摘要：【中文】本发明提供了一种新的布瓦西坦中间体及其制备方法，并且将该中间体应用到制备布瓦西坦中。该方法操作简单、环境友好、收率高，且光学纯度好。 【EN】The invention provides a novel intermediate of brivaracetam and a preparation method thereof, and the intermediate is applied to preparation of brivaracetam. The method has the advantages of simple operation, environmental protection, high yield and good optical purity.

摘要：【中文】本发明涉及一种天线装置及卡扣电机，卡扣电机包括电机壳体、电机输出轴与卡扣件。所述电机输出轴与所述卡扣件均设置于所述电机壳体的同一端面，所述电机输出轴穿过底座的安装板的轴孔，所述卡扣件卡接固定于所述安装板的卡接孔中。所述电机壳体与所述卡扣件均为绝缘体。上述的卡扣电机，在安装到底座上时，将电机输出轴穿过底座的安装板的轴孔中，电机壳体的同一端面的卡扣件将同步卡接固定于安装板的卡接孔中，如此能够快速地将卡扣电机装设于安装板上，操作较为方便，卡扣电机的安装效果较为稳固。此外，由于电机壳体与卡扣件均为绝缘体，从而能避免与金属化的底座相接触，使得能避免产生非线性接触引起天线互调指标不良的缺陷。 【EN】The invention relates to an antenna device and a buckle motor. The motor output shaft with the buckle spare all set up in motor casing's same terminal surface, the motor output shaft passes the shaft hole of the mounting panel of base, the buckle spare joint is fixed in the joint hole of mounting panel. The motor shell and the fastener are insulators. Foretell buckle motor when installing on the base, passes the motor output shaft in the shaft hole of the mounting panel of base, and the buckle spare of motor casing's same terminal surface is fixed in the joint hole of mounting panel with synchronous joint, so can install the buckle motor on the mounting panel fast, and it is comparatively convenient to operate, and the installation effect of buckle motor is comparatively firm. In addition, because motor casing and buckle spare are the insulator to can avoid contacting with the base of metallization, make to avoid producing the defect that nonlinear contact arouses the antenna intermodulation index to be bad.

摘要：【中文】本发明涉及一种电调装置及天线系统，电调装置包括金属屏蔽外壳、电机与安装板。金属屏蔽外壳的其中一端面上设有输出轴孔。电机与安装板均设置于金属屏蔽外壳内，电机的输出转轴通过输出轴孔伸出到金属屏蔽外壳外。安装板通过第一安装件固定设置于金属屏蔽外壳内。电机通过第二安装件固定设置于安装板上。第一安装件与第二安装件均设置于金属屏蔽外壳内。金属屏蔽外壳的输出轴孔的所在端面上不会出现外置的安装件，进而金属屏蔽外壳的输出轴孔的所在端面上不会存在与安装件相配合的安装孔，即不会有接触缝隙的存在，金属屏蔽外壳的输出轴孔的所在端面为一个光滑的表面，这样天线系统的主信号中不会出现杂波信号，能实现较好的互调指标。 【EN】The invention relates to an electric tuning device and an antenna system. An output shaft hole is arranged on one end face of the metal shielding shell. The motor and the mounting plate are both arranged in the metal shielding shell, and an output rotating shaft of the motor extends out of the metal shielding shell through an output shaft hole. The mounting panel passes through first installed part fixed setting in the metal shield shell. The motor passes through the fixed setting of second installed part on the mounting panel. First installed part and second installed part all set up in the metal shielding shell. External installed part can not appear on the place terminal surface in metal shielding shell's output shaft hole, and then can not exist on the place terminal surface in metal shielding shell's output shaft hole with installed part matched with mounting hole, can not have the existence in contact gap promptly, the place terminal surface in metal shielding shell's output shaft hole is a smooth surface, clutter signal can not appear in antenna system's the main signal like this, can realize better intermodulation index.

摘要：【中文】本发明公开一种高断裂伸长率PMI泡沫及其制备方法，包括如下步骤：(1)将30‑70重量份甲基丙烯腈、30‑70重量份甲基丙烯酸及相关助剂混合均匀，搅拌溶解；(2)将改性纳米粒子加入到反应液中，高速分散；(3)将反应分散液注入模具，反应得到聚合物板材；(4)将聚合物板材加热发泡得到一种高断裂伸长率PMI泡沫板。本发明制备得到的聚(甲基)丙烯酰亚胺泡沫的断裂伸长率，相对于常规泡沫明显提高，且热力学性能基本和改性前相当。 【EN】The invention discloses PMI foam with high elongation at break and a preparation method thereof, comprising the following steps: (1) uniformly mixing 30-70 parts by weight of methacrylonitrile, 30-70 parts by weight of methacrylic acid and related auxiliaries, and stirring for dissolving; (2) adding the modified nano particles into the reaction solution, and dispersing at a high speed; (3) injecting the reaction dispersion liquid into a mold, and reacting to obtain a polymer plate; (4) heating and foaming the polymer plate to obtain the PMI foam plate with high elongation at break. Compared with the conventional foam, the poly (methyl) acrylimide foam prepared by the invention has obviously improved elongation at break and basically equivalent thermodynamic property to that before modification.

摘要：【中文】本发明公开了一种天线、传动装置及切换机构，该切换机构包括传动件；选位单元，所述选位单元包括可转动设置于所述传动件上的蜗杆、与所述蜗杆传动配合的蜗轮、以及与所述蜗轮同步转动的主动齿轮；及驱动单元，所述驱动单元用于驱动所述传动件沿预设的轨迹往复移动。该切换机构能够可选择性地带动输出轴进行转动，且能够适应天线频段的增加而不会导致传动结构复杂；该传动装置该传动装置采用了上述切换机构，为下倾角的调节提供动力，简化了传动系统；该天线采用了上述传动装置，简化了传动系统，且能够适应天线频段的增加，有利于提高多频天线的工作性能的可靠性。 【EN】The invention discloses an antenna, a transmission device and a switching mechanism, wherein the switching mechanism comprises a transmission piece; the position selecting unit comprises a worm which is rotatably arranged on the transmission part, a worm wheel which is in transmission fit with the worm and a driving gear which synchronously rotates with the worm wheel; and the driving unit is used for driving the transmission piece to reciprocate along a preset track. The switching mechanism can selectively drive the output shaft to rotate, and can adapt to the increase of antenna frequency bands without causing the complex transmission structure; the transmission device adopts the switching mechanism to provide power for adjusting the downward inclination angle, so that a transmission system is simplified; the antenna adopts the transmission device, simplifies a transmission system, can adapt to the increase of the frequency range of the antenna, and is favorable for improving the reliability of the working performance of the multi-frequency antenna.

摘要：【中文】本发明公开了一种天线、传动装置及切换机构，该切换机构包括传动件；选位单元，选位单元包括可转动设置于传动件上的蜗杆、与蜗杆传动配合的至少两个蜗轮、以及与蜗轮一一对应的主动齿轮，主动齿轮与蜗轮之间设有第一传动轴，相邻两个主动齿轮之间纵向或/和横向错开纵向和横向错开；及驱动单元，驱动单元用于驱动传动件沿预设的轨迹往复移动。该切换机构能够可选择性地带动输出轴进行转动，且能够适应天线频段的增加而不会导致传动结构复杂；该传动装置该传动装置采用了上述切换机构，为至少两个下倾角的调节提供动力，简化了传动系统；该天线采用了上述传动装置，简化了传动系统，且能够适应天线频段的增加，有利于提高多频天线的工作性能的可靠性。 【EN】The invention discloses an antenna, a transmission device and a switching mechanism, wherein the switching mechanism comprises a transmission piece; the position selecting unit comprises a worm which is rotatably arranged on the transmission part, at least two worm wheels which are in transmission fit with the worm and driving gears which are in one-to-one correspondence with the worm wheels, a first transmission shaft is arranged between the driving gears and the worm wheels, and two adjacent driving gears are longitudinally or/and transversely staggered and longitudinally and transversely staggered; and the driving unit is used for driving the transmission piece to reciprocate along a preset track. The switching mechanism can selectively drive the output shaft to rotate, and can adapt to the increase of antenna frequency bands without causing the complex transmission structure; the transmission device adopts the switching mechanism to provide power for adjusting at least two declination angles, so that a transmission system is simplified; the antenna adopts the transmission device, simplifies a transmission system, can adapt to the increase of the frequency range of the antenna, and is favorable for improving the reliability of the working performance of the multi-frequency antenna.

摘要：【中文】本发明涉及一种从布瓦西坦原料药中基因毒性警示中间体杂质4‑卤代‑R‑3‑丙基丁酸酯的方法，包括以下步骤：1)将布瓦西坦原料药溶解在极性溶剂中；2)在步骤1)的溶液中加入与极性溶剂不相溶的非极性溶剂进行萃取，使得极性溶剂液相与非极性溶剂液相形成分层，并对两个液相进行分离；3)将步骤2)中得到的极性溶剂层进行减压浓缩干燥，使用惰性溶剂进行重结晶，得到布瓦西坦晶体。本发明得到的布瓦西坦纯度高，基因毒性警示杂质含量小于7.5ppm，符合FDA规定，满足高端市场需求。 【EN】The invention relates to a method for preparing a genotoxicity warning intermediate impurity 4-halogenated-R-3-propyl butyrate from a bulk drug of Buvalracetam, which comprises the following steps: 1) dissolving a bulk drug of the brivaracetam in a polar solvent; 2) adding a non-polar solvent which is not soluble with the polar solvent into the solution obtained in the step 1) for extraction, so that a polar solvent liquid phase and a non-polar solvent liquid phase are layered, and separating the two liquid phases; 3) concentrating and drying the polar solvent layer obtained in the step 2) under reduced pressure, and recrystallizing by using an inert solvent to obtain the brivaracetam crystal. The prepared brivaracetam has high purity, the genotoxicity warning impurity content is less than 7.5ppm, the requirements of FDA are met, and the high-end market requirements are met.

摘要：本发明实施例提供了一种网络检测方法、装置、电子设备及存储介质，应用于网络通信技术领域，所述方法包括：响应于网络检测的触发指令，确定待检测的目标对象，所述目标对象包括服务器以及至少一个资源对象；向所述服务器以及至少一个所述资源对象发送检测请求；接收所述服务器返回的与所述检测请求对应的第一采集数据，以及所述资源对象返回的与所述检测请求对应的第二采集数据；根据所述第一采集数据与所述第二采集数据进行网络检测，生成与终端对应的网络检测结果。

摘要：本发明公开了一种基于AI的课堂学生出勤人数统计方法，涉及智能视频监控技术领域；该方法实现步骤如下：构建课堂学生数据集；搭建轻量化YOLOv7网络模型；利用改进损失函数训练AI人员检测模型；将验证集输入AI人员检测模型中，通过实验训练得到最优权重；定义教室检测区域，采集关于检测区域的RTSP视频流；对采集的RTSP视频流进行滤波增益处理，降低信噪比，减少图像噪点，并将处理后的RTSP视频流输入到AI人员检测模型中，获得最终的检测结果；本发明大幅减少了深度学习模型的计算量和参数量，同时也提高了人员检测的准确率，满足课堂学生检测实时性要求，保障高校教学工作及其他相关工作的顺利进行。

摘要：本发明公开了一种带压密注浆和变深度的隔震沟，其特征在于所述隔震沟包括沟体以及沿所述沟体内壁面设置的一圈钢板桩，该圈所述钢板桩的外围设置有注浆加固区域，所述注浆加固区域由至少两圈压密注浆孔及其外围的水泥浆组合而成。本发明的优点是：隔震沟的沟深沿其长度方向呈变化状，减少了工程开挖量；沟内设置有沟体支撑围护结构，并利用压密注浆孔对沟体周围土体进行强化，保证了隔震沟的强度和安全性；还设置泄水管排空隔震沟周围的地下水，增强了隔震沟的隔震效果。