inclusion

摘要： The dissolution kinetics of Al_(2)O_(3)in CaO-Al_(2)O_(3)SiOslags was studied using a high-temperature confocal scanning laser microscope at 1773 to 1873 K.The results show that the controlling step during the Al_(2)O_(3)dissolution was the diffusionin molten slag.It was found that the dissolution curves of Al_(2)O_(3)particles were hardly agreed with the traditional boundary layer diffusion model with the increase of the CaO/Al_(2)O_(3)ratio of slag.A modified diffusion equation considering slag viscosity was developed to study the dissolution mechanism of Al_(2)O_(3)in slag.Diffusion coefficients of Al_(2)O_(3)in slag were calculated as 2.8×10to 4.1×10m~2/s at the temperature of 1773-1873 K.The dissolution rate of Al_(2)O_(3)increased with higher temperature,CaO/Al_(2)O_(3),and particle size.A new model was shown to be v_(Al_(2)O_(3))=0.16×r_(0)^(1.58)×x^(3.52)×(T-T_(mp))^(1.11)to predict the dissolution rate and the total dissolution time of Al_(2)O_(3)inclusions with various sizes,where vAl_(2)O_(3) is the dissolution rate of Al_(2)O_(3)in volume,μm^(3)/s;x is the value of CaO/Al_(2)O_(3)mass ratio;R_(0)is the initial radius of Al_(2)O_(3),μm;T is the temperature,K;T_(mp)is the melting point of slag,K.

摘要： As China’s urbanization enters a transitional period,diversified supply of public service facilities and the improvement of public service facilities from the level of social equity are important themes of urban planning.The core policies and concepts of the planning of public service facilities in Greater London under the framework of the statutory urban planning system were analyzed,and the characteristics were summarized to seek possible references.Greater London takes development planning as the core,and integrates the planning of public service facilities into economic growth,overall spatial development,community construction,and the improvement of residents’ welfare from the regional to the local level under the guidance of the national policy planning framework.Among them,providing diversified infrastructure and services,focusing on diverse population needs and equal choices of different social groups,ensuring the accessibility of facilities and services,and emphasizing barrier-free design are worthy of reference for urban planning in China.

摘要： To further improve the metallurgical quality of electroslag remelting,remove the large inclusions in electroslag ingot and refine the solidification structure of electroslag ingot,an electroslag remelting furnace with electromagnetic stirring was designed,and the influence of different magnetic induction intensities on metallurgical quality of GCr15 electroslag ingot was studied.Inclusions with different sizes and types were analyzed by an ASPEX scanning electron microscope,and the morphology and composition of inclusions were further observed by a JSM-6510LV scanning electron microscope.The distribution of alloying elements on the cross section of electroslag ingot was analyzed by original position analysis(OPA).The results show that whether or not electromagnetic stirring is used,the inclusions in electroslag ingot are mainly composed of Al_(2)O_(3),MnS,MnS-oxide and other oxides,among which Al_(2)O_(3) is the most.Compared with an electroslag ingot without electromagnetic stirring,the number of inclusions decreases considerably,and the proportion of small inclusions increases while the proportion of large inclusions decreases when the electromagnetic stirring with remelting current of 1.1 kA and magnetic induction intensity of 62 Gs is applied.However,excessive electromagnetic force will cause the number and diameter of inclusions to increase again.Electromagnetic stirring has different effects on the segregation of different elements.Under the experimental conditions,the weak electromagnetic force with 1.1 kA and magnetic induction intensity of 108 Gs has little effect on the segregation of C,but decreases the segregation of P,and the excessive electromagnetic force aggravates the segregation of alloy elements.

摘要： In this essay we propose notions of difference and equality as elements of a phenomenologically informed ethics.The proposed notions are tested on a diagnosis of inclusion,and,in particular,inclusive education,both of which are leading values in contemporary public moral discourse and in the formulation of related policies.The value of inclusive practices is commonly seen in the circumstance that they safeguard difference while granting equality and realize equality without curtailing difference,thus creating conditions in which human dignity is respected.We ask in what sense,that is,according to what understanding of equality and difference,this is true.Our conclusion is that“the value of inclusion”is at least compatible with a merely formal sense of equality,which,at the same time,effectively negates human difference.On the other hand,the proposed phenomenological notions of difference and equality seem to provide an avenue towards a renewed understanding of the humanity of man,as well as of(inclusive)education as a manner of fostering that humanity.The interpretive framework for our analysis is given by Heidegger’s diagnosis of nihilism.The latter implies a notion of“values”as conditions of a dynamic of empowerment which has the“drive to more”as its intrinsic,constitutive motive.

摘要： Designing and completing clinical intervention trials can be challenging. Many aspects must be considered to ensure that patients who fulfill the inclusion criteria for the intervention are identified and recruited effectively. The aim of this paper was to disseminate the results of a cancelled trial and present unpredictable barriers met underway, so future researchers can learn from these. The trial examined perioperative analgesic and anxiolytic effects of melatonin. It was registered at https://clinicaltrials.gov/ (NCT02386319) and a study protocol was published a priori. Participants were recruited from the plastic surgery ward of a Danish private hospital. The intended sample size of the trial was 72 patients based on power calculations of the outcome measures. During the six-month recruitment period, six patients were included, with only three completing the trial. Unpredictable barriers were poor communication between investigators and facility staff, lack of access to booking and operation schedules at the recruitment facility, the patient group being unwilling to participate, and the timing of recruitment conversations being unsuited as patients often did not have time to talk to the investigators. Too few data were collected to make any meaningful statistical analyses. Our trial was cancelled prematurely because of unpredictable barriers after commencing recruitment. Considering these barriers when designing a clinical trial may help future researchers avoid cancelling trials. Transparency of research is important and even prematurely cancelled trials should publish their findings.

摘要： Submerged arc welding(SAW) and gas metal arc welding(GMAW) experiments of Nb-bearing X80 steel were conducted with high-toughness wires.The inclusions in weld metals were analyzed in terms of their types and sizes.In GMAW,the inclusions are primarily Ti, Ca, Si, Al, and Mg compounds with no Nb and are generally less than 0.8 μm in size, whereas, in SAW weld, the inclusions are larger, mostly approximately 2-5 μm in size, and are cored with Ca and Ti, exhibiting obvious oxidation metallurgical features.The SAW joint was hot-deformed, and Nb-bearing nano precipitates were newly found in the weld metal through transmission electron microscopy, and Nb-free core-shell inclusion was found through scanning electron microscopy.The inclusions and precipitates were dispersed in or on the boundaries of acicular ferrite, contributing to acicular ferrite nucleation and grain refinement.

摘要： The corrosion behavior of 95 ksi grade super 13Cr stainless steel in an environment consisting of H_(2)S and CO_(2)was investigated.The results reveal that for both loading methods(constant load and four-point bending),local corrosion occurred on the surface of the samples tested at ambient temperature but was absent from the samples tested at high temperatures.The local corrosion was caused by the formation of pits at nonmetal inclusions;the pits were formed under the action of stress in an acidic environment,which was due to an acid solution.Subsequently,the corrosion extended along the direction of stress.The sensitivity of stress corrosion cracking increased because of the local corrosion.

摘要： The culture of inclusion needs to be continuously promoted,supported,strengthened and tested to remove the barriers and deficiencies still present in the built environment around us.Do the play areas in parks,gardens and squares offer real opportunities for persons with different abilities to play and have fun?Do they promote the principle of integration and create opportunities for inclusion?To answer these questions,an audit tool has been developed to assess the inclusivity of outdoor play areas in the central and suburban areas of our cities.The key elements of the evaluation focus on the physical environment of the playground and are grouped in three thematic areas:physical and sense-perception accessibility;accessibility to the experience and participation and socialisation.Although children’s right to play is now recognised and there is much talk of inclusion,application of the tool to an Italian city has shown that the right to play is not fully and satisfactorily applied.Inclusive playgrounds are still not frequent enough and a new approach to their design is needed.

摘要： We re-evaluate the Raman spectroscopic quantification of the molar ratio and pressure for CH4–CO2 mixtures.Firstly,the Raman quantification factors of CH4 and CO2 increase with rising pressure at room temperature,indicating that Raman quantification of CH4/CO2 molar ratio can be applied to those fluid inclusions(FIs)with high internal pressure(i.e.,>15 MPa).Secondly,the v1(CH4)peak position shifts to lower wavenumber with increasing pressure at constant temperature,confirming that the v1(CH4)peak position can be used to calculate the fluid pressure.However,this method should be carefully calibrated before applying to FI analyses because large discrepancies exist among the reported v1(CH4)-P curves,especially in the highpressure range.These calibrations are applied to CH4-rich FIs in quartz veins of the Silurian Longmaxi black shales in southern Sichuan Basin.The vapor phases of these FIs are mainly composed of CH4 and minor CO2,with CO2 molar fractions from4.4%to 7.4%.The pressure of single-phase gas FI ranges from 103.65 to 128.35 MPa at room temperature,which is higher than previously reported.Thermodynamic calculations supported the presence of extremely high-pressure CH4-saturated fluid(218.03–256.82 MPa at 200°C),which may be responsible for the expulsion of CH4 to adjacent reservoirs.

摘要： Al_2O_3 and TiN inclusions in interstitial-free(IF) steel deteriorate the properties of the steel. To decrease the defects of cold-rolled sheet, it is important to clearly distinguish between the degrees of damage caused by these two inclusions on the surface quality of the steel. In this study, a nanoindenter was used to test the mechanical properties of the inclusions, and the distribution and size of the inclusions were obtained by scanning electron microscopy(SEM). It was found that when only mechanical properties are considered, TiN inclusions are more likely to cause defects than Al_2O_3 inclusions of the same size during the rolling process. However, Al_2O_3 inclusions are generally more inclined to cause defects in the rolling process than TiN inclusions because of their distribution characteristic in the thickness direction. The precipitation of Al_2O_3 and TiN was obtained through thermodynamical calculations. The growth laws of inclusions at different cooling rates were calculated by solidification and segregation models. The results show that the precipitation regularity is closely related to the distribution law of the inclusions in IF slabs along the thickness direction.

摘要： This paper discusses some problems existing in previous researches on inclusion particlesin steel by two conventional methods. On the basis of the discussion, a new research method,more accurate and efficient, is proposed to alleviate those problems.

摘要： 本发明公开了一种膨胀岩边坡挡墙Inclusion结构及其布设方法，通过此挡墙系统的设置，可以有效增强膨胀岩边坡的柔性支挡和排水效果。此挡墙Inclusion系统包括挡墙、可压缩性及可渗透性土工合成材料和墙趾、踵排水系统。可压缩性土工合成材料的作用主要有两个方面：一是允许挡墙后的膨胀岩边坡在侧向膨胀力的作用下有一定的可控位移，使墙后土压力转换为主动土压力，以达到水平减载的目的；二是允许径向渗流和沿坡向渗流，并由墙趾排水系统导出，可避免降水滞留以维持边坡的稳定性。本发明系统设置施工简易明了、方便，效果突出。