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关键词： 网络设备   网络设备  

ISBN: (纸本)9787568298063

摘要： 本书依托交换机、路由器和防火墙完成设备认知、部门网络、公司网络、公共网络、防火墙和局域网的搭建与使用。主要讲解了网络设备的管理和控制方式；部门网络主要讲解单VLAN、多VLAN通信以及MAC与端口绑定；公司网络主要讲解了端口聚合、生成树、多实例生成树、DHCP、SSH、ACL、静态路由等。

关键词： Adaptation   Aquaculture   Climate change impacts   Fisheries management area (FMA)   Milkfish   Small-pelagic   Value chain   Vulnerability assessment  

摘要： Climate change impacts on the fisheries can be short-term or long-term, making them highly vulnerable. Fishers' vulnerability encompasses several factors and includes, among others, their sensitivity, exposure to the elements, and their adaptive capacity. The main aim of this study was to help develop a vulnerability assessment tool that can be applied in the various nodes of the fisheries and aquaculture value chains with a long-term view of enhancing the resilience of the fisheries and helping increase the adaptive capacity of the fishing communities. A participatory technique using online workshops was conducted together with various stakeholders (N = 214) who gave insights and suggested indicators that drive climate change impacts and vulnerability. Based on the online workshops conducted, the common hazards/drivers were increasing temperature, typhoons, flooding (sealevel rise), and the recent pandemic, which consequently destroy coral reef ecosystems, affect fisheries yield, increases fish mortality, damage boats, fishing gears, pens, cages, pond dikes, erode beach properties, and devastate houses. In association with these impacts, mobility, travel, processing, and logistic operations are severely reduced. In the human dimension, the fishers and fish farmers are directly affected in terms of income loss, destroyed fishing gears, nutritional deficiencies and health impacts, less fishing operations, early or reduced harvest yield, and low market value of products. In the adaptation options, the infrastructure, social, economic, awareness/knowledge, and relevant governance/policy dimensions are needed to address and help mitigate various climate change impacts.

关键词： Three-dimensional ecological footprint model   Local parameter   National hectare   Urumqi city   China  

摘要： Natural capital is essential for human survival, continuation of modern civilization, and realization of sustainable development goals. Therefore a scientific framework is required for evaluating regional natural capital consumption and its capacity for ensuring sustainable development. Regional sustainability assessment can be conducted by applying the ecological footprint theory and modeling methods. However, traditional models focus on the production function of land, while disregarding the versatility of ecosystems and therefore cannot demonstrate the supply-demand relationship and their balance for ecological footprint based on the flows of ecosystem services. In this study, an ecological footprint model based on ecosystem service values was developed and used to measure the ecological footprint and carrying capacity of Urumqi city in China during 1995-2018. Subsequently, the partial least squares method was used to identify the factors driving the changes in the ecological footprint depth of Urumqi. The results showed that: (1) the equivalence factors of Urumqi were relatively stable, in the following order: water area (7.81) > forest land (2.08) > grassland (0.67) > cultivated land (0.35). The yield factors varied highly, in the following order: cultivated land (1.08) > forest land (0.78) > water area (0.76) > grassland (0.72). (2) During 1995-2018, the per capita ecological footprint increased by 2.83 times, ecological carrying capacity decreased by 34.74%, and ecological deficits increased by 15.76 times. Moreover, the energy land-use contribution to the deficits was larger than that of other land categories owing to its high proportion and rapid growth. (3) Within 24 years, the ecological footprint of Urumqi increased in size and depth by 1.78 and 2.45 times, respectively. Therefore, Urumqi requires approximately quadruple the current land area to meet the residents' resource consumption demands under sustainable development. (4) The three extremely import

关键词： BASIC语言  

ISBN: (纸本)9787122397829

摘要： 本书由浅入深，力求使读者能够快速掌握Gambas脚本设计、通信与安全、信号处理以及相关工程应用方法。全书共分为9章，包括脚本程序设计、网络通信、压缩与加密、外部接口、虚拟仪器、信号处理、数据采集以及软件无线电应用等内容。

关键词： Asset management   wastewater facilities   blower pumps   replacement   condition monitoring  

摘要： Optimal management is usually at the top of the concerns in the context of water infrastructures. In the specific domain of wastewater treatment plants (WWTPs), European Directive 91/271 established the need of implementing a biological treatment of wastewater leading to an intensive construction of WWTPs in several European countries, which now present important problems of maintenance. These facilities are composed of different types of assets, which should be managed efficiently in order to optimize the performance of the processes as well as the maintenance and replacement costs of the equipment. In fact, the deterioration of these assets increases the operational risk and endangers the continuity of the service of these WWTPs. In this paper, the authors combine multicriteria methodologies (MCDM) and economic aspects of the equipment to define an appropriate technical-economical replacement policy. With the aim of developing a reference procedure in the wastewater sector, an approach has been made to blower pump, which is an equipment widely used in WWTPs to provide a continuous air flow to the reactor facilitating the elimination of organic matter and the nutrients contained in the wastewater. The proposal integrates aspects such as acquisition costs and corrective maintenance, interest rate, and amortization based on the condition of the equipment.

关键词： Digitalization   Safety   Occupational risk   Accident risk   In-house logistics   Situation awareness  

摘要： Forklift drivers in in-house logistics are at a high risk of occupational injuries. This study piloted a video-based learning game for forklift drivers, designed to increase their safety awareness in their highly dynamic operating environment. The game consisted of video clips filmed from the driver's perspective. Each video clip was stopped and masked at a point where a safety-relevant item or hazard appeared. Two locations were marked on the screen, one with the hazard and the other with no hazard. The players had to choose the location with the hazard while the screen was masked and received feedback on their choice. Eighty-one professional forklift drivers played the game at their workplaces during the 3-4 month intervention. In addition, forklift registered hard shocks were recorded and compared to the game performance of 20 participants. Higher accuracy in the game correlated with a lower shock rate, suggesting that real-world forklift driving skills transferred to the game. However, accuracy improvement in the game did not decrease the vehicle registered hard shocks. During the intervention, 40% of the participants reported that they began to pay more attention to the hazards of their work environment. Overall, the results suggest that a gamified approach could be useful for demonstrating safety-relevant features at the workplace and supporting drivers' safety-related self-reflection.

关键词： NeoEndo   retreatment system   WaveOne  

摘要： Background: Teeth with apical periodontitis that either persisted or developed after initial root canal treatment is most often indicated for retreatment procedure. The present study was conducted to compare the WaveOne and NeoEndo retreatment file system for the removal of gutta-percha from the root canal. Materials and Methods: Fifty extracted mandibular first premolars with single straight roots were divided into two groups, Group I-WaveOne and Group II-NeoEndo. All samples were scanned with cone-beam computed tomography after the root filling and retreatment procedures. The decrease in the volume of filling material after each retreatment protocol was measured. Results: The mean volume of gutta-percha in Group I before retreatment was 5.6 and in Group II was 5.3, after retreatment in Group I was 2.7, and in Group II was 4.2. The mean percentage reduction in Group I was 45.2% and in Group II was 23.8%. The difference was significant (P < 0.05). Conclusion: Both systems failed to completely remove gutta-percha. WaveOne was significantly more effective than the NeoEndo retreatment system.

关键词： One Shape (R)   single file system   single-visit endodontics   Wave One (R)  

摘要： Background: Wave One (R) (WO) and One Shape (R) (OS) are among the common endodontic file systems having rotary and reciprocating movement of instrument, respectively. The study evaluated the postoperative pain after single-visit root canal treatment using single file rotary and reciprocating system. Materials and Methods: The present study was conducted in the department of conservative dentistry and endodontics on 68 teeth of patients aged between 20 and 45 years. Sixty-eight teeth were divided into two study groups. In Group A, instrumentation with OS file systems (n = 34) was done with subgroup A1 having patients without periapical lesion (n = 17) and subgroup A2 having patients with periapical lesion (n = 17). In Group B, instrumentation with WO file systems (n = 34) was done with subgroup B1 having patients without periapical lesion (n = 17) and subgroup B2 having patients with periapical lesion (n = 17). The root canal shaping procedures were performed according to the manufacturer's instructions for each instrument system. Presence of postobturation pain was accessed by visual analog scale (VAS) scale (0-10), where 0 showed no pain, 1-3 mild pain, 4-6 moderate pain, 7-9 severe pain, and 10 worst possible pain. Results: The intensity of pain was measured with VAS score in patients without periapical lesions and with periapical lesions using WO and OS file system on the 1st, 2nd, 3rd, and 7th day. VAS score was found to be nonsignificant on the 1st, 2nd, 3rd, and 7th day in both groups (P > 0.05). Intergroup comparison of VAS score was found to be nonsignificant (P > 0.05). Conclusion: Both systems were found to have similar effect with respect to postoperative pain. However, WO single file system presented less pain as compared to OS system in cases with periapical lesion. Large sample studies are required to substantiate the result obtained in this study.

关键词： 设备管理  

ISBN: (纸本)9787122392961

摘要： 本书针对设备管理人员在企业所面临的新和重要的设备问题, 介绍了设备管理的基本理论、管理方法和管理工具 ; 另外, 书中还提供了很多国内外公司的先进设备管理的具体做法和成功经验。全书共12章, 内容包括: 生产运作与流程管理, 现场管理的基本工具与方法, 设备管理概述, 设备资产管理, 设备的前期管理, 设备的使用和维护管理, 设备的润滑管理, 设备技术状态管理, 设备维修管理, 备件管理, 设备法兰管理, 设备更新改造管理, 设备全员生产维护管理 (TPM) , 设备管理的信息化、网络化和电子化。每章末均附有思考与练习题及技能实训与实践项目, 以便加深读者对设备管理基本知识、方法、技巧的理解与运用。

关键词： Accident prevention   Police   Vehicle   Technology acceptance model  

摘要： Few studies have examined the impact of advanced driver-assistance systems (ADAS) on police officers to improve driver safety and prevent crashes. This is in spite of police officers having higher driving-related mortality rates than average civilians. To fill this gap, a survey study was conducted on 73 police officers to assess their opinions on various ADAS features as well as their recommendations for improvement. Results of the correlation analyses indicated that officer behavior and opinion on ADAS features were influenced by the trust officers had in the available ADAS systems among other key factors such as ADAS training and perceived usefulness. On this basis, guidelines for future research and development of ADAS were provided to improve officer driving safety in police operations. The guidelines need to be further validated in future driving simulation or naturalistic studies.