基于Navie Bayes算法与k-means聚类算法的财务数据库异常检测

为了有效消除用户异常行为对企业财务数据库所带来的安全隐患,以往的数据库异常检测技术(如Navie Bayes算法)通常采用查询反馈,并建立用户行为特征(用户行为轮廓)的方法查找安全隐患,而该方法构建训练集耗时较多,效果不显著。因此,提出一种基于Navie Bayes算法与k-means聚类算法相结合的财务数据库异常检测技术。通过调取财务数据库运行日志中的用户查询内容及相应结果,采用k-means聚类算法进行用户分组,采用Navie Bayes算法构建异常检测模型。应用测试结果表明,与传统的用户行为轮廓算法相比,所提算法的训练效率更高,准确率大幅提高,综合F_(1)值有所提升,提高了财务数据的安全性。

HIS系统财务数据库异常检测技术及应用

当前,医院信息系统(HIS)已成为医院信息化建设的重要内容,但HIS与财务数据库的接入仍然采用传统的方式,导致财务重要数据存在一定的安全隐患。为了有效消除用户异常行为对医院财务数据库所构成的安全隐患,设计一种财务数据库异常检测技术。通过调取财务数据库运行日志中的用户查询内容及相应结果,采用k-means聚类算法进行用户分组,采用Navie Bayes算法构建异常检测模型。应用测试结果表明,与传统的用户行为轮廓算法相比,所提出的算法准确率提高了7.06个百分点,综合F1值提高了3.33个百分点,此外,在大幅度缩减计算量的基础上模型训练时间缩短了81%,极大地提高了财务数据的安全性。

Treating traumatic brain injury at sea:how to improve the skills and capabilities of the naval medical personnel

Dear Editor,Recent advances in military technology have led to the development of sophisticated and intelligent weapons, which increase mortality and morbidity. Since the advent of highexplosion weapons, "shock wave" has surpassed "shrapnel" and become the most important injurious component in conventional combat. Traumatic brain injury(TBI) is a leading cause of disability and death among military personnel and civilians during wartime[1]. Clinically, its symptoms and indications vary depending on the location and severity of the injury. The most frequently observed symptoms included altered consciousness and local dysfunction.

三维可压两相流扩散界面模型的界面极限分析

主要讨论了三维可压两相流扩散界面模型—Navie r-Stoke s-Cah n-Hilliard(NSCH)方程组中接触界面厚度趋于零时的极限问题,通过渐近匹配展开的方法,从方程组解的渐近极限中推导出相应两相流的自由界面模型及界面条件。

爱可信ALP mini平台开拓便携导航新应用

5月11日，爱可信宣布基于其ALP mini平台的便携式导航设备G-navi（GN-01）在日本上市，并成为首款在日本市场中销售的采用爱可信ALPmini平台的移动设备。G-navi是全球首款支持可扩展矢量图形（SVG）地图库的便携式导航设备（PND），可以快速显示高质量的、更便于用户阅读和使用的地图数据。

Develop Naval Cadets'Global Competence through"Belt and Road"Ini⁃tiative Cooperation and Exchanges

Since the 18th National Congress of Chinese Communist Party,the great call for building a maritime power and a power⁃ful military force has set higher standards for Navy’s development and the application of strategies.As a maritime military force,the navy bears considerable responsibilities of safeguarding territorial sovereignty,maritime rights and interests with security and development as core mission,and defending the role and image of China as a major county in the world.This paper analyzes and studies naval officers’global competence development from three aspects,and discusses the significance and recommendations of strengthening the development of naval cadets’global competence in cooperation and exchange guided by“Belt and Road”Initia⁃tive(BRI).

NAVI泵+APR工具在非自喷井测试中的应用

低压非自喷地层的测试技术通常采用液氮或其它人工助排措施将地层流体举升至地面 ,但由于液氮气举需要连续油管、液氮车、井口等设备 ,因而操作费用较高。若采用NAVI泵排液技术 ,则操作简单、泵效率高 ,因此对低压非自喷地层 ,尤其是稠油井的排液 ,NAVI泵是最佳选择之一。

乍得潜山油藏裸眼试油技术

乍得潜山裸眼段漏失严重,致使打水泥塞时灰面高度难以控制,封层成功率低,MFE等常规测试工具和抽汲排液测试技术难以满足长裸眼段分层测试和稠油井排液测试。根据乍得潜山油藏裸眼段储层特征及井身结构,形成了潜山裸眼常规试油工艺、长裸眼段试油工艺、裸眼桥塞联合注灰封层上返试油工艺、潜山裸眼稠油试油工艺和潜山裸眼测试工作制度。经BC2-1井应用表明,坐套测裸的NAVI泵+APR工具排液测试求得的流动压力和产量均比较稳定,NAVI泵累计运转1 475 min,产液96.746 m^3,产油90.243 m^3,试油效果显著。该裸眼试油系列技术为乍得潜山油藏评价和开发方案编制提供了有力依据。

Inspiration of the functional localization of a US naval hospital ship on a Chinese hospital ship

Through the experience of being stationed on the USS Mercy hospital ship(T-AH19) and a preliminary comprehension of the personnel and material arrangements,processing and functional formats,and the multi-platform contributions of US Navy hospital ships,we briefly introduce the characteristics of US hospital ships regarding medical support,emergency rescue exercises,communications and training,international humanitarian aid,etc.We discuss the function and responsibility of Chinese hospital ships,focusing on the investigation of the construction mode and positioning in the navy.

A review of the physiological and psychological health and wellbeing of naval service personnel and the modalities used for monitoring

Naval cohorts rely heavily on personnel to ensure the efficient running of naval organisations. As such, the wellbeing of personnel is essential. In an occupational setting, naval service personnel experience a variety of physiological and psychological stressors. Most naval services arrange annual physical fitness and body composition tests to ensure the physical readiness of personnel. However, these tests only evaluate a small amount of physiological capabilities. Components such as aerobic and strength capabilities are assessed, however, other components of physical fitness such as speed, agility, anaerobic capacity and flexibility are not. In addition to the physical capabilities, personnel are impacted by fatigue, nutrition and psychological stressors such as copping in stressful situations or dealing with time away from family and friends. This review will discuss the physiological and psychological factors that affect personnel's wellbeing. In addition to this, it will also evaluate the methods that are used to assess both physiological and psychological wellbeing.

Reusable high performance of calcined Mg/Al hydrotalcite for the removal of Navy Blue and Yellow F3G dyes

Water pollution with dye chemicals from apparel industries is a serious problem in the world.Since most of dyes are potentially have toxic and carcinogenic effects on human,it is important to remove them before they are discharged to the environment.Among many methods available for dyes removal in water,adsorption is the easiest and economically feasible that has no major obstacle for practical applications.In the present study,we tested calcined Mg/Al hydrotalcite(Mg/Al CHT)prepared by coprecipitation technique as an adsorbent for the removal of Navy Blue(NB)and Yellow F3G(YF3G)dyes.Mg/Al CHT was characterized by using a Fourier transform infrared(FTIR)spectrometer,an X-ray diffractometer(XRD)and a scanning electron microscope(SEM).The results showed that Mg/Al CHT was highly effective as an adsorbent for the removal of NB and YF3G under mild-acidic condition(pH 4)with removal capacities(b)according to Langmuir isotherm model were 7.97×10^(–4) and 5.80×10^(–4)mol·g^(-1),respectively.Kinetics study showed that the adsorption of NB and YF3D on Mg/Al CHT followed pseudosecond order with rate constant(k_(p2))11.57×10^(3) and 11.75×103 g·mol^(-1)·min-1,respectively.The spent adsorbent can be easily regenerated by simply calcining it at 450℃ for 3 h.Adsorption test on the mixture of NB and YF3G showed that the adsorption capacity of Mg/Al CHT was eightfold higher than that of Mg/Al HT and the value was maintained with repeated use.

NAVI泵与抽汲技术在苏丹成功应用和实例对比

NAVI泵与抽汲作业在苏丹的成功应用表明,NAVI泵可以防止地层出砂,比电潜泵成本低、省时间,更适合于低压高渗透的地层。抽汲作业必须在干净的油管中进行,与射孔测试联作,节省起下管柱的成本。使用NAVI泵和抽汲作业都能使地层流体尽快达到拟稳定状态,取得合格的地层资料,缩短了测试周期,节约了成本。

Efficacy of Trifluralin Compared to Ethalfluralin Applied Alone and Co-Applied with Halosulfuron for Weed Management in White Bean

There are a limited number of herbicides registered for weed management in white bean production in Ontario, Canada. Five field experiments were completed in Ontario from 2016 to 2018 to compare the efficacy of trifluralin and ethalfluralin applied alone and in combination with halosulfuron, applied preplant incorporated (PPI), for weed control efficacy and white bean tolerance and seed yield. At 2 and 4 WAE, there was no white bean injury from the herbicide treatments evaluated. Trifluralin applied PPI provided up to 32%, 99%, 13%, 99%, 27%, 99% and 99% control of velvetleaf, redroot pigweed, common ragweed, common lambsquarters, wild mustard, barnyardgrass and green foxtail, respectively. Trifluralin and ethalfluralin provide similar control of velvetleaf, redroot pigweed, barnyardgrass and green foxtail control, however, ethalfluralin is slightly more efficacious on common ragweed, common lambsquarters and wild mustard. Halosulfuron (35 g∙ai∙ha−1), applied PPI, provided as much as 76%, 98%, 96%, 96%, 100%, 19% and 23% control of velvetleaf, redroot pigweed, common ragweed, common lambsquarters, wild mustard, barnyardgrass and green foxtail, respectively. Trifluralin (600 or 1155 g∙ai∙ha−1) + halosulfuron (35 g∙ai∙ha−1), applied PPI, provided up to 88%, 100%, 98%, 100%, 100%, 99% and 98% control of velvetleaf, redroot pigweed, common ragweed, common lambsquarters, wild mustard, barnyardgrass and green foxtail, respectively. Ethalfluralin (810 or 1080 ai∙ha−1) + halosulfuron (35 g∙ai∙ha−1) provided similar control. Weed interference decreased white bean seed yield 44% - 45% with trifluralin, 30% - 41% with ethalfluralin and 34% with halosulfuron. However, decreased weed interference with trifluralin and ethalfluralin applied in combination with halosulfuron resulted white bean seed yield that was similar to the weed-free control. Trifluralin or ethalfluralin co-applied with halosulfuron can be safely used in white bean production for the control of common annual grass and broadleaf weeds in Ontario.

K1电视职业联赛第1赛季:幸运的天禄

夺冠热门Na＇Vi小组未出线 5月26日，由世纪天成举办的K1电视职业联赛正式拉开帷幕，七支中国队伍加乌克兰战队NaVi构成了本次参加CSOL项目的队伍名单。在率先进行的A组比赛中，

1783~1793年英国海军舰船和人员领域的策略探析

1783年《凡尔赛和约》的签订,标志着英第一帝国的正式解体①。此后,英国社会各界开始对第一帝国解体的教训进行深刻反思,并思考英国未来的命运。尽管未能保全在北美的优势,但战线的延伸和海疆的急遽膨胀,仍促使英国人将目光投向更为遥远的大洋深处,英军舰船的任务也不再是拱卫本土、海峡和北海海域,对于海疆的认知和管控模式也相应地发生变化。

清季海防股与海军衙门关系考辨

海防股与海军衙门是清廷应对中法战事期间先后创设的两类机构。海防股是总理衙门于光绪九年十二月(1884年1月)奏请添设的办事分股,属于辅助总署大臣处理海防事务的文秘助手,海军衙门是慈禧于光绪十一年九月(1885年10月)依议准设的专务部门,属于主持地方海防事业的领导机构。两者同时并存近十年,直至甲午战败、北洋海军覆灭,又同遭裁撤。由于官方文献记载的含混与缺失,学界误将海防股视作海军衙门前身,误认为两者等同于近代西方国家的海军部。①有鉴于此,本文依据相关史料,辨析海防股与海军衙门筹设过程、成立宗旨、权责职掌、实际功能等问题,厘清两者关系及历史地位,以期推动晚清海军史、海防史研究。

Predictive modelling for COVID-19 outbreak control:lessons from the navy cluster in Sri Lanka

In response to an outbreak of coronavirus disease 2019(COVID-19)within a cluster of Navy personnel in Sri Lanka commencing from 22nd April 2020,an aggressive outbreak management program was launched by the Epidemiology Unit of the Ministry of Health.To predict the possible number of cases within the susceptible population under four social distancing scenarios,the COVID-19 Hospital Impact Model for Epidemics(CHIME)was used.With increasing social distancing,the epidemiological curve flattened,and its peak shifted to the right.The observed or actually reported number of cases was above the projected number of cases at the onset;however,subsequently,it fell below all predicted trends.Predictive modelling is a useful tool for the control of outbreaks such as COVID-19 in a closed community.

船舶复合材料强度极限状态与设计方法方面的近来工业进展

To further exploit the potential of marine composites applications in building ship hulls,offshore structures,and marine equipment and components,design approaches should be improved,facing the challenge of a more comprehensive and explicit assessment of appropriately defined limit states.The structure ultimate/limit conditions shall be verified in principle within the whole structural domain and throughout the ship service life.What above calls for extended and reliable materials characterization on the one hand and for accurate and wide-ranging procedures in structural analyses.This paper presents an overview of recent industrial developments of marine composites limit states assessments and design approaches,as available in open literature,focusing on pleasure crafts and yachts as well as navy ships and thus showing a starting point to fill the gap in this respect.After a general introduction about composites characterization techniques,current design practice and rule requirements are briefly summarized.Both inter-ply and intra-ply failure modes and corresponding limit states are then presented along with recently proposed assessment approaches.Three-dimensional aspects in failure modes and manufacturing methods have been identified as the main factors influencing marine composite robustness.Literature review highlighted also fire resistance and hybrid joining techniques as significant issues in the use of marine composites.

Offshore Training in Navy Personnel Is Associated with Uninvestigated Dyspepsia

To investigate the known and new factors associated with uninvestigated dyspepsia （UD）, we surveyed 8600 Chinese navy personnel with offshore training shorter than 1 month or longer than 9 months per year. All respondents were required to complete a questionnaire covering demographics, the Chinese version of the Rome Ⅲ survey, eating habits, life styles, and medical and family history. The response rate was 94.3% （8106/8600） with 4899 respondents qualified for analysis, including 1046 with offshore training and 3853 with onshore training. The prevalence of UD was higher in the offshore group than in the onshore group （12.6% vs. 6.9%, P〈0.001）, with a general prevalence of 8.1%. The subjects with offshore training were more likely to suffer from UD and postprandial distress syndrome （OR= 1.955 95% CI 1.568-2.439, P〈0.001 and OR=1.789, 95% CI 1.403-2.303, P〈0.001, respectively）. The mul- tivariate logistic regression analysis showed UD was associated with offshore training （OR=1.580, 95% CI 1.179-2.118, P=-0.002）, family history （OR=1.765, 95% CI 1.186-2.626, P=0.005） and smoking （OR=1.270, 95% CI 1.084-1.488, P=0.003）, but not with alcohol drinking. The association between dysentery history and UD was undetermined/borderline （P=0.056-0.069）. In conclusion, we identified offshore training as a new factor associated with UD, and also confirmed 2 known associated factors, family history and smoking.

A scenario construction and similarity measurement method for navy combat search and rescue

Navy combat search and rescue(NCSAR) is an important component of the modern maritime warfare and the scenario of NCSAR is the basis for decision makers to rely on. According to the core elements in the NCSAR process, the NCSAR scenario structure is constructed from seven perspectives based on the multi-view architecture framework. According to the NCSAR scenarios evolution over time, the NCSAR scenario sequence is analyzed and modeled based on the concept lattice method. Then,the incremental construction algorithm of the NCSAR scenario sequence lattice is given. On this basis, the similarity measurement index of NCSAR scenarios is defined, and the similarity measurement model of NCSAR scenarios is proposed. Finally, the rationality of the method is verified by an example analysis. The NCSAR scenario and similarity measurement method proposed can provide scientific guidance for rapid making, dynamic adjustment and implementation of the NCSAR program, and thus improve the efficiency and effectiveness of NCSAR.