The Disneyland fireworks show is a spectacle.Yet it is nothing, compared to the holiday fun in Beijing’s suburbs that is only a memory now. The Chinese people, inventors of fireworks, are masters at lighting up the sky. It was hard to imagine the Spring Festival being celebrated without all the ear-splitting bangs and bedazzling blazes.
如图2及表2所示，增加电磁场以后激光焊接接头拉伸强度与未加磁场接头变化不大，均高于标准拉伸强度要求；增加电磁场焊接接头熔深明显增加，熔宽明显减小，表明增加电磁场后焊缝热影响区更小，具有更好的接头形状，并有较小的变形趋势。
The ritual continued every Lunar New Year in cities and villages. People took it for granted though it could lead to casualties. In densely populated downtown areas, deadly injuries and damage to properties were rampant during the holiday season. In Beijing,medical staff and firemen across the city stayed alert all night long. In 1993, the majority of residents agreed that the fireworks constituted a public hazard,and the municipal government banned them inside the Fifth Ring Road.
Still, fireworks sold briskly in the capital. After the lavish festival-eve dinner, many Beijingers would drive outside the Fifth Ring Road. Opening their car trunks,they would gently carry boxes of fireworks out and put them in a row. The boxes were often as big as microwave ovens and seemed heavy from the way they were handled. They came in bright colored packaging with auspicious names printed in the front, such as“Hall Full of Gold and Jade” and “Here Comes Good Fortune.” Residents from the local neighborhoods joined in, bringing their own festive arsenals.
When the clock struck midnight, heralding the Lunar New Year, all of a sudden, hundreds of long lines of firecrackers, 2,000, 5,000 or even 10,000 in a pack, exploded in perfect synchronization, tangling and tumbling on the ground like dragons spitting fire.Thousands of fireworks soared, whistled and burst into full blossom, lighting up the sky as far as eyes could reach. It was 1,000 times more magnificent than the Disneyland show.
The correlation between fireworks and pollution fatally damaged the image of fireworks that had been admired since ancient times. PM2.5 made them lose their shine and those who lit them felt uneasy and hesitant. Firework sales witnessed a steady downturn. Across the country, thousands of firework factories were closed within a few years.
从权责明确的角度看，成员的权利和集体资产所有权的归属是依照集体经济组织内部成员所占有的份额进行分配的。国家《物权法》规定，所有权可以分为处分、使用、占有以及收益4个方面的权利。所以，应该赋予集体经济组织成员相应的处分权、使用权、占有权以及收益权，允许享有权利的成员在法律许可范围内有偿退出、抵押以及继承。对于成员的责任，要明确集体资产的管理与运营责任主体，组成成员通过成员大会行使集体资产管理的决策权以及监督权，同时实现资产收益的分配与协调，依照权利与责任相统一的基本原则，集体经济组织的成员也应该承担相应的经营管理风险。
通过计算散射参数曲线与其低频谐波的差值可以量化曲线平滑程度.这种方法具有参数少和计算量小等优点.具体实现过程分为2个步骤：滤波和求波动偏差.
A British colleague who came to Beijing just days ahead of the festival could hardly sleep for a fortnight.Sporadic blasts every night gave him the feeling of living in a war zone.
You could simply go outside your apartment and shoot fireworks up in the sky. It was quite an experience,as you lit the fuse, took one or two steps back, and admired the firework whooshing up in front of your eyes and blazing to its full glory right on top of your head.Janitors and guards held fire extinguishers and brooms,swiftly cleaning up the aftermath mess.
传统的垃圾桶需要环卫工人一个一个的检查是否装满，是否需要清理，而且在进行垃圾回收时，还需要人工查看垃圾桶内的垃圾种类，大大地增加了环卫工人的工作负担，当人的手或物体接近投物口15cm时，垃圾桶自动开盖，功能实现单一，并且开关盖这一功能机械损耗程度很高，所以并不适实用。此项目在其缺点上进行改进：直接采用投物口未关闭的垃圾箱，减少垃圾箱的机械损耗，并且增加了一个垃圾检测分类的物联网感知系统，比如检测垃圾是否装满，垃圾的气味检测等，对垃圾桶的后续开发奠定了很好的基础。同时本项目具有模式创新和科技创新，可以很好的改变现有城市环卫工作方式并为未来城市规划、领导决策提供大数据支撑。
Fireworks have stopped being an essential part of the celebration and become a fading memory,giving way to safer streets,cleaner air and better sleep
This situation continued for several years. But from 2011, the public started to view fireworks from a new perspective. PM2.5, particulate matter with a diameter of less than 2.5 microns, became an ugly buzzword. People started to have more awareness of air quality, regarding fireworks as the culprit fouling up the air.
Beijing’s suburban extravaganza became history in 2005. With public opinion strongly calling for preserving the tradition of fireworks during the Spring Festival,legislators gave the green light to fireworks downtown.As fireworks became legal in most places, people did not have to gather in designated places to binge any more.Helicopters took a video of the midnight panorama.Fireworks dotted every corner of the city, apart from some firework-free zones.
The year 2017 saw a decisive result in the battle between fireworks and the public demand for blue skies. Beijing residents were regularly using air purifiers indoors and checking the air quality index. Torn between traditional fun and clear air, the public voted for the latter. After 12 years of being allowed in the downtown areas, fireworks were once again exiled to outside the Fifth Ring Road.
The difficulty in finding a store to buy fireworks and then a place to set them off took the fun out of it. One hardcore fan drove several hours to locate a stall, only to be disappointed to find there was nothing that would shoot up in the sky. After purchasing several ground and handle fountains, he became even more disheartened on being asked to set them off at an open ground 50 meters away. He is not a fan anymore.
How fireworks faded out of the festive life in Beijing is a reflection of what happened across the nation.As China experiences rapid development and people enjoy better lives, tradition changes along with time.Regulations accompanying traditions are also modified accordingly, always with a people-centered approach.The public’s priority has been shifting, from tradition and fun to safety and environmental protection, resulting in revised policies.
The 2019 Spring Festival ended on a note of peace and serenity. Fireworks have stopped being an essential part of the celebration and become a fading memory,giving way to safer streets, cleaner air and better sleep.That is how it should be, a fond memory that will not make it hard to breathe. ■
Copyedited by Sudeshna Sarkar
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