mlsa-iai-msu-lab/ru_sci_bench_zho_cite_reranking huggingface dataset:
Factors effecting aluminum speciation in drinking water be laboratory research

Effects of aluminum on water distribution system and human health mainly attribute to its speciation in drinking water. Laboratory experiments were performed to investigate factors that may influence aluminum speciation in water supply system. The concentration of soluble aluminum and its transformation among other aluminum species were mainly controlled by kinetics processes of related reactions. Total aluminum concentration had a notable effect on the concentrations of mononuclear and soluble aluminum in the first 4 day; while, when the reaction time was above 4 day, its effect became weak. At pH above 7.50, both fluoride and orthophosphate had little effect on aluminum speciation; while, when the solution pH was below 7.50, the concentrations of mononuclear and soluble aluminum were proportional to the concentration of fluoride and inversely proportional to the concentration of orthophosphate. Both mononuclear and polynuclear silicic acids could complex with mononuclear aluminum by forming soluble aluminosilicates. In addition, the adding sequence of orthophosphate and aluminum into drinking water would also affect the distribution of aluminum species in the first 4 day. In order to minimize aluminum bioavailability in drinking water, it was suggested that orthophosphate should be added prior to coagulant process, and that the concentrations of fluoride and silicic acids be controlled below 2.0 and 25 mg/L, respectively, prior to the treatment. The solution pH in coagulation and filtration processes should be controlled in the range of 6.50-7.50.
Fractionation of heavy metals in shallow marine sediments from Jinzhou Bay, China

This work investigated the distribution and speciation of Cd, Cu, Pb, Fe and Mn in the shallow sediments of Jinzhou Bay, Northeast China, which has been heavily contaminated by nonferrous smelting activities. The concentrations of Cd, Cu and Pb in sediments were found to be 100, 13 and 7 times higher than the national guideline (GB 18668-2002). Sequential extraction test showed that 39%-61% of Cd are exchangeable fractions, indicating that Cd  in the sediments poses a high risk to local environments, While Cu and Pb are at moderate risk levels. According to the relationships between percentage of metal speciation and total metals concentration, it can be concluded that the distribution of Cd, Cu and Pb in some geochemical fractions were dynamic in the process of pollutants migration and the stability of metals in sediments of Jinzhou Bay decreased in the order of Pb > Cu > Cd.
Microwave enhanced chemical reduction process for nitrite-containing wastewater treatment using sulfaminic acid

High-concentration nitrite-containing wastewater that presents extreme toxicity to human health and organisms is difficult to be treated using traditional biological process. In this study, a novel microwave-enhanced chemical reduction process (MECRP) using sulfaminic acid (SA) was proposed as a new manner to treat such type of wastewater. Based on lab-scale experiments, it was shown that 75%-80% nitrite (NO_2~-) could be removed within time as short as 4 min under 50 W microwave irradiation in pH range of 5-10 when molar ratio of SA to nitrite (SA/NO_2~-) was 0.8. Pilot-scale investigations demonstrated that MECRP was able to achieve nitrite and chemical oxygen demand (COD) removal with efficiency up to 80% and 20%, respectively under operating conditions of SA concentration 80 kg/m~3, SA/ NO_2~- ratio 0.8, microwave power 3.4 kW, and stirring time 3 min. Five-day biological oxygen demand (BOD_5)/COD value of treated effluent after MECRP was increased from 0.05 to 0.36 (by 620%), which clearly suggested a considerable improvement of biodegradability for subsequent biological treatment. This study provided a demonstration of using microwave irradiation to enhance reaction between SA and nitrite in a short time, in which nitrite in wastewater was completely converted into nitrogen gas without leaving any sludge and secondary pollutants.
Dynamics of dissolved organic carbon in the mires in the Sanjiang Plain, Northeast China

Mires in boreal area had proved to be an important dissolved organic carbon (DOC) reserve for the sensitivity to climate change and human interfering. The study was focused on the temporal and spatial dynamics and controlling factors of DOC in a seasonally-waterlogged (SLM) and perennially-waterlogged mire (PLM) in the Sanjiang Plain, Northest China. In the two mires, DOC concentrations in both surface water and upper soil strata experienced pronounced seasonal variation. DOC concentrations in the surface waters were the greatest and averagely 47.82 and 34.84 mg/L in SLM and PLM,whereas that in soil water at 0.3-m depth  had little difference (20.25 mg/L for SLM and 26.51 mg/L for PLM). Results revealed that DOC concentrations declined 5-8 times vertically from the surface down to groundwater. DOC in the groundwater only was in a very small part with the average concentration of 5.18 mg/L. In relation to the surface water, DOC concentrations varied positively with temperature just before 8 August, and only in early spring and later autumn DOC concentrations exhibited identifiable spatial trends along with standing water depths in PLM. It was supposed that the influences from standing water depth took effect only in conditions of low temperature, and temperature should be the most powerful factor controlling DOC dynamics in the mires. Redox potential (Red) showed negative relationship with DOC values while total nitrogen (TN) and the majority of free ions in the soil solution exhibited no relationship. High soil TOC/TN ratio and low redox potentials also led to DOC accumulation in the mires in the Sanjiang Plain.
Rainwater utilization and storm pollution control based on urban runoff characterization

The characteristics of urban runoffs and their impact on rainwater utilization and storm pollution control were investigated in three different functional areas of Zhengzhou City, China. The results showed that in the same rain event the pollutant loads (chemical oxygen demand (COD) and total suspended solids (TSS)) in the sampling areas were in the order of industrial area > commercial area > residential area, and within the same area the COD and TSS concentrations of road runoffs were higher than those of roof runoffs. The first flush effects in roof and road runoffs were observed, hence the initial rainwater should be treated separately to reduce rainwater utilization cost and control storm pollution. The initial roof rainfall of 2 mm in residential area, 5 mm in commercial area and 10 mm in industrial area, and the initial road rainfall of 4 mm in residential area and all the road rainfall in commercial and industrial areas should be collected and treated accordingly before direct discharge or utilization. Based on the strong correlation between COD and TSS (R~2, 0.87-0.95) and the low biodegradation capacity (biochemical oxygen demand BOD_5/COD < 0.3), a sedimentation process and an effective filtration system composed of soil and slag were designed to treat the initial rainwater, which could remove over 90% of the pollutant loads. The above results may help to develop better rainwater utilization and pollution control strategies for cities with water shortages.
Assessing the impact of fungicide enostroburin application on bacterial community in wheat phyllosphere

Fungicides have been used extensively for controlling fungal pathogens of plants. However,little is known regarding the effects that fungicides upon the indigenous bacterial communities within the plant phyllosphere. The aims of this study were to assess the impact of fungicide enostroburin upon bacterial communities in the wheat phyllosphere. Culture-independent methodologies of 16S rDNA clone library and 16S rDNA directed polymerase chain reaction with denaturing gradient gel electrophoresis (PCR-DGGE) were used for monitoring the change of bacterial community. The 16S rDNA clone library and PCR-DGGE analysis both confirmed microbial community of the wheat plant phyllosphere were predominantly of the γ-Proteobacteria phyla. Results from PCR-DGGE analysis indicated a significant change in bacterial community structure within the phyllosphere following fungicide enostroburin application. Bands sequenced within control cultures were predominantly of Pseudomonas genus, but those bands sequenced in the treated samples were predominantly strains of Pantoea genus and pseudomonas genus. Of interest was the appearance of two DGGE bands following fungicide treatment, one of which had sequence similarities (98%) to Pantoea sp. which might be a competitor of plant pathogens. This study revealed the wheat phyllosphere bacterial community composition and a shift in the bacterial community following fungicide enostroburin application.
心肌病心力衰竭的中医辩证分型与治疗效果的相关性

目的:探讨心肌病心力衰竭中医辩证分型与中西医结合治疗效果的相关性.方法:对心肌病心力衰竭进行中医辩证分型:心气不足证、气阴两虚证、心阳亏虚证、阴阳俱损证.通过各证型临床症状体征疗效、心功能变化情况及超声心动图指标的改变观察,探讨标准治疗的基础上加以治心方对心肌病心衰患者缓解症状、改善心功能、提高生活质量、改善预后的影响.结果:心肌病心力衰竭的治疗与中医辩证各证有相关性,疗效依次为心气不足证＞气阴两虚证＞心阳亏虚证＞阴阳俱损证;心肌病心衰程度依次为心气不足证＞气阴两虚证＞心阳亏虚证＞阴阳俱损证.结论:该分型有一定的现代医学研究依据,为中医药治疗心衰提供客观科学依据.
根腐病菌粗毒素胁迫下菘蓝体细胞无性系生理指标的初步研究

目的:从生理水平初步鉴定宽叶菘蓝体细胞无性系植株的抗病突变体.方法:以一定浓度的根腐病病原菌粗毒素侵染过的同一无性系菘篮幼叶为实验材料,采用聚丙烯酰胺凝胶电泳技术分析POD和SOD同工酶的谱系,同时测定其POD、CAT、PPO活性.结果:来源于同一无性系植株的POD、SOD酶谱大致相同但也存在部分特异带,染色深浅也有差异且与外部形态有相关性:即长势不好,生根较少的植株,谱带明显加宽,染色也较深;相反,长势良好,生根较多的植株,谱带较浅.POD、CAT、PPO活性变化趋势与植株长势大致相反.结论:以上几种保护酶的酶谱和活性变化为初步筛选抗性突变体和研究菘蓝的抗病机理提供理论依据.
杂交晚稻新组合新香优101种植表现及高产栽培技术

新香优101在韶山种植,全生育期121 d,长势旺盛,分蘖力强,抗寒性强、落色好,高产稳产,米质较优,适合中肥水平栽培.介绍了其示范栽培表现和高产栽培技术要点.
杂交早稻新组合金优418春季高产制种技术

金优418是江西九洲种业有限公司用金23A与自育恢复系洲恢418配组育成的杂交早稻新组合,2008年12月通过江西省农作物品种审定委员会审定.介绍了金优418的亲本特征特性及高产制种技术.
水稻不育系昌丰A烟后繁殖技术

根据水稻不育系昌丰A 2004-2006年连续3 a较大面积烟后繁殖实践,总结了注重培育带蘖壮秧、父母本靠插不靠发、适时喷施"九二○"、严格去杂保纯、注意病虫害防治等高产繁殖技术措施.
食管癌根治术病人术后不同镇痛方法效应的比较

食管癌是常见的恶性肿瘤,病死率高 ~([1]).手术治疗是其主要的治疗方法,但术后易发生肺部感染等呼吸系统并发症 ~([2]),需要采取有效措施抑制并发症的发生.研究表明,术后镇痛可在一定程度上抑制术后肺部并发症的发生~([3,4]).本研究拟通过比较常规肌肉注射镇痛剂、术中冷冻肋间神经、病人自控硬膜外镇痛(PCEA)、病人自控静脉镇痛(PCIA)和病人自控肋间神经镇痛(PCNA)的方法治疗食管癌根治术后病人疼痛的效应,为该类病人选择适宜的术后镇痛方式.
2856例起源于围生期疾病调查

为了解新生儿疾病的特点,进一步预防和控制新生儿疾病,提高围生期疾病的治疗水平,现对2 856例新生儿住院病人的疾病构成和医疗费用支出进行统计分析,以加强新生儿疾病的防治,并将其纳入基本医疗保险范围,减轻家庭负担.
我院2008年出院者疾病构成的帕累托图分析

本文运用帕累托图分析2008年我院出院者疾病构成情况,以了解本地区及周边地区主要病种、多发病种和正在危害人们身体健康的潜在疾病,以引起疾病监控部门和广大人民群众的重视.
基于神经网络模型预测未来煤工尘肺发病危险性的研究

目前,我国大多数煤炭企业通过胸部X线检查来监测接尘矿工或诊断煤工尘肺患者.由于不同接尘工种和工龄的矿工罹患煤工尘肺的危险不同~([1,2]),企业不宜将胸部X线检查作为长期监测接尘矿工发病状况的常规检查方法.
先天性无虹膜一家系

先证者,女性,19岁.自幼双眼畏光伴视力低下,右眼视力下降逐渐加重且影响外观1年余,2008年12月来我院就诊.即往史:半年前右眼因眼压高间断用降眼压药物余无其他疾患.
从深水油气勘探到页岩油气开发——2009年AAPG年会技术热点透视

2009年AAPG年会于6月7-10日在美国丹佛市召开,来自世界各地及北美的7 400多名石油地质学家参加了本次会议.会议的主旨是:"回顾过去,展望未来"(Image the Past,Imagine the Future);会议的口号是:"对西部的激情依旧在延续,你也在其中吗?"(A passion for the West lives on.Are you in?)[1].
有Jaccoud关节病表现的银屑病性关节炎个案报告及文献复习

Jaccoud关节病首先在1896年由Bywaters在风湿热患者中描述~([1]),是一种具有特征性的多发性关节半脱位畸形而功能保持良好的非侵蚀性关节病,受累关节多为手、足小关节~([2]),踝、膝、肘、肩等大关节少见~([3-4]).
改良Schiff液的配制及应用

高碘酸Schiff液(PAS)特殊染色在病理诊断及科研工作中的应用很广,但由于Schiff液的配制步骤繁多,且不宜久存.为此我们对Schiff液的配制方法进行了改良,并在实践应用中取得了较为满意的结果.
精索原发平滑肌肉瘤1例

患者男,81岁,发现右腹股沟无痛性包块3个多月,进行性增大 .查体:右侧腹股沟区及阴囊扪及一大小9.0 cm×6.0 cm椭圆形包块,质地偏硬,移动度尚可,平卧位包块未消失,阴囊透光试验阴性.彩超:右侧精索及睾丸鞘膜腔内团块状回声.
悬浮培养细胞的细胞块制作及其应用

淋巴造血系统来源的细胞株在细胞培养过程中因细胞无法贴壁生长,只能采取悬浮培养的方式.悬浮培养的细胞在进行形态学及免疫表型研究中,通常采用细胞滴片和细胞甩片技术,因获得的细胞为三维立体结构,故所观察到的细胞结构欠清晰.
石榴皮的体外抗脂质过氧化作用

目的:研究石榴皮水提液对正常小鼠肝组织匀浆脂质过氧化的保护作用.方法:小鼠肝匀浆与石榴皮水提液共浴后,以自发产生脂质过氧化或者分别以自由基诱导剂CCl_4、H_2O_2和铁离子-抗坏血酸(Fe~(2+)-Vitc)激发脂质过氧化作用,以MDA产生量作为脂质过氧化作用程度指标.结果:石榴皮水提液可明显降低小鼠肝组织自发性MDA的生成,减轻CCl_4、H_2O_2、Fe~(2+)-Vitc所致的肝匀浆脂质过氧化反应.结论:石榴皮水提液具有良好的抗脂质过氧化作用.
基于神经网络的环孢素血药浓度预测

通过研究肾移植病人环孢素A血药浓度的不同影响因子,分别采用广义神经网络、Elman网络、BP神经网络等模型,对环孢素A血药浓度进行预测.结果显示三种网络模型都达到了较好的预测结果,其中BP网络的预测结果最好,平均相对误差为19.94%,Elman网络的平均相对误差为21.39%,广义神经网络的平均相对误差为25.93%.说明将神经网络应用于预测CsA血药浓度是可行的,其结果可以作为临床CsA的个体化给药的参考.
阻抗成像中恒流驱动模式的研究

在电阻抗成像中,当测量系统精度一定时,驱动模式直接决定了原始数据的信息量和信噪比,并影响成像质量.目前主要有相邻、交叉、相对驱动模式,这三种模式的电流驱动角不同而电压测量方式相同.在此基础上扩展为统一驱动模式,各种驱动角下数据的格式是一致的,有助于电阻抗成像技术的应用和交流.对不同驱动角的性能进行理论分析和实验验证,表明驱动角的增大会减小测量电压的波动,有利于小目标成像;驱动角为3个电极左右时,有利于多个目标的分离.
李四光教授在(筵)类研究上的贡献

我国著名地质学家李四光教授自1920年从英国伯明翰大学采矿系学成归国后,终生从事地质科学的研究工作,在微体古生物(筵)类和石炭一二叠纪地层、中国第四纪冰川、地质力学以及石油勘探、地震等领域取得了伟大的成就,并成为中国现代地质科学的主要奠基人之一.
牛磺酸对重复高正加速度(+Gz)应激大鼠心肌酶活性及抗氧化能力的影响

目的 观察牛磺酸对高正加速度(+Gz)应激大鼠心肌酶活性及超氧化物歧化酶(SOD)和丙二醛(MDA)含量的影响,探讨牛磺酸对心脏的保护作用.方法   24只雄性大鼠随机分成对照组、+10Gz应激组和牛磺酸(Tau)组.经动物离心机+10Gz暴露后,麻醉后腹主动脉采血,测定各组大鼠心肌酶活性及心肌组织和血清中SOD的活性和MDA的含量.结果  与牛磺酸组和对照组比较,+10Gz应激组大鼠血清肌酸激酶(CK)、肌酸激酶同工酶(CK-MB)、乳酸脱氢酶(LDH)和α-羟丁酸脱氢酶(α-HDB)活性均显著增加(P<0.05,P<0.01),牛磺酸组和对照组比较差异无显著性(P>0.05);与牛磺酸组和对照组比较,+10Gz应激组大鼠血清和组织中SOD活性降低,MDA含量增高.结论 牛磺酸可以使+Gz应激大鼠抗氧化防御系统功能提高,心肌酶的活性降低,对+Gz应激大鼠的心脏具有保护作用.
Preliminary Results of Drift Instability by Fast Optical Images in KT-5D Toroidal Plasma

Drift instability in plasma generated by electron cyclotron resonance (ECR) in KT-5D device was investigated by using a fast camera and Langmuir probes. The similarity between the distribution of light intensity from the images and the plasma pressure indicates a nearly linear relationship. The discharge images taken by the camera and the plasma parameters measured by the probes also indicate the existence of low frequency turbulent events with a time scale less than a few mini-seconds.
Analysis of pathogen distribution and drug resistance of nosocomial infections accompanied in patients with malignant

Objective:To investigate the pathogen distribution and drug resistance of nosocomial infections accompanied in patients with malignant tumor.Methods:The pathogen culture and drug-sensitivity data of 107 specimens isolated from malignant tumor patients accompanied with nosocomial infection were retrospectively analyzed.Results:Among 118 strains of pathogens isolated from 107 specimens,77 were gram-negative bacillus(65.3%),26 were gram-positive coccus(65.3%), and 15 were fungus(12.7%).Eleven specimens were revealed to have combined infection of bacterium and fungus. Gram-negative bacillus showed high sensitivity to amikacin,ciprofloxacin,and tienam.Gram-positive cocci were highly sensitive to tienam and vancomycin.The bacteria were resistant to other antibiotics in different degrees.Vancomycin-resistant staphylococcus was not detected.Candida was sensitive to antifungals.Conclusion:Conditional pathogenic bacteria were mainly responsible for nosocomial infections in malignant tumor patients with considerable drug resistance.This shows that bacterial tests and the rational use of antibiotics should be emphasized in clinical practice to prevent the formation of drug resistant strains and further endogenous infections.
Influence of excessive biotic pressure and fire on culm diameter, density flux and seed production in Melocanna baccifera stands

A study was conducted to investigate culms density and size, seed size and production rate in Melocanna baccifera stands disturbed by biotic pressure and fire. Results revealed that culms density, number and size of seeds produced in the bamboo stands were significantly affected by frequent fire and excessive biotic pressure (collection of young shoots for vegetables and mature culms). The culm density and seed production rate decreased significantly in the stand subjected to excessive biotic pressure. An increasing exposure of culms to sun light was responsible for the above decrease. Seed production rate significantly increased in case of culms subjected to fire in comparison to the control. It indicated that fire stimulated the seed production in M. baccifera stand.
Application of landscape ecology to the research on wetlands

This review describes the characteristics and hot spots of wetland research, including biodiversity protection of wetland, management and restoration of wetland, function and process of wetland, and the theories, methods and scales of landscape ecology. Moreover, some deficits of landscape ecology theory and method were discussed, and the application of landscape ecology to research on wetlands was reviewed specially, involving in the application of landscape structure principle, landscape pattern, and scale and hierarchy theory. In conclusion, landscape ecology plays an enlightening and guiding function on the comprehensive research of wetlands at multi-scales.
Beneficial effects of cold-moist stratification on seed germination behaviors of Abies pindrow and Picea smithiana

A study was conducted to evaluate the effect of GA3, moist-chilling and temperature on seed germination of Abies pindrow and Picea smithiana from five different provenances. Seeds were soaked in GA3 (10 mg·L~(-1)) for 24 h, then chilled at 3–5°C for 15 days. Four temperature regimes viz. 10°C, 15°C, 20°C and 25°C were used for stimulating seed germination. Results showed that soaking and chilling significantly increased germination percentage. The germination percentage was highest at 10°C. Overall results showed that soaking seeds in GA3 (10 mg·L~(_1)) for 24 h, moist chilling for 15 days, and germinating at 10°C produced an effective germination in both the species studied. The statistical analysis of the data proclaimed significant effect of treatment, temperature, provenance and treatment with temperature interactions on seed germination.
Soil microbial properties and nutrients in pure and mixed Chinese fir plantations

An investigation on soil organic carbon, total N and P, NO_3~--N, available P, microbial biomass C, N and P, basal respiration and metabolic quotients (qCO_2) was conducted to compare differences in soil microbial properties and nutrients between 15-year-old pure Chinese fir (Cunninghamia lanceolata) and two mixed Chinese fir plantations (mixed plantations with Alnus cremastogyne, mixed plantations with Kalopanax septemlobus) at Huitong Experimental Station of Forest Ecology (26°45′N latitude and 109°30′E longitude), Chinese Academy of Sciences in May, 2005. Results showed that the concentrations of soil organic carbon, total N, NO_3~--N, total P and available P in mixed plantations were higher than that in pure plantation. Soil microbial biomass N in two mixed plantations was averagely higher 69% and 61% than that in pure plantation at the 0–10 cm and 10–20 cm soil depth, respectively. Soil microbial biomass C, P and basal respiration in mixed plantations were higher 11%, 14% and 4% at the 0–10 cm soil depth and 6%, 3% and 3% at the 10–20 cm soil depth compared with pure plantation. However, soil microbial C: N ratio and qCO_2 were averagely lower 34% and 4% in mixed plantations than pure plantation. Additionally, there was a closer relation between soil microbial biomass and soil nutrients than between basal respiration, microbial C: N ratio and qCO_2 and soil nutrients. In conclusion, introduction of broad-leaved tree species into pure coniferous plantation improved soil microbial properties and soil fertility, and can be helpful to restore degraded forest soil.
Habitat suitability change of red-crowned crane in Yellow River Delta Nature Reserve

Habitat loss and fragmentation are mainly associated with population decrease of endangered species and biodiversity loss. The habitat suitability maps of red-crowned crane (Grus japonensis) in 1992, 1999 and 2006 were produced by using Ecological Niche Suitability Model (ENSM) in Yellow River Delta Nature Reserve (118°33′-119°20′E longitude, 37°35′-38°12′N latitude), Shandong Province, China. Based on the habitat suitability maps, the causation and change law of habitat loss and fragmentation of red-crowned crane were analyzed by selecting a series of landscape pattern indices. Results showed that due to scarcities of fresh water sources, habitat suitability of red-crowned crane in 1999 was inferior to that in 1992 and 2006 no matter whether human disturbances existed or not. Besides, human disturbance activities, especially road disturbances, increased rapidly during the period of 1992–2006. This worsened the habitat loss and fragmentation of red-crowned crane, and led to degrading habitat suitability of red-crowned crane in 2006, compared with that in 1992. In conclusion, fresh water sources and human disturbance activities are the two main factors that drive the habitat suitability change of red-crowned crane.
Survey of damaging pests and preliminary assessment of forest health risks to the long term success of Pinus radiata introduction in Sichuan, southwest China

Pinus radiata was introduced to the summer rainfall environments of Sichuan Province, China in the 1990s as a part of an affore-station program for soil and water conservation in the arid and semi-arid river valley area of Aba Prefecture. Within this region a total area of 26 000 ha have been identified through climate matching as suitable and a further 63 000 ha potentially suitable for environmental plantings of P. radiata. The plantations are being established in widely separated small patches on steep and degraded slopes along the dry river valley. The newly introduced P. radiata are exposed to two kinds of forest health risks: they may be attacked by (a) indigenous pathogens and pests against which they may not possess any resistance or (b) by inadvertently introduced foreign pests or pathogens. This paper presents a survey of the potential damaging pests and a preliminary assessment of forest health risks facing the P. radiata plantations over a much longer timeframe than the initial phase of introduction and early plantation establishment. An empirical approach was adopted to evaluate forest health risks by a combination of literature review, examination of historical records of pest and disease outbreaks in the surrounding coniferous forests, field surveys and inspections, specimen collection and identification, and most importantly, expert analysis of the likelihood of attack by specific pests and pathogens and the subsequent impact of such attacks. The assessment identified some specific forest health risks to the long-term success of P. radiata introduction in this area. These risks are closely associated with the indigenous pests and pathogens of the two native pine species, P. tabulaeformis and P. armondii since these pests and pathogens are considered more likely to establish on P. radiata over time. Exotic pests and pathogens are of a quarantine concern at present. Based on the results of assessment, recommendations are provided to improve forest vigour and to reduce the forest health risks posed by indigenous as well as exotic pests and pathogens to the introduced P. radiata. Ways to increase the ability to manage the forest health risks once a particular pest infestation and disease eventuates are also recommended. Although detrimental to the survival and growth of the introduced P. radiata, the impact of identified forest health risks are not considered to be fatal to the long term success of P. radiata in this area.
常用永磁材料及其应用基本知识讲座 第七讲 常用永磁材料的老化（磁损失）机理和对策

1引言随着时间流逝，并在各种环境因素作用下，常用永磁材料的磁特性会有所下降，应用中的永磁体的表磁和磁通量会有所下降，我们称之为老化（磁损失）。常用永磁材料在这方面的表现已在第六讲中作了概述。那么我们进一步要问，永磁的老化（磁损失）是怎么发生的？怎么样使永磁体的老化（磁损失）尽可能小？怎么样使永磁体的老化（磁损失）预先在应用前发生，而在应用中很稳定？本讲依次讨论这些问题。
瓦形磁体后加工智能柔性制造系统开发

瓦形磁体后加工是磁瓦生产的一道重要工序。针对我国瓦形磁体毛坯尺寸精度差、后加工装备和工艺技术落后等问题，我公司开发了具有自主知识产权的瓦形磁体后加工智能柔性制造系统。此系统由五台设备实现无缝联接，组成磨加工全自动生产线，完成瓦形磁体底面平台、弦宽两侧面、内外圆弧面及内外圆弧倒角的全部加工。简要介绍了系统工作流程和关键设备——JS6070型四工位磁瓦自动倒角机和JS0070型四工位通过式瓦形磁体磨床，重点分析了加工误差来源与控制措施。系统实现了无人操作的自动化加工，不仅加工精度高，加工品质一致性好，而且加工能力大，1000t／年三班制生产只需9名操行工。
采用PCP协议实现TCP NAT穿越

本文提出了一种可靠的TCP NAT穿越方法，有效解决了P2P传输过程中NAT穿越的问题。具体的实现方法是：首先研究NAT穿越的关键技术，接着对TCP NAT穿越的实现原理进行分析，最后提出基于PCP协议的TCP NAT实现过程。研究结果表明：本文提出的基于PCP协议的TCP NAT穿越方法是可行的，能够较好的满足P2P技术的应用，如果进一步提高穿透率，则必须保证端口的连续性。
软件过程模型应用策略

该文提出了三种软件过程的应用策略。在比较分析几种不同软件过程模型的基础上，结合不同的项目实践，表明三种策略的应用环境，并且举例说明了方法在软件项目中的应用。实践证明，这些软件过程设计策略在项目实施的过程中起到了很好的指导作用。