摘要:
In a semiconductor memory comprising one main bit line D1, a pair of main ground lines VG1 and VD2, a plurality of memory cell banks to be selectively connected to the main bit line D1 and the main ground lines VG1 and VD2, and a plurality of word lines W1 to Wn extending through the memory cell banks, each of the memory cell banks includes a plurality of wirings L1, L2, L3, L4 and L5 located in parallel to each other, and a threshold of a block selection transistor BT11 connected between the main bit line D1 and the wiring L3, is lower than that of block selection transistors BT12 and BT13 connected between the main bit line D1 and the wiring L2 and between the main bit line D1 and the wiring L4, respectively.
摘要:
When a data bit is read out from a semiconductor read only memory device, a current-mirror type sense amplifier is electrically connected through a bit line, a first selector, a selected memory cell and a second selector to a discharging line so as to check a potential drop on the bit line, and each of the first and second selectors selectively connects the bit line or the discharging line to eight columns of memory cells by increasing the component switching transistors thereof so as to space the bit line from the discharging line, thereby increasing a margin for a bit line contact.
摘要:
A nanobubble-containing liquid producing apparatus includes: a microbubble generating device that prepares a microbubble-containing liquid with use of a liquid introduced into a microbubble generation tank and discharges the microbubble-containing liquid into the microbubble generation tank; a micro-nanobubble generating device that prepares a micro-nanobubble-containing liquid with use of the microbubble-containing liquid introduced into a micro-nanobubble generation tank and discharges the micro-nanobubble-containing liquid into the micro-nanobubble generation tank; and a nanobubble generating device that prepares a nanobubble-containing liquid with use of the micro-nanobubble-containing liquid introduced into a nanobubble generation tank and discharges the nanobubble-containing liquid into the nanobubble generation tank. Therefore, an apparatus for producing a nanobubble-containing liquid with use of general-purpose products can be manufactured at low cost and in a short period of time.
摘要:
Drainage water containing an organofluorine compound is introduced into a raw tank (1) and then filtered through a filtration device (4). Next, a microorganism, a micro-nanobubbling auxiliary agent and a nutrient are added thereto in a first transit tank (5) while micro-nanobubbles are generated thereinto by a micro-nanobubbling machine (7), thereby giving treated water. This treated water is then fed into an active carbon column (14) and then the above-described organofluorine compound contained in the treated water is decomposed by the microorganism as described above.
摘要:
A first treatment tank (1) to a fourth treatment tank are installed prior to ultrapure water production apparatus (5), dilute wastewater recovering apparatus (34), general service water recovering apparatus and wastewater treatment apparatus. The treatment tanks (1, 2, . . . ) each have a micro-nano bubble generation tank (6, 23, . . . ) and an anaerobic measuring tank (7, 24, . . . ). Accordingly, microbes within the respective anaerobic measuring tanks (7, 24, . . . ) are activated by micro-nano bubbles generated in each micro-nano bubble generation tank (6, 23, . . . ) to thereby enhance the treatment efficiency of low-concentration organic matter. Further, when the value measured by dissolved oxygen meter (13, 30, . . . ) or oxidation-reduction potentiometer (14, 31, . . . ) of each anaerobic measuring tank (7, 24, . . . ) exceeds an individually determined given range, the rotational speed of a circulating pump (9, 26, . . . ) is controlled to thereby decrease the generation of micro-nano bubbles. Thus, the micro-nano bubble content in water undergoing treatment is held appropriate.
摘要:
A nanobubble-containing liquid producing apparatus includes: a microbubble generating device that prepares a microbubble-containing liquid with use of a liquid introduced into a microbubble generation tank and discharges the microbubble-containing liquid into the microbubble generation tank; a micro-nanobubble generating device that prepares a micro-nanobubble-containing liquid with use of the microbubble-containing liquid introduced into a micro-nanobubble generation tank and discharges the micro-nanobubble-containing liquid into the micro-nanobubble generation tank; and a nanobubble generating device that prepares a nanobubble-containing liquid with use of the micro-nanobubble-containing liquid introduced into a nanobubble generation tank and discharges the nanobubble-containing liquid into the nanobubble generation tank. Therefore, an apparatus for producing a nanobubble-containing liquid with use of general-purpose products can be manufactured at low cost and in a short period of time.
摘要:
The application device for liquid containing micro-nano bubbles generates micro-nano bubbles in a wide size distribution with use of a submerged pump-type micro-nano bubble generator and a spiral flow-type micro-nano bubble generator. A micro-nano bubble generating aid metering pump is controlled by a bubble level meter and a level controller, so that the supply amount of a micro-nano bubble generating aid is controlled in response to the level of bubbles from a fluid level. The supply amount of a micro-nano bubble generating aid is also controlled by a turbidimeter and a controller in response to the turbidity of the liquid in a micro-nano bubble generation tank, while the amount of air supplied to the submerged pump-type micro-nano bubble generator is controlled in response to the turbidity of the liquid. Therefore, the device can produce a large amount of various micro-nano bubbles in a wide size distribution more economically.
摘要:
A first treatment tank (1) to a fourth treatment tank are installed prior to ultrapure water production apparatus (5), dilute wastewater recovering apparatus (34), general service water recovering apparatus and wastewater treatment apparatus. The treatment tanks (1, 2, . . . ) each have a micro-nano bubble generation tank (6, 23, . . . ) and an anaerobic measuring tank (7, 24, . . . ). Accordingly, microbes within the respective anaerobic measuring tanks (7, 24, . . . ) are activated by micro-nano bubbles generated in each micro-nano bubble generation tank (6, 23, . . . ) to thereby enhance the treatment efficiency of low-concentration organic matter. Further, when the value measured by dissolved oxygen meter (13, 30, . . . ) or oxidation-reduction potentiometer (14, 31, . . . ) of each anaerobic measuring tank (7, 24, . . . ) exceeds an individually determined given range, the rotational speed of a circulating pump (9, 26, . . . ) is controlled to thereby decrease the generation of micro-nano bubbles. Thus, the micro-nano bubble content in water undergoing treatment is held appropriate.
摘要:
In wastewater treatment equipment, a surfactant is added to a micronanobubble reaction vessel 3 by using a surfactant pump 8 and a surfactant tank 9 which constitute a surfactant adding section. Thereby, a micronanobubble generator 4 stably and efficiently produces micronanobubbles in the treatment water as raw water containing the surfactant in the micronanobubble reaction vessel 3. Thus, the micronanobubbles make it possible to efficiently pretreat the wastewater introduced into the micronanobubble reaction vessel. Consequently, it becomes possible not only to enhance efficiency of wastewater treatment but also to reduce a treatment load on wastewater treatment equipment 14 in a step subsequent to the pretreatment. Thereby, scale of the wastewater treatment equipment 14 is reduced.
摘要:
A cooling water reforming method of the invention includes making ozone micro/nanobubbles contained in cooling water in a cooling tower. A cooling apparatus of the invention includes an ozone micro/nanobubble generation section for generating ozone micro/nanobubbles in cooling water in a cooling tower so as to make ozone micro/nanobubbles contained in the cooling water. The ozone micro/nanobubble generation section includes an ozone generator for generating ozone, and a micro/nanobubble generator for generating ozone micro/nanobubbles in the cooling water by using the ozone.