Attack on Optical Double Random Phase Encryption Based on the Principle of Ptychographical Imaging

The principle of ptychography is applied in known plain text attack on the double random phase encoding （DRPE） system. We find that with several pairs of plain texts and cipher texts, the model of attack on DRPE can be converted to the model of ptyehographical imaging. Owing to the inherent merits of the ptyehographical imaging, the DRPE system can be breached totally in a fast and nearly perfect way, which is unavailable for currently existing attack methods. Further, since the decryption keys can be seen as an object to be imaged from the perspective of imaging, the ptychographical technique may be a kind of new direction to further analysis of the security of other encryption systems based on double random keys.

Effects of Depth of Needle Insertion with Risperidone Long-Acting Injectable in Persons with Schizophrenia: A Randomized Double-Blind Study

In some cases, if the insertion depth is shallower than expected, intramuscular (IM) injection of risperidone long-acting injectable (RLAI) may not penetrate the muscle fascia. However, if needle insertion depth is deeper than anticipated, needle penetration may cause damage to nerves, arteries and veins. Few clinical studies were done to evaluate the depth of needle length insertion reaching the intended gluteal muscle. The aim of this study was to evaluate the suitable depth of injecting RLAI. Twenty-six patients with schizophrenia were treated with RLAI, and randomly divided into two groups: 50 mm needle inserted group (Group-D, deep insertion, n = 13) and 20 mm needle insertion group (Group-S, shallow insertion, n = 13). For Group-S, the needle length was marked with a spacer at exactly 20 mm. Injections were performed by the psychiatrist or nurse, alternating between the two gluteal sites by double-cross method every two weeks. Clinical psychotic symptoms and injection site reactions were recorded throughout the study period. Experienced psychologists who were blinded from the needle-length experimental variable evaluated patients’ psychotic symptoms using the Positive and Negative Syndrome Scale (PANSS) every two weeks. The plasma 9-hydroxyrisperidone (9-OH-RIS) concentrations were measured every two weeks;comparison data were determined on the 8th week and the 14th week. No significant difference was observed in 9-OH-RIS concentrations, psychotic symptoms, injection site skin reactions of subjects in both groups. However, in Group-D, injection site adverse reactions were confirmed in two subjects (15%). In Group-S, injection site reactions were confirmed in six subjects (46%). Although effective 9-OH-RIS concentrations were obtained with the insertion using both depth, it was concluded that the 50 mm insertion length was more suitable for dorsogluteal IM injections in adult patients with schizophrenia as demonstrated by the incidence of local adverse skin reactions.

Three-dimensional image authentication using binarized images in double random phase integral imaging

We proposed a three-dimensional (3D) image authentication method using binarized phase images in double random phase integral imaging (Ini). Two-dimensional (2D) element images obtained from Ini are encoded using a double random phase encryption (DRPE) algorithm. Only part of the phase information is used in the proposed method rather than using all of the amplitude and phase information, which can make the final data sparse and beneficial to data compression, storage, and transmission. Experimental results verified the method and successfully proved the developed 3D authentication process using a nonlinear cross correlation method.

Antibiotics for lower respiratory tract infection in children presenting in primary care in England (ARTIC PC): a double-blind, randomised, placebo-controlled trial

Methods:ARTIC PC was a double-blind,randomised,placebo-controlled trial done at 56 general practices in England.Eligible children were those aged 6 months to 12 years presenting in primary care with acute uncomplicated LRTI judged to be infective in origin,where pneumonia was not suspected clinically,with symptoms for less than 21 days.Patients were randomly assigned in a 1:1 ratio to receive amoxicillin 50 mg/kg per day or placebo oral suspension,in three divided doses orally for 7 days.Patients and investigators were masked to treatment assignment.The primary outcome was the duration of symptoms rated moderately bad or worse(measured using a validated diary)for up to 28 days or until symptoms resolved.The primary outcome and safety were assessed in the intention-to-treat population.The trial is registered with the ISRCTN Registry(ISRCTN79914298).

Thermal stability and data retention of resistive random access memory with HfOx/ZnO double layers

As an industry accepted storage scheme, hafnium oxide（HfO_x） based resistive random access memory（RRAM）should further improve its thermal stability and data retention for practical applications. We therefore fabricated RRAMs with HfO_x/ZnO double-layer as the storage medium to study their thermal stability as well as data retention. The HfO_x/ZnO double-layer is capable of reversible bipolar switching under ultralow switching current（〈 3 μA） with a Schottky emission dominant conduction for the high resistance state and a Poole–Frenkel emission governed conduction for the low resistance state. Compared with a drastically increased switching current at 120℃ for the single HfO_x layer RRAM, the HfO_x/ZnO double-layer exhibits excellent thermal stability and maintains neglectful fluctuations in switching current at high temperatures（up to 180℃）, which might be attributed to the increased Schottky barrier height to suppress current at high temperatures. Additionally, the HfO_x/ZnO double-layer exhibits 10-year data retention @85℃ that is helpful for the practical applications in RRAMs.

Double Autocorrelation in Two Way Error Component Models

In this paper, we extend the works by [1-5] accounting for autocorrelation both in the time specific effect as well as the remainder error term. Several transformations are proposed to circumvent the double autocorrelation problem in some specific cases. Estimation procedures are then derived.

Modeling and Analysis of a Random Excited Double-Clamped Piezoelectric Energy Harvester

A double-clamped piezoelectric energy harvester subjected to random excitation is presented,for which corresponding analytical model is established to predict its output characteristics.With the presented theoretical natural frequency and equivalent stiffness of vibrator,the closed-form expressions of mean power and voltage acquired from the double-clamped piezoelectric energy harvester under random excitation are derived.Finally theoretical analysis is conducted for the output performance of the doubleclamped energy harvester with the change of spectrum density（SD）of acceleration,load resistance,piezoelectric coefficient and natural frequency value,which is found to closely agree with Monte Carlo simulation and experimental results.

The Efficacy and Safety of a Patent Pending Combination of Ginger and Goldenrod Extracts on the Management of Cold Symptoms: A Randomized, Double-Blind Controlled Trial

Objective: In a randomized, double-blind, exploratory, active-controlled trial, the efficacy and safety of a patent-pending combination of Ginger and Goldenrod extracts (BDI-630) in alleviating cold symptoms in community-dwelling adults was compared to a combination of standardized amounts of Echinacea (EC) components. Methods: 44 healthy adults, experiencing new onset of cold symptoms were randomly assigned to receive either BDI-630 (900 mg) or EC (500 mg) twice daily for 10 days. The severity of cold symptoms and the quality of life was assessed by self-reporting of subjects using the Wisconsin Upper Respiratory Symptom Survey (WURSS-21? 2004). Results: The intent-to-treat population (ITT) consisted of 44 subjects (n = 22 for BDI-630;n = 22 for EC). The modified ITT (mITT) population consisted of 40 subjects, excluding four subjects with major protocol deviations related to inclusion/exclusion criteria and/or use of prohibited drugs from the efficacy analysis (n = 3 for BDI-630 and n = 1 for EC). Results indicated a sig-nificant difference between the two groups: the superiority of BDI-630 over EC was particularly noticeable between Day 1 and Day 7, as demonstrated by a 14-fold difference of the mean percentage of change of total score from baseline in the mITT population. Adverse events (AEs) following the intake of BDI-630 were mostly limited to mild gastrointestinal intolerance in less than 10% of the subjects. Conclusions: BDI-630 was shown to be more effective than EC in alleviating cold symptoms in the adult population, particularly during the first 7 days of treatment. BDI-630 was very well tolerated by all subjects.

短视频平台公共政策传播的信息框架效应——基于“双减”政策的视频内容分析与实验

[目的/意义]短视频作为新兴的互联网信息表达方式,已逐渐成为政策传播的重要工具。探索短视频平台在公共政策信息传播中的效力以及受众采纳意愿,有助于提升公共政策传播效果。[研究设计/方法]以“双减”政策为例,根据框架效应理论和信息采纳理论,通过内容分析法归纳总结短视频平台中“双减”政策信息框架的组织方式,同时分析不同政策信息框架对传播效果的影响;此外,采用在线控制实验法验证了不同政策信息框架对受众采纳意愿的影响。[结论/发现]在短视频平台中有近四成的信息使用了目标框架,其中损失框架居多,多数采用集体主义视角和非叙事陈述方式;目标框架、文化框架、叙事框架对受众的评论、转发、点赞意愿并未产生显著影响;双减政策信息中,损失、收益框架,集体、个人主义价值观以及叙事和非叙事要素都能增强受众的采纳意愿,并且目标框架与文化框架之间存在交互效应。[创新/价值]研究结论对于政策宣传部门及相关政府机构优化政策传播策略,提高传播效果具有启示作用。

基于网格优化双层随机森林的采空区煤氧化升温预测研究

为了对采空区煤氧化升温的温度进行预测,在内蒙古某煤矿16402综放工作面进行长期的采空区气体和温度观测实验,采集到准确的采空区煤氧化升温过程中气体及温度数据,提出1种基于网格优化双层随机森林(WG-DRF)的采空区煤氧化升温预测方法,用该方法构建预测模型并与传统随机森林、BP神经网络和支持向量回归模型的预测结果进行对比。研究结果表明:WG-DRF模型预测的平均绝对误差MAE,均方误差MSE,决定系数R~2分别为1.725,6.158,0.903,优于其他模型。通过更换数据集对WG-DRF方法进行测试,验证双层随机森林模型具有较强的泛化性。研究结果可为采空区煤氧化升温的温度预测提供参考。

基于双边界二分式CVM的适老化改造支付意愿研究

居民的支付意愿对于既有住区适老化改造的成功推行起着至关重要的作用。基于双边界二分式CVM方法,通过问卷调查收集数据,进行二元Logistic回归分析,对扬州市既有住区公共空间适老化改造的支付意愿及其影响因素进行研究。结果显示,约58.62%的受访者愿意支付,平均支付金额为343.69元/年/户。调研数据显示,2022年扬州市既有住区公共空间适老化改造的总价值约为113421万元;支付意愿与投标值、学历、收入水平、家庭状况、户外活动频率和认知程度相关。了解居民的支付意愿可为改善适老化改造筹资机制和政策制定提供依据,推动更有效的改造实施,以满足人口老龄化带来的需求。

“双减”政策的公众情绪演进及其对公共政策传播的启示——基于微博文本数据的挖掘分析

[目的/意义]线上公共政策的话题越来越受关注,把握公众对公共政策的情绪倾向对政策落实和推进具有重要意义。[方法/过程]通过社交媒体平台的文本信息挖掘测度公众的情绪状态,研究考察“双减”政策推行过程中微博平台用户的情绪状态和演进趋势特征,采用情感词典匹配提取公众对于“双减”政策的情感关键词,划分情绪类别;通过机器学习模型测度公众情绪倾向的演进趋势。[结果/结论]公众对“双减”政策的情绪反应以积极情绪为主导,但其整体情绪走向经过了螺旋上升的演化过程。“双减”政策发布初期以消极情绪为主,在相关部门政策解读、配套政策补充下,有效引导了公众情绪向积极转变,积极情绪逐步占据主导地位。

双种群协同演化的改进蜜獾算法

针对蜜獾算法存在的局部搜索能力不足、易陷入局部最优值等问题,提出一种双种群协同演化的改进蜜獾算法。在初始化阶段采用Cubic混沌映射对种群进行初始化,扩大可行解的搜索范围并提高种群的分布均衡性;引入融合黏菌算法和蜜獾算法的双种群优化机制,依托两者的更新优势协同推进个体逼近目标位置,进而提高整个算法的搜索效率和优化性能;采用柯西随机反向扰动策略对蜜獾种群最优位置进行扰动,以提高算法跳出局部最优的能力。通过评估单一策略的改进有效性实验、与七种对比算法的不同高维实验以及Wilcoxon秩和检验,结果表明该算法具有良好的收敛精度和求解速度。最后将改进算法应用于压缩弹簧设计和压力容器设计问题,进一步验证了改进策略的有效性及该算法的工程实用性。

“双一流”背景下公共卫生与预防医学硕士研究生创新能力培养的实施路径

高水平的研究生教育是“双一流”建设的关键,也是创新型国家高等教育的典型特征以及我国高等教育的发展方向。探讨公共卫生与预防医学硕士研究生创新能力培养存在的问题,提出创新能力培养的实施路径,以期为建立高水平的公共卫生专业人才培养体系、培养具有创新思维和创新能力的高级专业人才提供参考。

基于小波压缩深度学习重构的多图像光学加密

为解决多图像加密算法密文体积大、加密效果差、重构效果不理想等问题,提出一种基于小波压缩和深度学习重构的多图像光学加密方法。利用小波压缩提取多图像的低频部分,将重排后的新图放入改进的FDT-DRPE光学加密系统中得到密文;利用矢量分解和螺旋相位变换克服FDT-DRPE不敏感问题;构造的L_S混沌系统提高密钥敏感性。提出新型深度学习网络模型BHCN,解决传统图像重构精度不高问题。实验结果表明,密文体积可压缩至原图的1/4,重构图像的峰值信噪比为34.57 dB,结构相似性为0.9521,与同类文献相比,速度更快,重构效果更好,安全性更高。

教育“双减”政策下义务教育阶段学生公共数字文化服务可及性测度

探究“双减”政策颁布后公共文化服务机构能否适应义务教育阶段学生需求转变,公共数字文化服务供给与义务教育阶段学生需求是否达到“适配”标准。结合公共数字文化服务可及性的相关研究,文章基于义务教育阶段学生视角提出可及性五维测度体系。以问卷调研的数据为基础,采用优序图法和CRITIC法组合赋权各级指标,计算出公共数字文化服务可及性的最终得分为3.661。通过对公共数字文化服务可及性各级得分与权重进一步分析解读,发现可知晓性与可适应性评分总体偏低、服务人员数量和素质不足的问题贯穿始终,提出宣传进校园、丰富志愿团队、减少技术性障碍、建立对话平台、加强人员培训的建议,为提升义务教育阶段学生公共数字文化服务可及性提供参考。

“双一流”建设背景下治安学学科建设路径选择——以湖北警官学院为例

治安学是公安学下的二级学科,国家新一轮的“双一流”建设为治安学学科建设带来了机遇和挑战。当前治安学学科已形成了较为完整的学科体系,并取得了较为丰硕的学科建设成果,但在理论研究、学科队伍建设及服务社会发展等方面还面临一些问题。文章从强化学科人才培养保障、搭建学术共同体、加强学科队伍建设三方面指出了当前推进治安学学科建设的主要路径,以促进治安学学科内涵式发展。

参与PPP项目可以提高上市企业的融资效率吗?——基于中国上市企业的证据

在推动经济整体好转、大力提振市场信心的背景下,政府和社会资本合作(PPP)模式通过引导社会资本投向,激发民间投资活力,在稳增长、优结构方面发挥着重要作用。本文基于2013~2022年中国A股上市企业的微观数据,运用多期双重差分法,实证评估了参与PPP项目对上市企业融资效率的影响效果。研究发现:参与PPP项目可以显著提高上市企业的融资效率,在进行平行趋势检验、安慰剂检验、反事实检验、控制非平行趋势和PSM-DID回归后,这一结论依旧稳健;信息不对称在参与PPP项目和上市企业融资效率之间发挥中介作用。此外,与国有企业相比,民营企业参与PPP项目对其融资效率的提高作用效果更加显著。

公安院校国家级一流本科专业建设点发展探析

“双万计划”是推动我国高等教育内涵式发展的重大战略,在该计划的三轮评选中,有20所公安本科院校一共获批78个国家级一流本科专业建设点,涵盖23个专业类别。其中,公安部直属院校获批的建设点数量多,传统公安专业和特色优势专业获批的概率相对大,揭示了公安院校专业发展呈现出同质化和差异化并存的基本特征。公安院校应着力从课程体系架构、专业服务实战能力建设、学科交叉融合、评价指标体系完善、双师型师资队伍建设等方面入手,大力推进国家级一流本科专业建设点建设,并瞄准公安行业重大需求,统筹兼顾其他专业,实现专业建设内涵式发展。

“双减”视域下少年儿童文化产品的供需困境与优化路径

文以载道、文以植德,文化的独特价值和功能决定了少年儿童的文化素质涵育需要从中华优秀传统文化中汲取源源不断的养料,内化于心,外化于行。“双减”政策落地以来,优化丰富少年儿童文化供给、促进供需匹配以填补“课余真空”显得愈加重要与迫切。文章以文化产品供需研究的视角观察“双减”政策落地后的教育改革实践,总结概括少年儿童课堂内外的文化产品服务供给发展的现状,并详细分析少年儿童文化产品市场供需错配、错位的矛盾和困境针对性地提出优化路径。为落实“双减”政策的价值意涵,优化儿童文化产品供给,需学校、政府、公共文化机构等多方主体协同配合,借力数字互联势能,打造儿童友好、适配高效的文化产品供给体系。