The invention provides a flood control capacity space-time distribution design method of a reservoir group. According to the method, the capacity distribution scheme of the reservoir group can be optimized and designed in space and time, and meanwhile the difference of dispatcher tasks borne by all subsystems can be achieved at the same time. The method is characterized by comprising the following steps that firstly, a reservoir group system capacity space-time distribution optimization model is built, and the optimization model has two stages of objective functions; secondly, a reservoir group large system capacity space distribution optimization model is built, the preliminary capacity distribution scheme values of the reservoir group in space zones are calculated, and zone control of a reservoir group system is achieved; thirdly, based on the reservoir group large system space zones, reservoir staging capacity distribution multi-objective optimization models in the subsystems are built, and capacity distribution of the reservoir group in time stages is calculated; and fourthly, the two stages of optimization models in the second step and the third step are nested, and capacity distribution noninferior solutions of the reservoir group large system in the space zones and the time stages are obtained through calculation.

Flood control capacity space-time distribution design method of reservoir group

The invention discloses a reservoir level control method under a circumstance of frequent flood in a flood season. The method comprises the following steps: S1, determining a first-level cascade reservoir section inflow amount in the flood season according to hydrometeorological information; S2, determining the upper limits of the cascade reservoirs; S3, calculating the last phase volumes of the cascade reservoirs; and S4, calculating the gross generation of the cascade reservoirs. In the cascade reservoirs, the reservoirs with certain adjusting capacities have different adjusting reservoir capacities in different water levels in different stages, and the abilities of flood diversion and storage are also different. By taking typical flood of the reservoirs with certain adjusting properties in the cascade reservoirs as an input, combining with different water levels in different stages in a scheduling graph of the reservoir as a adjusting start water level, and modeling cascade optimization as a target for adjusting calculation, cascaded generating capacity is calculated. The later stage water level of the reservoirs with the certain adjusting properties does not exceed a flood control limited water level or a normal high water level, thereby providing more selections to scheduling operation of the cascade reservoir and providing a policy support for optimal operation.

Reservoir level control method under circumstance of frequent flood in flood season

The invention relates to an electronic device for communication. The electronic device for communication comprises a mobile phone body and a placement assembly. A touch control screen is arranged on the mobile phone body. A control button is arranged on the side wall of the mobile phone body in a protruding manner, the bottom of the mobile phone body is provided with a concave charging slot, the placement assembly comprises a positioning sleeve and a placement kit, and the positioning sleeve is arranged on the mobile phone body. The placement kit comprises a transfer plate and a cover sheet body, wherein the transfer plate is connected with one end of the positioning sleeve, the cover sheet body is connected to the transfer plate, an adhesive region is formed on the cover sheet body, and the cover sheet body is used for covering the touch screen or being adhered to a wall so as to position the mobile phone body. The electronic device for communication does not need to be held by hand during a viewing process.

Electronic device for communication

The invention belongs to the technical field of reservoir scheduling, and discloses a flood limit water level dynamic control method and system based on a self-adaptive graded pre-drainage method, and the method comprises the steps: determining a reservoir flood period water level dynamic control domain according to the allowable reservoir maximum drainage flow in an effective forecast period and downstream flood prevention safety combination flow; when the confronting moment is predicted, the risk reservoir capacities of different confronting moments are adaptively deduced according to the reservoir water levels and the water incoming conditions of the different confronting moments; and grading the effective forecast period, distributing the risk storage capacity to each level of reservoir in an incremental form, and respectively calculating the graded pre-drainage flow according to the risk storage capacity distributed by each level of reservoir. The problems that a traditional pre-drainage capability constraint method drains down according to the downstream allowable safety flow all the time in the pre-drainage process, the water level of a reservoir falls too fast, and reservoir storage after flood is difficult are solved; the problems that when a traditional pre-drainage capability constraint method starts pre-drainage, drainage flow is increased too fast, an artificial flood peak is likely to be caused, and operability is poor are solved.

Flood limit water level dynamic control method and system based on adaptive hierarchical pre-drainage method

The invention relates to the field of hydrology and hydroelectricity, and discloses a reservoir dynamic limited water level ascertaining method and system based on subtropic high intermediate-term movements. The method and system aim to manage the reservoir dynamic limited water level longer than prediction. The method comprises that at evolution periods of at least one associated region, longitude ranges of western ends of the ridges of the subtropic high corresponding to the evolution periods in the east-west direction and the varying function of the longitude of the western ends of the ridges of the subtropic high depending on time are determined according to historical change lows of the subtropic high intermediate-term; longitudes of western ends of the ridges of the subtropic high when precipitation occurs in a reservoir are as division points, so that the evolution period of arbitrary reservoirs affected by the subtropic high in the associated region is divided into six time periods, and the average daily precipitation of the reservoir corresponding to each time period is calculated; the limited water level of the reservoir is planed based on the six time periods according to the varying function of the longitude of the western ends of the ridges of the subtropic high intermediate-term depending on time and the average daily precipitation of the reservoir corresponding to each time period.

Reservoir dynamic limited water level ascertaining method and system based on subtropic high intermediate-term movements

The invention relates to a dynamic operation water level control method for a 3D or higher cascaded reservoirs in flood season. The method comprises the steps that 1) the relation of upper pre-impounded water level limits among the 3D or higher cascaded reservoirs is analyzed on the basis of an aggregation-decomposition theory and a pre-impounding pre-discharge method; 2) an optimized scheduling module which takes the minimal flood prevention risk rate, the minimal under-generation risk rate and the minimal under-impounding risk rate in the effective forecast period of a flood forecast as target functions, the operation water level in the flood season as a decision variable, and a manual fish swarm algorithm as an optimized solution algorithm is established, a non-inferior solution set is provided for dynamic operation water level control in the flood season, and a decision scheme set is provided for a multi-target decision module; and 3) the multi-target decision module which takes the minimal flood prevention risk rate, the minimal under-generation risk rate, the minimal under-impounding risk rate, the maximal generation capacity and the maximal impounding rate as evaluation indexes and a network analysis method as a multi-target evaluation method is established, and a preferable decision scheme of the dynamic operation water level control in the flood season is selected. Thus, theoretical basis and technical support are provided for scientifically making a combined dynamic operation water level control scheme for the cascaded reservoirs in the flood season.

Dynamic operation water level control method for 3D or higher cascaded reservoirs in flood season

The utility model provides a protective housing for electronic device with adsorb attribute by force, its characterized in that: include the protective housing body and locate the gecko tape on the protective housing body, protective housing body accessible gecko tape firmly adsorb in by the object The utility model discloses combine electronic equipment's protective housing body with the gecko tape, under can many sights when both hands are occupied, hang electronic equipment, place a comparatively suitable position of watching, can maintain a visual angle of being convenient for to watch with being in amusement instant music electronic equipment like this, have stronger and extensive suitability, thereby solve the convenience that electronic equipment used under different sights, offerhelp for the person's of facilitating the use amusement and leisure, and peel off easily, can not fall off and can be repeatedly used

Protective housing for electronic device with adsorb attribute by force

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Dynamic operation water level control method for 3D or higher cascaded reservoirs in flood season

Protective housing for electronic device with adsorb attribute by force