614results about How to "Save resources" patented technology

The invention discloses a method of preparing aluminum oxide-silicon carbide compound porous ceramic by aluminum-silicon industrial waste residues. The primary raw materials comprise industrial waste residues, carbon powder, a pore forming substance and an adhesive. The aluminum oxide-silicon carbide compound porous ceramic is prepared by the following steps of mixing, drying, forming and sintering to obtain a final product. Treatment and high additional value utilization of the industrial waste residues are achieved. The prepared porous ceramic is remarkable in performance, and can be applied to the fields of filtration, sound isolation, heat isolation, fire fighting and the like. The method is simple in process flow and convenient for industrialized promotion; and the cost is good to control and the method has extreme economical value.

The inventive technique process of grainy calcium material for preventing and treating peanut blight primarily includes: adopting the shell powder and weathered coal as raw materials, machining into peanut blight prevention material through agglomeration granulation. The invention has innovative and reasonable design, which not only has simple process, easy implementing, but also has low cost of raw materials, product application convenience, remarkable peanut blight prevention effect, and capability of promoting high-efficient production pf peanut. In particular, the invention applies coastal oyster shell wastes for machining calcium materials for preventing and treating peanut blight, which not only reduces environmental pollution, but also promotes recycling of resources, has very significant economic, social and ecological benefits and greater promotional value.

The invention relates to an anorthite material and a preparation method thereof. The adopted technical proposal comprises the following steps of: according to (ZL200510019664.3) patent technology, namely a method for preparing titanium and a titanium alloy by utilizing titanium-containing furnace slag, taking molten tailings which is extracted with the titanium alloy as a raw material, adding 20 to 50 weight percent of silica, 0 to 60 weight percent of clay and 0 to 40 percent aedelforsite, and cooling a melt to obtain the anorthite material after the mixture is completely molten and a bath composition is uniform; or taking cold tailings extracted with the titanium alloy as the raw material, adding 20 to 50 weight percent of the silica, 0 to 60 weight percent of the clay and 0 to 40 percent the aedelforsite, carrying out mix grinding on the raw material and the admixture until the particle size is less than 0.1 mm, performing blank compression, and calcining the mixture at a temperature of between 1,200 and 1,400 DEG C to obtain the anorthite material. The method takes the tailings extracted with the titanium as the raw material, saves precious bauxite resources, has low cost, ensures that industrial residue is utilized with high added value, is environment-friendly and has simple process.

The invention discloses a key value storage system indexing method oriented to an NVM-NVMe SSD (Non-Volatile Memory-Non-Volatile Memory Express Solid State Disk) hybrid architecture, which comprises the following steps of: constructing a heterogeneous storage architecture taking cold and hot data perception as a core driving mechanism, coordinating and managing two types of storage media, namely a non-volatile memory NVM and a solid state disk NVMe SSD, and realizing efficient identification, layered writing and dynamic migration of cold and hot data. According to the method, the characteristics of low delay, durability and byte addressing of the NVM are utilized, the frequency and I / O overhead of Flush and Compaction operations are reduced in a data write-in path, meanwhile, the problem of mixed storage of cold and hot data is avoided, and therefore the overall performance and storage efficiency of a system are remarkably improved. In addition, by introducing an asynchronous migration module, the method can dynamically adapt to the change of data popularity along with time evolution, and effectively support high performance and high availability of the key value system in long-term operation.

The invention discloses a self-calibration and drift compensation method for an automatic underground water monitoring station, and the method comprises the following steps: 1, transmitting a reference measurement starting instruction to an underground bubble method device by an edge calculation gateway, forming a reference data pair by a bubble method water level reference value and a reference acquisition moment, and writing the reference data pair into a reference data cache region; 2, the edge computing gateway creates a state storage structure and a covariance storage structure; and step 3, the edge computing gateway reads a drift amount estimation value from the state storage structure as a drift compensation amount, and when a drift estimation standard deviation exceeds a set threshold, bubble method hardware reference acquisition is triggered. According to the invention, the problems of high manual calibration cost and lack of independent reference support in pure software estimation in the prior art are solved, so that a monitoring station can stably operate for a long time under an unattended condition and continuously output high-precision underground water level monitoring data.

The invention discloses a large model reasoning hardware accelerator based on data flow execution, and belongs to the technical field of large model reasoning hardware acceleration. Each node comprises a linear calculation kernel used for sequentially completing query / key / value projection and attention output projection in multi-head attention calculation, dimension raising projection and dimension reduction projection calculation in a feedforward neural network layer, and inverse quantization operation after each projection is output; the multi-head attention calculation kernel is used for completing loading and quantization of query / key / value vectors, multi-head division and cache management, attention score calculation, Softmax normalization, context vector generation and KV cache updating; the RLA kernel is used for completing residual addition, layer normalization, quantization / inverse quantization and nonlinear activation calculation of each layer; the three cores in the same node are located in the same SLR area, and data transmission is carried out through a hardware queue and an HLS blocking mechanism. According to the invention, high hardware utilization rate and low-delay reasoning can be realized.

The invention provides a neural network multi-objective optimization and FPGA hardware acceleration collaborative design method, and belongs to the field of deep learning model compression and hardware collaborative design. The method comprises the following steps: constructing a joint optimization space containing a neural network compression parameter and an FPGA hardware design parameter; a multi-target Bayesian optimization search strategy is adopted, iterative search is carried out in the joint optimization space, model precision, FPGA resource occupation and reasoning delay are synchronously optimized, and optimal candidate configuration is obtained; matching the compressed network structure with the FPGA parallel architecture by using a hardware-perceived pruning and quantification strategy; a multi-task performance prediction model is adopted to quickly predict the precision, resource occupation and delay of the optimal candidate configuration so as to accelerate the search process; according to the optimal configuration, a hardware accelerator code facing the target FPGA is automatically generated, and integration and implementation are completed. According to the method, collaborative optimization of neural network compression and hardware design is achieved, FPGA resource occupation can be remarkably reduced, the reasoning speed can be increased, and meanwhile the model precision is kept.

The application relates to the technical field of image processing, and provides a model material replacement method and device for a design drawing. The method comprises the following steps: determining a target model from each model of a design drawing according to a received material selection instruction; obtaining a target material map corresponding to the material selection instruction from each material map of the target model; and merging the target material map, a light map, a diffuse reflection map and a reflection refraction map of the design drawing to obtain a model image of the target model in the design drawing; wherein the design drawing is an image obtained through rendering; the light map, the diffuse reflection map and the reflection refraction map are each layer obtained after the design drawing is rendered. The model material replacement method for the design drawing provided by the application can reduce the calculation amount of the model in the design drawing when the material is replaced, and reduce the resources consumed when the model material is replaced.

The application discloses a kind of carbon dioxide methyl ester raw gas purification filter pollution devices, it includes horizontally arranged cylinder, coaxial tower type ladder filter assembly and translation pneumatic purging assembly are arranged in the cylinder, the tower type ladder filter assembly includes several end face filter parts and cylinder filter parts that are alternately connected in sequence;The beneficial effects of the application: the tower type ladder filter assembly of the application is designed to filter carbon dioxide methyl ester raw gas, the tower structure can effectively increase the filter area, thereby improving the filtering efficiency;Tower type ladder filter assembly has matching end face filter parts and cylinder filter parts, with axial airflow and radial airflow filtering function, according to the gas direction to axial filtration as main, radial filtration as auxiliary, long service life;According to the actual use characteristics of end face filter parts and cylinder filter parts, design translation pneumatic purging assembly and spray cleaning assembly to clean tower type ladder filter assembly, cleaning is fast and efficient.

The invention relates to an intelligent scheduling system and method for security and protection video streams of an intelligent television. The intelligent scheduling system comprises a user, an Android TV client (TV client for short), a Web signaling server, a Relay proxy server and a camera. The user interacts with the TV client through an input device of the remote controller and initiates a watching instruction; the TV client is used for receiving a user instruction, performing signaling interaction with the Web signaling server, and establishing video stream connection with the camera or the Relay proxy server; the Web signaling server is used as a control center of the system and is used for receiving a request of the client, carrying out intelligent scheduling decision making and issuing a control instruction to the downstream camera and the client; the Relay proxy server serves as a video stream transfer node and is used for forwarding video stream data when P2P direct connection is unavailable; and the camera is used for collecting a video stream and pushing the video stream to the TV client or the Relay proxy server according to an instruction of the Web signaling server.

This invention relates to the field of prefabricated structure technology for energy storage power stations, specifically to a prefabricated foundation structure for an energy storage power station equipment compartment, its design, and construction method. The foundation structure includes prefabricated corbel columns, prefabricated connecting beams, and connecting components. Multiple sets of prefabricated corbel columns are arranged in an array at intervals. Prefabricated connecting beams are provided between adjacent sets of prefabricated corbel columns, and these beams are connected to the prefabricated corbel columns via connecting components. The prefabricated foundation structure for an energy storage power station equipment compartment provided by this invention can significantly shorten the construction cycle and reduce construction costs. By standardizing the production of prefabricated components in a factory, on-site casting work is reduced, avoiding time-consuming processes such as traditional on-site casting formwork and curing, improving construction efficiency and quality stability, and reducing the difficulty of quality control. Furthermore, compared to traditional on-site cast-in-place foundations, this solution can reduce on-site material waste, avoid dust and noise pollution and construction waste accumulation, saving resources and being environmentally friendly.

The application provides an RGB-based self-adaptive translation flat display picture method and system. By writing the horizontal and pitching deviation into a memory, combining the layout characteristics of the flat display picture, and adjusting the position of the starting point of the distortion correction based on the FPGA, the self-adaptive compensation of the flat display part machining and assembly error is realized without increasing the operation amount and the delay, and the translation process correctness monitoring is performed. The application can be applied to the compensation of the machining and assembly error of the large field of view digital flat display, increases the margin of the flat display part machining and assembly, and further reduces the cost.

The invention relates to a catalytic hydrolysis method of waste epoxy resin, which comprises the following steps: putting the waste epoxy resin into a reaction kettle, adding ultrapure water, adding a small amount of sodium dodecyl diphenyl ether disulfonate surfactant and a boron trifluoride acetic acid catalyst, and carrying out hydrolysis reaction to realize catalytic degradation of the epoxy resin. Degradation products can be converted into epoxy monomers and anhydride monomers, so that cyclic utilization is realized. Compared with the prior art, the degradation method provided by the invention is not only green and safe, but also high in degradation efficiency, solves the problem that the waste epoxy resin cannot be recycled, saves resources, meets the green development requirement, and has practical engineering application value.

The utility model discloses a kind of high pressure resistance carton, belong to carton technical field.A kind of high pressure resistance carton, including the box made of paperboard, it is characterized in that, the paperboard includes face paper, first corrugated paper, second corrugated paper, lining paper and reinforcing column, the face paper inside is connected with the first corrugated paper, the side of the first corrugated paper away from the face paper is connected with the second corrugated paper, the second corrugated paper side away from the first corrugated paper is connected with lining paper;The cavity for embedding the reinforcing column is formed between the first corrugated paper and the second corrugated paper.Simultaneously due to adopting multilayer corrugated paper adhesion and embedding reinforcing column, in the case where each paper layer thickness is not increased, compression resistance is improved, and embedded reinforcing column can be taken out after use to wait for next cycle use, reduce production cost, while, resource is saved.

This utility model discloses a solid-liquid separation diatomaceous earth filtration system, relating to the field of filtration technology. It includes: a coating tank for storing a liquid mixed with diatomaceous earth, a coating circulation pipeline, and a raw liquid tank, a delivery pump, a filter cartridge, and a purified liquid tank connected in sequence. The filter cartridge is vertically arranged inside the cartridge. A drain port and a liquid inlet pipeline are provided at the bottom of the cartridge, and an outlet pipeline and a cleaning pipeline, both connected to the filter cartridge, are provided at the top. A drain valve is provided at the drain port. The top of the inner cavity of the cartridge is connected to a first air supply pipeline, and the bottom of the inner cavity is connected to a pressure return pipeline. The bottom of the coating tank is connected to the liquid inlet channel of the cartridge via a circulation pump. One end of the coating circulation pipeline is located inside the coating tank, and the other end is connected to the filter cartridge. In this utility model, the filter cartridge is coated with soil using the coating tank. Gas supplied through the first air supply pipeline forces the raw liquid inside the cartridge into the pressure return pipeline, saving raw liquid resources and improving the regeneration effect of the filter cartridge.

The utility model discloses a kind of vacuum cooling water recycling equipment, belong to cooling water circulation technical field, comprising: first support, second support, vacuum pump, primary filter, sedimentation tank, backwater tank, backwater filter device, the first support top is installation platform;The second support is set in first support side, top is filter platform;The vacuum pump is set on installation platform, inlet pipe, backwater pipe are set on the vacuum pump;The primary filter is set on filter platform, with vacuum pump, push out production host computer connection, below setting liquid outlet;The sedimentation tank is set in second support bottom;The backwater tank is set in first support, second support outside, between by water pipe connection, backwater pipe is connected in the middle of the water pipe;The backwater filter device is set in backwater tank outside.The utility model cooling water recycling, save resources, reduce cost, vacuum pump takes away impurity in push out host computer, improves production stability.

The utility model discloses a kind of copper-clad plate cleaning equipment, its structure includes cleaning tank and rotating roller, copper-clad plate is placed into the inside of cleaning tank by import and export, in the first motor drives transmission rod so that in after driving gear and transmission gear lower rotating roller rotation pushes copper-clad plate to move, in moving to the bottom nozzle and top nozzle set up, water pump works so that spraying treatment is carried out to the upper and lower two end surfaces of copper-clad plate, and in the rotating of cleaning brush roller set up up and down, the surface of copper-clad plate is cleaned, to clean the surface of copper-clad plate, the upper and lower two end surfaces are cleaned, so that cleaning efficiency is higher, avoid the case that single face cleaning efficiency is low, and under the action of bottom adsorption roller and top adsorption roller, liquid on the surface of copper-clad plate is adsorbed, reduce the existence of surface liquid, so that subsequent surface drying efficiency is faster.

The application discloses a kind of purification equipment of ultra-high purity quartz sand and its purification method, including immersion washing tank, the rotating drum is equipped in the immersion washing tank, the rotating drum is opened with door, motor is fixed on the immersion washing tank side plate on rotating drum side, the output shaft of motor is fixedly connected with the side of rotating drum and the side of immersion washing tank, the sealing upper plate is slidably connected on the immersion washing tank;By immersion washing tank, it can realize soaking cleaning and spraying effect by rotating drum, and double purification is carried out on quartz sand;By immersion washing tank, mixing box and sedimentation tank, acid liquid circulation is realized, resource is saved, and purification cost is reduced;By heating pipe on sealing upper plate and the PH tester that is equipped in the inside of immersion washing tank, mixing box and sedimentation tank, the temperature and PH value of acid can be effectively controlled, so that the concentration and PH value of acid always meet the requirement of quartz sand purification, temperature and concentration are strictly controlled, and high-purity purification of quartz sand is realized.

This utility model relates to the field of atomization spray technology, specifically an atomization spray precision control device. The device includes an atomizer with a side-hollow structure. A baffle plate is located inside the atomizer, and a transmission groove is formed within the atomizer. A connecting rod is fixedly connected to the top of the baffle plate. The top of the connecting rod extends into the transmission groove and is fixedly connected to a gear. A threaded rod is rotatably connected inside the transmission groove. A sliding block is threadedly connected to the external thread of the threaded rod, and another sliding block is threadedly connected to its external thread. A rack is fixedly connected to the bottom of the sliding block. A limit rail is fixedly connected to the top of the inner wall of the transmission groove. The advantages of this utility model are that it ensures uniform drug particle size, enabling precise deposition in the respiratory tract and lungs, improving drug absorption efficiency, optimizing drug distribution, avoiding excessively high or low local drug concentrations, enhancing therapeutic effects, and reducing side effects. Compared to traditional devices, it significantly improves operational quality and efficiency.

The application relates to a four-branch waterproof cable which comprises an outer sleeve, a main cable body arranged in the inner part of the outer sleeve, a first branch cable body arranged at one end of the main cable body, a second branch cable body arranged at the end of the first branch cable body away from the main cable body, four groups of first fixing ring blocks fixedly connected on a round plug, second fixing ring blocks detachably arranged in the first fixing ring blocks, the second fixing ring blocks being sleeved on the second branch cable body, and sealing structures arranged between the first fixing ring blocks and the second fixing ring blocks. The application can realize the quick disassembly of the main cable body, the first branch cable body and the second branch cable body, can replace cables with different lengths, can not damage the main cable body, the first branch cable body and the second branch cable body when the main cable body, the first branch cable body and the second branch cable body are separated, can be repeatedly used, can save resources, and can realize good sealing effect and good waterproof performance at the installation connection part of the main cable body and the second branch cable body.

A method and apparatus for paging restrictions in a wireless communication system are provided. A wireless device receives a paging configuration from a network, wherein the paging configuration includes information related to a plurality of sets of paging parameters, and wherein each set of paging parameters is associated with at least one paging occasion. The wireless device receives information related to a particular set of paging parameters from among the plurality of sets from the network. The wireless device monitors a particular paging occasion based on the particular set of paging parameters.

The invention provides an RSU holographic traffic flow analysis method and system based on edge computing, and the method comprises the steps: enabling an RSU to control a visible light collection device, a laser radar device and an ETC read-write device to synchronously carry out data collection through unified clock triggering and interface cooperation, and obtaining an original perception data set; processing a traffic flow change area in the set based on radiation field data of an edge side neural radiation field multiplexing historical stable area to obtain change area radiation field data, extracting image semantic information, point cloud geometric information and ETC time sequence information, and performing space-time dimension association integration on the three types of information and the change area radiation field data to obtain a traffic flow change area radiation field data set; the to-be-corrected radiation field data is obtained, and after filling and correction, complete radiation field data subjected to cross-type information complementary optimization is obtained; and performing three-dimensional scene reconstruction, and outputting real-time holographic traffic flow data. According to the invention, the accuracy and continuity of the traffic flow data can be improved.

The embodiment of the invention provides a virtual machine application program upgrading system, a system deployment method and an upgrading method. The system comprises an upgrading server, a virtualization management platform and a virtual machine, the upgrading server is independently deployed by the virtualization management platform in a cluster deployment or non-cluster deployment manner according to the scale of the virtual machine to be upgraded, and is used for providing an upgrading service for the virtual machine under at least one virtualization management platform; the virtualization management platform is used for managing the upgrade server through network communication; a client program for upgrading is installed in the virtual machine, and the client program and the upgrading server realize upgrading of the application program of the virtual machine through network communication. According to the scheme of the embodiment, the upgrading server can adapt to scenes of different virtual machine scales, virtual machine application program upgrading across virtualization platforms is achieved, more resources are saved, equipment maintenance is facilitated, and a virtual machine application program upgrading solution can be provided under the scene that a virtual machine CD driver cannot be used.

A method performed by a wireless device (130) is described herein. The wireless device (130) operates in a wireless communications network (100). The wireless device (130) provides (602) a message to be sent to a network node (110) operating in the wireless communications network (100). The message is a first scheduled message to be sent to the network node (110) in a random access procedure. The message comprises a first indicator (707) of a type of the message. The type of message has: a) a fixed size SDU (702), and b) a one byte header (704) comprising the first indicator (707) and lacking a second indicator (713) of a length of a payload. The wireless device (130) also initiates sending (603) the provided message to the network node (110). Also described is a method performed by the network node (110) receiving (1307) and initiating processing (1302) the message, based on the first indicator (707).

This utility model discloses a modular waterproof power strip, relating to the field of power strip technology. It includes a housing with two sets of symmetrical fixing rods on its outer surface. A protective shell is mounted on the outer surface of each fixing rod, and the fixing rods are used to position the protective shell. A sleeve is provided at the inner end of the housing to protect the wiring channel, and a sealing and waterproofing mechanism is provided on the outer surface of the sleeve. This modular waterproof power strip, through the cooperation of the protective mechanism and the protective shell, protects the plug, thereby increasing the sealing effect of the device and preventing dust and water from entering the plug, which could lead to short circuits and damage. This increases the reliability of the device. The cooperation of the protective shell and fixing rods further protects the housing, reducing damage and extending its service life. Furthermore, when the protective shell is damaged, it can be easily replaced by disassembly, reducing costs and saving resources.

The application discloses a filter core uniform filtering structure applied to an air purifier, which comprises a purifier body, a replaceable air filter core is arranged in the purifier body, a wind guide sleeve ring capable of moving up and down is arranged on the outer wall of the replaceable air filter core, a reciprocating driving assembly capable of driving the wind guide sleeve ring to move up and down reciprocatingly is arranged in the replaceable air filter core, the wind guide sleeve ring can control the path of air flow, the wind guide sleeve ring moves up and down reciprocatingly on the outer surface of the filter core, air molecules penetrate into different surface positions of the filter core, and filtering is more uniform; meanwhile, flowing air is used as power to make the reciprocating driving mechanism work automatically, drive the wind guide sleeve ring to move up and down reciprocatingly automatically, and a damping structure is arranged to prevent the wind guide sleeve ring from exceeding the maximum moving speed range due to too large air flow speed, improve the stability of work, improve the quality of air filtering and save resources.

The application relates to the technical field of semiconductor nanomaterials, and discloses an environment-friendly zinc sulfide nanoparticle as well as a preparation method and application of the zinc sulfide nanoparticle. The preparation method comprises the following steps: (1) activating Aspergillus oryzae spores, performing liquid fermentation, filtering the liquid fermentation product, washing, collecting solid substances, and obtaining biomass; (2) culturing the biomass in the step (1) in a ZnSO4.7H2O aqueous solution to obtain an Aspergillus oryzae liquid solution containing zinc sulfide nanoparticles; (3) drying the liquid solution obtained in the step (2) to obtain Aspergillus oryzae precipitate containing zinc sulfide nanoparticles; and (4) heating the precipitate in the step (3) at 400-450 DEG C for 4-6 h to obtain zinc sulfide nanoparticles. The application endows the zinc sulfide nanoparticles with excellent biocompatibility, expands the application of the zinc sulfide nanoparticles in the fields of biomedicine, chemical sensors, solar cells and light-emitting diodes, and provides a reference for the environment-friendly and batch production of the zinc sulfide nanoparticles.

This invention discloses a control method and a wireless communication circuit. The control method includes: a processing module acquiring current channel status information of the current operating channels corresponding to at least two communication paths, and sending the current channel status information to a co-frequency coexistence confirmation module; the co-frequency coexistence confirmation module confirming the channel status between each pair of current operating channels based on the current channel status information; and, if the channel status between each pair of current operating channels satisfies a first channel status, the processing module performing a channel reallocation operation on the current operating channels of the communication paths to obtain target operating channels corresponding to each communication path, wherein the channel status between each pair of target operating channels satisfies a second channel status. This invention enables wireless communication systems to reduce co-frequency interference while communication paths operating in the same frequency band are working simultaneously, thus ensuring communication quality and efficiency.

The present application relates to the technical field of sludge treatment, in particular to a sludge suction dredging device for landscaping and a using method thereof. The device comprises a suction machine and a chassis connected with the liquid inlet end of the suction machine, the inside of the chassis is provided with a suction port assembly for regulating the size of the liquid inlet, the suction port assembly at least comprises two symmetrical elastic rods fixedly connected with the inner wall of the chassis, and the opposite ends of the two elastic rods are rotatably connected with a disturbance plate, the two symmetrical disturbance plates are rotatably arranged in the inside of the chassis, the compression and rebound force generated in the inside of the elastic rod resists the "eight" shape formed by the rotation of the surface of the two symmetrical disturbance plates, so that the flow rate of the sludge is accelerated when the sludge passes through the liquid inlet, and the impact force generated when the sludge enters the liquid inlet opened in the side wall of the chassis is buffered, the rotation shaft of the disturbance plate is connected with an auxiliary disturbance assembly, the elastic rod slides in the inside of the chassis, pushes the disturbance plate to rotate in the inside of the chassis, and regulates the size of the liquid inlet of the chassis.

The utility model discloses a track and pulley assembly structure of an electric curtain, which relates to the technical field of electric curtains and comprises a track body and a pulley piece, a pair of guide rails is mounted in the track body, and the pulley piece comprises a moving shaft arranged in the track body. Rollers matched with the guide rails are rotationally mounted at the two ends of the moving shaft, a sleeve shell fixedly sleeves the middle of the moving shaft, and a hook is fixedly connected to the lower end of the sleeve shell; lubricating mechanisms are arranged on the two sides of the top of the guide rail and comprise oil boxes fixedly installed on the top of the guide rail. The lubricating mechanism is arranged at the top of the guide rail, the oil control piece is triggered through rolling of the roller, lubricating oil can be automatically released into the guide rail, the self-lubricating effect on the guide rail and the roller is achieved every time the curtain is opened and closed, friction and abrasion between the guide rail and the roller are effectively reduced, and the opening and closing smoothness of the curtain is guaranteed; and the service life of equipment is prolonged.