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168results about How to "Excellent stability" patented technology

Self-adapting current multiplication circuit and low-dropout-voltage linear voltage regulator integrating same

The invention discloses a self-adapting current multiplication circuit and a low-dropout-voltage linear voltage regulator integrating the circuit. Firstly, constant bias voltage of an NMOS transistor and constant bias voltage of a PMOS transistor are generated through a constant bias voltage generating circuit, and then a lagging current comparator collects small part of load current which is compared with constant current; when a load is in a light load, the lagging current comparator shuts off a self-adapting current multiplication generating circuit, self-adapting current multiplication voltage VBPA rises, the bias current of an operational amplifier of the low-dropout-voltage linear voltage regulator lowers, in this way, stability is guaranteed, and quiescent dissipation is reduced; when the load is in a heavy load from a moderate load, the lagging current comparator turns on the self-adapting current multiplication generating circuit, the self-adapting current multiplication voltage VBPA lowers, the bias current of the operational amplifier increases to the specific times the bias current of the operational amplifier during the light load, the gain bandwidth product of the low-dropout-voltage linear voltage regulator increases, and transient response performance is enhanced.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Multi-metal MOFs derived oxygen reduction/oxygen evolution double-function catalytic material, and preparation method thereof

The invention discloses a multi-metal MOFs derived oxygen reduction/oxygen evolution double-function catalytic material, and a preparation method thereof. The preparation method comprises following steps: room temperature coprecipitation is adopted to synthesis a Zn/Co/Fe multi-metal ZIF precursor; then sulfuration and sintering treatment technology is adopted for combination of oxygen reduction reaction (ORR) active sites (Co/Fe-N-C) and oxygen evolution reaction (OER) active sites (Co/Fe-S) on a monomer material, so that the double ORR/OER electrocatalyst which is low in cost and possesses the performance as good as that of commercially available catalysts is obtained. According to the preparation method, two important factors, including active site distribution and catalytic mechanism,with great influences on material performance are taken into comprehensive consideration, realization of the optimal material catalytic oxidation reduction/oxygen evolution reaction efficiency is taken as a design principle, optimization design is adopted to obtain the best Zn/Co/Fe ratio in the precursor, and the catalyst is provided with the best catalytic performance. The multi-metal MOFs derived oxygen reduction/oxygen evolution double-function catalytic material possesses both high efficiency oxygen reduction and oxygen evolution performance, is high in specific surface area, is abundantin micropores, and is uniform in active site dispersion; and the cost is much lower than that of commercially available precious metal catalyst catalytic materials.
Owner:XI AN JIAOTONG UNIV

Low-power-consumption whole vehicle controller integrated with gateway function

The invention discloses a low-power-consumption whole vehicle controller integrated with a gateway function. The low-power-consumption whole vehicle controller comprises a main control unit, a gatewaycommunication processing unit, an advanced power management unit, an input signal processing unit, an output processing unit, a system storage unit and a breakdown processing unit. A power supply unit supplies electricity to a storage battery, electricity is supplied to a system and a circuit on the periphery of the system by outputting stable voltage through the power supply unit, and normal working of the system is ensured. The main control unit is in data connection with the input signal processing unit, the output processing unit, the storage unit, a breakdown diagnosis unit and the gateway communication unit through a high-speed SPI communication interface, an AD port and a CAN interface, and network information interconnection of a whole vehicle CAN bus is achieved. The low-power-consumption whole vehicle controller can be applied to the situation that a main control unit with pure electric and hybrid vehicle models serving as wholes vehicles coordinates all sub-controllers to work, the new energy whole vehicle controller function is achieved functionally, the gateway function is also achieved, the number of vehicle body electronic controllers is reduced, and the vehicle body space is effectively utilized.
Owner:SHENYANG ZHONGKE E WAY ELECTRONICS TECH CO LTD

Target tracking method for modeling by integrating description method and discriminant method

The invention discloses a target tracking method for modeling by integrating a description method and a discriminant method, which comprises the following steps: 1, t=1, randomly extracting a multiscale small image block set from a tracked object and neighboring backgrounds of the tracked object in a first frame image and training a pair of support vector machines in a second category and a pair of support vector machines in a first category serving as a model of the tracked object; 2, randomly extracting a multiscale small image block set in a t+1 frame image and determining degree of confidence that the small image block set in the t+1 frame image belongs to the tracked object through the model of the tracked object, and constructing a confidence image by using the degree of confidence of a small image block in a new frame image and central coordinates of the small image block; acquiring a new position of the tracked object in the new frame image by using a mean shift algorithm on the confidence image; classifying the small blocks in the current frame according to the degree of confidence of the image block and the new position of the tracked object, and updating the model of the tracked object according to the classification result; 3, if not reaching the last frame of a video file, increasing t and returning to the step2; and 4, stopping.
Owner:INST OF AUTOMATION CHINESE ACAD OF SCI

Catalyst for preparing light aromatic hydrocarbon by synthetic gas one-step process, and preparation method and application thereof

The invention discloses a catalyst for preparing light aromatic hydrocarbon by synthetic gas one-step process, and a preparation method and an application thereof. The catalyst comprises a Fischer-Tropsch synthesis catalyst and an aromatization catalyst, wherein the Fischer-Tropsch synthesis catalyst includes an oxide of Fe and an oxide of Mn, and a composite metal oxide can fully improve the high-temperature Fischer-Tropsch synthesis activity; the aromatization catalyst is a modified molecular sieve with HZSM-5 as a carrier and with Mo and Ni double metals as active components, and the aromatization performance can be significantly improved. Through the combination of the two catalysts, series coupling of a Fischer-Tropsch synthesis reaction and an aromatization reaction is achieved, a one-way conversion rate of CO is increased obviously, and at the same time, a technology route for preparing light aromatic hydrocarbon-benzene, toluene and xylene (BTX) by synthetic gas one-step process is exploited. Experiments verify that the conversion rate of CO reaches up to 98% or more, the selectivity of hydrocarbonyl of aromatic hydrocarbon reaches 73% or more, and the selectivity of hydrocarbyl of BTX reaches 53%. The catalyst for preparing aromatic hydrocarbon by the synthetic gas one-step process has the advantages of relatively good catalytic activity, good stability and simple preparation, and has relatively good industrial application prospects.
Owner:EAST CHINA UNIV OF SCI & TECH

Method for preparing sulfhydryl anchored platinum and platinum-gold/carbon nano-tube catalyst

InactiveCN101301615ASolve the technical problem of reduced surface area and reduced activityEnables mass productionPhysical/chemical process catalystsCell electrodesPlatinum saltsCarbon nanotube
The invention provides a preparation method of sulfhydryl anchoring platinum and platinum-gold / carbon nano-tube catalyst, belonging to fuel cell technical field. The method comprises following steps: reacting hydroxylation carbon nano-tube successively with reagent containing halogen and hydrosulphide to prepare sulfhydryl carbon nano-tube; reflowing the sulfhydryl carbon nano-tube and platinum salts in polyatomic alcohol, processing in hydrogen atmpsphere to obtain sulfhydryl anchoring platinum / carbon nano-tube catalyst; reflowing the sulfhydryl carbon nano-tube successively with the hydrochloroauric acid and the platinum salts in polyatomic alcohol, processing in hydrogen atmpsphere to obtain sulfhydryl anchoring platinum-gold / carbon nano-tube catalyst. The sulfhydryl anchoring platinum and platinum-gold / carbon nano-tube catalyst prepared by the invention has good stability and catalytic performance, can effectively settle the technical problems that the catalyst surface area is lowered and the activity is declined caused by surface migration and agglomeration growth on carbon carrier of platinum nanometer particles, and can also replace homogeneous commercialized catalyst.
Owner:CHONGQING UNIV
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