82 results about "Slope length" patented technology

The invention relates to a soil slope water flow erosion resistance simulation test method and device. The device comprises a liftable slope simulation device, a sheetflood scouring simulation device, a water and soil collecting device, a flow velocity determining device and a slope surface form camera device. According to the test method, the water flow is controlled, surface flow and seepage are formed, and sheetflood water, seepage water and sediment quantity formed by scouring slopes by sheetflood water are collected. The flow, the flow velocity, the erosion depth, the sand yield and the like of the water flow are measured quantitatively. Compacted soil is soaked in water until saturation for simulation, the efficiency of an indoor simulation test on slope scouring is improved, the test period is shortened, the test result proves the maximum depth of a slope erosion gully and the change rule of the sand yield with time, discloses the relation between the water flow erosion capacity of catchment behind slopes and the slope length, gradient and time and provides a basis for prediction of the water flow erosion scale and the need of slope protection and reinforcement. The device is simple in structure, convenient to operate and suitable for measurement of soil mechanics parameters of slope soil mass.

The invention discloses a dynamic filtering modeling downscaling method of an environment variable on the basis of low-resolution satellite remote sensing data. The dynamic filtering modeling downscaling method comprises the following steps: firstly, carrying out aggregation calculation on 1km environment variable factors including eight pieces of data i.e., a vegetation index, a digital evaluation model, daytime surface temperature, night surface temperature, a topographic wetness index, a gradient, a slope aspect and a slope length gradient, into 25km to serve as independent variables, and taking corresponding 25Km resolution TRMM (Tropical Rainfall Measuring Mission) 3B43 v7 precipitation data as a dependent variable. An M5 method divides data sets formed by each environment variable into different vector spaces according to geographical similarity, then, the most effect environment variable is independently dynamically filtered in different vector spaces, and a divisional multiple regression model is independently established in the corresponding vector space; and the model is finally applied to the 1km environment variable to finally obtain a precipitation product of the 1km resolution. A downscaling result obtained by partitioning and dynamic factor filtering is obviously superior to a downscaling result based on a conventional regression model.

The invention discloses a TRMM (Tropical Rainfall Measuring Mission) satellite rainfall product downscaling method based on M5-Local and a multi-environmental factor variable. An M5-Local regression thought is adopted, and a plurality of environment stress factors with high spatial resolutions are fully utilized to improve the spatial resolution of the product. Firstly, 1km environmental variable factors, such as eight pieces of data including a vegetation index, a digital elevation model, a daytime surface temperature, a night surface temperature, a terrain moisture index, a gradient, a slope aspect and a slope length gradient, are subjected to aggregate calculating to obtain 25km which serves as an independent variable, corresponding 25km-resolution TRMM data is used as a dependent variable, an M5-Local method is adopted for modeling, the intercept of a regression modeling equation of 1km spatial resolution and a slope parameter corresponding to each environment factor variable are predicted, and a 1kmTRMM rainfall value is calculated. A downscaling result based on an M5-Local model is obviously superior to a downscaling result of a conventional regression model.

The invention provides a non-point source pollution calculation method based on a remotely sensed image element. The method comprises the following steps of: 1, constructing a land utilization database and a vegetation coverage database; 2, constructing a soil type database, a soil nitrogen and phosphorus attribute database and a gradient and slope length geographic space database; 3, constructing a farmland nitrogen and phosphorus balance amount space database; 4, calculating dissolved state non-point source loads and adsorption type non-point source loads of non-point source pollutants under different pollution types according to database information in the steps from 1 to 3 and the pollution types; and 5, calculating a total amount of non-point source pollutants in a river according to the dissolved state non-point source loads and the adsorption type non-point source loads. By the method, under the condition that a data condition is limited, a non-point source pollution space distribution feature and a source intensity feature can be quickly obtained based on remotely sensed data; effective pollution monitoring measures can be supplied to a pollution prevention, treatment and management department; and important technology support can be supplied to flow domain pollution management.

The invention discloses a technique for safe improvement as well as ecological repair and reconstruction of a mine soil discharge yard. The technique is implemented according to the following processes and steps: carrying out comprehensive optimization according to experience, calculation and land use properties to determine slope, slope length and flat pan width of the soil discharge yard, and designing slope cutting grade of an accumulation side slope of the soil discharge yard into three grades, wherein the height of each grade of slope is 9-11 m, the flat pan width of the side slope is 4-8 m, and the slope ratio is as follows: the first grade is 1:(2.0-2.1), the second grade is 1:(1.7-1.8) and the third grade is 1:(1.45-1.60); preparing the flat pan into a horizontal, slope or reverse slope type; and constructing the first-grade and second-grade side slopes by adopting grass planting in stone masonry arch rack, slope bottom apron protection, and designing mortar flag stone side slope flat pan and water discharge channel of the flat pan as well as slope edging, constructing the third-grade side slope by a vetiver grass slope protection greening technique, firstly sowing Bahia grass in the flat pan of the soil discharge yard with the seed amount of 15-25 g / m<2>, after sowing, maintaining and managing in time, checking seedlings and supplementing deficient seedlings, harvesting 1-2 times every year and maintaining seedling height of 20-30 cm when most stem tillers enter fringe-bearing flourishing growth stage, and planting fruit trees or crops in the flat pan after 1-2 years. In the technique disclosed by the invention, engineering measure and biological measure are comprehensively adopted to ensure the safety of the mine soil discharge yard and achieve good ecological repair effect and landscape effect; and plants adaptable to local conditions are planted and the cost is lower.

The invention discloses a CMORPH satellite precipitation data downscaling method based on Fuzzy-OLS (Ordinary Least Squares) and a multi-environment factor variable. The method comprises the following steps: firstly, aggregation calculation is carried out on 1km environment factor variables, i.e., eight pieces of data including a vegetation index, a digital elevation model, daytime surface temperature, night surface temperature, a topographic wetness index, a gradient, a slope direction and a slope length gradient to 25km to serve as independent variables, and the CMORPH data of a corresponding 25km resolution is used as a dependent variable. On the basis of a fuzzy aggregation idea, the optimal aggregation number and aggregation center of the environment variable under the scale of 25km can be calculated so as to divide a whole sample set into subsample sets with most prominent difference, so that samples in each subsample set have a maximum similarity, and a least square regression model is independently established for each subsample set so as to predict the downscaling precipitation data of 1km. A downscaling result based on the Fuzzy-OLS model is obviously superior to the downscaling result of a conventional regression model.

The invention discloses a method for quantitatively monitoring the soil erosion change amount in real time for water and soil conservation comprehensive treatment. The method includes the steps that remote sensing images generated before and after water and soil conservation comprehensive treatment on a research area are acquired; a digital elevation model (DEM) and water and soil conservation measure remote sensing image pattern spots are extracted; the image pattern spots serve as a unit, and slope length factors L and gradient factors S of the pattern spots are calculated; vegetation coverage degrees B of the pattern spots are calculated through the normalized difference vegetation index (NDVI), and vegetation coverage or crop factors C of the pattern spots are estimated according to the vegetation coverage degrees B; water and soil conservation measure factors P of the pattern spots are assigned according to existing research results; the soil erosion amount reduction proportion SEDP is calculated according to the formula that SEDP=1-SE<after-treatment> / SE<before-treatment>, wherein the SE<before-treatment> and the SE<after-treatment> express the soil erosion amount obtained before water and soil conservation comprehensive treatment of the research area and the soil erosion amount obtained after water and soil conservation comprehensive treatment of the research area respectively. The soil erosion amount change can be acquired only through extraction of remote sensing image information, invested cost is relatively low, and the method is convenient and quick.

The invention discloses a transverse-furrow and sequential-ridge mellow soil anti-corrosion farming method of a purple soil slope farmland and particularly relates to the field of a soil erosion management technique of the purple soil slope farmland. In the method disclosed by the invention, a transverse furrow is excavated along the contour line on the purple soil slope farmland at the slope length interval which is less than the rill erosion generation critical length of the modified slope surface; the cross section of the transverse furrow is in an arc shape; the formed transverse furrow divides the whole slope farmland plot into multiple small farming units in the transverse slope direction; the two ends of the transverse furrow are connected with the original drainage furrows at the two ends of the slope farmland plot; and the integral farming terrain conditions with alternate furrows and ridges are formed by adopting a sequential-slope ridging farming mode, i.e. alternately farming and ridging in the sequential slop direction and reverse slop direction. The method disclosed by the invention can reduce the water and soil loss and prevent and control the soil erosion of the slope farmland, is beneficial to the enhancement of the water content in the soil of the farmland plot in the descending direction of the transverse furrow, improves the drought resistance of crops, maintains the agricultural productivity of the slope farmland and realizes the sustainable utilization of slope farmland water and soil resources.

The invention provides a slope stability analyzing method, which comprises the following steps that 1, slope parameters are input; 2, the circle center O and the radius R of a slope are assumed; 3, a crossed part of a half slope and a circular arc drawn according to the assumed circle center O and radius R is subjected to strip splitting and numbering; 4, Li, Wi and theta values of each strip are calculated; 5, the safety factor Fs is obtained according to the Li, Wi and theta values; 6, a plurality of Fs are obtained; 7, the minimum values of the safety factor Fs is screened and is used as the slope safety factor to be output; according to the slope length and the slope height of the half slope, the circle center and the radius of a slope landslide are assumed, in addition, a circular arc is drawn according to the assumed circle center and radius, a crossed part of the circular arc and the slope is subjected to strip splitting, in addition, the slope safety factor is calculated, meanwhile, the circle center and the radius are assumed for many times, the slope safety factor is calculated for many times, in addition, the calculated safety factors are compared, and the minimum value is selected as the slope safety factor. The scheme has the advantage that the calculation is simple and accurate.

The invention discloses a method for determining the soil erosion on a drainage basin or regional scale. The method comprises the following steps of: S1, reducing basic data, constructing an erosion trench diagram and digital elevation data through field GPS measurement, remote sensing data and a digital topographic map; S2, expressing an erosional land form, so as to obtain a DEM with a correct hydrological relationship; S3, extracting an erosion slope length unit, calculating a gradient and a slope length according to the obtained digital elevation data of partial regions, and partitioning the slope length of the unit; S4, extracting an L factor and an S factor in erosion, figuring out the L factor and the S factor according to the extracted gradient and the extracted slope length; S5, popularizing and applying an algorithm and designing a corresponding algorithm. According to the method, the idea of a flow distribution strategy is innovatively applied to the extraction and calculation of the slope length of the unit, the slope length of the unit is deemed to be a basic calculating unit, the slope length is distributed according to the flow distribution strategy, the slope length and the gradient are calculated, and the L factor and the S factor are extracted, and thus the method can be conveniently and rapidly applied to a large region or drainage basin range for carrying out factor extraction and further measuring soil erosion and is easy to popularize and use, and the determining precision is greatly improved.

The invention relates to a transportable surface runoff observation installment, which is suitable to observe the surface runoff under each kind of field condition. The installment is mainly composed by the runoff collecting device, the runoff sample gathering installment, the runoff quantity recognizer, the data measurement system, rainproof guarantees shielding five parts. Using the equipment can carry on the immediate determinant under each kind of area, the different land utilization way, the different management measure, the different slope, the slope length surface runoff. Compares with the traditional runoff plot observation, the invention has transportable, directly carries on the observation, the high sample gathering accuracy under the natural condition of local growth runoff, the construction cost low, the use factor high, the application scope observation to the unit time runoff intensity merit and so on; compared with the existing transportable runoff observation installment, it has the merit of satisfying the open country great current capacity runoff observation, the simple installment and operation, the electronic record, the high observation accuracy, the few breakdown and so on. The installment installs easy to operate, the real result, the lower construction cost, is suitable for to promote.

The invention discloses a method using ecological trenches to intercept forest surface runoff, and aims to provide a method reducing water and soil loss in woodland of large slope and loosening soil; the method comprises the following steps: dividing the woodland with large slope into a plurality of small units in a contour direction; arranging ecological trenches on the lower portion of each unit along the contour; planting local shrubs and herbals in the ecological trenches so as to intercept surface runoff, thus reserving water and soil. The method can divide slope length so as to cut the slope runoff flow lines, thus reducing slope current flow velocity, prolonging runoff detention time on the slope, enhancing infiltration, reducing surface runoff amount and current sand carrying ability, reducing soil loss rate, and effectively improving forest water and soil maintenance capability. The method is simple and easy in operation, and simple means can realize water and soil maintenance effect, so the method is small in invest and cost, and has small damages on the forest.

The invention relates to a hybrid electric vehicle, a constant speed cruise control method and a constant speed cruise control system. The constant speed cruise control method includes the steps of detecting slope information at a set distance in front, detecting corresponding slope length information when the detected slope information is greater than or equal to a set first slope threshold, detecting the SOC (state of charge) of a power battery when the detected slope length information is less than or equal to a set slope length threshold, calculating the amount of power increase due to increased ramp resistance according to gradient, vehicle weight and cruising speed when the SOC of the power battery is greater than or equal to a set first SOC threshold, outputting the amount of the power increase through a motor, calculating the torque value that the motor needs to output based on motor speed, sending a signal to the motor through a controller, and controlling the output torque value of the motor in an electric state to balance and realize unchanged vehicle speed due to the increase of ramp resistance power. With vehicle information combined with road condition information, the constant speed cruise control method has the advantage of enabling the control reliability of constant speed cruise to be high.

The invention discloses a region scale soil erosion modeling-oriented terrain factor parallel computing method and belongs to the technical field of computers and information. The method comprises the following steps: (1) determining a data partitioning strategy, and performing equal-row partitioning on original terrain data by a row buffer zone partitioning method according to the number of parallel nodes, wherein each sub data block comprises three elements of a data zone, a buffer zone and a control point; (2) performing slope parallel computing, water flow direction computing, flow accumulation computing, river network extraction computing, slope length computing and slope-slope length factor computing based on preprocessed DEM (digital elevation model) data according to the data partitioning strategy. According to the method, the computing characteristics of a serial algorithm are fully considered in the design process of a parallel algorithm; different parallel strategies are designed for a local algorithm and a global algorithm respectively; the parallel efficiency of the algorithms is effectively improved; terrain factors based on mass terrain data can be quickly and accurately computed.

The invention discloses a slope length, slope gradient and slope direction comprehensive measurement device. The slope length, slope gradient and slope direction comprehensive measurement device mainly comprises a laser range finder, a range finder fixer, a slope direction measuring compass, a round leveling instrument and a support rod, wherein the laser range finder is fixed on the support rod through the range finder fixer; the support rod is also fixedly provided with the slope direction measuring compass and the round leveling instrument. The slope length, slope gradient and slope direction comprehensive measurement device obtains the slope length and the slope gradient by utilizing similar triangles and the principle of resolving a right triangle and obtains the slope direction by utilizing a terrestrial magnetism principle; and the slope comprehensive measurement instrument has the advantages of being convenient, fast, efficient and integrated in operation, and the like.

The present invention discloses a Karst plateau mountain area terrain slope length measuring method and a Karst plateau mountain area terrain slope length measuring instrument. According to the method, based on the trigonometric function solving principle of a hypothetical triangle and a laser range finder principle, a laser range finder is fixed on a telescopic supporting rod; the telescopic supporting rod is inserted into the bottom, middle or top of a slope required to be measured; the laser range finder aims at a target point, and at this movement, the laser range finder, the target point and the bottom of the telescopic supporting rod constitute a hypothetical triangle; a linear distance from the laser range finder to the target point, an angle between the laser range finder and the target point, and a vertical distance from the laser range finder on the telescopic supporting rod to the ground are calculated; and the length of any side of the triangle and the degree of any angle of the triangle are calculated according to the trigonometric function solving principle, namely, the length and gradient of the target slope can be obtained. With the Karst plateau mountain area terrain slope length measuring method and measuring instrument of the invention adopted, the measurement of the length of a slope in Karst plateau mountain area terrain can be realized perfectly. The measuring method or measuring instrument of the invention has the advantages of high precision, lightness, quickness, portable convenience, high measurement and calculation speed, relatively low cost and the like.

Provided is a heat exchanger in which: condensed water drainability can be improved; resistance to frosting can be improved; heat exchange performance can be improved; and fin rigidity can be improved. Also provided is an air conditioner using said heat exchanger. A plate-shaped fin (1) comprises: a slit shape (12) that is formed by cutting and raising a portion of the plate-shaped fin (1) and that is opened so as to oppose the flow of a fluid; and a waffle shape (11) formed into a mountain shape, in cross section, that protrudes in the stacking direction by bending a portion of the plate-shaped fin (1), the ridge line of the mountain shape being substantially orthogonal to the air flow direction. The waffle shape (11) is provided more on the upstream side of the fluid than the slit shape (12), and is made such that the slope length (L1) of the mountain shape on the upstream side is shorter than the slope length (L2) on the downstream side.

The invention discloses a system for predicting slope gradient and slope length in advance by using on-board pulsed laser radar. The system comprises a hardware system and a software system. The hardware system comprises an on-board pulsed laser radar, a rotary joint system, a single-chip microcomputer, a Y-shaped support, a vehicle speed sensor, a tire pressure sensor and a display. The softwaresystem includes a filter module, a pulsed laser radar control module, a rotary joint control module, a ramp prediction mode selection module, a gradient and slope length calculation module and a gradient and slope length value selection module. In a dynamic working condition of a vehicle, the system can realize prediction of gradient and slope length of a single ramp and a continuous ramp in advance, and accuracy is high, and calculation capability on a processor is low. Weight of the pulsed laser radar is light, volume is small, and the system is simple in operation and fast in speed.

The invention provides a target-stratum-frequency-spectrum-based design method of a non-linear scanning signal of a vibroseis. The method comprises: optimizing an exploration area profile, logging, or typical single gun and carrying out a target stratum frequency spectrum analysis, and carrying out fitting to obtain a frequency spectrum curve A(f); according to a frequency and energy requirement of an exploratory area, designing a starting frequency, a scanning length, and a start-stop slope length; solving a time function t(f) corresponding to each sampling frequency; carrying out inverse transformation on the time functions t(f) to obtain time frequency functions f(t); and carrying out integration on the time frequency functions f(t) to calculate an instantaneous phase, thereby calculating a sinusoidal vibroseis scanning signal. According to the invention, with the generated vibroseis scanning signal, objectives of improvement of the energy and signal to noise ratio of the target stratum of the exploratory area can be achieved. Especially for the complicated work area, the scanning signal design can be realized according to the different buried depths of target stratums at different zones of the work area, thereby improving the quality of seismic data excited by the vibroseis.

The invention discloses a recompaction and plant covering combined protection method for a loose unsaturated soil slope shallow layer. Loose residual soil or slope soil which is 2-3m thick under a slope is excavated, a plurality of water draining blind ditches in the slope direction are arranged at equal intervals from the slope foot to the 1 / 3-1 / 3 slope length position, the blind ditches are all communicated with water leakage holes formed in a slope foot retaining wall, the excavated loose residual soil or slope soil are layered and compacted until the compaction degree is more than 90%, namely a recompaction covering layer is formed, nutrient soil with the thickness as 0.15-0.3m is laid on the recompaction covering layer, and short and small plants are planted in the nutrient soil. The recompaction and plant covering combined protection method for the loose unsaturated soil slope shallow layer can effectively reduce rainfall infiltration, controls the height of a seepage line at the lower portion of a slope, keeps suction force of unsaturated soil, improves shearing resistance of a soil body and effectively prevents the loose unsaturated soil slope shallow layer from sliding. The slope protection method can use local materials, is easy to construct, low in construction cost and strong in practicability and has a good ecological restoration effect.

The present invention provides a multi-stage road network section traffic capacity determination method. The method comprises the following steps: S1, obtaining the road distribution condition in a road network, comprising dividing the road network into m sections, taking X as a road section set, dividing jth section xj into n slope sections, taking Y as a slope set and taking Z as a slope length set; S2, calculating the road capacity Qj when the jth road reaches the maximum efficacy; and S3, according to the road capacity Qj, calculating the capacity Q of the whole road network: (img file='DDA0001302194120000011. TIF' wi='269' he='164' / ). According to the invention, the multi-stage road network section traffic capacity determination method can perform accurate calculation of the multi-stage road network traffic capacity and obtain an accurate result so as to image the application range.

The invention provides a slope length extraction method based on an SRTM. The method comprises the steps: building a grid model under geographic coordinates, and directly deducing a calculation mode of the side length of an SRTM grid from the grid model; when the slope length is calculated, the influence of slope truncation and river network truncation is considered, the result meets the actual situation as much as possible, and finally the accumulated slope length of the SRTM is calculated through forward and reverse traversal. Compared with a traditional method, the method has the advantagesthat projection coordinate transformation is not needed any more, and therefore the slope length extraction efficiency is improved; meanwhile, it can be guaranteed that the precision of original datais not reduced, the slope length extraction result is relatively accurate, the slope length result is compared with an existing DEM calculation result to be displayed, the slope length difference value range is centralized, and regularity is achieved.

The invention relates to a rapid green-recovering method for ground cover plants in mountain forests, and belongs to the technical field of green recovery in the mountain forests. A concept of ''storage and seepage'' in a sponge city is applied to the method, water storage grass ditches are arranged according to different slope lengths and slope degrees of mountain slopes, different plats are sequentially planted in the mountain slopes in the mountain forests from the top to the bottom, and the drought-tolerant moisture-tolerant dwarf plants or ground cover plants are planted in the water storage grass ditches. The method provided by the invention has the advantages of simple construction, a wide applicable region, low investment costs, a quick effect, convenient later management, and easycopying and promotion.

The invention provides a route planning method, system and equipment as well as a storage medium. The method comprises the following steps: determining downhill slope value and downhill slope length of a to-be-determined road section; calculating safe brake total distance of a vehicle for braking on a road surface with the downhill slope value of the to-be-determined road section; judging whetherthe safe brake total distance is smaller than the downhill slope length of the to-be-determined road section; if yes, determining the to-be-determined road section as an avoided road section. With theadoption of the scheme, whether the road section is to be avoided or not is determined by combining the slope angle and the downhill slope length of the to-be-determined road section, so that a safetraveling route is planned; when the method is applied to navigation route planning, safety of each road section in a navigation route can be judged, road sections having the probability of danger areeliminated in advance, the method can also be applied to judgment of safety of the current traveling road section of the vehicle, a driver is reminded to decelerate in advance in case of possible danger, and accordingly, traveling safety of the driver is guaranteed to the greatest extent.

The invention discloses a method for measuring soil loss amount through a military map. The method comprises the first step of calculating a rainfall erosion factor R value, the second step of calculating a soil erodibility factor K value, the third step of calculating a slope factor S, the fourth step of calculating a slope length factor L, the fifth step of measuring a vegetation cover and management factor C, the sixth step of measuring a soil and water conservation measure factor P and the seventh step of calculating the soil loss amount. The method solves the technical problems that in the prior art, measuring errors for the soil loss amount are large, and manpower and material resource investment is large.

The invention provides a basin erosion sediment production predicting method coupling with different spatial and temporal scale models. The method comprises the following steps: dividing a to-be-detected drainage basin into m sub drainage basins according to DEM topographic data and a remote-sensing image of the to-be-detected drainage basin; carrying out statistics on rainfall times n of each subdrainage basins every year, calculating the erosion sediment production and spatial distribution thereof of each sub drainage basin after rainfall every time and updating the DEM data of each sub drainage basin to obtain updated DEM data; and then calculating the gradient and slope length factor LSl of the lth sub drainage basin W1, and calculating the annular erosion sediment production f (Wl) according to a rainfall erosive force factor Rl, a soil erosive factor Kl, a slope length factor LSl, a vegetation factor Cl, an engineering measure factor El, a tillage measure factor Tl and a liner erosion coefficient factor Gl of Wl so as to further predict the annular erosion sediment production of the to-be-detected drainage basin W. The method overcomes the defect that the topographic parameters of a single experience model are immobilized and considers maldistribution of the rainfall space and the erosion sediment production mechanism fully, so that the soil erosion process can be betterreflected.

The invention relates to a quantitative expression method of erosion sediment transport capacity of shallow trench. The method comprises the following steps: S1, measuring a sediment content corresponding to the shallow trench along with different trench lengths under different hydrodynamic conditions, and obtaining a corresponding relationship between the erosion sediment concentration of the shallow trench and the trench lengths; S2, according to the corresponding relationship between the erosion sediment concentration of the shallow trench and the trench lengths obtained in S1, calculatinga sediment transport amount per unit time of water flow of the shallow trench erosion under different hydrodynamic conditions; S3, according to the data in S2, obtaining a composite nonlinear mathematical relationship of the sediment transport amount per unit time of the water flow with the change of trench lengths under different hydrodynamic conditions; and S4, calculating the sediment transportcapacity according to the composite nonlinear mathematical relationship of the sediment transport capacity with the change of the trench lengths in S3. According to the quantitative expression methodof the erosion sediment transport capacity of the shallow trench, the erosion sediment transport capacity of the shallow trench under any hydrodynamic condition can be calculated only by establishinga response relationship between the sediment transport capacity of the shallow trench and a slope length.

The invention provides a roof afforestation system which comprises roof planting modules, sectional buffering modules, a drain blind pipe, a drain eave gutter and a drainage device. Each roof planting module comprises planting soil and a vegetation unit, each sectional buffering module comprises a pebble groove, soil retaining units and filter layers, the roof planting modules are formed on a roof through the sectional buffering module, each sectional buffering module is arranged between two corresponding adjacent roof planting modules, the soil retaining units are arranged on two sides, in a slope direction of the roof, of each pebble groove, and each filter layer is arranged on one side, close to the corresponding roof planting module, of the corresponding soil retaining unit; the drain blind pipe is arranged below the planting soil between the sectional buffering modules and the drain eave gutter, the drain blind pipe penetrates the filter layers and the soil retaining units and is communicated with the pebble grooves, and water on the roof flows into the drain eave gutter through the pebble grooves and the drain blind pipe and is discharged through the drainage device. The roof is divided into the roof planting modules through the sectional buffering modules, sloping length of each roof planting module is reduced, and uniformity in soil distribution and soil humidity caused by gravity erosion of rainwater is lowered.

The invention discloses a near-surface wind speed statistical downscaling correction method based on a slope length. The method comprises the following steps: step 1, downloading CIMISS actual measurement meteorological data in real time; 2, downloading WARMS mode data in real time, calculating topographic parameters in combination with topographic data used by the mode, and outputting a topographic parameter file; and 3, according to the actual measurement data, the corresponding mode forecast data and the topographic parameters, training a statistical correction relation to obtain a correction model, and correcting the mode forecast wind speed. According to the near-surface wind speed statistical downscaling correction method based on the slope length, through the arrangement of the first step, the second step and the third step, the forecasting capacity of a mode near-surface wind field under the complex terrain can be effectively improved.

The invention discloses an intelligent throttle control method based on road spectrum information. The method comprises the following steps of acquiring vehicle position information and sending the information to a common rail line; sending the vehicle position information and road spectrum information of a road to an ECU by the common rail line; determining the slope and slope length of a vehicleposition and then determining a corresponding speed - torque MAP map and MAP correction coefficient by the ECU according to the obtained vehicle position information and the road spectrum informationof the road; determining whether it needs to switch the MAP map by the ECU according to a vehicle throttle change rate, switching the MAP when the switch is needed and correcting the torque; and controlling the vehicle throttle based on the corrected torque. The method can adjust the engine output torque according to the road spectrum information of the road and solve the problem of insufficientpower when a vehicle goes uphill.