mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Acacia mangium Willd: benefits and threats associated with its increasing use around the world

Background: Acacia mangium, a fast-growing tree native to parts of Indonesia, Papua New Guinea and Australia, has been cultivated outside its native environment and introduced into humid tropical lowland regions of Asia, South America and Africa over the last few decades. It is a multipurpose tree used in agroforestry, forestry and for restoration of degraded lands. It is also highly invasive in many regions where it has been introduced outside its native range. This paper reviews evidence of its obvious benefits and its negative impacts on biodiversity. Methods: A literature review on Australian acacias and especially on A. mangium was undertaken to highlight both benefits and threats associated with their increasing worldwide use outside their native ranges. Results: Through N2 fixed from the atmosphere, A. mangium improves soil fertility, especially by increasing N status and soil C accretion when introduced to N-limited areas; it thus has the potential to restore nutrient cycling in degraded systems. No studies have, however, been done to assess the effectiveness of A. mangium in restoring biodiversity of degraded lands. Most Australian acacias have traits that facilitate invasiveness, and 23 species have been recorded as invasive to date. A. mangium has been reported as invasive in Asia, Indonesia, Pacific Islands, Indian Ocean Islands, southern Africa and Brazil. Research on other invasive Australian acacias in several parts of the world has elucidated the types of impacts that are likely in different types of ecosystems and key options for mitigating impacts. Conclusions: A. mangium has the potential to restore nutrient cycling in degraded systems, but is highly invasive wherever it is planted. Many parts of the world have a large invasion debt for this species. Experience with other invasive acacias around the world suggests a suite of interventions that could be used to reduce invasions and mitigate impacts. Careful risk assessments should be undertaken prior to any new plantings of this species.
Isogeometric analysis of coupled thermo-elastodynamic problems under cyclic thermal shock

The isogeometric analysis (IGA) method was extended for the solution of the coupled thermoelastodynamic equations. The dimensionless formulation was accepted in discretization of the uncoupled and coupled thermoelasticity equations and the Generalized Newmark method was used in the time integration procedure. First, the performance of the proposed method was verified against a two-dimensional benchmark example subjected to constant thermal shock with available exact analytical solutions. Then a two-dimensional half-space benchmark example under thermal shock was solved. Finally, cyclic thermal shock (CTS) loading was applied on the half-space problem. The results dedicated that IGA can be used as a suitable approach in the analysis of the general thermomechanical problems.
Visual tracking using discriminative representation with ℓ_2 regularization

In this paper, we propose a novel visual tracking method using a discriminative representation under a Bayesian framework. First, we exploit the histogram of gradient (HOG) to generate the texture features of the target templates and candidates. Second, we introduce a novel discriminative representation and ℓ_2-regularized least squares method to solve the proposed representation model. The proposed model has a closed-form solution and very high computational efficiency. Third, a novel likelihood function and an update scheme considering the occlusion factor are adopted to improve the tracking performance of our proposed method. Both qualitative and quantitative evaluations on 15 challenging video sequences demonstrate that our method can achieve more robust tracking results in terms of the overlap rate and center location error.
Planning and analysis of the demonstration project of the MVDC distribution network in Zhuhai

The DC distribution system is an important development direction of the distribution system, which can improve the reliability and the quality of the power supply, and support the new energy, the energy storage, the electric vehicles, and the flexible access of AC and DC loads to grid. To realize the demonstration application of the DC distribution technology, China's first demonstration project of the medium voltage DC distribution network will be built in Zhuhai, Guangdong Province to support the construction of the city energy internet. First, this paper analyzes the demand of the DC distribution network project, and puts forward the construction content and construction target. Then, it designs and analyzes the electrical connection mode, system operation mode, and startup and shutdown mode of the DC distribution network, and proposes the overall project construction plan. Finally, it conducts the specific project design and analysis, which mainly include the selection of equipment such as inverters, DC transformers and DC circuit breakers, the design and analysis of the DC control and protection system, the design and analysis of the overvoltage protection and the configuration scheme of the lightning arrester, and analysis of the system transient characteristics. The design and analysis of the engineering program is a combination of China's distribution network engineering practice and technical characteristics, which lays a solid foundation for the advancement of the DC power distribution technology in China, and has reference value and demonstration effect for the design and construction of other projects.
The distribution and sources of polycyclic aromatic hydrocarbons in shallow groundwater from an alluvial-diluvial fan of the Hutuo River in North China

This paper has investigated the concentration and distribution of polycyclic aromatic hydrocarbons in shallow groundwater from an alluvial-diluvial fan of the Hutuo River in North China. Results show that the concentration levels of 16 priority polycyclic aromatic hydrocarbons range from 0 to 92.06 ng/L, do not conform to drinking water quality standards in China (GB 5749- 2006). However, the concentration figures of priority polycyclic aromatic hydrocarbons are much lower than that of other studies conducted elsewhere in China. In addition, highly-concentrated polycyclic aromatic hydrocarbons (50–92 ng/L) are fragmentarily distributed. The composition of polycyclic aromatic hydrocarbons from this study indicates that low molecular polycyclic aromatic hydrocarbons are predominant in groundwater samples, medium molecular compounds occur at low concentrations, and high molecular hydrocarbons are not detected. The polycyclic aromatic hydrocarbon composition in groundwater samples is basically the same as that of gaseous samples in the atmosphere in this study. Therefore, the atmospheric input is assumed to be an important source of polycyclic aromatic hydrocarbons, no less than wastewater discharge, adhesion on suspended solids, and surface water leakage. Ratios of specific polycyclic aromatic hydrocarbons demonstrate that they mainly originate from wood or coal combustion as well as natural gas and partially from petroleum according to the result of principal component analysis. On the whole, conclusions are drawn that the contamination sources of these polycyclic aromatic hydrocarbons are likely petrogenic and pyrolytic inputs. Future investigations by sampling topsoil, vadose soil, and the atmosphere can further verify aforementioned conclusions.
Decorative near-infrared transmission filters featuring high-efficiency and angular-insensitivity employing 1D photonic crystals

We present a new scheme for visibly-opaque but near-infrared-transmitting filters involving 7 layers based on one-dimensional ternary photonic crystals, with capabilities in reaching nearly 100% transmission efficiency in the near-infrared region. Different decorative reflection colors can be created by adding additional three layers while maintaining the near-infrared transmission performance. In addition, our proposed structural colors show great angular insensitivity up to ±60° for both transverse electric and transverse magnetic polarizations, which are highly desired in various fields. The facile strategy described here involves a simple deposition method for the fabrication, thereby having great potential in diverse applications such as image sensors, anti-counterfeit tag, and optical measurement systems.
Motif-mediated Au_(25)(SPh)_5(PPh_3)_(10)X_2 nanorods with conjugated electron delocalization

We developed a general and effective strategy to afford rod-like [Au_(25)(SPh)_5(PPh_3)_(10)X_2]X_2 (X = Cl/Br) nanoclusters, capped by conjugated delocalized pπ electron mediated ligands. The detailed atomic structure of these materials was resolved by synchrotron radiation X-ray diffraction (SRXRD) combined with electrospray ionization mass spectrometry (ESI-MS) and UV-vis analyses. The Au_(17)(SR)_3(PPh_3)_6X_2 minimum asymmetric unit, with exposed Au atoms at the center, can serve as an important model to understand the transformation of homogold nanoclusters into alloy nanoclusters. The conjugated delocalized pπ electrons of the thiolate ligands can effectively tune the electronic properties of the Au_(25) kernel, as qualitatively evidenced by the energy gaps measured by UV-vis experiments and density functional theory (DFT) calculations. The delocalized electrons distinctly flow to the orbitals of the Au_(25) kernel via the S atoms of the aromatic thiolates. The ESI-MS analysis indicates that Au_3 clusters are formed during the etching reactions, which provide an opportunity to gain insight into the intriguing conversion pathway of the Au_n(PPh_3)_mX_y precursor to the final Au_(25) nanorods. Finally, the thiophenol-protected Au_(25) nanorods, immobilized on activated carbon, show good catalytic activity in the aerobic oxidation of glucose to gluconic acid (74% glucose conversion and 100% selectivity for gluconic acid), much higher than that of the aliphatic Au_(25) analogue. The Au_(25)(SPh)_5(PPh_3)_(10)X_2 catalyst yields a turnover frequency (TOF) of 13.5 s~(-1), higher than that of commercial catalysts such as Pd/activated carbon (AC) and Pd-Bi/AC. The insight obtained from this study will support the development and design of efficient nanogold catalysts for special oxidation reactions.
Solution-processed highly adhesive graphene coatings for corrosion inhibition of metals

The corrosion of metals can be induced by different environmental and operational conditions,and protecting metals from corrosion is a serious concern in many applications.The development of new materials and/or technologies to improve the efficiency of anti-corrosion coatings has attracted renewed interest.In this study,we develop a protective coating composed of a bilayer structure of reduced graphene oxide (RGO)/graphene oxide (GO) applied to Cu plates by spray-coating and subsequent annealing.The annealing of the GO/Cu plates at 120 °C produces a bilayer structure of RGO/GO by the partial reduction of the spray-coated GO layer.This induces superior corrosion resistance and adhesion strength compared to those of GO/Cu and RGO/Cu plates because of the hydrophobic nature of the RGO surface exposed to the surroundings and the formation of Cu–O bonds with the O-based functional groups of GO.This approach provides a viable and scalable route for using graphene coatings to protect metal surfaces from corrosion.
Importance-driven approach for reducing urban radiative exchange computations

In the context of large scale urban heat transfer simulation, the prediction of radiative flux at short and long wave spectra is a step necessary to obtain accurate results. From a computational perspective, this task is expensive because realistic conditions require calculations in many sensors, considering multiple radiation bounces, and evaluating many hundred daylighting conditions. Radiosity-based approaches are adequate methods for processing the large number of diffuse surfaces that are usually present in city models. However, the high memory consumption of these algorithms turns them inefficient for handling big geometries, and therefore ray tracing techniques are commonly used. In this article we present a study on using the importance concept to improve the performance of radiosity calculations at the urban scale. The algorithm is able to consider diffuse and specular materials, and it proves to be a viable alternative to ray tracing. Since most of the information contained in big city models is not needed for simulating a selected zone of interest, the computational requirements can be reduced drastically. Several experiments are conducted to test the approach, and promising results are reported.
Data mining based framework to identify rule based operation strategies for buildings with power metering system

Operation strategies influence the building energy efficiency. In order to enhance the building energy efficiency, it’s necessary to adopt proper operation strategies on building equipment. Thus, the identification of existing operation strategies is necessary for the improvement of operation strategies. A data mining (DM) based framework is proposed in this paper to automatically identify the building operation strategies. The framework includes classification and regression tree (CART), and weighted association rule mining (WARM) method, targeting at three types of rule based control strategies: on/off control, sequencing control (for equipment of the same type), and coordinated control (for equipment of different types). The performance of this framework is validated with power metering system data and manual identification results based on on-site survey of three buildings in Shanghai. The validation results suggest that the proposed framework is capable of identifying building operation strategies accurately and automatically. Implemented on the original software named BOSA (Building Operation Strategy Analysis), this framework is promising to be used in engineering field to enhance the efficiency of building operation strategy identification work.
Investigation on the energy performance of a novel semi-transparent BIPV system integrated with vacuum glazing

The development of vacuum glazed windows in recent decades has provided a foreseeable energy saving opportunity in the design of low-energy consumption buildings and the application of building integrated photovoltaic (BIPV) has experienced rapid development for application in buildings. This paper reports our investigations on the combinations of the vacuum glazing and BIPV integration. Semi-transparent photovoltaic windows can convert solar energy into electricity, but most of absorbed solar heat is transferred into indoor environment which becomes additional cooling load. The proposed vacuum photovoltaic insulated glass unit (VPV IGU) in this paper combines vacuum glazing and solar photovoltaic technologies, which can utilize solar energy and reduce cooling load of buildings at the same time. Various experiments were conducted to evaluate the thermal performance and determine the key characteristics of the VPV IGU in this study. It was found that the VPV IGU can achieve very low total heat gain coefficient (U-value) of around 1.5 W/(m~2 K) and block most of undesired solar radiation from penetrating through the window. Compared with a common double-pane glass sheet, the vacuum PV glazing can maintain the indoor environment at a relatively low temperature due to its excellent thermal insulation performance in summer. A detailed simulation study has been conducted by EnergyPlus and Berkeley Lab WINDOW. The simulation work has indicated that the cooling load can be reduced by 14.2% by a south-oriented VPV IGU compared with common glazing products while power generation is not compromised compared with normal BIPV systems. The results show that the application of the VPV IGU has a huge energy saving potential and can minimize the drawback of common PV insulating glass units.
达芬奇机器人手术系统辅助直肠癌Miles术后反复并发内疝性肠梗阻的诊断与治疗

达芬奇机器人手术系统辅助直肠下段癌Miles术,优势明显,能在狭小的空间中获得灵活的操作和清晰的视野,已经在多个国家和地区得到开展[1]。与传统手术一样,达芬奇机器人手术系统术后腹腔内可形成两个空隙:腹壁造瘘段结肠与左侧腹壁之间的空隙,若空隙较大或缝闭不良则可形成内疝;盆底腹膜关闭不当或术后腹胀所致盆底腹膜裂开,形成较大的间隙,松弛的肠管进入即可造成腹内疝[2]。腹内疝是一种特殊类型的肠梗阻,临床少见,诊断治疗不及时,极易发生肠绞窄、肠坏死,导致脓毒血症、感染性休克,后果严重[3]。临床医师应加强对该病的认识,有腹部手术史,以肠梗阻征象为表现时,不应仅考虑粘连性肠梗阻的诊断,还应警惕腹内疝的可能[4]。腹部增强CT检查为首选影像学检查方法,特别是增强扫描后进行多角度图像重建对诊断该病有一定优势[5]。CT检查增强扫描可以发现典型漩涡征等肠系膜血管扭转表现时,可以明确诊断小肠扭转、梗阻;如增强扫描小肠壁未有强化,提示小肠系膜血管阻塞,考虑缺血坏死可能[6]。因此,当患者有肠梗阻的表现,症状与体征不符而常规影像学检查无阳性发现时,CT检查显得尤其重要,可发现肠管解剖位置变异与血运情况的改变,为小肠扭转及腹内疝的早期诊断提供有力证据[7]。诊断性腹腔穿刺为血性腹腔积液,高度怀疑内疝性肠梗阻,应急诊行剖腹探查[8];只有及时解除梗阻,才能避免肠坏死及术后并发症的发生[9]。目前认为机器人辅助直肠癌手术后并发症发生率与传统手术比较,差异无统计学意义[1()]。本例患者术后反复并发内疝性肠梗阻,主要由于腹壁造瘘段结肠与左侧腹壁之间的距离较远,缝闭不良,客观上造成空隙过大,为腹内疝的形成埋下了隐患,临床医师应吸取教训。本例患者由于两次都是急诊手术,处于休克状态,患者完成手术及放化疗后,体质较弱,不能耐受重新造口;仅行肠粘连松解+腹内嵌顿疝复位+肠切除后吻合术,手术疗效满意。
Contribution of the FPGAs for Complex Control Algorithms:Sensorless DTFC with an EKF of an Induction Motor

In a conventional direct torque control (CDTC) of the induction motor drive,the electromagnetic torque and the stator °ux are characterized by high ripples.In order to reduce the undesired ripples,several methods are used in the literature.Nevertheless,these methods increase the algorithm complexity and dependency on the machine parameters such as the space vector modulation (SVM).The fuzzy logic control method is utilized in this work to decrease these ripples.Moreover,to eliminate the mechanical sensor the extended kalman filter (EKF) is used,in order to reduce the cost of the system and the rate of maintenance.Furthermore,in the domain of controlling the real-time induction motor drives,two principal digital devices are used such as the hardware (FPGA) and the digital signal processing (DSP).The latter is a software solution featured by a sequential processing that increases the execution time.However,the FPGA is featured by a high processing speed because of its parallel processing.Therefore,using the FPGA it is possible to implement complex algorithms with low execution time and to enhance the control bandwidth.The large bandwidth is the key issue to increase the system performances.This paper presents the interest of utilizing the FPGAs to implement complex control algorithms of electrical systems in real time.The suggested sensorless direct torque control using the fuzzy logic (DTFC) of an induction motor is successfully designed and implemented on an FPGA Virtex 5 using xilinx system generator.The simulation and implementation results show proposed approach0s performances in terms of ripples,stator current harmonic waves,execution time,and short design time.
口服复方聚乙二醇电解质散对肠道清洁质量的影响因素分析

目的探讨口服复方聚乙二醇电解质散对肠道清洁质量的影响因素。方法选取2016年3月至2016年11月住院行结肠镜诊疗且符合入排标准的155例患者,采用Boston肠道评分量表对每位患者左半结肠、横结肠、右半结肠及全结肠肠道清洁度进行评分,并对患者身高、体重、年龄、检查前一天饮食、检查当天服复方聚乙二醇电解质散的剂量、时间、总时长、首次排便时间、排便总次数、服药-首次排便间隔时长、服药-进镜间隔时长等因素进行记录,采用累积比数logit模型、趋势卡方检验进行统计分析,以P<0.05为差异有统计学意义。结果①严格控制饮食者左半结肠(χ~2=6.647,P=0.010)、横结肠(χ~2=8.859,P=0.003)、右半结肠(χ~2=4.058,P=0.044)、全结肠(χ~2=6.264,P=0.012)清洁度相比限制饮食者清洁度评分较高;②检查当日排便>10次者左半结肠清洁度评分较高(χ~2=4.209,P=0.040),但右半结肠与横结肠的清洁度评分差异无统计学意义;③患者服药-进镜间隔时长≤500 min者左半结肠(χ~2=5.046,P=0.025)、横结肠(χ~2=4.127,P=0.042)、右半结肠(χ~2=6.562,P=0.010)、全结肠(χ~2=5.507,P=0.019),清洁度评分均较高;④服药-首次排便间隔≤60min者右半结肠的清洁度评分较高(χ~2=3.937,P=0.047),左半结肠与横结肠的清洁度评分差异则无统计学意义。结论患者饮食控制情况、服用复方聚乙二醇电解质散后到首次排便时间、检查当日排便总次数、服药-进镜时长均对肠道清洁质量有影响,应制定个体化、规范化的肠道准备方案,加强对排便的观察与记录,提高肠道清洁质量。
行进中的中国科技评价制度改革

改革开放40年来,中国科技影响力快速提升,举世瞩目。例如,近年来中国科技投入保持了年均10%的高速增长,2007-2017年的10年间SCI论文累计发表数量及引文量均已居世界第二,等等。但是人们也看到,中国科技的发展越来越受到以数论文、专利及人才“帽子”等为标志的量化评价的制约,这种过度量化的评价导向已严重影响和破坏了正常的学术生态。由此,中国科技评价处在迫切需要转变发展道路的关键时刻,即抑制过度量化评价倾向、发展更加关注科技质量的评价制度和方法,以保证能够有更多原创性科学与技术的突破性成果产出,实现从“量变到质变”的转化。
相关性与因果关联

传统的相关性分析可在一定程度上为深入挖掘关键科学问题提供可能的初步依据.然而,研究者必须正视相关性与因果关联的辩证关系,即“相关性不意味着因果关联”而“缺乏相关性亦不意味着缺乏因果关联”.因此,在对相关性研究结果进行表述和推断时需持谨慎态度.在处理复杂的动态系统时,应不局限于静态的相关性分析手段,可合理选择经验动态建模方法对耦合系统中变量间的因果关联进行分析,从而避免做出误导性的结论.
Effects and mechanisms of innate immune molecules on inhibiting nasopharyngeal carcinoma

To the Editor: The nasopharyngeal epithelium is frequently exposed to various harmful carcinogens. When the nasopharyngeal mucosa is damaged, local inflammation is induced.[1] Chronic inflammation of the nasopharyngeal epithelium may eventually evolve into nasopharyngeal carcinoma (NPC). While the mucus secreted by the nasopharyngeal epithelium forms the body’s primitive immune protection barrier as it contains a series of proteins and peptides that can sense, bind, degrade and remove various harmful substances. Lactotransferrin (LTF)[2] and bactericidal/permeability-increasing (BPI) protein family members[3] are an important component of the innate immune protection barrier.
达托霉素治疗高龄重症复杂性皮肤及软组织感染一例

皮肤和软组织感染是最常见的感染之一,其中耐甲氧西林金黄色葡萄球菌(MRSA)的发病率逐年上升。达托霉素是一类新颖的环脂肽类抗生素,主要用于治疗MRSA所致的皮肤和软组织感染,在高龄和重症患者中应用的经验国内报道并不多,本例患者达托霉素应用剂量和疗程高于通常推荐,并未出现药物不良反应,治疗结果表明该方案安全有效。
Absorption and Emission Spectra of p-Phenylbenzoyl Methanthiol: Methanol Effect Based on M06-2X Calculations

The absorption and emission spectra, as well as the photolysis mechanism of p-phenylbenzoyl methanthiol in methanol and in gas phase were elucidated in detail based on the molecular structures of the ground states, excited states and their spectroscopic characters. The TD-M062X calculations demonstrate that the S1 state in gas phase will decompose into SH and p-phenylbenzoyl radical via a barrierless process, but the T1 and T2 do not photolyze. By adding 1 and 2 methanol molecules onto p-phenylbenzoyl methanthiol, the CPCM model can perfectly describe the solvation effects of methanol. Methanol may stabilize the excitation states, but also protects the resulting radical products from recombination.
伴自身免疫性血细胞减少的B~-联合免疫缺陷病7例

目的探讨伴自身免疫性血细胞减少的B~-联合免疫缺陷病患儿的临床及免疫特征。方法选择2012年9月至2016年5月在首都医科大学附属北京儿童医院住院的7例患儿,经基因突变分析证实为B~-联合免疫缺陷病,描述其临床及免疫特征。结果患儿均具有淋巴细胞减少[ (0.39~2.91)×10~9/L]。RAG1突变的病例1、2、3、5中,病例1、5的B淋巴细胞比例明显降低(分别为0.003和0.028)伴CD4~+T淋巴细胞比例降低,且病例1的B淋巴细胞比例既往正常,提示进展性病程;病例2、3的CD3~+T淋巴细胞、CD4~+T淋巴细胞比例明显降低(分别为0.131、0.039,0.169、0.149)伴B淋巴细胞比例正常。NHEJ1突变的病例4患儿B淋巴细胞比例明显降低(0.001)。LIG4突变的病例6、7患儿B淋巴细胞比例明显降低(分别为0.001和0.004),且病例6患儿B淋巴细胞比例既往正常,提示进展性病程。患儿均具有自身免疫性血细胞减少(红系和/或粒系和/或巨核系)。结论B~-联合免疫缺陷病患儿易出现自身免疫性血细胞减少。
Formation mechanism of yolk–shell LaMnO_3 microspheres prepared by P123-template and oxidation of NO

The yolk-shell LaMnO_3 perovskite microspheres were fabricated by a novel, simple and mild soft template approach. A series of template-P123 concentrations (0-6.12 mmol·L~(-1)) were employed to optimize the most complete spheres. When the concentration of P123 is 3.0 mmol·L~(-1), the obtained yolk-shell microspheres with a diameter of 200-700 nm were constructed by nanoparticles. The possible formation mechanism of the yolk-shell microspheres was revealed step by step via XRD, SEM, TEM, EDS and HRTEM. Molecules of P123 were suitably mixed with solvents for double shelled vesicles through self-assembly, which interacted with metal complexes to form P123-metal vesicles. After the removal of P123 and citric acid by calcination at 700 °C, the yolk-shell LaMnO_3 microspheres with through-channels were obtained. Throughchannels on the surface were due to citric acid and the solid core was attributed to the shrink of inner vesicles. Prepared yolk-shell microsphere samples possessed a larger surface area and a higher maximum NO conversion value of 78% at 314 °C for NO oxidation, compared with samples without the yolk-shell structure.