Evaluation of pipe whip impacts on neighboring piping and walls of the Ignalina Nuclear Power Plant

Stress corrosion cracks have been discovered in Group Distribution Headers (GDH) at the Ignalina and Chernobyl Nuclear Power Plants. This increases the probability that a guillotine pipe break can occur that creates a whipping pipe (GDH) with the potential to damage surrounding structures—i.e. adjacent GDH and its attached piping or adjacent reinforced concrete compartment wall. The GDH is the most important component for reactor safety in case of an accident. Emergency Core Cooling System (ECCS) piping is connected to the GDH piping such that, during an accident, coolant passes from the ECSS into the GDH.Presented in this paper is the transient analysis of a Group Distribution Header following a guillotine break at the blind end of the header. Using a very conservative force loading function, the transient response of a whipping RBMK-1500 GDH along with neighboring concrete walls and pipelines is obtained using finite element methodology.The results of the study, assuming that the impacted GDH does not suffer stress corrosion cracking, indicate that the structural integrity of the compartment should be maintained and failure should not propagate from GDH to GDH.     

提高以草浆为主的低定量涂布纸不透明度的研究

在选择好对不透明度有利的优质功能颜料及其最佳添加量范围的研究基础上,又从性能价格比方面进一步探讨颜料的搭配对不透明度的影响,结果得出了由高岭土、UFGCC和优质功能颜料组成的三元体系优越于由高岭土和优质功能颜料组成的双元体系的结论,其中UFGCC添加量为20份左右,煅烧土20－30份,钛白添加量为7．5份左右。     

帘式涂布及在轻量涂布纸的应用

文章对帘式涂布原理、涂布中产生的物理现象、容易产生的问题和应该解决的方法作了论述,并介绍了帘式涂布方式在轻量涂布纸中的应用。     

Optimal Confidential Mechanisms in Smart City Healthcare

Smart City Healthcare (SHC²) system is applied in monitoring the patient at home while it is also expected to react to their needs in a timely manner. The system also concedes the freedom of a patient. IoT is a part of this system and it helps in providing care to the patients. IoT-based healthcare devices are trustworthy since it almost certainly recognizes the potential intensifications at very early stage and alerts the patients and medical experts to such an extent that they are provided with immediate care. Existing methodologies exhibit few shortcomings in terms of computational complexity, cost and data security. Hence, the current research article examines SHC² security through Light Weight Cipher (LWC) with Optimal S-Box model in PRESENT cipher. This procedure aims at changing the sub bytes in which a single function is connected with several bytes’ information to upgrade the security level through Swam optimization. The key contribution of this research article is the development of a secure healthcare model for smart city using SHC² security via LWC and Optimal S-Box models. The study used a nonlinear layer and single 4-bit S box for round configuration after verifying SHC² information, constrained by Mutual Authentication (MA). The security challenges, in healthcare information systems, emphasize the need for a methodology that immovably concretes the establishments. The methodology should act practically, be an effective healthcare framework that depends on solidarity and adapts to the developing threats. Healthcare service providers integrated the IoT applications and medical services to offer individuals, a seamless technology-supported healthcare service. The proposed SHC² was implemented to demonstrate its security levels in terms of time and access policies. The model was tested under different parameters such as encryption time, decryption time, access time and response time in minimum range. Then, the level of the model and throughput were analyzed by maximum value i.e., 50 Mbps/sec and 95.56% for PRESENT-Authorization cipher to achieve smart city security. The proposed model achieved better results than the existing methodologies.     

LWC在凹版印刷中网点扩大的实验研究

计算机中设置的网点面积从5%到100%的系列色块,通过电子雕刻机在凹版滚筒上雕刻出来,在凹版印刷实验机上使用LWC制得反映不同浓淡油墨配比的实验样张,然后用密度计测量样张上色块的网点百分比,画图分析不同油墨浓淡状态下LWC样张上凹印网点扩大情况.实验结果表明:冲淡剂的增加使得网点扩大程度减少.     

追求卓越加快技术创新步伐泰格林纸集团引进20万吨低定量涂布纸生产线

介绍了泰格林纸集团从国外引进的20万吨/年低定量涂布纸项目生产规模的确定、产品定位、纸机选型以及试生产情况、效率和产量，产品质量等。     

羟乙基醚化淀粉在LWC涂布纸中的应用探讨

通过实验室在相同涂料中加入羟乙基醚化淀粉替代部分丁苯胶乳,探讨对LWc涂布纸的物理性能的影响以及对涂布纸成本进行分析。结果表明：在Lwc涂布纸涂料方案5中,4份羟乙基醚化淀粉可以替代5份丁苯胶乳,表现出较为理想的物理性能。涂料配方中还相应减少了羧甲基纤维素（CMC）的用量,明显降低了LWC涂布纸的生产成本。     

提高LWC纸不透明度的意义与途径

本文讨论提高轻量涂布纸 (LWC)不透明度的意义 ,提出提高LWC纸不透明度的途径     

羧基丁苯胶乳轻涂纸的制备及其法庭鉴定应用

合成了丁苯胶乳轻涂纸,采用傅里叶变换红外光谱法对轻涂纸胶黏剂进行分析。根据所得光谱分析特征峰,并进行了方法学考察,结果表明运用红外光谱的方法对轻涂纸胶黏剂的鉴定,方法不破坏检材本身结构,且重现f生好、操作简便,结果可靠准确,为法庭科学涉及轻涂纸案件的鉴别提供了一种有效、便捷的方法。     

蓝桉APMP制浆造纸技术的研究

主要介绍了蓝桉APMP制浆与配优质印刷纸技术的研究成果及生产应用。从纤维性能和化学组分等方面对蓝桉作为造纸用纤维原料进行了深入的研究，阐述了实验室依据蓝桉特性开发的蓝桉APMP制浆工艺；蓝桉最适于采用两段挤压和两段浸渍工艺生产高质量APMP浆料，并发展和完善了APMP制浆的理论基础。所开发的APMP制浆工艺可依据产品对浆料性能的要求适当调整工艺参数来生产所需的APMP浆料。同时对以蓝桉APMP浆料为主抄造优质印刷纸（如SC纸和LWC原纸等）的工艺也进行了研究，均取得阶段性成果。蓝桉APMP制浆及应用技术的生产试验非常成功，从而证实了研究成果的适用性和科学性，为桉木、金合欢等速生阔叶材资源的合理利用提供的可靠的技术依据。