468results about How to "Avoid competition" patented technology

The present invention is directed to a method for the determination of a target nucleic acid using a special control nucleic acid, a method for the amplification of a partial sequence of said target nucleic acid using primers, a special control and a kit containing said control. The sequence of these control nucleic acids are at least in part parallel-complementary to the sequence of the target nucleic. These controls have similar properties as the target nucleic acid in hybridization and amplification methods, but can be well differentiated from the target nucleic acid by their different sequence.

A robot apparatus which, by exploiting limited resources highly efficiently, is capable of making expressions matched to the motion or to complex variegated feeling or instinct states, representing the crucial information in achieving smooth communication with the human being, is disclosed. A method of expression by the robot apparatus is also disclosed. The robot apparatus expresses plural states, such as emotional states or the processing states of perceptual recognition, by a light radiating device loaded at a location of the head part of the humanoid robot apparatus walking on two legs. The light radiating device includes e.g. the color hue, saturation and patterns of light emission as expressive units represented independently of one another. A plural number of orthogonal states, that is, the emotional states and the states of perceptual recognition, are expressed simultaneously, using a plural number of the orthogonal representations of the light radiating device correlated by a unit for correlating plural reciprocally orthogonal states, derived from the own inner states or external stimuli, with at least one expressive unit.

A robot apparatus which, by exploiting limited resources highly efficiently, is capable of making expressions matched to the motion or to complex variegated feeling or instinct states, representing the crucial information in achieving smooth communication with the human being, is disclosed. A method of expression by the robot apparatus is also disclosed. The robot apparatus expresses plural states, such as emotional states or the processing states of perceptual recognition, by a light radiating device loaded at a location of the head part of the humanoid robot apparatus walking on two legs. The light radiating device includes e.g. the color hue, saturation and patterns of light emission as expressive units represented independently of one another. A plural number of orthogonal states, that is, the emotional states and the states of perceptual recognition, are expressed simultaneously, using a plural number of the orthogonal representations of the light radiating device correlated by a unit for correlating plural reciprocally orthogonal states, derived from the own inner states or external stimuli, with at least one expressive unit.

The invention provides an intelligent household electric appliance system based on ZigBee and page generation and an implementation method thereof, wherein the system comprises a computer, an embedded Web gateway and a plurality of terminal devices. The embedded Web gateway comprises an ARM (Advanced RISC Machine) microprocessor, a Flash SDRAM (synchronous dynamic random access memory), a time circuit, a power circuit, a network card interface and a ZigBee coordinator module, wherein the automatic generation of the household electric appliance control page is achieved based on the embedded Web server. The ZigBee coordinator module is wirelessly connected with the terminal devices via a ZigBee protocol for transmitting operation instructions and uploading the date of the terminal devices. The terminal devices receive the gateway instructions, execute the control instructions and unload the operation state of the devices and the environment parameter data. The computer remotely accesses the embedded Web gateway via the internet so as to obtain the household electric appliance control page, to manage the names of the terminal devices and to check and control the operation state of the devices and the environment parameter.

The invention relates to an inorganic-organic microbial compound fertilizer and a preparation method thereof. The inorganic-organic microbial compound fertilizer is characterized by comprising ordinary high-concentration three-element compound fertilizer, humic acid, fly ash, microbial compound bacteria powder and other elements, wherein the microbial compound bacterial powder is obtained by mixing bacterial powders which are prepared by respectively fermenting and culturing photosynthetic bacteria, yeast, lactic acid bacteria, bifidobacterium, bacillus subtilis, bacillus licheniformis, bacilluslaterosporus, bacillus megaterium, bacillus mucilaginosus, azotbacteria chroococum and actinomycetes. In the inorganic-organic microbial compound fertilizer, the microbial content of the yeast is no less than 2.0*108cfu / g, and the microbial contents of the other strains are all no less than 2.0*109cfu / g. The inorganic-organic microbial compound fertilizer can centralize the advantages of an organic fertilizer, an inorganic fertilizer and microorganisms, thereby enhancing the stress resistance and the disease resistance of crops, enhancing the fertilizer absorption ability of the crops, lowering the soil hardening degree and improving the soil ecological environment and the quality of the crops.

A bandwidth requesting system includes: a bandwidth requesting device provided to a network to which a plurality of client devices configured to play contents are connected; a router provided externally from the network and connected to the network; and a relay server provided externally from the network and connected to the network via the router; wherein the bandwidth requesting device determines an appropriation request bandwidth based on all bandwidths which the plurality of client devices connected to the network need, and requests the determined appropriation request bandwidth to the relay server via the router; and wherein the relay server determines a bandwidth to appropriate to the network, based on a bandwidth capacity which can be appropriated to the network and the appropriation request bandwidth requested from the bandwidth requesting device, and sends the determined bandwidth to the bandwidth request device, via the router.

The invention relates to a quick-acting multi-microorganism composite water flush fertilizer and a preparation method thereof. The quick-acting multi-microorganism composite water flush fertilizer is characterized by being prepared by mixing bacterial powder which is prepared by fermenting and culturing photosynthetic bacteria, pichiafermentanslodder, lactic acid bacteria, bifidobacterium, bacillus subtilis, bacillus licheniformis, brevibacillus laterosporus, bacillus megaterium, bacillus mucilaginosus, azotobocter chroococcum and actinomycetes. The density of the pichiafermentanslodder ACCC20319T in the quick-acting multi-microorganism composite water flush fertilizer is more than or equal to 2.0*10<8>cfu / g, and the densities of other bacteria are more than or equal to 2.0*10<9>cfu / g. The quick-acting multi-microorganism composite water flush fertilizer can improve the quality and yield of crops and shorten growth period of crops.

The invention relates to a device and method for a sludge digestive juice semi-partial nitrification anaerobic ammonia oxidation denitrification and denitrifying phosphorus removal coupling system and belongs to the technical field of biological sewage treatment. The device comprises a raw water tank, a denitrifying phosphorus removal reactor, a first regulating water tank, a semi-partial nitrification reactor, a second regulating water tank, an anaerobic ammonia oxidation reactor and a water discharging water tank; the method for the sludge digestive juice semi-partial nitrification anaerobic ammonia oxidation denitrification and denitrifying phosphorus removal coupling system comprises the steps that sludge digestive juice firstly enters the denitrifying phosphorus removal reactor, phosphorus-accumulating bacteria release phosphorus by utilizing a carbon source in raw water, then NO3-N in refluxed anaerobic ammonia oxidation effluent is utilized for carrying out denitrifying phosphorus removal, effluent is discharged into the semi-partial nitrification reactor and the anaerobic ammonia oxidation reactor for realizing removal of ammonia nitrogen in the raw water; one part of effluent of the anaerobic ammonia oxidation reactor is discharged, one part of the effluent of the anaerobic ammonia oxidation reactor is refluxed into the denitrifying phosphorus removal reactor for being used during denitrifying phosphorus removal. The method for the sludge digestive juice semi-partial nitrification anaerobic ammonia oxidation denitrification and denitrifying phosphorus removal coupling system can be applied to biological nitrogen and phosphorus removal of high ammonia nitrogen waste water with low CN ratio, oxygen consumption and energy consumption are reduced compared with the traditional denitrification and phosphorus removal technology, and denitrification and phosphorus removal efficiency is greatly improved.

The invention relates to an implementation method of double-port RAM mutual exclusion access. The method comprises the following operation steps: 1) dividing a shared data area into a plurality of data areas by an address partitioned mode, and establishing a corresponding software protocol; 2) dividing a shared storage area of a RAM into a plurality of large data areas starting from an initial unit according to the type of exchange data in software partition processing; determining size of the data areas based on practical transmission data; and subdividing the large data areas into a data receive buffer area and a data send buffer area, and defining each buffer area with corresponding data access base addresses and read-write pointers; and 3) in the system, all the communication work of an external system is completed by a slave, while a host is only required to write the date to be sent into the corresponding data buffer area in the double-port RAM or read the required data.

The invention relates to a load balancing software architecture based on a multi-core platform and a method therefor, comprising the following content: 1) the multi-core platform and load balancing equipment are taken as framework elements, and a kernel thread is initialized for every network card on the load balancing equipment to be taken as the soft interruption routine of the network card; the kernel threads respectively process input and output of the corresponding network cards, and the kernel threads are independent; 2) an independent channel is set up for the information exchange between every two network card threads, and a group of bidirectional ring-shaped arrays can be set up in each channel and taken as a coupler between the multi-core platform and load balancing equipment; the ring-shaped arrays can maintain a writing point and a reading point and are respectively operated by two threads, so that the information exchange between the threads is not needed to be locked; 3) routing policy of balanced load of a server can be realized in the soft interruption routine of the input of the network card, and all work of an application layer is executed in a link layer. The multithreading lockless software architecture is adopted to realize the balanced load of the server; furthermore, the practice proves that the invention can remarkably improve the performance of the load balancing equipment.

The invention discloses a random access method and device. A fast random access preamble is set for each user terminal which can be fast randomly accessed, and fast random access resources are distributed; the fast random access of the user terminal which can be fast randomly accessed can be realized by using the fast random access preamble set for the user terminal and the distributed fast random access resources. By using the method and device provided by the invention, relatively independent fast random access preambles and resources can be provided for special types of user terminals which can not lose uplink synchronization so that the fast random access relative to common random access in the prior art can be realized, the access expenses and delay of fixed types of terminals can be obviously reduced, the access speed is obviously increased, the competition with the random access resources of other types of terminals can also be avoided, and the access conflict probability at a network side is greatly reduced.

Gamified computerized project management system and method which harnesses the innate human desire for playful competition and continual skill advancement to improve organizational productivity. The system allows team member bidding on project tasks, where they accumulate points according to various criteria including how well their work product meets previously established criteria, as well as an opportunity to acquire additional points from mastering various task related learning material. Other factors, such as providing assistance to other team members, evaluating work product, and the like are also awarded points. Competition is fostered by allowing team members to see where their point score ranks versus other players, while teamwork and member skill growth is also encouraged. Gamified project management files containing comprehensive project records may be saved, converted to standard project management files, or constructed by translation process that gamifies standard project management files. Standard prefabricated gamified project files may also be used.

The invention relates to an indoor integrated positioning platform and a positioning method. The indoor integrated positioning platform includes a system software layer, a device access layer, a service layer, a business integrated layer, a business software layer, and a presentation layer. The subsystem in each layer processes the data thereof through the service layer. An optical fiber communication network system and an RFID-based signal acquisition system import the data of different subsystems and realize data interaction between the subsystems and the indoor integrated positioning platform through the device access layer. The indoor integrated positioning platform adopts a honeycomb networking structure. Each device communicates with a gateway in a plurality of directions, and each device has a wireless signal relay function.

The invention relates to a valve controller based on ZigBee communication technique and a control method, belonging to the water saving irrigation automatic control system, wherein the valve controller is composed of a adjustable power radio frequency and central control module, a valve control module, a water pressure acquisition feedback module, a project installment debugging module and a power supply unit, the power supply unit has three power supply paths while a 3.3V power supply is normally opened, a 5.5V power supply and a 500mA large current power supply controlling the switch of an electromagnetic valve can be turned off, the control center and the valve control nodes form a ZigBee net communication, the radio frequency is adjustable according to distance. The invention uses a working mode of integral awake and integral dormancy for the valve controller to switch the electromagnetic valve and feedback information. The invention has ultra low power consumption, can realize ZigBee communication after using a battery, and has high reliability, high safety, simple installment, simple debugging and intelligent water quantity measurement. The invention can give full play to the advantages of mulch drip irrigation technique and is beneficial for engineering realization.

A high-efficiency nitrogen and phosphorus synchronous removal method in treating low concentration wastewater belongs to the technical field of biochemical process sewage biological treatment. Aiming at the characteristics of low pollutant concentration and low water inlet C / N in low concentration wastewater, and the disadvantages of low carbon source utilization rate, poor effect of nitrogen and phosphorus synchronous removal, high energy consumption, etc. of a traditional A / O technology in treating the sewage, the method of the invention combines the traditional A / O technology and a step feed technology: an A / O technology anoxic segment is changed into a prepositioned pre-anoxic segment and an anaerobic segment by adding a baffle wall in the A / O technology anoxic segment, and sludge flows backwards to the pre-anoxic denitrification segment; and a nitrated stage is improved with an anoxic-aerobic alternative operation mode, and raw water is separately introduced into each anoxic segment and anaerobic segment by part. Through controlling a four part water inlet flow ratio and controlling the DO of a first aerobic segment as 1.5 to 2 mg / L, and the DO of a second aerobic segment and a third aerobic segment as 1.0 to 1.5mg / L, the method of the invention can realize the water inlet carbon source effective utilization rate of the low concentration city sewage reaching 77% and outlet water reaching first level A discharge standards.

The invention provides a high-accuracy liquid-phase dechlorinating agent. The dechlorinating agent is prepared from the following components in percentage by weight: 5-20 percent of CuO, 5-10 percent of CaO, 4-8 percent of KOH and the balance of modified activated carbon, wherein the modified activated carbon is activated carbon which is subjected to acidification and oxidation. According to the dechlorinating agent, the modified activated carbon is adopted as a carrier, the open-framework structure of the activated carbon can be optimized, the pore volume and specific surface area can be increased, the content of the oxygen-containing functional group on the surface of the activated carbon can be increased, the carrier polarity can be improved, the combination degree between the carrier and the active ingredient can be enhanced, loss of the active ingredient can be reduced, hydrogen chloride which is a polar molecule can be easily and stably adsorbed on the surface of the modified activated carbon having relatively large polarity, and the dechlorinating accuracy can be improved. Furthermore, the reaction activity of the dechlorinating agent and hydrogen chloride can be increased due to the synergistic effect of three active substances in the dechlorinating agent, and maximization of chlorine capacity of the dechlorinating agent can be effectively realized, so that the chlorine capacity of the liquid dechlorinating agent can be more than or equal to 16 percent, and the dechlorinating accuracy is lower than 0.5ppm.

Floating ponds for the cultivation of algae are disclosed. The floating ponds consist of a buoyant framework, a liner, a culture, and a mooring system. Submersible floating ponds are disclosed with a buoyant framework built from tubes that may be filled or partially filled with, for example, air, or water, or the surrounding water, or the culture, and thereby the present invention provides a framework in which the buoyancy may be modulated. Use of submerging lines and spools are disclosed to control the orientation and depth of the floating pond during submersion.

The invention discloses a method and a system for controlling garment production line equipment, wherein a sub-PLC, an Ethernet conversion module and a non-contact card reader are arranged on each processing station on a production line; a computer in a control unit directly monitors a main PLC which exchanges data with the Ethernet conversion modules in the processing stations through a main Ethernet conversion module; and an IC card is arranged on each garment hanger. When one garment hanger passes through the processing station on the production line, the non-contact card reader of the processing station reads information in the IC card and transmits the information to the sub-PLC in the processing station; the sub-PLC sends a request to the main PLC for the information in a communication mode; and the main PLC analyzes the received information and transmits a result to the corresponding sub-PLC and the computer, so that the processing position of the garment hanger is determined. The method and the system solve the problems that the communication speed between work stations and a master station during operation of the prior production line is slow, so that time-sequence competition is easy to generate and normal operation of the production line is unfavorable.

The present invention is directed to a method for the determination of a target nucleic acid using a special control nucleic acid, a method for the amplification of a partial sequence of said target nucleic acid using primers, a special control and a kit containing said control. The sequence of these control nucleic acids are at least in part parallel-complementary to the sequence of the target nucleic. These controls have similar properties as the target nucleic acid in hybridization and amplification methods, but can be well differentiated from the target nucleic acid by their different sequence.

A single layer ground cover (10) preventing weed growth comprising a fabric (12) providing at least one degradable portion (16) running lengthwise of the fabric and having opposed edges (18,19); and a non-degradable portion (20) adjacent the opposed edges of the degradable portion, wherein the degradable portion comprises from about 5% to about 75% of the area of said ground cover, and wherein the degradable portion substantially degrades before said non-degradable portion after exposure to ambient conditions. A method for facilitating tree growth and preventing weed growth comprises providing a ground cover comprising at least one degradable portion and at least one non-degradable portion; locating the ground cover on a section of ground to be planted; cutting a hole in the degradable portion of the ground cover; planting a plant within the hole; and covering the ground cover with soil sufficiently to at least bury it.

The invention provides a set-top box centralized control system and method for integrating network TV and smart home. The system includes five parts: set-top box, TV, infrared remote control, camera and smart home appliances. The set-top box is connected to the Internet through the network card interface, the TV and the set-top box are connected through the video interface and the audio interface, the infrared remote control and the set-top box use the infrared communication protocol to communicate, the camera is connected to the set-top box through the USB interface, and the smart home appliance and the set-top box are connected wirelessly through the ZigBee protocol . In the control method, the user chooses to watch Internet TV programs, inquire and control smart home appliances, or view surveillance videos according to needs. The three functions can be controlled centrally and switched on the same screen through the set-top box and TV. The invention integrates network TV, intelligent home appliance control and video monitoring, realizes same-screen switching and centralized control, and has the advantages of intelligence, multi-function and convenient operation.

The present invention relates to eukaryotic cells which have the ability to convert L-arabinose into D-xylulose 5-phosphate. The cells have acquired this ability by transformation with nucleotide sequences coding for an arabinose isomerase, a ribulokinase, and a ribulose-5-P-4-epimerase from a bacterium that belongs to a Clavibacter, Arthrobacter or Gramella genus. The cell preferably is a yeast or a filamentous fungus, more preferably a yeast is capable of anaerobic alcoholic fermentation. The may further comprise one or more genetic modifications that increase the flux of the pentose phosphate pathway, reduce unspecific aldose reductase activity, confer to the cell the ability to directly isomerise xylose into xylulose, increase the specific xylulose kinase activity, increase transport of at least one of xylose and arabinose into the host cell, decrease sensitivity to catabolite repression, increase tolerance to ethanol, osmolarity or organic acids; and / or reduce production of by-products. The cell preferably is a cell that has the ability to produce a fermentation product such as ethanol, lactic acid, 3-hydroxy-propionic acid, acrylic acid, acetic acid, succinic acid, citric acid, amino acids, 1,3-propane-diol, ethylene, glycerol, -lactam antibiotics and cephalosporins. The invention further relates to processes for producing these fermentation products wherein a cell of the invention is used to ferment arabinose into the fermentation products.

A system and method for efficiently combining multiple laser beams into a single frequency by invoking stimulated Brillouin scattering (SBS) in a dual core optical fiber is disclosed. The method and apparatus essentially becomes a brightness converter for the input laser beams. An SRS seed is generated in a long length of fiber or by a diode and is launched into the back-end of the SBS combining optical fiber. Various single-frequency pump beams are launched into the front-end of the same fiber. The seed acts to lower a threshold for SBS in the fiber, thus invoking the nonlinearity. Provided the various pump beams are close in frequency and seed / pump modes overlap, each acts to amplify the seed through the nonlinear SBS process, providing an output signal which is brighter than the combined pump beams.

The invention provides a temperature sensor applied to a metering ammeter. The temperature sensor comprises an analog circuit portion, a digital circuit portion and a user ARM portion. The analog circuit portion comprises a positive temperature coefficient current generator in direct-proportion current bias with an absolute temperature, a bias current mirror array, a low-temperature drift coefficient reference current source, a temperature-sensitive transistor and an analog-to-digital conversion integrator. The digital circuit portion comprises a switch control logic, a digital code output, a digital counter and a shift register. The analog-to-digital conversion integrator has a sampling capacitor and an integrating capacitor, of which the capacitance is same; and bias current of the temperature-sensitive transistor is biased by six unit current mirrors in turns in a proportion of 5:1. According to a temperature trimming method for the temperature sensor, the number of the bias current mirrors is 6, wherein 5 paths of currents are used for coarse tuning, and the other one path of current is used for fine tuning; when the output bias of the counter is relatively large, the 5 paths of coarse-tuning currents are used; and when the output of the counter is between the two paths of unit currents, fine tuning is used.

The invention relates to an integrated anaerobic ammoxidation / denitrification / dephosphorization parallel short-range nitration low-carbon municipal sewage treatment device and method, belonging to the field of sewage biological treatment. The device comprises a raw water tank, an integrated anaerobic ammoxidation / denitrification / dephosphorization reactor, a regulating water tank, a short-range nitration reactor and a water outlet tank, wherein municipal sewage respectively enters the integrated anaerobic ammoxidation / denitrification / dephosphorization reactor and short-range nitration reactor. In the integrated anaerobic ammoxidation / denitrification / dephosphorization reactor, phosphorus-accumulating bacterium fully utilizes the organic carbon source in raw water to release phosphorus in an anaerobic way. In the short-range nitration reactor, ammoxidation bacterium converts NH4<+>-N in the raw water into NO2<->-N, and the effluent water is subjected to water quantity regulation by the regulating tank to enter the integrated anaerobic ammoxidation / denitrification / dephosphorization reactor, thereby effectively removing nitrogen and also synchronously removing phosphorus and nitrogen. The method implements denitrification and dephosphorization on the sewage on the basis of saving the energy and fully utilizing the carbon source.

The invention discloses a sewage treatment method adopting a baffle plate and a membrane-aeration coupling device. A coupling reactor is formed by putting a well-trained membrane-aeration assembly in a third upstream compartment of a stably operating anaerobic baffle plate reactor. The process flow comprises the following steps of: carrying out an anaerobic reaction on sewage in a first upstream compartment of the anaerobic baffle plate reactor; carrying out an anaerobic reaction in a second upstream compartment of the anaerobic baffle plate reactor; carrying out an anaerobic reaction in the third upstream compartment of the anaerobic baffle plate reactor; carrying out an aerobic reaction and an anaerobic reaction in the membrane-aeration biological membrane assembly; carrying out an anaerobic reaction in a fourth upstream compartment of the anaerobic baffle plate reactor; and obtaining processed fresh water. By coupling the anaerobic baffle plate reactor with the membrane-aeration biological membrane reactor, the invention reaches the oxygen utilization rate approaching 100 percent, is suitable for growing and propagating nitrobacteria which grows slowly, improves the impact load resisting capacity of the membrane assembly, saves the equipment investment and operation cost and is easy to reach operation parameters needed for operation.

The invention relates to a suspended packing microbial quick film forming method, which is characterized by: aerating sludge for 48 hours, inoculating aerated sludge serving as bacteria to be inoculated onto a sequencing batch reactor (SBR) filled with a suspended packing, aerating for 6 hours, standing and settling for 6 hours; adding nutritive medium, aerating for 10 hours, standing and settling for 2 hours and finishing an operation cycle, wherein two cycles of operation are made each day, and in the operation cycles, sludge is drained to keep the suspended solid concentration of the sludge within a range from 2 to 20 g / L constantly; and operating for 7 to 25 days and finishing the film forming. In the invention, by controlling the suspended solid concentration of the sludge, the competition between the sludge and nutrients is inhibited so as to allow biofilms to obtain enough nutrients. The method has the advantages of quick film forming, simple method, easy operation and high practicality. Thus, the method is suitable for suspended packing film forming of all kinds of sewage / wastewater and river water.

The invention discloses a nitration denitrificatoin and filter method and a nitration denitrification and filter device for a double-sludge series-connection aeration biofilter. The nitration denitrification and filter device is mainly composed of a water inlet system, a first section aeration biofilter, a second section aeration biofilter and a clean water tank, wherein the first section aeration biofilter is divided into a denitrification zone and a decarburization zone, suspended biological carriers serving as fillers are arranged in the denitrification zone, the second section aeration biofilter is connected with the decarburization zone of the first section aeration biofilter through a gas-water separator arranged in a middle water layer, and the second section aeration biofilter is divided into a nitration zone and a nitration deoxidization filter zone. The nitration denitrification and filter method comprises that denitrification and aerobic decarburization of waste water are respectively achieved through the denitrification zone and the decarburization zone of the first section aeration biofilter, ammonia nitrogen is converted into nitrate nitrogen through the second section aeration biofilter, electron acceptors are provided for the denitrification zone of the first section aeration biofilter, and chemical oxygen demand (COD), nitrogen (N) and suspended solid (SS) areremoved. The system nitration denitrificatoin and filter method and the nitration denitrification and filter device for the double-sludge series-connection aeration biofilter can achieve function separation of denitrification, decarburization and nitration and have the advantages of saving energy, being stable and denitrifying efficiently.

The present invention relates to a construction method of high-yield pantothenic-acid genetically engineered bacterium and the bacterium strain, and an application of the genetically engineered bacterium in preparation of D-pantothenic acid by microbial fermentation. The construction method is as follows: (1) enhancing expression of lpd gene; (2) knocking out glk and galP, destroying a glucose non-PTS transport system, enhancing expression of ptsG gene and enhancing a glucose PTS transport system; (3) knocking out yfbQ and ppsA genes; (4) knocking out poxB, pflB and ldhA genes; (4) knocking out ilvE gene; (5) introducing heterologous acetolactate synthase gene alsS; and (6) introducing heterologous pantothenic-acid transporter panT into plasmids and finally obtaining the optimal D-pantothenic acid high-yield escherichia coli genetically engineered bacterium strain. D-pantothenic acid potency increases from 2.76 g / L to 6.33 g / L.