Mechanism and technology study of collaborative support with long and short bolts in large-deformation roadways

Common short bolts of equal length are widely used to support the roofs of roadways in coal mines.However, they are insufficient to keep the roof stable against large deformations, so docking long bolts with high levels of elongation that can adapt to large deformations of the surrounding rock have been adopted. This paper proposes a collaborative support method that uses long and short bolts. In this study,the mechanism of docking long bolts and collaborative support was studied. Numerical simulation, similarity simulation, and field testing were used to analyze the distribution law of the displacement, stress,and plastic failure in the surrounding rock under different support schemes. Compared with the equal-length short bolt support, the collaborative support changed the maximum principal stress of the shallow roof from tensile stress to compressive stress, and the minimum principal stress of the roof significantly increased. The stress concentration degree of the anchorage zone clearly increased. The deformation of the roof and the two sides was greatly reduced, and the subsidence shape of the shallow roof changed from serrated to a smooth curve. The roof integrity was enhanced, and the roof moved down as a whole. Plastic failure significantly decreased, and the plastic zone of the roof was within the anchorage range. The similarity simulation results showed that, under the maximum mining stress,the roof collapsed with the equal-length short bolt support but remained stable with the collaborative support. The collaborative support method was successfully applied in the field and clearly improved the stability of the surrounding rock for a large deformation roadway.

XML-based Data Processing in Network Supported Collaborative Design

In the course of network supported collaborative design, the data processing plays a very vital role. Much effort has been spent in this area, and many kinds of approaches have been proposed. Based on the correlative materials, this paper presents extensible markup language （XML） based strategy for several important problems of data processing in network supported collaborative design, such as the representation of standard for the exchange of product model data （STEP） with XML in the product information expression and the management of XML documents using relational database. The paper gives a detailed exposition on how to clarify the mapping between XML structure and the relationship database structure and how XML-QL queries can be translated into structured query language （SQL） queries. Finally, the structure of data processing system based on XML is presented.

Experience of Mental Health Professionals Collaborating with Peer Supporters in a Community Mental Health Service Team

This study explored how mental health professionals collaborate with peer supporters with mental disabilities in a community mental health institution.From January 19 to February 23,2021,three 60 min interviews were conducted with six mental health professionals working at a Korean community center.The results were qualitatively analyzed and divided into four themes and eight categories.The four themes were the perceptions of and challenges in working with peer supporters with mental disabilities,conflict and confusion about working with peer supporters,forming partnerships with peer supporters,and policy support for peer supporters’job security.Participants reported vague anxiety about working with a peer supporter and difficulties with the trial-and-error process of adjusting to the role as challenging.Over time,however,they realized that they needed to make an effort to develop meaningful relationships with peer supporters and mental health professionals.Thus,through this study,we realized that there was a need to improve the system,such as building infrastructure for job stability for peer support workers and capacity building tailored to the mental disorders.Although peer supporters play various roles while working with mental health professionals,this study showed the possibility of mutual growth through communication and cooperation.These findings will help prepare systems necessary for collaboration between the two teams amidst the increasing institutionalization of peer support for mental disorders.

SVM-DT-Based Adaptive and Collaborative Intrusion Detection

As a primary defense technique, intrusion detection becomes more and more significant since the security of the networks is one of the most critical issues in the world. We present an adaptive collaboration intrusion detection method to improve the safety of a network. A self-adaptive and collaborative intrusion detection model is built by applying the Environmentsclasses, agents, roles, groups, and objects(E-CARGO) model. The objects, roles, agents, and groups are designed by using decision trees(DTs) and support vector machines(SVMs), and adaptive scheduling mechanisms are set up. The KDD CUP 1999 data set is used to verify the effectiveness of the method. The experimental results demonstrate the feasibility and efficiency of the proposed collaborative and adaptive intrusion detection method. Also, the proposed method is shown to be more predominant than the methods that use a set of single type support vector machine(SVM) in terms of detection precision rate and recall rate.

Electromechanical instrument collaborative sharing system based on A/S mode

In this paper, we put forward a collaborative mode based on A/S mode to solve existing problems in the process of developing electromechanical instrument collaborative sharing system (EICSS). The mode architecture, working pattern and development flow of this system were described. The prototype system developed was applied to Lambda 900 Spectrometer in Chongqing University to realize electromechanical instrument networked sharing, and demonstrated desirable expansibility and felxibility to satisfy diverse demands of customers.

A NEW APPROACH TO THE DESIGN OF A SYSTEM FOR FEATURE EXTRACTION BASED ON HUMAN-COMPUTER COLLABORATIVE TACTIC

We are involved in an embarrassing situation that the limited capability of automated feature extraction in digital photogrammetric systems cannot satisfy the increasing needs for rapid acquisition of semantic information for applications. Facing this challenge, a new tactic, Human-Computer Collaborative (HCC) tactic, and a corresponding new method, Operator-Object Directed (OOD) method, are proposed for the design of a system for feature extraction from large scale aerial images. We hold that in almost all technical complex systems, full automation will be neither technically feasible nor socially acceptable. The system should be designed to optimize through the cooperative operation with two agents in the system: the hurtan and the computer.

Corroborative Activities and Recognition Between Community Comprehensive Care Unit’s Nurses and Care Managers in Supporting Discharge of Elderly from Hospital - A Secondary Publication

Objective: The purpose of this study was to clarify the collaborative activities and mutual recognition between community comprehensive care unit nurses (Ns) and care managers (CM) in supporting the discharge of the elderly from the hospital. Methods: A total of 300 nurses working in community comprehensive care wards and 360 care managers working in B City in A Prefecture were surveyed using an anonymous self-administered questionnaire. Results: The highest percentage of responses regarding necessary collaborative activities with multiple professions in supporting hospital discharge were the same for Ns and CMs. The items regarding practice with the highest percentages were “relationship as a team” for Ns, and “user-centered awareness” for CM. While these professionals were willing to share information about their patients’ lives after discharge, the percentage of those explaining their expertise was low. It is thought that collaborative activities focusing on these aspects would lead to more appropriate discharge support.

Multi-Dimension Support Vector Machine Based Crowd Detection and Localisation Framework for Varying Video Sequences

In this paper, we propose a novel method for anomalous crowd behaviour detection and localization with divergent centers in intelligent video sequence through multiple SVM (support vector machines) based appearance model. In multi-dimension SVM crowd detection, many features are available to track the object robustly with three main features which include 1) identification of an object by gray scale value, 2) histogram of oriented gradients (HOG) and 3) local binary pattern (LBP). We propose two more powerful features namely gray level co-occurrence matrix (GLCM) and Gaber feature for more accurate and authenticate tracking result. To combine and process the corresponding SVMs obtained from each features, a new collaborative strategy is developed on the basis of the confidence distribution of the video samples which are weighted by entropy method. We have adopted subspace evolution strategy for reconstructing the image of the object by constructing an update model. Also, we determine reconstruction error from the samples and again automatically build an update model for the target which is tracked in the video sequences. Considering the movement of the targeted object, occlusion problem is considered and overcome by constructing a collaborative model from that of appearance model and update model. Also if update model is of discriminative model type, binary classification problem is taken into account and overcome by collaborative model. We run the multi-view SVM tracking method in real time with subspace evolution strategy to track and detect the moving objects in the crowded scene accurately. As shown in the result part, our method also overcomes the occlusion problem that occurs frequently while objects under rotation and illumination change due to different environmental conditions.

软弱围岩掘锚一体化快速掘进关键技术与工程实践

软弱围岩掘锚一体化快速掘进关键技术与装备是煤矿安全高效开采以及智能化建设的迫切需求。以具备膨胀性、节理化等软岩特征的煤矿回采巷道工程为背景,梳理了国内外掘锚一体机快速掘进技术发展现状,剖析了软弱围岩条件下掘锚一体机快速掘进面临3个方面的难题,包括全宽截割对围岩的扰动控制,软弱围岩及时高效永久支护,软弱围岩快速掘进煤帮临时支护。提出了软弱围岩掘锚一体化快速掘进的5项关键技术,包括:(1)低扰动截割技术。主要包括椭型全宽截割滚筒、截齿排布优化、截割动力学优化等。(2)减小空顶空帮距的及时支护技术。该技术是在掘锚一体化技术基础上,研制了集双圆柱导向、多连杆升降、支护油缸撑顶撑底、随动挡矸帘防护于一体的多钻机整体滑移平台,将掘锚一体机作业空顶距由2.5 m降至1 m,作业空帮距由3.5 m降至1 m。(3)软弱围岩多维度协同支护技术。综合考虑锚杆锚索支护参数间的时空协同效应和支护体与围岩的协同效应,掘进工作面采用低密度强力锚杆支护控制顶板,后部同步实施增强永久支护。(4)钻锚一体化技术。主要包括锚杆结构和力学特性、锚固剂材料及泵注技术等。(5)煤帮喷涂临时支护技术。主要包括快反应高延伸率喷涂材料、高比例精度喷涂泵送、不规则煤壁表面自适应轨迹控制、矿用防爆高精度机械臂、喷涂材料配套补给等。基于以上内容,研制了可控作业空顶距掘锚一体机,并进行了井下试验。试验表明,该装备有效缩短了作业空顶距和空帮距,实现了作业空顶距“可控”,适应于软弱围岩巷道快速掘进,掘进效率提高了1倍。

职业教育赋能县域城乡融合发展:逻辑理路、现实梗阻与实践路向

职业教育与县域城乡融合发展以人的全面发展为共同逻辑基点,职业教育依托技能人才培养、科教融汇发展、公共服务供给、教化育人实践和开放合作办学等赋能县域城乡要素流动、产业融合、社会公平、文化交融与治理协同。在加快构建新发展格局的时代背景下,发挥职业教育在县域城乡融合发展中的赋能作用,需要聚焦当前职业教育在人才培养、科技创新、资源配置、文化传播、开放合作领域的现实梗阻,以育人体系完善、科教融汇深化、资源配置优化、文化场域构建、开放格局打造为路向,推动县域城乡人才、产业、服务、文化和治理的多维融合。

基于协同降噪与IGWO-SVR的高填方路基沉降预测

高填方路基沉降影响山岭重丘区重载铁路运营安全。为克服实测沉降数据掺杂随机噪声、现有预测模型适用性差的不足,提出基于协同降噪算法与IGWO-SVR模型的沉降预测方法。运用互补集合经验模态分解法(CEEMD)与小波包变换法(WPT)对含噪沉降数据进行协同降噪处理;提出基于佳点集初始化均布、非线性收敛控制与自身历史最优记忆位置更新的改进灰狼优化(IGWO)算法,并结合支持向量回归模型(SVR),构建IGWO-SVR沉降预测模型。进一步地,利用大准铁路工点及现有文献研究成果,验证IGWO-SVR模型的优越性。结果表明:协同降噪法可有效消除原数据中噪声项的干扰波动;在小样本数据集上,IGWO-SVR模型较传统沉降预测模型与现有文献所述预测模型,具有更高的预测精度与稳定性。研究成果为重载铁路高填方路基沉降预测提供了新途径。

信息资源管理学科的区域战略支撑与协同发展——2023年第一届西北高校信息资源管理学科建设联盟工作会议暨2023年学术年会纪要

2023年12月1-3日,第一届西北高校信息资源管理学科建设联盟工作会议暨2023年学术年会在陕西西安顺利召开,信息资源管理领域的200多位学者、研究人员参加了会议。本次会议以“信息资源管理学科的区域战略支撑与区域协同发展”为主题,设置了主旨报告、高端对谈、分论坛报告等环节,与会学者共话学科区域合作发展与服务创新实践,共谋信息资源管理学科高质量发展。

家庭教育指导需求与社区支持现状——基于对上海1000名家长的调查

如何提高社区的家庭教育支持能力,是上海构建完善学校、家庭、社会协同育人体系的关键。基于对1000名育有未成年子女的上海家长的问卷调查发现,家长普遍面临家庭教育问题,对家庭教育指导的需求度较高;家长对家庭教育指导的需求呈现个性化、多元化特征;家庭特征的复杂性、特殊性极大地增加了家庭教育的指导难度。目前上海的社区在支持家庭教育方面的设施和场所多元化,服务内容丰富,平台作用彰显,不足之处主要在于家庭教育支持设施和场所的知晓度不高、指导服务的有效性不足以及缺乏对家长的心理支持等方面。未来,上海可通过加强线上线下宣传、探索服务模式、搭建互助平台等措施来进一步推动社区支持家庭教育工作的开展。

地方应用型高校实践教学体系的创新路径——以通信工程专业为例

通信工程专业在信息社会扮演着关键角色,但在地方应用型高校面临着新挑战。文中以邯郸学院通信工程专业为例,以工程教育认证为背景,探索了实现实践教学创新的策略。在剖析传统实践教学体系的挑战后,提出了一系列创新方案,旨在将通信工程专业实践教学与实际需求、行业标准、科研紧密相结合,培养学生的全面专业素养和实际应用能力。通过实际项目、跨学科课程、校企合作、科研助力等多方面的创新,为通信工程专业实践教学提供了可行的策略。这一研究对其他地方的应用型高校通信工程专业教学改革具有借鉴意义。

煤巷钻锚一体化快速掘进技术与装备及应用

分析煤巷掘进技术与装备现状及存在的问题,介绍研发的钻锚一体化快速掘进新模式、新技术、新装备及井下应用效果。研发出钻锚一体化锚杆支护技术与设备,包括钻锚一体化锚杆、泵注式锚固剂、钻锚一体化钻臂、钻箱、锚杆仓、锚固剂泵注系统及智能控制系统,将传统树脂锚固锚杆安装6道工序简化为1道连续工序,实现了锚杆自动化“一键”打设,单根锚杆作业时间由原来5~6 min减少为3 min。研发出自动化喷涂支护技术与装备,包括高强、速凝、抗变形喷涂护表材料,抗拉强度超过9 MPa,断裂伸长率超过100%,黏结强度高于3 MPa;研发出6自由度喷涂系统,可实现随掘自动化快速喷涂作业。研发出巷道随掘变形动态监测技术与系统,实现随掘大粉尘、多干扰、低照度环境下的巷道表面变形监测,监测精度能够满足围岩稳定性评价要求。提出煤巷掘支锚运分区并行协同快速掘进新模式,研制出钻锚一体化快速掘进成套装备。对试验矿井陕西陕煤曹家滩煤矿回采巷道掘进过程中围岩位移和稳定性进行了监测,在时间上,巷道掘出2~3 h后80%以上的围岩位移已经发生;在空间上,距离掘进工作面相当于2倍巷道宽度的位置,90%以上的围岩位移已经完成。快速掘进引起的巷道围岩位移在很短时间内就基本完成,要求支护必须及时且快速。在曹家滩煤矿10 m超大采高综采工作面特大断面回采巷道完成近6000 m的巷道掘进工程,打设钻锚一体化锚杆60000余根。锚杆施工时间、支护用工人数及作业人员劳动强度大幅降低,掘进速度、效率及自动化水平显著提高。试验巷道顶板位移量小、完整稳定,支护效果良好。煤巷钻锚一体化快速掘进技术与装备井下试验取得成功,具备了特大断面煤巷月掘进进尺1500~2000 m的能力。

煤层群采动下围岩应力演化规律及协同控制技术研究

针对煤层群开采过程中巷道支护困难问题,以贵州土城矿212回风石门为工程背景。综合采用现场调研、数值模拟、相似模拟及现场试验等手段,揭示了212回风石门应力演化规律,并提出了“卸−转−固”协同控制技术。研究结果表明:212回风石门遭受破坏的主要原因是煤层群采动过程中存在的地质力学问题导致了围岩失稳。巷道底板及两帮在采动过程中产生不同程度的应力集中。当遭受垂直应力挤压时,巷道底部承受的挤压力较大,而顶部围岩承受的拉伸力较大,由于力学不平衡导致围岩的破坏。基于此提出了“卸−转−固”协同控制技术。通过爆破卸压的方式,利用爆破产生的冲击波引起围岩的震动和应力波动,使表层围岩中原本集中的应力分散到更深的围岩区域,降低表层围岩的应力集中程度。同时,利用爆轰和封孔工艺进一步加固卸压孔周围的围岩,形成两个承载结构。即由巷道支护体形成的内承载体和由深部围岩形成的外承载体。两者相互作用有效承受巷道浅部及深部围岩的应力,并转移到支护结构,起到保护和稳定围岩的作用。利用该技术在212回风石门现场试验,结果显示:使用该技术区域应力长期趋于稳定甚至缓慢降低,巷道顶底板及两帮移近速率分别降低了74.49%及47.67%,底鼓量降低了77.2%。而未使用该技术区域应力出现不同程度的上升,表面位移收敛严重。由此可得,围岩控制效果显著。该技术已成功推广到贵州其他不同地质环境的煤矿,均取得了显著效果。

府际财政应急援助的嵌入式协同治理机制构建

对口支援作为中国特色的府际财政应急援助机制,是突发事件下府际财政协同治理的重要实践形式。然而,“动员式协同”的府际财政应急援助实践在权责划分以及利益激励等方面还存在一些问题,亟需纳入法治化轨道。嵌入理论为府际财政应急援助提供了更优的模式选择,“嵌入式协同”的府际财政应急援助治理模式在组织形态、制度基础和动力因素方面有其优势,有利于实现纵向上政府由“主导”到“引导”的转型,横向上政府由“被动”到“主动”的转变,构建应急财政权力的新型配置格局。应当基于“结构嵌入(纵向引导与横向协作的有机结合)—规则嵌入(法律体系与互助协议的联合规制)—动力嵌入(权责划分与利益补偿的有效衔接)”的框架构建其相应机制。

应急处置决策需求下的档案数据管理理论研究

应急处置决策需要依赖于准确、完整的档案数据支持。本文从应急处置决策的需求出发,探讨了档案数据管理的理论体系与方法,重点分析了应急处置中档案数据的特征和关键作用。通过结合档案数据管理的全生命周期理论,提出了从数据的收集、处理、存储到利用的系统化管理框架,确保档案数据在整个生命周期内的有效性和可用性。同时,文章还讨论了多元共建共享机制在档案数据管理中的应用,论证了跨部门、跨领域协作在应急决策中的必要性、理论机理和实现路径,为提升应急处置决策的效率和精确度提供系统的档案数据管理方法支持。

锚杆及钢带协同作用下的岩块力学特性试验研究

为研究钢带及锚杆对锚固体的作用机理,利用RMT-150C岩石力学试验加载系统,进行了端锚与全锚加钢带和不加钢带试件的单轴加载对比试验,比较了锚固方式和支护密度对试件的锚固效果。研究结果表明,全锚锚杆在提高试件强度方面比端锚锚杆效果更强。安装钢带的试件的峰值强度总体较未加装钢带的试件得到较大提升,但随着锚杆数量的增多,这种提升效果逐渐减弱;此外,钢带对全锚试件的提升效果优于端锚试件。安装钢带的试件在抗压强度和侧向抗拉强度方面均有所提升。锚杆的支护密度应与试件大小相适应,过密的支护密度同样会弱化试件强度。

新上海一号煤矿软岩回采巷道预裂卸压技术研究

基于新上海一号煤矿软岩巷道支护薄弱的特点,提出了一种新的预裂卸压技术,旨在解决软岩巷道围岩大变形控制难题。该技术主要采用超前预裂卸压为主、NPR锚索协同支护为辅的方式,通过预裂卸压切断采空区顶板与巷道顶板之间的联系,加速顶板垮断,减小悬臂长度及传递至临空巷道顶板的覆岩荷载。同时,采用NPR锚索提前对巷道进行补强加固,确保了沿空巷道在超前应力影响下的稳定性。实地应用表明,采用预裂卸压技术回采巷道围岩变形量得到有效控制,验证了预裂卸压技术的有效性。为软岩巷道稳定性控制提供了一种新的解决方案。