South China University of Technology

Shenzhen University

Guangdong Research Institute of Rare-metal

Sihui Dabowen Industrial Co., Ltd.

Min Zhu

Liuzhang Ouyang

Hui Wang

Jiangwen Liu

Xiaohua Bao

Xiangsheng Chen

Zhongchen Lu

Jiqiang Liu

Changqing Xia

Renzong Hu

Meiqin Zeng

Wei Chen

Kang Chen

Wei Wang

Hongzhi Cui

Hao Li

Chen Wang

Yong Zhao

Yan Gao

Cheng Tan

Weiliang Peng

Bin Yuan

Dengwei Chen

Houpu Liu

Shuangxi Guo

Tongzhao Luo

Fangming Xiao

Renheng Tang

De Min

Deqian Zhao

Xianyong Bao

Ruoming Duan

Huaijun Lin

Weihua Wang

Hao Zhong

The present invention discloses a compact vehicle-mounted hydrogen-oxygen generator. In the fluid path, the water circulation outlet of the water tank is in communication via one of the two one-way throttle valves with the water pump, which is in communication with the electrolytic tank of the hydrogen-oxygen generator, which is in communication with the water circulation inlet of the water tank through the other one-way throttle valve, and the gas outlet of the water tank is in communication with an engine air-inlet via the steam-water separator and the dry flame arrester in turn. In the circuit, the water pump and the electrolytic tank of the hydrogen-oxygen generator are connected in parallel to the ends of the positive and negative electrodes of the vehicle power supply, respectively; the switch, the fuse and the electrolytic tank of the hydrogen-oxygen generator are connected in series to the vehicle power supply. The present invention realizes high-efficiency electrolysis through a porous electrode rod with high specific surface area, high catalytic activity, high electrical conductivity and high surface energy (being hydrophilic and air-repellent), as well as the compact design of tightly nested stainless steel sleeves; on the premise of meeting the gas production requirements, the present invention reduces the volume and weight of the electrolytic tank; the present invention realizes the single electrolytic chamber assembly of the vehicle-mounted hydrogen-oxygen generator, and allows direct connection to a single sealed electrolytic chamber in the circuit and the fluid path, effectively avoiding the problem with the serial connection of multiple electrolytic chambers.

Compact hydrogen-oxygen generator

A method for monitoring resilience of a shield tunnel based on multi-source heterogeneous data is provided, including following steps: collecting the multi-source heterogeneous data and processing computer data, where the collecting the multi-source heterogeneous data includes: collecting a tunnel displacement u, a tunnel cross section convergence ΔD and a tunnel damage area S; and the processing computer data includes: S, performing data preprocessing; S, performing data processing, where the multi-source heterogeneous data preprocessed in step Sis processed to calculate a tunnel performance indicator P and a tunnel resilience indicator Re; S, determining tunnel status; S, performing manual argumentation; S, giving a remediation measure according to the status of the resilience of the tunnel in step S; S, storing and archiving processed data; and S, performing terminal outputting, where the data obtained in step Sis displayed and output through a plurality of terminals.

Method for monitoring resilience of shield tunnel based on multi-source heterogeneous data

The present invention relates to a hydrogen storage alloy, an electrode for a Ni-MH battery, a secondary battery, and a method for preparing the hydrogen storage alloy. The chemical composition of the hydrogen storage alloy is expressed by the general formula LaCeZrSmNiCoMnAl, where x, y, z, u, v, w are molar ratios, and 0.14≤x≤0.17, 0.02≤y≤0.03, 4.60≤z+u+v+w≤5.33, 0.10≤u≤0.20, 0.25≤v≤0.30, and 0.30≤w≤0.40. The atomic ratio of the metal lanthanum (La) to the metal cerium (Ce) is fixed at 3.0 to 3.2, which satisfies the requirements of the overcharge performance of the electrode material. A side elements are largely substituted by samarium (Sm) element, that is, the atomic ratio of Sm on the A side is 25.6% to 42%, so as to solve the problem of shortened cycle life caused by the small amount of cobalt (Co) atoms. The equilibrium pressure is adjusted by the change in the ratio of Sm to La and Ce to satisfy the requirements of the charge and discharge dynamic performance of the electrode material. The nucleation rate of the solidification process is improved by the addition of zirconium (Zr) to the A side at an atomic ratio of 2% to 3%. The Ni-MH battery negative-electrode material obtained from the hydrogen storage alloy has high overcharge resistance, and good high-rate discharge performance and cycle stability.

AB5-based hydrogen storage alloy, electrode for Ni-MH battery, secondary battery, and preparation method of hydrogen storage alloy

A method for preparing lithium borohydride by means of room temperature solid phase ball milling, comprising the following steps: uniformly mixing a magnesium-containing reducing agent and a lithium metaborate-containing reducing material under a non-oxidizing atmosphere at room temperature, performing solid phase ball milling, isolating and purifying to obtain lithium borohydride. The method has the advantages of having a simple process, having a controllable and adjustable reaction procedure, having mild reaction conditions, energy consumption being low, costs being low, and output being high, while creating no pollution, being safe and cyclically using boron resources, having important practical significance.

Method for preparing lithium borohydride by means of solid-phase ball milling at room temperature

A construction monitoring method and system for a V-shaped column in an underground foundation pit, a terminal and a storage medium can include the following steps: acquiring different stress-related data at a plurality of preset positions of stand columns in real time; and analyzing and judging whether the change rate of the stress-related data exceeds a preset change rate range or not or whether the stress-related data exceeds a preset stress-related data range or not.

Construction monitoring method and system for v-shaped column in underground foundation pit, terminal and storage medium

The present invention discloses a method for directly synthesizing sodium borohydride by solid-state ball milling at room temperature, which comprises: performing solid-state ball milling on a mixture of a reducing agent and a reduced material by using a ball mill under room temperature, and performing purification to obtain sodium borohydride. The reducing agent comprises one or more of magnesium, magnesium hydride, aluminum, calcium, and magnesium silicide. The reduced material is sodium metaborate containing crystallization water or sodium metaborate, or is a mixture of sodium metaborate containing crystallization water and sodium metaborate. The solid-state milling is performed in a mixed atmosphere of argon and hydrogen, or an argon atmosphere, or a hydrogen atmosphere. The present invention has a simple process, a controllable and adjustable reaction procedure, mild reaction conditions, low energy consumption, low costs, high yield, no pollution, good safety, and easy industrial production.

Method for directly synthesizing sodium borohydride by solid-state ball milling at room temperature

The invention discloses a preparation method of a WC cemented carbide with adjustable alignment of plate-shape grains. According to the theoretical composition of the cemented carbide, the weighed W powder is composed of two raw W materials with significantly different particle sizes in a certain mass ratio. Also graphite powder and Co powder are weighed. W&#x2014;C&#x2014;Co powder is subjected to planetary ball milling with controlled process parameters; then, after plasma-assisted ball milling, W&#x2014;C&#x2014;Co composite powder composed of small-sized lamellar W sheets and large-sized lamellar W sheet is obtained; Finally dense cemented carbide containing plate-shape WC grains is obtained by press molding of the ball milled power and in-situ carbonization through sintering at a high temperature. The invention not only provides simple preparation process with low energy consumption, but also can regulate the degree of orientated alignment of the plate-shape WC in the sintered block. Besides, the mechanical properties of the WC&#x2014;Co cemented carbide containing plate-shape WC grains are optimized, so that the cemented carbide has excellent overall mechanical properties.

Preparation method of a WC cemented carbide with adjustable alignment of plate-shape grains

Generating plasma by using dielectric barrier discharge and introducing a dielectric barrier discharge electrode bar into a high-speed vibrating ball milling tank requires that, on one hand, a solid insulation medium on the outer layer of the electrode bar can simultaneously bear high-voltage discharge and mechanical shock failure of the grinding ball, and on the other hand, the high-speed vibrating ball milling device can uniformly process the powder. The discharge space pressure is set to a non-thermal equilibrium discharge state with a pressure of about 10to 10Pa, discharge plasmas are introduced to input another kind of effective energy to the processed powder, so as to accelerate refinement of the powder to be processed and promote the alloying process and improve the processing efficiency and the effect of the ball mill.

Application method and device for cold field plasma discharge assisted high energy ball milled powder

Provided are a CaMg-based alloy hydride material for hydrolysis production of hydrogen, a preparation method therefor and a use thereof. The material has a general formula of CaMgMH, wherein M is Ni, Co or Fe, 1.5&#x2264;x&#x3c;2.0, 0&#x3c;y&#x2264;0.5, and 3&#x2264;z&#x3c;6. The preparation method for the material comprises the following steps: (1) stacking three pure metal block materials in a crucible, wherein a metal block material M is placed at the top; (2) installing the crucible in a high-frequency induction melting furnace, evacuating and introducing an argon gas; (3) starting the high-frequency induction melting furnace to heat at a low power first, then increasing the power to uniformly fuse same; and thereafter cooling with the furnace to obtain an alloy ingot, and hammer-milling to obtain a hydrogen storage alloy based on CaMg; and (4) hydrogenating the hammer-milled hydrogen storage alloy to obtain the material for hydrolysis production of hydrogen. The preparation method is simple and low in cost. The material can absorb hydrogen at normal temperature with a good hydrogen absorption performance. The prepared hydrogen is pure, and can be directly introduced into and used in a hydrogen fuel battery.

[object Object]

A method for preparing a magnesium-based hydrogen storage material, includes: a Mg&#x2014;Ce&#x2014;Ni family amorphous alloy is prepared by a rapid cooling process; the amorphous alloy is pulverized, so as to obtain a amorphous powder; the amorphous alloy is activated, so as to obtain a MgH&#x2014;MgNiH&#x2014;CeHfamily nanocrystalline composite; the abovementioned composite is carried out a hydrogen absorption and desorption cycle, then the composite is placed in a pure Ar atmosphere for passivation, finally, the passivated composite is oxidized, so as to obtain a MgH&#x2014;MgNiH&#x2014;CeH&#x2014;CeOfamily nanocrystalline composite.

Magnesium-based hydrogen storage material and method for preparing the same

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Guangzhou, China

Min Zhu