疗 1、坚持服药治疗 服药治疗是最有效的预防复发措施临床大量统计资料表明，大多数精神分裂症的复发与自行停药有关。坚持维持量服药的病人复发率为40%。而没坚持维持量服药者复发率高达80%。因此，病人和家属要高度重视维持治疗。 2、及时发现复发的先兆，及时处理 精神分裂症的复发是有先兆的，只要及时发现，及时调整药物和剂量，一般都能防止复发，常见的复发先兆为：病人无原因出现睡眠不好、懒散、不愿起床、发呆发愣、情绪不稳、无故发脾气、烦躁易怒、胡思乱想、说话离谱，或病中的想法又露头等。这时就应该及时就医，调整治疗病情波动时的及时处理可免于疾病的复发。 3、坚持定期门诊复查 一定要坚持定期到门诊复查，使医生连续地、动态地了解病情，使病人经常处于精神科医生的医疗监护之下，及时根据病情变化调整药量。通过复查也可使端正人及时得到咨询和心理治疗解除病人在生活、工作和药物治疗中的各种困惑，这对预防精神分裂症的复发也起着重要作用。 4、减少诱发因素 家属及周围人要充分认识到精神分裂症病人病后精神状态的薄弱性，帮助安排好日常的生活、工作、学习。经常与病人谈心，帮助病人正确对待疾病，正确对待现实生活，帮助病人提高心理承受能力，学会对待应激事件的方法，鼓励病人增强信心，指导病人充实生活，使病人在没有心理压力和精神困扰的环境中生活。 首先是性格上的改变，塬本活泼开朗爱玩的人，突然变得沉默寡言，独自发呆，不与人交往，爱干净的人也变的不注意卫生、生活
懒散、纪律松弛、做事注意力不集中，总是和患病之前的性格完全 相悖。 再者就是语言表达异常，在谈话中说一些无关的谈话内容，使人无法理解。连最简单的话语都无法准确称述，与之谈话完全感觉不 到重心。 第三个就是行为的异常，行为怪异让人无法理解，喜欢独处、不适意的追逐异性，不知廉耻，自语自笑、生活懒散、时常发呆、蒙 头大睡、四处乱跑，夜不归宿等。 还有情感上的变化，失去了以往的热情，开始变的冷淡、对亲人不关心、和友人疏远，对周围事情不感兴趣，一点消失都可大动干戈。 最后就是敏感多疑，对任何事情比较敏感，精神分裂症患者，总认为有人针对自己。甚至有时认为有人要害自己，从而不吃不喝。 但是也有的会出现难以入眠、容易被惊醒或睡眠不深，整晚做恶梦或者长睡不醒的现象。这些都有可能是患上了精神分裂症。 1.加强心理护理 心理护理是家庭护理中的重要方面，由于社会上普遍存在对精神病人的歧视和偏见，给病人造成很大的精神压力，常表现为自卑、 抑郁、绝望等，有的病人会因无法承受压力而自杀。家属应多给予 些爱心和理解，满足其心理需求，尽力消除病人的悲观情绪。病人 生活在家庭中，与亲人朝夕相处，接触密切，家属便于对病人的情感、行为进行细致的观察，病人的思想活动也易于向家属暴露。家 属应掌握适当的心理护理方法，随时对病人进行启发与帮助，启发 病人对病态的认识，帮助他们树立自信，以积极的心态好地回归社会。 2.重视服药的依从性 精神分裂症病人家庭护理的关键就在于要让病人按时按量吃药维持治疗。如果不按时服药，精神病尤其是精神分裂症的复发率很高。精神病人在医院经过一系统的治疗痊愈后，一般需要维持2~3年的
动名词使用全解
动名词是一种兼有动词和名词特征的非谓语动词。它可以支配宾语，也能被副词修饰。动名词有时态和语态的变化。 解释：动词的ing形式如果是名词，这个词称动名词。 特征：动词原形+ing构成，具有名词，动词一些特征 一、动名词的作用 动名词具有名词的性质，因此在句中可以作主语、表语、宾语、定语等。 1、作主语 Reading is an art. 读书是一种艺术。 Climbing mountains is really fun. 爬山是真有趣。 Working in these conditions is not a pleasure but a suffer. 在这种工作条件下工作不是愉快而是痛苦。 动名词作主语，有时先用it作形式主语，把动名词置于句末。这种用法在习惯句型中常用。如： It is no use/no good crying over spilt milk. 洒掉的牛奶哭也没用。 It is a waste of time persuading such a person to join us. 劝说这样的人加入真是浪费时间。 It was hard getting on the crowded street car. 上这种拥挤的车真难。 It is fun playing with children. 和孩子们一起玩真好。 There is no joking about such matters. 对这种事情不是开玩笑。 动名词作主语的几种类型 动名词可以在句子中充当名词所能充当的多种句子成分。在这里仅就动名词在句子中作主语的情况进行讨论。 动名词作主语有如下几种常见情况： 1. 直接位于句首做主语。例如： Swimming is a good sport in summer. 2. 用it 作形式主语，把动名词(真实主语)置于句尾作后置主语。 动名词做主语时，不太常用it 作先行主语，多见于某些形容词及名词之后。例如： It is no use telling him not to worry. 常见的能用于这种结构的形容词还有：better，wonderful，enjoyable，interesti ng，foolish，difficult，useless，senseless，worthwhile，等。 注意：important，essential，necessary 等形容词不能用于上述结构。 3. 用于“There be”结构中。例如： There is no saying when he'll come.很难说他何时回来。 4. 用于布告形式的省略结构中。例如： No smoking ( =No smoking is allowed (here) ). （禁止吸烟） No parking. （禁止停车） 5. 动名词的复合结构作主语
介词with的用法大全
介词with的用法大全 With是个介词，基本的意思是“用”，但它也可以协助构成一个极为多采多姿的句型，在句子中起两种作用；副词与形容词。 with在下列结构中起副词作用： 1.“with+宾语+现在分词或短语”，如： (1) This article deals with common social ills, with particular attention being paid to vandalism. 2.“with+宾语+过去分词或短语”，如： (2) With different techniques used, different results can be obtained. (3) The TV mechanic entered the factory with tools carried in both hands. 3.“with+宾语+形容词或短语”，如： (4) With so much water vapour present in the room, some iron-made utensils have become rusty easily. (5) Every night, Helen sleeps with all the windows open. 4.“with+宾语＋介词短语”，如： (6) With the school badge on his shirt, he looks all the more serious. (7) With the security guard near the gate no bad character could do any thing illegal. 5.“with+宾语＋副词虚词”，如： (8) You cannot leave the machine there with electric power on. (9) How can you lock the door with your guests in? 上面五种“with”结构的副词功能，相当普遍，尤其是在科技英语中。 接着谈“with”结构的形容词功能，有下列五种： 一、“with+宾语+现在分词或短语”，如： (10) The body with a constant force acting on it. moves at constant pace. (11) Can you see the huge box with a long handle attaching to it ? 二、“with+宾语+过去分词或短语” (12) Throw away the container with its cover sealed. (13) Atoms with the outer layer filled with electrons do not form compounds. 三、“with+宾语+形容词或短语”，如： (14) Put the documents in the filing container with all the drawers open.