一种双边自行车停车装置的设计

针对共享单车停放困难影响交通秩序的现状,迫切需要研发自行车停车装置。设计了一种“摩天轮”式新型双边立式自行车停车装置,由机械执行机构和控制系统两大部分组成。前者通过大转矩步进电机和蜗轮蜗杆减速箱带动圆盘转动形成旋转执行机构,可提供6个自行车车位;后者利用32位闪存微控制器STM32系列单片机来处理停车装置运行过程中产生的数据,实现用户在存取自行车过程中6个车位顺畅地切换以及定位。该装置具有空间利用率高、存取简便快捷、美观防盗等特点,为解决共享单车的停放管理问题提供一种可参考的解决方案。     

Risk-involved stochastic performance of hydrogen storage based intelligent parking lots of electric vehicles using downside risk constraints method

Today, the utilizations of hydrogen storage systems (HSS), renewable generation units (PV and wind generation) and distributed energy units are increased in the intelligent parking lots (IPL) in order to charge the electric vehicles (EVs) with clean energy sources. In this work, the uncertainties of upstream grid price, the demand of IPL, wind speed, solar irradiation and temperature are modeled via scenario approach based on stochastic programing. Furthermore, the downside risk constraints method (DRCM) is applied to consider risk related to uncertainties to get risk-involved stochastic performance of hydrogen storage based intelligent parking lots of electric vehicles. The proposed risk-based formulation is modeled using mixed-integer linear programming (MIP) which is implemented under GAMS software and solved via CPLEX solver. Two cases namely risk-averse and risk-neutral strategies are studied and compared to show the effects of DRCM implementation. The obtained results demonstrate the expected performance cost (EPC) of IPL is slowly raised while risk-in-cost (RIC) is significantly reduced due to model of risk related to uncertainties.     

天津钢铁炼钢厂倒罐站600t无基坑不断轨钢轨塞入式轨道称重装置的实践

本文简单介绍了由我们公司制造的安装于天钢倒罐站的600t无基坑不断轨钢轨塞入式轨道称重装置,着重介绍了对该称重装置的隔热防护措施以及停车对位联锁。     

Changing Residential Land Use Regulations to Address High Housing Prices

Problem, research strategy, and findings: In the past 3 decades, a series of presidential administrations—and the APA—have recommended that cities update their zoning codes to enable more affordable and market-rate housing development. I identify 5 main categories of policy recommendations they have suggested and then assess Los Angeles’s (CA) zoning changes in these categories between 2000 and 2016. I answer 2 questions: First, what zoning changes did Los Angeles adopt to address housing affordability? Second, how were these changes initiated, and what were their scope and geographic extent? I find that Los Angeles made modest progress in the 5 policy categories. The city left its large-lot, single-family zoning mostly untouched, but it rezoned roughly 1,200 acres citywide to allow at least 50 housing units per acre, reduced parking requirements in some areas, made it easier to build accessory dwelling units, and adopted new incentives for affordable housing. Several policy changes resulted from new state laws, and Los Angeles voters approved new incentives for affordable housing near transit. Homeowner influence likely prevented the municipality from engaging in larger zoning reforms. I do not study the effects of Los Angeles’s regulatory changes on housing production and prices, but such research is an important next step. I also do not assess new regulations that counteracted the impact of the 5 categories of policy recommendations.

Takeaway for practice: This research suggests 2 lessons: 1) Planners should encourage state governments to preempt local zoning when it reduces affordable housing options and there is limited local political will for change, and 2) planners should identify feasible and effective zoning changes that would increase affordable housing given local considerations.     

居住区停车方式的选择

小汽车大量进入居住区已经成为趋势。由于国内尚未出台相应的停车规划导则，在实际建设项目中，对停车方式的选择有很大的随意性。本文在进行居民问卷调查和实例分析的基础上，从居民的主观需求和居住区用地等定额限制条件出发，提出根据“小汽车密度”选择停车方式，以及确定车库规模和服务半径的思路。并指出停车规划应有利于实现人车分流、提高居住区的整体环境质量。建议将有偿停车的部分费用，用于改善居住区环境，同时鼓励居民使用其它交通方式。     

浅谈住宅小区地下车库建设的利弊

我国以密集型多层或高层为主的住宅小区,随着私家车的日益增多,解决问题的办法大多是建地下车库。随之而来的问题是地下可能被“掏空”,而且地下建筑造价高、技术难度大,只为多建有限面积的地下空间,付出的代价可谓太多,地下工程的不可逆性又会给将来改造和土地再次利用带来困难。其他的选择是建机械式立体车库,政府主管部门制定相关政策限制小区内车位数量,鼓励兴建公共停车场,发展公共交通,更符合“以人为本”的指导思想。     

机械式停车方式在城市居住区中的运用

机械式停车方式具有明显的节地效应,特别在城市居住区小汽车停放场地不足的问题日趋突出的形势下,应予推广运用.在同其他停车方式比较的基础上,对机械式停车方式的优缺点进行了分析,并从经济投入、环境效益方面论述了机械式停车方式在居住区中运用的可能性.采用机械式停车有助于节约投资,提高环境质量.     

停车库火灾自动报警系统的设计

笔者根据自己的设计实践,阐述了停车库火灾自动报警及消防联动控制系统设计方面的思路和技术要求。     

地下车库污染物浓度的数值模拟

本文主要结合某地下车库通风系统某一天的实测数据，根据地下车库室内环境的特殊性建立数学模型，介绍采用计算流体力学软件Fluent对地下车库通风时的气流组织作数值模拟，对CO浓度场作进一步的模拟计算，并和实测数据进行对比，发现数值模拟所得结果和该地下车库的实测数据较为吻合，从而说明本文提出的用CFD方法来模拟地下车库空间内污染物平均浓度的正确性，为预测地下车库空间内污染物平均浓度，实现通风系统的实时控制提供了一种较为简便、形象的方法。     

浅论人防工程规划编制的难点、工作要点和特点——以《湛江市人防工程规划》编制为例

随着机动车数量的迅猛增加，大中城市停车难的问题日益突出，直接原因是停车泊位的供应不能有效满足需求。应当从系统整体出发，建立规划先导，政策法规配套、体制健全、管理严明、技术先进的停车场规划建设管理体系，全面推进停车场规划建设管理，实现适度的停车供需平衡，促进城市交通的可持续发展。