Wanhua Chemical Group Co., Ltd.

Shandong New Beiyang Information Technology Co., Ltd.

China University of Petroleum

Hisense Visual Technology Co., Ltd.

Ocean University of China

Qingdao Hisense Hitachi Air-conditioning Systems Co., Ltd.

First Institute of Oceanography, Ministry of Natural Resources

Qingdao Vland Biotech Group Co., Ltd.

Dezhou University

Laser Institute of Shandong Academy of Sciences

Yang Liu

Bin Liu

Jing Li

Changxun Ju

Fuguo Li

Chengqun Qin

Lunpeng Wang

Bing Zheng

Xunkun Wu

Tianxin Jiang

Lei Zheng

Min Wang

Jiasheng Ni

Chen Wang

Min Yang

Chang Wang

Chang Li

Ying Shang

Bing Cao

Sheng Huang

Yingying Wang

Xiuxiu Wu

Kejing Lu

Shuangfang Lu

Xiaohui Liu

Chunguang Zhang

Yanxiong Liu

Wenli Li

Peng Tao

Yijun Huang

Botao Wang

Huayue Li

Congcong Mu

Ye Sun

Chao Chen

Deyi Li

Chuanming Li

Wen'an Zhao

Chengjun He

Jihai Wang

Guanxu Chen

Menghao Li

Xia Zhang

Sida Cheng

Yan Zhao

Fei Xiao

Bin Yang

Guanyu Ji

Jili Tian

Junliang Zhang

Kaiguo Fan

Rujun Sun

Zhiming Zhu

Xiangjian Kong

Naihua Jiang

Junxi Zhang

The disclosure provides a broadcast-type underwater navigation positioning system and method, wherein the system comprises a base station network consisting of a plurality of underwater base stations distributed on a seabed and a to-be-positioned user terminal located underwater, wherein the underwater base station comprises a bottom-mounted sonar and an mooring sonar, the bottom-mounted sonar and the mooring sonar are connected through a cable and are configured for ranging and communication through an underwater acoustic signal, the mooring sonar is integrated with an inertial measurement unit I, and the user terminal is provided with a passive sonar configured to unidirectionally receive an underwater acoustic signal sent by the mooring sonar for ranging and communication. The underwater navigation positioning system and method disclosed in the present invention can expand the service range of the base station, increase the capacity of the user terminal and improve the precision of regional sound velocity products.

Broadcast-type underwater navigation positioning system and method

The present invention relates to the technical field of biology, in particular to a phytase mutant, a preparation method therefor and an application thereof, a DNA molecule encoding the phytase mutant, a vector, and a host cell. The mutant provided by the present invention contains the substituent of an amino acid at at least one position selected from the following group: 36, 69, 89, 91, 111, 202, 213, 225, 238, 243, 253, 258, and 266. The heat resistance of the mutant is significantly improved, thereby facilitating the wide application of the phytase in feed.

Phytase mutant

A rail welding method and device are provided. The method includes: welding a bottom of rail, wherein welding is repeatedly performed along a first swing trajectory in a lengthwise direction of a weld seam, from one end of the bottom of rail to the other end of the bottom of rail; welding a waist of rail, wherein welding is repeatedly performed in the lengthwise direction of the weld seam along a second swing trajectory, from one end of the waist of rail, and the second swing trajectory is divided into two regions for respective welding in a width direction of the weld seam; and welding a head of rail, wherein welding is performed in the lengthwise direction of the weld seam along the first swing trajectory, between one end of the head of rail and the other end of the head of rail.

Rail welding method and device

Tweezer

Disclosed are a refrigerator, and a method for processing food information in a refrigerator. While a food editing interface is displayed, a voice recognition interface is displayed for rapidly entering into a voice detection state and then carrying out timely detection of voice input from a user.

Refrigerator and method for editing food information

An enzyme with an acyl transfer function has an amino acid sequence identical to a SEQ ID NO:, which is capable of acylation modification for macrolactins, filipins macrolides, chloramphenicol, and glycosylated piericidin A. An application of an acyltransferase of the present invention is to bind an acyl group of an acyl donor to macrolide compounds, chloramphenicol and glycosylated piericidins. The enzyme with the acyl transfer function can improve pharmacological activity of the macrolide compounds through acylation reaction of macrolactins, thereby improving bioavailability, enhancing efficacy, and reducing toxic as well as side effects, which provides a new strategy for the drug development of macrolide compounds.

Enzyme with acyl transfer function and application thereof

A stable dispersant and an application thereof in preparing copolymer polyols, the preparation method for the stable dispersant including the steps of 1) contacting a polyol with a dianhydride compound for reaction so as to prepare an adduct; 2) performing a ring-opening addition reaction on the adduct obtained in step 1) and an epoxy compound to prepare a stable dispersant; the dianhydride compound does not contain a double bond that may copolymerize with an olefinically unsaturated monomer, while the epoxy compound contains a double bond that may copolymerize with an olefinically unsaturated monomer, the polyol is a polyester polyol and/or a polyether polyol, preferably being a polyether polyol. The stable dispersant obtained by means of the described preparation method has a multi-active site anchoring function, and is applied to the synthesis of copolymer polyols to obtain copolymer polyols having relatively uniform particle size.

Stable dispersant and application thereof in preparing copolymer polyols

A macromonomeric stabilizer, a preparation method thereof, a method for preparing a polymeric polyol using same, and the polymeric polyol prepared. Also disclosed are a soft polyurethane foam obtained by foaming a composition of the polymeric polyol prepared and a polyisocyanate, and a molded product comprising the soft polyurethane foam. The preparation method of the macromonomeric stabilizer comprises the following steps: reacting a polyol with a tricarboxylate not comprising a polymerizable ethylenically unsaturated double bond, or a derivative thereof, to form an adduct; and reacting the resulting adduct with an epoxide comprising a polymerizable ethylenically unsaturated double bond. The macromonomeric stabilizer of the present invention has a low viscosity, comprises a plurality of active sites, and can be directly used in subsequent reactions. The preparation method of the macromonomeric stabilizer can be carried out under normal pressure, without the need for end-blocking with ethylene oxide.

Macromonomeric stabilizer, preparation method thereof, and method for preparing polymeric polyol

Provided are a modified polyether polyol and the use thereof in polyurethane foam materials. The method for preparing a modified polyether polyol comprises the following steps: 1) reacting a compound A with a polyether polyol, wherein the compound A is an anhydride and/or dicarboxylic acid compound containing a polymerizable double bond, preferably selected from one or two of maleic anhydride and itaconic anhydride, preferably maleic anhydride; and 2) reacting the product obtained in step 1) with an epoxy compound containing a polymerizable double bond in the presence of a catalyst, in order to prepare the modified polyether polyol. The modified polyether polyol obtained by means of the preparation method has more active sites, uses the polymerizable double bond for blocking, is used as a dispersion stabilizer for the synthesis of copolymer polyols, and has the characteristics of a better dispersion stability, filterability and a low viscosity.

Modified polyether polyol and use thereof in polyurethane foam materials

Disclosed are a vending machine and a method of detecting height of a storage column. The vending machine may determine whether a sensor squarely faces the front end surface of the level plate of a storage column by detecting the type of an output signal of the sensor. When the sensor squarely faces the front end surface of the level plate of the storage column, the height of the level plate of the storage column may be obtained based on a height difference between the sensor and the bearing surface of a bucket and the height of the bucket. Thus, according to the height of the level plate of the storage column, the bearing surface of the bucket and the upper edge of the front end surface of the level plate of the storage column lie in the same level when dispensing an item.

Vending machine and method for detecting height of storage column

An air conditioner and a control method thereof are provided. The air conditioner includes: a compressor including a coil; an oil pool connected to the compressor through an oil piping; a main control board configured to receive a power-on signal of the air conditioner, obtain an actual temperature of the oil pool after receiving the power-on signal, generate a required heating amount in response to the actual temperature of the oil pool being lower than a preset startup temperature, and generate timing control signals according to the required heating amount; a power device, wherein two sides of the power device are respectively connected to the main control board and the coil, and the power device is configured to drive the coil to heat the oil pool according to the timing control signals generated by the main control board.

Air conditioner and method for controlling the same

An evaluation method for different types of pore evolution in shale is related, which is applied to the field of unconventional oil and gas research. As the shale depth or maturity increases, different types of pores (including intergranular pores, intragranular pores, organic pores and fractures) developed in shale are constantly changing, which is important for shale oil and gas accumulation. The present invention starts from the high-resolution scanning electron micrography of shale, and respectively extracts the areal porosity of different types of pores based on the division criteria of different types of pores and pore identification in the established shale, and combines the low-temperature N, COadsorption experiments and the high-pressure mercury intrusion experiments to obtain the total pore volume and establish the evolution chart of different types of pores. The proposed method has an important application value for the exploration of unconventional shale oil and gas resources.

Evaluation method for different types of pore evolution in shale

An optical fiber distributed monitoring system and method is provided. The system includes a laser device, an acousto-optic modulator, a phase matching interferometer, a photoelectric detector and a phase demodulation module. After entering the phase matching interferometer, the Rayleigh backscattering light containing parameter information output from the sensing optical fiber enters the two arms of the phase matching interferometer respectively, and the light of the two arms of the phase matching interferometer is phase-modulated by the first modulation wave and the second modulation wave, respectively and then interfere with each other to generate interference light. The photoelectric detector converts a light signal into an electric signal, and the phase demodulation module processes the electric signal based on the Hilbert algorithm to obtain the parameter change of the environment under test.

Optical fiber distributed monitoring system and method

The present invention provides a sheet medium detection device, which comprises a light guide bar () provided on one side of a medium conveying passage () and provided with a plurality of reflection surfaces () arranged with Intervals along a length direction of the light guide bar, wherein each of the reflection surfaces () reflects the light within the light guide bar () to the other side of the medium conveying passage (); a plurality of light receivers (), each of which, being opposite to a reflection surface () of the light guide bar, is provided on the other side of the medium conveying passage (); and a point light source () provided at least on one end of the light guide bar along the length direction of the light guide bar, wherein each of the reflection surfaces () is provided obliquely to form an obtuse angle relative to the light guide bar () on the side where the point light source () locates. The present invention also provides a sheet medium processing device which comprises the detection device described above. The sheet medium detection device has a low cost and high adaptability.

Sheet medium detection device and sheet medium processing device

Growing community of inventors

Shandong, China

Yang Liu