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Separation mechanism of dissolution-diffusion of g...

Separation mechanism of dissolution-diffusion of gas through non-porous membrane, i.e., dense membrane (such as polymer membrane). At this time, the process of gas passing through the membrane can be considered to be composed of three steps.(1) adsorption process, that is, the gas on the upstream surface of the film is adsorbed, condensed, dissolved.This process is somewhat selective.(2) diffusion process, that is, the adsorbed gas in the membrane on both sides of the pressure difference, concentration difference, according to the different diffusion coefficient diffusion through the other side of the membrane.(3) desorption process, that has been diffused through the gas in the film downstream surface desorption, stripping process.

提问人：网友hefeng10084 发布时间：2022-01-07

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更多“Separation mechanism of dissol…”相关的问题

第1题

翻译 mechanism of separation of power

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第2题

2. Fill in the blanks with the appropriate words（...

2. Fill in the blanks with the appropriate words（每小题2分，共40分） (1) A 1) is characterized by having a well-structured periodic placement of atoms. The smallest assembly of atoms that can be repeated to form the entire crystal is called a 2) , with a dimension of 3) . (2) For any semiconductor there is a forbidden energy range in which allowed states cannot exist. Energy regions or energy bands are permitted above and below this energy gap. The upper bands are called the 4) ; the lower bands, the 5) . The separation between the energy of the lowest conduction band and that of the highest valence band is called the 6) or energy gap Eg, which is one of the most-important parameters in semiconductor physics. (3) For an n-type silicon, a substitutional phosphorous atom with five valence electrons has replaced a silicon atom and a negative-charged electron is donated to the lattice in the conduction band. The phosphorous atom is called a 7) . When a boron atom with three valence electrons substitutes for a silicon atom, a positive-charged hole is created in the valence band and an additional electron will be accepted to form four covalent bonds around the boron. This is p-type, and the boron is an 8) . We can calculate the approximate distance of the donor electron from the donor impurity ion, and also the approximate energy required to elevate the donor electron into the conduction band. This energy is referred to as the 9) . (4) Electronic devices rely on transport of electrons (holes) in materials. This transport occurs either under the influence of an electric 10) or carrier concentration 11) . There are two collision or scattering mechanisms that dominate in a semiconductor and affect the carrier 12) : phonon or 13) scattering, and 14) scattering. If the carrier energy is large enough it can transfer energy to the lattice by the emission of an optical phonon. This mechanism is very efficient and limits the maximum drift velocity. The limiting value for the drift velocity is termed the 15) . Besides the 16) , which flows when an electric field is applied and which follows Ohm's law, an additional important component of current can flow if a spatial variation of carrier energies or densities exists within the material. This component of current is called 17) . (5) The bipolar transistor has three separately doped regions and two pn 18) . The three terminal connections are called the emitter, base, and 19) . The width of the 20) region is small compared to the minority carrier diffusion length.

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第3题

The Greek's lofty attitude toward scientific research—and the scientists' contempt of util

ity—was a long time dying. For a millennium after Archimedes, this separation of mechanics from geometry inhibited fundamental technological progress and in some areas repressed it altogether. But there was a still greater obstacle to change until the very end of the middle ages: the organization of society. The social system of fixed class relationships that prevailed through the Middle Ages (and in some areas much longer) itself hampered improvement. Under this system, the laboring masses, in exchange for the bare necessities of life, did all the productive work, while the privileged few—priests, nobles, and kings—concerned themselves only with ownership and maintenance of their own position. In the interest of their privileges they did achieve considerable progress in defense, in warmaking, in government, in trader in the arts of leisure, and in the extraction of labor from their dependents, but they had no familiarity with the process of production. On the other hand, the laborers, who were familiar with manufacturing techniques, had no incentive to improve or increase production to the advantage of their masters. Thus, with one class possessing the requisite knowledge and experience, but lacking incentive and leisure, and the other class lacking the knowledge and experience, there was no means by which technical progress could be achieved.

The whole ancient world was built upon this relationship—a relationship as sterile as it was inhuman. The availability of slaves nullified the need for more efficient machinery. In many of the conmonplace fields of human endeavor, actual stagnation prevailed for thousands of years. Not all the glory that was Greece and the grandeur that was Rome could develop the windmill or contrive so simple an instrument as the wheelbarrow—products of the tenth and thirteenth centuries respectively.

For about twenty-five centuries, two-thirds of the power of the horse was lost because he wasn't shod, and much of the strength of the ox was wasted because his harness wasn't modified to fit his shoulders. For more than five thousand years, sailors were confined to rivers and coasts by a primitive steering mechanism which required remarkably little alteration (in the thirteenth century) to become a rudder.

With any ingenuity at all, the ancient plough could have been put on wheels and the ploughshare shaped to bite and turn the sod instead of merely scratching it—but the ingenuity wasn't forthcoming. And the villager of the Middle Ages, like the men who first had fire, had a smoke hole in the center of the straw and reed thatched roof of his one-room dwelling (which he shared with his animals), while the medieval charcoal burner (like his Stone Age ancestor) made himself a hut of small branches.

Lack of technological progress in the ancient and medieval worlds was primarily due to the absence of ______.

A．natural resources

B．inventive ability

C．people's desire for the "better things of life"

D．proper social organization

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第4题

The Greek's lofty attitude toward scientific research——and the scientists' contempt of uti

lity was a long time dying. For a millennium after Archimedes, this separation of mechanics from geometry inhibited fundamental technological progress and in some areas repressed it altogether. But there was a still greater obstacle to change until the very end of the middle ages: the organization of society. The social system of fixed class relationships that prevailed through the Middle Ages (and in some areas much longer) itself hampered improvement. Under this system, the laboring masses, in exchange for the bare necessities of life, did all the productive work, while the privileged few——priests, nobles, and kings——concerned themselves only with ownership and maintenance of their own position. In the interest of their privileges they did achieve considerable progress in defense, in warmaking, in government, in trade, in the arts of leisure, and in the extraction of labor from their dependents, but they had no familiarity with the process of production. On the other hand, the laborers, who were familiar with manufacturing techniques, had no incentive to improve or increase production to the advantage of their masters. Thus, with one class possessing the requisite knowledge and experience, but lacking incentive and leisure, and the other class lacking the knowledge and experience, there was no means by which technical progress could be achieved.

The whole ancient world was built upon this relationship——a relationship as sterile as it was inhuman. The availability of slaves nullified the need for more efficient machinery. In many of the coxnmonplace fields of human endeavor, actual stagnation prevailed for thousands of years. Not all the glory that was Greece and the grandeur that was Rome could develop the windmill or contrive so simple an instrument as the wheelbarrow——products of the tenth and thirteenth centuries respectively.

For about twenty-five centuries, two-thirds of the power of the horse was lost because he wasn't shod, and much of the strength of the ox was wasted because his harness wasn't modified to fit his shoulders. For more than five thousand years, sailors were confined to rivers and coasts by a primitive steering mechanism which required remarkably little alteration (in the thirteenth century) to become a rudder.

With any ingenuity at all, the ancient plough could have been put on wheels and the ploughshare shaped to bite and turn the sod instead of merely scratching it——but the ingenuity wasn't forthcoming. And the villager of the Middle Ages, like the men who first had fire, had a smoke hole in the center of the straw and reed thatched roof of his' one-room dwelling (which he shared with his animals), while the medieval charcoal burner (like his Stone Age ancestor) made himself a hut of small branches.

Lack of technological progress in the ancient and medieval worlds was primarily due to the absence of ______.

A．natural resources

B．inventive ability

C．people's desire for the "better things of life"

D．proper social organization

点击查看答案

第5题

The Greek's lofty attitude toward scientific research--and the scientists' contempt of uti

lity-was not a long time dying. For a millennium after Archimedes, this separation of mechanics from geometry prevented fundamental technological progress and in some areas restrained it altogether. But there was a still greater obstacle to change until the very end of the Middle Ages-the organization of society.

The social system of fixed class relationships that prevailed through the Middle Ages itself made improvement impossible. Under this system, the labouring masses, in exchange for the bare necessities of life, did all the productive work, while the privileged few--priests, nobles, and kings--concerned themselves only with ownership and maintenance of their own position. In the interest of their prerogatives they did achieve considerable progress in defence, in war making, in government, in trade, and in the arts of leisure, but they had no familiarity with the processes of production. On the other hand, the labourers, who were familiar with manufacturing techniques, had no incentive to improve or increase production to the advantage of their masters. Thus, with one class possessing the requisite knowledge and experience, but lacking incentive and leisure, and the other class lacking the knowledge and experience, there was no means by which technical progress could be achieved.

The whole ancient world was built upon this relationship--a relationship as sterile as it was inhuman. The availability of slaves made efficient machinery needless. In many of the commonplace fields of human endeavour, actual stagnation prevailed for thousands of years.

For about twenty-five centuries, two thirds of the power of the horse was lost because he wasn't shod, and much of the strength of the ox was wasted because his harness wasn't modified to fit his shoulders. For more than five thousand years, sailors were confined to rivers and coasts by a primitive steering mechanism which required remarkable little alteration (in the thirteenth century) to become a rudder(舵).

With any originality at all, the ancient plough could have been put on wheels and the ploughshare shaped to bite and turn the sod instead of merely scratching it--but the originality wasn't forthcoming. And the villager of the Middle Ages, like the men who first had fire, had a smoke hole in the center of the straw and reed roof of his one room dwelling, while the medieval charcoal burner(like his Stone Age ancestor) make himself a hut of small branches.

According to the passage, lack of technological progress in the ancient and medieval worlds was primarily due to the absence of______.

A．natural resources.

B．inventive ability.

C．people's desire for the" better things of life".

D．proper social organization.

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第6题

电气分隔（electrical separation）

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第7题

Principle of absorption separation: the process of absorption separation is the direct con

tact between oil and gas and the absorbent. Due to the different solubility of each component in the absorber, the soluble component and the insoluble component are separated.

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第8题

A traffic separation zone is that part of a traffic separation scheme which ______.A.is lo

A traffic separation zone is that part of a traffic separation scheme which ______.

A.is located between the scheme and the nearest land

B.separates traffic proceeding in one direction from traffic proceeding in the opposite direction

C.is designated as an anchorage area

D.contains all the traffic moving in the same direction

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第9题

Children with separation anxiety may prefer to stay with their classmates at school.A．YB．N

Children with separation anxiety may prefer to stay with their classmates at school.

A．Y

B．N

C．NG

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第10题

Separation means that the juice product is stable.（）

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