摘要：【中文】本发明公开了一种自动化的不透水面范围遥感迭代提取方法，通过整合应用夜间灯光影像与Landsat TM影像，实现了对连续的大区域内不透水面覆盖信息的自动提取。本发明首先在夜间灯光影像上提取出不透水面聚集密度不同的城市区域、城市周边区域和非城市区域，然后在Landsat TM影像上，对应不同区域分别进行光谱指数统计与阈值分割，得到不透水面/非不透水面的初始分类样本，并用于训练分类器。最后在分类过程中迭代地整合光谱信息与空间信息自动地选取新的分类样本，直到分类结果稳定，完成不透水面范围信息提取流程。本发明能够实现精度稳定且高效的不透水面范围信息的自动提取。 【EN】The invention discloses an automatic impervious surface range remote sensing iterative extraction method, which realizes the automatic extraction of the impervious surface coverage information in a continuous large area by integrating and applying night light images and Landsat TM images. According to the method, urban areas, urban peripheral areas and non-urban areas with different impervious surface aggregation densities are extracted from a night light image, then spectral index statistics and threshold segmentation are performed on the Landsat TM image corresponding to different areas respectively, initial classification samples of the impervious surfaces/the non-impervious surfaces are obtained, and the samples are used for training a classifier. And finally, iteratively integrating the spectral information and the spatial information in the classification process to automatically select a new classification sample until the classification result is stable, thereby completing the extraction process of the range information of the impervious surface. The invention can realize the automatic extraction of the range information of the impervious surface with stable precision and high efficiency.

摘要：【中文】本发明涉及一种两性复合正渗透膜，其采用的多孔支撑膜为超亲水聚偏氟乙烯膜；多孔支撑膜上形成有聚酰胺层，聚酰胺层上形成有两性离子层。本发明中，两性离子层为胺基基团通过两性离子化反应形成，协同水蒸汽诱导相分离制备的聚偏氟乙烯膜的超亲水特性、儿茶酚衍生物修饰的氧化石墨烯的纳米水通道、两性离子化皮层的强水合作用和荷电性，在保持低的返混盐通量的同时，大幅度提高复合正渗透膜的水通量。 【EN】The invention relates to an amphoteric composite forward osmosis membrane, wherein a porous support membrane adopted by the membrane is a super-hydrophilic polyvinylidene fluoride membrane; a polyamide layer is formed on the porous support membrane, and a zwitterion layer is formed on the polyamide layer. According to the invention, the zwitterion layer is formed by an amino group through a zwitterionization reaction, and the superhydrophilic characteristic of the polyvinylidene fluoride membrane prepared by phase separation induced by water vapor, the nanometer water channel of the catechol derivative modified graphene oxide, and the strong hydration and charge performance of the zwitterionization skin layer are improved greatly while the low back-mixed salt flux is maintained.

摘要：【中文】本发明提供一种低损耗模块化多电平直流变压器的直流侧故障穿越方法，其中：变压器包括两个子系统和一个三相工频变压器。每个子系统分为三个相单元，每一个单元分上下桥臂，每个桥臂包括若干个串联的子模块，子模块由两个半桥结构、四个电容和两个续流二极管组成，第一个半桥包括第一开关模块和第二开关模块，第二个半桥包括第三开关模块和第四开关模块；第一开关模块的负极与第二开关模块的正极相连，第二开关模块的负极与第三开关模块的正极相连，第三开关模块的负极与第四开关模块的正极相连；在直流变压器一侧母线发生双极短路故障的情况下，封锁所有全控开关的触发脉冲，强制使电流切换路径，流过子模块内的电容，从而阻断故障电流。 【EN】The invention provides a direct current side fault ride-through method of a low-loss modular multi-level-to-level converter, which comprises the following steps: the transformer comprises two subsystems and a three-phase power frequency transformer. Each subsystem is divided into three phase units, each unit is divided into an upper bridge arm and a lower bridge arm, each bridge arm comprises a plurality of sub-modules which are connected in series, each sub-module consists of two half-bridge structures, four capacitors and two freewheeling diodes, the first half-bridge comprises a first switch module and a second switch module, and the second half-bridge comprises a third switch module and a fourth switch module; the negative electrode of the first switch module is connected with the positive electrode of the second switch module, the negative electrode of the second switch module is connected with the positive electrode of the third switch module, and the negative electrode of the third switch module is connected with the positive electrode of the fourth switch module; when a bus on one side of the direct current transformer has a bipolar short-circuit fault, the trigger pulses of all the full-control switches are blocked, and the current is forced to switch paths and flow through the capacitors in the sub-modules, so that the fault current is blocked.

摘要：【中文】本发明提供一种具备故障阻断能力的低损耗的模块化多电平直流变压器，包括两个子系统和一个三相工频变压器，每个子系统包括三个相单元，每一个相单元分上、下桥臂，每个桥臂包括若干个串联的子模块，所述子模块拓扑由两个半桥结构、四个电容和两个续流二极管组成，所述半桥结构中，第一个半桥包括第一开关模块和第二开关模块，第二个半桥包括第三开关模块和第四开关模块；所述第一开关模块的负极与所述第二开关模块的正极相连，所述第二开关模块的负极与所述第三开关模块的正极相连，所述第三开关模块的负极与所述第四开关模块的正极相连。本发明通过控制开关模块的开断即可实现直流侧短路的故障阻断，同时不会增加损耗。 【EN】The invention provides a low-loss modular multilevel DC transformer with fault blocking capability, which comprises two subsystems and a three-phase power frequency transformer, wherein each subsystem comprises three phase units, each phase unit is divided into an upper bridge arm and a lower bridge arm, each bridge arm comprises a plurality of serially connected submodules, the submodule topology comprises two half-bridge structures, four capacitors and two freewheeling diodes, in each half-bridge structure, a first half-bridge comprises a first switch module and a second switch module, and a second half-bridge comprises a third switch module and a fourth switch module; the negative electrode of the first switch module is connected with the positive electrode of the second switch module, the negative electrode of the second switch module is connected with the positive electrode of the third switch module, and the negative electrode of the third switch module is connected with the positive electrode of the fourth switch module. According to the invention, the fault blocking of the direct-current side short circuit can be realized by controlling the on-off of the switch module, and meanwhile, the loss is not increased.

摘要：【中文】本发明提供一种低损耗模块化多电平直流直流变换器的故障穿越方法，其中：变换器包括三个相单元，每一个相单元分三个桥臂，低压侧桥臂由若干个串联的子模块组成，子模块由两个半桥结构、四个电容和两个续流二极管组成，第一个半桥包括第一开关模块和第二开关模块，第二个半桥包括第三开关模块和第四开关模块；第一开关模块的负极与第二开关模块的正极相连，第二开关模块的负极与第三开关模块的正极相连，第三开关模块的负极与第四开关模块的正极相连；在直流输电系统中，当高压或低压侧发生双极短路故障时，关闭所有全控开关，强迫电流流经续流二极管，并通过电容，实现故障阻断。本发明可实现直流侧短路的故障阻断，同时不会增加损耗。 【EN】The invention provides a fault ride-through method of a low-loss modular multilevel direct-current converter, which comprises the following steps: the converter comprises three phase units, each phase unit is divided into three bridge arms, a low-voltage side bridge arm is composed of a plurality of serially connected sub-modules, each sub-module is composed of two half-bridge structures, four capacitors and two freewheeling diodes, a first half-bridge comprises a first switch module and a second switch module, and a second half-bridge comprises a third switch module and a fourth switch module; the negative electrode of the first switch module is connected with the positive electrode of the second switch module, the negative electrode of the second switch module is connected with the positive electrode of the third switch module, and the negative electrode of the third switch module is connected with the positive electrode of the fourth switch module; in a direct current transmission system, when a bipolar short circuit fault occurs on a high-voltage side or a low-voltage side, all full-control switches are closed, current is forced to flow through a freewheeling diode, and fault blocking is realized through a capacitor. The invention can realize the fault blocking of the direct current side short circuit without increasing the loss.

摘要：【中文】本发明公开了一种面向爆管监测的供水管网压力监测点布置方法，采用基于空间密度分簇和噪音点的聚类方法分析管网处于正常和爆管工况下的节点压力敏感度矩阵，进行节点聚类，划分管网监测分区，并关注生成的噪音点，再利用改进的基于参考向量的强度帕累托进化算法求解供水管网压力监测点的优化布置模型，生成更多的可行解空间，考虑监测点与爆管工况噪音点的重复和分簇的覆盖情况，得到最终的监测点布置方案。本发明方法将聚类算法与优化算法相结合，对比分析正常和爆管两种工况，并充分考虑到聚类噪音点的特殊性，可以更为全面地对供水管网进行监测。 【EN】The invention discloses a water supply network pressure monitoring point arrangement method facing pipe explosion monitoring, which comprises the steps of analyzing a node pressure sensitivity matrix of a pipe network under normal and pipe explosion working conditions by adopting a clustering method based on space density clustering and noise points, carrying out node clustering, dividing pipe network monitoring partitions, paying attention to generated noise points, solving an optimized arrangement model of the water supply network pressure monitoring points by utilizing an improved strength pareto evolution algorithm based on a reference vector, generating more feasible solution spaces, and considering repetition of the monitoring points and the noise points under the pipe explosion working conditions and the clustering coverage condition to obtain a final monitoring point arrangement scheme. The method combines the clustering algorithm with the optimization algorithm, analyzes two working conditions of normal and pipe explosion in a comparison manner, fully considers the particularity of clustering noise points, and can monitor the water supply network more comprehensively.

摘要：【中文】本发明提供一种低损耗模块化多电平直流直流变换器及其子模块，所述子模块拓扑由两个半桥结构、四个电容和两个续流二极管组成，所述半桥结构中，第一个半桥包括第一开关模块和第二开关模块，第二个半桥包括第三开关模块和第四开关模块；所述第一开关模块的负极与所述第二开关模块的正极相连，所述第二开关模块的负极与所述第三开关模块的正极相连，所述第三开关模块的负极与所述第四开关模块的正极相连。所述变换器包括三个相单元，每一个相单元分三个桥臂，其中，低压侧桥臂由若干个串联的所述低损耗模块化多电平直流直流变换器子模块组成。本发明通过控制开关模块的开断即可实现直流侧短路的故障阻断，同时不会增加损耗。 【EN】The invention provides a low-loss modular multilevel direct-current converter and a submodule thereof, wherein the submodule topology consists of two half-bridge structures, four capacitors and two freewheeling diodes, in the half-bridge structures, a first half-bridge comprises a first switch module and a second switch module, and a second half-bridge comprises a third switch module and a fourth switch module; the negative electrode of the first switch module is connected with the positive electrode of the second switch module, the negative electrode of the second switch module is connected with the positive electrode of the third switch module, and the negative electrode of the third switch module is connected with the positive electrode of the fourth switch module. The converter comprises three phase units, each phase unit is divided into three bridge arms, and a low-voltage side bridge arm consists of a plurality of low-loss modular multilevel direct-current converter sub-modules connected in series. According to the invention, the fault blocking of the direct-current side short circuit can be realized by controlling the on-off of the switch module, and meanwhile, the loss is not increased.

摘要：【中文】本发明提供一种低损耗模块化多电平换流器，包括三个相单元，每一个单元分上下桥臂，每个桥臂包括若干个串联的子模块，所述子模块由两个半桥结构、四个电容和两个续流二极管组成，第一个半桥包括第一开关模块和第二开关模块，第二个半桥包括第三开关模块和第四开关模块；所述第一开关模块的负极与所述第二开关模块的正极相连，所述第二开关模块的负极与所述第三开关模块的正极相连，所述第三开关模块的负极与所述第四开关模块的正极相连。本发明还提供一种上述换流器参数设计方法。本发明通过控制开关模块的开断即可实现直流侧短路的故障阻断，同时不会增加损耗。 【EN】The invention provides a low-loss modular multilevel converter, which comprises three phase units, wherein each unit is divided into an upper bridge arm and a lower bridge arm, each bridge arm comprises a plurality of serially connected submodules, each submodule consists of two half-bridge structures, four capacitors and two freewheeling diodes, the first half-bridge comprises a first switch module and a second switch module, and the second half-bridge comprises a third switch module and a fourth switch module; the negative electrode of the first switch module is connected with the positive electrode of the second switch module, the negative electrode of the second switch module is connected with the positive electrode of the third switch module, and the negative electrode of the third switch module is connected with the positive electrode of the fourth switch module. The invention also provides a parameter design method of the converter. According to the invention, the fault blocking of the direct-current side short circuit can be realized by controlling the on-off of the switch module, and meanwhile, the loss is not increased.

摘要：【中文】本发明提供一种低损耗模块化多电平换流器故障穿越方法，所述换流器包括三个相单元，每一个单元分上下桥臂，每个桥臂包括若干个串联的子模块，子模块由两个半桥结构、四个电容和两个续流二极管组成，第一个半桥包括第一开关模块和第二开关模块，第二个半桥包括第三开关模块和第四开关模块；第一开关模块的负极与第二开关模块的正极相连，第二开关模块的负极与第三开关模块的正极相连，第三开关模块的负极与第四开关模块的正极相连；利用逆阻型绝缘栅双极晶体管性质，在发生直流侧极间短路故障时，关断逆阻型绝缘栅双极晶体管组成的双向开关，阻断故障回路。本发明通过控制开关模块的开断即可实现直流侧短路的故障阻断，同时不会增加损耗。 【EN】The invention provides a fault ride-through method of a low-loss modular multilevel converter, wherein the converter comprises three phase units, each unit is divided into an upper bridge arm and a lower bridge arm, each bridge arm comprises a plurality of serially connected sub-modules, each sub-module comprises two half-bridge structures, four capacitors and two freewheeling diodes, the first half-bridge comprises a first switch module and a second switch module, and the second half-bridge comprises a third switch module and a fourth switch module; the negative electrode of the first switch module is connected with the positive electrode of the second switch module, the negative electrode of the second switch module is connected with the positive electrode of the third switch module, and the negative electrode of the third switch module is connected with the positive electrode of the fourth switch module; by utilizing the property of the reverse-resistance type insulated gate bipolar transistor, when a short-circuit fault occurs between direct-current side electrodes, a bidirectional switch consisting of the reverse-resistance type insulated gate bipolar transistor is turned off, and a fault loop is blocked. According to the invention, the fault blocking of the direct-current side short circuit can be realized by controlling the on-off of the switch module, and meanwhile, the loss is not increased.

摘要：【中文】本申请实施例公开了一种性别预测方法、装置、存储介质、以及电子设备，包括：获取各个用户针对终端的行为特征信息，基于各个用户对应的应用属性信息构建异构图，异构图包括多个节点，节点之间的连接表征用户与应用程序之间的映射关系，从异构图中挖掘得到应用特征信息，应用特征信息中包括按照预设元路径对应的预设节点类型顺序进行排列的信息，将应用特征信息、每个用户对应的多个多媒体信息、以及每个用户对应的实际性别信息，作为性别预测网络模型的当前输入信息，基于当前输入信息训练性别预测网络模型，得到训练后网络模型，并基于训练后网络模型预测待预测用户的性别信息。该方案可以提升性别预测的准确性。 【EN】The embodiment of the application discloses a method and a device for predicting the performance, a storage medium and an electronic device, comprising the following steps: the method comprises the steps of obtaining behavior characteristic information of each user aiming at a terminal, constructing a heterogeneous graph based on application attribute information corresponding to each user, enabling the heterogeneous graph to comprise a plurality of nodes, enabling connection among the nodes to represent a mapping relation between the user and an application program, mining application characteristic information from the heterogeneous graph, enabling the application characteristic information to comprise information which is arranged according to a preset node type sequence corresponding to a preset meta path, enabling the application characteristic information, a plurality of pieces of multimedia information corresponding to each user and actual gender information corresponding to each user to serve as current input information of a gender prediction network model, training the gender prediction network model based on the current input information, obtaining the trained network model, and predicting gender information of the user to be predicted based on the trained network model. The scheme can improve the accuracy of gender prediction.