Relational-Convergent Transformer for image captioning

Image captioning describes the visual content of a given image by using natural language sentences, and plays a key role in the fusion and utilization of the image features. However, in the existing image captioning models, the decoder sometimes fails to efficiently capture the relationships between image features because of their lack of sequential dependencies. In this paper, we propose a Relational-Convergent Transformer (RCT) network to obtain complex intramodality representations in image captioning. In RCT, a Relational Fusion Module (RFM) is designed for capturing the local and global information of an image by a recursive fusion. Then, a Relational-Convergent Attention (RCA) is proposed, which is composed of a self-attention and a hierarchical fusion module for aggregating global relational information to extract a more comprehensive intramodal contextual representation. To validate the effectiveness of the proposed model, extensive experiments are conducted on the MSCOCO dataset. The experimental results show that the proposed method outperforms some of the state-of-the-art methods.     

医院虚拟化服务器部署

随着医院信息化的发展,需要有一种更有效率的方式来调配管理服务器资源。虚拟化能使服务器的资源被更有效地利用起来。通过虚拟化的技术,能将不适宜放在同一台服务器中的应用整合于一台物理服务器中。通过虚拟化软件的调配,能将一台服务器的资源利用率最大化。虚拟化服务器还能解决由于硬件、环境不足造成的资源紧张,提高医院信息系统管理的效率。     

Comparison of the effects of Mg–6Zn and titanium on intestinal tract in vivo

To evaluate the ability of Mg–6Zn to replace titanium nails in the reconstruction of the intestinal tract in general surgery, we compared the Mg–6Zn and titanium implants with respect to their effects on rat’s intestinal tract by biochemical, radiological, pathological and immunohistochemical methods. The results indicated that Mg–6Zn implants started to degrade at the third week and disintegrate at the fourth week. No bubbles appeared, which may be associated with intestinal absorption of the Mg–6Zn implants. Pathological analyses (containing liver, kidney and cecum tissues) and biochemical measurements, including serum magnesium, creatinine, blood urea nitrogen, glutamic–pyruvic–transaminase and glutamic–oxaloacetic–transaminase proved that degradation of Mg–6Zn did not harm the important organs, which is an improvement over titanium implants. Immunohistochemical results showed that Mg–6Zn could enhance the expression of transforming growth factor-β₁. Mg–6Zn reduced the expression of tumor necrosis factor at different stages. In general, our study demonstrates that the Mg–6Zn alloy had good biocompatibility in vivo and performed better than titanium at promoting healing and reducing inflammation. It may be a promising candidate for stapler pins in intestinal reconstruction.     

Properties of indium tin oxide films prepared by ion-assisted deposition

Conducting transparent films of indium tin oxide were deposited by 100 eV oxygen-ion-assisted deposition. A refractive index of 2.13 at 550 nm was obtained for films deposited onto ambient temperature substrates. The refractive index decreased with increasing substrate temperature to a value of 2.0 at 400°C. The sheet resistance of films 135 nm thick decreased from 800 Ω/□ for layers deposited onto room temperature substrates to around 25 Ω/□ at 400°C. Structural studies revealed that ion-assisted deposition onto ambient temperature substrates produced amorphous films, and that at temperatures above 100°C the films exhibit In₂O₃ crystallinity. In addition, it was found that the number of voids in the ion-bombarded films was reduced relative to that in films produced by conventional reactive evaporation.     

The effects of chloroform toxicity on methane fermentation

The methanogenic phase of anaerobic digestion is often considered to be the most sensitive step in the overall process. Chloroform, a model industrial toxicant was assayed with methane fermentation, acetate enrichment cultures. Commonly, microbial toxicity response studies have observed the toxicity response over a relatively short time span, on the order of a few hours or days. In addition, cessation of observed cell function has often been assumed to be equated with death of the cells. The purpose of this study was to determine the toxicity response under various conditions over prolonged periods, on the order of months, with major emphasis on the recovery pattern. The following parameters were observed: concentration of toxicant, solids retention time, biomass concentration, toxicant exposure time, cell age, toxicant administration pattern and temperature.The methane fermentation culture was able to acclimate to the presence of chloroform while fermenting acetate to methane. Inhibition of unacclimated cultures was noted at 0.5 mg l⁻¹, but with acclimation 15 mg l⁻¹ could be tolerated. There was a clear correlation between dose and inhibition. Recovery from inhibition was a function of SRT and biomass concentration. Younger cells were more resistant than older cells. The duration of chloroform exposure was directly related to the degree of residual inhibition. Reduced temperature delayed recovery of gas production from slug doses of chloroform. Radio tagged chloroform studies indicated that recovery of methane production occurred due to acclimation of the methanogens to the presence of chloroform and not from the disappearance of chloroform by microbial degradation.     

Si(Li)NaI(Tl) sandwich detector array for measurements of trace radionuclides in soil samples

An ultra-sensitive X/γ-ray detector system for assaying trace radioactivity in actinide contaminated soil and ash samples has been developed. The new system consists of an array of 6 large Si(Li) X-ray detectors sensitive on both faces and mounted on edge in a paddle-shaped cryostat with a 14 cm diameter Be window on each side. The paddle, with a sample of the soil placed at each window, is sandwiched between 2 large NaI(Tl) scintillators which suppress the γ background. With X-rays being measured simultaneously from soil in 2 sample holders and background reduced by 50% using anticoincidence, the sensitivity of this detector is 4 times higher than that of conventionally mounted Si(Li) detectors. A soil sample containing 50 pCi/g ²³⁹Pu was measured in 5 min with an uncertainty of < 20% and a sample containing 7 pCi/g was measured in 1 h. With fwhm resolution of 400 eV at 17 keV, the ULβ₁ and NpL_β1 X-ray peaks are resolved thus permitting measurement of trace Pu in the presence of ²⁴¹Am. This is the most sensitive and selective detector known for nondestructive assay of radioactivity in soil and other samples.     

Mechanics of multiphase fluid flows in variably saturated porous media

This article proposes a set of flow equations governing the simultaneous movement of aqueous and nonaqueous liquids in variably saturated soils. The basic principles and balance laws of continuum mixture theory, along with thermodynamically admissible constitutive laws and simplifying kinematic assumptions, yield a formulation for isochoric multiphase flows through a nondeforming porous matrix. Cast in terms of familiar quantities, the governing equations are similar in form to the classic Richards equation for each liquid phase. The development suggests new rock-fluid properties that must be measured to characterize multiphase flows in the unsaturated zone.     

负载氯喹的骨靶向纳米颗粒打破肿瘤细胞增殖与骨吸收之间的恶性循环

肿瘤细胞增殖与骨吸收之间的恶性循环加剧了骨肿瘤的进展和转移风险.为此,我们设计并制备了聚乙二醇-阿仑膦酸钠修饰的聚多巴胺(PPA)纳米粒子,并在其表面负载自噬抑制剂氯喹(CQ),期望利用该治疗载体(PPA/CQ)打破肿瘤细胞增殖与骨吸收之间的恶性循环,从而有效地治疗骨肿瘤.实验证明,PPA/CQ可以有效地富集到骨组织,...