A guidance and control design with reduced information for a dual-spin stabilized projectile

In this paper,an integrated guidance and control method based on an adaptive path-following controller is proposed to control a spin-stabilized projectile with only translational motion information under the constraint of an actuator,uncertainties in aerodynamic parameters and measurements,and control system complexity.Owing to the fairly high rotation speed,the dynamic model of this missile is strongly nonlinear,uncertain and coupled in pitch,yaw and roll channels.A theoretical equivalent resultant force and uncertainty compensation method are comprehensively used to realize decoupling of pitch and yaw.In response to the strong nonlinear and time-varying characteristics of the dynamic system,the quasi-linear model whose parameters are obtained by interpolation of points selected as the segmentation points in the trajectory envelope,is used for calculation in each step.To cope with the system uncertainty caused by model approximation,parameter uncertainty and ballistic interference,an extended state estimator is used to compensate the output feedback according to the test ballistic angle.In order to improve the tracking efficiency and ensure the tracking error convergence with only translational motion information,the virtual guide point,whose derivative is deduced according to the Lyapunov principle,is calculated in real time according to the projection relationship between the real-time position and the reference trajectory,and a virtual line-of-sight angle and the backstepping method are used for the design of the guidance and control system.In order to avoid the influence of control input saturation on the guidance and control performance due to the actuator limitation and improve the robustness of the system,an anti-saturation compensator is designed according to the two-step method.The feasibility and effectiveness of the path-following controller is verified through closed-loop flight simulations with measurement,control,and condition uncertainties.The results indicate that the designed controller can converge to the reference path and evidently decrease the distance between the impact point and target under different uncertainties.

Study on Service Platform of Kunming Landscaping Plants Information

For the purpose of Kunming City’s landscaping development and satisfying the needs of botanical garden workers who demand to quickly obtain landscaping plants information and select tree species, a landscaping plant information database was established, which contained almost all Kunming botanical garden plants information. This database was based on Kunming natural environment conditions, and finished by hard work of collecting and analyzing relevant written materials as well as pictures of garden plants. By using B/S Structure model, dynamic web programming language ASP and Photoshop, Dreamweaver as software tools, a Web-based illustrated remote consultation service system of landscaping plants information was constructed.

基于信息系统的会诊互评功能对提升院内会诊质量管理的实践探索

目的评估和优化医院内会诊流程,以提高会诊效率和质量,应对临床会诊量不断增长带来的挑战。方法基于医院信息系统的电子会诊评价功能,收集并分析了各科室申请会诊医师及参与会诊医师对会诊质量、及时性、会诊准备及必要性的评价。使用秩和检验和Bonferroni法进行统计分析,评估不同科室类型间会诊评价的差异。结果不同科室的会诊质量、及时性、准备和必要性存在显著差异。儿科、ICU类、中医科的会诊质量好评率最高,而急诊的会诊准备好评率最低。此外,内科、国际医疗的会诊必要性评价高于外科。结论优化会诊流程,加强对申请、准备、响应、反馈等各个环节的把控,畅通科室间沟通机制,明确会诊目的,对于提高会诊效率至关重要。通过建立信息化会诊互评机制,可以为提升会诊质量和会诊效率提供管理抓手。

以护士为主导的门诊多学科信息化会诊平台的优化及应用

目的:优化以护士为主导的门诊多学科信息化会诊平台,并评价该平台的应用效果。方法:以护士为主导组建平台优化团队,联系多部门对平台进行优化升级。采用前后对照研究,以2022年9月—2023年12月在我院进行门诊多学科合作(MDT)会诊的病人为研究对象,分析平台优化前后会诊平台的应用效果。结果:平台主要优化功能包括智能匹配会诊团队、智能推送健康宣教、新增会诊后随访功能。平台优化后,明确诊疗计划占比较会诊前显著提升(P=0.002),会诊等待时间<48 h的比例增加(P=0.010),会诊服务满意度和健康管理知识水平无明显改变。结论:以护士为主导的门诊MDT智能化会诊平台能够显著提升会诊效果,缩短会诊等待时间。

基于信息技术的院外延伸护理在1型糖尿病患儿中的应用

目的:探讨基于信息技术的院外延伸护理在1型糖尿病患儿中的应用效果。方法:选取2022年1月—2023年12月本院1型糖尿病患儿120例为研究对象,根据随机数字表法分为对照组及干预组,对照组(60例)采用传统院外延伸护理,干预组(60例)采用基于信息技术的院外延伸护理,两组均进行3个月随访。观察两组干预前、干预3个月后空腹血糖值、最低血糖值、血糖监测依从性及生活质量水平,比较3个月内再入院情况。结果:干预后干预组空腹血糖值低于对照组,最低血糖值高于对照组,差异均有统计学意义(P<0.05);干预组血糖监测依从性高于对照组,差异有统计学意义(P<0.05);随访3个月内干预组因血糖控制不佳和因糖尿病并发症再入院率均低于对照组,儿童生活质量量表(ISLQ)评分高于对照组,差异有统计学意义(P<0.05)。结论:基于信息技术的院外延伸护理能改善1型糖尿病患儿血糖水平与血糖监测依从性,降低患儿再入院率,同时有助于提高患儿生活质量。

二轮延包的公平路径:信息公开与民主协商能否促进农户政策支持?

构建公平路径并提升农户对政策的支持度,是确保二轮延包工作顺利推进的核心。基于贵州省XF县、河南省PY县试点探索,并借鉴IAD框架,探讨通过信息公开与民主协商,搭建二轮延包过程公平的可行路径。研究发现:(1)信息公开与民主协商作为IAD框架中的相互作用部分,理论上可发挥过程公平作用;(2)二轮延包中,信息公开与民主协商体现在“政策宣传”与“方案制定”两环节。两试点地有着不同的设计模式,且河南省PY县的公平效用要强于贵州省XF县;(3)信息公开与民主协商能显著提升农户政策支持度,两者存在交互效应,且可通过农户公平感知影响农户政策支持度。各地应重视信息公开与民主协商,设计体现公平的延包实施方案、强化延包实施的过程公平、建立农村土地承包经营权动态公平管理机制。

Information Flow Scheduling in Concurrent Multi-Product Development Based on DSM

Multi-product collaborative development is adopted widely in manufacturing enterprise, while the present multi-project planning models don＇t take techni- cal/data interactions of multiple products into account. To decrease the influence of technical/data interactions on project progresses, the information flow scheduling models based on the extended DSM is presented. Firstly, infor- mation dependencies are divided into four types： series, parallel, coupling and similar. Secondly, different types of dependencies are expressed as DSM units, and the exten- ded DSM model is brought forward, described as a block matrix. Furthermore, the information flow scheduling methods is proposed, which involves four types of opera- tions, where partitioning and clustering algorithm are modified from DSM for ensuring progress of high-priority project, merging and converting is the specific computation of the extended DSM. Finally, the information flow scheduling of two machine tools development is analyzed with example, and different project priorities correspond to different task sequences and total coordination cost. The proposed methodology provides a detailed instruction for information flow scheduling in multi-product development, with specially concerning technical/data interactions.

Coping up with the Information Overload in the Medical Profession

The recent technological advancement has proved to be tremendously helpful for medical consultants. However, this advancement has also generated an enormous volume and variety of data, with a high velocity causing an information load for the medical consultants. Information overload can be defined as a difficulty a person can have in comprehending issue and making judgments that are caused by the presence of too much information. Information overload occurs when the amount of input to a system surpasses its processing capability. Decision-makers have a limited cognitive processing ability. Consequently, when information overload happens, it is possible that a decline in decision quality will take place. Decision-makers, such as medical consultants, have fairly limited cognitive processing capacity. Consequently, when information overload occurs, it is likely that a reduction in decision quality will occur. The aim of this study is to assess the impact of information overload on medical consultants’ life, its causes, and potential ways to deal with it. We performed a literature review to find the effects of information overload on medical consultants. Twelve research papers were considered for thematic analysis using NVivo 10 tool. These papers revealed four themes: 1) traditional methods of data collection;2) modern ways of data collection;3) consequences of modern ways of data collection;and 4) the need for handling information overload. This study suggests the development of a Continuing Professional Development course that explains how to deal with information overload, and availing the same through E-Learning mode might be one immediate solution.

Information seeking and anxiety among colonoscopy-na?ve adults: direct-to-colonoscopy vs traditional consult-first pathways

AIM To investigate the effects of direct to colonoscopy pathways on information seeking behaviors and anxiety among colonoscopy-na?ve patients.METHODS Colonoscopy-na?ve patients at two tertiary care hospitals completed a survey immediately prior to their scheduled outpatient procedure and before receiving sedation.Survey items included clinical pathway(direct or consult),procedure indication(cancer screening or symptom investigation),telephone and written contact from the physician endoscopist office,information sources,and pre-procedure anxiety.Participants reported pre-procedure anxiety using a 10 point scale anchored by "very relaxed"(1) and "very nervous"(10).At least three months following the procedure,patient medical records were reviewed to determine sedative dose,procedure indications and any adverse events.The primary comparison was between the direct and consult pathways.Given the very different implications,a secondary analysis considering the patient-reported indication for the procedure(symptoms or screening).Effects of pathway(direct vs consult) were compared both within and between the screening and symptom subgroups.RESULTS Of 409 patients who completed the survey,34% followed a direct pathway.Indications for colonoscopy were similar in each group.The majority of the participants were women(58%),married(61%),and internet users(81%).The most important information source was family physicians(Direct) and specialist physicians(Consult).Use of other information sources,including the internet(20% vs 18%) and Direct family and friends(64% vs 53%),was similar in the Direct and Consult groups,respectively.Only 31% of the 81% who were internet users accessed internet health information.Most sought fundamental information such as what a colonoscopy is or why it is done.Pre-procedure anxiety did not differ between care pathways.Those undergoing colonoscopy for symptoms reported greater anxiety [mean 5.3,95%CI: 5.0-5.7(10 point Likert scale)] than those for screening colonoscopy(4.3,95%CI: 3.9-4.7).CONCLUSION Procedure indication(cancer screening or symptom investigation) was more closely associated with information seeking behaviors and pre-procedure anxiety than care pathway.

Contribution in Information Signal Processing for Solving State Space Nonlinear Estimation Problems

In this paper, comprehensive methods to apply several formulations of nonlinear estimators to integrated navigation problems are considered and developed. The problem of linear and nonlinear filters such as Kalman Filter (KF) and Extended Kalman Filter (EKF) is stated. Analog solution which is based on fisher information matrix propagation for linear and nonlinear filtering is also developed. Additionally, the idea of iterations is included through the update step both for Kalman filters and Information filters in order to improve accuracy. Through this development, two new formulations of High order Kalman filters and High order Information filters are presented. Finally, in order to compare these different nonlinear filters, special applications are analyzed by using the proposed techniques to estimate two well-known mathematical state space models, which are based on nonlinear time series used to apply these estimation algorithms. A criterion used for comparison is the root mean square error RMSE and several simulations under specific conditions are illustrated.

Solution of Algebraic Lyapunov Equation on Positive-Definite Hermitian Matrices by Using Extended Hamiltonian Algorithm

This communique is opted to study the approximate solution of the Algebraic Lyapunov equation on the manifold of positive-definite Hermitian matrices.We choose the geodesic distance between􀀀AHX􀀀XA and P as the cost function,and put forward the Extended Hamiltonian algorithm(EHA)and Natural gradient algorithm(NGA)for the solution.Finally,several numerical experiments give you an idea about the effectiveness of the proposed algorithms.We also show the comparison between these two algorithms EHA and NGA.Obtained results are provided and analyzed graphically.We also conclude that the extended Hamiltonian algorithm has better convergence speed than the natural gradient algorithm,whereas the trajectory of the solution matrix is optimal in case of Natural gradient algorithm(NGA)as compared to Extended Hamiltonian Algorithm(EHA).The aim of this paper is to show that the Extended Hamiltonian algorithm(EHA)has superior convergence properties as compared to Natural gradient algorithm(NGA).Upto the best of author’s knowledge,no approximate solution of the Algebraic Lyapunov equation on the manifold of positive-definite Hermitian matrices is found so far in the literature.

Maneuvering Target Tracking Algorithm Based on Muti-paramter Sequential Extended Kalman Filter

Based on the information theory,the performance of maneuvering target tracking can be improved by increasing the input information( observation vector).In this paper,the estimations of radial acceleration and radial velocity obtained in the signal processing are introduced into the measurement vector by coordinate transformation.In order to solve the problem of high nonlinearity of the radial acceleration,radial velocity and the state vector,a new algorithm of multi-parameter sequential extended Kalman filter( MSEKF) is proposed.The tracking performance of this algorithm is tested and compared with the other tracking algorithms.It is shown that the proposed algorithm outperforms these algorithms in strong and weak maneuvering environments.

How reliable is online diffusion of medical information targeting patients and families?

AIM: To determine whether online diffusion of the "Ten Warning Signs of Primary Immunodeficiency Diseases(PID)'' adheres to accepted scientific standards.METHODS: We analyzed how reproducible is online diffusion of a unique instrument, the "Ten Warning Signs of PID", created by the Jeffrey Modell Foundation(JMF),by Google-assisted searches among highly visited sites from professional, academic and scientific organizations;governmental agencies; and patient support/advocacy organizations. We examined the diffusion, consistency of use and adequate referencing of this instrument.Where applicable, variant versions of the instrument were examined for changes in factual content that would have practical impact on physicians or on patients and their families.RESULTS: Among the first 100 sites identified by Google search, 85 faithfully reproduced the JMF model, and correctly referenced to its source. By contrast, the other15 also referenced the JMF source but presented one or more changes in content relative to their purported model and therefore represent uncontrolled variants, of unknown origin. Discrepancies identified in the latter included changes in factual content of the original JMF list(C), as well as removal(R) and introduction(I) of novel signs(Table 2), all made without reference to any scientific publications that might account for the drastic changes in factual content. Factual changes include changes inthe number of infectious episodes considered necessary to raise suspicion of PID, as well as the inclusion of various medical conditions not mentioned in the original.Together, these changes will affect the way physicians use the instrument to consult or to inform patients,and the way patients and families think about the need for specialist consultation in view of a possible PID diagnosis.CONCLUSION: The retrieved adaptations and variants,which significantly depart from the original instrument,raise concerns about standards for scientific information provided online to physicians, patients and families.

China's Information Consultancy Services

China’s opening,reform and economicdevelopment,as well as the worldinformation technology revolution,hasenhanced China’s information consultancyservice.Before 1978,China’s economy wasa product economy governed by a highly-centralized planning system with economicinformation basically based on statisticscollected from lower levels and planningcommands to lower levels.The annual productexchange meetings sponsored by specialeconomic departments became the mainchannels for information exchange,soinformation services basically failed to meetneeds.In 1979,China’s economy began itstransfer from a planned to a market one。

Waveform Design for Cognitive Radar with Deterministic Extended Targets in the Presence of Clutter

Adjusting radar transmitted waveform to its environment is one of the most important roles in cognitive radar;having the capability of updating transmitted waveforms in different applications is a key point. It has been shown in many studies that if the waveform is designed according to the target and clutter characteristics, the detection performance will improve significantly. The uncertainty of the target radar signatures decreases via maximizing MI and the probability of extended target detection is increases via maximizing SNR. In this paper, a waveform design approach based on maximizing both SNR and MI and with regard to target and clutter shape is presented. The detection performance for proposed waveform is compared with previous proposed waveforms. The present paper compares different scenarios of target and clutter and using the probability of detection as a cost function to investigate the advantages and disadvantages of each waveform in different scenarios which are mainly discussed in this text. The desired waveform for cognitive radar is selected based on simultaneously making compromises between SNR and MI, which plays an important role in cognitive radar systems and based on the assumption addressed in the text, the best waveform transmitted into the environment.

基于B/S架构的远程会诊质控系统的设计与应用

目的研发远程会诊质控系统,在区域内实现远程会诊质控、管理、监管、考评、统计和持续改进的信息化。方法2020年,组建多学科团队,运用智力激励法和专题小组讨论法,基于B/S架构研发远程会诊质控系统,与既有远程会诊信息系统完全嵌合兼容,满足远程会诊全流程质量管理的功能需求。结果针对远程会诊质控工作要求,系统设计研发了质控管理、质控考评、实时监管、统计分析4个子模块,可满足远程会诊全流程质量管理的功能需求。结论该质控系统创新了远程会诊信息化质量管理模式,在区域内实现了远程会诊全流程的信息化管理,取得了较好的质量管理成效,有效促进区域内远程会诊工作的推进和发展。

信息交互理念下的建筑遗产保护与展示应用——以故宫养心殿东暖阁XR展陈项目为例

新信息技术的快速迭代与普及为遗产展陈带来全新的发展前景。扩展现实(XR)技术在建筑遗产展陈中的应用,为用户提供了“信息交互”的可能性,从而极大丰富了遗产本体面向公众传达的信息容量与获取方式。本文以明清官式建筑北京故宫养心殿东暖阁XR展陈开发项目为例,展示了如何利用XR技术中的虚拟现实(VR)和增强现实(AR)两种具体技术方案,实现针对建筑本体以及附加其上的多元历史文化信息的交互式展示。VR和AR技术方案在公众体验建筑遗产时提供了以建筑本体为索引探寻其背后丰富知识的交互接口,此外还可在未来进一步拓展至服务建筑遗产保护从业者,实现对建筑遗产管理、监测与修缮的支持。

全过程咨询模式下的信息共享影响因素研究

本文用SNA法(社会网络分析法)对全过程工程咨询模式下信息共享的影响因素进行研究。先在现有研究的基础上整理归纳出26个影响双方信息共享的因素,再通过问卷调查收集数据,借助SPSS软件将其归纳为环境、经济、风险、协同四类,然后通过Ucinet软件从宏观层面的网络密度、k-核指标分析和微观层面的度数中心度、中间中心度、接近中心度分析,最终确定了关键影响因素,对全过程工程咨询模式的推广与建筑业信息化发展有重要参考价值。

基于改进积分梯度的黑盒迁移攻击算法

对抗样本可以轻易攻击深度神经网络,影响模型的使用安全。虽然白盒攻击方法有优秀的成功率,但是在黑盒迁移攻击时通常表现出较差的效果。目前最先进的TAIG算法基于积分梯度,可以提升对抗样本的迁移性。但研究发现其积分路径缺失到饱和区的有效信息,并且使用不恰当的基线和梯度计算,限制了算法攻击成功率的上限。改进了积分梯度并提出了IIGA攻击算法(improved integrated gradients attack)。改进积分梯度将有限路径扩展为无限路径,融合输入到真实饱和区的梯度累计,可以表征每个分量更准确的重要性;并提出信息熵基线,确保基线相对于模型不含任何信息。IIGA将生成的改进积分梯度进行平滑处理作为攻击的反向优化方向,平滑操作过滤因神经网络在小范围偏导剧烈跳动而产生的大量噪点,使梯度信息集中于视觉特征,并在迭代过程中加入动量信息稳定梯度方向。在ImageNet数据集上进行的大量实验表明IIGA不仅在白盒攻击下优于FGSM、C&W等算法,在黑盒迁移攻击模式下也大大超过了SI-NI、VMI、AOA和TAIG等先进的算法。

基于移动医疗的新生儿护理线上咨询门诊的建立与实施

目的建立并实施新生儿护理线上咨询门诊,让群众得到“指尖上的医疗便利”,及时解决家长的育儿问题,识别疾病的风险。方法在医院微信公众号设立互联网医院之新生儿护理线上咨询门诊;选拔出诊护士、建立互联网专科护理服务制度、工作流程;监测互联网护理门诊工作量、接诊反应时长、服务时长和满意度。结果共选拔16名护士出诊,2020年2月—2023年8月新生儿护理线上咨询门诊共接诊9212例次,咨询条目145598次,足月儿8489人次(92.2%),早产儿723人次(7.8%),新生儿喂养咨询最多,为62799条(43.14%),新生儿黄疸咨询44778条(30.75%),皮肤问题咨询26297例次(18.06%),其他11724条(8.05%),判断需要转诊至线下护理或者医疗门诊者337人次(3.66%)。患者挂号到护士接诊的反应时长中位数为33(0,162)分钟。护士服务时长中位数为46(17,1440)min。进行了满意度评价的为6427人次(69.77%),其中服务质量、服务态度、系统使用3个维度均获得5星好评的为6362人次(98.99%)。结论开设新生儿护理线上咨询门诊可有效帮助家长足不出户解决育儿问题,满足新生儿延续性护理的需求,节约了家长就医时间,提升了家长就医体验感,也体现了新生儿专科护士的专业价值。