{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":5,"startPagecode":1},"records":[{"abstractinfo":"本文对煤矿瓦斯治理中压入<span style=\"color:red\">式</span>与<span style=\"color:red\">抽吸</span><span style=\"color:red\">式</span><span style=\"color:red\">通风</span>方式对掘进面附近瓦斯浓度稀释规律进行了对比分析,主要考察两种<span style=\"color:red\">通风</span>方式对于瓦斯析出量出现变动的适应能力.结果发现:压入<span style=\"color:red\">式</span><span style=\"color:red\">通风</span>方式在掘进面附近引起较大的漩涡流动,不利于瓦斯气体的稀释,而<span style=\"color:red\">抽吸</span><span style=\"color:red\">式</span><span style=\"color:red\">通风</span>方式则无明显涡流存在.传统压入<span style=\"color:red\">式</span><span style=\"color:red\">通风</span>方式不能完全解决瓦斯析出变动带来的危险浓度区较大的问题,而采用<span style=\"color:red\">抽吸</span><span style=\"color:red\">式</span>方式后,可有效避免该问题的出现.","authors":[{"authorName":"由长福","id":"ba86c921-c75e-4d1c-bade-af3c8a7e13e4","originalAuthorName":"由长福"},{"authorName":"徐旭常","id":"b7aa32d4-de9d-4a25-b9d9-c1aaa0f613dd","originalAuthorName":"徐旭常"}],"doi":"","fpage":"702","id":"f2793a77-fe6e-4246-ba1d-f6af0c2ce23e","issue":"4","journal":{"abbrevTitle":"GCRWLXB","coverImgSrc":"journal/img/cover/GCRWLXB.jpg","id":"32","issnPpub":"0253-231X","publisherId":"GCRWLXB","title":"工程热物理学报   "},"keywords":[{"id":"b092ca54-a0fc-42cd-8eff-60e790bda8e9","keyword":"瓦斯","originalKeyword":"瓦斯"},{"id":"d2f84329-13ba-4f43-a89a-0623d40d006d","keyword":"稀释","originalKeyword":"稀释"},{"id":"9e47b722-67ca-40e7-8a09-48d6c11fb4fa","keyword":"掘进巷道","originalKeyword":"掘进巷道"},{"id":"3a0e254c-f45f-4f31-9baf-4e2aed32c6a1","keyword":"压入<span style=\"color:red\">式</span><span style=\"color:red\">通风</span>","originalKeyword":"压入式通风"},{"id":"13938a95-a2b5-4562-a326-3312b9ec828b","keyword":"<span style=\"color:red\">抽吸</span><span style=\"color:red\">式</span><span style=\"color:red\">通风</span>","originalKeyword":"抽吸式通风"}],"language":"zh","publisherId":"gcrwlxb200704051","title":"压入<span style=\"color:red\">式</span>与<span style=\"color:red\">抽吸</span><span style=\"color:red\">式</span><span style=\"color:red\">通风</span>中瓦斯浓度对比分析","volume":"28","year":"2007"},{"abstractinfo":"本文进一步分析了低反动度附面层<span style=\"color:red\">抽吸</span><span style=\"color:red\">式</span>压气机概念,并讨论了该压气机的设计要点和应用范围;分析了<span style=\"color:red\">抽吸</span>掉的附面层内的低能高熵流体的可能利用途径,以及对于不同的利用方式,效率的评估方法;基于上述概念设计了一台亚声速低反动度附面层<span style=\"color:red\">抽吸</span><span style=\"color:red\">式</span>压气机,详细地分析了该压气机的气动参数选取与分布特点,以及该压气机内部的三维分离流动及其控制规律.","authors":[{"authorName":"王松涛","id":"c98a727c-3fc1-4737-847c-7799768067ef","originalAuthorName":"王松涛"},{"authorName":"羌晓青","id":"d8b7942e-db52-43d3-b1c0-3b5f8f05dc9f","originalAuthorName":"羌晓青"},{"authorName":"冯国泰","id":"3dae52a9-c21c-4100-995b-f1b5d80f7eff","originalAuthorName":"冯国泰"},{"authorName":"林伟春","id":"9cc3e12c-f8ec-47cb-b2b4-50531cf9a7f6","originalAuthorName":"林伟春"},{"authorName":"王仲奇","id":"8d5b7802-dd23-43a6-bbb6-909c977562e2","originalAuthorName":"王仲奇"}],"doi":"","fpage":"35","id":"e1ad76a1-fe79-4e61-ab49-a71ab60ae19f","issue":"1","journal":{"abbrevTitle":"GCRWLXB","coverImgSrc":"journal/img/cover/GCRWLXB.jpg","id":"32","issnPpub":"0253-231X","publisherId":"GCRWLXB","title":"工程热物理学报   "},"keywords":[{"id":"dd1cbb6a-7a1a-456b-b28b-419f0d1eec93","keyword":"高负荷压气机","originalKeyword":"高负荷压气机"},{"id":"baf37b4d-663a-432a-83ac-1e8409c2b4b9","keyword":"低反动度","originalKeyword":"低反动度"},{"id":"e425435c-eb10-4e7d-843f-b4d9c5e92c08","keyword":"附面层<span style=\"color:red\">抽吸</span>","originalKeyword":"附面层抽吸"},{"id":"9a904df6-8d9b-4e15-9f66-c4d9b595f00e","keyword":"分离流动","originalKeyword":"分离流动"}],"language":"zh","publisherId":"gcrwlxb200901009","title":"低反动度附面层<span style=\"color:red\">抽吸</span><span style=\"color:red\">式</span>压气机及其内部流动控制","volume":"30","year":"2009"},{"abstractinfo":"合理的夜间<span style=\"color:red\">通风</span>是利用自然冷源降低建筑能耗的有效手段,同时能够提高室内热舒适.目前已有研究多是基于具体案例的模拟分析,缺乏对最优节能<span style=\"color:red\">通风</span>换气普适性方法的研究.本文基于非线性优化反问题思路,以最小化模拟周期内制冷设备及风机电耗总量最小作为优化目标,提出一种主动<span style=\"color:red\">式</span>建筑理想节能机械<span style=\"color:red\">通风</span>策略的确定方法.结果表明,优化后,北京夏季典型日和极端日总能耗分别减小22％及33％,典型日峰值冷负荷减少20.9％,制冷设备开启时间减少约9h.","authors":[{"authorName":"程瑞","id":"439c4c4e-7093-4035-99d9-6c2d2a8e62ba","originalAuthorName":"程瑞"},{"authorName":"王馨","id":"ce18e185-653f-4658-8c06-36eb6575da77","originalAuthorName":"王馨"},{"authorName":"张寅平","id":"ca933f8d-6e24-44a1-a671-b7f6f2df247c","originalAuthorName":"张寅平"}],"doi":"","fpage":"935","id":"ffa56e23-70ba-4d57-9d87-aa9a9fa26559","issue":"5","journal":{"abbrevTitle":"GCRWLXB","coverImgSrc":"journal/img/cover/GCRWLXB.jpg","id":"32","issnPpub":"0253-231X","publisherId":"GCRWLXB","title":"工程热物理学报   "},"keywords":[{"id":"3e981715-875b-475a-96bd-255f6e8ddeed","keyword":"建筑节能","originalKeyword":"建筑节能"},{"id":"39c9e303-9f85-4e22-a7fb-c5c7c7c0c755","keyword":"机械<span style=\"color:red\">通风</span>","originalKeyword":"机械通风"},{"id":"d9ec9975-fdf8-41de-a8ae-f7b6f7081a54","keyword":"反问题","originalKeyword":"反问题"}],"language":"zh","publisherId":"gcrwlxb201305032","title":"主动<span style=\"color:red\">式</span>建筑理想节能<span style=\"color:red\">通风</span>策略确定方法","volume":"34","year":"2013"},{"abstractinfo":"招远市蚕庄金矿从上庄矿区的实际情况出发,对原<span style=\"color:red\">通风</span>系统存在的严重问题进行技术改造,成功地应用了同侧两翼对角<span style=\"color:red\">式</span><span style=\"color:red\">通风</span>系统,取得了较好的经济效益和社会效益.","authors":[{"authorName":"邵珠江","id":"e7e29ab0-e1ed-45ee-9d27-d63e160c7e32","originalAuthorName":"邵珠江"},{"authorName":"付士新","id":"41d4bc92-53a1-42f1-a321-2bdfc269cf15","originalAuthorName":"付士新"},{"authorName":"陈建设","id":"764121a4-2910-4afa-952c-5b8aef64a415","originalAuthorName":"陈建设"},{"authorName":"高其文","id":"91553e5e-8b0f-4955-8dc1-63f36df16c2a","originalAuthorName":"高其文"},{"authorName":"杨洪涛","id":"5061e504-5086-446f-a60c-451fce37c959","originalAuthorName":"杨洪涛"},{"authorName":"唐海信","id":"6c2bc4cf-2fce-47af-9363-19f3b4b878c1","originalAuthorName":"唐海信"}],"doi":"10.3969/j.issn.1001-1277.2001.03.007","fpage":"25","id":"11203a1a-c91d-44ec-a18a-dae959c3d79f","issue":"3","journal":{"abbrevTitle":"HJ","coverImgSrc":"journal/img/cover/HJ.jpg","id":"44","issnPpub":"1001-1277","publisherId":"HJ","title":"黄金"},"keywords":[{"id":"b42f263d-4a8e-4825-9536-a75160cbc7e1","keyword":"同侧两翼","originalKeyword":"同侧两翼"},{"id":"380a513c-86f5-4142-ac30-4d0595df3cef","keyword":"对角<span style=\"color:red\">式</span>","originalKeyword":"对角式"},{"id":"51474077-9e25-4bb2-aa60-83394bc115b5","keyword":"机械抽出<span style=\"color:red\">式</span>","originalKeyword":"机械抽出式"}],"language":"zh","publisherId":"huangj200103007","title":"同侧两翼对角<span style=\"color:red\">式</span><span style=\"color:red\">通风</span>系统的应用","volume":"22","year":"2001"},{"abstractinfo":"本文利用定常的三维Navier-Stokes方程和RNGk-ε湍流模型,对双吸<span style=\"color:red\">式</span>离心<span style=\"color:red\">通风</span>机的内部三维流动进行了数值模拟,并应用能量理论处理不同工况下的全流场流动参数,获得了能量梯度函数K的分布,并且对不同流道内压力面和吸力面上的静压分布进行了分析.研究表明,双吸<span style=\"color:red\">式</span>离心<span style=\"color:red\">通风</span>机叶轮出口区域是容易激发流动不稳定的关键位置;在叶道子午面上,沿轴向越接近轮盖处,流动越容易出现不稳定;同一工况下沿叶轮旋转方向接近挡流板的流道内的流动相较于其它流道内流动更容易出现失稳.","authors":[{"authorName":"张滨炜","id":"b383b384-56b4-429f-b709-4cc1181ce091","originalAuthorName":"张滨炜"},{"authorName":"窦华书","id":"64831393-e48a-402d-9c45-500f0dc98b68","originalAuthorName":"窦华书"},{"authorName":"魏义坤","id":"b3c78f05-3472-40c6-a99b-23eea542f14c","originalAuthorName":"魏义坤"},{"authorName":"陈永宁","id":"b60c42f3-b13e-44a4-bf76-d9abbec11534","originalAuthorName":"陈永宁"},{"authorName":"何海江","id":"7dd47e73-2748-4a68-a526-f250502dfc67","originalAuthorName":"何海江"},{"authorName":"叶信学","id":"ba579ba2-eda5-4e19-86ce-9450a1422e71","originalAuthorName":"叶信学"}],"doi":"","fpage":"1917","id":"d83e3511-d901-486b-816f-d2658adc27cc","issue":"9","journal":{"abbrevTitle":"GCRWLXB","coverImgSrc":"journal/img/cover/GCRWLXB.jpg","id":"32","issnPpub":"0253-231X","publisherId":"GCRWLXB","title":"工程热物理学报   "},"keywords":[{"id":"ad0893a7-4f08-4b9e-85cd-87480acb0ba4","keyword":"离心<span style=\"color:red\">通风</span>机","originalKeyword":"离心通风机"},{"id":"9a9e2dd3-7619-4f8f-90a9-417656191ab1","keyword":"不稳定性","originalKeyword":"不稳定性"},{"id":"deb81143-3118-4dec-bc65-a2e2889f42e9","keyword":"能量梯度","originalKeyword":"能量梯度"},{"id":"e3184e0e-79d7-45a5-816d-091c947d51e1","keyword":"数值模拟","originalKeyword":"数值模拟"}],"language":"zh","publisherId":"gcrwlxb201509015","title":"基于能量梯度理论双吸<span style=\"color:red\">式</span>离心<span style=\"color:red\">通风</span>机失稳研究","volume":"36","year":"2015"},{"abstractinfo":"针对开采多年老矿山的具体情况,在<span style=\"color:red\">通风</span>系统改造中灵活应用了回风侧为主的多级机站<span style=\"color:red\">通风</span>系统.同时,将上下行间隔<span style=\"color:red\">式</span>阶段<span style=\"color:red\">通风</span>网络和棋盘<span style=\"color:red\">式</span>阶段<span style=\"color:red\">通风</span>网络有机结合,建立起了二者混合式的阶段<span style=\"color:red\">通风</span>网络,较好地解决了用风段污风串联、漏风等问题.","authors":[{"authorName":"王波","id":"a3591dda-0820-4415-89f5-98794e4187be","originalAuthorName":"王波"},{"authorName":"陈宝智","id":"422260b5-c59b-4616-908d-5ec71014b771","originalAuthorName":"陈宝智"},{"authorName":"陈喜山","id":"630413a1-14a0-4147-ba0f-a6d694fae02e","originalAuthorName":"陈喜山"},{"authorName":"梁晓春","id":"d5a856ce-71fd-40bb-828f-0c991ab25e8e","originalAuthorName":"梁晓春"},{"authorName":"郭晓芳","id":"41e3241d-d86e-45f7-8969-28cd911683a8","originalAuthorName":"郭晓芳"}],"doi":"10.3969/j.issn.1001-1277.2006.04.006","fpage":"22","id":"8085b198-11a6-4147-bb5f-4d9e5e20a300","issue":"4","journal":{"abbrevTitle":"HJ","coverImgSrc":"journal/img/cover/HJ.jpg","id":"44","issnPpub":"1001-1277","publisherId":"HJ","title":"黄金"},"keywords":[{"id":"10e6095a-aaab-49b6-8b45-d62868e387e8","keyword":"回风侧","originalKeyword":"回风侧"},{"id":"48fd856d-69ae-44ee-a8d0-16cb2e0d34f9","keyword":"多级机站","originalKeyword":"多级机站"},{"id":"6a8bfd1c-f7f8-413e-86a6-ea0fe8a271ef","keyword":"<span style=\"color:red\">通风</span>网络","originalKeyword":"通风网络"},{"id":"027bf178-e276-42e7-bc90-b8eabff79c8a","keyword":"棋盘<span style=\"color:red\">式</span>","originalKeyword":"棋盘式"},{"id":"714a8b93-aa7e-444b-9ee8-5077b80c8bc5","keyword":"上下行间隔<span style=\"color:red\">式</span>","originalKeyword":"上下行间隔式"}],"language":"zh","publisherId":"huangj200604006","title":"回风侧多级机站<span style=\"color:red\">通风</span>系统的建立和混合式阶段<span style=\"color:red\">通风</span>网络的应用","volume":"27","year":"2006"},{"abstractinfo":"采用计算机记录毛细<span style=\"color:red\">抽吸</span>量实时变化曲线的方法,研究了环路热管吸液芯对不同工质的毛细<span style=\"color:red\">抽吸</span>特性,结果表明所有的吸液芯毛细<span style=\"color:red\">抽吸</span>过程均可分阶段采用玻耳兹曼方程进行描述,其误差在启动阶段和稳健<span style=\"color:red\">抽吸</span>阶段分别在5%和1%以内.工质的表面张力越大、密度越大,吸液芯的毛细<span style=\"color:red\">抽吸</span>量就越大;工质的表面张力越大、黏度越小,毛细<span style=\"color:red\">抽吸</span>速度越大.对孔隙率为45%～56%的吸液芯进行毛细<span style=\"color:red\">抽吸</span>实验发现,随着孔隙率的增大,<span style=\"color:red\">抽吸</span>速度和毛细<span style=\"color:red\">抽吸</span>量均随之增大,可见适当提高吸液芯的孔隙率有助于提高环路热管的性能.","authors":[{"authorName":"李金旺","id":"35a4ab42-be84-4abf-94f9-89fd6e64a137","originalAuthorName":"李金旺"},{"authorName":"邹勇","id":"d9c60bb3-420d-4568-9c85-58c69c4e17e8","originalAuthorName":"邹勇"},{"authorName":"赵亮","id":"1cd52452-cb73-4b82-a13e-6beee829173a","originalAuthorName":"赵亮"},{"authorName":"程林","id":"bf0ac118-a1c3-463e-84f6-5e8f9e63f161","originalAuthorName":"程林"}],"doi":"","fpage":"839","id":"fe7b9a77-ded6-4fbb-8be5-bb83b56261b7","issue":"5","journal":{"abbrevTitle":"GCRWLXB","coverImgSrc":"journal/img/cover/GCRWLXB.jpg","id":"32","issnPpub":"0253-231X","publisherId":"GCRWLXB","title":"工程热物理学报   "},"keywords":[{"id":"ba33765c-db5a-4ddc-a855-b3fda97e984e","keyword":"毛细<span style=\"color:red\">抽吸</span>特性","originalKeyword":"毛细抽吸特性"},{"id":"3d5ec67e-7ee1-4039-ad84-a5d256d1c7ca","keyword":"吸液芯","originalKeyword":"吸液芯"},{"id":"956fd179-8480-4c74-866b-d84f10d32d24","keyword":"玻耳兹曼方程","originalKeyword":"玻耳兹曼方程"},{"id":"8d837de9-50a7-413d-a125-20a1e39d97e4","keyword":"工质","originalKeyword":"工质"},{"id":"9852ecb4-eea0-4cf1-b493-d22ae13a4c34","keyword":"孔隙率","originalKeyword":"孔隙率"}],"language":"zh","publisherId":"gcrwlxb201005031","title":"环路热管吸液芯毛细<span style=\"color:red\">抽吸</span>特性研究","volume":"31","year":"2010"},{"abstractinfo":"通过数值计算的方法对冲压转子中的三维流场以及轮毂<span style=\"color:red\">抽吸</span>后的流场进行了分析。研究发现,冲压转子中,轮毂处的分离影响了叶根至70%叶高截面的流动,轮毂处的角区分离限制了冲压转子的性能,使之只能工作在较低的背压工况下。而通过轮毂<span style=\"color:red\">抽吸</span>可以改善角区流动,提高冲压转子的压比和效率,并且<span style=\"color:red\">抽吸</span>位置在分离起始点位置时,效果最好。在<span style=\"color:red\">抽吸</span>流量占进口质量流量的0.5%时,效率可提高4%,压比提高20%。","authors":[{"authorName":"扈延林","id":"5f7b8b86-8336-4700-927f-dca94c595e2f","originalAuthorName":"扈延林"},{"authorName":"孙小磊","id":"05f86d74-9ca5-422f-9ba1-6a4e3b6d3e69","originalAuthorName":"孙小磊"},{"authorName":"唐菲","id":"6db21506-b059-4ce3-958d-b78188c3ada2","originalAuthorName":"唐菲"},{"authorName":"赵庆军","id":"7aac3164-e14e-4439-81fa-01b10e138693","originalAuthorName":"赵庆军"},{"authorName":"徐建中","id":"6c46d90b-0cdd-42a6-8171-6072d1d8c1a4","originalAuthorName":"徐建中"}],"doi":"","fpage":"1111","id":"b90d0609-0b0d-41f3-a229-5ec795ec620b","issue":"7","journal":{"abbrevTitle":"GCRWLXB","coverImgSrc":"journal/img/cover/GCRWLXB.jpg","id":"32","issnPpub":"0253-231X","publisherId":"GCRWLXB","title":"工程热物理学报   "},"keywords":[{"id":"2230b089-1df1-4b34-bf0f-772f8c318556","keyword":"冲压转子","originalKeyword":"冲压转子"},{"id":"3f071764-3eea-4660-9459-f4e181adac7d","keyword":"轮毂边界层<span style=\"color:red\">抽吸</span>","originalKeyword":"轮毂边界层抽吸"},{"id":"527e5875-64de-4737-8ecd-e0e8046f507e","keyword":"数值模拟","originalKeyword":"数值模拟"}],"language":"zh","publisherId":"gcrwlxb201107008","title":"冲压转子流场和轮毂<span style=\"color:red\">抽吸</span>处理分析","volume":"32","year":"2011"},{"abstractinfo":"为合理地完善矿井<span style=\"color:red\">通风</span>系统，实现矿井安全清洁生产，运用气压计基点测定法对某矿井进行了<span style=\"color:red\">通风</span>阻力测定，得到该矿井<span style=\"color:red\">通风</span>阻力分布状况。通过对该矿井<span style=\"color:red\">通风</span>阻力测定、矿井<span style=\"color:red\">通风</span>阻力系统误差计算及分析，得出了该矿矿井<span style=\"color:red\">通风</span>系统相关参数的具体数值，为今后经济合理地完善矿井<span style=\"color:red\">通风</span>系统提供依据。","authors":[{"authorName":"司政有","id":"845a6d2c-4e88-4398-989a-eac9d48480b6","originalAuthorName":"司政有"},{"authorName":"陈日辉","id":"59daf4c0-2014-4333-9197-6e0a8e648888","originalAuthorName":"陈日辉"},{"authorName":"章丽霞","id":"28ae78d9-449e-4ccb-a674-5a9b21bb99ed","originalAuthorName":"章丽霞"}],"doi":"10.11792/hj20161010","fpage":"48","id":"5e74b201-93a2-4a96-988f-819f4cb2ed64","issue":"10","journal":{"abbrevTitle":"HJ","coverImgSrc":"journal/img/cover/HJ.jpg","id":"44","issnPpub":"1001-1277","publisherId":"HJ","title":"黄金"},"keywords":[{"id":"f02215a1-2656-4562-9de8-5531ac4706ed","keyword":"<span style=\"color:red\">通风</span>系统","originalKeyword":"通风系统"},{"id":"f351cc50-3368-473c-a79a-1a63cb37e4c9","keyword":"<span style=\"color:red\">通风</span>阻力","originalKeyword":"通风阻力"},{"id":"06453846-7a90-4a52-8696-0d2bbb644b3d","keyword":"气压计","originalKeyword":"气压计"},{"id":"c00adc00-005b-454e-975a-026e7a352819","keyword":"基点测定法","originalKeyword":"基点测定法"},{"id":"ced31d2b-734e-4818-b3d0-3a39f8e0ce4c","keyword":"系统误差","originalKeyword":"系统误差"}],"language":"zh","publisherId":"huangj201610015","title":"某矿井<span style=\"color:red\">通风</span>阻力测定分析","volume":"37","year":"2016"},{"abstractinfo":"结合鸡笼山金矿生产实际,针对其一期工程对角抽出<span style=\"color:red\">式</span>集中<span style=\"color:red\">通风</span>系统存在的问题,详细介绍了二期工程多级机站<span style=\"color:red\">通风</span>系统的特点及实施情况.多级机站<span style=\"color:red\">通风</span>系统经过3～4年运行,达到了改善作业条件、满足生产需要的预期效果.","authors":[{"authorName":"唐敏伟","id":"550abf58-5a8a-4205-baa4-b99928a12b1b","originalAuthorName":"唐敏伟"},{"authorName":"朱先艳","id":"569b9c26-e830-414b-9daa-e674ce017f6f","originalAuthorName":"朱先艳"}],"doi":"10.3969/j.issn.1001-1277.2008.10.008","fpage":"29","id":"2bfddfa0-aa27-42b5-9716-297d65429db1","issue":"10","journal":{"abbrevTitle":"HJ","coverImgSrc":"journal/img/cover/HJ.jpg","id":"44","issnPpub":"1001-1277","publisherId":"HJ","title":"黄金"},"keywords":[{"id":"b268db24-979a-433b-80df-6c351910a6da","keyword":"多级机站<span style=\"color:red\">通风</span>系统","originalKeyword":"多级机站通风系统"},{"id":"1cadf2ff-45ee-401f-9a19-6287ca221b35","keyword":"二期工程","originalKeyword":"二期工程"},{"id":"ab354905-4ceb-452e-86a6-52a4a7c5e298","keyword":"鸡笼山金矿","originalKeyword":"鸡笼山金矿"}],"language":"zh","publisherId":"huangj200810008","title":"多级机站<span style=\"color:red\">通风</span>系统在鸡笼山金矿二期工程的应用实践","volume":"29","year":"2008"}],"totalpage":722,"totalrecord":7217}