34 results about "Secondary loss" patented technology

A high-lift airfoil embodying a combination of loading conventions in a single design specifically to reduce and control total pressure losses that occur in the flow channels between airfoils employed in turbomachinery applications is disclosed herein. The mixed-loading high-lift airfoil designs embody and exhibit the best total profile and secondary loss characteristics possessed by both aft-loaded airfoil and front-loaded airfoil conventions through controlling the development and interaction of boundary layers forming along the surfaces of the airfoils and the endwalls in such applications. The mixed-loading high-lift airfoil may be utilized in both rotating and non-rotating turbomachinery applications.

The invention discloses a self-destruction method of an intelligent terminal. According to the method, the intelligent terminal calculates a distance from the intelligent terminal itself to a server end according to a progressive increase variable self-destruct inquiry period and judges whether the intelligent terminal needs to perform self-destruction; and when the intelligent terminal needs to perform self-destruction, the intelligent terminal reads a data list which is preset by a user and requires backup, and packs user data according to the data list, and sends the packed data to the server end through a network, so that the server end can back up the data, and then, the intelligent terminal executes self-destruction operation. With the method of the invention adopted, the security of the user data can be protected; the risk of the leakage of the privacy data of a user can be eliminated; important data of the user will not be lost because of the self-destruction of the intelligent terminal; secondary loss brought to the user due to data loss can be alleviated; and the progressive increase variable self-destruct inquiry period is adopted, and therefore, the energy consumption of the intelligent terminal can be decreased, and the standby time of the device can be prolonged.

The invention discloses a coding transmission method for medium cloud video data. The coding transmission method for the medium cloud video data comprises the following steps that real-time monitoring is conducted on the bandwidth of a transmission network on an original video data output terminal, lossless compression is conducted on the original video data according to a monitoring result combined with the computing power of the original video data output terminal, the coding complexity of lossless compression is controlled, lossless compression video data are obtained, and the lossless compression video data are uploaded to a cloud server through the network; the cloud server decodes the lossless compression video data, so that an original video signal is restored, secondary loss compression is conducted, and the coding complexity of the loss compression is controlled; finally, the cloud server stores loss compression video data or distributes the loss compression video data to request users. The coding transmission method for the medium cloud video data equivalently utilizes the computing power of a user side, limited transmission network bandwidth resources and the cloud server to the maximum extent so that the problems that transmission from the user side to a cloud side is slow and the calculation amount is large can be solved.

The invention relates to a subsonic rotor and/or stator blade profile of an axial turbomachine compressor, such as a turbojet. The blade has a leading edge with an S-shaped lateral profile in its mid-plane. Specifically, the profile includes, from its inner end to the outer end, a first convex portion including the foremost part of the blade, and a second concave portion including the rearmost area of the blade. This profile enables the fluid flow between 20% and 80% of the blade's length to be redistributed. This so-called 'sweep' profile increases the performance of the stage with such blades because it reduces blade tip vortex losses as well as secondary losses.

The invention discloses a method for manufacturing reclaimed soil with iron tailings; the method comprises: collecting iron tailings, quaternary-system secondary losses and organic material respectively, and getting ready for use; mixing well the iron tailings, the quaternary-system secondary losses and the organic materials according to a mass ratio of (45-55):(40-50):5 to obtain reclaimed soil; the organic material is decomposed waste of livestock and poultry industry or composed sludge discharged by urban domestic sewage plants. According to the method for manufacturing reclaimed soil with iron tailings, the iron tails, sludge and livestock and poultry industry waste are used as materials to manufacture reclaimed soil, a mine can be greened, and the wastes such as iron tailings and sludge are utilized comprehensively, the usage of land resources is reduced, and the environment is protected.

The invention discloses a method for preparing a high-efficacy super capacitor material by a heavy metal related biomass, and aims at searching for a proper resource for heavy metal related plant bodies at present. Plant bodies rich in heavy metal in a general mine are sampled (in a five-point sampling method), the collected plant bodies (including the roots, stems and leaves) are preprocessed bycleaning, drying crushing and drying, and a preparation method for obtaining the high-efficiency porous carbon material by dissolving, activating, and pyrolyzing the dried plant leaf powder is provided. The heavy metal transferred by plants can be fixed, and the material can serve as an electrode material of a super capacitor to store energy. The difficulty in secondary loss of the transferred heavy metal is overcome, the new capacitor material is provided for energy storage, solid waste biomass resources are utilized, and the problem in heavy metal related plant resources is solved effectively.

The invention provides a heavy metal aggregating fixative for soil remediation and a preparation method thereof. The heavy metal aggregating fixative for the soil remediation is obtained by grinding and refining raw materials rich in plant protein, and expanding after drying, and preparing with phosphate and calcium dioxide and granulating according to a certain proportion. The heavy metal aggregating fixative for the soil remediation has the obvious characteristics that after phosphate and calcium hydroxide collect heavy metal ions, large-particle protein materials are used and protein functional groups are preferentially combined with the heavy metal ions after the large-particle protein materials are expanded, the heavy metal ions and a protein spatial structure react to form a large aggregate, eventually, a tubercular substance is formed, so that heavy metal is fixed in the protein materials in the form of large particles to permanently fix the heavy metal ions in soil, and the process is irreversible, namely the heavy metal ions which are fixed by the way are no longer likely to have secondary loss basically.

The invention discloses a separating speed adjustable type circulating grain drying machine which comprises a grain storing cabin, a feeding hoister, a feeding hopper hoister and a drying system, wherein the feeding hoister and the feeding hopper hoister are mounted on two sides of a grain storing cabin base; the drying system is mounted below the feeding hopper hoister and comprises a fixed rack,a feeding elephant trunk, a discharging elephant trunk, a hot-blast air inlet connecting pipe, an air outlet pipe, a fixed coaming and a drying device; the fixed coaming is mounted around the dryingdevice; the drying device comprises a driving motor, a driving sprocket, a pulling chain, a porous screen plate and a heat-resisting rubber flexible plate; and grain in the grain storing cabin is controlled by a discharging gate to enter the feeding hopper hoister, enters into the drying device to be dried on the drying system via a feeding pipe, is conveyed to the discharging elephant trunk to bedischarged, and enters the grain storing cabin via a grain feeding pipe through the feeding hoister. According to the technical scheme, the separating speed adjustable type circulating grain drying machine is simple in structure and safe and reliable; a grain storing layer, a drying layer and a transportation device are designed in a separating manner, so that secondary loss of grain is avoided;and the separating speed adjustable type circulating grain drying machine is convenient in mounting and overhaul and uniform in heating, improves the drying quality and reduces energy consumption andfailure rate.

The invention relates to the technical field of machinery, in particular to a speed reducer, comprising a first gear, a second gear and a power chain, and the first gear, the second gear and the power chain form an integrated transmission structure. The invention is equipped with a plurality of gears and transmission chains with different diameters, and the transmission is carried out through the transmission chain, the transmission noise is small, the speed is controlled by detecting the transmission ratio, the deceleration ratio is controlled with high precision, and high-strength low-carbon alloy steel and high-strength alloy steel are used. Made of molecular materials, it has strong concession and avoids secondary loss of the machine.

The invention discloses a metal workpiece surface reduction device and method. The device comprises an inlet section, a spare part section furnace body, a heating section furnace body, a cooling section furnace body and an outlet section. The inlet section is installed above the spare part section furnace body in a sealed mode. The spare part section furnace body, the heating section furnace body, the cooling section furnace body and the outlet section are sequentially connected in a sealed mode from right to left. Heating units of the heating section furnace body are evenly distributed in a furnace wall. A lifting connection piece device is arranged at the position, corresponding to the inlet section, of an inner cavity of the spare part section furnace body. Roll gangs locate in the same horizontal level are arranged in the spare part section furnace body, the heating section furnace body, the cooling section furnace body and the outlet section. According to the metal workpiece surface reduction device and method, continuous production can be achieved, working efficiency is ensured, the labor intensity of workers is reduced, nitrogen is adopted for reducing an oxidation layer on the surface of a metal workpiece, the metal workpiece with the flat surface can be obtained, the surrounding environment is effectively protected, secondary loss of metal is avoided, and the metal utilization rate is improved.

The invention discloses a vehicle emergency system based on the Internet. The system comprises a protective case, and a vehicle-mounted micro-processing module fixedly connected to the interior of theprotective case; the vehicle-mounted micro-processing module is electrically connected with a problem selection module, a two-dimensional bar code scanning module, a first GPS module and a vehicle-mounted communication module; the vehicle-mounted communication module is in signal connection with an emergency information processing platform; the emergency information processing platform is electrically connected with an emergency system. The invention discloses the vehicle emergency system so as to improve competition of tires in the market; the system is applicable to all vehicles; when vehicle tires are broken in the field travel of people, the system can be used for calling the nearest maintenance station, so the maintenance station can timely arrange maintenance personnel for maintenance, and secondary losses caused by the fact that people need to wait for a long time in situ or forcibly drive the vehicle when tires of the vehicle are damaged can be avoided; the mode of the systemcan be developed in the form of a company, people do not need to take one or more spare tires when going out, and money and effort are saved.

The invention discloses a determination method for the trench angle of a bottom structure, specifically to a method for determining a trench angle for a steeply dipping medium-thick or thick ore body (>= 55 DEG, > 4 m, and f=3 to 20) employing a bottom structure for ore removal. The method separately quantifies influence on the trench angle by uncertain factors consisting of firmness and stability of ore rocks, the caking properties, water content and lumpiness of ore, thickness of the ore body, technical parameters of rock drilling equipment and the like by using an orthogonal testing method, an engineering analogy method, an induction method, a numerical simulation method and the like, so relationships between the trench angle and the factors are clearly determined; and thus, an optimal trench angle can be eventually determined. The determination method provided by the invention can improve mobility of caved ore and ensure stability of continuous ore removal, thoroughly overcomes the technical problems of insecurity of suspended arching of ore, secondary loss rate of caved ore and the like and is of important practical significance to safety of a stope room and economic stoping.