TD-SCDMA系统空中接口容量研究

TD-SCDMA系统无线资源管理中一个重要内容是接纳控制,而它依托于对各小区容量的测量,因此小区容量的计算方法成为一个十分重要的研究问题。由接纳控制和小区容量等概念入手,提出小区上、下行容量估计算法,上行容量的计算基于对噪声恶化量的控制,因该值能很好地衡量系统的干扰状况;下行容量算法主要参考基站发射的总功率,有着直观的物理意义。进一步分析了相邻小区干扰与小区容量之间的关系,为网络的优化提供了理论依据。相关重要变量关系做了仿真,算法得到验证。     

高校宗教现象及其功能性分析——以湖州师范学院为个案

通过对湖州师范学院校园内宗教关系的实地调查,对新时期大学生的宗教信仰做出哲学上的功能性解释,力求正确评价大学校园内宗教的社会作用,使高等院校中的宗教关系与社会主义和谐社会秩序相适应,进而为正确制定高校宗教政策提供理论依据。     

谈“三个代表”对党性锻炼的“相应指导律”

江泽民同志“三个代表”思想是共产党员党性锻炼的集中,凝炼,简明,便于掌握的强大思想武器。它对党性锻炼具有对应性的指导,中在个人整体素质上如何增强创新力,人格力和凝聚力,在思想和世界观上如何树立紧定的发展观,崇高的价值观和人生观,在工作实践和具体行动上如何铸炼走有中国特色社会道路的“铁心”,在形形色色文化生活中需要恪守的“铁纪”和全心全意为人民服务的“铁劲”,等等。     

由两台柔性机器组成的流水作业问题

研究了由两台柔性机器所组成的流水作业问题,其中有n个相同工件,每一工件需先在机器1上完成所需时间为p1的第一次加工,然后城单独在机器1上或单儿在机器2上完成所需时间分别为P12,P21的第二次加工,最后在机器2上完成所需时间为P2的第三次加工,要求适当安排这n个工件的加工方式和次序以使加工全程（Cmax)最小,本文对此 给出了分析解。     

国内安乐死研究综述

安乐死在我国当前的研究，已不是一个隐问题，从三十多年前第一个案例的出现到现在相关理论逐渐成熟，我国的安乐死研究已经走过漫长的摸索阶段，正在进入一个新的发展时期。从对死亡概念的鉴定，到具体的案例中出现的伦理和法律的争议，再到安乐死对于现实所引发的各种思考，将我国的安乐死研究渐渐的推向一个新的阶段。所以，在这里，有必要对我国近三十年来的安乐死研究做一个总体的梳理和把握，以便更好地进行下一步的深入探讨。     

Will Crash Experience Affect Driver's Behavior? An Observation and Analysis on Time Headway Variation Before and After a Traffic Crash

Research into the impact of road accidents on drivers is essential to effective post-crash interventions.However, due to limited data and resources, the current research focus is mainly on those who have suffered severe injuries.In this paper, we propose a novel approach to examining the impact that being involved in a crash has on drivers by using traffic surveillance data.In traffic video surveillance systems, the locations of vehicles at different moments in time are captured and their headway, which is an important indicator of driving behavior,can be calculated from this information.It was found that there was a sudden increase in headway when drivers return to the road after being involved in a crash, but that the headway returned to its pre-crash level over time.We further analyzed the duration of the decay using a Cox proportional hazards regression model, which revealed many significant factors(related to the driver, vehicle, and nature of the accident) behind the survival time of the increased headway.Our approach is able to reveal the crash impact on drivers in a convenient and economical way.It can enhance the understanding of the impact of a crash on drivers, and help to devise more effective re-education programs and other interventions to encourage drivers who are involved in crashes to drive more safely in the future.     

城市商业区位诊断研究

探讨了城市商业实际选址所要考虑的空间尺度、逻辑次序和分析要点。首先进行网络分析。在城市与区域的范围，分析行业网络和企业网络（公司网络）认识行业、企业网络的空间格局，以确定空间上商业设施的布局方向。其次进行区域分析，以所选址的商业设施的基本商圈为范围，确定商业设施的区域定位，即商业设施的商业中心等级和合适区域。分析区域的购买力（基本购买力、特定人群购买力和购买潜力），分析区域的地价成本和与区域相关的其他成本，分析区域的空间竞争形势，分析商业设施与地方文化和消费习惯的切合程度。以确定选址的区域。再次，进行地段分析。分析选址商业集聚地与城市其他商业中心的趋近性、交通的枢纽程度，地段内部选址商业设施与其他商业设施、城市其他设施、主导消费群体的关联，以及地段内部的空间结构（与地段中心的距离）。最后，进行地点分析。分析用地性质（临街的宽度、深度与停车场有无和远近），分析选址商业设施与道路的关系、易识别程度。借鉴了国内外近年来的商业区位理论的发展，总结和提炼了商业选址、规划布局的实际经验，将商业区位选择问题进一步理论化、应用化。     

采煤机运动参数对工作面温升的影响

采煤工作面的温度关系到工人的健康、设备的使用性能和煤炭生产的安全。为了研究采煤机运动参数对工作面温升的影响,建立了采煤机设计参数与工作面温升关系的数学模型,分析了采煤机的牵引速度、滚筒转速与工作面温升之间的关系及其影响。模拟结果表明,采煤机的运动参数对工作面的温升有直接的影响,工作面的温度随采煤机牵引速度的提高迅速增加,滚筒转速对工作面的温升影响较大;适当降低采煤机的牵引速度和滚筒转速能降低采煤工作面的温升。该结果为正确选择采煤机的运动参数、减少采煤机工作发热、降低采煤工作面温升、进一步改善采煤工作面的环境提供了依据。     

Marine iguanas die from trace oil pollution

An oil tanker ran aground on the Galapagos island of San Cristóbal on 17 January 2001, spilling roughly three million litres of diesel and bunker oil. The slick started to spread westwards and was dispersed by strong currents, so only a few marine animals were killed immediately as a result. Here we draw on the long-term data sets gathered before the spill to show that a population of marine iguanas (Amblyrhychus cristatus) on Sante Fe island suffered a massive 62% mortality in the year after the accident, due to a small amount of residual oil contamination in the sea. Another population on the more remote island of Genovesa was unaffected.     

不同放牧时期绵羊啃食对冷蒿和羊草生长高度的影响

利用野外实验所获得的数据,进行差异显著性分析、多重比较,研究不同时期(5～8月)放牧啃食对冷蒿和羊草生长的影响(放牧前后枝条高度的变化),结果表明:不同时期放牧对冷蒿和羊草都具有显著的影响(啃食高度cm).在5～7月间,对冷蒿的影响程度基本上呈现降低的趋势,而在8月有所增加.在6～7月,放牧对冷蒿的影响极小,为冷蒿的再生提供了有利的时间保证.在5～8月,放牧对羊草的影响基本上呈递减的趋势.不同时期放牧对冷蒿和羊草的影响大致成互补的关系.不同时期放牧对冷蒿影响的波动与羊草相比较为平缓,而且不同时期放牧对冷蒿的影响比羊草低.     

我国省域社会信任水平对签字会计师选择的影响

 以2007—2019年我国A股上市公司为样本,建立多元线性回归模型,研究我国省域社会信任水平对签字会计师选择的影响;考察产权性质在社会信任与签字会计师选择之间发挥的调节作用,分析签字会计师选择在社会信任影响盈余质量上发挥的渠道作用。研究结果表明:我国省域社会信任水平越高,上市公司更倾向于选择具有行业专长的签字会计师;与非国有企业相比,社会信任更能促进国有企业上市公司选择具有行业专长的签字会计师;当上市公司选择行业专长的签字会计师时,社会信任能够更大程度地提高盈余质量。建议政府重视社会信任水平的建设,通过政策、教育等方式进行引导,营造良好的社会信任环境,促进企业高质量发展。     

采煤机工作位置对工作面噪声的影响

利用所建立的数学模型,以国产某型滚筒式采煤机为例,采用计算机模拟的方法,得到了采煤机工作位置与工作面噪声之间关系的曲线,确定了采煤机工作位置对工作面噪声的影响,为预测采煤机工作对工作面噪声的影响、完善采煤机工作性能的评价体系、改进机器设计、保障采煤工人的身体健康奠定理论基础.     

基于调查问卷的大学生读书现状调查分析

信息时代下大学生是否具有浓厚的读书兴趣和养成良好的读书习惯并能通过多途径读书方式来获得学习能力,关系到当代大学生自身人文素质、社会生存能力,也关系到和谐校园、和谐社会的建设．基于千份调查问卷的素材,对信息时代下在校大学生的读书兴趣、读书习惯、读书途径、读书类别进行调查分析,旨在研究在校大学生现阶段读书情况,研究大学生读书基本特点,找出存在问题,分析问题产生的原因,提出具体措施．     

Experimental evidence for an alternative to directed mutation in the bgl operon.

The directed mutation hypothesis suggests that some mutations occur more often when selectively advantageous than when neutral or disadvantageous, challenging the principle that the selective value of a mutation does not affect the rate of its occurrence. Mutations in the bgl operon of Escherichia coli have been reported to be a case of directed mutation. E. coli K12 strains chi342LD cannot grow on salicin but derivatives with two mutations in the bgl operon, an excision of IS150 (formally called IS103) from bglF and a point mutation or insertion in bflR, grow rapidly on this sugar. When chi342LD is grown on a medium containing salicin, bglF excision mutants accumulate to a frequency of greater than 1%, even though these mutants are reportedly unable to grown on salicin, and Sal+ double mutants subsequently attain a high frequency. Comparable accumulations of excision mutants and Sal+ double mutants are not observed in the absence of salicin. As salicin is not mutagenic, it has been suggested that excision mutations in bglF might serve only to create the potential for a secondary selectively advantageous mutation. We show here, however, that these double mutants can be accounted for by spontaneous mutation to intermediate genotypes in non-growing populations, coupled with slow growth of some of these intermediates on salicin, which enables their populations to reach a size where secondary mutations allowing rapid growth on salicin become common.     

闽地《诗经》学传统与黄道周《诗经》学述略

闽地开发较晚,但在五代至北宋初即已有蔡元鼎这样的《诗》学专家.至朱子兴学闽地,其所著《诗集传》在闽地影响深远.受其影响,闽地治《诗》者代有人出.黄道周浸淫于具有浓郁《诗》学氛围的闽南,一生治《诗》不辍.黄道周《诗》学著述散佚严重,但经过爬梳剔挟,还是可以发现其有大量的《诗经》学文献存世.梳理闽地《诗经》学传统以及黄道周的《诗经》学研究,可以引起学界对黄道周乃至闽地《诗经》学的关注和研究,以充分揭示其特点和价值.     

英语语感及其培养--话语分析在大学英语教学中的应用

20世纪50年代美国语言学家Chomsky提出了“语感”的概念,引发了对语感的研究。国内叶圣陶先生最早提出“语感”的理论,最近几年国内兴起了在英语教学中如何培养学生的英语语感的研究。从语篇层面,以词汇、语法为突破口,研究在英语教学中如何运用话语分析理论培养学生的英语语感是一个新课题。     

Electrically induced structure formation and pattern transfer

The wavelength of light represents a fundamental technological barrier to the production of increasingly smaller features on integrated circuits. New technologies that allow the replication of patterns on scales less than 100 nm need to be developed if increases in computing power are to continue at the present rate. Here we report a simple electrostatic technique that creates and replicates lateral structures in polymer films on a submicrometre length scale. Our method is based on the fact that dielectric media experience a force in an electric field gradient. Strong field gradients can produce forces that overcome the surface tension in thin liquid films, inducing an instability that features a characteristic hexagonal order. In our experiments, pattern formation takes place in polymer films at elevated temperatures, and is fixed by cooling the sample to room temperature. The application of a laterally varying electric field causes the instability to be focused in the direction of the highest electric field. This results in the replication of a topographically structured electrode. We report patterns with lateral dimensions of 140 nm, but the extension of the technique to pattern replication on scales smaller than 100 nm seems feasible.     

一种基于词共现图的文档主题词自动抽取方法

主题词抽取是文本自动处理的基础性工作.在对现有主题词抽取方法深入研究的基础上,提出了一种基于词共现图的文档主题词自动抽取方法;该方法以基于词频统计方法为基础,利用在词共现图形成的主题信息以及不同主题间的连接特征信息自动地提取文档中的主题词,旨在找出一些非高频词且又对主题贡献大的词.实验表明了该抽取方法抽取出的主题词更能准确地符合了作者的主题.     

Arzela-Ascoli定理条件的改变和减弱

文章将Arzela-Ascoli定理中的闭区间[α,β]上的连续函数族扩展到无穷紧空间上的连续算子族,给出了无穷紧空间上的连续算子族相对紧性判断的一个充要条件;然后将定理中一致有界减弱为在一点有界,定理的结论仍然成立.     

Inequality in mutation rates of the two strands of DNA

As the mechanisms for replicating the two strands of duplex DNA differ it is, in principle, possible for the mutation rates to differ depending on which strand is being copied. In the absence of selection this would lead to a difference in the measured rate of a particular base substitution, such as T to C, depending on which DNA strand was analysed to determine the rate. Thus a change such as T to C on one DNA strand results from either a direct T-to-C mutation on that strand or an A-to-G mutation on the complementary strand; for the other strand the situation is reversed, and it can be seen that different processes are responsible for the two cases, allowing for asymmetry in substitution rate. We have tested whether such asymmetry indeed occurs by studying equivalent sequences from the beta-globin complexes of six species of primate. Our results reveal an asymmetry in substitution rates consistent with predictions based on strand-inequalities in mutation rates. Our sequence comparisons also allow us to make predictions about the positions of replication origins and the replication error rates of one strand relative to the other.