个案:1800位百万富翁和数位亿万富翁横空出世

策划人语国家发改委在预测我国未来钢铁市场需求时认为,到2010年钢材实际需求为3.1亿吨,折合成钢的需求是3.3亿吨。然而,从目前的发展速度来看,到2005年国内钢铁的生产能力已经能够满足2010年的钢铁需求了。中国钢铁工业协会的统计数据显示,2003年我国钢铁生产能力已达到2.4亿吨,预计到2005年底将形成3.3亿吨的生产能力,已大大超过2005年市场预期需求。此外,据不完全统计,各地拟建项目的生产能力还约有0.7亿吨。面对同比增长22.38%的速度,有人甚至用"大炼钢铁"这个40多年前的特定时代词语来表达对现状的担忧。为了抑制钢铁行业过热,国家推出了一系列措施。作为第一钢铁大省,钢铁无疑是河北省经济特别是工业经济的龙头老大,对全省经济发展具有举足轻重之深刻影响。2003年,河北省冶金工业销售收入总额突破1000亿元,实现利税首次突破200亿元,实现利润首次突破百亿元,实现利润数占全省工业利润总额的30.25%。钢铁产业对河北省的重要性由此可见一斑。然而,限制性政策的出台,势必给行业、企业的发展带来影响。那么,面对国家宏观调控政策,我们该有什么样的态度?河北省的钢铁业发展是否过热?是否还有发展空间?

The influences of canopy temperature measuring on the derived crop water stress index

Crop water stress index(CWSI)is widely used for efficient irrigation management.Precise canopy temperature(T_(c))measurement is necessary to derive a reliable CWSI.The objective of this research was to investigate the influences of atmospheric conditions,settled height,view angle of infrared thermography,and investigating time of temperature measuring on the performance of the CWSI.Three irrigation treatments were used to create different soil water conditions during the 2020-2021 and 2021-2022 winter wheat-growing seasons.The CWSI was calculated using the CWSI-E(an empirical approach)and CWSI-T(a theoretical approach)based on the T_(c).Weather conditions were recorded continuously throughout the experimental period.The results showed that atmospheric conditions influenced the estimation of the CWSI;when the vapor pressure deficit(VPD)was>2000 Pa,the estimated CWSI was related to soil water conditions.The height of the installed infrared thermograph influenced the T_(c)values,and the differences among the T_(c)values measured at height of 3,5,and 10 m was smaller in the afternoon than in the morning.However,the lens of the thermometer facing south recorded a higher T_(c)than those facing east or north,especially at a low height,indicating that the direction of the thermometer had a significant influence on T_(c).There was a large variation in CWSI derived at different times of the day,and the midday measurements(12:00-15:00)were the most reliable for estimating CWSI.Negative linear relationships were found between the transpiration rate and CWSI-E(R^(2)of 0.3646-0.5725)and CWSI-T(R^(2)of 0.5407-0.7213).The relations between fraction of available soil water(FASW)with CWSI-T was higher than that with CWSI-E,indicating CWSI-T was more accurate for predicting crop water status.In addition,The R^(2)between CWSI-T and FASW at 14:00 was higher than that at other times,indicating that 14:00 was the optimal time for using the CWSI for crop water status monitoring.Relative higher yield of winter wheat was obtained with average seasonal values of CWSI-E and CWSI-T around 0.23 and 0.25-0.26,respectively.The CWSI-E values were more easily influenced by meteorological factors and the timing of the measurements,and using the theoretical approach to derive the CWSI was recommended for precise irrigation water management.

“亿以内数的读法和写法” 教学构想

一、调整学生原有的认知结构,引导他们积极扩充数的概念。 “亿以内数的读法和写法”,是学生首次认识比一万大的数,而几十万、几百万、几千万乃至一亿的数的出现,将直接否定他们原有认识结构中的“大数”概念,并容易产生诸如“十万、百万、千万、一亿到底是一些多大的数”,“为什么要出现这些‘大数’,学习它们有何作用”的困惑。因此。

Static CMOS Implementation of Logarithmic Skip Adder

Circuit design of 32 bit logarithmic skip adder (LSA) is introduced to implement high performance,low power addition.ELM carry lookahead adder is included into groups of carry skip adder and the hybrid structure costs 30% less hardware than ELM.At circuit level,a carry incorporating structure to include the primary carry input in carry chain and an 'and xor' structure to implement final sum logic in 32 bit LSA are designed for better optimization.For 5V,1μm process,32 bit LSA has a critical delay of 5 9ns and costs an area of 0 62mm 2,power consumption of 23mW at 100MHz.For 2 5V,0 25μm process,critical delay of 0 8ns,power dissipation of 5 2mW at 100MHz is simulated.

“亿以内数的读法和写法”教学解析

本单元是小学数学教材第七册的内容,以教学万级数的读法为重点,关键是把个级数的读法推广到万级。

对《议小学数学题中的代数解法》一文的纠正

贵刊1995年第七期《议小学数学题中的代数解法》一文,作者从四方面例说了:“用代数方法解题,不仅思路清晰,方法灵巧,步骤简明,而且可以开阔学生视野,增强学生学习兴趣,对于提高学生的抽象思维能力和解题能力极为有利。”读后颇受教益。但作者在涉及用字母表示数的时候,忽视了整数和数位上数码的相互关系,整数表示格式的特殊性。

数码相机 市场新宠

根据美国方面的统计,预计1997年全球市场可销售数位相机100万台,并将以每年50％左右的速度增长到2001年,然后再由商业领域逐步过渡到个人消费领域。尽管现在数位相机在市场上初次受宠,但考虑替换现有相机的问题还是为时过早。同普通的全自动照相机一样,目前中国数位相机市场,仍然是“Made In Japan”的天下。数位相机诞生三年来,虽然已经在照相市场初露锋芒,但是动作缓慢,销量增长不大,一个重要的原因是市场配套设施很不完善。目前数位相机的发展趋势是体积小、精度高、使用方便。

Improved SMB speckle filtering of polarimetric SAR data with synergistic use of orientation angle compensation and spatial majority rule

The scattering-model-based(SMB)speckle filtering for polarimetric SAR(Pol SAR)data is reasonably effective in preserving dominant scattering mechanisms.However,the efficiency strongly depends on the accuracies of both the decomposition and classification of the scattering properties.In addition,a relatively weak speckle reduction particularly in distributed media was reported in the related literatures.In this work,an improved SMB filtering strategy is proposed considering the aforementioned deficiencies.First,the orientation angle compensation is incorporated into the SMB filtering process to remedy the overestimation of the volume scattering contribution in the Freeman-Durden decomposition.In addition,an algorithm to select the homogenous pixels is developed based on the spatial majority rule for adaptive speckle reduction.We demonstrate the superiority of the proposed methods in terms of scattering property preservation and speckle noise reduction using L-band Pol SAR data sets of San Francisco that were acquired by the NASA/JPL airborne SAR(AIRSAR)system.

A Brief Report of Graphic Explanations for Generalized Potential Temperature in the Non-Uniformly Saturated Atmosphere

Compared to potential temperature （θ） in the dry atmosphere and equivalent potential temperature （θc） in the saturated atmosphere, generalized potential tem- perature （θ＂） has already proven a better thermodynamic parameter in describing the non-uniformly saturated real atmosphere. To add otherwise absent graphic explanations, this paper first presents the physical definition of θ through a tephigram. Then, the utility of the measurement in identifying and forecasting the locations of precipita- tion maxima and heat wave areas with diagnostic com- parison studies and traditionally used thermodynamic parameters is shown.

Impact coefficient and reliability of mid-span continuous beam bridge under action of extra heavy vehicle with low speed

To analyze the dynamic response and reliability of a continuous beam bridge under the action of an extra heavy vehicle, a vehicle–bridge coupled vibration model was established based on the virtual work principle and vehicle–bridge displacement compatibility equation, which can accurately simulate the dynamic characteristics of the vehicle and bridge. Results show that deck roughness has an important function in the effect of the vehicle on the bridge. When an extra heavy vehicle passes through the continuous beam bridge at a low speed of 5 km/h, the impact coefficient reaches a high value, which should not be disregarded in bridge safety assessments. Considering that no specific law exists between the impact coefficient and vehicle speed, vehicle speed should not be unduly limited and deck roughness repairing should be paid considerable attention. Deck roughness has a significant influence on the reliability index, which decreases as deck roughness increases. For the continuous beam bridge in this work, the reliability index of each control section is greater than the minimum reliability index. No reinforcement measures are required for over-sized transport.

Study on the Precise Location of the Xinjiang Yutian M_S7.3 Earthquake

The seismic waveform of the Yutian Ms7. 3 earthquake, Xinjiang on February 12, 2014 was recorded clearly and completely by the Digital Seismic Networks of Xinjiang, Qinghai, Tibet, and Xinjiang Hotan array, so the method of joint location by regional seismic network and seismic array can be used to accurately determine the earthquake source location. The following technologies were used in the process of location： （ 1 ） We selected seismic stations equally located around the epicenter of the Ms 7. 3 earthquake with an average interval of about 15 degrees in the initial location. （2） The recording waveforms of Yutian seismic station were rotated to the radial and tangential directions to precisely obtain the arrival time of S-waves to determine the epicentral distance. （ 3） The velocity model was used in the determination of location of the epicenter, based on the historical records of earthquakes in the area within a radius of 1.0 ° from the source as the center, and the velocity model is obtained after re-fitting and calibration. （4） Based on the waveform records of the Hotan seismic array, the method of waveform beaming was used to determine the azimuths and perform the correction of the epicenter location with these azimuths. （5） The deterministic method was used to measure the source depth. Finally, it is concluded that the Yutian Ms 7. 3 main shock hypocenter location is 36. 197°N, 82. 467°E, focal depth 12km and original time 17：19：48. 2 μm. February 12, 2014.

基于智力城镇化的特色小镇产业培育探索——以辽宁通远堡镇为例

我国城镇化正处于劣势的体力城镇化阶段,特色小镇作为新型城镇化的主力军,体力化威胁仍不可避免。为缓解特色小镇体力化困境,文章基于智力城镇化的相关理论,以辽宁通远堡镇为例,围绕特色产业展开智力化培育的探索。结合链式产业思维,以智力投入、智力主体、智力产出三大环节为基础,以智力要素创新性地打造智力链条,构建可持续的特色产业,带动城镇化转型升级,以期为辽宁省乃至全国特色小镇培育提供借鉴。

Semi-Commutators of Toeplitz Operators on Ap(?)

In this paper, we investigate the semi-commutators of Toeplitz operators on the weighted Bergman spaces Ap(?), and characterize the bounded harmonic functions u and v on the unit disk for which the semi-commutator of Toeplitz operators Tu and Tv is 0 or compact operator.

“亿以内数的读法”教学设计

教学内容：九年义务教育六年制第七册第１—３页中的例１、例２和练习一的１—５题。教学目的：１．使学生认识计数单位“万”、“十万”、“百万”、“千万”和亿，知道亿是很大的数。２．知道亿以内各个计数单位的名称和相邻两个单位之间的关系。３．掌握亿以内的数位顺...

巧解古例《金香炉》十法

巧解古例《金香炉》十法王光云田秀英凡是珠算爱好者都知道，《金香炉》是古代传统趣题疑难之一。即为５５５５５５×９５７，一般人们都采用随数乘法，解法也不多。笔者根据数组的规律，运筹不同的变式，达到十种解法，不仅快速简便，而且颇有趣味。现将此题解例如下：１...

A Note on Schwarz-Pick Lemma for Bounded Complex-Valued Harmonic Functions in the Unit Ball of R^n

In this paper, the authors prove a Schwarz-Pick lemma for bounded complexvalued harmonic functions in the unit ball of Rn.

The spectrum of Bergman Toeplitz operators with some harmonic symbols

In this paper,we show that the spectrum of Toeplitz operators on the Bergman space with harmonic symbols of affine functions of z and equals the image of closed unit disk under the symbol.Surprisingly this does not hold for Toeplitz operators with harmonic symbols of quadratic functions of z and .

Phase asynchrony between flare index and sunspot activity

In this paper, the relative phase relationship between flare index and sunspot activity （sunspot numbers and sunspot areas） is investigated. It is found that （i） the flare index and sunspot activity are asynchronous in phase space at all period scales, and the former lags behind the latter, which implies our results are supported for the integral response model; （ii） their different definitions and physical meanings may be a major reason for their phase asynchrony between them, and the solar flare activity favor to be related to the magnetic complex rather than magnetic strength.

Epicenter and magnitude of large earthquake determined from high-rate GPS observations: A case study of the 2008 M8.0 Wenchuan earthquake

For earthquake and tsunami early warning and emergency response,the earthquake epicenter and magnitude should be determined rapidly and correctly.Using high-rate GPS observations,we can readily obtain precise and high resolution displacement time series and the seismic waveforms during the earthquake.In this paper,a new algorithm is proposed for estimating the earthquake epicenter and magnitude with the seismic waveforms derived from high-rate GPS data during the earthquake.A case study of the 2008 Wenchuan earthquake is conducted from 1 Hz GPS data and the epicenter and magnitude are determined.Compared with the results issued by the China Seismological Bureau,the estimation error of the epicenter and the magnitude is about 12 km and 0.1 magnitude unit,respectively.It has shown that high-rate GPS could be a new tool feasible for estimating the earthquake epicenter and magnitude,independent of or combined with seismometers.

American and Chinese Policies toward Taiwan： How Much Convergence7

This paper sets up a framework for analyzing the policies of the US and the People＇s Republic of China toward the Republic of China （Taiwan）. It surveys how the two powers＇ policies have evolved during the period 1949-2009 and makes numerical evaluations of the degree of ＂supportiveness＂ of American policy toward the ROC and the degree of ＂aggressiveness＂ of the PRC＇s policies. The evaluations are charted. The paper observes that the US and the PRC have been engaged in a kind of ＂ negotiation-by-move-and-countermove＂ over this period. This form of interaction is found to be slow-motion and not very effective for resolving differences between the two sides. However, the need for a formal resolution of the island＇s political-legal status becomes less important as the trade, investment, and people-to-people linkages between the two Chinese entities increase. There appears to be a huge potential for an ever-greater convergence of the two powers＇ economic desires for Taiwan even while the issue of their respective stances towards its legal-political-military status may not be resolved for quite a while.