Constraint Mechanism of Environmental Regulation on Carbon Emission of Heavy Industry in Chengdu-Chongqing Region of China

Regional differences and development heterogeneity lead to an unbalanced distribution of heavy industry in Chengdu-Chongqing region of China. Under the background of low-carbon development, clarifying the constraint mechanism of environmental regulations on carbon emissions of heavy industry becomes more important to solve prominent problems of resources and the environment. In this work, literature analysis, comparative analysis and statistical induction are carried out to illustrate a constraint mechanism of environmental regulation on carbon emission. Based on literature reports and government yearbook data, the impacts of environmental regulations on carbon emissions of heavy industry in Chengdu-Chongqing region are studied. Analysis and demonstration are carried out from four dimensions: corporate identity, technological progress, policy constraints, and government supervision. The predicament of environmental regulation affecting heavy industry carbon emission reduction is expounded and puts forward reasonable policy suggestions. The research results can enrich the theory of environmental regulation, and provide policy suggestions for optimizing the green transformation of heavy industry

Experimental analysis of 3D flow structures around a floating dike

Floating dikes have several advantages over spur dikes including less influence on riverine sediment transport, bed topography, and ecosystems, and a good adaptability to fluvial conditions. Despite these advantages, floating dikes have not been used in many river regulation schemes due to the limited understanding of the 3D flow structures around floating dikes. In this study, a series of experiments were conducted to investigate the 3D flow structures around floating dikes. Results show that, after installing a floating dike on one side of a flume, the surface water flow is deflected to the opposite side of the flume, and a backflow develops around the outer and downstream side of the dike, where both the vertical turbulent intensity and the absolute magnitude of the Reynolds stress are relatively large. Due to the blocking effect of the dike, the cross-sectional area decreases, causing an increase in velocities below and alongside the dike, as well as a decrease in velocities upstream of the dike. Increasing the submerged depth or length of the dike results in an increase in flow velocity adjacent to the dike, as well as an increase in the vertical or lateral scale of the backflow. On the contrary, increasing the dike thickness leads to a weakening or disappearance of the backflow, along with a decrease in the acceleration rate of flow adjacent to the dike

Study on the Effect of Regional Water Pollution—Take Huaxi River in Chongqing as an Example

Water pollution management plays a crucial role in China’s ecological environment development. It has evolved from being solely the responsibility of the government to a collaborative effort involving multiple entities. This paper presents findings from a field survey conducted around the collaborative capacity and effectiveness of wastewater treatment in Huaxi River, Chongqing. The study collected 427 valid questionnaires and employed SPSS26.0 software and AMOS24.0 software, utilizing structural equation modelling and regression analysis to verify the relationship between the variables. The results highlight that synergy mechanism acts as a mediating variable between synergy capability and synergy governance effect, underscoring the role of mechanism in the relationship between capability and governance effect. The conclusion emphasizes the importance of enhancing synergistic capacity and synergistic mechanism to effectively promote synergistic governance effect in the water pollution management of Huaxi River in Chongqing. This can be achieved by improving the abilities of multiple stakeholders in managing water pollution, enhancing cooperation among parties, and encouraging participation of social organizations, the public, and enterprises in the management process to achieve sustainable development of ecological civilization

The compilation of 1∶500000 seismotectonic map of the Ordos active block and boundary zone

The 1∶500000 seismotectonic map of the Ordos active block and boundary zone is a special achievement of the national key research and development project “Research on dynamic model and strong earthquake risk of Ordos active block boundary zone” . Taking the Ordos active block and boundary zone as the mapping scope, this map refers to the compilation standards and database standards of seismotectonic map in the seismic industry, and carries out high-resolution image interpretation on the basis of systematically collecting and collating geographic information, geology, active tectonics, earthquake, geophysics and other data. It absorbs the latest research results of the project and builds the basic database required for mapping. Through data vectorization, stratigraphic boundary modification, fault modification, map modification, the 1∶500000 seismotectonic map of the Ordos active block and boundary zone was compiled. This map reflects the boundary zone of Ordos active blocks such as Yinchuan Basin Helan Mountains, arc structure bundle, Weihe Basin, Shanxi graben system, Hetao Basin and the seismic structure of adjacent blocks, the geometric and kinematic images of active tectonics in the Ordos block and boundary zone were improved

The HASHTAG Project: The First Submillimeter Images of the Andromeda Galaxy from the Ground

Observing nearby galaxies with submillimeter telescopes on the ground has two major challenges. First, the brightness is significantly reduced at long submillimeter wavelengths compared to the brightness at the peak of the dust emission. Second, it is necessary to use a high-pass spatial filter to remove atmospheric noise on large angular scales, which has the unwelcome side effect of also removing the galaxy\u27s large-scale structure. We have developed a technique for producing high-resolution submillimeter images of galaxies of large angular size by using the telescope on the ground to determine the small-scale structure (the large Fourier components) and a space telescope (Herschel or Planck) to determine the large-scale structure (the small Fourier components). Using this technique, we are carrying out the HARP and SCUBA-2 High Resolution Terahertz Andromeda Galaxy Survey (HASHTAG), an international Large Program on the James Clerk Maxwell Telescope, with one aim being to produce the first high-fidelity high-resolution submillimeter images of Andromeda. In this paper, we describe the survey, the method we have developed for combining the space-based and ground-based data, and we present the first HASHTAG images of Andromeda at 450 and 850 μm. We also have created a method to predict the CO(J = 3-2) line flux across M31, which contaminates the 850 μm band. We find that while normally the contamination is below our sensitivity limit, it can be significant (up to 28%) in a few of the brightest regions of the 10 kpc ring. We therefore also provide images with the predicted line emission removed

The DESI One-Percent Survey: Exploring the Halo Occupation Distribution of Luminous Red Galaxies and Quasi-Stellar Objects with AbacusSummit

We present the first comprehensive Halo Occupation Distribution (HOD) analysis of the DESI One-Percent survey Luminous Red Galaxy (LRG) and Quasi-Stellar Object (QSO) samples. We constrain the HOD of each sample and test possible HOD extensions by fitting the redshift-space galaxy 2-point correlation functions in 0.15 < r < 32 Mpc/h in a set of fiducial redshift bins. We use AbacusSummit cubic boxes at Planck 2018 cosmology as model templates and forward model galaxy clustering with the AbacusHOD package. We achieve good fits with a standard HOD model with velocity bias, and we find no evidence for galaxy assembly bias or satellite profile modulation at the current level of statistical uncertainty. For LRGs in 0.4 < z < 0.6, we infer a satellite fraction of fsat = 11+-1%, a mean halo mass of log10 Mh = 13.40+0.02-0.02, and a linear bias of blin = 1.93+0.06-0.04. For LRGs in 0.6 < z < 0.8, we find fsat = 14+-1%, log10 Mh = 13.24+0.02-0.02, and blin = 2.08+0.03-0.03. For QSOs, we infer fsat = 3+8-2%, log10 Mh = 12.65+0.09-0.04, and blin = 2.63+0.37-0.26 in redshift range 0.8 < z < 2.1. Using these fits, we generate a large suite of high-fidelity galaxy mocks. We also study the redshift-evolution of the DESI LRG sample from z = 0.4 up to z = 1.1, revealing significant and interesting trends in mean halo mass, linear bias, and satellite fraction.Comment: Submitted to MNRAS, comments welcom

Robust estimation of bacterial cell count from optical density

Optical density (OD) is widely used to estimate the density of cells in liquid culture, but cannot be compared between instruments without a standardized calibration protocol and is challenging to relate to actual cell count. We address this with an interlaboratory study comparing three simple, low-cost, and highly accessible OD calibration protocols across 244 laboratories, applied to eight strains of constitutive GFP-expressing E. coli. Based on our results, we recommend calibrating OD to estimated cell count using serial dilution of silica microspheres, which produces highly precise calibration (95.5% of residuals &lt;1.2-fold), is easily assessed for quality control, also assesses instrument effective linear range, and can be combined with fluorescence calibration to obtain units of Molecules of Equivalent Fluorescein (MEFL) per cell, allowing direct comparison and data fusion with flow cytometry measurements: in our study, fluorescence per cell measurements showed only a 1.07-fold mean difference between plate reader and flow cytometry data

A Study on Transportation Carbon Emissions Based on the IPCC Method: a Case Study of Chongqing City

The carbon emissions from transportation have an undeniable impact on global climate change. This article focuses on the central urban area of Chongqing City as the research area and uses IPCC's reference method to calculate the carbon emissions from transportation in Chongqing from 2016 to 2020. The study estimated the carbon emissions from transportation vehicles in terms of fossil fuels and electricity, and analyzed the relationship between the carbon emissions of transportation vehicles powered by fossil fuels and electricity respectively. The study found that the carbon emissions from transportation in Chongqing increased during the study period, with gasoline and diesel vehicles accounting for the majority of emissions. In addition, this article also analyzed the role of promoting electric vehicles and achieving electrified transportation in reducing carbon emissions from transportation vehicles, which was found to be an effective way. Therefore, this article suggests that efforts should be made to promote and develop electric vehicles, while encouraging and promoting the achievement of electrified transportation to achieve the goal of reducing carbon emissions from transportation vehicles