In order to build a healthy and civilized city,we students should try our best to behave well in many ways.First of all,we must respect old people and polite1 to others.Second,we should make our city clean every day....In order to build a healthy and civilized city,we students should try our best to behave well in many ways.First of all,we must respect old people and polite1 to others.Second,we should make our city clean every day.Don’t throw litter here and there.Third,it’s polite to say'Thank you','Please'and so on.We should never speak2 dirty words.Be friendly to others and always be ready to help others.展开更多
当代英语中表示“请”含义的最常用的有三个词,即 please,kindly 和 just。这几个词看似简单,但在实际使用中比我们想象的要复杂得多。现辨析如下:一、please 请:烦请该词在句中的位置比较灵活,既可以出现在句首,也可以出现在句中和句...当代英语中表示“请”含义的最常用的有三个词,即 please,kindly 和 just。这几个词看似简单,但在实际使用中比我们想象的要复杂得多。现辨析如下:一、please 请:烦请该词在句中的位置比较灵活,既可以出现在句首,也可以出现在句中和句末。如:(1)Please give me that book.请把那本书给我。(2)Give me that book,please.请把那本书给我。(3)Will you please give me that book?请把那本书给我,好吗?(4)Will you give me that book,please?展开更多
反身代词(reflexive pronoun)在英语中只有9个,其单数形式为:myself,yourself,himself,herself,itself,oneself;其复数形式为:ourselves,yourselves,themselves。这些词的用法值得认真掌握,不可忽视。本文详细谈谈反身代词在句中的作用...反身代词(reflexive pronoun)在英语中只有9个,其单数形式为:myself,yourself,himself,herself,itself,oneself;其复数形式为:ourselves,yourselves,themselves。这些词的用法值得认真掌握,不可忽视。本文详细谈谈反身代词在句中的作用。一、反射作用在句中作宾语或表语,表示动作返回到动作执行者本身。1.作动词的宾语(1)Please help yourself to some fish.请随便吃点鱼吧。展开更多
TiO2 nanoparticles with surface hydroxyl groups are treated by trimethoxysilane (CH3O)3Si(CH2)3O(CH2CH2O)6-9CH3 and a inorganic core/organic shell hybridmaterials, which shows itself a yellow viscous fluid, is obtaine...TiO2 nanoparticles with surface hydroxyl groups are treated by trimethoxysilane (CH3O)3Si(CH2)3O(CH2CH2O)6-9CH3 and a inorganic core/organic shell hybridmaterials, which shows itself a yellow viscous fluid, is obtained. We call it solvent-free TiO2 nanofliuds. Transmission electron microscopy (TEM), Fourier transform infrared spectrum (FTIR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and rheometer are adopted to characterize the product. As a result, the content of TiO2 nanoparticles in the nanofliuds is about 5.5wt%, the functionalized TiO2 nanoparticles possess better dispersion, very low viscosity and an obvious liquid-like behavior at room temperature in absence of solvent.展开更多
As competition in the market for discrete part prod uc ts gets harder and harder the requirements for extreme manufacturing operati on efficiencies get increasingly accentuated. Therefore requirements for well behaved...As competition in the market for discrete part prod uc ts gets harder and harder the requirements for extreme manufacturing operati on efficiencies get increasingly accentuated. Therefore requirements for well behaved manufacturing operation control get more and more significant. The purpose of the paper is to establish a framework for development of formal m ethods for design of systems for simultaneous control of continuous manufacturin g task processes and resource allocation of discrete part manufacturing. In the paper states which are needed for feedback control of continuous manufact uring task processes are defined and an example is presented. States which are necessary for feedback control of distribution of manufacturing resources are defined. The definition is based on the states defined for feedba ck control of the continuous processes of discrete part manufacturing tasks. An exemple is presented. Based on use of the state variables two types of equations are described, the pu rpose of which it is to represent the constraints to which control of the manufa cturing system is subject. Characteristic instances of the equations are presen ted. Methods for design of systems which can control continuous tasks are presented. Methods for design of systems which can control resource allocation are presente d. Methods for design of systems which can simultaneously control continuous tas k processes and resource allocation as the resource allocation is subject to con tinuos task execution constraints are presented.展开更多
In a normal form, prisoners' dilemma (PD) is represented by a payoff matrix showing players' strategies and payoffs. To obtain the distinguishing trait and strategic form of PD, certain constraints are imposed...In a normal form, prisoners' dilemma (PD) is represented by a payoff matrix showing players' strategies and payoffs. To obtain the distinguishing trait and strategic form of PD, certain constraints are imposed on the elements of its payoff matrix. We quantize PD by a generalized quantization scheme to analyze its strategic behavior in the quantum domain. The game starts with a general entangled state of the form |ψ>=cos(ξ/2)|00>+sin(ξ/2)|11> and the measurement for payoffs is performed in entangled and product bases. We show that for both measurements, there exist respective cutoff values of entanglement of the initial quantum state up to which the strategic form of the game remains intact. Beyond these cutoffs the quantized PD behaves like the chicken game (CG) up to another cutoff value. For the measurement in the entangled basis the dilemma is resolved for sinξ >1/7 with Q⊗Q as a Nash Equilibrium (NE). However, the quantized game behaves like PD when sinξ >1/3;whereas in the range 1/7<sinξ <1/3 it behaves like CG with Q⊗Q as an NE. For the measurement in the product basis the quantized PD behaves like classical PD for sin^(2)(ξ/2) <1/3 with D⊗D as an NE. In region 1/3<sin^(2)(ξ/2)<3/7, the quantized PD behaves like classical CG with C⊗D and D⊗C as NEs.展开更多
We have developed a nev self-assembled quantum dot system where InGaAs dots are formed on an InAlAs wetting layer and embedded in the GaAs matrix. The structure is realized by special sample designation and demonstrat...We have developed a nev self-assembled quantum dot system where InGaAs dots are formed on an InAlAs wetting layer and embedded in the GaAs matrix. The structure is realized by special sample designation and demonstrated by low-temperature photoluminescence measurements. In contrast to the traditional InAs/GaAs quantum dots dominated by the ensemble effect, the temperature dependence of the photoluminescence of such a quantum dot structure behaves as decoupled quantum dots. This can be attributed to the enhanced potential confinement for the dots provided by a higher-energy barrier in the wetting layer。展开更多
OBJECTIVEα-Dstroglycan(α-DG)is a predominant component in the dystrophin-glycoprotein complex(DGC)and a recently char⁃acterized receptor for several extracellular matrix components with high affinity.Recent research...OBJECTIVEα-Dstroglycan(α-DG)is a predominant component in the dystrophin-glycoprotein complex(DGC)and a recently char⁃acterized receptor for several extracellular matrix components with high affinity.Recent research⁃es have reported that hypoglycosylation ofα-DG is associated with the pathophysiology of diseas⁃es,especially muscular dystrophy,but little is known about major depressive disorder(MDD).Like-acetylglucosaminyl transferase(Large)is a key enzyme for glycosylation ofα-DG,which mainly modifies two points in the middle domain ofα-DG:Thr-317 and Thr-319.Glycosylatedα-DG(GLY-α-DG)can bind with high affinity to extracellular matrix(ECM)molecules that con⁃tain laminin globular(LG)domains,including per⁃lecan,agrin and neurexin.Agrin is mainly derived from neurons rather than glial cells.In cultured hippocampal neurons,it was found that agrin could regulate the homeostatic plasticity of inhibi⁃tory neurons by acting on GLY-α-DG.Mdx mice are transgenetic models for the investigation of Duchenne muscular dystrophy.Many studies have shown that the expression of GLY-α-DG in the peripheral and brain tissues of Mdx mice is significantly down-regulated.Mdx mice show cognitive impairment and high levels of anxiety.In this study,we employed chronic social defeat stress(CSDS)to establish an animal model of depression and detected the expression of GLY-α-DG among the brain areas associated with the pathophysiology of depression.METHODS So⁃cial interaction test(SIT)and sucrose preference test(SPT)were used to evaluate depressive-like behavior.Open field(OF)and elevated plus maze(EPM)test were used to determine the anxiety-like behavior of Mdx mice.Novelty-sup⁃pressed feeding test(NSFT)forced swim test(FST)and tail suspension test(TST)were used to detect the depressive-like behavior of Mdx mice.Novel object recognition test(NOR)was applied to evaluate the cognition of Mdx mice.Subthreshold social defeat stress was used to explore the susceptibility to stress in Mdx mice.Stereotactic infusion of agrin into the ventral hippocampus(vHip),FST and TST were used to investigate the antidepressant effects of agrin.Adeno-associated virus(AAV)-mediated overex⁃pression techniques,behavior tests and whole-cell path-clamp technique were conducted to determine the impact of Large overexpression on CSDS susceptible mice.RESULTS The expres⁃sion ofα-DG and GLY-α-DG were significantly decreased in the vHip of CSDS susceptible mice.Mdx mice showed decreased expression of GLY-α-DG and increased anxiety-like behav⁃iors.Mdx mice displayed some depressive-like behaviors,and the susceptibility to stress was significantly increased.Downregulation of the expressionα-DG in the vHip by lentivirus increased the susceptibility to stress.Administra⁃tion of agrin to CSDS susceptible mice exerted antidepressant effects,and this effect could par⁃tially sustain for a week.The expression of Large was decreased in vHip.Overexpression of Large through AAV-Large reversed the depressive-like behaviors and restored the decreased frequency and amplitude of mIPSC.CONCLUSION GLY-α-DG and its glycosylase are significantly decreased in CSDS susceptible mice.Adminis⁃tration of agrin and overexpression of Large displays antidepressant effect,which may be related to its promotion of inhibitory synaptic transmission.展开更多
It is the ninth year for China to implement the Antitrust Law and the law enforcement has been seeing plenty of new measures,which helps the Law keep improving.Since the year of 2014,the antitrust law enforcement divi...It is the ninth year for China to implement the Antitrust Law and the law enforcement has been seeing plenty of new measures,which helps the Law keep improving.Since the year of 2014,the antitrust law enforcement division of the State Council has disclosed a series of sensational antitrust investigation cases and the foreign-invested companies serve as a target among these cases.For instance,the"展开更多
1、accurate,exact,precise,correct,right 与 true①accurate 指相当程度地符合客观标准并强调需用极大努力以求达到符合客观标准或事实。如:You must be accurate in arithmatic.(你做算术要准确。)She is a very accurate typist.(...1、accurate,exact,precise,correct,right 与 true①accurate 指相当程度地符合客观标准并强调需用极大努力以求达到符合客观标准或事实。如:You must be accurate in arithmatic.(你做算术要准确。)She is a very accurate typist.(她是个丝毫不爽的打字员)展开更多
In our earlier paper,power system stabilizers (PSSs) are designed for a nine-machine system,a new pole-placement tech-nique is developed for the design,and participation factors are used to decide how many stabilizers...In our earlier paper,power system stabilizers (PSSs) are designed for a nine-machine system,a new pole-placement tech-nique is developed for the design,and participation factors are used to decide how many stabilizers are required and where they shall be.Eachmachine being represented by a low-order linear model,there is some reservation of the results.In this paper,extensive transient simulationsare performed and each machine is represented by a high-order nonlinear model.Coherent groups are found.A weighted speed deviationindex (SDI) is defined to find out the most unstable machines in the system.PSSs are designed after the decisions of PSS number and sites.Transient simulations are carried out again for the closed-loop system.A system stability index (SSI) is used to evaluate the stability of theclosed-loop system.It is found that three PSSs are sufficient to ensure the stability of the nine-machine system.展开更多
Directions:There are 15 incomplete sentences in this part.Foreach sentence there are four choices marked A,B,C and D.Choose the ONE answer that best completes the sentence.1.He always does something that can __ the su...Directions:There are 15 incomplete sentences in this part.Foreach sentence there are four choices marked A,B,C and D.Choose the ONE answer that best completes the sentence.1.He always does something that can __ the sufferings ofothers.A.release B.relieve C.retain D.展开更多
无论在汉语或英语中,“最好……”,“还是……的好”这一词语应用颇为广泛,英语表达方式多种多样,初学英语者易望文生义,误将“最好……”译成副词或形容词的最高级,实际上“最好”常以比较级形式出现。一、几种表达这一结构的常用句式...无论在汉语或英语中,“最好……”,“还是……的好”这一词语应用颇为广泛,英语表达方式多种多样,初学英语者易望文生义,误将“最好……”译成副词或形容词的最高级,实际上“最好”常以比较级形式出现。一、几种表达这一结构的常用句式。 1.had/would/might better+v.结构。如: You had/would better go over the circuit once more. 你最好把线路再检查一遍。 You might better take your tools in case some ma—chines require repairing. 你最好带走你的工具,以便有些机器需要修理时好用。展开更多
在人们的日常生活或非正式的书面语言中常用省略式’ll来表示will和shall.如果’ll表示的是一般将来时,那么无论用will还是用shall来代替’ll都是可以接受的;如果不是在上述情况下我们认为在一般的口语表达中’ll只表示will,而井不是sh...在人们的日常生活或非正式的书面语言中常用省略式’ll来表示will和shall.如果’ll表示的是一般将来时,那么无论用will还是用shall来代替’ll都是可以接受的;如果不是在上述情况下我们认为在一般的口语表达中’ll只表示will,而井不是shall的省略式.这里仅讨论I’ll和we’ll的情况。请看下面的例句: 1.(Will you help me lift this box?)—Of course I’ll help you. 2.She is ready to tell us another story if we’ll behave well.在例1中.我们可以把后面的答语简略为“Of course I will.”,这里will表示情愿、愿意(willingness),而shall并不能表示这种含义。展开更多
文摘In order to build a healthy and civilized city,we students should try our best to behave well in many ways.First of all,we must respect old people and polite1 to others.Second,we should make our city clean every day.Don’t throw litter here and there.Third,it’s polite to say'Thank you','Please'and so on.We should never speak2 dirty words.Be friendly to others and always be ready to help others.
文摘当代英语中表示“请”含义的最常用的有三个词,即 please,kindly 和 just。这几个词看似简单,但在实际使用中比我们想象的要复杂得多。现辨析如下:一、please 请:烦请该词在句中的位置比较灵活,既可以出现在句首,也可以出现在句中和句末。如:(1)Please give me that book.请把那本书给我。(2)Give me that book,please.请把那本书给我。(3)Will you please give me that book?请把那本书给我,好吗?(4)Will you give me that book,please?
文摘反身代词(reflexive pronoun)在英语中只有9个,其单数形式为:myself,yourself,himself,herself,itself,oneself;其复数形式为:ourselves,yourselves,themselves。这些词的用法值得认真掌握,不可忽视。本文详细谈谈反身代词在句中的作用。一、反射作用在句中作宾语或表语,表示动作返回到动作执行者本身。1.作动词的宾语(1)Please help yourself to some fish.请随便吃点鱼吧。
文摘TiO2 nanoparticles with surface hydroxyl groups are treated by trimethoxysilane (CH3O)3Si(CH2)3O(CH2CH2O)6-9CH3 and a inorganic core/organic shell hybridmaterials, which shows itself a yellow viscous fluid, is obtained. We call it solvent-free TiO2 nanofliuds. Transmission electron microscopy (TEM), Fourier transform infrared spectrum (FTIR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and rheometer are adopted to characterize the product. As a result, the content of TiO2 nanoparticles in the nanofliuds is about 5.5wt%, the functionalized TiO2 nanoparticles possess better dispersion, very low viscosity and an obvious liquid-like behavior at room temperature in absence of solvent.
文摘As competition in the market for discrete part prod uc ts gets harder and harder the requirements for extreme manufacturing operati on efficiencies get increasingly accentuated. Therefore requirements for well behaved manufacturing operation control get more and more significant. The purpose of the paper is to establish a framework for development of formal m ethods for design of systems for simultaneous control of continuous manufacturin g task processes and resource allocation of discrete part manufacturing. In the paper states which are needed for feedback control of continuous manufact uring task processes are defined and an example is presented. States which are necessary for feedback control of distribution of manufacturing resources are defined. The definition is based on the states defined for feedba ck control of the continuous processes of discrete part manufacturing tasks. An exemple is presented. Based on use of the state variables two types of equations are described, the pu rpose of which it is to represent the constraints to which control of the manufa cturing system is subject. Characteristic instances of the equations are presen ted. Methods for design of systems which can control continuous tasks are presented. Methods for design of systems which can control resource allocation are presente d. Methods for design of systems which can simultaneously control continuous tas k processes and resource allocation as the resource allocation is subject to con tinuos task execution constraints are presented.
文摘In a normal form, prisoners' dilemma (PD) is represented by a payoff matrix showing players' strategies and payoffs. To obtain the distinguishing trait and strategic form of PD, certain constraints are imposed on the elements of its payoff matrix. We quantize PD by a generalized quantization scheme to analyze its strategic behavior in the quantum domain. The game starts with a general entangled state of the form |ψ>=cos(ξ/2)|00>+sin(ξ/2)|11> and the measurement for payoffs is performed in entangled and product bases. We show that for both measurements, there exist respective cutoff values of entanglement of the initial quantum state up to which the strategic form of the game remains intact. Beyond these cutoffs the quantized PD behaves like the chicken game (CG) up to another cutoff value. For the measurement in the entangled basis the dilemma is resolved for sinξ >1/7 with Q⊗Q as a Nash Equilibrium (NE). However, the quantized game behaves like PD when sinξ >1/3;whereas in the range 1/7<sinξ <1/3 it behaves like CG with Q⊗Q as an NE. For the measurement in the product basis the quantized PD behaves like classical PD for sin^(2)(ξ/2) <1/3 with D⊗D as an NE. In region 1/3<sin^(2)(ξ/2)<3/7, the quantized PD behaves like classical CG with C⊗D and D⊗C as NEs.
基金Supported by the National Natural Science Foundation of China under Grant No.69736010the National Advanced Materials Committee of China。
文摘We have developed a nev self-assembled quantum dot system where InGaAs dots are formed on an InAlAs wetting layer and embedded in the GaAs matrix. The structure is realized by special sample designation and demonstrated by low-temperature photoluminescence measurements. In contrast to the traditional InAs/GaAs quantum dots dominated by the ensemble effect, the temperature dependence of the photoluminescence of such a quantum dot structure behaves as decoupled quantum dots. This can be attributed to the enhanced potential confinement for the dots provided by a higher-energy barrier in the wetting layer。
文摘OBJECTIVEα-Dstroglycan(α-DG)is a predominant component in the dystrophin-glycoprotein complex(DGC)and a recently char⁃acterized receptor for several extracellular matrix components with high affinity.Recent research⁃es have reported that hypoglycosylation ofα-DG is associated with the pathophysiology of diseas⁃es,especially muscular dystrophy,but little is known about major depressive disorder(MDD).Like-acetylglucosaminyl transferase(Large)is a key enzyme for glycosylation ofα-DG,which mainly modifies two points in the middle domain ofα-DG:Thr-317 and Thr-319.Glycosylatedα-DG(GLY-α-DG)can bind with high affinity to extracellular matrix(ECM)molecules that con⁃tain laminin globular(LG)domains,including per⁃lecan,agrin and neurexin.Agrin is mainly derived from neurons rather than glial cells.In cultured hippocampal neurons,it was found that agrin could regulate the homeostatic plasticity of inhibi⁃tory neurons by acting on GLY-α-DG.Mdx mice are transgenetic models for the investigation of Duchenne muscular dystrophy.Many studies have shown that the expression of GLY-α-DG in the peripheral and brain tissues of Mdx mice is significantly down-regulated.Mdx mice show cognitive impairment and high levels of anxiety.In this study,we employed chronic social defeat stress(CSDS)to establish an animal model of depression and detected the expression of GLY-α-DG among the brain areas associated with the pathophysiology of depression.METHODS So⁃cial interaction test(SIT)and sucrose preference test(SPT)were used to evaluate depressive-like behavior.Open field(OF)and elevated plus maze(EPM)test were used to determine the anxiety-like behavior of Mdx mice.Novelty-sup⁃pressed feeding test(NSFT)forced swim test(FST)and tail suspension test(TST)were used to detect the depressive-like behavior of Mdx mice.Novel object recognition test(NOR)was applied to evaluate the cognition of Mdx mice.Subthreshold social defeat stress was used to explore the susceptibility to stress in Mdx mice.Stereotactic infusion of agrin into the ventral hippocampus(vHip),FST and TST were used to investigate the antidepressant effects of agrin.Adeno-associated virus(AAV)-mediated overex⁃pression techniques,behavior tests and whole-cell path-clamp technique were conducted to determine the impact of Large overexpression on CSDS susceptible mice.RESULTS The expres⁃sion ofα-DG and GLY-α-DG were significantly decreased in the vHip of CSDS susceptible mice.Mdx mice showed decreased expression of GLY-α-DG and increased anxiety-like behav⁃iors.Mdx mice displayed some depressive-like behaviors,and the susceptibility to stress was significantly increased.Downregulation of the expressionα-DG in the vHip by lentivirus increased the susceptibility to stress.Administra⁃tion of agrin to CSDS susceptible mice exerted antidepressant effects,and this effect could par⁃tially sustain for a week.The expression of Large was decreased in vHip.Overexpression of Large through AAV-Large reversed the depressive-like behaviors and restored the decreased frequency and amplitude of mIPSC.CONCLUSION GLY-α-DG and its glycosylase are significantly decreased in CSDS susceptible mice.Adminis⁃tration of agrin and overexpression of Large displays antidepressant effect,which may be related to its promotion of inhibitory synaptic transmission.
文摘It is the ninth year for China to implement the Antitrust Law and the law enforcement has been seeing plenty of new measures,which helps the Law keep improving.Since the year of 2014,the antitrust law enforcement division of the State Council has disclosed a series of sensational antitrust investigation cases and the foreign-invested companies serve as a target among these cases.For instance,the"
文摘1、accurate,exact,precise,correct,right 与 true①accurate 指相当程度地符合客观标准并强调需用极大努力以求达到符合客观标准或事实。如:You must be accurate in arithmatic.(你做算术要准确。)She is a very accurate typist.(她是个丝毫不爽的打字员)
文摘In our earlier paper,power system stabilizers (PSSs) are designed for a nine-machine system,a new pole-placement tech-nique is developed for the design,and participation factors are used to decide how many stabilizers are required and where they shall be.Eachmachine being represented by a low-order linear model,there is some reservation of the results.In this paper,extensive transient simulationsare performed and each machine is represented by a high-order nonlinear model.Coherent groups are found.A weighted speed deviationindex (SDI) is defined to find out the most unstable machines in the system.PSSs are designed after the decisions of PSS number and sites.Transient simulations are carried out again for the closed-loop system.A system stability index (SSI) is used to evaluate the stability of theclosed-loop system.It is found that three PSSs are sufficient to ensure the stability of the nine-machine system.
文摘Directions:There are 15 incomplete sentences in this part.Foreach sentence there are four choices marked A,B,C and D.Choose the ONE answer that best completes the sentence.1.He always does something that can __ the sufferings ofothers.A.release B.relieve C.retain D.
文摘无论在汉语或英语中,“最好……”,“还是……的好”这一词语应用颇为广泛,英语表达方式多种多样,初学英语者易望文生义,误将“最好……”译成副词或形容词的最高级,实际上“最好”常以比较级形式出现。一、几种表达这一结构的常用句式。 1.had/would/might better+v.结构。如: You had/would better go over the circuit once more. 你最好把线路再检查一遍。 You might better take your tools in case some ma—chines require repairing. 你最好带走你的工具,以便有些机器需要修理时好用。
文摘在人们的日常生活或非正式的书面语言中常用省略式’ll来表示will和shall.如果’ll表示的是一般将来时,那么无论用will还是用shall来代替’ll都是可以接受的;如果不是在上述情况下我们认为在一般的口语表达中’ll只表示will,而井不是shall的省略式.这里仅讨论I’ll和we’ll的情况。请看下面的例句: 1.(Will you help me lift this box?)—Of course I’ll help you. 2.She is ready to tell us another story if we’ll behave well.在例1中.我们可以把后面的答语简略为“Of course I will.”,这里will表示情愿、愿意(willingness),而shall并不能表示这种含义。
