chain

摘要： 1.The object-to-human transmission route of SARS-CoV-2 At the time of writing,coronavirus disease 2019(COVID-19),which is caused by the severe acute respiratory syndrome coron-avirus 2(SARS-CoV-2),has been a global pandemic for more than a year.As of 22 September 2021,the global cumulative incidence exceeds 229 million cases,and the number of deaths has exceeded 4.75 million[1].The current situation of epidemic prevention and control within the countries around the world can be roughly divided into two stages:the pandemic stage that the United States,the United Kingdom,and India are still experiencing(as of 23 September 2021,newly reported cases in the last 24 h in the United States,United Kingdom,and India are 202840,31095,and 26964,respectively[1]);and the normalized epidemic pre-vention and control stage that countries such as China and New Zealand are currently in.

摘要： “In July,I was honored to become a health expert for a Chinese enterprise soft power think tank,which goes to show that our efforts over the past few years have been fully recognized.At the same time,I also deeply feel a strong sense of responsibility and commitment,and look forward to promoting China’s best products to the world!”Alice Fan is the founder and chairperson of Nur Group Holding Co.,Ltd.and CEO of subsidiary company Nur Group Medical International(Shenzhen)Co.Ltd.In less than 5 years,the company has become the pioneering force in the medical technology under her leadership,and has been nominated the most trusted medical supplier in Hong Kong and one of the top 100 brands in China for two consecutive years.It has also been included on the white name list compiled by the Ministry of Commerce of China.Recently,granted China’s Foreign Trade an exclusive interview to share her entrepreneurial experience.

摘要： With the establishment of a well-off society in an all-round way,Chinese residents have put forward higher requirements for the quality and safety of fresh agricultural products.In recent years,domestic and foreign academic circles have also paid more and more attention to the risk of fresh agricultural product supply chain.This article collects and sorts out the research findings of domestic and foreign scholars on the risk assessment of fresh agricultural product supply chain in recent years,and summarizes and discusses from three aspects:supply chain risk factors,risk assessment indicator selection,and risk assessment methods.It is intended to provide a reference for future new research ideas and research perspectives.

摘要： The article“Anthropomorphism Indexes of the Kinematic Chain for Artificial Hands”,written by Immaculada Llop-Harillo,Antonio Perez-Gonzalez,Javier Andres-Esperanza,was originally published electronically on the publisher's internet portal(currently SpringerLink)on May 23th 2020 without open access.With the author(s)' decision to opt for Open Choice the copyright of the article changed in October 2020 to©The Author(s)2020 and the article is forthwith distributed under the terms of the Creative Commons Attribution 4.0 International License(http://creativecommons.Org/licenses/by/4.0/),which permits use,duplication,adaptation,distribution and reproduction in any medium or format,as long as you give appropriate credit to the original author(s)and the source,provide a link to the Creative Commons license and indicate if changes were made.

摘要： With increasing complexity of today’s electromagnetic problems, the need and opportunity to reduce domain sizes, memory requirement, computational time and possibility of errors abound for symmetric domains. With several competing computational methods in recent times, methods with little or no iterations are generally preferred as they tend to consume less computer memory resources and time. This paper presents the application of simple and efficient Markov Chain Monte Carlo (MCMC) method to the Laplace’s equation in axisymmetric homogeneous domains. Two cases of axisymmetric homogeneous problems are considered. Simulation results for analytical, finite difference and MCMC solutions are reported. The results obtained from the MCMC method agree with analytical and finite difference solutions. However, the MCMC method has the advantage that its implementation is simple and fast.

摘要： Background: It is not known whether plasma amino acids levels are different between young and old men in Japan. No research has been reported about changes in plasma levels of amino acids after the administration of glucose or sucrose to young and aged men. Objective: We want to know whether there are age differences in plasma levels of amino acids and if the administration of glucose or sucrose influences their levels. Results: Old people had lower plasma levels of most of amino acids, especially essential and branched-chain amino acids than young men. Plasma levels of amino acids were measured after the administration of 50 grams of glucose or sucrose to young (18 - 22 years old) and aged (≥50 years old) male adults. Plasma levels of total amino acids decreased after the administration of glucose. Decrease in the total amino acid levels was significant in aged men after the administration of sucrose. A significant decrease in plasma levels of total non-essential amino acids was observed at 120 min after the administration of glucose but not sucrose in both aged and young men. Both glucose and sucrose administrations resulted in a significant decrease in the plasma levels of the total essential amino acid levels and branched amino acids in young and aged men. Conclusion: These results suggest that there are age differences in plasma levels of amino acids. Upon the administration of glucose or sucrose amino acids, particularly essential amino acids, decreased in plasma. These amino acids may be transported from the blood soon after the administration of sugar (glucose or sucrose) to the tissues, such as muscles, possibly due to an increase in the insulin levels.

摘要： Security measures for a computer network system can be enhanced with better understanding the vulnerabilities and their behavior over the time. It is observed that the effects of vulnerabilities vary with the time over their life cycle. In the present study, we have presented a new methodology to assess the magnitude of the risk of a vulnerability as a “Risk Rank”. To derive this new methodology well known Markovian approach with a transition probability matrix is used including relevant risk factors for discovered and recorded vulnerabilities. However, in addition to observing the risk factor for each vulnerability individually we have introduced the concept of ranking vulnerabilities at a particular time taking a similar approach to Google Page Rank Algorithm. New methodology is exemplified using a simple model of computer network with three recorded vulnerabilities with their CVSS scores.

摘要： Death of infants from diarrhoea is a common occurrence in sub-Saharan Africa. This is attributed to unhygienic practices which aid the proliferation of diarrhoea-causing microorganisms. Among these microorganisms, Cam- pylobacter species have been reported as one of the causal agents, Campylobacter spp. are human intestinal pathogens of global importance and their pathogenicity mechanisms are not well understood. This study was designed to investigate the molecular characterisation of Campylobacter gotten from cultural methods in Osun State. Campylobacters isolated were biochemically characterized and biotyped. Confirmation of Campylobacter was done using flaA gene, hippuricase O for Campylobacter jejuni and aspartokinase gene for Campylobacter coli and single locus sequencing glnA gene were performed by PCR. Twenty five samples were amplified by PCR out of 57 Campylobacter strains that were positive for cultural methods from 815 stool samples with diarrhoea and 100 stool samples without diarrhoea. No Campylobacter was isolated from stools of children in the control group. Twenty-five isolates comprising of 18 Campylobater jejuni and 7 C. coli were identified. The nucleotide sequence of the gln A for all the isolated Campylobacter spp. showed 91.0% similarity with the ones in the GenBank. The C. jejuni was classified into biotypes I (44.4%) and II (55.6%) and all C. coli were of biotype I.

摘要： The aim of this short review is to describe the role of myosin isoforms during the adaptation of skeletal muscle to prolonged physical activity (for example endurance exercise) and to show the coordination between changes in muscle oxidative capacity and myofibrillar apparatus in slow-twitch and fast-twitch muscles. Adaptational changes in myosin isoforms during long lasting muscle activity (decrease of MyHC IIb isoforms relative content and increase of that MyHC IIa and decrease of MyLC 1 fast isoforms in fast-twitch muscles) are in good coordination with changes of muscle oxidative capacity. These changes show that during regular endurance exercise fast-twitch muscle fibers (type IIA) are also recruited and create the potential source of increase in endurance capacity during the process of adaptation to the prolonged physical activity.

摘要： Cyanobacterial harmful algal blooms (CHAB), caused by eutrophication, are known to threaten both wildlife and human health. Due to urbanization and land use changes, an increase of CHAB’s at a more frequent rate within Barnegat Bay has been observed. In order to detect possible CHAB causing cyanobacteria, water samples were collected from 12 different locations within Barnegat Bay. Each sample was filtered through a 30- and 0.4-μm polycarbonate filter sequentially. Flow cytometry was carried out for the filtrate collected between 0.4- and 30-μm. Chelex DNA extraction, polymerase chain reaction (PCR), and gel electrophoresis were then performed for all sites using four primer sets (27F/785R, PSF/UR, CYA359F/CYA781R and MSF/MSR) designed to detect cyanobacteria. Flow cytometric results indicated the water samples contained a wide range of cyanobacteria, including M. aeruginosa, Cylindrospermum spp., Anabaena spp., and Synechococcus sp. IU 625 ranges from 3.16 to 8.17 × 107 cells·L-1. PCR-based assays suggest that general cyanobacteria as well as phytospecific species were present for all sites, but no toxin-producing Microcystis aeruginosa was detected. Plaque assays demonstrated the presence of cyanophages for S. IU 625, Anabaena spp., and M. aeruginosa at all sites, up to 105 PFU·ml-1.

摘要： 本发明适用于雾计算技术领域，提供了一种雾环境下基于Markov Chain的容错策略选择方法，该方法具体包括如下步骤：S1、对于有N个雾节点的雾系统，预测雾系统中有i个雾节点故障的稳态概率π

摘要： 本发明公开了基于Cuckoo Hash及Chain Hash的Redis集群管理系统及方法，其中方法包括利用一致性hash算法搭建Redis集群，为真实节点设置多个虚拟节点并将其排布到一个具有2^32个均匀分布点的圆环上；接收来自Redis客户端的输入数据和指令，构建二元组并计算输入数据的hash值，调用Cuckoo Hash表的哈希函数H1和H2及Chain Hash表的哈希函数H3计算输入数据在table1、table2、table3的候选位置i1、i2、i3；根据候选位置i1，i2或i3及二元组中指令做相应的数据写入、数据查询、数据更新以及数据删除等操作后，将操作结果反馈给Redis客户端，并更新被操作数据的键频项；利用系统中心模块定期根据键频项的大小，调整table1、table2以及table3中存储数据的存储位置。本发明能够提高数据库数据操作的效率。

摘要： 本发明适用于雾计算技术领域，提供了一种雾环境下基于Markov Chain的容错策略选择方法，该方法具体包括如下步骤：S1、对于有N个雾节点的雾系统，预测雾系统中有i个雾节点故障的稳态概率π

摘要： 本发明涉及一种基于FPGA芯片实现的scan chain电路的测试系统及方法，所述测试系统集成于FPGA芯片上，包括：数据解析单元、存储单元、时序发生单元、控制单元和结果输出单元；方法包括S1，将原始scan chain电路的激励信号和原始scan chain电路的预期输出信号进行数据解析和编码，编码后经过scan chain电路进行激励和存储，并对数据解析单元解析后scan chain电路的预期输出信号进行编码并存储；根据测试scan chain电路的时序波形对经过编码后的scan chain电路的激励信号进行采样，并将采样数据和存储的预期输出信号进行数据比对；输出结果。本发明实现了在小型FPGA平台上对scan chain电路的测试，实现方案价格便宜，测试速度快。

摘要： 本发明公开了commonγ‑chain受体作为药物靶点在制备治疗狼疮性肾炎药物中的应用，通过抑制commonγ‑chain受体功能治疗狼疮性肾炎。用抗体靶向commonγ‑chain受体治疗狼疮性肾炎，其特异性强、毒副作用小。本发明首次研究表明抑制commonγ‑chain受体功能在治疗狼疮性肾炎上具有一定的潜力，首次探究commonγ‑chain受体作为药物靶点在治疗狼疮性肾炎的效用及机制，并研究anti‑commonγ‑chain对Treg、Tfh细胞分化及B细胞自身抗体分泌的影响，为狼疮性肾炎的治疗提供实验基础和新的治疗靶点。

摘要： 本发明涉及一种基于多块FPGA进行IC scan chain电路测试的方法，采用级联扩容的思想，解决单个FPGA作为SCAN CHAIN pattern的存储实体时存储资源不足的问题，通过自定义的FPGA间的通信握手方式，下一级FPGA可以知道上一级FPGA已完成测试，需要启动本级FPGA工作，并在本级FPGA测试完毕后，通知再下一级FPGA开始工作，本发明采用串联链工作原理，实现了庞大的SCAN CHAIN测试向量测试。

摘要： 本发明涉及一种基于FPGA芯片实现的scan chain电路的测试系统及方法，所述测试系统集成于FPGA芯片上，包括：数据解析单元、存储单元、时序发生单元、控制单元和结果输出单元；方法包括S1，将原始scan chain电路的激励信号和原始scan chain电路的预期输出信号进行数据解析和编码，编码后经过scan chain电路进行激励和存储，并对数据解析单元解析后scan chain电路的预期输出信号进行编码并存储；根据测试scan chain电路的时序波形对经过编码后的scan chain电路的激励信号进行采样，并将采样数据和存储的预期输出信号进行数据比对；输出结果。本发明实现了在小型FPGA平台上对scan chain电路的测试，实现方案价格便宜，测试速度快。

摘要： 本申请公开了一种区块链Block chain的同步存储方法、装置及计算机设备，该方法为：将节点中区块链生成的新区块数据存储至所述节点对应的数据库；所述新区块数据存储至所述数据库之后，所述节点中的总块高与所述数据库中的总块高一致；若存储后的所述数据库中的总块高与所述数据库中已校验区块的块高的差值大于区块不可逆阈值，则校验所述数据库中的第一区块与所述节点中的第二区块是否一致；若不一致，则将所述第一区块替换为所述第二区块；其中，所述第一区块为所述数据库中未校验区块中的任一个区块，且所述第一区块的区块编号与所述第二区块的区块编号相同。