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97results about How to "Meet economic requirements" patented technology

Method and system for calculating least-cost routes based on historical fuel efficiency, street mapping and location based services

This disclosure outlines a method, which enables a vehicle driver to achieve increased fuel efficiency by implementing least-cost route planning based on terrain data and derived from advanced mapping, logging and location based services. Actual fuel efficiency is recorded and correlated by vehicle conditions, time of day and date, and then referenced to achieve the most accurate least-cost route plan for the intended destination.
Owner:SLINGSHOT IOT LLC

Method and system for calculating least-cost routes based on historical fuel efficiency, street mapping and location based services

This disclosure outlines a method, which enables a vehicle driver to achieve increased fuel efficiency by implementing least-cost route planning based on terrain data and derived from advanced mapping, logging and location based services. Actual fuel efficiency is recorded and correlated by vehicle conditions, time of day and date, and then referenced to achieve the most accurate least-cost route plan for the intended destination.
Owner:SLINGSHOT IOT LLC

Highway transportation scheduling method

The invention discloses a highway transportation scheduling method capable of meeting the demands of timeliness and economical efficiency and improving the vehicle scheduling efficiency. The highway transportation scheduling method comprises the steps of: 1) inputting all initial order information and vehicle information to form an initial order set and a vehicle set; 2) merging initial orders in the initial order set to obtain a virtual order, and forming a virtual order set by the residual initial orders after all virtual orders are merged; and 3) selecting a proper vehicle from the vehicle set to transport the virtual order and the initial order in the virtual order set, wherein a strategy that the faster the order is served and the better the effect is, or the least vehicles are utilized can be adopted for vehicle selection. Limited transport vehicle resources are utilized under a plurality of constraint conditions such as limitations of transportation time and distance condition, demands on working time of a driver and the maximal loads of the vehicles; and the vehicles can be reasonably arranged and an optimal path is planned to finish an appointed transportation task within specific time through the optimized scheduling scheme.
Owner:GUANGZHOU ZHIYING NETWORK TECH

Method of reinforcing soil body for inlet and outlet cave mouths of tunnel shield

The invention relates to a method in the technical field of construction engineering, in particular to a method of reinforcing soil body for inlet and outlet cave mouths of tunnel shield, which comprises the following steps of: employing a Robertson method to explore the soil body surrounding the tunnel at the inlet and outlet cave mouths of subways, confirming a bearable largest live load and the distribution situation through applying an engineering analogue method, drilling holes on the field, selecting horizontal rotary-spray grouting materials according to the physical-mechanical parameters of a reinforcing body; carrying out partial experimental spraying construction in the soil body to be reinforced on the field as well as selecting the reinforcing bodies meeting the piling strength construction requirements in the soil body and the piling diameters of a construction site. The method in the technical field of construction engineering comprehensively considers each factor and confirms the range of the reinforcing bodies needed for reinforcing the inlet and outlet cave mouths of subways through high-pressure horizontal rotary-spray grouting by the comprehensive method combined by analyzing and judging. The method in the technical field of construction engineering is simple, reliable, economic and practical, can be suitable for confirming the reinforcing ranges of various soil bodies, and provides an important technical guarantee for successfully finishing the reinforcing engineering on the inlet and outlet cave mouths of subways.
Owner:SHANGHAI JIAO TONG UNIV

Standby volume analytical method under coordinating dispatch mode of batch-type energy and conventional energy

The invention discloses a standby volume analytical method under a coordinating dispatch mode of batch-type energy and conventional energy. The method comprises the following five steps of calculating a standby past sample data region, obtaining similar cluster time intervals in a planed date, carrying out statics on a forecast output power deviation distribution of each time interval, obtaining a probability density function of the standby volume of wind energy, and calculating a rotation standby volume of a system under the coordinating dispatch mode of the batch-type energy and the conventional energy. With the adoption of the analytical method, according to a consideration of the coordinating dispatch of assembling units of the batch-type energy and the conventional energy, statics and analysis on data of past wind-power operation are carried out to form the current requirement on the rotation standby volume, safety guarantee is provided for the coordinating dispatch of the batch-type energy and the conventional energy, a reasonable standby volume is provided, and the realization of economical requirement on operation of a power system is facilitated. The method has the characteristics of low calculation intensity and strong adaptability, and is more suitable for popularization and application of connecting with dispatch mechanisms with larger power of wind power.
Owner:NARI TECH CO LTD +1

Electric-driving transmission device for electric vehicle and control method

The invention relates to an electric-driving transmission device for an electric vehicle and a control method. The electric-driving transmission device comprises a driving motor, a differential mechanism, a first brake, a second brake, a first planetary gear set and a second planetary gear set, wherein the first planetary gear set comprises a first sun wheel, a first planet carrier and a first gear ring, and the second planetary gear set comprises a second sun wheel, a second planet carrier and a second gear ring. An output shaft of a driving motor is sequentially connected with the first sunwheel and the second sun wheel. The first gear ring is connected with the first brake, and the second gear ring is connected with the second brake. The first planet carrier and the second gear ring are connected to form a whole, the second planet carrier is provided with an output support, and the output support is connected with an input shaft of the differential mechanism. Compared with the prior art, the electric-driving transmission device can achieve non power failure in the gear shifting process, is low in control complexity, has relatively low requirements for performance of the drivingmotor, and is high in practicability, compact in structure, small in size, low in weight and low in manufacturing cost.
Owner:上海屹驱新能源科技有限责任公司

Chance constraint planning based optimal configuration method of distributed energy source

The invention provides a chance constraint planning based optimal configuration method of a distributed energy source. The method comprises the following steps of building a comprehensive optimal configuration model of the distributed energy source; determining a chance constraint condition of the comprehensive optimal configuration model of the disturbed energy source; determining an energy storage system configuration principle of the comprehensive optimal configuration module of the distributed energy source; and figuring out the comprehensive optimal configuration model of the distributed energy source. With the method proposed by the invention, the acceptable capability of a power distribution net on the distrusted energy source is effectively improved, the energy efficiency target and the low carbon target of a planning scheme can be met, economic requirement also can be met, the problems of site selection and constant volume of the distributed energy sources in places with different resource levels and economic development degrees can be solved, the application of the distributed energy source at a large scale is ensured, and the environmental pollution and energy crisis caused by fossil energy can be effectively relieved.
Owner:CHINA ELECTRIC POWER RES INST +1

Multi-USV-group collaborative collision prevention planning method by considering communication condition

The invention belongs to the technical field of USV control, and in particular relates to a multi-USV-group collaborative collision prevention planning method by considering a communication condition.According to the multi-USV-group collaborative collision prevention planning method by considering the communication condition in the invention, in the case of or in the absence of communication, collision prevention planning is assisted by utilization of the intercommunication position, speed, heading information and the like of a communication module, and the static obstacle position, dynamic USV position, speed, heading information and the like detected by a radar in a certain range; therefore, multiple USVs avoid all static obstacles in a sailing process from the beginning to the end; theUSVs are not collided with each other; furthermore, large-angle steering and large-range acceleration and deceleration are avoided; and furthermore, a sailing path accords with economic requirements.The invention devotes to find a method for assisting collision prevention by sufficient utilization of the communication module and a radar detection module in the case of or in the absence of communication; and furthermore, the pressure of the system is relieved by making reasonable communication frequencies and communication contents.
Owner:HARBIN ENG UNIV

Graphene 3D printing wire rod and preparation method thereof

The invention relates to a graphene 3D printing wire rod and a preparation method thereof. The graphene 3D printing wire rod comprises functional graphene powder and thermoplastic resin. The preparation method comprises pouring thermoplastic resin powder into a width-adjustable metal mold cavity, carrying out stricking and heating to obtain a melt film base, spraying the functional graphene powder into the film base by a micropowder injection method, carrying out primary cooling and demolding to obtain graphene wire rod preforms with different widths, assembling the preforms in an order, putting the assembled body into a metal mold with a hole, carrying out extrusion under heating conditions so that the preforms deform and are fused, and carrying out secondary cooling to obtain the graphene 3D printing wire rod. The graphene 3D printing wire rod has good mechanical properties, conductive performances and flexibility and can easily realize large scale production and cost control.
Owner:CHINA THREE GORGES UNIV

Method and system for making light-blocking articles

A foamed, opacifying element having a target light blocking value (LBVT) and a target porous substrate is prepared by determining the light blocking value (LBVS) of the target porous substrate; calculating the LBVT-S difference; choosing a foamable aqueous composition; determining a dry coating weight for the chosen foamable aqueous composition (when foamed); and using the dry coating weight to form the single dry opacifying layer as the only layer disposed on the target porous substrate, such that the single dry opacifying layer has light blocking value that is equal to LBVT-S, ±10%. The chosen foamable aqueous composition comprises the essential components (a) through (e) described herein. The desired foamable aqueous composition can be chosen from a set of similar compositions to achieve the desired LBVT with the noted target porous substrate using suitable mathematical formula relating dry coating weight to light blocking value and a suitable data processor.
Owner:EASTMAN KODAK CO

Region coordinated control system and region coordinated control method based on active power distribution network

The invention discloses a region coordinated control system based on an active power distribution network. The power distribution network comprises a coordinated control region. The control system comprises source network coordinated controllers and a region coordinated controller, wherein the source network coordinated controllers are used for controlling the power output of distributed energy sources, monitoring the running states of the distributed energy sources and uploading the state information to the region coordinated controller, and the distributed energy sources are respectively provided with one source network coordinated controller; and the region coordinated controller is connected with all the source network coordinated controllers in the coordinated control region and used for receiving the states of the distributed energy sources, uploaded by all the source network coordinated controllers, and issuing control commands to the controllable distributed energy sources according to the states so as to dispatch the power of the corresponding distributed energy sources. The region coordinated control system realizes the efficient utilization of renewable energy sources in a self-government region and realizes an optimum region control target through the mutual coordination of the region coordinated controller and the source network coordinated controllers.
Owner:刘东

Multi-energy complementation comprehensive energy configuration optimization and operation method

The invention relates to a multi-energy complementation comprehensive energy configuration optimization and operation method and belongs to the field of resource configuration optimization. The multi-energy complementation comprehensive energy configuration optimization and operation method comprises the following steps: a step of determining a year's electrical load and heat load demand of a park; a step of determining a photovoltaic or wind power output characteristic curve value, an external power grid time-of-use electricity price, and a natural gas raw material price; a step of determining output simulation curves of all kinds of installed machines according to a machine installation plan of the park; a step of comparing external grid electricity price and cost of self-generation of electricity and determining an output order and output values of all installed machine units in the park according to price difference space between the external grid time-of-use electricity price andthe cost of self-generation of electricity, the heat load demand and a maximum output value of each installed machine unit in the park. The method disclosed in the invention provides decision supportfor improving multi-energy complementation optimal operation of the park; the method also helps minimize cost and enhance overall profit of multi-energy complementation of the park and is of great significance for promoting multi-energy complementation development of the park.
Owner:POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD

Optimal allocation of active distribution network resources based on Tianniuxiu algorithm

The invention discloses an optimal allocation of active distribution network resources based on the Tianniuxiu algorithm. The optimal allocation is characterized in that the time sequence of wind and photovoltaic distributed power generation output and load is considered, absorption of renewable energy is maximized through optimal allocation of the resources, active power is balanced, the Tianniuxiu algorithm is utilized for resource optimal allocation, the active power of each period is balanced according to the system demand and the economy principle, and reactive power compensation is performed to reduce power loss and voltage deviation to meet economic requirements. The optimal allocation has a certain practical value and can improve the safe and stable operation level of a system and the ability of the active distribution network to absorb the renewable energy.
Owner:NANCHANG UNIV

Portable wall space deformation monitoring device for reinforced soil retaining wall and monitoring method

The invention discloses a portable wall space deformation monitoring device for a reinforced soil retaining wall and a monitoring method. The portable wall space deformation monitoring device for the reinforced soil retaining wall comprises a flexible rail arranged on the fracture surface of a to-be-monitored reinforced soil retaining wall and a testing device arranged on the flexible rail and capable of moving along the flexible rail. The laser ranging technology is applied to the wall space deformation detecting field for a retaining wall, and the application of the laser ranging technology in the wall face deformation detecting practice is achieved, so that the prototype detecting work for the reinforced soil retaining wall is more convenient. Compared with the current monitoring and detecting, the wall space deformation detecting result for the reinforced soil retaining wall is more practical, more objective and more scientific. In addition, multi-purpose (beside from the reinforce soil retaining wall, measuring can be carried out on various flexible walls) in one device is achieved. The device is simple and capable of meeting the requirement of environmental protection, energy conservation and economical efficiency in the present society, so that the application prospect is extremely wide.
Owner:CHANGAN UNIV

Lowest equivalent electrovalence-of-system-based microgrid system design scheme and test platform

The invention provides a lowest equivalent electrovalence-of-system-based microgrid system design scheme and a test platform. Each subsystem of a microgrid system at least comprises a wind generator set, a photovoltaic set, an energy storage device, a water turbine set, a diesel engine set or a gas engine set. The structure of the microgrid system is determined through analyzing different load characteristics, natural resources and power supply types of the subsystems of the microgrid system; electric cost models of the subsystems of a microgrid are established; change parameters such as the investment cost of microgrid construction, the equivalent cost of power generation and load power demand increases are comprehensively considered to carry out distributed generation power supply selection and capacity configuration; and the microgrid system is established employing the lowest equivalent electrovalence of the system as the target, so that the microgrid system design scheme meeting the economic requirements is rapidly obtained; and the microgrid system test platform is formed by adopting an MVC mode.
Owner:中国东方电气集团有限公司

Strong-plugging hydrophobic high-performance water-based drilling fluid

The invention provides a strong-plugging hydrophobic high-performance water-based drilling fluid. The strong-plugging hydrophobic high-performance water-based drilling fluid comprises bentonite slurry, sodium hydroxide, a polymer coating inhibitor, a filtrate reducer, an anti-collapse agent, a lubricant, a plugging agent, an activity regulator and a tackifying and shear strength improving agent. According to the strong-plugging hydrophobic high-performance water-based drilling fluid of the invention, the polymer coating inhibitor, the filtrate reducer, the anti-sloughing agent, the lubricant,the blocking agent and the tackifying and shear strength improving agent are used as core treating agents, so that the well wall stability, the inhibition capability, the lithology carrying capabilityand the lubricating anti-sticking performance of the obtained water-based drilling fluid completely meet the requirements of a tight gas exploratory well and a development well in a Linxing-Shenfu block; the plugging of micro-nano hole seams is realized; the large-amplitude hydration expansion of shale is avoided; a good lubricating effect is achieved; the underground pressure supporting condition is effectively reduced; the purposes of improving the mechanical drilling speed, reducing the underground accident rate and saving the cost are achieved; the environment-friendly requirement can bemet; the product is a non-toxic pollution-free product; the cost of the product is low; and the economic requirement is met.
Owner:CHINA NAT OFFSHORE OIL CORP +2

Planetary cone-ring transmission

The invention provides a planetary cone-ring transmission, which is characterized by in-line arrangement of a three-gear single-row planetary gear transmission device and a cone-ring continuous variable transmission device and is provided with two forward gears and a reverse gear. When a vehicle runs at low speed and requires higher driving performance, a forward low speed gear of the three-gear single-row planetary gear transmission device is matched with the cone-ring continuous variable transmission device for use; when the vehicle runs at high speed and requires higher traveling performance, a forward high speed gear of the three-gear single-row planetary gear transmission device is matched with the cone-ring continuous variable transmission device for use; when the vehicle is backed, the reverse gear of the three-gear single-row planetary gear transmission device is matched with the cone-ring continuous variable transmission device for use. Therefore, the transmission can meet the requirement of the vehicle better.
Owner:李青山

Sewage treatment method

The invention provides a sewage treatment method which comprises steps as follows: a sewage blockage grid traps large suspended substances or floating substances in sewage, and a regulating tank regulates the water quantity and water quality of the sewage and performs preliminary precipitation; the sewage and aerobic zone reflux mixed liquor together pass through an anoxic zone to perform denitrification treatment, and pass through an aerobic zone to remove organic substances in the sewage, and the mixed liquor of the aerobic zone flows back to the anoxic zone through air stripping; and phosphorus is removed from the residual sewage after air stripping by adding an aluminum salt with a preset concentration and adopting a mixed feed zone using perforated aeration stirring, and the sewage which has passed through the mixed feed zone passes through a settling zone to perform sludge-water separation. The invention can simultaneously remove nitrogen and phosphorus in the sewage and implement low sludge yield; and the invention has the characteristic of small occupied area, is simple top operate and maintain, conforms to the requirements of the countryside for technical rationality and economical efficiency, and has wide application prospects.
Owner:SOUNDGRP CO LTD

Medium-low molecular weight rigid tackifying polymer, and preparation method and applications thereof

The invention provides a medium-low molecular weight rigid tackifying polymer. The medium-low molecular weight rigid tackifying polymer is obtained via micelle free radical polymerization of four monomers, acrylic acid, acrylamide, 2-acrylamido-2-methylpropane sulfonic acid, 2-acrylamido sodium alkyl sulfonate, wherein alkyl carbon number of the 2-acrylamido sodium alkyl sulfonate ranges from 16 to 24, the structure of the 2-acrylamido sodium alkyl sulfonate is represented by a formula in the invention, and R in the formula is used for representing C<14-22>H<29-45>. The invention also provides a preparation method and applications of the medium-low molecular weight rigid tackifying polymer in low-permeability reservoir oil displacement operation. The medium-low molecular weight rigid tackifying polymer possesses excellent water solubility; molecular weight can be adjusted according to injection requirements of low permeability reservoirs; compatibility is excellent; molecular chain rigidity of the medium-low molecular weight rigid tackifying polymer is relatively high; the medium-low molecular weight rigid tackifying polymer possesses relatively high solution apparent viscosity under relatively high mineralization degree injected water configuration conditions, is excellent in tackability, and is capable of satisfying economic requirements of most oil fields on polymer flooding, and increasing petroleum reservoir exploitation benefits.
Owner:PETROCHINA CO LTD

Water-based nano-fluid cutting fluid prepared via adding of carbon nanotube compound, and preparation method thereof

The invention belongs to the technical field of cutting fluid, and discloses a water-based nano-fluid cutting fluid prepared via adding of a carbon nanotube compound, and a preparation method thereof. The water-based nano-fluid cutting fluid comprises, by mass, 0.5 to 2% of the carbon nanotube compound, 1 to 2% of methyl stearate, 0.5% of sodium dodecyl benzene sulfonate, 0.5% of OP-10, 1 to 2% of sodium benzoate, 0.5% of 2-n-octy1-4-isothiazoline-3-one, 1% of triethanolamine, 0.1 to 0.5% of disodium ethylene diamine tetraacetate, and the balance deionized water. The carbon nanotube compound is a one-dimensional nanocomposite prepared via adding a lubricant additive into the cavity of carbon nanotube obtained via acidifying treatment. According to the preparation method, the carbon nanotube compound is taken as an additive of the water-based nano-fluid cutting fluid, so that cutting fluid thermal conductivity is improved; the carbon nanotube compound possesses certain dissolvability and excellent dispersibility in the cutting fluid, so that the lubrication performance of the water-based nano-fluid cutting fluid is improved. The water-based nano-fluid cutting fluid is used for processing, workpiece quality is improved at same working conditions, cutter wearing is reduced, and cutting fluid quality is increased.
Owner:SUZHOU INST OF INDAL TECH

Device based on injection pump and used for realizing emulsifying combustion of supercharged diesel engine and reducing NOx emission

The invention aims to provide a device based on an injection pump and used for realizing emulsifying combustion of a supercharged diesel engine and reducing NOx emission. The device comprises a low-pressure-stage pressurizer and a high-pressure-stage pressurizer; a high-pressure-stage turbine and a low-pressure-stage turbine are mounted on an air exhaust pipeline; a high-pressure-stage air compressor and a low-pressure-stage air compressor are mounted on an air inlet pipeline; and the high-pressure-stage turbine and the high-pressure-stage air compressor can be cut in and cut out through opening and closing of bypass valves as required. The injection pump is further arranged on the air inlet pipeline and is used for producing vacuum in a closed container and pumping water vapor into the air inlet pipeline, and a branch pipeline where the injection pump is located can be cut in and cut out by the aid of a two-position three-way reversing valve as required. With the device, arrangement of an air inlet way nozzle and other related devices can be avoided, relatively small structural alterations are made, and the water addition quantity can be changed flexibly according to the working condition of the diesel engine, so that the combustion temperature of the diesel engine can be reduced, and NOx emission can be reduced.
Owner:HARBIN ENG UNIV

Car driver type recognition method

The invention discloses a car driver type recognition method which comprises the following steps: 1, signal acquisition and processing: through a CAN equipment driving module and a CAN information processing module, a TCU processes data frames between the TCU and an ECU as well as those between the TCU and an ABS, so as to acquire real-time engine speed, accelerator, footbrake and car speed signals; 2, through an accelerator differential signal calculation module, the TCU averages the accelerator signals, so as to acquire an accelerator average signal; 3, through a drive type recognition fuzzycontrol system module, the TCU calculates a driver factor according to the real-time engine speed, accelerator, footbrake, key switch, handle position and car speed signals; 4, driver factor normalization processing: through a driver factor normalization module, the TCU processes the driver factor through normalization; and 5, through a driver factor filtration module, the TCU processes the normalized driver factor through filtration. By adoption of the car driver type recognition method disclosed by the invention, a driver type can be automatically recognized, and then the optimal gear for car driving can be adjusted.
Owner:CHONGQING TSINGSHAN IND

Laser initiation system

InactiveCN103673772ALower average detonation costLow priceBlasting cartridgesDetonatorFiber
The invention relates to a laser initiation system, and belongs to the field of civil explosive apparatuses production. The system is characterized by comprising a laser device adapting power supply (1), a laser device power supply numerical control system (2), a laser device array (3), a laser divider (4), optic fibers (5) and an initiating explosive-free laser detonator (6). A plurality of laser devices are arranged to form the laser device array, a power supply switch of each laser device in the laser device array is controlled by the power supply numerical control system, and the delaying time can be set. The laser generated by the laser device is guided into the laser divider by the optic fibers, and a plurality of laser-dividing optic fibers are guided out. A bayonet pin fixed at the head of each optic fiber is inserted into the bayonet of the initiating explosive-free laser detonator, and then the optic fibers just reach the high-laser sensitive explosive containing the laser absorbing matter in the initiating explosive-free laser detonator. After the power supply is engaged, the power supply numerical control system with set delaying time is started, the laser generated by the laser device array is guided into the laser divider by the optic fibers, and the divided laser can simultaneously initiate the initiating explosive-free laser detonator.
Owner:ANHUI UNIV OF SCI & TECH +1

Catalyst for hydrogenation production of aniline or derivatives thereof by nitrobenzene or derivatives thereof, and preparation method and application thereof

A catalyst for hydrogenation production of aniline or derivatives thereof by nitrobenzene or derivatives thereof is in a sulfide state and has the composition represented by Mx-Mo-Sy / Al2O3, wherein M is Fe, Ni, Cu, Co, W or a combination thereof, x is 0.1-1, and y is 1-4. The mass percentage content of the Mx-Mo-Sy in the catalyst is 5%-40%. The catalyst has the advantages of high conversion rate, good selectivity, low cost and mild reaction conditions.
Owner:SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI

Preparation method for 5-chloro-2-methyl-1,4-phenylenediamine

The invention relates to a preparation method for 5-chloro-2-methyl-1,4-phenylenediamine. 5-chloro-2-methyl aniline is used as a raw material and subjected to coupled reaction with aniline diazonium salt prepared through diazotization of an aniline substance to prepare an azo-compound; the azo-compound is subjected to hydrazine hydrate normal-pressure reduction and hydrogenolysis with the existence of a catalyst; in the later period of reduction, after the aniline substance taken off by reaction is subjected to water steaming out while reduction is performed; a methanol lysate is added to remove the catalyst so as to obtain a methanol water solution of 5-chloro-2-methyl-1,4-phenylenediamine; the obtained methanol water solution is subjected to adsorption, decoloring and edulcoration, and then after-treatment technologies of cooling crystallization, filtering, water washing, drying and the like to prepare high-purity 5-chloro-2-methyl-1,4-phenylenediamine; a mixture of the aniline substance subjected to steam distillation and recovery and water is separated and rectified, and then recycled in preparation of aniline diazonium salt. The preparation method has the characteristics of novel route, easily accessible raw material, high atom utilization ratio, conventional equipment, simple and convenient operation, little pollution, capability of realizing circular economy and the like.
Owner:ZHEJIANG DINGLONG TECH +1

A probability fatigue crack growth rate statistical analysis method based on Gaussian distribution

The invention belongs to the field of material fatigue reliability, and particularly relates to a probability fatigue crack growth rate statistical analysis method based on Gaussian distribution. According to the technical scheme, the probabilistic fatigue crack growth rate statistical analysis method based on Gaussian distribution comprises the following steps of 1) obtaining a fatigue crack growth rate median fitting curve of each single sample through a least square method principle; 2) under different stress intensity factor ranges K, performing statistical analysis on the local data, anddrawing a Gaussian distribution curve graph; 3) fitting a p-da / dN-delta K fitting curve with reliability of 99%; and 4) fitting a p-da / dN-delta K fitting curve with reliability of 1%. According to themethod, the probability distribution condition of the fatigue crack growth rate in different intervals can be truly and reasonably presented, and the distribution rule of the mechanical behavior of the material and the dispersity of test data is objectively reflected.
Owner:SHENYANG JIANZHU UNIVERSITY

Method for synthesis of (S)-rivastigmine through reductive amination

The invention provides a method for ynthesis of (S)-rivastigmine through reductive amination, belonging to the technical field of synthesis of chiral medicines in the pharmaceutical and chemical industry. The synthetic method of the invention comprises the following steps: with 3-hydroxyacetophenone as a raw material, carrying out a simple condensation reaction so as to realize high-yield preparation of 3-nitromethylethylformate acetophenone; then with 3-nitromethylethylformate acetophenone as a substrate, carrying out an asymmetric reductive amination reaction with benzhydrylamine under the catalysis of an Ir complex so as to obtain a chiral amine precursor with high enantioselectivity and high yield; and then carrying out deprotection and a methylation reaction so as to obtain (S)-rivastigmine with high enantioselectivity and high yield. The synthetic route of the method is short; the total yield of four steps can reach 80%; the enantioselective excess of (S)-rivastigmine can reach 98%; so the method has good industrial application prospects and practical application value.
Owner:SHANDONG NORMAL UNIV +1
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