Control System Design and Validation for Visual Based Indoor Inspection Helicopter

This paper is on control system design for visual based indoor inspection by the model helicopters. For the indoor inspection system for large structures, there are some cases where it is difficult for htunans to work with. This paper introduces indoor inspection helicopter system with only inspection camera and prism for position sensing as payload. The control system is designed to help the operator of the inspection system to control the helicopter to designated position without much practice. The cases of the control by experienced and novice operators are compared and results show that the system has feasibility for indoor inspection system to be used by any kind of users.

Man-machine Relationship Analysis Based on Dashboard Similar Structure Design

Dashboard similar structure design is a kind of interactive design of ergonomics and industrial design, and also the consistency design of functional features and visual organization effect of dashboard. Functional feature design of dashboard is the analysis of man-machine interface, and visual organization effect design of dashboard is a branch of industrial design, both of them interact and unite.

Application of the Fuzzy Comprehensive Assessment Technique to Optimal Selection of Pipeline Design Alternative

s: Regarding the influencing factors in an optimal selection of pipeline design alternative as fuzzy variables with different weights, a fuzzy comprehensive assessment was applied to an optimal selection of the design alternative. Giving the Lanzhou-Chengdu pipeline as an example to explain the process, the result shows that this method is acceptable.

Key technologies and practice for gas field storage facility construction of complex geological conditions in China

In view of complex geological characteristics and alternating loading conditions associated with cyclic large amount of gas injection and withdrawal in underground gas storage(UGS) of China, a series of key gas storage construction technologies were established, mainly including UGS site selection and evaluation, key index design, well drilling and completion, surface engineering and operational risk warning and assessment, etc. The effect of field application was discussed and summarized. Firstly, trap dynamic sealing capacity evaluation technology for conversion of UGS from the fault depleted or partially depleted gas reservoirs. A key index design method mainly based on the effective gas storage capacity design for water flooded heterogeneous gas reservoirs was proposed. To effectively guide the engineering construction of UGS, the safe well drilling, high quality cementing and high pressure and large flow surface injection and production engineering optimization suitable for long-term alternate loading condition and ultra-deep and ultra-low temperature formation were developed. The core surface equipment like high pressure gas injection compressor can be manufactured by our own. Last, the full-system operational risk warning and assessment technology for UGS was set up. The above 5 key technologies have been utilized in site selection, development scheme design, engineering construction and annual operations of 6 UGS groups, e.g. the Hutubi UGS in Xinjiang. To date, designed main indexes are highly consistent with actural performance, the 6 UGS groups have the load capacity of over 7.5 billion cubic meters of working gas volume and all the storage facilities have been running efficiently and safely.

Bio-Oil Production by Pyrolysis of Oil Palm Empty Fruit Bunch in Nitrogen and Steam Atmospheres

This work investigated the bio-oil production from oil palm empty fruit bunch (EFB) by continuous pyrolysis reactor under nitrogen and steam atmospheres as sweeping gas. The study parameters were particle size, biomass feeding rate, reactor temperature, and reactor sweeping gas. The EFB particle ranges were below 500 micrometers, between 500 - 1180 micrometers and 1180 - 2230 micrometers. Feeding rates were 150, 350, and 550 rpm. Both factors were analyzed by single factor ANOVA. Additionally, Box-Behnken design was used to investigate temperature (350oC - 600oC) under the following nitrogen and steam flow rates as sweeping gas: 0, 100, and 200 cm3/min of nitrogen and 0, 9, and 18 cm3/min of steam. The mathematical model from Box-Behnken design succeeded in predicting the optimal conditions for normal and nitrogen atmospheres. A particle size below 1180 μm was determined to be optimal for bio-oil production. In a normal atmosphere or no sweeping gas, the condition was 475oC and 450 rpm of feed rate. The optimal condition for nitrogen atmosphere was 530oC, 450 rpm of feed rate, and 200 cm3/min of nitrogen flow rate. However, steam as sweeping gas caused high uncertainty and the model was unable to predict the optimal conditions accurately. The biooils from normal, nitrogen, steam, and mixed atmospheres were analyzed for general characteristics. NMR and GC-MS were used to analyze chemical compositions in the bio-oils. Relationships between physical and chemical characteristics were determined and discussed.

载人航天人机交互界面色彩设计方法研究

目的对载人航天人机交互界面的色彩设计方法流程进行了梳理和分析。方法遵循“以人为中心”的设计原则,从色彩空间与模型、色彩设计与人因、航天色彩设计范围、载人航天器色彩设计模型,以及载人航天器色彩设计与人因评价体系等方面,对载人航天器人机交互界面色彩设计方法流程体系进行了探讨。结果构建了载人航天色彩设计模型,阐述了完整的载人航天色彩设计方法流程体系。结论针对载人航天人机交互色彩设计方法的研究为航天员在轨环境中的生活品质及工作效能等相关领域的提高提供了有力支持,进一步增强了航天领域色彩设计与人因工程的重要性。

论我国可分离性标准的重塑

美国法中的可分离性标准是立法政策选择的结果,本质上是一项事实命题。我国司法实践中的可分离性标准借鉴自美国立法,但由于缺乏实体法依据,其被视为思想/表达二分法的自然推论加以适用,这决定了我国的可分离性标准在本质上有别于美国,是一项价值命题。司法实践对这一差异的忽视导致可分离性标准在我国的适用出现了判断困境、逻辑矛盾以及功能异化等问题。对此,应当明确可分离性标准的价值命题属性,并基于著作权法平衡激励创造与保留进入之要求,以公平和效率为价值取向重塑我国的可分离性标准。具体制度构建方面,将可分离性标准定位为权利范围的限定准则,根据实用艺术品艺术性表达部分的可替代程度之高低适用不同类别的保护模式。

肿瘤治疗电场在肿瘤治疗中的应用和机制研究进展

[背景]肿瘤治疗领域缺乏高效、安全的非侵入式治疗方法.近年来,肿瘤治疗电场(tumor treating fields,TTFields)作为一种新兴的非侵入性物理治疗技术,通过释放中频、低强度的交变电场有效抑制肿瘤生长,引发的副作用较小.[进展]目前TTFields已被广泛应用于各类肿瘤治疗的临床研究中,包括脑胶质瘤、间皮质瘤、非小细胞肺癌、胰腺癌、卵巢癌、肝癌及胃癌等.TTFields通过向生物分子施加生物物理力,扰乱肿瘤细胞的生物学功能从而抑制其生长,但具体分子机制尚不明确.为研究TTFields在肿瘤治疗中的分子机制,研究人员通过设计和搭建不同电极和交变电场发生平台,在体外研究TTFields对肿瘤细胞的作用机制.研究发现TTFields干扰细胞分裂、DNA修复、自噬、细胞迁移和细胞膜通透性等生物学过程,也影响血脑屏障、血管生成和肿瘤免疫等肿瘤微环境.[展望]本文回顾了近年来TTFields在肿瘤治疗中的应用、用于体外研究的电极设计和电场发生平台,及其潜在的抗肿瘤机制.然而,TTFields抑制肿瘤生长的分子机制仍需深入研究,评估其对能够自我更新的非肿瘤细胞和终端分化细胞的影响,以减少可能的副作用.这些研究将有助于提升TTFields的治疗潜力,为更多恶性肿瘤的治疗开辟新的可能性.

桃源漆艺木雕瑞兽模件化特征及设计应用研究

桃源漆艺木雕中瑞兽较多,但已有研究中未见缘由。通过文献查阅、比较研究发现“八蛮进宝”是其文化根源,在历史进程中瑞兽演化成为桃源典型的模件化装饰母题,其中具表情欢愉模件化造型特征的被普称为“欢兽”,以狮子、独角兽、麒麟为最。在提倡文化活态传承的背景下,以极具特色的欢兽头部为原型,以通用化、系列化、模块化“三化法”为设计原则,运用扁平化及解构设计方法,设计欢兽IP形象及其欢兽IP鬃毛、耳、五官构件,并通过材料转换、结构可变、功能可收纳的设计,实现用户自由创意欢兽造型的交互体验价值,以达到桃源漆艺木雕瑞兽文化在当代生活中活化的目的。

人机之爱可以取代人类爱情吗——兼论伴侣机器人的设计伦理

伴侣机器人的问世对人类现有的婚恋模式和情感模式造成了冲击。从亲密关系的视角来看,人机之爱与人类之爱存在本质的区别,因此,借助伴侣机器人实现恋爱或性生活的满足只是一种生理性的满足,它无法达到人类精神性满足的层次,故而是有缺陷的。由于伴侣机器人难以与人类建立类似于人类之爱的浪漫情感关系,完全顺从市场需求去设计伴侣机器人又可能引发性别不平等的问题,因此,如何设计符合伦理要求的伴侣机器人就成为一个关键性问题。鉴于此,伴侣机器人的设计伦理应考虑避免欺骗、防范性别不平等及防范社交隔绝等三个方面的问题。

虚拟现实技术赋能的《模具设计与制造》实证研究

通过实证分析探讨了虚拟现实技术在高职《模具设计与制造》课程教学中的应用及其对教学效果的影响。研究表明,虚拟现实技术的引入能够提高学生的学习兴趣,增强互动性和实践操作的真实感,有效提升学生的学习效率和技能掌握水平。研究也指出了虚拟现实技术在教学实践中存在的一些挑战和限制,如成本投入、技术配套和教师培训等问题。

满族面具图案模数化再设计研究

目的基于用户需求视角探讨满族面具图案的优化再设计,提高图案自身的时代性与功能性,使其更受新时代用户青睐,促进满族面具图案的活态发展与传承。方法首先,运用KANO模型对图案再设计的用户需求进行属性划分;其次,使用AHP(层次分析法)构建需求层次模型,计算各层级的权重系数及优先级排序,并结合需求属性进行设计策略分析;再次,根据设计策略,制定图案文化内涵、情绪价值以及造型特征属性的设计方案;最后,根据现存问题引入模数化方法,进行图案网格形态、特征线条、填充色彩的再设计实践及应用,以验证设计方案的可行性。结果运用KANO模型、AHP(层次分析法)以及模数化方法集成的再设计模型,得到一套更受用户喜欢的满族面具再设计图案作品。结论通过用户需求视角的策略分析与模数化方法的设计实践,进一步提高了满族面具图案再设计作品的用户认可度,为满族面具图案及相关传统图案的创新设计提供了思路参考。

基于眼动生理测量的高原工程机械显示交互认知负荷研究

目的探究工程机械驾驶员在平原和高原地区进行显示交互操作的认知负荷,并基于认知负荷对工程机械显示交互装置的不同功能模块进行评价,提出改进建议。方法设计并实施作业地区(高原和平原)×任务类型(4种功能模块)双因子混合实验,15名平原驾驶员和12名高原驾驶员分别在平原和高原工地进行了实车实验,采用眼动仪测量指标为注视点持续时间、瞳孔直径、瞳孔直径变化率及操作完成时间。结果方差分析的结果表明,作业地区和任务类型均会对眼动指标和操作时间产生显著性影响。高原的总操作时间为235.77±81.14 s,平原为170.62±28.72 s,平原与高原的瞳孔直径差值为-0.198(P<0.05),瞳孔直径变化率差值为-0.010(P<0.05)。结论高原环境会增加工程机械驾驶员进行显示交互操作的认知负荷。装载机显示屏的电机和电池模块的认知负荷较高,且在高原环境中这一影响更为显著,对此提出了通过简化、抽象化设计等方式进行改进的建议。

工学交替模式下纺织品设计专业人才培养研究

文章根据南疆地区特色纺织服装的发展,在纺织品设计专业人才培育中,结合地方区域发展的定位与优势,加强“艺工融合”。通过艺术创意、技术创新、工学交替模式,联合地方企业共同深化校企协作,探索创新机制下纺织品设计专业发展体系的构建方法与人才培养路径,深化人才培育课程,为促进学生能力提升及技能培育提供了新思路,实现以学生为中心的人才培养机制,达到专业育人育才的培育目标,为南疆区域经济发展提供有力的人才支撑。

Free return orbit design and characteristics analysis for manned lunar mission

A circumlunar free return orbit design model that satisfies manned lunar mission constraints is established. By combining analytical method with numerical method,a serial orbit design strategy from initial value design to precision solution is proposed. A simulation example is given,and the conclusion indicates that the method has excellent convergence performance and precision. According to a great deal of simulation results solved by the method,the free return orbit characters such as accessible moon orbit parameters,return orbit parameters,transfer delta velocity,etc. are analyzed,which can supply references to constitute manned lunar mission orbit scheme.

Point return orbit design and characteristics analysis for manned lunar mission

Point return orbit(PRO) of manned lunar mission is constrained by both lunar parking orbit and reentry corridor associated with reentry position.Besides,the fuel consumption and flight time should be economy.The patched conic equations which are adaptive to PRO are derived first,the PRO is modeled with fuel and time constraints based on the design variables of orbit parameters with clear physical meaning.After that,by combining analytical method with numerical method,a serial orbit design strategy from initial value design to precision solution is proposed.Simulation example indicates that the method has excellent convergence performance and precision.According to a great deal of simulation results by the method,the PRO characteristics such as Moon centered orbit parameters,Earth centered orbit parameters,transfer velocity change,etc.are analyzed,which can supply references to the manned lunar mission orbit scheme.

Hybrid uncertainty-based design optimization and its application to hybrid rocket motors for manned lunar landing

Design reliability and robustness are getting increasingly important for the general design of aerospace systems with many inherently uncertain design parameters.This paper presents a hybrid uncertainty-based design optimization（UDO） method developed from probability theory and interval theory.Most of the uncertain design parameters which have sufficient information or experimental data are classified as random variables using probability theory,while the others are defined as interval variables with interval theory.Then a hybrid uncertainty analysis method based on Monte Carlo simulation and Taylor series interval analysis is developed to obtain the uncertainty propagation from the design parameters to system responses.Three design optimization strategies,including deterministic design optimization（DDO）,probabilistic UDO and hybrid UDO,are applied to the conceptual design of a hybrid rocket motor（HRM） used as the ascent propulsion system in Apollo lunar module.By comparison,the hybrid UDO is a feasible method and can be effectively applied to the general design of aerospace systems.

Uncertainty analysis and probabilistic design optimization of hybrid rocket motors for manned lunar landing

To obtain a conceptual design for a hybrid rocket motor(HRM)to be used as the Ascent Propulsion System in the Apollo lunar module,the deterministic design optimization(DDO)method is applied to the HRM design.Based on the results of an uncertainty analysis of HRMs,an uncertainty-based design optimization(UDO)method is also adopted to improve the design reliability.The HRM design process,which is a multidisciplinary system,is analyzed,and a mathematical model for the system design is established to compute the motor performance from the input parameters,including the input variables and model parameters.The input parameter uncertainties are quantified,and a sensitivity analysis of the model parameter uncertainties is conducted to identify the most important model parameter uncertainties for HRMs.The DDO and probabilistic UDO methods are applied to conceptual designs for an HRM to be used as a substitute for the liquid rocket motor(LRM)of the Ascent Propulsion System.The conceptual design results show that HRMs have several advantages as an alternative to the LRM of the Ascent Propulsion System,including nontoxic propellant combination,small motor volume,and comparable functions,such as restarting and throating.Comparisons of the DDO and UDO results indicate that the UDO method achieves more robust and reliable optimal designs than the DDO method.The probabilistic UDO method can be used to develop better conceptual designs for HRMs.

多项式结构恒定束宽波束形成器的高效稀疏化设计

针对传声器阵列多项式结构波束形成器实现复杂度偏大的问题,提出了一种基于交替方向乘子法的多项式结构波束形成器稀疏化设计方法。该方法利用主瓣空间响应变化的优化准则以实现恒定束宽波束形成器设计,并通过将原始的高维非凸问题转化为并行求解的低维凸优化子问题,有效提高了多项式结构波束形成器的稀疏化效率。实验结果表明,与现有多项式结构波束形成器的稀疏化设计方法相比,所提方法在保持良好的设计鲁棒性的同时具备了更优的恒定束宽性能。在优化效率方面,所提方法耗时仅为现有方法的0.69%∼1.09%,并且获得了更高的抽头稀疏度。

旅游体验驱动下的新老年房车设计策略研究

提出新老年房车设计策略,提升新老年群体的房车旅游体验。首先分析新老年群体特征、需求以及旅游消费潜力,之后研究旅游体验的影响因素,然后基于马斯洛需求理论进行新老年房车旅游体验内容的构建,接着分析国内新老年房车的设计现状与趋势,最后通过分析总结,提出旅游体验驱动下的新老年房车设计策略:完善适老化和无障碍设计、关注旅途中的亲密关系、提升人与自然的接触体验、重视场景功能的拓展。