mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
First principles calculations of alloying element diffusion coefficients in Ni using the five-frequency model

The diffusion coefficients of several alloying elements (Al, Mo, Co, Ta, Ru, W, Cr, Re) in Ni are directly calculated using the five-frequency model and the first principles density functional theory. The correlation factors provided by the five-frequency model are explicitly calculated. The calculated diffusion coefficients show their excellent agreement with the available experimental data. Both the diffusion pre-factor (D_0) and the activation energy (Q) of impurity diffusion are obtained. The diffusion coefficients above 700 K are sorted in the following order: D_(Al) < D_(Cr) < D_(Co) < D_(Ta) < D_(Mo) < D_(Ru) < D_W < D_(Re). It is found that there is a positive correlation between the atomic radius of the solute and the jump energy of Ni that results in the rotation of the solute-vacancy pair (E_1). The value of E_2-E_1 (E_2 is the solute diffusion energy) and the correlation factor each also show a positive correlation. The larger atoms in the same series have lower diffusion activation energies and faster diffusion coefficients.
Removing paint from a metal substrate using a flattened top laser

In this paper, we investigate laser cleaning using a flattened top laser to remove paint coating from a metal substrate. Under the irradiation of a flattened top laser, the coating paint of the metal substrate can be removed efficiently by laser induced ablation, stress, and displacement force. The temperature distribution, stress, and displacement are calculated in the coating layer and substrate using finite element analysis. The effects of a Gaussian laser and a flattened top laser and the results of different diameters of laser spot are compared. The investigation shows that the flattened top laser can reduce the substrate damage and enhance the cleaning efficiency. This method meets the need of large area industrial cleaning applications by optimizing the flattened top laser parameters.
Fabricating a reactive surface on the fibroin film by a room-temperature plasma jet array for biomolecule immobilization

A simple dielectric barrier discharge (DBD) jet array was designed with a liquid electrode and helium gas. The characteristics of the jet array discharge and the preliminary polymerization with acrylic acid (AA) monomer were presented. The plasma reactor can produce a cold jet array with a gas temperature lower than 315 K, using an applied discharge power between 6 W and 30 W (V_(dis) × I_(dis)). A silk fibroin film (SFF) was modified using the jet array and AA monomer, and the treated SFF samples were characterized by atomic force microscopy (AFM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and contact angle (CA). The deposition rate of the poly acrylic acid (PAA) was able to reach 300 nm/min, and the surface roughness and energy increased with the AA flow rate. The FTIR results indicate that the modified SFF had more carboxyl groups (-COOH) than the original SFF. This latter characteristic allowed the modified SFF to immobilize more quantities of antimicrobial peptide (AP, LL-37) which inhibited the Escherichia coli (E. Coli) effectively.
Spatiotemporal chaos synchronization of an uncertain network based on sliding mode control

The sliding mode control method is used to study spatiotemporal chaos synchronization of an uncertain network. The method is extended from synchronization between two chaotic systems to the synchronization of complex network composed of N spatiotemporal chaotic systems. The sliding surface of the network and the control input are designed. Furthermore, the effectiveness of the method is analysed based on the stability theory. The Burgers equation with spatiotemporal chaos behavior is taken as an example to simulate the experiment. It is found that the synchronization performance of the network is very stable.
The complex variable meshless local Petrov-Galerkin method of solving two-dimensional potential problems

Based on the complex variable moving least-square (CVMLS) approximation and a local symmetric weak form, the complex variable meshless local Petrov-Galerkin (CVMLPG) method of solving two-dimensional potential problems is presented in this paper. In the present formulation, the trial function of a two-dimensional problem is formed with a one-dimensional basis function. The number of unknown coefficients in the trial function of the CVMLS approximation is less than that in the trial function of the moving least-square (MLS) approximation. The essential boundary conditions are imposed by the penalty method. The main advantage of this approach over the conventional meshless local Petrov-Galerkin (MLPG) method is its computational efficiency. Several numerical examples are presented to illustrate the implementation and performance of the present CVMLPG method.
Recent Advances in Plant Organelle Dynamics

Organelles are eukaryotic subcellular structures each possessing a specific set of functions. The morphology, abundance, and content of the organelles also undergo constant changes for optimal function and for plant adaptation to environmental variation. The six reviews and one research article published in this special issue on Organelle Biology cover a wide range of topics encompassing recent advances in the studies of the dynamic morphology, abundance, and movement of plant organelles, protein trafficking between organelles, changes in organelle composition and function in response to stress conditions, and machineries involved in the turnover of cellular constituents. We apologize for not being able to cover many other exciting works related to the broad field of plant organelle biology due to space limitations. However, we hope that this special issue can provide readers with a taste of the extremely dynamic nature of these pivotal subcellular compartments.
Antibacterial and antifungal properties of ent-kaurenoic acid from Smallanthus sonchifolius

To screen for the antibacterial activity of ent-kaurenoic acid (1) from the dichloromethane extract of Smallanthus sonchifolius leaves against Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis, Escherichia coli, Enterobacter aerogenes, Klebsiella pneumoniae, and Pseudomonas aeruginosa, and for its antifungal activity against Candida albicans, Trichophyton rubrum, and Epidermophyton floccosum. METHODS: Compound 1 was isolated by silica gel chromatography and its structure was elucidated by NMR spectroscopy. For assaying the antibacterial and antifungal activities of 1, the disk diffusion method was used, while the minimum inhibitory concentrations (MICs) were determined by the broth dilution method. RESULTS: With the disk diffusion method, 1 was found to be active against all the Gram-positive organisms tested (S. aureus, S. epidermidis, B. subtilis) at the lowest concentration of 1 000 μg?mL~(-1), while it was active against the fungus T. rubrum at 10 000 μg?mL~(-1). No inhibitory activity was observed against C. albicans, E. floccosum and all the Gram-negative test strains. The activity indices (AI) of 1 were noted to be highest against S. aureus and lowest against T. rubrum. Statistically significant differences were found between the mean inhibition zones (IZ) of 1 and the standard drugs (ofloxacin and clotrimazole). The results of the broth dilution MIC determination revealed that 1 exhibited moderate activity against S. aureus and S. epidermidis with MIC values of 125 μg?mL~(-1) and 250 μg?mL~(-1), respectively; and weak activity against B. subtilis with a MIC of 1 000 μg?mL~(-1). The growth of T. rubrum in the MIC assay was not inhibited at the highest tested concentration of 1 (10 000 μg?mL~(-1)). CONCLUSION: The minimum bactericidal concentration (MBC) indicated that the bactericidal activities of 1 occurred at concentrations higher than its growth inhibitory concentrations. Furthermore, the MBC: MIC ratio of 2 : 1 clearly demonstrated the in vitro bactericidal effect of 1 against S. aureus and S. epidermidis.
Femtosecond control of photoionization and photodissociation of sodium iodine molecules by laser pulse

Wave packet propagation techniques are used to find experimentally reliable laser parameters that yield optimal production.The photoionization and photodissociation dynamics of sodium iodine molecules are interpreted into several channels.Several frequencies are found to be suitable for NaI molecules during the photoionization and dissociation processes.Photon-dressed excited states and electron-dressed ionic continuum states facilitate the search for available laser parameters.
血管内大B细胞淋巴瘤的诊治

吴一龙:通过今天的病例讨论,我有几个体会。第一:诊断的问题。这个病人,诊断过程可做得更好’对于越是疑难的疾病,我们越要进行详细的讨论,请多个学科进行讨论,而不是请某一个科会诊后就决定,因为知识结构有局限性,尤其对于决定哪个部位来活检是非常重要的。第二,治疗的方法。在临床上,我们是否需要将每一个病例像做研究一样,对病理类型甚至分子生物学追踪到非常细,还是到一定程度就0K?这有一个度的问题。当我们追踪到一定程度的时候,对治疗决策已经没有影响了,我想,在临床上治疗就应该开始以免耽误病情,但科学问题需要继续探索,这是问题的另一面,可以留待临床研究去解决。第三,做不做移植,自体还是异基因?几位医生有不同的意见,如何达成共识?对于任何疾病的治疗,首先要考虑的是标准治疗方案是什么?然后考虑病人有什么特殊的地方。因此,总体上是应该按照指南来做,再在细节上作调整。
中期PET/CT评估对R-CHOP一线治疗弥漫大B细胞淋巴瘤患者预后的预测作用

总之,在利妥昔单抗联合化疗成为标准治疗方案的时代,治疗后中期PET/CT给DLBCL的疗效评估、预后评估及分层治疗带来了全新的挑战,考虑到PET/CT昂贵的价格,目前我们并不推荐治疗中期多次的PET/CT作为常规检查的一部分。另外临床医师在分析治疗中期PET/CT或治疗后PET/CT的结果时应谨慎,仅凭阳性的PET/CT结果尚不足以区分患者的预后并改变治疗策略,最客观的办法是在阳性部位行活检以证实肿瘤是否残留。目前,我们亟需大样本的前瞻性临床研究来进一步明确恶性淋巴瘤化疗中期PET/CT的价值。
人造血管旁路在下肢动脉硬化长段闭塞治疗中应用

目的:探讨人工血管在下肢动脉硬化闭塞症的治疗临床经验。方法:回顾性分析2006年6月~2011年6月收治的27例(27条肢体)下肢动脉硬化闭塞症患者实施人造血管动脉重建术资料。结果:术后25条下肢疼痛消失,2例肢体溃疡愈合,疼痛减轻,随访1~3年,2例术后6个月人工血管血栓形成,无死亡病例。结论:人造血管旁路术是治疗主髂、股胭动脉长段闭塞性疾病的主要治疗方法。
单只小鼠耳蜗总RNA提取方法

目的探索一种高效、简便的小体积组织RNA提取方法。方法取单只野生型BALB/c小鼠或GJB2条件敲除小鼠cCx26 loxp/loxp-Pax2 Cre/+(cCx26ko)P10/P18耳蜗膜迷路组织,采用与EP管底部体积、形状均相似的玻璃研磨棒在裂解液中进行组织破碎,提取RNA后用琼脂糖电泳、紫外分光光度计检测所提取RNA的质量和完整性及浓度。结果本实验单只小鼠耳蜗中获得的总RNA紫外光吸光值(260/280)均在1.9~2.1之间,电泳结果显示28 S和18 S的条带清晰度高,PCR产物扩增出的目的基因片断单一,说明其完整、质量高且纯度高。结论单只小鼠耳蜗总RNA的提取方法操作简便、成本低廉且相对安全和快速,提取效率较高,适合于小体积组织RNA的提取。
从脾胃论治支气管哮喘

脾胃为后天之本,气血生化之源,若脾胃运化水湿功能失调,水液停聚而生痰;痰伏于体内,"伏痰"遇感引触,痰随气升,气因痰阻,相互搏结,壅塞气道,而致痰鸣如吼,气息喘促发为哮喘。本文从脾虚生痰探讨从脾胃论治支气管哮喘的临床疗效。
《黄帝内经》情志相胜原理及方法探究

《内经》首次提出"百病生于气"的发病学观点,首创非药物性的"情志相胜法"。其原理建立在五行生克制化、阴阳消长互制、气机升降出入的中医基础理论之上,最经典的方法是依据五行生克理论,通过情志相互制约作用而形成的"悲胜怒"、"怒胜思"、"思胜恐"、"恐胜喜"、"喜胜忧"的五情相胜法。
糖皮质激素在急性呼吸窘迫综合征中的临床应用

急性呼吸窘迫综合征(acute respiratory distress syndrome,ARDS)是指由心源性以外的各种肺内外因素引起的急性、进行性缺氧性呼吸衰竭。ARDS是儿科重症监护病房的危重症之一,虽然患病率低,但病死率较高。随着保护性肺通气策略的实施、早期抗生素的应用、液体管理和营养支持等综合治疗手段的改进,ARDS的病死率较前有所下降,但总体病死率仍较高。糖皮质激素作为强有力的抗炎药物,在ARDS中的应用由来已久,其可在细胞和分子水平发挥抗炎作用,在ARDS发病机制的主要环节阻断和减少各种致病因素导致的肺部炎症反应。但是迄今对糖皮质激素的评价仍褒贬不一。本文对糖皮质激素在ARDS的应用基础、时机、剂量和疗程加以探讨。
Analysis of multiple scattering from two-dimensional dielectric sea surface with iterative Kirchhoff approximation

An iterative method in the Kirchhoff approximation is proposed for high frequency multiple electromagnetic scattering from two-dimensional dielectric sea surface. The multiple interaction of the scattering field is characterized with the corrected electromagnetic currents of the wind-driven sea surface. The actual surface currents are approximated with the iterative solution of the corrected currents. A newly developed sea spectrum, Elfouhaily spectrum, is utilized to build the sea surface model. The shadowing correction is improved by the Depth-Buffer algorithm. The validity of the iterative Kirchhoff approximation is verified by the agreement of backscattering coefficients with the measured data.
Radio-ligand receptor binding assav in vitro and animal biodistribution in vivo of ~(99)Tc~m-N-ethyl-N_2S_2-memantine as a potential NMDA receptor imaging agent

The pharmacologic characteristics of ~(99)Tc~m-N-ethyl-N_2S_2-memantine, an NMDA receptor imaging agent, was investigated. It was prepared by a one-step reaction from N-ethyl-N2S2-memantine. The affinity and specificity were determined by radio-ligand receptor binding assay (RRA). Biodistribution in vivo in mice was performed. The results showed that ~(99)Tc~m-N-ethyl-N_2S_2-memantine bound to a single site on NMDA receptor with a K_d of 584.32 nmol/L and a B_(max), of 267.05 nmol/mg. A competitive analysis showed that such specific binding could be inhibited by specific inhibitors of NMDA receptor, such as ketamine and (+)-MK-801. The biodistribution exhibited rapid uptake and favorable retention in mice brains. The major radioactivity was metabolized by the hepatic system. A two-compartment model of C = 4.49e~(-0.083t)+ 1.42e~(-0.0016t)was established, and the half life was 8.35 min in blood. In conclusion, the new radio-ligand ~(99)Tc~m-N-ethyl-N_2S_2-Memantine has a moderate affinity and specific binding to NMDA receptor, and can easily cross the blood-brain barrier (BBB). Therefore, it may be a potential NMDA receptor imaging agent.
Design and simulation of time-of-flight neutron reflectometer

In this paper, a time of flight neutron reflectometer model is proposed. According to the original objective inputting physical parameters and expectations, computer simulation was done by McStas package. With the open slit, neutron flux at sample position was about 1 × 10~5 n·cm 2·s~(-1), and the optimal resolution could reach 0.5%. The results show that the model has a good performance. The design of this model can be an instruction for neutron reflectometer construction or project analysis in the future.
新药滥用可能性的临床评估

对作用于中枢神经系统的药物,包括物质依赖戒断药物,在其研发中,新药滥用可能性的评估非常重要.本文就相关法规的要求进行了梳理,并对新药滥用可能性临床评估的范围、方法、注意事项等进行了归纳和讨论.
自制铝氧化剂的应用

化学氧化是铝及其合金重要的表面处理方法。铝氧化剂是一种新型的铝材或铝型材表面处理剂，具有槽液浓度低、性能稳定、生产效率高、成本低、配制简单、易操作等特点，能形成均匀的五色、彩虹色或浅绿色膜，且膜层耐高温、耐腐蚀、导电性能和与有机涂膜的结合力好，特点适于在铝及其合金表面生成转化膜，是涂漆、喷塑前处理的重要方法之一~[1,2]。为此，研制了3种铝氧化剂，含铝酸盐和铬酸盐2类，并将其用于铝材喷漆、喷塑的前处理。
A New Approach for Multi-Document Update Summarization

Fast changing knowledge on the Internet can be acquired more efficiently with the help of automatic document summarization and updating techniques. This paper describes a novel approach for multi-document update summarization. The best summary is defined to be the one which has the minimum information distance to the entire document set. The best update summary has the minimum conditional information distance to a document cluster given that a prior document cluster has already been read. Experiments on the DUC/TAC 2007 to 2009 datasets (http://duc.nist.gov/, http://www.nist.gov/tac/) have proved that our method closely correlates with the human summaries and outperforms other programs such as LexRank in many categories under the ROUGE evaluation criterion.
Queue Waiting Time Aware Dynamic Workflow Scheduling in Multicluster Environments

Workflows are prevailing in scientific computation. Multicluster environments emerge and provide more resources, benefiting workflows but also challenging the traditional workflow scheduling heuristics. In a multicluster environment, each cluster has its own independent workload management system. Jobs are queued up before getting executed, they experience different resource availability and wait time if dispatched to different clusters. However, existing scheduling heuristics neither consider the queue wait time nor balance the performance gain with data movement cost. The proposed algorithm leverages the advancement of queue wait time prediction techniques and empirically studies if the tunability of resource requirements helps scheduling. The extensive experiment with both real workload traces and test bench shows that the queue wait time aware algorithm improves workflow performance by 3 to 10 times in terms of average makespan with relatively very low cost of data movement.
Combining Committee-Based Semi-Supervised Learning and Active Learning

Many data mining applications have a large amount of data but labeling data is usually difficult, expensive, or time consuming, as it requires human experts for annotation. Semi-supervised learning addresses this problem by using unlabeled data together with labeled data in the training process. Co-Training is a popular semi-supervised learning algorithm that has the assumptions that each example is represented by multiple sets of features (views) and these views are sufficient for learning and independent given the class. However, these assumptions are strong and are not satisfied in many real-world domains. In this paper, a single-view variant of Co-Training, called Co-Training by Committee (CoBC) is proposed, in which an ensemble of diverse classifiers is used instead of redundant and independent views. We introduce a new labeling confidence measure for unlabeled examples based on estimating the local accuracy of the committee members on its neighborhood. Then we introduce two new learning algorithms, QBC-then-CoBC and QBC-with-CoBC, which combine the merits of committee-based semi-supervised learning and active learning. The random subspace method is applied on both C4.5 decision trees and 1-nearest neighbor classifiers to construct the diverse ensembles used for semi-supervised learning and active learning. Experiments show that these two combinations can outperform other non committee-based ones.
第393例——多发淋巴结肿大、血尿、蛋白尿和血肌酐进行性升高

病历摘要患者男，56岁。因血尿、蛋白尿、血肌酐(SCr)进行性升高3周入院。患者3周前受凉后发热，最高达39℃，伴干咳，无畏寒，自服头孢拉定及速效伤风胶囊治疗后出现茶色尿、尿泡沫增多，无尿量减少及腹胀，无关节疼痛、皮疹等表现，2周前就诊于外院，查外周血WBC 8．7 × 10~9/L，Hb 121g/L， PLT 438×10~(12)/L；尿蛋白3+，2．36 g/d；RBC满视野，80％变形；血Alb 23．4 g/L，SCr 223．9 μmol/L；抗链球菌溶血素O (ASO)、补体均正常；抗核抗体(ANA)1：3200阳性，抗中性粒细胞胞浆抗体(ANCA)阴性；B超示双肾增大：左肾长 14．0 cm，实质厚2．0 cm，右肾长14．3 cm，实质厚2．1 cm。考虑为急进性肾炎，行肾活检，肾脏病理直接免疫荧光： IgG++，C_(3c)++，沿肾小球毛细血管壁点线状沉积；光镜见 10个肾小球，其中2个小纤维性新月体伴球性硬化，3个细胞性新月体，4个小细胞性新月体，6个肾小球血管襻节段性纤维素样坏死；肾小球毛细血管基底膜中度弥漫性增厚、僵硬，伴钉突形成，上皮下可见嗜复红蛋白呈细颗粒状沉积。诊断：①新月体肾炎I型，建议进一步查抗肾小球基底膜 (GBM)抗体；②Ⅱ期膜性肾病。
老年期痴呆患者居家护理指导的效果

目的对社区老年期痴呆患者进行居家护理指导,并分析、评估其效果,进而探讨适合我国现状的老年期痴呆患者社区卫生服务模式。方法在海宁市筛选出符合中国精神障碍分类与诊断标准第3版(CCMD-3)的老年期痴呆患者108例(其中阿尔茨海默病84例,脑血管病所致精神障碍24例),用抽签法分为试验组和对照组各54例,试验组患者在一般社区卫生服务的基础上实施规范的居家护理,对照组患者给予一般的社区卫生服务。干预开始时、干预后3个月、6个月、12个月时,采用日常生活量表(ADL)分别对两组患者进行评估。结果干预后3个月、6个月、12个月两组ADL测评结果比较,试验组得分明显低于对照组,差异有统计学意义(p>.05)。结论实施居家护理的老年期痴呆患者衰退速度明显减慢。
大骨节病病区粮食中脱氧雪腐镰刀菌烯醇和硒元素检测报告

脱氧雪腐镰刀菌烯醇(deoxynivalenol，DON)又称呕吐毒素(vomitoxin，VT)，属单端孢霉烯族毒素，由镰刀菌 fusarium)产生~[1]。DON是全球性的、最常见的谷物真菌毒素污染物，广泛存在于粮食和动物饲料中，且难以降解，因此容易进入食物链引起人畜急慢性中毒~[2]。DON能够抑制生物大分子如DNA、RNA、蛋白质合成~[3]，具有明显的细胞毒性~[4-5]，对免疫功能也会造成影响~[6]，笔者在动物实验中发现DON可导致家兔膝关节软骨和滑膜的损伤~[7]，因此DON毒素可能与关节软骨类疾病的发生有关。大骨节病 (kaschin-beck disease，KBD)是主要侵害生长发育期儿童软骨的地方病，影响骨骼生长发育和关节活动，可造成终身残疾。另外，DON是我国胃癌、食管癌等恶性肿瘤高发区居民饮食中的主要污染霉菌毒素之一，其检出率和检出量都是最高的一种~[8-9]，笔者在以往的研究中也证实DON可导致早期癌前病变~[10]。笔者深入甘肃、山东的KBD病区，对DON和硒(Se)的含量做了检测，探讨DON与KBD之间的关联及Se的保护作用，现将结果报告如下。
挖掘信息提高GPS/INS导航精度的理论与方法研究

INS和GPS导航系统的组合已成为目前导航、测绘等多个领域研究的热点问题。从解决GPS/INS数据融合处理模型中存在观测信息严重不足的问题入手,提出了挖掘系统存在的隐含信息并对其附加约束的解决思路。
维奇风兰茎间幼嫩侧芽离体快繁培养

维奇风兰是兰科风兰属植物,本属约有221种,分布于热带非洲、南非与印度洋群岛,特别是马达加斯加岛为最大产地。维奇风兰由大彗星风兰交配Angraecum superbum,是人工杂交的大型风兰,每枝的花数在7~10朵,每株有5~10个花枝,苹果绿色花,花朵优雅,有飘逸的整体美感(廖贯名2008)。在广州的气候条件下,维奇风兰一般在10月抽花梗,12月至来年的3月开花,是一种极具节日赏花价值的春节花卉植物;其叶片互生、革质花,硬挺深绿,无花时也可作观叶植物。其繁殖方式主要是分株,速度很慢,难以满足市场的需求。采用茎间幼嫩侧芽繁殖可以在较短的时间内获得大量幼苗,为满足春节观花和观叶市场提供一条可能有效的途径。维奇风兰的组织培养和快速繁殖尚未见报道。
英国奥陶纪和志留纪笔石带的最新划分方案

最近Zalasiewicz等6位英国笔石研究学者发表了他们对英国奥陶纪和志留纪的笔石带划分表 (Zalasiewiczet al., 2009)(图1, 2)。英国的笔石带划分一百多年来一直是全球奥陶系和志留系的对比标准, 尽管目前英国在全球奥陶系年表中已不占重要份额, 但英国奥陶系和志留系笔石带仍不失其为重要的区域对比标准。
测绘工程专业摄影测量学实验教学改革探索

在分析同济大学及国内部分其他高校测绘工程专业摄影测量学实验教学现状的基础上, 确立同济大学摄影测量课程实验教学改革指导思想, 构建科学的摄影测量课程实验教学目标体系, 对实验教学内容进行改革;提出适合同济大学特点的摄影测量学实验教学实践方法, 对测绘工程专业摄影测量学实验教学改革进行探讨。
3D GIS技术在长城资源信息管理中的应用

应用3D GIS技术, 综合利用长城的专题和基础地理信息, 以Skyline软件为基础三维平台, 建立长城带状三维地表模型。以此为基础, 结合文物部门对长城资源“保护、利用、管理、研究”的需求, 设计和实现基于三维的长城资源部件化管理, 为长城资源信息的管理和展示提供有效、实用和快捷的工具。
灰色最小二乘支持向量机在滑坡变形预测中的应用

结合灰色系统思想与最小二乘支持向量机构成灰色最小二乘支持向量机, 根据目前灰色模型与最小二乘支持向量机结合的方法, 提出并联型、串联型和残差型三种预测模型的结构。将上述三种灰色最小二乘支持向量机模型用于对三峡库区石佛寺滑坡垂直位移进行预测, 模型精度和预测结果比较理想, 优于单一预测模型。试验表明:灰色最小二乘支持向量机可提高预测精度, 用于滑坡变形预测是有效可行的。
高职高专测绘类专业目录设置和调整研究

专业目录是国家指导专业办学的重要依据。高职高专测绘类专业的目录设置情况如何, 在实际运行中存在什么问题, 如何设置和调整专业目录等一系列问题会影响到高职高专测绘类专业的发展。从高职高专测绘类专业的设置情况入手, 分析当前高职高专专业目录的运行状况, 并给出专业目录调整建议和对策。
基于RS与GIS的广州市城市绿地景观空间分析

以Landsat卫星TM图像为数据源, 对广州市区绿地景观进行专题研究。在分析土地利用遥感监测技术流程的基础上, 通过实地考察对广州市绿地进行系统分类, 提取出所需信息, 并结合景观生态学理论对广州市区绿地的空间格局、功能演变进行定量分析, 提出广州市区绿地系统未来规划建设的一点意见。通过本研究旨在为RS、GIS和景观生态学领域的结合提供一定的参考, 并对生态研究提供一定的借鉴。
基于地面三维激光扫描数据的建筑物三维模型重建

用三维激光扫描技术获得的点云数据可构建建筑物的整体点云模型, 同时可根据点云模型进一步生成三角网模型、实体模型。结合实际工程阐述构建模型的方法, 同时对建筑物模型的作用作简要分析。
时变参数模型在边坡变形分析中的应用研究

为揭示边坡变形规律, 保证边坡安全, 采用数学模型对变形监测资料加以分析。边坡变形的时效性明显, 为提高灰色模型对边坡不同变形规律的适应性, 提高模型的拟合精度和预测能力, 对常规的灰色模型进行改进, 将常规灰色模型中的常量参数改变为随时间变化的动态参数, 由此建立时变参数灰色模型。实例分析结果表明, 时变参数模型具有更好的拟合和预测效果, 且适应不同变形规律的能力更强。
精密全站仪性能测试与分析

对多种典型观测条件下仪器的稳定性进行全面的测试和分析, 对陆地和水域两个大地四边形控制网的实测精度进行综合测试和分析, 并对仪器的夜间观测性能进行测试比较。结果表明, 在通常情况下仪器的稳定性良好, 达到了仪器标称的各项性能指标, 能够满足精密工程测量的需求。
基于EVB3.0实现三款全站仪与掌上电脑通讯

掌上电脑(PDA)具有存储量大、小巧方便、供电时间长等优点, 越来越广泛地被测绘人员采用。掌上电脑采用W indows CE系统、PDA软件在台式机上开发, 采用同步软件安装至PDA上运行。PDA与全站仪通讯技术成为软件开发的一个难点。编制了三款全站仪通讯程序, 供相关人员参考。
三维激光扫描系统在精准林业测量中的应用

提出利用Cyra三维激光扫描仪, 采用控制靶标与贴片相组合的方法对林业树种进行野外数据采集。针对Cyclone软件的不足, 基于三次样条插值函数的构造理论, 利用面向对象的高级编程语言实现了对树冠体积和表面积、树干材积的计算, 实现了对冠下高、冠下径、冠长、胸径、任意处直径等参数的量测, 克服了传统林业测量的局限性, 对林业测量技术的发展具有极其重要的意义。
Synthesis and Crystal Structure of 9-(2-Hydroxy-5-nitrophenyl)-9H-dibenzo[c,h]-2,7,10-trioxanthene-1,8-dione DMF Solvate

The title compound 9-(2-hydroxy-5-nitrophenyl)-9H-dibenzo[c,h]-2,7,10-trioxan-thene-1,8-dione DMF solvate (C_28H_20N_2O_9, M_r = 528.46) was synthesized and crystallized. The crystal belongs to the triclinic system, space group P_1 with a = 10.210(3), b = 10.698(4), c = 12.522(4) A, a= 92.214(6), β= 113.751(5), γ= 105.040(5)°, Z= 2, V= 1193.0(7) A~3, D_c = 1.471 g·cm3, μ(MoKa) = 0.112 mm~(-l), F(000) = 548, R = 0.0444 and wR = 0.1141 for 2667 observed reflections (I< 2σ(I)). X-ray analysis reveals that atoms C(1), C(2), C(3), C(4), C(5) and O(1) on the new 4H-pyran ring are slightly distorted, forming a half-chair conformation.
Hydrothermal Synthesis and Crystal Structure of a Lead(II) Polymer with a Two-dimensional Network Structure: [Pb_2(PDB)_2(phen)]_n·nH_2O

A new metal-organic complex [Pb_2(PDB)_2(phen)]_n·nH_2O(H_2PDB = pyridine-3,4dicarboxylic acid, phen = 1,10-phenanthroline) 1 has been hydrothermally synthesized and structurally characterized by elemental analysis, IR spectrum, TG and single-crystal X-ray diffraction. The compound crystallizes in triclinic, space group P_1 with a = 7.2472(5), b = 10.6966(8), c = 16.2376(12) A, a = 98.2960(10), β = 91.6430(10), γ = 97.4810(10)°, V = 1233.53(16) A~3, C_26H_16O_9N_4Pb_2, M_r = 942.81, D_c = 2.538 g/cm_3, μ(MoKa) = 13.697 mm~(-l), F(000) = 872, Z= 2, the final R = 0.0247 and wR = 0.0654 for 3886 observed reflections (I< 2σ(I)). In the crystal structure, the Pb(l) atom is six-coordinated with four carboxylate oxygen atoms from three different PDB ligands and two nitrogen atoms from phen ligand, showing a distorted octahedral geometry; the Pb(2) atom is four-coordinated with four carboxylate oxygen atoms from four different PDB ligands, showing a distorted tetrahedral geometry. It exhibits a three-dimensional supramolecular network structure formed by hydrogen bonds and π-π interactions.
New loop pairing criterion based on interaction and integrity considerations

Loop pairing is one of the major concerns when designing decentralized control systems for multivariable processes. Most existing pairing tools, such as the relative gain array (RGA) method, have shortcomings both in measuring interaction and in integrity issues. To evaluate the overall interaction among loops, we propose a statistics-based criterion via enumerating all possible combinations of loop statuses. Furthermore, we quantify the traditional concept of integrity to represent the extent of integrity of a decentralized control system. Thus, we propose that a pairing decision should be made by taking both factors into consideration. Two examples are provided to illustrate the effectiveness of the proposed criterion.