摘要：【中文】本发明公开了一种五电平共地型单相非隔离光伏并网逆变电路及其调制方法，属于电力电子领域，逆变器通过给定的开关管驱动信号控制逆变电路中七个开关管的动作，产生五个电平的输出电压。在电网电压正半周通过开关管的动作，由光伏电池供电，光伏电池两端电压为U_dc，使飞跨电容C₁的电压稳定在U_dc/2不变，同时给飞跨电容C₂充电；在电网电压负半周，由飞跨电容C₂供电，飞跨电容C₁的电压稳定在U_dc/2不变。本发明主要优点是：1)光伏电池与电网共地，共模电压被钳位至0，共模电压保持不变，因此本拓扑可以完全消除漏电流；2)产生五个电平的输出电压，输出电压平台阶数越多，波形越趋近与正弦波，并网电流谐波越少；3)降低开关频率，减少开关损耗。 【EN】The invention discloses a five-level common-ground type single-phase non-isolated photovoltaic grid-connected inverter circuit and a modulation method thereof, belonging to the field of power electronics. The power is supplied by the photovoltaic cell through the action of the switching tube in the positive half cycle of the voltage of the power grid, and the voltage at the two ends of the photovoltaic cell is U_dcMake the flying capacitor C₁Is stabilized at U_dc2 is unchanged and simultaneously gives a flying capacitor C₂Charging; in the negative half cycle of the grid voltage, the flying capacitor C₂Power supply flying capacitor C₁Is stabilized at U_dcThe/2 is unchanged.The invention has the main advantages that: 1) the photovoltaic cell and the power grid are grounded, the common-mode voltage is clamped to 0, and the common-mode voltage is kept unchanged, so that the topology can completely eliminate leakage current; 2) generating output voltage with five levels, wherein the more the number of the output voltage platform is, the closer the waveform is to a sine wave, and the fewer the grid-connected current harmonic waves are; 3) the switching frequency is reduced, and the switching loss is reduced.

摘要：【中文】本发明公开了一种智慧水务供水仪表数据采集设备，涉及供水仪表数据采集领域，包括水表主体，所述水表主体的一端连接有输入管，且输入管的内部设置有过滤桶，所述过滤桶内部的一侧连接有第一滤网，且第一滤网的一侧连接有第二滤网，所述过滤桶的底端连接有密封盖，所述水表主体的内部设置有表芯，且表芯的顶端连接有表盘。本发明设置了水表主体、输入管、过滤桶、第一滤网、第二滤网、密封盖、螺栓、输入口，第一滤网与第二滤网通过安装在输入管的内部进行过滤工作，解决了水表主体内部没有过滤水中杂质和水垢的问题，具有避免水表主体内部堵塞的效果，且通过转动密封盖可以使得被拦截的杂质被清理出来，操作简单方便清理。 【EN】The invention discloses data acquisition equipment for an intelligent water service water supply instrument, which relates to the field of data acquisition of water supply instruments and comprises a water meter main body, wherein one end of the water meter main body is connected with an input pipe, a filter barrel is arranged in the input pipe, one side in the filter barrel is connected with a first filter screen, one side of the first filter screen is connected with a second filter screen, the bottom end of the filter barrel is connected with a sealing cover, a meter core is arranged in the water meter main body, and the top end of the meter core is connected with a dial plate. The water meter is provided with the water meter main body, the input pipe, the filter barrel, the first filter screen, the second filter screen, the sealing cover, the bolt and the input port, the first filter screen and the second filter screen are arranged inside the input pipe for filtering, the problem that impurities and scales in water are not filtered in the water meter main body is solved, the effect of preventing the inside of the water meter main body from being blocked is achieved, intercepted impurities can be cleaned out by rotating the sealing cover, and the operation is simple and convenient to clean.

摘要：【中文】本发明公开了一种船舶通讯终端可拆卸防水装置，涉及通讯终端技术领域，主要为了解决通讯终端容易进水而损坏的问题；该防水装置，包括一端开口设置的通讯终端外壳体和端盖体，所述通讯终端外壳体端口处设置有板状连接环，所述板状连接环边缘设置有向外侧延伸的环套，所述端盖体扣合在环套内部且端盖体边侧通过紧固机构与环套外壁相连接，所述板状连接环中部设置有端部向端盖体延伸的凸环，所述凸环与环套之间形成插接环槽，所述端盖体朝向通讯终端外壳体的端面上设置有插接于插接环槽内部的插环凸起，所述插接环槽侧壁上开设有与外部连通的透水孔。本发明结构简单，防水密封效果较好且便于拆卸维修，实用性较强。 【EN】The invention discloses a detachable waterproof device for a ship communication terminal, relates to the technical field of communication terminals, and mainly aims to solve the problem that the communication terminal is easy to damage due to water inflow; this watertight fittings, communication terminal shell body and end cover body including one end opening setting, communication terminal shell body port department is provided with the platelike go-between, the platelike go-between edge is provided with the ring cover that extends to the outside, the end cover body lock is connected with the ring cover outer wall through fastening device at the inside and end cover body avris of ring cover, platelike go-between middle part is provided with the bulge loop that the tip extends to the end cover body, form the grafting annular between bulge loop and the ring cover, it is protruding to be provided with the ring of pegging graft in the inside ring of pegging graft annular on the terminal surface of end cover body orientation communication terminal shell body, set up the hole of permeating water with outside intercommunication on the grafting annular. The waterproof sealing device is simple in structure, good in waterproof sealing effect, convenient to disassemble and maintain and high in practicability.

摘要：【中文】本发明公开了一种可控增强碳点对汞离子识别能力的方法，通过对碳点表面的官能团进行合理调控，弱化碳点对其他离子的识别能力，同时在碳点表面连接一段可以特异性识别汞离子的DNA序列，实现碳点对汞离子的选择性识别目的。该方法具有反应条件温和，操作简便，适用性强等优点，可广泛应用于化学、生物和材料科学等领域。 【EN】The invention discloses a method for controllably enhancing the recognition capability of carbon points on mercury ions, which weakens the recognition capability of the carbon points on other ions by reasonably regulating and controlling functional groups on the surfaces of the carbon points, and simultaneously connects a DNA sequence capable of specifically recognizing the mercury ions on the surfaces of the carbon points to realize the purpose of selectively recognizing the mercury ions by the carbon points. The method has the advantages of mild reaction conditions, simple and convenient operation, strong applicability and the like, and can be widely applied to the fields of chemistry, biology, material science and the like.

摘要：【中文】本发明提供了一种连续多层次地从文冠果鲜果壳中提取游离氨基酸、黄酮、皂苷、色素中的两种或更多种成分的方法，涉及农林固体废物资源化利用和农业生态环境技术领域。所述的提取方法包括果壳预处理、提取游离氨基酸、提取黄酮、任选地提取皂苷、进一步任选地提取色素，几个连续的提取工艺，统筹了氨基酸、黄酮、皂苷、色素各成分提取的流程顺序，且兼顾了各成分提取工艺之间的匹配性、兼容性和连续性，提高了文冠果鲜果壳综合利用率。 【EN】The invention provides a method for continuously and multi-layer extracting two or more components of free amino acid, flavone, saponin and pigment from fresh xanthoceras sorbifolia shells, and relates to the technical field of resource utilization of agricultural and forestry solid wastes and agricultural ecological environment. The extraction method comprises the steps of pretreatment of the shells, extraction of free amino acids, extraction of flavones, optional extraction of saponins, further optional extraction of pigments and a plurality of continuous extraction processes, integrates the flow sequence of the extraction of the amino acids, the flavones, the saponins and the pigments, considers the matching property, compatibility and continuity of the extraction processes of the components and improves the comprehensive utilization rate of the fresh xanthoceras sorbifolia shells.

摘要：【中文】本发明提供了一种从文冠果鲜果壳中连续提取粗蛋白质、多糖、纤维素的方法，具体而言，本发明提供了一种从文冠果鲜果壳中提取粗蛋白质、多糖、纤维素中的两种或三种成分的方法，涉及农林固体废物资源化利用和农业生态环境技术领域。所述的提取方法包括果壳预处理、提取粗蛋白质、提取多糖和任选地提取纤维素几个连续的提取工艺，统筹了粗蛋白质、多糖、纤维素各成分提取的流程顺序，且兼顾了各成分提取工艺之间的匹配性和兼容性，提高了文冠果鲜果壳综合利用率。 【EN】The invention provides a method for continuously extracting crude protein, polysaccharide and cellulose from fresh xanthoceras sorbifolia shells, in particular to a method for extracting two or three components of crude protein, polysaccharide and cellulose from fresh xanthoceras sorbifolia shells, and relates to the technical fields of resource utilization of agricultural and forestry solid wastes and agricultural ecological environment. The extraction method comprises a plurality of continuous extraction processes of fruit shell pretreatment, crude protein extraction, polysaccharide extraction and optional cellulose extraction, the flow sequence of the extraction of each component of crude protein, polysaccharide and cellulose is designed, the matching and compatibility among the extraction processes of each component are considered, and the comprehensive utilization rate of the fresh fruit shells of the shinyleaf yellowhorn is improved.

摘要：【中文】本发明公开一种聚烯烃基复合材料的制备方法，所述制备方法为：在搅拌状态下，120‑250℃下，将聚烯烃溶于过量溶剂中，然后向其中加入改质材料，搅拌混合，转入分离器将固体和液体分离，将分离得到的固体投入熔融设备，向其中加入添加剂，在110‑260℃下熔融预成型，然后加工成型；其中，所述溶剂为液体硅烷偶联剂、液体钛酸酯偶联剂、液体铝酸酯偶联剂、液体邻苯二甲酸类酯、液体对苯二甲酸类酯、液体偏苯三酸类酯、液体柠檬酸类酯、水杨酸、白油、对苯二胺、脂肪酸、马来酸酐中的至少一种。本发明制备得到的复合材料性能更加稳定，体积电阻率、热变形温度和断裂伸长率得到了改善。 【EN】The invention discloses a preparation method of a polyolefin-based composite material, which comprises the following steps: dissolving polyolefin in an excessive solvent at the temperature of 120-260 ℃ under the stirring state, adding a modifying material, stirring and mixing, transferring to a separator to separate solid and liquid, putting the separated solid into melting equipment, adding an additive, melting and preforming at the temperature of 110-260 ℃, and then processing and molding; wherein the solvent is at least one of liquid silane coupling agent, liquid titanate coupling agent, liquid aluminate coupling agent, liquid phthalate ester, liquid terephthalate ester, liquid trimellitate ester, liquid citric acid ester, salicylic acid, white oil, p-phenylenediamine, fatty acid and maleic anhydride. The composite material prepared by the method has more stable performance, and the volume resistivity, the thermal deformation temperature and the elongation at break are improved.

摘要：【中文】本发明公开一种聚烯烃母粒，按照重量百分比100%计，由以下重量百分比的原料组成：聚烯烃70‑90%，碳纳米材料10‑20%，均质化促进剂0‑5%，耐候稳定剂0‑5%；其中，所述均质化促进剂为马来酸酐接枝聚乙烯、马来酸酐接枝聚丙烯、氧化聚乙烯蜡、聚乙烯改性石蜡、苯乙烯接枝聚丙烯中的至少一种。同时，本发明还公开所述聚烯烃母粒的制备方法。本发明提供的聚烯烃母粒，以聚烯烃作为基材，通过物理混合或化学键连融入碳纳米材料、均质化促进剂和耐候稳定剂，制备的聚烯烃母粒具有良好的导电、传热或力学性能，通过调节聚烯烃和碳纳米材料的比例可以获得同系列的梯级化聚烯烃产品。 【EN】The invention discloses a polyolefin master batch, which comprises the following raw materials in percentage by weight according to 100 percent of weight: 70-90% of polyolefin, 10-20% of carbon nano material, 0-5% of homogenization accelerant and 0-5% of weather-resistant stabilizer; wherein the homogenizing accelerant is at least one of maleic anhydride grafted polyethylene, maleic anhydride grafted polypropylene, oxidized polyethylene wax, polyethylene modified paraffin and styrene grafted polypropylene. Meanwhile, the invention also discloses a preparation method of the polyolefin master batch. The polyolefin master batch provided by the invention takes polyolefin as a base material, and the carbon nano material, the homogenization accelerant and the weather-resistant stabilizer are blended through physical mixing or chemical bonding, so that the prepared polyolefin master batch has good electric conduction, heat transfer or mechanical properties, and the same series of graded polyolefin products can be obtained by adjusting the proportion of the polyolefin and the carbon nano material.

摘要：【中文】本发明公开了一种铝基金属材料低温扩散连接方法，通过化学抛光或机械抛光的方式制备待焊金属表面，将金属镓均匀涂敷在待焊金属表面，将两个或多个待焊面堆叠在一起，在真空环境或惰性气体保护环境下施加一定的压力，通过流经待焊金属的电流产生电阻热来缓慢加热待焊金属，到达预定温度后通过保温和缓慢冷却，实现待焊金属界面的冶金结合，Ga中间层的引入，实现低温扩散连接；中间层的均匀涂覆保障了界面力学性能均匀且再现性良好；电流加热的实现了能量集中，能耗低；采用较小的焊接压力(2MPa～5MPa)，保障了焊后散热装置的高精度，以上优点使得焊后扩散连接界面能够承受260℃而不发生界面熔化，在同等传热系数的条件下，热交换装置的生产速率显著提高。 【EN】The invention discloses a low-temperature diffusion bonding method of an aluminum-based metal material, which comprises the steps of preparing a metal surface to be welded in a chemical polishing or mechanical polishing mode, uniformly coating metal gallium on the metal surface to be welded, stacking two or more surfaces to be welded together, applying certain pressure in a vacuum environment or an inert gas protection environment, slowly heating the metal to be welded by generating resistance heat through current flowing through the metal to be welded, keeping the temperature and slowly cooling after reaching a preset temperature, realizing metallurgical bonding of a metal interface to be welded, and introducing a Ga intermediate layer to realize low-temperature diffusion bonding; the uniform coating of the intermediate layer ensures that the interface has uniform mechanical property and good reproducibility; energy concentration is realized by current heating, and energy consumption is low; the high precision of the post-welding heat dissipation device is guaranteed by adopting smaller welding pressure (2 MPa-5 MPa), the advantages enable the post-welding diffusion connection interface to bear 260 ℃ without interface melting, and the production rate of the heat exchange device is remarkably improved under the condition of the same heat transfer coefficient.

摘要：【中文】本发明公开了一种无人矿车安全监控方法及系统，属于无人驾驶技术领域，包括根据车辆的行驶信息和所述期望轨迹，对设定的待监控事项进行实时检测，得到待监控事项的当前检测结果，该设定的待监控事项包括车辆位置与期望轨迹的偏差、期望轨迹的合理性、纵向防碰撞、横向防碰撞以及速度；根据待监控事项的当前检测结果，对无人矿车行驶安全进行预警。本发明可全面评估无人驾驶矿车所处环境的安全风险等级，确保无人驾驶下矿车的行驶和作业安全。 【EN】The invention discloses a safety monitoring method and a system for an unmanned mine car, which belong to the technical field of unmanned driving, and comprise the steps of detecting set items to be monitored in real time according to the driving information of a vehicle and an expected track to obtain the current detection result of the items to be monitored, wherein the set items to be monitored comprise the deviation of the position of the vehicle and the expected track, the rationality of the expected track, longitudinal collision resistance, transverse collision resistance and speed; and early warning the running safety of the unmanned mine car according to the current detection result of the items to be monitored. The invention can comprehensively evaluate the safety risk level of the environment where the unmanned mine car is located, and ensure the running and operation safety of the mine car under the unmanned condition.