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1. 发明申请

US20220248179A1 Method for identifying travel classification based on smartphone travel surveys 有权
公开(公告)号：US20220248179A1
公开(公告)日：2022-08-04
申请号：US17582127
申请日：2022-01-24
申请人： Shanghai Maritime University
发明人： Guangnian Xiao , Yu Xiao , Xianhua Wu , Bangping Gu , Ruinan Wang , Qiongwen Lu , Zihao Wang , Qing'an Cui , Jungang Shao
IPC分类号： H04W4/029 , G06K9/62 , G06N3/04
摘要： The present invention discloses a method for identifying travel classification based on smartphone travel surveys. The method takes individual volunteers as the object, GPS information collected by smartphones and instant recall verification features of respondents as the data source. First, travel features, individual features, and family features are determined by GPS data and questionnaire information of volunteers. Then, a training data set is determined by the equal proportion method. Finally, an artificial neural network combined with a particle swarm optimization algorithm is used to detect travel classification from the survey data. The method described in the invention can realize automatic identification of six travel classifications. It is conducive to replace the traditional resident travel survey with the advanced survey method under the environment of big data. At the same time, it provides data foundation for urban management and planning.

2. 发明申请

US20220186709A1 REINFORCEMENT LEARNING-BASED REAL TIME ROBUST VARIABLE PITCH CONTROL OF WIND TURBINE SYSTEMS 有权
公开(公告)号：US20220186709A1
公开(公告)日：2022-06-16
申请号：US17260323
申请日：2020-05-22
申请人： Shanghai Maritime University
发明人： Peng CHEN , Dezhi HAN
IPC分类号： F03D7/02 , F03D7/04
摘要： Disclosed are a system and a method for reinforcement learning-based real time robust variable pitch control of a wind turbine system. The system includes: a wind speed collecting module to collect wind speed values of a wind farm; a wind turbine information collecting module to collect a rotor angular speed; a reinforcement signal generating module to generate a reinforcement signal based on the collected rotor angular speed and the rated rotor angular speed; a variable pitch robust control module including an action network and a critic network, wherein the action network is configured to generate an action value based on the wind speed of the wind farm and the rotor angular speed and output the action value to the critic network; the critic network is configured to perform learning training based on the reinforcement signal and the action value, generate a cumulative return value and output the cumulative return value to the action network; and the action network performs learning training based on the cumulative return value to update the action value and output the updated action value; and a control signal generating module connected to the action network, configured to generate a corresponding control signal based on the received action value. The wind power generator adjusts the pitch angle based on the control signal, which realizes adjustment of the rotor angle speed and guarantees smooth and stable power output of the wind turbine.

3. 发明授权

US11326979B2 Push-swing combined wave generator 有权
公开(公告)号：US11326979B2
公开(公告)日：2022-05-10
申请号：US17075052
申请日：2020-10-20
申请人： Shanghai Maritime University
发明人： Gang Tang , Peng Lu , Congqiang Tang , Xiong Hu
IPC分类号： G01M10/00 , G09B9/06 , B63B71/20
摘要： The present invention discloses a push-swing combined wave generator, comprising a wave-generating fixing bracket, a servo motor, a driving wheel, a connecting rod, a first hydraulic cylinder, a second hydraulic cylinder, a first hydraulic cylinder push rod, a second hydraulic cylinder push rod, and a wave-generating plate. The sliding pins arranged in the wave-generating plate slide in the axial direction, and are switchable to connect either the first hydraulic cylinder push rod or the second hydraulic cylinder push rod with the wave-generating plate, and thus to render the push-swing combined wave generator to operate in respective locked state or unlocked state. The present invention integrates pushing and swinging, is capable of implementing horizontal pushing and swinging wave generating modes respectively, generating various wave types, and meeting requirements of various forms of wave generating.

4. 发明申请

US20220141007A1 QUANTUM COLOR IMAGE ENCRYPTING METHOD AND CIRCUIT BASED ON MODIFICATION DIRECTION 有权
公开(公告)号：US20220141007A1
公开(公告)日：2022-05-05
申请号：US17260286
申请日：2020-05-21
申请人： Shanghai Maritime University
发明人： Rigui ZHOU , Wenwen HU , Ping FAN , Rirong ZHOU , Ganbin WANG
IPC分类号： H04L9/08 , H04N1/46 , H04N1/44 , G06N10/80
摘要： Disclosed are a quantum color image encrypting method based on modification direction and corresponding circuit, respectively providing quantum modular circuits design for a parallel adder, a parallel subtractor, a comparator, a cyclic shift add 1, and a cyclic shift subtract 1; and based on these modular circuits, circuit for implementing quantum color image steganography is provided. From the complexity analysis of implementing quantum circuit for color image steganography, it is seen that for a two-dimensional quantum color image with 22n pixels and the R, G, and B channels of which are respectively represented by q number of quantum bits, the steganography algorithm is an efficient transformation method, and the circuit complexity is O(q2+n), which can hardly be achieved by classical geometric transformation. The disclosure is applicable for many practical image processing applications, e.g., transmitting secrete data via a public image; they all need an effective and secure steganography algorithm; besides, the present disclosure is significant in perfection and applications of image processing theories.

5. 发明申请

US20210164604A1 A 6-Dof Platform for Wave Compensation 有权
公开(公告)号：US20210164604A1
公开(公告)日：2021-06-03
申请号：US16632502
申请日：2018-03-12
申请人： Shanghai Maritime University
发明人： Gang Tang , Chao Hu , Xiong Hu
IPC分类号： F16M11/04 , B63B39/00 , F16M11/18 , F16M11/20 , F16M11/24 , F16M13/02
摘要： The present invention relates to the field of wave compensation equipment, and discloses a 6-Dof platform for wave compensation, comprising a soleplate, a 2R1T parallel unit, a 1R2T series unit and an upper platform. The soleplate is installed on a deck of a ship, the 2R1T parallel unit is installed on the soleplate, the 1R2T series unit is installed on the 2R1T parallel unit, and the upper platform is installed on the 1R2T series unit. The invention compensates 6-Dof motion of heave, roll, pitch, sway, surge and yaw of the ship under action of waves. The present invention has the advantages of simple structure, high carrying capacity, easy control and high precision in posture control.

6. 发明申请

US20220407385A1 Underwater Transmission Device with Lead Screw Sliding Block Mechanism 有权
公开(公告)号：US20220407385A1
公开(公告)日：2022-12-22
申请号：US17777318
申请日：2020-05-27
申请人： Shanghai Maritime University
发明人： Fengting Fu , Weihu Fu , Zhenzhong Chu , Zhiqiang Li , Da Wang , Fulun Wang
IPC分类号： H02K7/116
摘要： The present invention discloses an underwater transmission device with a lead screw sliding block mechanism, and relates to the technical field of underwater transmission devices. The device comprises a watertight motor and a lead screw sliding block mechanism A detection device is arranged in the watertight motor and comprises a planetary reducer and a rotary transformer. The lead screw sliding block mechanism comprise a base, a lead screw threaded rod and a sliding block. The watertight motor and the lead screw sliding block mechanism of the underwater transmission device with a lead screw sliding block mechanism are integrally designed. Therefore, the device has a compact structure. The rotary transformer can detect the absolute position of the sliding block, and facilitates debugging of the control system of the watertight motor. An instrument device can be fixed to the sliding block to accurately and linearly reciprocate.

7. 发明授权

US11437928B2 Adaptively modulated multi-state inverter system and modulating method thereof 有权
公开(公告)号：US11437928B2
公开(公告)日：2022-09-06
申请号：US17396715
申请日：2021-08-08
申请人： Shanghai Maritime University
发明人： Tianzhen Wang , Han Wang
IPC分类号： H02M7/53 , H02M7/537 , H02M7/48 , H02M7/521 , H02M1/00 , G06F17/16 , H02M1/084 , H02P27/10
摘要： The present invention provides an adaptively modulated multi-state inverter system, comprising: a split capacitor, four bridge arms and an isolation switch group, on each of the four bridge arms a pair of complementary power switch groups is arranged; the isolation switch group comprises four fuses and six bidirectional thyristors. The output branches of the first bridge arm, the second bridge arm and the third bridge arm are respectively connected in series with a fuse to output a three-phase voltage, and at three-phase output voltage side two shared auxiliary branches are arranged, one auxiliary branch starts from the fourth bridge arm output branch on which a fuse is connected in series and is then connected to the output terminal of the three-phase voltage via three bidirectional thyristors. The other auxiliary branch starts from the DC side feed branch from the midpoint of the split capacitor, and is connected with the output terminal of the three-phase voltage via three bidirectional thyristors respectively. The invention also provides a modulating method of the multi-state inverter system. The use of the adaptive modulating technology enables the multi-state inverter to have the functions of overcurrent protection, isolation of faulty bridge arms and fault-tolerant control on any single and double bridges.

8. 发明授权

US11358124B2 Preparation method of a nanometer metal oxide supported carrier based on anodic oxidation 有权
公开(公告)号：US11358124B2
公开(公告)日：2022-06-14
申请号：US16963420
申请日：2019-05-28
申请人： Shanghai Maritime University
发明人： Qun Qian , Daolun Feng , Yue Lin
IPC分类号： B01J21/00 , B01J21/06 , B01J35/00 , B01J37/34 , C02F1/32 , C02F1/72 , B01J37/04 , C02F101/30
摘要： Disclosed is a preparation method of a nanometer metal oxide supported carrier based on anodic oxidation, comprising: Step 1: adding electrolyte to a reaction pool, and fixing the cathode and the anode oppositely, wherein the cathode is a metal plate that is identical to the nano-metal oxide, and the anode is a carrier metal material; Step 2: stirring the electrolyte at a constant speed, wherein the revolution speed is not lower than 500 rpm; Step 3: switching power on; setting the output voltage between 10 v and 50 v; and subjecting the metal plate of the anode to anodic oxidation reaction, wherein metal oxide nanotubes/nano particles are generated on the surface; under the action of stirring, the metal oxide nanotubes/nano particles on the anode surface are dissolved and shed off into the electrolyte; under the action of the electric field force, the dissolved and shed-off nano fragments migrate towards the cathode and are adhered to the surface of the cathode material, thereby forming a nano-metal oxide film. The film preparation method according to the disclosure offers advantages such as mild condition, simple instrumentation, easy operation, and low cost; the prepared film has a good load effect such that the metal oxide can hardly be shed off.

9. 发明申请

US20220062863A1 A PREPARATION METHOD OF A NANOMETER METAL OXIDE SUPPORTED CARRIER BASED ON ANODIC OXIDATION 有权
公开(公告)号：US20220062863A1
公开(公告)日：2022-03-03
申请号：US16963420
申请日：2019-05-28
申请人： Shanghai Maritime University
发明人： Qun QIAN , Daolun FENG , Yue LIN
IPC分类号： B01J21/06 , B01J35/00 , B01J37/34 , B01J37/04 , C02F1/32 , C02F1/72
摘要： Disclosed is a preparation method of a nanometer metal oxide supported carrier based on anodic oxidation, comprising: Step 1: adding electrolyte to a reaction pool, and fixing the cathode and the anode oppositely, wherein the cathode is a metal plate that is identical to the nano-metal oxide, and the anode is a carrier metal material; Step 2: stirring the electrolyte at a constant speed, wherein the revolution speed is not lower than 500 rpm; Step 3: switching power on; setting the output voltage between 10v and 50v; and subjecting the metal plate of the anode to anodic oxidation reaction, wherein metal oxide nanotubes/nano particles are generated on the surface; under the action of stirring, the metal oxide nanotubes/nano particles on the anode surface are dissolved and shed off into the electrolyte; under the action of the electric field force, the dissolved and shed-off nano fragments migrate towards the cathode and are adhered to the surface of the cathode material, thereby forming a nano-metal oxide film. The film preparation method according to the disclosure offers advantages such as mild condition, simple instrumentation, easy operation, and low cost; the prepared film has a good load effect such that the metal oxide can hardly be shed off.

10. 发明申请

US20220060124A1 Adaptively modulated multi-state inverter system and modulating method thereof 有权
公开(公告)号：US20220060124A1
公开(公告)日：2022-02-24
申请号：US17396715
申请日：2021-08-08
申请人： Shanghai Maritime University
发明人： Tianzhen Wang , Han Wang
IPC分类号： H02M7/521 , H02M1/00 , H02M1/084 , G06F17/16
摘要： The present invention provides an adaptively modulated multi-state inverter system, comprising: a split capacitor, four bridge arms and an isolation switch group, on each of the four bridge arms a pair of complementary power switch groups is arranged; the isolation switch group comprises four fuses and six bidirectional thyristors. The output branches of the first bridge arm, the second bridge arm and the third bridge arm are respectively connected in series with a fuse to output a three-phase voltage, and at three-phase output voltage side two shared auxiliary branches are arranged, one auxiliary branch starts from the fourth bridge arm output branch on which a fuse is connected in series and is then connected to the output terminal of the three-phase voltage via three bidirectional thyristors. The other auxiliary branch starts from the DC side feed branch from the midpoint of the split capacitor, and is connected with the output terminal of the three-phase voltage via three bidirectional thyristors respectively. The invention also provides a modulating method of the multi-state inverter system. The use of the adaptive modulating technology enables the multi-state inverter to have the functions of overcurrent protection, isolation of faulty bridge arms and fault-tolerant control on any single and double bridges.

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