摘要：【中文】本发明公开了一种三电平功率变换电路及电压钳位方法，三电平功率变换电路包括Boost升压电路，Boost升压电路包括电感L1、二极管D3、二极管D4、开关管Q1、开关管Q2、飞跨电容Cf，还包括并联在二级管D4两端的电压钳位电路，电压钳位电路包括电容C2和开关S1，电容C2和开关S1串联连接。本发明可以给没有输入的Boost电路中飞跨电容Cf充电，降低二极管D4的电压应力；且该电压钳位电路中的电容C2容值大小可以根据飞跨电容Cf容值，输入电容C1容值、所选二极管D4允许的电压应力进行调整，非常灵活。 【EN】The invention discloses a three-level power conversion circuit and a voltage clamping method, wherein the three-level power conversion circuit comprises a Boost voltage boosting circuit, the Boost voltage boosting circuit comprises an inductor L1, a diode D3, a diode D4, a switching tube Q1, a switching tube Q2, a flying capacitor Cf and a voltage clamping circuit connected in parallel at two ends of a diode D4, the voltage clamping circuit comprises a capacitor C2 and a switch S1, and the capacitor C2 and the switch S1 are connected in series. The invention can charge the flying capacitor Cf in the Boost circuit without input, and reduce the voltage stress of the diode D4; and the capacitance value of the capacitor C2 in the voltage clamping circuit can be adjusted according to the capacitance value of the flying capacitor Cf, the capacitance value of the input capacitor C1 and the voltage stress allowed by the selected diode D4, and the voltage clamping circuit is very flexible.

摘要：【中文】本发明针对现有技术中电梯门板结构强度差、隔音效果差、清理繁琐的弊端，提供一种综合性能电梯门板，属于电梯技术领域，包括设有条形滑槽的门地槛，门地槛上设有两扇电梯门，所述电梯门包括门板，门板的左右两侧分别设有一个弯折部，其中一个电梯门上的其中一个弯折部上设有限位凹槽，另一个电梯门上的其中一个弯折部上设有限位凸条；所述门板上下两端分别固定设有封头；所述门板上还固定设有至少两根加强横档，相邻加强横档之间填充有吸音材料；所述门板下方固定设有能在条形滑槽内滑动的滑动连接件；所述滑动连接件上固定设有毛刷。本发明具有良好的结构强度，且具备良好的隔音效果以及能够实现自动清理门地槛上的条形滑槽。 【EN】The invention provides a comprehensive performance elevator door plate aiming at the defects of poor structure strength, poor sound insulation effect and complex cleaning of an elevator door plate in the prior art, belongs to the technical field of elevators, and comprises a door sill with a strip-shaped sliding groove, wherein two elevator doors are arranged on the door sill, each elevator door comprises a door plate, the left side and the right side of each door plate are respectively provided with a bending part, one bending part on one elevator door is provided with a limiting groove, and one bending part on the other elevator door is provided with a limiting convex strip; the upper end and the lower end of the door plate are respectively fixedly provided with a seal head; the door plate is also fixedly provided with at least two reinforcing crosspieces, and sound-absorbing materials are filled between the adjacent reinforcing crosspieces; a sliding connecting piece capable of sliding in the strip-shaped sliding chute is fixedly arranged below the door panel; and a hairbrush is fixedly arranged on the sliding connecting piece. The invention has good structural strength, good sound insulation effect and can realize automatic cleaning of the strip-shaped sliding groove on the doorsill.

摘要：【中文】本发明涉及废水处理领域，尤其涉及一种化工废水处理装置，包括箱体，箱体侧部设有上下并列设置的清液排出口和污垢排出口，箱体的顶部架设有絮凝剂播撒箱，絮凝剂播撒箱为圆形，絮凝剂播撒箱底部设有绕箱底中心呈等角度分布的多排出料孔，絮凝剂播撒箱内部安装有紧贴箱底的转盘，转盘上设有绕转盘中心呈等角度分布的多排圆孔，圆孔的数量与出料孔的数量相等，絮凝剂播撒箱的顶部设有驱动转盘转动的电机，转盘在电机的驱动下，能够使多排圆孔与絮凝剂播撒箱底部的多排出料孔对接或者错位，控制出料孔的开闭，将絮凝剂播撒箱内部的絮凝剂间隔、均匀、分散的投入箱体内，与污水进行反应，提高絮凝剂的处理效果。 【EN】The invention relates to the field of wastewater treatment, in particular to a chemical wastewater treatment device which comprises a box body, wherein a clear liquid discharge port and a dirt discharge port are arranged on the side part of the box body in parallel, a flocculant spreading box is erected at the top of the box body and is circular, a plurality of rows of discharge holes are formed in the bottom of the flocculant spreading box and are distributed at equal angles around the center of the bottom of the box body, a turntable tightly attached to the bottom of the box body is arranged in the flocculant spreading box, a plurality of rows of round holes are formed in the turntable and are distributed at equal angles around the center of the turntable, the number of the round holes is equal to that of the discharge holes, a motor for driving the turntable to rotate is arranged at the top of the flocculant spreading box, the turntable can enable the plurality of rows of round holes to be in butt joint or staggered with the plurality of rows of discharge holes in the bottom of the flocculant spreading box under the driving of the, reacts with sewage to improve the treatment effect of the flocculating agent.

摘要：【中文】本申请公开了一种芯层浆料、原纸、卡纸及卡纸的制备方法及造纸机，其中芯层浆料包括漂白化学热磨机械浆；其中，所述漂白化学热磨机械浆占所述芯层浆料的质量比至少为65％，以使得采用所述芯层浆料制作的纸张松厚度大于1.8。通过上述方式，本申请提供一种芯层浆料，该芯层浆料内包括漂白化学热磨机械浆，且漂白化学热磨机械浆占芯层浆料的质量比为65％，进而可以使得采用该芯层浆料制作的纸张的松厚度大于1.8，可以满足纸张的加工工艺需求。 【EN】The application discloses a preparation method of core layer slurry, base paper, paperboard and a paper machine, wherein the core layer slurry comprises bleached chemithermomechanical pulp; the bleached chemithermomechanical pulp accounts for at least 65% of the mass ratio of the core layer pulp, so that the bulk of paper made of the core layer pulp is larger than 1.8. In this way, the application provides a core layer slurry, including bleaching chemical thermomechanical pulp in this core layer slurry, and bleaching chemical thermomechanical pulp accounts for 65% of the mass ratio of core layer slurry, and then can make the bulk of the paper of adopting this core layer slurry preparation be greater than 1.8, can satisfy the processing technology demand of paper.

摘要：【中文】本申请公开了一种纸杯原纸用芯层浆料、纸杯原纸及其制备方法，该纸杯原纸用芯层浆料包括：浆料主体，所述浆料主体包括漂白化学热磨机械浆、漂白硫酸盐针叶木浆、漂白硫酸盐阔叶木浆和损纸；其中，所述漂白化学热磨机械浆绝干质量占所述浆料主体绝干质量的60％‑70％。通过上述方式，本申请能够改善使用该芯层浆料制成的纸杯原纸的挺度，提高纸杯原纸制成纸杯时的成型率。 【EN】The application discloses sandwich layer pulp for paper cup base paper, paper cup base paper and a preparation method thereof, and the sandwich layer pulp for paper cup base paper comprises the following components: a pulp body comprising bleached chemithermomechanical pulp, bleached sulfate softwood pulp, bleached sulfate hardwood pulp, and broke; wherein the oven dry mass of the bleached chemithermomechanical pulp accounts for 60-70% of the oven dry mass of the pulp main body. In this way, this application can improve the stiffness of the paper cup body paper that uses this sandwich layer thick liquids to make, improves the shaping rate when paper cup body paper is made the paper cup.

摘要：【中文】本申请公开了一种发泡杯用原纸的芯层浆料、制作工艺及发泡杯用原纸，属于造纸领域。本申请公开的发泡杯用原纸的芯层浆料包括：漂白阔叶硫酸盐浆，其游离度为220ml‑280ml，占芯层浆料绝干质量的百分比为15％‑35％；还包括漂白化学热磨机械浆，占芯层浆料绝干质量的百分比为50％‑60％，滑石粉，占芯层浆料绝干质量的百分比为4％‑6％；还包括漂白针叶硫酸盐浆，占芯层浆料绝干质量的百分比为2％‑5％，阳离子淀粉，占芯层浆料绝干质量的百分比为1.2％‑1.4％；还包括损纸，占芯层浆料绝干质量的百分比为5％‑25％。本申请公开的发泡杯用原纸的芯层浆料通过调配各组分的选择及性能，能够满足发泡工艺对发泡杯用原纸的性能要求，使原纸具有合适的透气性和较好的层间结合力。 【EN】The application discloses a core layer pulp of base paper for a foaming cup, a manufacturing process and base paper for the foaming cup, and belongs to the field of papermaking. The application discloses a core layer thick liquids of body paper for foaming cup includes: the free degree of the bleached broad-leaf sulfate pulp is 220ml to 280ml, and the percentage of the free degree of the bleached broad-leaf sulfate pulp in the oven-dry mass of the core layer pulp is 15 percent to 35 percent; the composite material also comprises bleached chemithermomechanical pulp which accounts for 50-60% of the oven-dried mass of the core layer pulp, and talcum powder which accounts for 4-6% of the oven-dried mass of the core layer pulp; the bleached needle leaf sulfate pulp accounts for 2 to 5 percent of the oven dry mass of the core layer pulp, and the cationic starch accounts for 1.2 to 1.4 percent of the oven dry mass of the core layer pulp; the paper also comprises broke, and the weight percentage of the broke in the core layer pulp is 5-25%. The core layer slurry of the base paper for the foam cup disclosed by the application can meet the performance requirement of the foaming process on the base paper for the foam cup by allocating the selection and the performance of each component, so that the base paper has proper air permeability and better interlayer bonding force.

摘要：【中文】本申请公开一种包装纸板用芯层浆料，所述芯层浆料包括漂白化学热磨机械浆，所述漂白化学热磨机械浆包括针叶机械浆，所述针叶机械浆占所述漂白化学热磨机械浆绝干质量的百分比为25％‑30％。本申请的芯层浆料加入针叶机械浆，针叶机械浆的纤维长度较长，抗张强度好，从而针叶机械浆的特点是松厚度较高、挺度较高，加入了25％‑30％的针叶机械浆的漂白化学热磨机械浆兼备具有较高的松厚度和强度，而含有该漂白化学热磨机械浆的芯层浆料改善芯层纤维的交织能力，提升芯层的Z向(厚度方向)强度，制备得到的纸板具有松厚度高，强度高，且兼备挺度的特点，从而该芯层浆料可用于制造白卡纸、食品卡纸等包装纸板的芯层，特别是适用于中高档食品包装纸板领域。 【EN】The application discloses sandwich layer pulp for packaging paperboard, the sandwich layer pulp includes bleaching chemical thermomechanical pulp, bleaching chemical thermomechanical pulp includes needle blade mechanical pulp, the needle blade mechanical pulp accounts for the percentage of bleaching chemical thermomechanical pulp absolute dry mass is 25% -30%. According to the method, the needle mechanical pulp is added into the core layer pulp, the fiber length of the needle mechanical pulp is long, and the tensile strength is good, so that the needle mechanical pulp is characterized by high bulk and high stiffness, 25% -30% of the bleached chemithermomechanical pulp is added, the bleached chemithermomechanical pulp has high bulk and high strength, the core layer pulp containing the bleached chemithermomechanical pulp improves the interweaving capacity of core layer fibers, the Z-direction (thickness direction) strength of a core layer is improved, the prepared paperboard has the characteristics of high bulk, high strength and stiffness, and therefore the core layer pulp can be used for manufacturing the core layers of packaging paperboards such as white cardboard and food cardboard, and is particularly suitable for the field of medium-high grade food packaging paperboards.

摘要：【中文】本申请公开了一种食品卡纸及制备方法，食品卡纸包括纸层和涂层，纸层包括依次层叠设置的底层、芯层和面层，涂层涂覆面层上。芯层由芯层原料制成，芯层原料包括漂白针叶硫酸盐浆、漂白阔叶硫酸盐浆及质量百分比为90～95％的漂白化学热磨机械浆,以制备得到食品卡纸的松厚度为1.70～1.75。通过提高漂白化学热磨机械浆用量的方式，可以提升食品卡纸的松厚度，从而提升食品卡纸的品质。 【EN】The application discloses food card paper and a preparation method thereof, the food card paper comprises a paper layer and a coating, the paper layer comprises a bottom layer, a core layer and a surface layer which are sequentially stacked, and the coating is coated on the surface layer. The core layer is made of core layer raw materials, wherein the core layer raw materials comprise bleached needle sulfate pulp, bleached broad-leaf sulfate pulp and 90-95% by mass of bleached chemithermomechanical pulp, and the bulk of the prepared food paperboard is 1.70-1.75. The bulk of the food paperboard can be improved by improving the dosage of the bleached chemithermomechanical pulp, so that the quality of the food paperboard is improved.

摘要：【中文】本发明涉及一种新型冠状病毒扩增引物及其应用。该引物包括至少一个能够识别新型冠状病毒N基因上的特异区域的寡核苷酸引物，新型冠状病毒N基因上的特异区域的序列范围包括新型冠状病毒参考毒株基因组28778‑28971的区域序列。采用该引物可以快速地从血液、唾液、痰液、空气等样本提取的RNA中的检测新型冠状病毒核酸，具有简便、快速，不需要大型仪器和专业人员培训的优点，可作为新型冠状病毒感染的肺炎疑似病例的初筛、环境检测方法，亦可作为临床诊断的重要参考。 【EN】The invention relates to a novel coronavirus amplification primer and application thereof. The primer comprises at least one oligonucleotide primer capable of identifying a specific region on the N gene of the novel coronavirus, and the sequence range of the specific region on the N gene of the novel coronavirus comprises the region sequence of the genome of a reference strain 28778-28971 of the novel coronavirus. The primer can be used for rapidly detecting the novel coronavirus nucleic acid from the RNA extracted from samples such as blood, saliva, sputum, air and the like, has the advantages of simplicity, convenience and rapidness, does not need large instruments and professional training, can be used as a preliminary screening and environment detection method for suspected pneumonia cases infected by the novel coronavirus, and can also be used as an important reference for clinical diagnosis.

摘要：【中文】本发明公开了一种矢量数据库增量更新方法及系统，所述方法包括以下步骤：确定待更新区域，基于待更新区域，从基础库中获取本底库数据；接收增量更新编辑，更新过程中自动生成要素的更新信息，所述更新信息包括更新操作类型、入库类型、更新时间和更新前后的要素标识；基于要素更新信息生成增量更新包，根据增量更新包对数据库执行增量更新。本发明实现了更新信息的实时自动记录，有助于准确回溯变化过程与变化来源。 【EN】The invention discloses a method and a system for updating increment of a vector database, wherein the method comprises the following steps: determining an area to be updated, and acquiring background library data from a basic library based on the area to be updated; receiving incremental updating edition, and automatically generating updating information of elements in the updating process, wherein the updating information comprises an updating operation type, a warehousing type, updating time and element identifiers before and after updating; and generating an incremental updating package based on the element updating information, and performing incremental updating on the database according to the incremental updating package. The invention realizes the real-time automatic recording of the updated information and is beneficial to accurately backtracking the change process and the change source.