The Application of Cold Banding Technology for Dust Removed From BOF Gas Using Dry Dedusting Technology

Firstly, physical and chemical properties of dust removed from BOF gas are analyzed, and then the cold banding technology of dust removed from BOF gas and its application are introduced. Tests have proved that using cooled agglomerated pellets made of the dust removed from BOF gas and small amounts of modified starch as a coolant and slagging agent in steel production can bring about considerable economic, social and environmental benefits.

Model for Quantitative Evaluation and Prediction of the Concentration of Phosphorus Removed during Pyro-Hydro Beneficiation of Haematite

This paper presents a model derived for quantitative evaluation and prediction of the concentration of phosphorus removed during pyro-hydro beneficiation of iron oxide ore. Potassium hydroxide was used as the leaching solution and the reaction vessel containing the solution and ore was heated at a temperature of 600℃ for 10 minutes. The results of the investigation indicates that the model;P = (e0.7827) S predicts the concentration of phosphorus removed, based on the concentration of sulphur simultaneously removed. It was observed that the validity of the model is rooted in the expression lnP = lnN + lnS where both sides of the expression are approximately equal to 4. The maximum deviation of the model-predicted concentration of removed phosphorus from the corresponding concentration obtained from the experiment was less than 3%. The concentrations of phosphorus removed per unit mass-input of iron oxide ore as obtained from experiment and derived model are 0.8917 and 1.0354 mg/kg g-1 respectively. Similarly, the concentrations of phosphorus removed per unit concentration of removed sulphur as obtained from experiment and derived model are 1.8838 and 2.1874 mg/kg (mg/kg)-1 respectively. This implies that the concentration of phosphorus removed is approximately equal to the concentration of simultaneously removed sulphur during the beneficiation process.

Can E-Shoppers Return Items Removed From Packaging?

One year has passed since the revised Law on the Protection of the Rights and Interests of Consumers came into effect on March 15, 2014, the World Consumer Rights Day. Following the changes, consumers can return goods they are dissatisfied with and get an unconditional refund within seven days of purchase. This applies to not only Internet shopping but also TV- and telephone-based sales.

Effects of structural and operating parameters of ECP fan on dust particles removed in the transition flow regime

An enclosed cyclone passageway(ECP)dust-collecting fan is discussed.The ECP fan separates dust by centrifugal force originating from a driven spiral airflow,and its design takes the constraints of Chinese underground coal mines into consideration.Using the force equilibrium law,a general equation for dust removal in the centrifugal dust removal section(CDRS)of the ECP fan is deduced.This general equation is simplified using the CDRS structure and the fan operating parameters and is analysed numerically.The attractive results show that increases in the airflow rate of the fan,the structural ratio of the ECPs and the radius of the extended axis can improve the dust removal performance of the CDRS.Furthermore,the effects of the structural ratio and the radius on dust removal dominate over that of the flow rate,and the effect of the structural ratio is more significant than that of the radius.

Estimate of Heavy Metals in Soil with Non-Soil Removed

Quantifying and mapping heavy metals’ concentrations in the soil are important in monitoring and managing heavy metal pollution in the mining areas. However, the cover on the soil acts as a balk when retrieving information from soil. In order to retrieve heavy metal pollution precisely and quickly from hyperspectral images, this study presents a new method to remove non-soil information based NDVI from hyper-spectral and multi-spectral images. The method assumed that the mixed objects in each pixel of remote sensing images are composed only of soil and vegetation-based non-soil end-generational endmembers, then, the soil information of each pixel can be compensated with the non-soil information removed based on its NDVI. Thus, the soil DN value can be corrected to retrieve soil information more precisely. The method has been used on the Hyperion image in June 8, 2002 and the Gaofen-2 (GF-2) image in February 14, 2016 to retrieve the heavy metals’ contents in Bai-ma and De-sheng mining areas, Miyi County, Sichuan Province. From the non-soil information removed images, the R2 and RMSE of the models of estimating Cr, Ag, Cu and Ba in soil are 0.68, 0.724, 0.71, 0.695 and 75.96, 0.03, 52.88, 284.70 respectively. From the original images, the R2 and RMSE of the models of estimating Cr, Ag, Cu and Ba in soil are 0.67, 0.385, 0.425, 0.406 and 80.11, 0.18, 53.43, 396.49 respectively. The retrieval results show that the non-soil information removed images are superior to original images in soil heavy metals’ contents retrieval. This indicates that this method is feasible, and it can be used in soil information retrieval.

Which Lymph Nodes Should Be Exactly Removed during Breast Cancer Surgery to Prevent Metastasis?

The aim of the study was to identify the relationship between molecular subtypes of breast cancer (BC) and the morphological characteristics of axillary lymph nodes (ALN) and metastatic risk in BC patients to clarify danger degree and justification of removal before metastases appear. Material and methods. Tumor molecular subtypes of 116 female BC patients aged 24 - 75 (53.9 ± 0.8) were determined by tumor tissue immunohistological examination (obtained by tru-cut biopsy), and the BC was classified as Luminal A, Luminal B/HER2−, Luminal B/HER2+, TNBC, and HER2+ subtypes. To interpret the results for the BC receptor status, immunohistochemical analysis was performed and interpreted according to the Allred scale. Lymph node size, shape, structure and conglomerates availability were recorded according to ultrasonography (USG) examination evaluated on “LOGIQ C5-Premium” (2012). Blood CA-15-3 levels were analyzed using a COBAS-e 411 automated analyzer. Statistical analysis of the obtained results was carried out using the SPSS-26 software package, and based on the t-Student-Bonferroni and H-Kruskal-Wallis criteria. The sensitivity and specificity of the indicators studied were determined using ROC statistical analysis. Results showed a significant association of some subtypes, as well as receptor expression, with tumor metastasis to ALN. Conclusion: 1) The HER2+ subtype is the most aggressive in terms of ALN metastasis. Although TNBC is the most aggressive subtype in general, it is characterized by fewer metastases to the ALN than the HER2+ subtype. 2) Metastatic ALNs can be distinguished based on their cortical structure before tumor tissue biopsy, which is economically profitable. These LNs can be removed without biopsy.

Fragmentation for selection: how the deleterious mt DNA is removed in the female germline

Mitochondria are the energy factories and metabolic centers of cells,and their malfunction can lead to multiple human diseases.As highly dynamic organelles,mitochondria undergo frequent fission and fusion processes[1].The fusion process enables the exchange of inner materials between individual mitochondrion.The materials from healthy mitochondria could potentially compensate for the defects found in the defective mitochondria.Fission processes not only increase the mitochondrial number but also separate the damaged parts of mitochondria from the healthy ones,thus,facilitating the elimination of the defective mitochondria through a process known as mitophagy.Excessive fusion leads to extra connections and branching of the mitochondria,whereas extra fission results in fragmentation of mitochondria.The fusion and fission processes are differently tuned in various tissues to adapt to different physiological requirements[2].

REMOVED: Steady and unsteady flow simulation with SRH-2D

Farhad Sakhaee.School of Engineering,Parks College of Engineering,Aviation and Technology,Saint Louis University,USA.This article has been removed at the request of the author because the article contains confidential information that is not allowed to be released publicly.The author apologises for any inconvenience this may cause.

Words to Deeds--More restrictions on foreign investment removed amid new opening-up push

As the COVID-19 pandemic rants and raves on,China has maintained its openingup efforts throughout 2021 and now into 2022.On New Year’s Day,the shortened negative lists for foreign investment became effective.The areas off-limits to foreign investors are cut from 30 to 27 in the pilot free trade zones(FTZs).In non-FTZ areas,the reduction goes from 33 to 31.

The Limit on Investment in China Removed

After the 97 Asian financial crisis,China has been conducting positive financial policies in a bid to foster all kinds of investors,and has staged a series of reforms on removing the limit of investment with remarkable success achieved. There will be 5 positive factors in the development of investment this year in China. 1 China will further give play to the functions of financial and monetary policies and a total of RMB 150 billons (about USI) 18.

Corrigendum to“Towards a business model for second-life batteries:Barriers,opportunities,uncertainties,and technologies”[J.Energy Chem.78(2023)507–525]

In the Acknowledgments Section,please replace“Shell oil”for“TotalEnergies”.The authors would like to apologise for any inconvenience caused.For the sake of clarity(“Shell oil”should be removed and in boldblack“TotalEnergies”inserted),this section should say:The authors would like to thank Moura Batteries for the financial support.

China's New Proposal of Returning Lost Cultural Objects Earns International Support Milestone in New Era

China launched a recommendation for the protection and return of cultural objects removed from colonial contexts or acquired by other unjustifiable or unethical means,winning a big applause from many countries which are seeking for more cooperation in solving this serious problem.

Correction:Impact of Transition Metal Layer Vacancy on the Structure and Performance of P2 Type Layered Sodium Cathode Material

Following publication of the original article[1],the authors reported that the author Hun-Gi Jung should be affiliated as 3,4 and 5 instead of 4 and 5.The author’s name“A.-Yeon Kim”needed to be updated to“A-Yeon Kim”,removing the period.The correct author’s name and affiliation have been provided in this Correction.The original article[1]has been corrected.

Background removal from global auroral images:Data-driven dayglow modeling

Global images of auroras obtained by cameras on spacecraft are a key tool for studying the near-Earth environment.However,the cameras are sensitive not only to auroral emissions produced by precipitating particles,but also to dayglow emissions produced by photoelectrons induced by sunlight.Nightglow emissions and scattered sunlight can contribute to the background signal.To fully utilize such images in space science,background contamination must be removed to isolate the auroral signal.Here we outline a data-driven approach to modeling the background intensity in multiple images by formulating linear inverse problems based on B-splines and spherical harmonics.The approach is robust,flexible,and iteratively deselects outliers,such as auroral emissions.The final model is smooth across the terminator and accounts for slow temporal variations and large-scale asymmetries in the dayglow.We demonstrate the model by using the three far ultraviolet cameras on the Imager for Magnetopause-to-Aurora Global Exploration(IMAGE)mission.The method can be applied to historical missions and is relevant for upcoming missions,such as the Solar wind Magnetosphere Ionosphere Link Explorer(SMILE)mission.

Long-term outcomes after endoscopic removal of malignant colorectal polyps:Results from a 10-year cohort

BACKGROUND Choosing an optimal post-polypectomy management strategy of malignant colorectal polyps is challenging,and evidence regarding a surveillance-only strategy is limited.AIM To evaluate long-term outcomes after endoscopic removal of malignant colorectal polyps.METHODS A single-center retrospective cohort study was conducted to evaluate outcomes after endoscopic removal of malignant colorectal polyps between 2010 and 2020.Residual disease rate and nodal metastases after secondary surgery and local and distant recurrence rate for those with at least 1 year of follow-up were invest-igated.Event rates for categorical variables and means for continuous variables with 95%confidence intervals were calculated,and Fisher’s exact test and Mann-Whitney test were performed.Potential risk factors of adverse outcomes were RESULTS In total,135 lesions(mean size:22.1 mm;location:42%rectal)from 129 patients(mean age:67.7 years;56%male)were enrolled.The proportion of pedunculated and non-pedunculated lesions was similar,with en bloc resection in 82%and 47%of lesions,respectively.Tumor differentiation,distance from resection margins,depth of submucosal invasion,lymphovascular invasion,and budding were reported at 89.6%,45.2%,58.5%,31.9%,and 25.2%,respectively.Residual tumor was found in 10 patients,and nodal metastasis was found in 4 of 41 patients who underwent secondary surgical resection.Univariate analysis identified piecemeal resection as a risk factor for residual malignancy(odds ratio:1.74;P=0.042).At least 1 year of follow-up was available for 117 lesions from 111 patients(mean follow-up period:5.59 years).Overall,54%,30%,30%,11%,and 16%of patients presented at the 1-year,3-year,5-year,7-year,and 9-10-year surveillance examinations.Adverse outcomes occurred in 9.0%(local recurrence and dissemination in 4 patients and 9 patients,respectively),with no difference between patients undergoing secondary surgery and surveillance only.CONCLUSION Reporting of histological features and adherence to surveillance colonoscopy needs improvement.Long-term adverse outcome rates might be higher than previously reported,irrespective of whether secondary surgery was performed.

Damage evolution and removal behaviors of GaN crystals involved in double-grits grinding

Elucidating the complex interactions between the work material and abrasives during grinding of gallium nitride(GaN)single crystals is an active and challenging research area.In this study,molecular dynamics simulations were performed on double-grits interacted grinding of GaN crystals;and the grinding force,coefficient of friction,stress distribution,plastic damage behaviors,and abrasive damage were systematically investigated.The results demonstrated that the interacted distance in both radial and transverse directions achieved better grinding quality than that in only one direction.The grinding force,grinding induced stress,subsurface damage depth,and abrasive wear increase as the transverse interacted distance increases.However,there was no clear correlation between the interaction distance and the number of atoms in the phase transition and dislocation length.Appropriate interacted distances between abrasives can decrease grinding force,coefficient of friction,grinding induced stress,subsurface damage depth,and abrasive wear during the grinding process.The results of grinding tests combined with cross-sectional transmission electron micrographs validated the simulated damage results,i.e.amorphous atoms,high-pressure phase transition,dislocations,stacking faults,and lattice distortions.The results of this study will deepen our understanding of damage accumulation and material removal resulting from coupling between abrasives during grinding and can be used to develop a feasible approach to the wheel design of ordered abrasives.

Defective Nickel-Iron Layered Double Hydroxide for Enhanced Photocatalytic NO Oxidation with Significant Alleviation of NO2 Production

Photocatalysis offers a sustainable means for the oxidative removal of low concentrations of NOx(NO,NO2,N2O,N2O5,etc.)from the atmosphere.Layered double hydroxides(LDHs)are promising candidate photocatalysts owing to their unique layered and tunable chemical structures and abundant surface hydroxide(OH)moieties,which are hydroxyl radical(OH)precursors.However,the practical applications of LDHs are limited by their poor charge-separation ability and insufficient active sites.Herein,we developed a facile N_(2)H_(4)-driven etching approach to introduce dual Ni^(2+)and OHvacancies(Niv and OHv,respectively)into NiFe-LDH nanosheets(hereafter referred to as NiFe-LDH-et)to facilitate improved charge-carrier separation and active Lewis acidic site(Fe^(3+)and Ni^(2+)exposed at OHv)formation.In contrast to inert pristine LDH,NiFe-LDH-et actively removed NO under visible-light illumination.Specifically,Ni_(76)Fe_(24)-LDH-et etched with 1.50 mmol·L^(-1)N_(2)H_(4)solution removed 32.8%of the NO in continuously flowing air(NO feed concentration:500 parts per billion(ppb))under visible-light illumination,thereby outperforming most reported catalysts.Experimental and theoretical data revealed that the dual vacancies promoted the production of reactive oxygen species(O_(2)·^(-)andOH)and the adsorption of NO on the LDH.In situ spectroscopy demonstrated that NO was preferentially adsorbed at Lewis acidic sites,particularly exposed Fe^(3+)sites,converted into NO+,and subsequently oxidized to NO3without the notable formation of the more toxic intermediate NO2,thereby alleviating risks associated with its production and emission.