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TIME SYNCHRONIZATION METHOD, PROGRAMMABLE LOGIC DEVICE, SINGLE BOARD AND NETWORK ELEMENT

Provided are a time synchronization method, a programmable logic device, a single board and a network element. The method comprises: receiving, by a programmable logic device, a request message sent by a terminal; generating, by the programmable logic device, a time synchronization message according to the request message; and sending, by the programmable logic device, the time synchronization message to the terminal. By means of the technical solution, the present invention solves the problem of insufficient packet sending capability due to the fact that a time synchronization response must be completed by software interruption because of the special limitation of a CPU architecture. The programmable logic device completes the framing and processing of a time synchronization message, and directly completes the receiving and sending of the message, so that the message processing capability can be comprehensively improved. Moreover, the high-frequency accurate timing manner possessed by ...

充气沙池（爱心）

Sulfur recovery method and device

The invention discloses a sulfur recovery method and device, and belongs to the technical field of sulfur recovery in the coal chemical industry. According to the sulfur recovery device provided by the embodiment of the invention, an acid gas component analyzer and a ratio analyzer are arranged at the same time, the acid gas component of the ammonia-containing acid gas is analyzed through the acid gas component analyzer, the second concentration of the mixed gas in the second conveying pipeline is analyzed through the ratio analyzer, and when the acid gas component changes, the concentration of mixed gas of air and oxygen in the first conveying pipeline is adjusted in time through the first adjusting valve, and the concentration of mixed gas in the second conveying pipeline is adjusted in time through the second adjusting valve so that the sulfur recovery device keeps optimal air distribution operation, and the recovery rate of sulfur is improved.

METHOD AND SYSTEM FOR IMPROVING SYNCHRONIZATION PRECISION BASED ON PRECISION TIME PROTOCOL

Disclosed are a system and a method for improving synchronization precision based on a precision time protocol, for measuring in real time a delay value when a packet passes through a hardware delay node. When the packet is a precision time protocol packet, a time stamp pressed before the precision time protocol packet enters the hardware delay node is extracted; and corresponding delay compensation is performed according to the delay value and the time stamp. Compared with the prior art, the delay value measured by using the technical solution of the present invention is more precise, so that the time stamp can be correspondingly adjusted according to the measured precise delay value when the precision time protocol packet passes through the hardware delay node and the extracted time stamp, thereby improving the synchronization precision of the precision time protocol packet.

Vegetation performance testing device and evaluation method for regreening base material in ecologically fragile area

The invention discloses an ecologically fragile area regreening base material vegetation performance testing device and an evaluation method. The device comprises a sample chamber, a plant cultivation system, a base, a supporting frame, a data acquisition system and an evaluation system, the sample chamber is stably arranged on the base, the interior of the sample chamber is used for containing a to-be-detected base material, the plant cultivation system comprises auxiliary plant-growing pipes and a rainfall system and is used for protecting, cultivating and monitoring plant growth, the auxiliary plant-growing pipes are evenly distributed in the base material, and the rainfall system is used for rainfall of the to-be-detected base material. The rainfall system is stably fixed on the supporting frame, the supporting frame is stably fixed on the base, and the data acquisition system can monitor the characteristics and change conditions of the base material related to plant growth, the plant ...

Desulfurization and decarburization solvent suitable for low-pressure gas and application of desulfurization and decarburization solvent

The invention relates to a desulfurization and decarburization solvent suitable for low-pressure gas and application thereof, and relates to the technical field of environmental protection and gas purification, the desulfurization and decarburization solvent comprises a main desulfurization and decarburization component, an auxiliary desulfurization and decarburization component and water; the main desulfurization and decarburization component is an organic amine compound, and the auxiliary desulfurization and decarburization component is ionic liquid; by weight fraction, the weight percentage of the main desulfurization and decarbonization component is 20 wt%-40 wt%; and based on the weight fraction, the weight percentage of the desulfurization and decarbonization assisting component is 10wt%-20wt%. The desulfurization and decarbonization solvent provided by the invention realizes high-efficiency absorption of sulfur-containing gas and carbon dioxide at low pressure and low temperature ...

Prestress-interlocked bank slope repairing structure and construction method thereof

The invention discloses a pre-stress linkage bank slope repairing structure and a construction method thereof.The pre-stress linkage bank slope repairing structure comprises a plurality of slope protection bricks which are sequentially connected and interlocked, each slope protection brick is of a polyhedral structure and comprises a first side face, a second side face, a third side face, a fourth side face, a fifth side face and a sixth side face which are sequentially connected, the first side face and the fourth side face, the second side face and the sixth side face, and the third side face and the fifth side face are oppositely arranged, a first protruding buckle is arranged on the first side face, a first groove matched with the first buckle is correspondingly formed in the fourth side face, a second protruding buckle is arranged on the fifth side face, and a second groove matched with the second buckle is correspondingly formed in the fourth side face. Second grooves matched with ...

CLOCK SYNCHRONIZATION METHOD AND DEVICE

Provided in the present invention are a clock synchronization method and device. The method comprises: acquiring, by a first site in a first network, a transmission time point of n predetermined data transmitted by a second site in a second network, wherein the n predetermined data is transmitted to the first site from the second site along the same transmission path, and n ≥ 1; and synchronizing, by the first site, a first local clock of the first site with a second local clock of the second site according to the transmission time point of the n predetermined data, receiving the time point of the n predetermined data received by the first site, and a time delay, wherein the time delay is a time delay of predetermined time delay test data transmitted from the second site to the first site along the transmission path. Thereby, the present invention addresses the following problems in the related art when synchronizing a master network clock and a slave network clock: high cost, complex networking ...

TIME SYNCHRONIZATION METHOD AND DEVICE

Disclosed is a time synchronization method. The method comprises: a receive end receives a time information data packet transmitted by a transmit end; the receive end verifies the time information data packet and obtains time information according to the time information data packet; the receive end initiates time synchronization according to the obtained time information. Also disclosed is a time synchronization device. High precision of time synchronization between base station apparatuses is ensured, project costs and maintenance costs are reduced, and limitations on the networking environment are avoided.

Multidirectional spacing roof beam device of preventing falling of bridge

... 本实用新型公开了一种桥梁多向限位防落梁装置，包括梁体、固定设于桥墩上的凹形垫石、挡块结构和设在凹形垫石上的支座，所述梁体通过支座支撑设于桥墩上方，所述凹形垫石为凹槽成对对口布置的垫石，所述挡块结构上端固定在梁体底部，下端插入凹形垫石的凹槽内，所述挡块结构由挡块本体、预埋结构和锚固结构组成，所述预埋结构预埋在梁体底部混凝土内，所述挡块本体上端通过锚固结构与预埋结构相连，这样形成一种多向限位防落梁装置，与传统的防落梁装置相比，本实用新型结构仅仅垫石形状调整，不仅能实现横向限位，还增加了纵向限位功能，且几乎不增加成本，适用于不同桥梁跨径、不同地震峰值加速度等级，方便震后修复、易更换。 ...

Electrocardiogram monitoring teaching equipment

The utility model discloses electrocardiogram monitoring teaching equipment, and relates to the technical field of medical teaching. The electrocardiogram monitoring teaching equipment comprises a simulation prosthesis, a first induction piece, an adsorption body, a simulation pole piece and an adsorption magnet. The first induction piece is arranged on the adsorption body, and the first induction piece and the adsorption body are both arranged in the simulation prosthesis. The adsorption magnet is arranged on the simulation pole piece, and the adsorption magnet can magnetically adsorb the adsorption body. The first induction piece can send out a first induction signal when corresponding to the adsorption magnet. The electrocardiograph monitoring teaching equipment has the advantage of being low in loss.

Position reinforcing bar construction teaching mode of arranging is connected with frame construction in basis

... 本实用新型公开了一种基础与框架结构连接部位钢筋排布施工教学模型，包括坡型单柱独立基础、阶型单柱独立基础和双柱独立基础，均由外侧的框架柱嵌固端竖向主筋、框架柱中部竖向主筋、框架柱加密区箍筋、框架柱非加密区箍筋、框架柱嵌入部位箍筋、独立基础下部的X向钢筋、Y向钢筋构成，柱主筋采用绑扎连接情况下，根据框架柱嵌固端与独立基础钢筋空间排布与连接的规范要求绑扎成型。该模型制作简易、尺寸精确。能直观清晰地展示框架柱嵌固端与独立基础上部结构连接节点复杂的钢筋空间排布与连接施工情况。适用于建筑工程施工技术、预算与质量控制相关课程的现场教学。 ...

Pile formula that reduces road bed lateral displacement adds muscle structure

... 本实用新型公开了一种减小路基侧向位移的桩承式加筋结构，解决了现有承式加筋结构存在的路基侧向位移的问题，技术方案包括沿路基均匀布置的多根桩体，多根桩体顶面铺依次铺设有垫层和土工合成材料层，沿路基横向的相邻两根桩体的顶面之间沿水平向设有连系梁，所述垫层铺设在连系梁上。本实用新型结构简单、施工简便、可靠性高、可有效减小路基侧向位移。 ...

Composition for inhibiting beta-amyloid protein toxicity stress and promoting nerve cell axon growth and application thereof

The invention relates to a composition for inhibiting beta-amyloid protein toxicity stress and promoting nerve cell axon growth and application thereof, and the main active component of the composition comprises one or more of theaflavin digallate and optionally, theaflavin digallate derivatives. The composition inhibits Abeta25-35 induced nerve cell degeneration by regulating cell cycle exit, promoting an energy metabolism pathway and inhibiting 4-HNE, p62 and ubiquitination modified protein toxic aggregate and a formation pathway thereof, and prevents or treats neurodegenerative diseases in a manner of promoting nerve cell axon growth. The invention also discloses an application of the composition in prevention and treatment of neurodegenerative diseases, and the purpose of preventing or treating the neurodegenerative diseases is achieved mainly through a resting state repairing effect on nerve cells by anti-inflammatory, anti-oxidation and energy metabolism/caloric restriction promoting ...