251results about How to "Avoid excessive consumption" patented technology

A truck includes an auxiliary power unit having components specifically selected such that they form a stand-alone unit that can fit within an auxiliary compartment of a vehicle and deliver heating, cooling, and additional electric power to the vehicle. Included is an auxiliary engine, an auxiliary alternator, and an auxiliary condenser to provide coolant for a personnel compartment mounted evaporator. An auxiliary voltage regulator provides a ramp-up feature to minimize excessive start-up loads, limits maximum available current from the auxiliary alternator when the auxiliary compressor is engaged, and selectively disables power to electrical components in the event of low vehicle battery voltage. The auxiliary engine includes a radiator system to provide heated fluid for a personnel compartment mounted heat exchanger.

The invention discloses a data communication method of a wireless sensor network, which can solve the problems of the traditional cluster routing protocol that the energy consumption of the cluster head is high, and the network bottleneck can be easily formed, thereby making the energy consumption of nodes uneven and shortening the network lifetime. The data communication method comprises the following steps: providing a wireless sensor network topology; designing a method for establishing clusters in a network clustering process; defining gateway nodes used for receiving and transmitting data between adjacent clusters; designing a data transmission routing process, wherein a cluster head node is only responsible for finding a data transmission path, and actual data are transmitted along the found path through the gateway nodes, thereby realizing the separation of path finding and data transmission and reducing the load of the cluster head node; and designing an in-cluster routing method used for transmitting the data to a designated gateway node. The data communication method designed in the invention can effectively reduce the energy consumption, balance the network load, and prolong the lifetime of the network. Therefore, the data communication method is applicable to large-scale wireless sensor networks.

The invention relates to a composite type mercury ion adsorbent and a preparation method thereof. The adsorbent consists of chitosan, polyvinyl alcohol and clay. A polyvinyl alcohol macromolecular chain and a chitosan macromolecular chain are penetrated and wound mutually by high-speed stirring, so that the inorganic clay is dispersed fully; and the release of the chitosan and the polyvinyl alcohol in the process of using the adsorbent is avoided effectively by a method of combining cross linking agent cross linking and freezing crossing linking of glutaraldehyde. The adsorbent has high adsorption capacity and high adsorptive selectivity on Hg(II) ions, hardly adsorbs Cd(II) and Pb(II) ions, and adsorbs a small amount of Cu(II) ions, and can be recycled, and adsorbability of the adsorbentis slightly influenced by the pH value of a solution. The integral preparation process is performed in an aqueous solution, the preparation method is simple and convenient, low in energy consumption,low in production cost, environment-friendly, and easy to industrialize, and special process equipment is avoided.

The invention discloses a pomegranate-like structured composite material preparation method which comprises the following steps: S1, taking a polyacrylonitrile solution, adding silica nanoparticles, and fully dispersing; S2, adding deionized water after stirring for emulsification to obtain a mud like precursor; S3, heating the mud like precursor obtained in the S2, and annealing to obtain a solid composite; and S4, grinding the solid composite obtained in the S3 into micron particles, adding a hydrogen fluoride solution for corrosion for a certain period of time, washing hydrogen fluoride, and drying to obtain a pomegranate-like structured composite material. According to the method, polyacrylonitrile is used for coating the silica particle surface, the polyacrylonitrile is emulsified when meeting water, so that the coated silicon particles are agglomerated, the coated silicon particles are carbonized and ground for formation of the pomegranate shaped structured silicon carbon composite material, HF is used for direct corrosion of the silicon nanoparticles in the material for preparation of the hollow pomegranate-like structured composite material, and detailed structure characterization and electrochemical performance testing of the material show that the material is good in performances.

The invention provides a rendering method and device of a 3D skeletal animation. The rendering method comprises the following steps that an skeletal animation object is established and global skeletal matrix data which are generated in advance are loaded; the animation object is loaded, animation playing is conducted, skeletal matrix data needed by a current frame of the animation are obtained from the global skeletal matrix data and the skeletal matrix data are transmitted into a GPU; skeletal animation shader codes, an image object and model vertex data are obtained from the GPU, calculation is conducted according to the obtained skeletal matrix data, the obtained skeletal animation shader codes, the obtained image object and the obtained model vertex data, and a skeletal animation picture is rendered. The rendering method and device avoid the problem that in practical environment, CPU resource consumption is too high due to the fact the global matrix data are calculated through a CPU, effectively reduce the CPU occupancy rate and especially have obvious performance advantages for skeletal animation models which are complex and large in calculation amount.

The invention discloses a self-aligned split gate flash memory device. One unit structure comprises a polysilicon word line, a polysilicon floating gate and source polysilicon, wherein a first floating gate sidewall covers a top surface of the polysilicon floating gate and a first side surface of the polysilicon word line; a second floating gate sidewall is formed on the first side surface of the polysilicon floating gate; the first floating gate sidewalls and the second floating gate sidewalls of two adjacent unit structures define a forming region of the source polysilicon in a self-aligned manner and the width of the bottom of the source polysilicon is defined by each second floating gate sidewall in a self-aligned manner; a second floating gate sidewall material comprises a first oxide layer and a second oxide layer formed by CVD HTO; and the first oxide layer is formed by carrying out thermal oxidation on silicon on the first side surface of the polysilicon floating gate. The invention further discloses a manufacturing method of the self-aligned split gate flash memory device. According to the self-aligned split gate flash memory device and the manufacturing method thereof, the data retention capacity of the device can be improved and good control on the width of the bottom of the source polysilicon and the length of the polysilicon floating gate can be ensured.

The invention discloses a laser strapdown inertial navigation system comprising a human-machine interaction interface module, a dynamic trajectory generation, a sensor module, a software error model, sensor simulation excitation hardware module, and a laser inertial navigation computer electronic component. With the system provided by the invention, cost is effectively reduced, and excessive consumption caused by the purchasing of physical inertial sensors or an actual flight test or a flight simulation test during testing, adjusting, and performance evaluation of the strapdown inertial navigation system computer electronic component are avoided. The system has high versatility, and can simulate inertial sensors of various types, such that the performance of a strapdown inertial navigation system computer electronic component can be comprehensively verified.

The invention discloses a task distribution method and device, computer equipment and a storage medium. The task distribution method comprises the steps: obtaining the priority sequence of all serversin a server cluster, and screening a first server with the highest priority from the priority sequence; judging whether the resource occupancy rate of the first server is smaller than a preset resource occupancy rate threshold value or not; if not, sequentially traversing other servers except the first server according to the priority ranking, and judging whether the resource occupancy rate of the currently traversed server is smaller than a resource occupancy rate threshold value or not when each server is traversed; and if so, stopping traversing, and distributing the first task request tothe traversed server. According to the task distribution method, the received task requests are dynamically adjusted according to the priority ranking and resource use conditions of the servers, so that the task processing quantity among the servers is effectively balanced, and the processing efficiency of the first task request is ensured, and the utilization rate of each server is increased.

The invention relates to an environment-friendly and energy-saving sand mold casting process. The process comprises a first step of mixing metal sand and a binder uniformly to prepare metal molding sand; a second step of assembling a sand box and a mold and filling the metal molding sand until the sand box is full; a third step of firstly starting a vibrator to vibrate the sand box, then closing the vibrator and supplying power to an electromagnet so as to generate an electromagnetic force, wherein the electromagnet and the vibrator are arranged out of the sand box, at the same time hardening the metal molding sand to prepare the sand mold, removing the electromagnet or turning off electricity of the electromagnet when the hardening process is finished, pulling out the sand mold and coating high temperature-resistant coating on the surface of the sand mold to obtain the casting mold; and a fourth step of placing the casting mold between two magnetic poles of the electromagnet, turning on electricity for the electromagnet, pouring a metal liquid in the casting mold, forming a casting member when the metal liquid is cured, and performing sand shakeout and shot blasting treatment on the casting member when the casting mold is cooled down. With the process provided by the invention, pollutions to the production environment can be prevented, consumption of mineral resource is prevented, and at the same time, mechanical performance and size precision of the casting member can be increased significantly.

The invention belongs to the field of wireless communication, and is mainly applied to a wireless self-organizing network. On the premise of not increasing the network energy consumption, the throughput capacity of the whole routing path is effectively improved through maximizing the network throughput capacity of each hop of links. In order to reach the goal, a method provided by the invention adopts the technical scheme that according to a cooperation routing method for improving the wireless network throughput capacity, a source node transmits data to a target node through multiple hops, an emitting node of each hop of link firstly builds a non-cooperation shortest path route, and in addition, a candidate relay node set is built through a built route list and a neighbor node list; then, the link throughput capacity under the direct transmission, single-relay cooperation transmission and double-relay cooperation transmission is calculated, and the transmission mode corresponding to the maximum throughput capacity is selected in a self-adaptive way to be used as the transmission mode of the hop of link; and finally, the power is dynamically regulated according to the selected transmission mode, in addition, the data grouped transmission is carried out until the data of the source node is transmitted to the target node.

The invention discloses a gas extracting drilling solid-liquid two-phase hole sealing device. The gas extracting drilling solid-liquid two-phase hole sealing device comprises a first capsule bag, a second capsule bag, a third capsule bag, a primary grouting pipe and a secondary grouting pipe, a first hole sealing section is arranged between the first capsule bag and the second capsule bag, and a second hole sealing section is arranged between the second capsule bag and the third capsule bag; and an explosive valve located in the first hole sealing section is formed in the primary grouting pipe, the other end of the secondary grouting pipe is located in the second hole sealing section, and is in communication with the second hole sealing section through a second one-way valve. The inventiondiscloses a gas extracting drilling solid-liquid two-phase hole sealing technology at the same time, a network is connected to perform extracting after the first hole sealing section is subjected tosolid-phase hole sealing, periodic detection of gas extracting concentration is carried out to an extracting drilling hole of which the solid-phase extracting is completed, liquid-phase sealing of thesecond hole sealing section is perform on an extracting drilling hole with gas leakage, and then extracting can be continued. According to the gas extracting drilling solid-liquid two-phase hole sealing device and technology, liquid-phase hole sealing operation can be carried out to an extracting drilling hole with poor hole sealing and the gas leakage, periodic maintenance can be carried out tothe liquid sealing effect, and extracting drilling hole is prevented from densified cumbersome construction.

The invention discloses a molybdenum-doped ZnIn2S4 hollow hierarchical-structure photocatalyst applied to photocatalytic water splitting for hydrogen production, belonging to the field of photocatalyst preparation and application. According to the invention, molybdenum powder serves as a molybdenum source, and the molybdenum-doped ZnIn2S4 hollow hierarchical-structure photocatalyst is prepared through a one-step solvothermal method. The method does not use a template agent or a surfactant, is simplified in preparation steps, and avoids excessive consumption of raw material and energy; preparation process is simple, and the raw materials are widely available; and the efficient photocatalyst is designed, regulated and controlled from the two aspects of structure and composition, so the economic benefit of photocatalysis is expected to be remarkably improved, and the industrialization process of photocatalysis is promoted.

The invention relates to a method for separating olefin from coal-based fischer-tropsch synthesis light distillate oil. The method comprises the following steps of (1) conducting deacidification treatment on fischer-tropsch light distillate oil raw materials; (2) absorbing the deacidification-treated distillate oil to remove a carbonyl compound; (3) ensuring that the distillate oil after deacidification enters a de-lighting tower, a component with a carbon number less than n is separated from the top of the de-lighting tower, a bottom component enters a de-weighting tower, a component with a carbon number greater than n is taken off from the bottom of the de-weighting tower, and a component with a carbon number of n is separated from the top of the de-weighting tower; (4) ensuring that thecomponent of the carbon number of the n enters an extractive distillation tower and is in reverse contact with an extracting agent, a non-polar alkane is separated from the top of the tower, and theextracting agent and the target olefin are distilled from the bottom into a recovery tower; (5) ensuring that the target olefin is distilled off from the top of the recovery tower, and the extractingagent is distilled off from a tower kettle and recycled to the extractive distillation tower. Due to the preparation of the high carbon number olefin, and negative pressure distillation is used for preventing olefin cracking, which ensures the structural integrity of the olefin.

The present invention discloses an assisted implementation method and apparatus for pushing a playing object in a mobile terminal. The method comprises: according to a playing object played on each mobile terminal, constructing a user portrayal for each mobile terminal, and classifying the mobile terminal; and downloading a playing object played on a mobile terminal of the same kind of a target-online mobile terminal to the target-online mobile terminal, which is used for pushing, wherein the target-online mobile terminal is an online mobile terminal that uses non-cellular access technology to transmit data. The playing objects downloaded to the target-online mobile terminal are likely user preferred playing objects, with high possibility of being pushed. The playing objects have been downloaded in advance, so that the problem that the downloaded playing objects cannot be ensured intact as the objects are downloaded in fragmentary times if being pushed can be avoided. In addition, only if a mobile terminal uses non-cellular access technology to transmit data, a playing object will be downloaded on the mobile terminal, thereby avoiding the problem of excessive flow consumption.

The invention discloses an audio processing circuit for eliminating plug-in noise of an earphone and a line control earphone. In the earphone, audio transmission lines for transmitting left-channel audio signals and right-channel audio signals are respectively connected with a noise-suppression circuit; each noise-suppression circuit is internally provided with a blocking capacitor and a switching element, wherein one end of the blocking capacitor is connected with one audio transmission line, and the other end of the blocking capacitor is connected with the switching element. According to the audio processing circuit for eliminating the plug-in noise of the earphone, before and after the earphone is plugged in, the switching elements are switched off; when the earphone is plugged in, the imported suddenly-changed DC voltage is transmitted to the switching elements through the blocking capacitor, the switching elements are switched on, the audio transmission lines are grounded through switching paths of the switching elements, and then the output of the plug-in noise is blocked. The audio processing circuit for eliminating the plug-in noise of the earphone has the advantages that the design and structure are simple, and the cost is low; the noise generated when the earphone is plugged in can be completely eliminated. Therefore, the audio processing circuit disclosed by the invention is applied to the design of circuits for all existing four-section line control earphones.

The invention provides a marine floating garbage cleaning device including a buoyancy drum, a collecting drum, a cleaning mechanism, and a garbage detection mechanism. The cleaning mechanism includesa water pumping pipe and a lifting mechanism, and the garbage detection mechanism includes an infrared transmitting pipe, an infrared receiving pipe, a reflector, and a controller. When the device moves to the position of floating garbage, the floating garbage cuts infrared light reflected to the infrared receiving pipe by the reflector, the controller loses an electric signal emitted by the infrared receiving pipe, the controller controls the lifting mechanism to drive the water pumping pipe to descend, so that the lower end of the water pumping pipe is in contact with the water surface, thewater pumping pipe can transport the floating garbage to the collecting drum, and is prevented from wasting electric energy due to long-time continuous working, and the endurance time of the cleaningdevice can be prolonged.

The invention discloses a kitchen waste integrated processing method and equipment thereof. According to the method, kitchen waste is naturally filtered for the first time, and naturally filtered-out liquid is removed; the kitchen waste with high viscosity is squeezed and filtered through a screw for the second time, the liquid capable of being separated out through squeezing is separated out, and waste residues are obtained; the obtained waste residues and basal feed with adsorbability are mixed to form a mixture containing oil and water, and animal feed is obtained after drying and forming; and the naturally filtered-out liquid and the liquid separated out through squeezing are subjected to oil and water separation. The equipment comprises a machine frame, a pre-processing system and an oil and water separation system, wherein the pre-processing system and the oil and water separation system are arranged on the machine frame. The equipment is compact and ingenious in structure and small in size. When the kitchen waste is rapidly converted into the animal feed, high-degree dehydration before forming is not needed, proper oil and water in the residues are reserved, nutrition of the animal feed is improved, and excessive consumption of resources caused by high-degree dehydration is avoided. The processing equipment is simplified, the process steps are reduced, the process period is shortened, the cost is low, and the conversion efficiency is high.

The invention discloses a pseudo-ginseng inducible promoter R1 and application thereof, the nucleotide sequence of R1 is shown as SEQ ID NO: 1, and molecular biology and genetic engineering related technical researches prove that the pseudo-ginseng promoter R1 responds to several plant hormones, biological stress and abiotic stress; a fusion expression cassette constructed by the panax notoginseng promoter R1 and the beta-glucuronidase gene is transferred into tobacco for expression, and the activity of the glucuronidase of the transgenic tobacco is quantitatively detected through a fluorescence method. The result shows that after the transgenic tobacco is treated by fusarium oxysporum, fusarium solani, alternaria alternata, NaCl, AlCl3, gibberellin, methyl jasmonate, salicylic acid, abscisic acid and ethephon, the activity of glucuronidase is obviously enhanced; the pseudo-ginseng promoter R1 is induced by several plant hormones and biological and abiotic stress factors, and can be used for plant disease-resistant gene engineering.

The invention discloses a preparation method of ammonium bifluoride. The preparation method comprises the following steps of: with unsaturated ammonium fluoride solution with the mass percent concentration of 10-50% adopted, adding hydrofluoric acid with the mass percent concentration of 15-50%, and controlling reaction temperature to be 40-80 DEG C; after the reaction is finished, adding ammoniasolution with the mass percent concentration of 12-25% into a reaction system, reacting with excessive hydrofluoric acid, controlling reaction temperature to be below 30 DEG C, reacting for 40-90 minutes, concentrating ammonium bifluoride solution obtained in a three-opening bottle, then cooling and crystallizing, so as to obtain ammonium bifluoride crystals; and drying the ammonium bifluoride crystals, thus an ammonium bifluoride product is obtained. The invention has the beneficial effects that: compared with the prior art, process route is simple, conditions and requirements are unharsh, and realization is easy; the prepared ammonium bifluoride product has low moisture content and high purity, the product does not cake, energy consumption problem is noticed in a production process of ammonium bifluoride, and excessive consumption of energy source is avoided. By adopting the preparation method disclosed by the invention, fluorine resource is efficiently utilized, and the fluorine resource which enters into a system is finally converted into the ammonium bifluoride product. The preparation method disclosed by the invention has obvious economic benefit and is applicable to being popularized in fluorine chemical enterprises.

The invention discloses a bidirectional rotary welding clamp for a fork arm carrier of a forklift truck, which comprises a support frame, a welding clamp body, rotating wheels, a support plate, a cross bar, a cushion block and a rolling shaft, wherein the rotating wheels are respectively and movably fixed at two sides of the support frame; the left side and the right side of the support plate are respectively welded on the rotating wheels; the cross bar is fixedly arranged in the middle at the bottom part of the welding clamp body; one end of the rolling shaft is fixedly connected with the support plate; the other end of the rolling shaft sequentially penetrates through the cross bar and the cushion block; and the welding clamp body is movably fixed on the support frame. Therefore, the welding clamp body can be turned vertically and laterally. The bidirectional rotary welding clamp has the beneficial effects that the displacement of a circle at the upper, lower, left and right sides of the fork arm carrier of the forklift truck is realized by improvement on the structure, and thus the convenience for welding of welders is achieved and further the labor efficiency is improved and excessive consumption of physical strength is avoided.

The invention relates to a chitosan carbon steel restrainer, which comprises components that are more than one selected from hydroxypropyl chitosan and carboxymethyl chitosan. The use of chitosan carbon steel restrainer is that the restrainer can be added into cleaning solution to clean steel by immersion. The cleaning solution is acid liquor, the addition amount of the restrainer in the acid liquor is 0.001 to 3.0 g / L, and the immersion is performed at room temperature for 0.5 to 4 hours. The product of the invention is used for surface cleaning of carbon steel and carbon steel product and the method can prevent over metal etching and excessive acid liquor consumption during cleaning and has the outstanding advantages of low price, low dosage, high efficiency and high continuous acting force.

The application discloses a high temperature support plate self-locking nut processing technology in the mechanical technology field. The high temperature support plate self-locking nut processing technology includes concrete steps: (1) preparing material; (2) blanking; (3) stretching for forming: fixing a mold for high temperature alloy sheet material, pulling two ends of the mold according to shape of a product for repeated stretch forming, and adding lubricant between the mold and the high temperature alloy sheet material when necessary; (4) performing machining for fine trimming; (5) performing linear cutting; (6) performing thread tapping; (7) performing in-process inspection; (8) performing heat treatment: performing solid dissolution and aging treatment, wherein in solid dissolution, setting solid dissolution temperature at 900+ / -10DEG C, keeping solid dissolution time for 60min, and then adopting oil cooling; in aging treatment, setting aging temperature at 710+ / -10DEG C, keeping aging time for 15-17h, and then adopting air cooling; (9) blasting sand; (10) detecting fault; (11) performing surface treatment: plating silver on the surface of the high temperature alloy sheet material after being processed through the above steps; (12) inspecting. The high temperature support plate self-locking nut processing technology solves the problem that cutter consumption is high in production of support plate self-locking nuts in the prior art.

The invention discloses a carbon steel pickling corrosion inhibitor and application thereof. The carbon steel pickling corrosion inhibitor is used for preventing unnecessary corrosion and acid liquid consumption in a pickling process of carbon steel and products thereof. The corrosion inhibitor is one or a combination of antibiotic organic compounds such as ceftriaxone and amoxicillin. The application of the carbon steel pickling corrosion inhibitor comprises the following steps of: adding a 0.010 to 2.0 kg / m<3> cleaning agent into 0.10 to 1.0 kmol / m<3> dilute hydrochloric acid or dilute sulphuric acid serving as cleaning liquid; controlling the temperature to be about 25 DEG C; adding the carbon steel and the products thereof to be cleaned; and immersing for 30 minutes to 4 hours. The product of the invention is used for cleaning the surfaces of the carbon steel and the products thereof, can prevent the excessive corrosion of metals and the excessive consumption of acid liquid in a cleaning process, and has the outstanding advantages of low dosage, high efficiency and good continuous effect.

The invention discloses a lilium regale inducible promoter PR4 and application thereof, the nucleotide sequence of the PR4 is shown as SEQ ID NO: 1, and the lilium regale inducible promoter PR4 is proved to respond to several plant hormones and biological stress through molecular biology and genetic engineering related technical research; and a fusion expression cassette constructed by the lilium regale promoter PR4 and a beta-glucuronidase gene is transferred into tobacco for expression, and the glucuronidase activity of transgenic tobacco is quantitatively detected through a fluorescence method. Results show that after the transgenic tobacco is treated by methyl jasmonate, salicylic acid, fusarium oxysporum, alternaria alternata and fusarium chlamydosporum, the activity of glucosidase is obviously enhanced; therefore, the lilium regale promoter PR4 is a promoter induced by plant hormones and biological stress factors and can be used for plant disease-resistant gene engineering.

The invention discloses a lilium regale inducible promoter PD1 and application thereof, the nucleotide sequence of the inducible promoter PD1 is shown as SEQ ID NO:1, and the lilium regale inducible promoter PD1 is proved to respond to several plant hormones, biological stress and abiotic stress through molecular biology and genetic engineering related technical research; a fusion gene expression cassette constructed by the lilium regale promoter PD1 and a [beta]-glucuronidase gene is transferred into tobacco for expression, and the glucuronidase activity of transgenic tobacco is quantitatively detected through adoption of a fluorescence method. Results show that after the transgenic tobacco is treated by abscisic acid, salicylic acid, methyl jasmonate, gibberellin, ethephon, fusarium solani, injury stress and sodium chloride, the activity of glucosidase is obviously enhanced; and the inducible promoter PD1 disclosed by the invention has a wide application prospect in genetic engineering for resisting biological or abiotic stress.

The invention provides a homogenate coating method for negative lithium titanate. The method comprises the following steps: a, connecting a material storage box, a homogenate tank and a coating chamber into integrated homogenate coating equipment by virtue of a conveying pipeline; b, controlling the humidity in the material storage box and the homogenate tank to be in a range of 0-10% RH; c, adding a homogenate solvent and a negative electrode material into the material storage box, and controlling the humidity in the material storage box to be in a range of 0-10% RH; d, guiding the homogenate solvent and the negative electrode material into the homogenate tank for stirring; e, checking the solid content, viscosity and fineness of the homogenate, and preparing for discharging and coating; f, controlling the ambient humidity of the coating chamber to be 0-30% RH, starting to coat, and baking to obtain a negative plate coil. According to the homogenate coating method provided by the invention, a phenomenon that moisture in a lithium titanate homogenate absorbing environment is in a gel state in the homogenate coating process is eliminated, a gas expansion problem of a lithium titanate battery is reduced to a certain degree, and the electrical properties of the battery are improved.

The method for preventing computer network attack, belonging to the field of computer communication technology, includes the following steps: (1). intercepting data packet from exterior and recording source host information; (2). retransmitting the described data packet into the information-receiving host and setting timer; (3). if before time over, the respose message from information-receiving host is received, recording its identity information and coming into step 4; if the respose of information-receiving host is not received after time over, releasing identity information recorded by step 1; (4). using identity of source host recorded by step 1 to transfer respose message to information-receiving host, and according to the identity information of source host recorded by step 1 retransmitting respose message transferred into source host from information-receiving host and setting timer; (5) if, before time over, the respose message of source host is received, removing timer, the connection can be created sucessfully.

The invention provides a roof ecological heat preservation and waterproofing coiled material and belongs to the technical field of greening and environmental protection engineering. The roof ecological heat preservation and waterproofing coiled material orderly comprises an aluminized film layer, a foamed resin layer, a root inhibition layer and a bonding layer. The aluminized film layer is provided with multiple through holes with diameters of 1-2mm. One end surface of the foamed resin layer close to the aluminized film layer is provided with multiple loading grooves. The loading grooves arefilled with coated plant seeds and compound fertilizer. The coated plant seeds are prepared through coating plant seeds with a coating material. The coating material comprises, by weight, 10-15 partsof bentonite, 3-5 parts of ammonium molybdate, 1-2 parts of Emistim C, 8-12 parts of sodium alginate, 3-5 parts of an insecticide, 3-5 parts of a bactericide and 70-100 parts of water. The roof ecological heat preservation and waterproofing coiled material has a high plant seed germination rate. The plant has effects of greening, durst removal, heat preservation and heat insulation.

The invention discloses a charge and discharge protective circuit for a battery. The charge and discharge protective circuit comprises a battery, a charge circuit, a load circuit, an overvoltage protective circuit and an under-voltage protective circuit. The overvoltage protective circuit comprises an overvoltage reference voltage circuit, a first comparison circuit, an NAND gate and a first switch tube. The under-voltage protective circuit comprises an under-voltage reference voltage circuit, a second comparison circuit, an AND gate and a second switch tube. If the battery is overcharged, the voltage of the positive electrode of the battery is higher than the rated voltage of the battery, so the first comparison circuit outputs high level and the NAND gate outputs low level to cut off the first switch tube, the charge circuit stops charging the battery, and then the battery is prevented from being overly charged. If the load circuit excessively consumes electric energy of the battery, the voltage of the positive electrode of the battery is lower than the lowest under-voltage, so the second comparison circuit outputs low level and the AND gate outputs low level to cut off the second switch tube, the load circuit stops consuming the battery, and then an overvoltage and under-voltage effect is achieved.