81results about How to "Improve developmental ability" patented technology

Disclosed is a three-dimensional object model reconstruction system and method based on laser images. The system comprises a computer, a single chip microcomputer, a stepping motor, a rotary cradle head, a laser device, a camera, a chessboard calibration plate and a three-legged support. The reconstruction process includes: according to a classical Zhang Zhengyou chessboard calibration method, acquiring calibrated images and generating camera parameters through a hardware system; and controlling the single chip microcomputer by the aid of software so as to control the stepping motor in real time, enabling the surface of a target object to be scanned by laser rays by 360 degrees, performing real-time shooting by the camera to obtain a target image, importing the target image into the computer to be used for selective acquisition of point cloud, obtaining a spatial three-dimensional coordinate of the point cloud by the aid of a laser triangulation measurement method, and reconstructing a three-dimensional model of the target object.

The invention discloses a three-dimensional binocular camera platform experimental device, which comprising a base, a turntable, a support rack, a camera holder carrying plate, a straight rack and pinion distance adjustment mechanism, two camera holders, two camera turntables, two camera support plates, and five servo motors. A controller sends an instruction to a corresponding servo motor so as to control the above device to adjust the spacing between left and right cameras, the rotation angles of the left and right cameras and the overall pitch angles of the left and right cameras. The device is convenient in operation and strong in practicality.

The invention relates to a vehicle control unit for a pure electric vehicle. A vehicle control board with an ARM9S3C2440 master module and multi-site CAN (Controller Area Network) bus communication are adopted, and a power management system and a motor controller are combined to form a vehicle CAN control communication network. The vehicle body status monitoring, driver intention analysis, energy status monitoring, fault alarm monitoring, and vehicle running guarantee functions and the like are realized. The control unit is integrated with the status information of various parts such as an acceleration pedal, a brake pedal, a vehicle-mounted energy source and a driving motor to decide the currently taken control strategy; the warning forecast of the fault in the movement process of the vehicle is carried out; and when the vehicle decelerates and brakes, the whole power and an energy storage system work in an energy feedback status by control instructions. Meanwhile, the multi-site CAN bus technology is used, so that the stability of the whole control unit is substantially improved, and the cost is effectively saved.

An object of the present invention is to provide a toner excellent in fixing ability and developing ability. Provided is a non-magnetic toner including: toner particles each containing at least a binder resin, a colorant, and a wax component; and an inorganic fine powder, wherein: the toner has a specific storage elastic modulus at each of 110 C and 150 C; when a temperature at which a differential curve of a temperature and the common logarithm LogG′ of a storage elastic modulus G′ shows the minimum value in the temperature region of 60 to 130 C is denoted by T0, a straight line having the largest gradient out of straight lines each connecting points on the differential curve at temperatures of T0+a and (T0+a)+1 (C) [where a represents an integer of 0 to 9] is denoted by A, a straight line having the smallest gradient out of straight lines each connecting points on the differential curve at temperatures of T0+b (C) and (T0+b)+10 (C) [where b represents an integer of 0 or more] is denoted by B, and a straight line having the largest gradient out of straight lines each connecting points on the differential curve at temperatures of T0+c and (T0+c)+10 (C) [where c represents an integer larger than “a value b when a straight line B is given”] is denoted by C, the relationship of 1C ? ¢TA (from T0 to the point of intersection of the straight lines A and B) ? 20 C and the relationship of 100 C ? TBC (the point of intersection of the straight lines B and C) ? 120 C are established.

The invention relates to a method for improving the cultivation efficiency of bovine in vitro fertilization embryos. In particular, the invention relates to bovine in vitro fertilization embryo cultivation liquid. The cultivation liquid contains NaCl, KCl, NaHCO3, MgCl2, KH2PO3, sodium pyruvate, glucose, calcium galactonate, fetal calf serum, L-glutamine, necessary amino acid, unnecessary amino acid, glutathione and water. The invention also relates to a method for improving the cultivation efficiency of the bovine in vitro fertilization embryos. The method comprises the following steps: putting the bovine in vitro fertilization embryos into the bovine in the vitro fertilization embryo cultivation liquid, and performing embryo in vitro cultivation under the conditions of 38.5 DEG C, 0.5 percent CO2 and 100 percent humidity. The method provided by the invention and the used cultivation liquid present excellent technical effects as stated in the specification.

The invention discloses a Delta parallel-connection mechanical hand for teaching. The Delta parallel-connection mechanical hand comprises a Delta type parallel-connection mechanical hand machine body and a rack, the Delta type parallel-connection mechanical hand machine body comprises a detachable tail-end execution element, a plurality of servo motors and a plurality of sets of mechanical arms connected with the tail-end execution element. The servo motors correspond to the mechanical arms in a one-to-one mode, and one set of mechanical arms is driven by one servo motor; the servo motors are respectively and fixedly arranged on the top of the rack, and are connected with the corresponding mechanical arms respectively; each mechanical arm is mainly composed of an upper arm body and a lower arm body, one end of each upper arm body is connected with the corresponding servo motor, the other end of the upper arm body is connected with one end of the corresponding lower arm body through a first fisheye bearing with three freedom degrees, and the other ends of the lower arm bodies are connected with the tail-end execution element through second fisheye bearings with three freedom degrees. On the premise of greatly reducing the manufacturing cost, the original ecological Delta parallel-connection mechanical hand is built for a student to be learnt and developed.

The invention relates to a simple, economic and efficient method for the in-vitro maturity of porcine oocytes, which comprises the steps of collecting an ovary, collecting oocytes from the ovary, sieving the oocytes and maturing and culturing in vitro. The method is characterized in that the entire process of maturing and culturing the oocytes in vitro is carried out in a manual lung gas expiration environment, 40 of the sieved ovarian cumulus-oocyte complexes are in one hole on average and are transplanted into a four-hole plate which is transplanted into an inflation bag, a bag opening is sealed by a sealing machine, respiratory gas exchange is carried out by testing personnel, the gas of the lung is blown into the inflation bag by an air blowing needle, air in the inflation bag is exhausted completely, the inflation bag is filled with the gas of the lung, sealed, put into a constant temperature tank with the temperature of 38 DEG C and cultured, and maturing and culturing are carried out for 42-44h.

The invention provides a bovine oocyte in vitro maturation culture solution and a culture method. The maturation culture solution consists of 10% of fetal calf serum and 1% of ITS-G, as well as 0.075IU / mL of HMG, 1[mu]g / mL of 17[beta]-estradiol, 10ng / mL of EGF, 2.2mg / mL of bFGF and 50ng / mL of CXCL12. The culture solution, when applied to bovine oocyte in vitro maturation culture, can improve maturation quality of bovine oocyte in vitro culture, a development rate of in vitro fertilized embryos as well as a development rate of somatic cell nuclear transplantation embryos and blastocyst quality.

The invention discloses an avalanche tolerance test device of a power MOSFET device. The avalanche tolerance test device of the power MOSFET device comprises a front end power MOSFET device to be tested and a peripheral test circuit thereof, and a back end sampling control system; the test circuit comprises an adjustable direct current power supply, a fuse, an adjustable inductor, a voltage sampling resistor, a voltage dividing resistor and a current sampling resistor; and the sampling control system comprises an operational amplifier module, an AD module, a CPU module, a driving module, and an upper computer. The avalanche tolerance test device of the power MOSFET device disclosed by the invention has safe operation, simple equipment, low cost and objective test result, and can display the drain-source voltage of the MOSFET power device to be tested and the waveform of the current flowing through the drain-source in the upper computer; meanwhile, the avalanche tolerance test device ofthe power MOSFET device realizes a high instantaneous energy avalanche tolerance test, and provides important parameter indexes for device performance evaluation.

The invention relates to a method for bovine in-vitro fertilized embryo culture and a used culture solution. Particularly, on one hand, the invention relates to a method for culturing a bovine in-vitro fertilized embryo. The method comprises the following steps of putting the bovine in-vitro fertilized embryo into a bovine in-vitro fertilized embryo culture solution and carrying out embryo in-vitro culture under the conditions that the temperature is 38.5 DEG C, the content of CO2 is 0.5% and the humidity is 100%. The invention further relates to a bovine in-vitro fertilized embryo culture solution. The culture solution comprises NaCl, KCl, NaHCO3, MgCl2, KH2PO3, sodium pyruvate, glucose, calcium galactonate, fetal calf serum, L-glutamine, an essential amino-acid, a nonessential amino acid, glutathione and water. The method and the used culture solution have excellent technical effects in the specification, for example, the method has a higher blastocyst hatching rate when the bovine in-vitro fertilized embryo is cultured.

The invention relates to cell culture and particularly discloses an immature oocyte culture scheme which can promoting in-vitro maturation of immature oocytes. Specially, the scheme adopts follicular granulosa cells and a culture solution for culturing the follicular granulosa cells, wherein the culture solution for culturing the follicular granulosa cells contains CNP or its variants or analogues and an HDAC (histone deacetylase) inhibitor. The invention further provides an in-vitro maturation culture solution containing the CNP or its variants or analogues and the HDAC inhibitor and related compositions and application of a culture medium, the culture solution and the compositions in promotion of in-vitro maturation of immature oocytes.

The invention relates to a multifunctional expandable energy-saving hydraulic pressure integrated circuit, which is composed of two sets of hydraulic pipelines arranged perpendicular to each other and an electronic control unit, wherein each set of hydraulic pipelines is composed of n parallel hydraulic pipelines (n is equal to or greater than 2) at least; the two sets of hydraulic pipelines belong to different layers and are overlapped; the hydraulic pipelines arranged longitudinally are referred to as longitudes; the hydraulic pipelines arranged latitudinally are referred to as latitudes; the longitudes intersect and are perpendicular to the latitudes; the longitudinal hydraulic pipelines are connected with pressure sources; the latitudinal hydraulic pipelines are connected with actuators; longitudinal hydraulic pipelines and latitudinal hydraulic pipelines are connected at each intersection point via a two-way cartridge valve; so long as the cartridge valve at each intersection point is opened, the connection of one longitudinal hydraulic pipeline and one latitudinal hydraulic pipeline can be realized; the pressure sources and the two-way cartridge valve are controlled by the electronic control unit. According to the multifunctional expandable energy-saving hydraulic pressure integrated circuit, different circuits can be formed by connecting different latitudes and longitudes by means of opening or closing the two-way cartridge valves in the system, so that real-time expansion of load and oil sources in the system can be realized; through changing cartridge valve components and matching manner of multiple cartridge valves, the circuit has multiple functions.

The invention discloses a composition and a preparation for regulating plant growth and application thereof. The composition comprises an active ingredient A, an active ingredient B and synergist, wherein the weight proportion of the active ingredient A, the active ingredient B and the synergist is (12-116):1(2.5-40); the active ingredient A is ethephon; the active ingredient B is at least one of alpha-naphthylacetic acid or salt thereof and indolebutyric acid or salt thereof; the synergist is at least one of polyaspartic acid or salt thereof and polyglutamic acid or salt thereof. The composition and the preparation have a synergistic interaction effect in regulating plants especially for corn growth, not only can the excessive growth of the plants be controlled and the lodging-resistance capability be enhanced, but also the root growth is promoted, the root activity is improved, the root nutrition absorption capacity is improved, the crop resilience capacity is further improved, the quality is improved, and the aim of high yield is finally realized.

An image-forming member excellent in the developing ability and printing durability can be obtained and images can be formed without being accompanied by any accumulation of scum in a developing bath used, by developing an image-forming material, in particular, a negative-working image-forming material which comprises a substrate provided thereon with an image-recording layer comprising an infrared light absorber, a polymerization initiator, an ethylenically unsaturated bond-containing monomer and a binder polymer, using a developer which comprises at least one carbonate and at least one hydrogen carbonate, and at least one surfactant selected from the group consisting of nonionic aromatic ether type surfactants represented by the following general formula (1): X—Y—O-(A)n-(B)m-H (wherein X represents an aromatic group; Y represents a single bond or an alkylene group having 1 to 10 carbon atoms; A and B represent groups different from one another and each represents either —CH2CH2O— or —CH2CH(CH3)O—; m and n are 0 or an integer ranging from 1 to 100, respectively, provided that n and m cannot simultaneously represent 0 and that when either n or m is 0, n and m cannot represent 1) and anionic surfactants in an amount ranging from 1.0 to 10% by weight; and which has a pH value ranging from 8.5 to 11.5 and an electrical conductivity x falling within the range: 30<x<100 mS / cm.

The invention relates to ovary storing liquid and an ovary storing method, in particular to ovary constant-temperature storing liquid and an ovary constant-temperature storing method. The problems that at present, constant-temperature ovary storing time is over short, and the quantity and the quality of oocytes are affected are solved. The ovary constant-temperature storing liquid comprises phosphate buffer, glucose and tea polyphenols. The ovary constant-temperature storing method comprises the following steps of (1) removing adipose tissues surrounding an ovary and then rinsing the ovary by using normal saline; and (2) placing the ovary which is cleaned in the step (1) in the ovary constant-temperature storing liquid. The ovary constant-temperature storing liquid has the advantages of high efficiency, low cost, high convenience and zero toxicity on cells. The ovary constant-temperature storing method is simple and is easy to operate; other refrigerating equipment is not required; and the ovary constant-temperature storing liquid and the ovary constant-temperature storing method are particularly suitable for collecting ovaries of wild animals in fields; and the collected ovaries of the animals can be conveyed at constant temperature by a long distance.

The invention relates to nap-up and nap-down brushed yarn buck foaming resin for synthetic leather and a preparation method thereof. The yarn buck foaming resin consists of the following raw materials in parts by weight: 40-50 parts of solvent type PU (Poly Urethane) resin, 1-2 parts of refined high-temperature yarn buck powder, 0.5-2 parts of coarse low-temperature yarn buck powder, 30-50 parts of butanone, 5-15 parts of methylbenzene and 1-3 parts of organic silicone oil. The preparation method of the foaming resin comprises the following steps of: adding the refined high-temperature yarn buck powder, the coarse low-temperature yarn buck powder, the butanone, the methylbenzene and the organic silicone oil into the solvent type PU resin according to formula amounts; stirring at a high speed till the raw materials are dispersed uniformly; and filtering to obtain the nap-up and nap-down brushed yarn buck foaming resin. The foaming resin has the advantages of remarkable nap-up and nap-down effects, smooth handfeel, good touch feel, easiness for brushing, oil coke feel and the like, and can be used for preparing leather in the classic style, and the like.

The invention belongs to the field of assisted reproduction and particularly relates to vitrification refrigerating liquid. According to the vitrification refrigerating liquid provided by the invention, taxol is added to serve as a cryoprotectant and the vitrification refrigerating liquid obtained with reference to the taxol adding mode is treated, so that the development rate of in vitro fertilized blastocyst after the oocyte is thawed can be increased. The taxol serving as an additive in the refrigerating liquid can achieve the effects of reducing freezing injury of the mature oocytes and improving the development capability of the embryo after fertilization. The optimal concentration of the adding mode is obtained by researching the adding concentration of the taxol. The vitrification refrigerating liquid provided by the invention can greatly increase recovery rate after the frozen mature oocytes are thawed and the development rate of the blastula and achieves the protective effecton the cell ultrastructure.

The invention relates to road disease detection, and particularly relates to an unmanned aerial vehicle intelligent cruise road surface disease detection method, an unmanned aerial vehicle and a detection system. According to the unmanned aerial vehicle intelligent cruise road surface disease detection method based on deep learning, a road surface disease detection model based on a deep learning network and a road recognition model are arranged in an unmanned aerial vehicle. The detection method specifically comprises the steps that the unmanned aerial vehicle flies automatically on an actualroad surface determined by the road recognition model according to a preset route; and a road surface disease detection result is acquired in real time through the road surface disease detection model. The road recognition model and the road surface disease detection model based on the deep learning network are adopted, automatic cruise and automatic road surface disease detection can be achieved,automatic cruise detection can be achieved only by setting a preset route or a preset area range, and convenience and rapidness are achieved.

The invention relates to a method for improving the developmental capacity of sheep mature oocytes after vitrification refrigeration, belonging to the technical field of biology. The method comprises the steps of micro-injection fertilization of sheep mature oocytes and activation of fertilized eggs, wherein the activation of the fertilized eggs adopts a direct current pulse-chemical activation-direct current pulse mode, and experiments prove that the embryonic developmental capacity of the vitrified sheep mature oocytes subject to is greatly improved after the vitrified sheep mature oocytes is subject to intracytoplasmic sperm injection and is activated by the activation method of the invention. Compared with the conventional external fertilization method, the cleavage rate and the blastocyst rate are respectively increased to 13.7% and 6.8%. At the same time, by comparing the chromosome ploidy of embryos subject to different treatments, the result indicates that the proportion of normal-ploidy embryos (71.5%) obtained by the ECE method is apparently higher than that (45.4%) obtained by the common chemical activation method and no obvious difference exists compared with the external fertilization groups.

The invention provides an aquaculture water quality improver, which is prepared from the following components in parts by weight: 8-15 parts of oyster shell powder, 2-5 parts of activated carbon, 2-5 parts of kieselguhr, 5-10 parts of bentonite, 5-10 parts of kaolin, 1-3 parts of zeolite, 0.01-0.1 part of dodecyl dimethyl betaine, 0.01-0.1 part of myristic acid and 3-7 parts of activated aluminum oxide. The aquaculture water quality improver is a compound water quality improver mainly for adsorbing heavy metals, and has good adsorption ability for several main pollutants in a water body, thus being used for improving aquaculture water quality. The water quality improver is spherical, is rough in surface, and has more pore structures; due to the enlarged specific surface area, the water quality improver is beneficial to absorption of various pollutants. The aquaculture water quality improver is low in cost, simple in preparation method and good in effect; furthermore, when in use, the aquaculture water quality improver does not cause secondary pollution, thus having higher exploitability.

The invention relates to optimization liquid for in vitro maturation of advanced-age mouse oocytes. A preparation method comprises the steps of firstly, weighing 0.0232g of melatonin, enabling the melatonin to dissolve in 1ml of anhydrous ethanol, preparing 100mM of concentrated storage liquid, diluting 100mM of the concentrated storage liquid in an IVM culture medium until the concentration is 10-6mol / L, and the final concentration of the anhydrous ethanol is 0.01% smaller than that of the IVM culture medium, and preparing the optimization liquid for in vitro maturation of advanced-age mouseoocytes. In accordance with in vitro maturation culture liquid for commercial mouse oocytes, the culture efficiency cannot meet production and embryo transplanting requirements, and the in vitro maturation culture liquid for commercial mouse oocytes is improved, so that the maturing rate ( 87.53 + / -2.88% ) and the cleavage rate ( 79.04 + / -3.13% ) after fertilization, and the blastula rate( 65.69 + / -2.07% ) of the advanced-age mouse oocytes can be notably increased. Besides, the distribution and the activity of mitochondrial can be improved, and the oxidation stress level and the early apoptosis are reduced to weaken oocyte degradation caused by aging.

A method of assessing developing capacity comprises the following steps: a photoresist layer is formed on a control wafer; a first thickness is obtained by measuring the photoresist layer; the photoresist layer is developed; a second thickness is obtained by measuring the developed photoresist layer; the thickness difference of the photoresist layer is obtained by subtracting the second thickness from the first thickness of the photoresist layer; the greater the thickness difference is, the stronger the developing capacity is. With the steps, the cost of assessing the developing capacity of a developer is reduced; at the same time, the quality of the semiconductor devices of the actual process is not affected, and the yield is increased.

The invention discloses a method for producing an organic carbon fertilizer through photocatalytic and oxidized organic wastewater and relates to an organic wastewater treatment and waste utilization method. The method includes the following steps that 1, a photocatalytic and oxidized reaction container is prepared; 2, organic wastewater obtained after coarse filtration is pumped into the photocatalytic and oxidized reaction container; 3, photocatalysts and hydrogen peroxide are added, wherein the photocatalysts including TiO<2> / SiO<2> and Fe<3>O<4> are added, the hydrogen peroxide is pumped in, a stirrer is started to mix the photocatalysts and the hydrogen peroxide to be uniform, and the operation process is required to be kept out of the sun; 4, a photocatalysis-oxidative degradation reaction is conducted, wherein a top cover is opened so that sunlight can be directly emitted into the reaction container or an ultraviolet lamp is turned on for illumination; 5, the catalyst is recycled, evaporated, concentrated and made into a liquid organic carbon fertilizer with the carbon content being 50-500 g / L. The organic carbon fertilizer produced through the method can be used for crop irrigation and spraying and can further serve as fertilizer mother liquor to be blended into various types of fertilizers for being applied.

The invention discloses a multi-object disc type lateral flow test paper chip, a laser cutting preparation method, a use method, an application and a detection device thereof. Multiple hydrophilic channels connected with a probe storage pad are arranged on a disc hydrophobic base plate, so that the purpose of simultaneously detecting multiple objects can be achieved and integration and optimization of experimental result can be conveniently performed; quantity of channels, length of channels, detection type and the like can be designed according to different detection requirements, so that thedeveloping performance is strong; the capillary action is utilized to guide liquid flow, no additional liquid driving device is required, the biological compatibility is high and the post-processingis simple; size and shape of each zone of the test paper chip are designed according to the test requirements of to-be-detected objects; a laser cutting technology adopted for preparing the test paperchip has the characteristics of simple and convenient operation, short preparation period, low energy consumption, high precision and high repeatability; the multi-object disc type lateral flow testpaper chip can be used as a miniature and quick onsite fast detection instrument and especially has an excellent application prospect in the fields of clinical diagnosis, food hygiene, environment monitoring, biological chemistry and the like.

The present invention provides a wind generating set monitoring device and method based on an embedded computer and an acquisition card. A sensor acquires a vibration signal, the rotating speed and the like of a gear box of a wind generating set, the signals acquired by the sensor are digitized by a data acquisition card and then are imported in the embedded computer, the embedded computer carries out the spectral analysis, the envelope analysis and the order analysis on the vibration signal to obtain the amplitude of the characteristic quantity of the vibration signal and sends the data to an upper computer via a network, and the upper computer saves the data, displays the variation trend of the amplitude of the characteristic quantity and gives out a diagnosis result of the state of the wind generating set. According to the present invention, the equipment expandability and the maintainability are improved, at the same time, the equipment manufacturing and maintenance cost are reduced.

The invention provides a storage control FPGA-based FLASH bad block simulation verification system. The system comprises a simulated EEPROM module, a simulated analog quantity telemetry receiving module, a simulated serial port telemetry receiving module, a simulated storage board module, a simulated clock, a reset module, a block protection module, a simulated auxiliary control board module and asimulated remote control instruction sending module. The system is suitable for ground simulation verification of a storage control FPGA in a satellite product. Bad blocks can be generated in any position by changing a code analog storage board (based on a FLASH) of a simulation system; and the correctness of the storage control FPGA under various working conditions can be verified. Meanwhile, aworking process of a bad block table also can be recorded; various remote control instructions can be input to the storage control FPGA in a simulated manner; telemetry information is received and stored; and a closed-loop simulation environment is provided for the storage control FPGA. The system can be expanded and applied to storage control FPGA ground simulation verification of multiple typesof satellite products.

The invention belongs to the field of electric power detection, and especially relates to a high-speed electric power harmonic wave detector based on FPGA and ARM. The high-speed electric power harmonic wave detector altogether has five parts, namely a signal conditioning module, an A / D sampling control module, an FPGA coprocessor module, an ARM master controller module and a display module, wherein an output of the signal conditioning module is connected with an input of the A / D sampling control module; an output of the A / D sampling control module is connected with an input of the FPGA coprocessor module; an output of the FPGA coprocessor module is connected with an input of the ARM master controller module; and an output of the ARM master controller module is connected with an input of the display module.

The invention relates to an in-vitro culture system for Tibetan yak oocyte. Researches show that in an in-vitro culture process of cumulus-oocyte complexes (COC) of yak, proliferation of granule cellsof the yak can be obviously improved by adding exogenous BMP15, and an effect of obviously improving the oocyte maturation rate is achieved. According to the culture system disclosed by the invention, the influence of the BMP15 on yak COC in-vitro culture and a molecular regulation mechanism thereof in an in-vitro maturation process can be explored, and a developmental mechanism of the yak oocytein the maturation process can be further known, so that the in-vitro maturation culture quality of the yak oocyte and the developmental capacity of early embryos can be improved.

The invention relates to a method for improving percentage of fertile fruits of local plum, which comprises the steps of: 1. shading treatment, wherein the shading treatment is carried out on local plum trees from the middle third of July in summer to the last third of October, and at least one layer of shading screen with the light transmittance of between 45 and 80 percent is arranged above the local plum trees; and 2. gibberellin treatment, wherein at least one time of spraying the gibberellin with the concentration of between 50 and 150ppm is carried out from the middle third of September to the last third of October. The shading screen is a layer of netty object with the light transmittance of between 46 and 65 percent, the concentration of the selected gibberellin is between 60 and 120ppm; and the shading screen can also be two layers of netty objects with the light transmittance of between 65 and 75 percent, and the concentration of the selected gibberellin is between 60 and 120ppm. The method has the characteristics of simple and reliable method, obvious improvement on the percentage of fertile fruits of the local plum trees, improvement on the yield of the local plum, and so on.