57results about How to "Realize savings" patented technology

An austenitic-ferritic stainless steel having a low Ni content and a high N content is provided. A stainless steel which contains, in mass %, 0.2 % or less of C, 4 % or less of Si, 12 % or less of Mn, 0.1 % or less of P, 0.03 % or less of S, 15 to 35 % of Cr, 3 % or less of Ni, and 0.05 to 0.6 % of N, and is mainly composed of an austenite phase and a ferrite phase, wherein the proportion of said austenite phase is 10 to 85 volume %. The above austenitic-ferritic stainless steel exhibits good formability and high punch stretch formability, and is excellent in the resistance to crevice corrosion, to the corrosion of a welded zone and to intergranular corrosion. The above austenitic-ferritic stainless steel wherein the austenite phase contains C and N in a total amount of 0.16 to 2 mass % exhibits further improved formability.

The invention provides riverway water quality purification and ecosystem restoration adjustable wetland technology, which comprises that: a rubber dam with adjustable height is arranged in a riverway; potamogeton plants are planted at the upstream of the rubber dam of the riverway to form artificial wetland; the planting density of the potamogeton plants is between 20 and 30 clusters / m, and a cluster is between 3 and 4 plants; the retention and purification time of river water in the artificial wetland is adjusted by adjusting the height of the rubber dam, the height of the rubber dam is improved in normal and dry seasons to store water to make the water level at the upstream of the rubber dam of the riverway improved, and the adjusting height of the rubber dam is determined by the COD concentration of the river water at the inlet of the artificial wetland and the temperature of the river water. By planting the potamogeton plants in the riverway to form the wetland, instead of lifting the water onto land to construct an artificial wetland, the technology can more directly and effectively restore the damaged riverway ecosystem, improve the water quality of polluted river water, and can ensure normal flood discharge of the riverway in flood season.

The invention discloses an ecological comprehensive treatment system of a northern mountain river channel. The system comprises three sub ecological systems of an ecological permeable dike built on the upstream of a main stream and a branch stream of a mountain river, a reservoir pond arranged at the middle and downstream area of the mountain river and a wet land communicated with the reservoir pond, and adopts an ecological treatment mode of closure-storage-preservation. The construction method comprises the steps of: a) building of the ecological permeable dike; b) setting of a triangular pyramidal wood pile stone cage; c) building of the reservoir pond; d) planting of plants of the reservoir pond; e) building of a wet land system; and f) recovery of a river bank band. The system and the construction method can effectively intercept the mountain debris flow and the river non-point source pollution, adjust the river runoff, improve the hydrologic conditions of the mountain river in non-flood season, decrease the dry season of the mountain river, and facilitate to recover the ecological system of the mountain river. Meanwhile, traditional depressions and empty ponds in the mountain river can be used in construction, so that the engineering building cost is reduced, and the self-cleaning capacity of river water is improved.

The invention discloses a rainwater collecting and recycling system for an urban green land and a plaza; the rainwater collecting and recycling system comprises the green land, roads around the green land and the plaza; the green land is of a sunken structure which is lower than the roads and the plaza; the plaza is of a dome structure which is slightly lower at four sides; and the roads are of arched structures which are higher at the middle and slightly lower at two sides; rainwater on the roads and the plaza enters a water collecting well which is connected with a covered filtering channel; the water drain end of the covered filtering channel is connected with an underground impounding reservoir; a concrete cover plate layer is arranged at the upper part of the impounding reservoir; the green land is arranged at the upper part of the concrete cover plate layer; a water pump is arranged in the underground impounding reservoir; and the water outlet of the water pump is connected with a green land irrigation spray head. The rainwater collecting and recycling system for the urban green land and the plaza relieves the pressures on sewage disposal, municipal water supplying and shortage of urban water sources, realizes rainwater recovery and gives full play to the ideas of energy conservation, emission reduction and sustainable development.

The invention discloses a composite structure high barrier resin molded sheet material, and a processing method thereof. The sheet material comprises an outer film layer, a binding layer and an inner film layer. The outer film layer and the inner film layer are bound by the binding layer. The outer film layer is a polyethylene terephthalate (PET) sheet or a polypropylene (PP) sheet, and the inner film is a multilayer co-extruded film containing a barrier material, wherein the barrier material is a polyamide barrier layer or a polyvinylidene chloride barrier layer. The multilayer co-extruded film is processed through a downdraft water-cooling film-blowing method, or a film-casting method. Because the co-extruded film with an excellent obstructing performance is composed with a blank plastic sheet material, good moldability of the plastic sheet and excellent obstructing performance of the co-extruded film are integrated. Compared with sheet materials with a same thickness, the composite sheet material is substantially advantaged in flexibility. Therefore, multi-functional qualities of the sheet material can be realized, consumptions can be reduced, environment can be protected, and cost can be optimized.

The invention discloses hyaluronic acid modified mitochondria target liposome and a preparation method thereof. The mitochondria target liposome disclosed by the invention is prepared from drug carrying liposome and outer-layer modifying hyaluronic acid, wherein the drug loading liposome is liposome covered by hydrophobic drug and dequalinium chloride, and the hydrophobic drug is any one chosen from adriamycin, taxol, 10-hydroxycamptothecine, irinotecan or cis-platinum. The hyaluronic acid modified mitochondria target liposome disclosed by the invention has the beneficial effects that receptors are effectively targeted, uptake of tumor cells to liposome is improved, cell mitochondria is further targeted in the tumor cells, a function of damaging the mitochondria is achieved, tumor cell apoptosis is promoted, tumor cell growth is inhibited, and ability of overcoming multidrug resistance of the tumor cells is achieved.

A fire extinguishing gas spray device having a gas container (11) in which a pressurized fire extinguishing gas is placed and where a sealing plate (13) is attached to an opening of the container, cases (1, 10) that can receive the gas container (11), a seal breaking member (45) that has a point section (45a) capable of breaking the seal of the sealing plate (13), a seal breaker holder (21) wherethe seal breaking member (45) is installed, and a container holder (15) to which a mouth portion of the gas container (11) is removably attached and that has inside a through-hole (17) that receives the seal braking member (45) in a movable manner. The seal breaker holder (21) and the container holder (15) are approachable relative to each other. Communication paths (31-33) that interconnect the through-hole (17) and a spray hole (3) in an exterior portion are provided with a control valve (38) that can block the communication paths (31-33). A lighting device (48) that can be lit when the sealing of the sealing plate is broken is placed exposed on the surface of the cases (1, 10). The fire extinguishing gas spray device has an annunciator (53) that issues an alarm based on a fire occurrence signal or an earthquake occurrence signal from a disaster alarm device.

The invention discloses a portable permeability coefficient testing device of permeable concrete pavement and a testing method of the device, and belongs to the field of penetrating quality testing ofporous materials. The portable permeability coefficient testing device of the permeable concrete pavement utilizes a servo motor driving an injection piston cylinder to carry out water injection to simulate penetration process, penetration flow at a certain time can be converted according to a water injection rotating speed of the servo motor, and permeability pressure is detected by using a pressure sensor. According to the portable permeability coefficient testing device of the permeable concrete pavement and the testing method of the device, various data acquisition is more accurate and convenient in the testing process of permeability coefficients, and the testing precision of the permeability coefficients is improved; the rotating speed of the servo motor is controlled by a controller, and the effluent pressure of the injection piston cylinder can be controlled to meet the penetration test requirements of samples with different blockage degrees; and a large-size overflow cylinderis not needed by the testing device, the structure is simple, the size is small, and the testing device is convenient to carry and can realize a site test of the permeable concrete pavement.

The invention discloses a multi-layer plastic composite isolating sheet and a production process thereof. The multi-layer plastic composite isolating sheet comprises a base material layer, a bonding layer and an inner film layer, wherein the base material layer and the inner film layer are bonded through the bonding layer; the base material layer is made from a polystyrene sheet; the polystyrene sheet is formed by blending high-impact resistant polystyrene and universal polystyrene; the inner film layer is a multi-layer co-extruded thin film which contains an isolating material layer; and an isolating material in the isolating material layer is a (ethylene / vinyl alcohol) copolymer or polyvinylidene chloride. The multi-layer plastic composite isolating sheet can be produced by an ordinary sheet machine, is simple in process, low in cost, convenient to use, feasible and ideal in effect, can be applied to packaging of thermal treatment fermented milk products of an online molding-filling-seal capping production line and can prolong the shelf life of the products.

The invention belongs to the paddy field irrigation field and provides an automatic paddy field irrigation device. The device comprises a water tank, a water bag, a floating plate, a drain pipe, a float chamber and a float; the water tank is arranged at the water source injection opening of a piece of paddy field to be irrigated; the water bag is arranged in the water tank; the floating plate is arranged in the water bag; the top end of the drain pipe is connected with the water outlet of the water bag, while the bottom end of the drain pipe is arranged above the piece of paddy field to be irrigated; the float is arranged under the bottom end of the drain pipe by use of the float chamber; a plug is arranged on the top of the float, and used for plugging the bottom end of the drain pipe as the float rises when the irrigation stop water level of the piece of paddy field to be irrigated is reached. The automatic paddy field irrigation device is capable of performing automatic irrigation on the pieces of paddy field to be irrigated at all levels without wasting water resource, and drainage can be realized once the water outlet of the piece of paddy field at the lowest level is opened; besides, when rain falls, the water bag swells as the water level rises under the action of the floating plate inside the water bag, and therefore, rainwater can be accumulated; besides, the device is simple in structure, low in cost, convenient to use and easy to popularize.

A paper discharge roller pair, a roller support member, a support member rotation mechanism, a drive transmission unit, and a single drive source are provided; the paper discharge roller pair has a second roller disposed opposite to the first roller; the roller support member is freely rotatably supported The first roller can move between the first position where the first roller can cooperate with the second roller to discharge the sheet and the second position where the first roller is separated from the second roller; the support member turning mechanism makes the roller support member Rotation; the drive transmission part transmits the drive to the support member rotation mechanism; the single drive source transmits the drive to the drive transmission part. The roller support member is provided with a tooth-less gear portion and a cam stopper portion, and the support member turning mechanism has a tooth-less gear and a cam respectively corresponding to the tooth-less gear portion and the cam stopper portion of the roller support member, so that the roller support member can be Movement from the first position to the second position and movement of the roller support member from the second position to the first position.

The invention belongs to the field of paddy field irrigation, and provides an automatic paddy field irrigation device which comprises a water injection pipe, a floater chamber, a floater and a buoyancy valve block. The top of the water injection pipe is used for being communicated with a water source, and the bottom of the water injection pipe is arranged above a to-be-irrigated paddy field piece; the floater chamber is arranged below the bottom of the water injection pipe, a top opening and a bottom opening are formed in the floater chamber, and the set height of the top opening is equal to the height of irrigation stop water level for the to-be-irrigated paddy field piece; the floater is inserted in the top opening, and a first blocking body is arranged on the top of the floater and is used for blocking the bottom of the water injection pipe; an outer edge is arranged on the top of the floater, is positioned on the outer periphery of the first blocking body and is used for preventing water drained from the water injection pipe from directly flowing into the floater chamber; the buoyancy valve block is arranged below the bottom opening and is provided with a second blocking body which is used for blocking the bottom opening. The automatic paddy field irrigation device has the advantages that the automatic paddy field irrigation device is simple in structure, convenient to operate, low in cost and easy to popularize and utilize, the paddy field piece can be automatically irrigated by the automatic paddy field irrigation device without being watched by personnel, and rainwater can be accumulated by the aid of the automatic paddy field irrigation device.

The invention relates to a rolling technology for a pure tungsten sheet and a device thereof. An electric heating pipe is arranged in a roller; an electric heating platform is arranged at the front part on a rolling-in side of the roller; the top surface of the electric heating platform is located at a peak on the outer periphery of a lower roller; a roller wiper is arranged on a rolling-out side of the roller; and a temperature control device is used for controlling the temperatures of the electric heating pipe and the electric heating platform. According to the rolling technology, the rolling temperature of the tungsten sheet is strictly controlled, the electric heating platform is utilized to heat the to-be-rolled tungsten sheet, and meanwhile, the roller is heated and kept warm, thereby ensuring deformation of the tungsten sheet within a suitable plastic temperature range all the time during the whole rolling process, avoiding oxidization, greatly promoting the yield and realizing batch and low-cost production of ultrathin tungsten sheets.

The invention provides a semi support water storage green land structure for urban flood control and flood utilization. The structure comprises a rainwater infiltration structure, an underground water storage body water conveying and cleaning structure and a water taking and using structure; the rainwater infiltration structure comprises a road surface drainage ditch, green land backfilling soil and a first water permeable hose; the first water permeable hose is transversely arranged in the green land backfilling soil and is communicated with the road surface drainage ditch; the underground water storage body water conveying and cleaning structure comprises a geotextile, a common water permeable material, a second water permeable hose and rigid supports at two sides; the geotextile is paved below the first water permeable hose; the common water permeable material and the transverse second water permeable hose are arranged below the geotextile in sequence; the water taking and using structure comprises a water taking port, an inspection examination well and a third water permeable hose which are downwards arranged from the earth surface in sequence; the third water permeable hose and the second water permeable hose are communicated. The structure of an underground water storage body can be effectively improved, the construction cost and difficulty are reduced, the peak value of urban flood can be weakened and the flood resource can be stored.

The invention discloses a method for producing butanol by utilizing efficient fermentation of pichia pastoris solid waste, which belongs to the technical field of fermentation engineering and waste recycling. The method of the invention comprises the following steps: inoculating a corn powder culture medium with acetone clostridium butyri-cum to perform ABE fermentation, and when the fermentationreaches a solvent production period, adding pichia pastoris solid waste into the corn powder culture medium according to a given ratio to continue the fermentation. The method of the invention is usedfor producing the butanol, so that the recycling and reduction of the solid waste (pichia pastoris solid waste) can be realized, the fermentation raw materials (corn powder) can be saved, and the economical performance of the ABE fermentation can be improved.

The invention discloses a service time saving system which adopts a service time deposit card to only mark a server or a customer. The service time saving method comprises the following steps of sending service content or service request content to a service platform through a client side, or selecting service request content or service content from the service platform; reading an identification code of the server and recording service time through a service center when the server provides service to the customer in the service center, sending the identification code and the service time to the service platform, wherein the service platform is used for storing and managing personal information and service information of the service time deposit card holder, thereby realizing saving and consumption of service time. The service time saving system and the service time saving method can be used for meeting innovation needs of the present society to a service mode.

The invention belongs to the technical field of microalgae biology, and particularly relates to a method for promoting chlorella pyrenoidosa growth by using Volatile fatty acids. According to the present invention, a BG-11 culture medium is used as the base culture medium of chlorella pyrenoidosa, the algae liquid is subjected to centrifugal concentration when the microalgae grows to the logarithmic growth phase, 4-10g / L mixed Volatile Fatty Acids (VFAs) comprising acetic acid, propionic acid and butyric acid are added, the optical density value of the inoculated seed liquid at 680nm is 0.2-1.0, and the obtained material is placed at a temperature of 24-26 DEG C and is cultured for 2-5 days under a dark condition; and with the method, the growth period of heterotrophic chlorella pyrenoidosa can be significantly shortened, the microalgae can obtain the highest biomass concentration within two days, the rapid accumulation of biomass can be achieved, the conversion efficiency can be improved, the high culture cost problem caused by the too long culture period in the actual production can be reduced, and the new idea is provided for the large-scale production of oil production from microalgae.

The invention discloses a data center waste heat utilization device, which includes a cooling pool, a data center workshop and heat supply network user ends. A heat transfer device is further arrangedin the data center workshop, and the heat transfer device includes an immersion cooling header, a heat load buffer regulating unit, a water pump, and a connecting pipe; the immersion cooling header is composed of a cooling header body, a heat source device and a vertical circulating heat exchange pipe network; and the vertical circulating heat exchange pipe network is of a parting structure and adopts a two-end symmetrical structure, and a water outlet of the vertical circulating heat exchange pipe network is connected with the heat load buffer regulating unit. According to the data center waste heat utilization device, space configuration inside the immersion cooling header and cooling water working medium flow distribution are optimized, favorable conditions are provided for bead condensation, and the condensing heat transfer node condensing droplet reflux capacity of a condensing end is enhanced; storage of excess heat and heat load adjustment are realized by using phase-change materials; and meanwhile, the water temperature is effectively heated to 45 DEG C-60 DEG C, and water loss of an urban heat supply network is supplied as preheating water.

The invention provides riverway water quality purification and ecosystem restoration adjustable wetland technology, which comprises that: a rubber dam with adjustable height is arranged in a riverway;potamogeton plants are planted at the upstream of the rubber dam of the riverway to form artificial wetland; the planting density of the potamogeton plants is between 20 and 30 clusters / m<2>, and a cluster is between 3 and 4 plants; the retention and purification time of river water in the artificial wetland is adjusted by adjusting the height of the rubber dam, the height of the rubber dam is improved in normal and dry seasons to store water to make the water level at the upstream of the rubber dam of the riverway improved, and the adjusting height of the rubber dam is determined by the CODconcentration of the river water at the inlet of the artificial wetland and the temperature of the river water. By planting the potamogeton plants in the riverway to form the wetland, instead of lifting the water onto land to construct an artificial wetland, the technology can more directly and effectively restore the damaged riverway ecosystem, improve the water quality of polluted river water, and can ensure normal flood discharge of the riverway in flood season.

This invention discloses a kind of city cascade constant pressure supplying of water equipment and method. It includes water supply installation, water supply pipe network and constant and pressure device. The water supply device consists of a group of different frequency pump flow (5), its characteristic lies: there is pressure transducer in frequency pumps (5) one-way outlet valve (8) of water pipe, and it connects to the transducer (4) through lines, the transducer connects to controlled switches (6) through cable converter (3) frequency pumps (5) via wire connects to controlled switches, there are additional pressure and constant devices in the water pipes household heights tower. This invention has changed the traditional supply model, and achieved energy, saved money and prevented secondary water pollution.

This invention discloses a kind of city cascade constant pressure supplying of water equipment and method. It includes water supply installation, water supply pipe network and constant and pressure device. The water supply device consists of a group of different frequency pump flow (5), its characteristic lies: there is pressure transducer in frequency pumps (5) one-way outlet valve (8) of water pipe, and it connects to the transducer (4) through lines, the transducer connects to controlled switches (6) through cable converter (3) frequency pumps (5) via wire connects to controlled switches, there are additional pressure and constant devices in the water pipes household heights tower. This invention has changed the traditional supply model, and achieved energy, saved money and prevented secondary water pollution.

A resultant-force wind power generation device with an energy storage function overcomes the shortcomings that a single windmill is small in force and the power generation force cannot be integrated easily. According to the adopted scheme, the device comprises a group of windmills, a transmission device, an energy storage device and a generator set; the group of windmills rotate windward to simultaneously drive the transmission device and the generator and store the energy in an energy storage device; when the windward rotating power of the windmills is insufficient, the energy storage device drives the transmission device to rotate continually or assists the transmission device in rotation. The resultant-force wind power generation device has the benefits that the group of windmills have a large resultant force in driving the generator and can be optionally combined according to different wind field situations, so that manoeuvrability and flexibility are achieved, the wind power utilization ratio and conversion efficiency are high, the wind energy can be stored and released and converted into continuous output kinetic energy, and accordingly, the generator is enabled to rotate continually.

The invention discloses an agricultural water and soil improvement irrigation and drainage system. The agricultural water and soil improvement irrigation and drainage system is characterized in that a coarse screen and a fine screen are mounted in a screen well, the fine screen is horizontally mounted in the screen well and covers a rainwater purifying rubble layer at the bottom, an aeration regulation pool, a hydrolysis acidification pool and a contact oxidation pool are serially connected below the rainwater purifying rubble layer, a steel perforated top plate is arranged at the upper end of a regulation and storage unit, the aperture ratio of the steel perforated top plate is 60-70%, the pore diameter is 5-7 mm, a planting pool is arranged at the top of the steel perforated top plate, rainwater infiltrates into the regulation and storage unit via the planting pool to be stored, one side of the regulation and storage unit is connected with a third lift pump through a water conveying pipe, the water outlet end of the third lift pump is connected with a water outlet through a water conveying pipe, the water outlet is positioned right above a water storage tank, and an irrigating layer is mounted in the planting pool, formed by connecting a plurality of irrigation water pipes through five-way connectors and pre-buried in the planting pool. The agricultural water and soil improvement irrigation and drainage system realizes efficient utilization of water sources, and meanwhile, realizes rainwater purification, regulation, storage and recycling.

The invention discloses an enterprise tax planning system and method based on big data, and belongs to the technical field of enterprise tax planning. The system comprises an enterprise information acquisition module, a database classification module, an analysis module, a correction module, a prediction module and a tax planning module. The tax model can be generated according to relevant national laws and regulations and policies in combination with industry characteristics and enterprise operation conditions, operation and automatic distribution of enterprises are driven by AI data, the consistency of tax information and three flows (information flow, logistics and fund flow) of the enterprises or groups is achieved, through optimization of multiple modes such as big data and AI artificial intelligence from a source, a process and a mode, timely processing is carried out, so that reasonable, safe and law-saving tax payment of an enterprise is guaranteed. Legal combined tax payment of two sets of accounts is avoided, enterprise tax safety is guaranteed, and maximum economical and intelligent operation of enterprises is realized.

The invention relates to a small rolled self-fastening type cable bridge which is used for supporting laid wires, cables and pipe cable bus bars in indoor and outdoor high-voltage and low-voltage power transmission and distribution and information network projects for industrial and civil buildings and is widely applied in the wiring installation of power supply systems and control systems. The bridge is made of a rolled steel coil, a bottom plate (1) and bilateral sides (2) of the bridge body are of an integrated structure, the bottom plate (1) is provided with first longitudinal reinforcing ribs (11), the bilateral sides (2) are provided with second longitudinal reinforcing ribs (21), and the upper ends of the bilateral sides (2) are pulled and squeezed to form longitudinal S-shaped curved structures; the upper surface of a cover plate (3) is projected to form a longitudinal reinforcing rib, and both sides of the cover plate are pulled and squeezed to form longitudinal G-shaped curved structures, and are matched with the longitudinal S-shaped curved structures of the upper ends of the bilateral sides (2). Fasteners are not needed when the bridge is mounted, and the bridge is convenient to mount and dismount.

The invention discloses an ecological water treatment system built by virtue of solar energy and a low impact development facility. The ecological water treatment system comprises a photovoltaic water pumping system and the low impact development facility, wherein the low impact development facility comprises a multifunctional water storage pond, a wetland system, a natural water discharging system, a rainwater garden system, a wet pond and a drop water landscape; the wetland system is arranged along the edge of the multifunctional water storage pond; the drop water landscape, the rainwater garden system, the natural water discharging system and the wet pond are communicated in series to form a circulating water subsystem; the photovoltaic water pumping system is used for pumping a water body in the water storage pond to the drop water landscape; the water body naturally flows by self potential energy and enters the water storage pond through the circulating water subsystem so as to realize circulating treatment of ecological water. According to the ecological water treatment system, the operating expense is reduced, site rainwater can be regulated, stored and recycled, and the water body is treated by virtue of ecological measures to improve the water quality; water resources are saved, the original hydrological conditions before development are maintained, the runoff pollution is controlled, and the pollution emission is reduced; the'activity' of the landscape is improved and the landscape water environment is beautified.

The invention provides a permanent magnet traction system and a rail vehicle. The permanent magnet traction system comprises a direct current power grid, a traction converter, a permanent magnet traction motor and a super-capacitor energy storage system, wherein the direct current power grid, the traction converter and the permanent magnet traction motor are electrically connected with each otherin sequence; the first end of the super-capacitor energy storage system is connected between the direct current power grid and the traction converter; the second end of the super-capacitor energy storage system is connected between the permanent magnet traction motor and the traction converter; and the super-capacitor energy storage system is used for absorbing a counter electromotive force generated by the permanent magnet traction motor during the inertia of the rail vehicle or absorbing braking energy generated by the permanent magnet traction motor during the braking of the rail vehicle. According to the embodiment, the effect of the counter electromotive force, generated by the permanent magnet traction motor, on the traction converter is reduced during the inertia of the rail vehicle; and meanwhile, the energy can be saved.

Disclosed is a fountain writing brush. To expand functions of a writing brush effectively and achieve the novel functions of storing ink, lighting and displaying time of the writing brush, an ink storage tank is arranged at the upper end of a stem of the writing brush to store ink, a small watch is arranged on the stem to display time, a micro light and a switch are arranged at the lower end of the stem, and the light is switched on when light is weak.

The invention discloses a 7-ethyl-10-hydroxycamptothecin derivative prodrug in non-covalent binding with human serum albumin as well as preparation and application of the 7-ethyl-10-hydroxycamptothecin derivative prodrug. The prodrug has a structure as shown in a formula I, and is prepared by modifying 7-ethyl-10-hydroxycamptothecin with a monocarboxyl group of long-chain fatty diacid or modifying 7-ethyl-10-hydroxycamptothecin with a monocarboxyl glycine derivative of long-chain fatty diacid. The long-chain fatty acid in the prodrug can be subjected to non-covalent binding with human serum albumin to form a supramolecular drug delivery system. Under the tumor EPR effect and mediation of human serum albumin related receptors, the supramolecular prodrug can increase accumulation of drugs in tumors, reduce toxic and side effects and improve the anti-tumor effect.