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The original version of this article unfortunately contained a mistakes in Fig. 2B and Fig. 4A.

In recent years, the speed of urban development is faster and faster. With the acceleration of urbanization, the nature of land use and planning layout of urban planning area have changed dramatically. This leads to a rapid increase in the amount of urban construction information, and the efficiency of information processing and transmission. Urban planning approval is the core content of urban planning management, which directly affects urban construction and land development mode. The contents of road network analysis, demolition analysis and sunshine analysis in the urban planning system can not be fully displayed in the traditional two-dimensional GIS, so the system can not provi de a reliable basis for planning decision-makers. This paper presents a three-dimensional spatial analysis system for urban planning, which inherits the characteristics of three-dimensional GIS. At the same time, the system can analyze 3D data effectively. The system makes a full study of the more important aspects of urban planning, such as space measurement, demolition management, sunshine analysis, road network planning analysis, etc., and can analyze and audit the planning results.

Background Acquired resistance to therapeutic drugs has become an important issue in treating ovarian cancer. Studies have shown that the prevalent chemotherapy resistance (cisplatin, paclitaxel etc.) for ovarian cancer occurs partly because of decreased production of reactive oxygen species within the mitochondria of ovarian cancer cells. Main Body Nuclear erythroid-related factor-2 (Nrf2) mainly controls the regulation of transcription of genes through the Keap1-Nrf2-ARE signaling pathway and protects cells by fighting oxidative stress and defending against harmful substances. This protective effect is reflected in the promotion of tumor cell growth and their resistance to chemotherapy drugs. Therefore, inhibition of the Nrf2 pathway may reverse drug resistance. In this review, we describe the functions of Nrf2 in drug resistance based on Nrf2-associated signaling pathways determined in previous studies. Conclusions Further studies on the relevant mechanisms of Nrf2 may help improve the outcomes of ovarian cancer therapy.

A transmission reflection selective ultranarrow-band metamaterial filter based on electromagnetically induced transparency (EIT) operating at visible wavelengths is demonstrated theoretically and experimentally. The theoretical work starts with the design of an EIT structure with two separate resonance parts. Then the two resonance parts are connected and the hardness of the metamaterial filter is further increased by adding a glass substrate. Numerical simulation results show that the metamaterial filter not only exhibits ultranarrow-band transmission reflection selective spectra, but also exhibits wavelength tunable spectra for both transmission and reflection. To verify the simulation results, a filter sample is fabricated and the spectral responses are measured.

A nonpolarizing narrow band metamaterial transmission filter based on EIT operating at visible wavelengths is demonstrated theoretically and experimentally. The two separated resonance components that are able to generate EIT effect are connected using a SiO2 film layer and the hardness of the metamaterial filter is further improved by adding a glass substrate. The theoretical results are calculated by using the finite-difference time-domain simulation method and a metamaterial filter sample is fabricated and measured to verify the simulation spectrum. The full width at half-maximums of simulation and measured spectra are 0.74 nm and 1.61 nm respectively. Electric field distributions are also calculated to illustrate the physical mechanism. The novel method might be helpful to improve the processability of the narrow band metamaterial transmission filter, and also to further promote the applications of this kind of metamaterial filter.

As one of the main forms of urbanization in my country, urban construction is the process of building original natural or semi-natural ecosystems into urban artificial ecosystems from the perspective of ecology. It is the construction and replacement of ecosystem types and the process of encroachment. Urban planning must pay particular attention to the forward-looking nature of its ecological planning. While truly enhancing the city’s overall ecosystem service capabilities, it also prevents new ecological and environmental problems from being induced. Through theoretical analysis of the characteristics of ecosystem changes in the process of urban construction, combined with typical cases, several key issues in urban ecological planning have been summarized and condensed, and corresponding planning strategies and techniques have been proposed, with a view to providing ecological solutions for large-scale urban development in my country. Provide theoretical support for environmental protection work.

The paper selects a garden as a typical object to study urban garden plants, and uses methods such as video statistics, digital camera record analysis, manual counting, and questionnaire survey statistics (CTVM) to analyse the laws of garden plants in different time periods Based on the analysis and research, a mathematical model was established to explain the temporal and spatial behaviour of garden plants, so as to evaluate the landscape planning of urban gardens and provide a basis for studying the landscape planning of urban gardens. At the same time, the paper designs a web-based urban garden plant protection management system to improve the level of intelligent management of urban gardens.