156results about How to "Reduce quality fluctuations" patented technology

The invention discloses a polycarboxylic acid-lignin composite additive. The additive is characterized in that: the additive is composed of the components of, by weight: 20-45% of a polycarboxylic acid water reducer, 1-11% of a lignin water reducer, 0.01-0.5% of an air-entraining agent, 0-3% of a slump-retaining agent, 0-0.9% of a retarding agent, 0-3% of an early strength agent, and 39-66% of water. The total amount of the components accounts for 100% by mass. When the contents of the slump-retaining agent and the retarding agent are not 0, the content of the early strength agent is 0. When the content of the early strength agent is not 0, the contents of the slump-retaining agent and the retarding agent are both 0. According to the invention, the polycarboxylic acid water reducer and the lignin water reducer are complexed. Compared with a single polycarboxylic acid water reducer or a single lignin water reducer, under a same concrete water reducing rate, the dosage of the polycarboxylic acid component is reduced, and the cost is reduced. The quality of the concrete is easy to control, and quality fluctuation is reduced. The water reducing rate of the concrete is improved. When the additive is added into concrete, the quality of the concrete is improved.

The invention provides a panoramic video transmission method, a transmission device and a transmission system, wherein the panoramic video transmission method is applied to a client and comprises thesteps of acquiring a media file from a server end and analyzing the file, and downloading video segments according to the media file; in a loading process, acquiring head position information of a user, and predicating viewing probability of the video segments according to the head position information; calculating the size of a video playing buffering area, and calculating a total code rate upperlimit of the video segments according to the estimated network bandwidth and the size of the video playing buffering area; calculating the spatial quality change of the video segments and the expected distortion of the video segments, establishing a QoE model according to the spatial quality change and the expected distortion of the video fragments, and selecting the to-be-downloaded video fragments. The panoramic video transmission method, the transmission device and the transmission system realize technical effects of reducing data volume in panoramic video transmission, improving video quality, reducing spatial quality fluctuation and lags in video playing.

The invention discloses a video coding method and device, a storage medium and an electronic device. The method comprises the following steps of acquiring a first video clip to be coded, wherein the first video clip is one of a plurality of video clips included in a target video, and each of the video clips is allocated to one corresponding encoder for encoding; copying a first video frame in thefirst video clip to obtain a second video frame, wherein the first video frame is a video frame located at the edge position in the first video clip; determining a first frame type of the first videoframe according to the first video frame and the second video frame; and encoding the first video frame according to the first frame type. According to the video coding method and device, the storagemedium and the electronic device, the technical problem that the definition of a video image loses coherence in the related technology is solved.

The invention relates to the field of hot-rolled band steel production control, in particular to a method for controlling the opening degree of a rough rolling edger during the rolling of a tapered slab. A method for controlling the opening degree of a rough rolling edger during the rolling of a tapered slab includes the following steps: step 1 of dividing a slab into three sections, respectively: a head parallel section, a middle oblique section and an end parallel section, with the width of the head parallel section being larger than that of the end parallel section; step 2 of reading the original data of the slab; step 3 of determining the shape equation of the slab according to the original data of the slab; step 4 of selecting a plurality of characteristic points on the shaft of the slab at equal intervals, and obtaining the coordinates of the characteristic points by calculation; and step 5 of setting various parameters required by this rolling procedure according to the obtained coordinates of the characteristic points of the slab. In the invention, by accurately describing and defining the shape of the tapered slab, and precisely calculating the set values of the opening degree of the edger during the process in which tapered slabs in various shapes pass through the edger, the products rolled from the tapered slabs have no difference with products rolled from normal slabs in terms of quality precision.

The invention provides a laboratory mix proportion design method of permeable recycled aggregate concrete. The laboratory mix proportion design method is adaptable to characteristics of more cracks, high water absorption rate and large design mix proportion experimental result volatility of building rubbish recycled aggregates. Compared with a common concrete mix proportion design method, by the aid of an experiment and calculation combined method and a framework volume filling method, double-control indexes design void ratio and compressive strength serve as a main design target, and a recycled coarse-fine aggregate and natural sand serve as design references of a surface dry state and an air drying state respectively. The design method is simple, practical, narrow in fluctuation range, less in cement content, high in recycling degree, economical and environmentally friendly, quality is easily controlled, and addition agents and admixtures are omitted.

The invention belongs to the technical field of building cladding plate materials, and in particular relates to a fiber reinforce plastic hollow plate continuous forming process. A fiber reinforce plastic hollow plate produced by the invention is composed of an outer panel, a plurality of longitudinal rib plates and an inner panel which are bonded and combined from top to bottom into a whole, and is continuously formed by using a one-step method. A mode that films support gumming felts is applied to the outer panel, the plurality of longitudinal rib plates and the inner panel. The fiber reinforce plastic hollow plate continuous forming process comprises the following steps of: step A, preparing the continuous longitudinal rib plates; step B, preparing the inner panel and implanting the longitudinal rib plates in a wet state; step C, preparing the outer panel, covering and integrating; and step D, heating and curing, bonding and integrating during the continuous forming process, forming a longitudinal continuous hollow plate belt, and cutting according to the required dimension, thereby obtaining a finished product. The method provided by the invention is used for solving the technical problem that a single block forming process is low in production efficiency in the prior art and achieving the beneficial effects of improving the production efficiency and achieving scale production.

A saw-tooth clothing for rollers and/or cylinders of flat cards or roller cards has an elongate foot region and an adjoining tooth region (blade) in which teeth have been formed by cutting, with a tooth front a tooth back and two side flanks, wherein between the tooth back and the tooth front of two adjacent teeth there is a gullet and the teeth consist of at least two portions, with a first portion, forming a technologically effective region. In order to provide a clothing that retains a high level of aggressiveness over its lifetime, the first portion of the tooth front is convex or approximately convex in the direction of movement of the clothing.

The invention provides a secondary formula treatment technology for tobacco leaves. The treatment technology sequentially comprises the steps of slicing, loosening reversion, leaf structure improving,pre-mixing, secondary leaf moistening, leaf preparation and storage, leaf drying, cooling reversion, screening, metering packaging and the like. According to the cigarette formula requirement, tobacco leaves of different grades and small scale are compatible again, the new grade is formed, loosening, uniform mixing and packaging are performed through the secondary formula treatment technology fortobacco leaves to form the tobacco leaves of the new grade, tobacco leaves are treated and reduced into the original tobacco bale packaging mode, the small-scale tobacco leaves become the small scalecomponent for the tobacco leaves of the new grade, the scale of the tobacco leaves of the single grade can be enlarged by 25-50 times, and therefore stable application of the tobacco leaves in the formula is ensured, the quality fluctuation caused by tobacco leaf adjustment is lowered, the product quality stability is improved, and the tobacco leaf usability is improved.

The invention discloses a method and a device for setting initial technological parameters of cigarette tobacco cutting and relates to the technical field of tobacco processing. The method comprises the following steps: a step of obtaining production parameters of a production batch to be processed, a step of determining a reference batch which is matched with the production batch to be processedin processed production batches according to a preset matching rule and based on production parameters, and a step of setting the initial technological parameters of the production batch to be processed according to the technological parameters of the reference batch. Via the method and the device for setting the initial technological parameters disclosed in the invention, a processed production batch which is maximally close to a current production state and of which production results maximally meet requirements is used as the reference batch, technological parameters are extracted and usedas initial technological parameters of the production batch to be processed, and production of material heads is started; switch to PID control is made after a target value to be processed is stable,and therefore rapid and stable control over material head time during processing operation can be realized; fluctuation of tobacco quality during the material head time can be reduced, and product quality can be improved.

The invention discloses a low-temperature industrial continuous catalytic cracking method and equipment for a waste organic polymer material. The method comprises the following steps: 1) carrying outearlier-stage treatment on a waste organic polymer material, 2) dehydrating and drying the waste organic polymer material, 3) carrying out a sectional catalytic cracking process on the waste high polymer material, 4) condensing and collecting cracking gas, 5) driving the melt material to move through an anti-coking heat-conducting medium, so that the heat and mass transfer effect is enhanced, 6) continuously discharging the pyrolysis carbon, 7) by non-condensable combustible gas generated by cracking supplies, heating the third-stage cracking reactor, 8) dividing the high-temperature flue gasinto three parts to be recycled, and discharging redundant parts through a tail gas treatment device, and 9) discharging tail gas. According to the invention, graded cracking of mixed waste organic polymer materials can be realized, cracked oil products are respectively recycled according to different decomposition temperatures of all the components, the maximum economic benefit of cracking products is realized, and the equipment is reasonable in structural design, can improve the production efficiency and realizes automatic production.

The invention relates to the technical field of prefabricated bridge deck slab preparation and discloses a coarse aggregate active powder concrete bridge deck slab production line. The coarse aggregate active powder concrete bridge deck slab production line comprises two parallel tracks fixed to the ground; a plurality of prefabricated slab molds are arranged on the ground between the two tracks;an automatic stirring station is arranged at the left end of the two tracks; an automatic distributor is arranged on a first portal sliding support; an automatic vibrator is arranged on a second portal sliding support; an automatic planer is arranged on a third portal sliding support; an automatic rolling film laminator is arranged on a fourth portal sliding support; a plurality of portal steel frameworks are arranged above the two tracks; the bottoms of the two ends of the portal steel frameworks are fixedly connected with the ground on the outer side of the two tracks; a material vehicle track is arranged in the middle of the portal steel frameworks; and a material vehicle is arranged at the bottom of the automatic stirring station. The prefabricated slab mold is fixed, the material vehicle, the automatic distributor, the automatic vibrator, the automatic planer and the automatic rolling film laminator move along the tracks, and preparation of large-size bridge deck slabs is achievedeasily.

The invention relates to a environment-friendly type denim special combined sizing agent used or sizing on the 7-32 warp threads for weaving denim, which comprises polyacrylic acids sizing agent, wax pieces, oxidized starch and acetic ester starch, according to the weight proportion of: oxidized starch 72-82 parts, acetic ester starch 10-20 parts, polyacrylic acids sizing agent 3 parts and wax pieces 5 parts. The method for preparing the sizing agent in the invention is: adding the oxidized starch, acetic ester starch, polyacrylic acids sizing agent and wax pieces into a mixing pot in order; mixing uniformly and obtaining the finished product. The invention replaces the PVA in prior art formula by acetic ester starch, consequently, achieves the advantages of environmental protection, reduce cost, easy preparation and stable quality.

The invention discloses a production process method for a rail spike, comprising the following steps of: (1) blanking; (2) heating; (3) pre-forging and forming in a pre-forging die; (4) final-forging and forming in a final-forging die, placing a Z-shaped or C-shaped blank in a corresponding final-forging die, and forging and forming under the pressure action of a press machine or a punch press; and (5) placing the finally-forged blank in a punching-blanking die, locating by the large ends of the spike heads of two products, and punching the two products under the pressure action of the punch press or a blanker to form a final product. In the invention, the pre-forging die, the final-forging die and the punching-blanking die are utilized; the middle blank and the final formed spike are formed in the dies, and the precision is greatly increased; the spikes of different batches have a less quality fluctuation and a more stable quality respectively; the production efficiency is greatly increased, the production cost is decreased, and the labour intensity of workers is decreased by utilizing a mechanized device.

The invention provides a production method of high-viscosity cotton pulp, which comprises the following steps: (a) pulping cotton linters, mixing the pulped cotton linters with steam and cooking liquor, and carrying out horizontal pipe continuous steaming to obtain cooked pulp, wherein the temperature of the horizontal pipe continuous steaming is 122 DEG C to 127 DEG C, the rotating speed is 1.5 r/min to 1.9 r/min, the time is 65 min to 100 min, and the pressure is 0.1 MPa to 0.18 MPa; (b) sequentially carrying out pulp extrusion, washing, impurity removal, previous refining, first desanding,first concentration, pre-acidification and chloridizing alkalization on the cooked pulp obtained in the step (a) to obtain to-be-bleached pulp; (c) bleaching the to-be-bleached pulp obtained in the step (b) to obtain bleached pulp; and (d) sequentially carrying out second desanding, second concentration, refining after bleaching, defibrination and papermaking on the bleached pulp obtained in the step (c) to obtain the high-viscosity cotton pulp. Compared with the prior art, the production method has the advantages that stable, reliable, continuous and rapid production of the high-viscosity cotton pulp can be realized, the obtained product meets the performance requirements of the high-viscosity cotton pulp 2600 product, and the quality fluctuation is small.

The invention discloses a preparation method for a double-sided light aluminum foil. The preparation method comprises the following steps that (1) cast-rolling is performed, wherein an aluminum alloymaterial and an aluminum ingot are put into a melting furnace for melting, after standing is performed through a standing furnace, a molten liquid is filtered, and a cast-rolled plate is obtained after multiple times of cast-rolling is performed by a cast-rolling machine; (2) cold rolling is performed, wherein the cast-rolled plate is cooled to room temperature, multiple times of cold pressing isperformed by a cold press, and then multiple times of annealing treatment is performed to obtain an aluminum foil stock; (3) an aluminum foil working procedure is performed, wherein the aluminum foilstock undergoes five passes of rolling working procedures to obtain a finished aluminum foil, the first pass of the rolling working procedure to the third time of the rolling working procedure are rough rolling, the thickness of the obtained aluminum foil is 0.03 mm, the fourth pass of the rolling working procedure is intermediate rolling, the thickness of the obtained aluminum foil is 0.014 mm, the fifth pass of rolling working procedure is finish rolling, and the aluminum foil with the thickness of 0.009 mm is obtained. According to the method, the distribution of reduction pass of an aluminum foil rolling working procedure is adjusted again, the pass reduction rate of the third pass is properly improved, the pass reduction rate of the fifth pass, namely, the pass reduction rate of the final pass is reduced, so that the reduction process speed is reduced, and the thickness of the product is reduced easier.

The invention discloses a forming mould for a flue gas exhausting pipeline, and the forming mould provided by the invention comprises a left side frame and a right side frame, wherein a plurality of external mould plates and internal mould plates, which are detachable, are arranged between the left side frame and the right side frame; an external mould cavity is defined by the plurality of external mould plates; an internal mould cavity is defined by the plurality of internal mould plates in the external mould cavity; forming cavities are formed between the external mould plates and internal mould plates; and a feed port is formed on at least one of the external mould plates. By using the forming mould provided by the invention, the mechanical mould production for a thin-wall flue gas exhausting pipeline can be realized, the problem that the mechanical production cannot be achieved in the field of forming of prefabricated noncircular thin-wall component is solved, the product is formed through one step, the production efficiency is increased, the labor intensity of a worker is reduced, places for production are greatly saved, the production process is supplemented by virtue of vibration molding, the product intensity and quality are high, and the quality fluctuation and the raw material waste which are caused by manual operation are reduced simultaneously.

The invention relates to a video coding method. The method comprises the following steps of: obtaining a forward video frame of the current video frame to be coded, obtaining corresponding evaluationinformation of the forward video frame in the current coding, determining a reference video slice corresponding to the current video frame, obtaining a reference video frame from the reference video slice, calculating and obtaining reference evaluation information corresponding to the current video frame according to the evaluation information corresponding to the reference video frame in the previous coding; obtaining an initial frame level quantization parameter corresponding to the current video frame in the current coding, and adjusting the initial frame-level quantization parameter according to the evaluation information corresponding to the forward video frame in the current coding and the reference evaluation information corresponding to the current video frame to obtain a target frame-level quantization parameter, and coding the current video frame according to the target frame-level quantization parameter. According to the video coding method, quality fluctuation at the jointis effectively reduced, and the video quality after video merging is improved. In addition, the invention also provides a video coding device, computer equipment and a storage medium.