基于安全即服务的网络安全智慧中台技术研究

在新兴互联网时代的推动下,云、大、物、移、智等相关技术在信息变革中起到关键作用。随着中台建设热浪翻涌、云计算落地疯狂扩张、安全自动化运维兴起及5G新技术试点应用,各类业务发展无不要求安全ISP能够快速应对多应用、多场景、多用户下的安全建设需求。单项或者多项安全能力的简单叠加已逐步被数字化市场所摈弃,安全逐步演变为一种可协同联动、相互供给、弹性伸缩、自由组合的数字化生态模式。在新技术、新应用、新需求驱动下,安全如何实现立体空间数字化建设,满足按需增长的动态安全需求,已成为当下研究的热点。     

不同工质条件下污水源冷热水机组的性能分析

介绍污水源冷热水机组的工作原理及污水的特性,推导出了污水源冷热水机组在制冷和热泵工况下的各个设备的（火用）损失、整个机组的（火用）效率以及一次能源利用率的计算公式。分析比较不同工质条件下机组在夏季制冷和冬季制热工况时,整个机组的（火用）效率、机组COP值、一次能源利用率等,得出R407C是污水源热泵理想工质的结论。     

外白渡桥船移大修保护工程设计（上）

外白渡桥是座百年老桥,具有历史文化、人文景观和交通工程三重功能。结合外滩地区交通综合改造工程的建设,对桥梁实施“船移大修”保护。本着“修旧如旧“的原则,将上部钢桁架移运至船厂检测大修,并将下部墩台原位凿除重建,取得了良好效果。工程设计充分体现了科学技术和人文艺术的完美结合。     

用干簧管传感的斜井自动防跑车装置

煤矿井下目前主运输斜井多采用串车提升,尽管不少煤矿在提升斜井的上部车场安装了自动防跑车装置,但斜井防跑车门的功能尚不完善,特别是斜井开车时防跑车门一般都处于常开状况,即斜井在开车或者矿车停在斜井中时,防跑车门处于打开位置,当上车场人员操作失误造成上车场的矿车或设备设施溜入斜井时,防跑车门不能起到保护作用,将会酿成提升事故的发生,是一大安全隐患.本装置采用干簧管作为防跑车装置控制系统的传感器元件,合理解决了上述弊端,且系统动作灵敏、安全可靠,具有应用推广的价值.     

The methodical organization of talking and eating: Assessments in dinner conversations

The paper analyzes food talk and more particularly food assessments produced during dinner conversations videorecorded in naturalistic settings. This focus reveals how expressions of food preferences, taste, and other evaluations are deeply embedded within collective activities, related both to the ongoing conversation and to the management of the meal as a social event. The paper reviews existing interactional studies of dinner conversations, and provides a detailed analysis of the interactional, linguistic and multimodal patterns which characterize the sequential environment in which assessments are produced. It identifies three recurrent contexts: at the beginning of meals, at closings of sequences and topical developments, and at ‘delicate’ moments characterized by emerging disagreements and conflicts. This sequential analysis reveals how taste and food preferences are highly sensitive both to the social occasions and to the organization of turns at talk; analysis shows that not only are assessments systematically positioned within specific sequences in dinner conversations, but also that they can be mobilized in service of other social practices, such as fueling topical talk, reorienting participants’ focus of attention or stopping emerging sequential trajectories.     

Loss of Curing Agent During Thin Film (Droplet) Curing of Thermoset Material

Recently, it has been reported by our group and others^1.2 that loss of curing agent is encountered during the curing of small droplets or thin films of amine cured epoxies. In our earlier study³ results were reported on loss of curing agent in small droplets used in conducting the rnicrobond, single fiber test for determination of interfacial shear strength (ISS). It was reported that use of a volatile curing agent (meta-phenylene diamine (m-PDA) with DGEBA resin) resulted in increasing amounts of curing agent being lost (as measured by T₈ of the cured droplets) with decreasing droplet size during the processing procedure. Droplets smaller than 150 micrometers were seen to lose up to 40% of the curing agent leading to alteration of the mechanical properties of the droplet and, therefore, causing measured values of ISS to be exceedingly low. Use of a less volatile curing agent (Jeffamine 700, a polyether diamine, Texaco Specialty Chemicals) in combination with DGEBA resin produced results which indicated that loss of curing agent was not occuring. This study was undertaken to show the relationships between film (or droplet) size and the amount of curing agent lost (during the processing) for three different aminecured epoxy systems.     

IR spectroscopic study of Pt/Kl zeolites using adsorption of CO as a molecular probe

FTIR spectra of CO adsorbed on Pt/KL catalysts show that the relative band intensities and the total dispersion markedly depend on the catalyst preparation method (ion exchange, incipient wetness impregnation or co-impregnation with KCl). The CO stretching frequency of the dominant band for linear CO is shifted to higher wavenumbers, parallel with the proton concentration in the reduced catalyst, which is derived independently from the intensity of the IR bands of the OH groups. The results are in accordance with the model that electron-deficient platinum particles are platinum-proton adducts.On leave from: N.D. Zelinsky Institute of Organic Chemistry, Academy of Sciences, Moscow, USSR.     

Inhibitory effect of boldine on fish oil oxidation

The antioxidative effect of boldine, an alkaloid extracted fromPeumus boldus Mol. (boldo), was assayed on the spontaneous and on the metal-induced oxidation of fish oil. The inhibitory effect of boldine was compared to those of dl-α tocopherol, the flavonoid quercetin and the synthetic antioxidants butylated hydroxytoluene and butylated hydroxyanisole. Boldine, in all assays, showed a good antioxidative effect, which was comparable to that of quercetin and even better than that of dl-α tocopherol and the synthetic antioxidants. Additive effects were observed when mixtures of boldine and quercetin or dl-α tocopherol were assayed. The present study supports the potential use of boldine as a novel natural antioxidant for fish oil.     

两江电站混凝土面板施工设备的研制及工艺

混凝土面板施工设备的研制及工艺是保证施工质量的重要环节，本文重点阐述了无轨滑模、侧模及溜槽的研制及工艺，它是在总结各地施工经验基础上提出的，对以后设计制造提供了有益借鉴。     

Flavonoids as stabilizers of fish oil: An alternative to synthetic antioxidants

The antioxidant activities against fish oil oxidation of six commercially available flavonoids and of five flavonoids purified from two Chilean native plants were compared to those ofdl-α-tocopherol and of two synthetic antioxidants, butylated hydroxytoluene and butylated hydroxyanisole. Among the commercial flavonoids, catechin, morin and quercetin showed a higher activity when fish oil oxidation (either spontaneous or Fe²⁺-induced) was assessed from the formation of peroxides or thiobarbituric acid-reactive substances. Among the native flavonoids, the 5,3′,4′-trihydroxy-7-methoxy flavanone (designated as Pt-2) showed the highest antioxidant activity. Mixtures of quercetin or of Pt-2 withdl-α-tocopherol produced better inhibitory effects when compared to that of each substance assayed by itself. Also, when Pt-2 and quercetin were assayed in combination (0.3 g/kg oil and 0.7 g/kg oil, respectively), a synergistic antioxidant effect was observed. Results indicate that several flavonoids could be used as natural antioxidants as a means to replace those synthetic antioxidants, the use of which has been questioned.