化解物业矛盾 建设和谐社区——与北京Naga上院总裁李建国谈物业管理模式

社区是否和谐,与每位成员的日常生活息息相关,更关系着整个和谐社会的构建。建设社会主义和谐社会,要从建设和谐社区入手,使社区在提高居民生活水平和质量上发挥服务作用,在维护社会稳定、为群众创造安居乐业的良好环境上发挥促进作用。然而,有关部门、单位该怎样结合自己的工作实际为构建“和谐社区”出力?北京Naga上院推出的“物业革命”,从制度上改变业主和物业对立的利益关系,有效地化解了业主与物业公司的矛盾,大大促进了和谐社区的建设。

Micropalaeontological and Geochemical Evidence of the Late Jurassic Radiolarians Cherts of Naga Ophiolite Hill, Nagaland, Northeast-India

We analyzed the radiolarian assemblages (pelagic sediments) and geochemical studies of 15 samples collected from Meluri district Nagaland, Naga Hills Ophiolite belt (NHO) and it consists of the Flysch Naga-Arakan-Yoma trough beyond the Indo-Myanmar border. It reflects one of the many components of the Himalayan Orogenic systems of Tethyan oceanic crust discovered in Nagaland at Meluri district of India and they have very well-preserved studies and can be identified to Upper Jurassic (Kimmeridgian-mid-Tithonian). As well as a continuous sequence of Kimmeridgian-mid-Tithonian, five radiolarian assemblages have been identified in this study. This is so far the first recovery of pelagic sediment assemblages (Radiolarians) from the Naga Hills Ophiolite complex. Samples of Naga Hills Ophiolite belts fell in the Sublitharenite, Litharenite, and Fe-shale Fe-sand area, and the A-CN-K diagram indicates that these sediments in the source region were exposed deep to moderate weathering conditions. In the discriminant plot, the Naga Hill-Ophiolite-Chert samples occupy the field of origin of the sediment quartzose, and the log (K2O/Na2O) versus SiO2 samples fall into the active continental marginal field, and only one sample falls into an island arch, suggesting that the tectonic framework of the Naga Hills-Chert samples was deposited in the active continental margin and the diagrams K2O/Al2O3 and MgO/Al2O3 illustrated the tectonic setting of the marine environment from Naga Hill Ophiolite Chert. Such findings have been consistent with the current geology of Naga Hills in the province of Nagaland.

Geochemical characteristics of mafic and ultramafic rocks from the Naga Hills Ophiolite, India:Implications for petrogenesis

The Naga Hills Ophiolite(NHO) represents one of the fragments of Tethyan oceanic crust in the Himalayan Orogenic system which is exposed in the Phek and Kiphire districts of Nagaland, India. The NHO is composed of partially serpentinized dunite, peridotite, gabbro, basalt, minor plagiogranite,diorite dyke and marine sediments. The basalts are mainly composed of fine grained plagioclase feldspar, clinopyroxene and orthopyroxene and show quenching and variolitic textures. The gabbros are characterized by medium to coarse grained plagioclase, orthopyroxene and clinopyroxene with ophitic to sub-ophitic textures. The ultramafic cumulates are represented by olivine, Cpx and Opx.Geochemically, the basalts and gabbros are sub-alkaline to alkaline and show tholeiitic features.The basalts are characterized by 44.1-45.6 wt.% of SiO_2 with 28-38 of Mg#, and the gabbros by38.7-43.7 wt.% of SiO_2, and 26-79 of Mg#. The ultramafic rocks are characterized by 37.4-52.2 wt.% of SiO_2, and 80-88 of Mg#. In multi-element diagrams(spidergrams) both basalts and gabbros show fractionated trends with strong negative anomalies of Zr. Nb. Sr and a gentle negative anomaly of P.However, the rare earth element(REE) plots of the basalts and gabbros show two distinct patterns. The first pattern, represented by light REE(LREE) depletion, suggests N-MORB features and can be interpreted as a signature of Paleo-Tethyan oceanic crust. The second pattern, represented by LREE enrichment with negligible negative Eu anomaly, conforms to E-MORB, and may be related to an arc tectonic setting. In V vs. Ti/1000, Cr vs. Y and AFM diagrams, the basalts and gabbros plot within Island Arc Tholeiite(IAT) and MORB fields suggesting both ridge and arc related settings. The ultramafic rocks exhibit two distinct patterns both in spidergrams and in REE plots. In the spidergram, one group displays highly enriched pattern, whereas the other group shows near flat pattern compared to primordial mantle. In the REE plot, one group displays steeper slopes [(La/Yb)N = 4.340-4.341], whereas the other displays moderate to flat slopes [(La/Yb)N = 0.97-1.67] and negative Eu-anomalies. Our study suggests that the ultramafic rocks represent two possible mantle sources(fertile and refractory).

PCL-b-PNAGA嵌段共聚物的制备及表征

聚己内酯(PCL)是一种性能优良的生物相容性及降解性良好生物材料,在生物医药方面有着巨大的潜能,但其具有很强的疏水性。本文利用N-丙烯酰基甘氨酰胺(NAGA)的亲水性通过可逆加成-断裂链转移聚合(RAFT)制备嵌段共聚物PCL-b-PNAGA,并通过FI-IR和1H-NMR表征证明了各个产物的成功制备。结果表明:成功制备了单体NAGA,大分子链转移剂PCL-CTA和嵌段共聚物PCL-b-PNAGA。

Tectono-magmatic evolution of Tethyan oceanic lithosphere in supra subduction zone fore arc regime:Geochemical fingerprints from crust-mantle sections of Naga Hills Ophiolite

The Naga Hills Ophiolite(NHO)belt in the Indo-Myanmar range(IMR)represents a segment of Tethyan oceanic crust and upper mantle that was involved in an eastward convergence and collision of the Indian Plate with the Burmese Plate during the Late Cretaceous-Eocene.Here,we present a detailed petrological and geochemical account for the mantle and crustal sections of NHO,northeastern India to address(i)the mantle processes and tectonic regimes involved in their genesis and(ii)their coherence in terms of the thermo-tectonic evolution of Tethyan oceanic crust and upper mantle.The NHO suite comprises well preserved crustal and mantle sections discretely exposed at Moki,Ziphu,Molen,Washelo and Lacham areas.The ultramafic-mafic lithologies of NHO are mineralogically composed of variable proportions of olivine,orthopyroxene,clinopyroxene and plagioclase.The primary igneous textures for the mantle peridotites have been overprinted by extensive serpentinisation whereas the crustal section rocks reflect crystal cumulation in a magma chamber.Chondrite normalised REE profiles for the cumulate peridotite-olivine gabbro-gabbro assemblage constituting the crustal section of NHO show flat to depleted LREE patterns consistent with their generation from depleted MORB-type precursor melt in an extensional tectonic setting,while the mantle peridotites depict U-shaped REE patterns marked by relative enrichment of LREE and HREE over MREE.These features collectively imply a dual role of depleted MORB-type and enriched arc-type mantle components for their genesis with imprints of melt-rock and fluid-rock interactions.Tectonically,studied lithologies from NHO correspond to a boninitic to slab-proximal Island Arc Tholeiite affinity thereby conforming to an intraoceanic supra subduction zone(SSZ)fore-arc regime coherent with the subduction initiation process.The geochemical attributes for the crustal and mantle sections of NHO as mirrored by Zr/Hf,Zr/Sm,Nb/Ta,Zr/Nb,Nb/U,Ba/Nb,Ba/Th,Ba/La and Nd/Hf ratios propound a two-stage petrogenetic process:(i)a depleted fore arc basalt(FAB)type tholeiitic melt parental to the crustal lithologies was extracted from the upwelling asthenospheric mantle at SSZ fore-arc extensional regime thereby rendering a refractory residual upper mantle;(ii)the crust and upper mantle of the SSZ fore arc were progressively refertilised by boninitic melts generated in response to subduction initiation and slab-dehydration.The vestiges of Tethyan oceanic lithosphere preserved in NHO represent an accreted intra-oceanic fore arc crust and upper mantle section which records a transitional geodynamic evolution in a SSZ regime marked by subduction initiation,fore arc extension and arc-continent accretion.

Petrography and tectonic provenance of the Miocene Surma Group in parts of the Naga-Manipur hills, in and around Nungba,Northeast India

The Miocene molassic Surma sandstones in parts of the Naga-Manipur hills,in and around Nungba,Northeast India have been studied for their tectonic provenance using petrography and heavy mineral contents.The poorly-to-moderately-sorted sub-litharenite to lithicarkose type Surma sandstones display predominance of monocrystalline quartz(av.61%)and include undulose and non-undulose varieties and almost equal amounts of feldspars(av.22%)and rock fragments(av.17%).The heavy mineral suite of Surma sandstones is dominated by transparent varieties(96%)that include garnet,zircon,tourmaline,rutile,staurolite,scapolite,phlogopite,chondrodite,humite,wollastonite,hedenbergite,sphene,chlorite,sillimanite,glauconite,glaucophane,and chloritoid.These heavy minerals characterize the granitic and silicic metamorphic complexes(GM)as well as the basic metamorphic rocks(MT)like greenstones,green schist,and amphibolites relating to passive continental margin setup.The opaque grains constitute nearly 4%of the total heavy minerals.The presence of euhedral,as well as abraded heavy mineral grains,further supports a mixed provenance having substantial contribution from sedimentary and metamorphic rocks.A ZTR index of approximately 45%indicates mineralogically sub-mature nature of Surma sandstones.Based on the light and heavy mineral suites coupled with the type of terrain available in the vicinity of the study area,it may be visualized that the sediment supply was largely made by the Himalaya,the IMR,the Shillong plateau,and the Mikir Hills under the influence of semi-arid to semi-humid climatic conditions.An overall supply from a recycled orogen provenance has been envisaged.

Origin of the Nagas in Manipur

There is no one accepted theory on the origin of the Nagas in Manipur;nevertheless the term“Naga”is not new,and is currently in use in Manipur and other parts of India.The Nagas had no written history till after their conversion to Christianity at the end of the 19th century.Reconstruction of the origin of the Nagas of Manipur is largely dependent on Oral History and Oral Tradition.There is however a kind of consensus that in the distant past,the Nagas of Manipur originated from China,they possess Mongoloid features.The reason for Naga migration into Manipur was the oppression they were subjected to by the Chinese Emperor.In the course of their migration they settled in Burma but ultimately made their way to Makhel,from which place they dispersed to different places in Manipur.To commemorate their origin and dispersal they built a giant monolith at Makhel as a memorial stone.Although the Nagas are divided into many tribes,they follow Naga customary law even at the present time,and the passage of rites of all Naga tribes bears a striking similarity.

从双Naga灌顶到九龙浴佛——佛教艺术中国化进程中的承续与嬗变

浴佛图像源自古代印度,是相关佛经叙事的视觉文化呈现,分为天神浴佛和双Naga浴佛两类,又以后者为主流,分为前、后两期,呈现出由半人格神向人格神转变的趋势。这一图像随佛教东传流播中国新疆和内地后,直接源自双Naga浴佛第一期的图像形式逐渐发生嬗变,在经历了5世纪至6世纪的曲折反复后于唐代凝固为典型的九龙浴佛之非人格神施沐新形式,并延续至今。佛教图像的嬗变折射出其宗教意蕴和重心的转移。从古代印度浴佛图像中折服外道、彰显佛教优越性的诉求,至中国政治文化语境中浴佛形象体现的佛教与皇权观念之融合,彰显出中印间对于浴佛内涵的不同理解。中国藏地、日本和东南亚等地政教互动模式同汉地的差异,也在相当程度上影响了其视觉文化层面的宗教表达,使其较为接近古代印度浴佛图像的风格,更具“原教旨”色彩。从双Naga灌顶到九龙浴佛所见佛教艺术中国化进程中的承续与嬗变,体现出具有深厚文化积淀的中华文明在对待外来文化和艺术形式时更具弹性、能动性和创造力的特质。

考虑EV车主需求的风-火-储联合调度多目标优化策略

风电出力的波动性和电动汽车充放电的无序性增加了电力系统调度的负担,因此,电力系统在发电侧需考虑各资源的分配,用户侧需合理安排电动汽车有序参与电网调度。针对此问题,建立考虑电动汽车车主需求的风-火-储联合调度多目标优化模型。以净负荷方差、系统运行总成本和车主支付费用最低为目标,通过设立不同的分时电价引导车主参与电网调度。采用NAGA-Ⅱ算法和模糊层次分析法求得帕雷托解集中的最优解。结果表明:策略能够有效地减少系统净负荷方差、平抑系统波动,同时减少系统的总运行成本和车主的支付费用;不同的分时电价标准对于电动汽车参与调度的影响不同。

狗不理餐厅——东直门NAGA上院店

君子大隐．宴市以德。珍品无界，礼待天下。王者必居天下之中，用九．天德．泽四方。

基于快速非支配排序遗传算法的共享电单车归还策略

为满足当前共享电单车随取随停的需求,解决其缺乏规范管理而导致的乱停乱放现象及其所呈现出的“多、散、乱”的状态与区域性供给不平衡问题,构建了基于多目标规划模型的平衡状态下的共享电单车归还模型。首先,应用快速非支配排序遗传算法(NSGA-Ⅱ)确定平衡状态下的归还点分配方案;然后,结合专家打分、COWA算子、博弈论组合赋权法和TOPSIS法,从帕累托最优解集中选出最佳方案;最后,通过对比普通归还点分配方案里的用户所需付出的步行代价、时间代价和共享电单车的区域供给性,来验证实验结果的有效性。

气悬浮无摩擦气缸的结构多目标优化设计

为了优化模态测试悬挂系统中气悬浮无摩擦气缸的结构参数,建立了活塞和缸壁间隙内的气体压力分布、气体泄漏流量和活塞径向承载能力的数学模型,提出一种基于非支配排序遗传算法(NSGA-II)的气缸-活塞优化设计方法。以气缸结构参数作为优化变量,以降低泄漏流量和提高径向承载能力为设计目标,等价转化目标函数,并将气体流动的复杂非线性方程组转化为约束条件进行处理。该方法能够获得目标空间内分布均匀的Pareto最优参数集,全面掌握活塞结构参数的最优取值。试验结果表明,优化后的气缸能有效地降低摩擦力,减小气体泄漏流量,从而验证了该方法在工程应用中的有效性。

增程式电动校车动力传动系统匹配设计

针对校车的行驶特点,采用与北京城市公交工况类似的德国纽伦堡循环工况下的整车能耗量作为经济性评价指标,通过加权原地起步加速时间作为动力性评价指标来评价动力传动系统的匹配。在Simulink里用仿真模型代替传统燃油经济性目标函数的繁琐编程,采用多目标优化遗传算法NSGA-II,利用ISIGHT与MATLAB/Simulink联合仿真,对增程式电动校车的传动比进行动力性和经济性的双目标优化。通过与车辆初始设计传动比相比较,结果表明,优化后的传动比,能够有效提高车辆的动力性和经济性。

佛传中的洗浴太子:从经文到图像的转变

浴佛节为纪念释迦诞生而设,是佛教的一个重要节日。摩耶夫人怀胎十月,于四月初八(一说二月初八)在一处花园里生下了释迦,多数佛经记载当时还有两条龙从空中口吐温水、凉水,为他洗浴,是为"二龙灌顶"。二龙灌顶图流行于藏传佛教和西域地区。只有一部佛经记载是九龙灌顶,但中国佛教却流传九龙灌顶之说,早在北魏时期九龙灌顶在当时已经得到普遍认同,佛教造像中频见九龙灌顶图像,佛教文献中也有记载。本文对二龙灌顶、九龙灌顶的佛经记载和图像流传进行了分析,提出从经文的二龙灌顶到图像的九龙灌顶的转变是佛教中国化的一个绝好例证。

纯电动乘用车动力总成悬置系统优化设计

纯电动乘用车动力总成悬置系统设计与整车NVH性能密切相关,因而动力总成悬置系统设计合理性非常重要。以某纯电动乘用车动力总成悬置系统为研究对象,对其进行动力学分析及优化设计。首先建立动力总成悬置系统的动力学模型,其次进行悬置元件布置位置优化,并采用灵敏度分析法确定参变量,再次基于能量解耦法及NAGA-Ⅱ优化算法选择目标函数并设定约束条件进行悬置系统优化,最后结合实车测试结果,通过优化结果与实车测试结果对比分析的方式,得出优化结果合理有效。

北朝佛传故事龙浴太子形象演变

佛传故事龙浴太子形象在北朝时期的西域、中原及北方佛教造像碑、石窟寺中比较常见,这是运用图像宣扬佛教的一种形式,具有一定的时代性和地域特点。从该图像中太子与龙的形象演变能够看出曾经受到犍陀罗艺术的影响,并逐渐与汉文化因素相融合。根据与龙浴太子形象并存的佛像主尊和其他佛像身份变化,体现出佛教信仰由小乘向大乘的转变,符合当时战乱频仍状况下人们希冀社会安定的心理需求。

洪水、葫芦神话的衍变与印缅那加族的迁移

流传于云南的洪水葫芦神话包含三个内核:洪水、兄妹成婚、葫芦生人,是各民族文化交汇的产物。最初是由杜宇族人带来的蜀国反映人与自然斗争的洪水神话;其次为朱提的洪水—兄妹成婚神话,反映了败亡南逃的杜宇族人对"直眼人"时代的反思和开辟新时代的愿望;在古代哀牢地区产生并传至云南各民族的洪水—兄妹成婚—葫芦神话,主题为各民族皆兄弟。印缅那加族的洪水葫芦神话表明,他们的先民大约在7世纪时从云南迁出,迁移途中经过了佤族居住地区。